bootindex was incorrectly changed to a device Property during the platform code split, resulting in it no longer working. Remove it. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Cc: qemu-stable@nongnu.org # v2.3+
3798 lines
120 KiB
C
3798 lines
120 KiB
C
/*
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* vfio based device assignment support
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*
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* Copyright Red Hat, Inc. 2012
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*
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* Authors:
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* Alex Williamson <alex.williamson@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Based on qemu-kvm device-assignment:
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* Adapted for KVM by Qumranet.
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* Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
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* Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
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* Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
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* Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
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* Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
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*/
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#include <dirent.h>
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#include <linux/vfio.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "config.h"
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#include "exec/address-spaces.h"
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#include "exec/memory.h"
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#include "hw/pci/msi.h"
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#include "hw/pci/msix.h"
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#include "hw/pci/pci.h"
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#include "qemu-common.h"
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#include "qemu/error-report.h"
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#include "qemu/event_notifier.h"
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#include "qemu/queue.h"
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#include "qemu/range.h"
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#include "sysemu/kvm.h"
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#include "sysemu/sysemu.h"
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#include "trace.h"
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#include "hw/vfio/vfio.h"
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#include "hw/vfio/vfio-common.h"
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struct VFIOPCIDevice;
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typedef struct VFIOQuirk {
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MemoryRegion mem;
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struct VFIOPCIDevice *vdev;
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QLIST_ENTRY(VFIOQuirk) next;
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struct {
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uint32_t base_offset:TARGET_PAGE_BITS;
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uint32_t address_offset:TARGET_PAGE_BITS;
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uint32_t address_size:3;
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uint32_t bar:3;
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uint32_t address_match;
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uint32_t address_mask;
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uint32_t address_val:TARGET_PAGE_BITS;
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uint32_t data_offset:TARGET_PAGE_BITS;
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uint32_t data_size:3;
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uint8_t flags;
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uint8_t read_flags;
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uint8_t write_flags;
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} data;
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} VFIOQuirk;
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typedef struct VFIOBAR {
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VFIORegion region;
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bool ioport;
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bool mem64;
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QLIST_HEAD(, VFIOQuirk) quirks;
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} VFIOBAR;
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typedef struct VFIOVGARegion {
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MemoryRegion mem;
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off_t offset;
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int nr;
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QLIST_HEAD(, VFIOQuirk) quirks;
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} VFIOVGARegion;
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typedef struct VFIOVGA {
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off_t fd_offset;
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int fd;
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VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS];
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} VFIOVGA;
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typedef struct VFIOINTx {
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bool pending; /* interrupt pending */
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bool kvm_accel; /* set when QEMU bypass through KVM enabled */
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uint8_t pin; /* which pin to pull for qemu_set_irq */
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EventNotifier interrupt; /* eventfd triggered on interrupt */
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EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
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PCIINTxRoute route; /* routing info for QEMU bypass */
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uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
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QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */
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} VFIOINTx;
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typedef struct VFIOMSIVector {
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/*
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* Two interrupt paths are configured per vector. The first, is only used
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* for interrupts injected via QEMU. This is typically the non-accel path,
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* but may also be used when we want QEMU to handle masking and pending
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* bits. The KVM path bypasses QEMU and is therefore higher performance,
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* but requires masking at the device. virq is used to track the MSI route
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* through KVM, thus kvm_interrupt is only available when virq is set to a
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* valid (>= 0) value.
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*/
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EventNotifier interrupt;
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EventNotifier kvm_interrupt;
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struct VFIOPCIDevice *vdev; /* back pointer to device */
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int virq;
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bool use;
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} VFIOMSIVector;
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enum {
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VFIO_INT_NONE = 0,
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VFIO_INT_INTx = 1,
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VFIO_INT_MSI = 2,
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VFIO_INT_MSIX = 3,
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};
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/* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
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typedef struct VFIOMSIXInfo {
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uint8_t table_bar;
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uint8_t pba_bar;
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uint16_t entries;
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uint32_t table_offset;
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uint32_t pba_offset;
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MemoryRegion mmap_mem;
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void *mmap;
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} VFIOMSIXInfo;
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typedef struct VFIOPCIDevice {
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PCIDevice pdev;
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VFIODevice vbasedev;
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VFIOINTx intx;
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unsigned int config_size;
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uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */
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off_t config_offset; /* Offset of config space region within device fd */
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unsigned int rom_size;
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off_t rom_offset; /* Offset of ROM region within device fd */
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void *rom;
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int msi_cap_size;
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VFIOMSIVector *msi_vectors;
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VFIOMSIXInfo *msix;
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int nr_vectors; /* Number of MSI/MSIX vectors currently in use */
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int interrupt; /* Current interrupt type */
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VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */
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VFIOVGA vga; /* 0xa0000, 0x3b0, 0x3c0 */
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PCIHostDeviceAddress host;
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EventNotifier err_notifier;
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EventNotifier req_notifier;
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int (*resetfn)(struct VFIOPCIDevice *);
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uint32_t features;
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#define VFIO_FEATURE_ENABLE_VGA_BIT 0
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#define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
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#define VFIO_FEATURE_ENABLE_REQ_BIT 1
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#define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT)
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int32_t bootindex;
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uint8_t pm_cap;
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bool has_vga;
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bool pci_aer;
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bool req_enabled;
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bool has_flr;
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bool has_pm_reset;
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bool rom_read_failed;
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} VFIOPCIDevice;
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typedef struct VFIORomBlacklistEntry {
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uint16_t vendor_id;
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uint16_t device_id;
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} VFIORomBlacklistEntry;
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/*
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* List of device ids/vendor ids for which to disable
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* option rom loading. This avoids the guest hangs during rom
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* execution as noticed with the BCM 57810 card for lack of a
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* more better way to handle such issues.
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* The user can still override by specifying a romfile or
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* rombar=1.
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* Please see https://bugs.launchpad.net/qemu/+bug/1284874
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* for an analysis of the 57810 card hang. When adding
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* a new vendor id/device id combination below, please also add
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* your card/environment details and information that could
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* help in debugging to the bug tracking this issue
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*/
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static const VFIORomBlacklistEntry romblacklist[] = {
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/* Broadcom BCM 57810 */
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{ 0x14e4, 0x168e }
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};
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#define MSIX_CAP_LENGTH 12
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static void vfio_disable_interrupts(VFIOPCIDevice *vdev);
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static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
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static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr,
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uint32_t val, int len);
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static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled);
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/*
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* Disabling BAR mmaping can be slow, but toggling it around INTx can
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* also be a huge overhead. We try to get the best of both worlds by
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* waiting until an interrupt to disable mmaps (subsequent transitions
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* to the same state are effectively no overhead). If the interrupt has
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* been serviced and the time gap is long enough, we re-enable mmaps for
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* performance. This works well for things like graphics cards, which
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* may not use their interrupt at all and are penalized to an unusable
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* level by read/write BAR traps. Other devices, like NICs, have more
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* regular interrupts and see much better latency by staying in non-mmap
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* mode. We therefore set the default mmap_timeout such that a ping
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* is just enough to keep the mmap disabled. Users can experiment with
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* other options with the x-intx-mmap-timeout-ms parameter (a value of
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* zero disables the timer).
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*/
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static void vfio_intx_mmap_enable(void *opaque)
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{
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VFIOPCIDevice *vdev = opaque;
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if (vdev->intx.pending) {
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timer_mod(vdev->intx.mmap_timer,
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qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
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return;
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}
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vfio_mmap_set_enabled(vdev, true);
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}
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static void vfio_intx_interrupt(void *opaque)
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{
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VFIOPCIDevice *vdev = opaque;
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if (!event_notifier_test_and_clear(&vdev->intx.interrupt)) {
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return;
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}
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trace_vfio_intx_interrupt(vdev->vbasedev.name, 'A' + vdev->intx.pin);
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vdev->intx.pending = true;
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pci_irq_assert(&vdev->pdev);
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vfio_mmap_set_enabled(vdev, false);
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if (vdev->intx.mmap_timeout) {
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timer_mod(vdev->intx.mmap_timer,
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qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
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}
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}
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static void vfio_eoi(VFIODevice *vbasedev)
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{
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VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
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if (!vdev->intx.pending) {
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return;
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}
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trace_vfio_eoi(vbasedev->name);
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vdev->intx.pending = false;
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pci_irq_deassert(&vdev->pdev);
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vfio_unmask_single_irqindex(vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
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}
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static void vfio_enable_intx_kvm(VFIOPCIDevice *vdev)
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{
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#ifdef CONFIG_KVM
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struct kvm_irqfd irqfd = {
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.fd = event_notifier_get_fd(&vdev->intx.interrupt),
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.gsi = vdev->intx.route.irq,
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.flags = KVM_IRQFD_FLAG_RESAMPLE,
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};
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struct vfio_irq_set *irq_set;
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int ret, argsz;
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int32_t *pfd;
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if (!VFIO_ALLOW_KVM_INTX || !kvm_irqfds_enabled() ||
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vdev->intx.route.mode != PCI_INTX_ENABLED ||
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!kvm_resamplefds_enabled()) {
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return;
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}
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/* Get to a known interrupt state */
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qemu_set_fd_handler(irqfd.fd, NULL, NULL, vdev);
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vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
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vdev->intx.pending = false;
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pci_irq_deassert(&vdev->pdev);
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/* Get an eventfd for resample/unmask */
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if (event_notifier_init(&vdev->intx.unmask, 0)) {
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error_report("vfio: Error: event_notifier_init failed eoi");
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goto fail;
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}
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/* KVM triggers it, VFIO listens for it */
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irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask);
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if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
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error_report("vfio: Error: Failed to setup resample irqfd: %m");
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goto fail_irqfd;
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}
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argsz = sizeof(*irq_set) + sizeof(*pfd);
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irq_set = g_malloc0(argsz);
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irq_set->argsz = argsz;
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irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK;
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irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
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irq_set->start = 0;
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irq_set->count = 1;
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pfd = (int32_t *)&irq_set->data;
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*pfd = irqfd.resamplefd;
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ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
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g_free(irq_set);
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if (ret) {
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error_report("vfio: Error: Failed to setup INTx unmask fd: %m");
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goto fail_vfio;
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}
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/* Let'em rip */
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vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
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vdev->intx.kvm_accel = true;
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trace_vfio_enable_intx_kvm(vdev->vbasedev.name);
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return;
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fail_vfio:
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irqfd.flags = KVM_IRQFD_FLAG_DEASSIGN;
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kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);
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fail_irqfd:
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event_notifier_cleanup(&vdev->intx.unmask);
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fail:
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qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
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vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
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#endif
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}
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static void vfio_disable_intx_kvm(VFIOPCIDevice *vdev)
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{
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#ifdef CONFIG_KVM
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struct kvm_irqfd irqfd = {
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.fd = event_notifier_get_fd(&vdev->intx.interrupt),
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.gsi = vdev->intx.route.irq,
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.flags = KVM_IRQFD_FLAG_DEASSIGN,
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};
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if (!vdev->intx.kvm_accel) {
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return;
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}
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/*
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* Get to a known state, hardware masked, QEMU ready to accept new
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* interrupts, QEMU IRQ de-asserted.
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*/
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vfio_mask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
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vdev->intx.pending = false;
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pci_irq_deassert(&vdev->pdev);
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/* Tell KVM to stop listening for an INTx irqfd */
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if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
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error_report("vfio: Error: Failed to disable INTx irqfd: %m");
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}
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/* We only need to close the eventfd for VFIO to cleanup the kernel side */
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event_notifier_cleanup(&vdev->intx.unmask);
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/* QEMU starts listening for interrupt events. */
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qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
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|
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vdev->intx.kvm_accel = false;
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|
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/* If we've missed an event, let it re-fire through QEMU */
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vfio_unmask_single_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
|
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|
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trace_vfio_disable_intx_kvm(vdev->vbasedev.name);
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#endif
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}
|
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|
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static void vfio_update_irq(PCIDevice *pdev)
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{
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VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
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PCIINTxRoute route;
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|
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if (vdev->interrupt != VFIO_INT_INTx) {
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return;
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}
|
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|
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route = pci_device_route_intx_to_irq(&vdev->pdev, vdev->intx.pin);
|
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|
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if (!pci_intx_route_changed(&vdev->intx.route, &route)) {
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return; /* Nothing changed */
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}
|
|
|
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trace_vfio_update_irq(vdev->vbasedev.name,
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vdev->intx.route.irq, route.irq);
|
|
|
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vfio_disable_intx_kvm(vdev);
|
|
|
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vdev->intx.route = route;
|
|
|
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if (route.mode != PCI_INTX_ENABLED) {
|
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return;
|
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}
|
|
|
|
vfio_enable_intx_kvm(vdev);
|
|
|
|
/* Re-enable the interrupt in cased we missed an EOI */
|
|
vfio_eoi(&vdev->vbasedev);
|
|
}
|
|
|
|
static int vfio_enable_intx(VFIOPCIDevice *vdev)
|
|
{
|
|
uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
|
|
int ret, argsz;
|
|
struct vfio_irq_set *irq_set;
|
|
int32_t *pfd;
|
|
|
|
if (!pin) {
|
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return 0;
|
|
}
|
|
|
|
vfio_disable_interrupts(vdev);
|
|
|
|
vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */
|
|
pci_config_set_interrupt_pin(vdev->pdev.config, pin);
|
|
|
|
#ifdef CONFIG_KVM
|
|
/*
|
|
* Only conditional to avoid generating error messages on platforms
|
|
* where we won't actually use the result anyway.
|
|
*/
|
|
if (kvm_irqfds_enabled() && kvm_resamplefds_enabled()) {
|
|
vdev->intx.route = pci_device_route_intx_to_irq(&vdev->pdev,
|
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vdev->intx.pin);
|
|
}
|
|
#endif
|
|
|
|
ret = event_notifier_init(&vdev->intx.interrupt, 0);
|
|
if (ret) {
|
|
error_report("vfio: Error: event_notifier_init failed");
|
|
return ret;
|
|
}
|
|
|
|
argsz = sizeof(*irq_set) + sizeof(*pfd);
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
|
|
irq_set->start = 0;
|
|
irq_set->count = 1;
|
|
pfd = (int32_t *)&irq_set->data;
|
|
|
|
*pfd = event_notifier_get_fd(&vdev->intx.interrupt);
|
|
qemu_set_fd_handler(*pfd, vfio_intx_interrupt, NULL, vdev);
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
|
|
g_free(irq_set);
|
|
if (ret) {
|
|
error_report("vfio: Error: Failed to setup INTx fd: %m");
|
|
qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
|
|
event_notifier_cleanup(&vdev->intx.interrupt);
|
|
return -errno;
|
|
}
|
|
|
|
vfio_enable_intx_kvm(vdev);
|
|
|
|
vdev->interrupt = VFIO_INT_INTx;
|
|
|
|
trace_vfio_enable_intx(vdev->vbasedev.name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vfio_disable_intx(VFIOPCIDevice *vdev)
|
|
{
|
|
int fd;
|
|
|
|
timer_del(vdev->intx.mmap_timer);
|
|
vfio_disable_intx_kvm(vdev);
|
|
vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX);
|
|
vdev->intx.pending = false;
|
|
pci_irq_deassert(&vdev->pdev);
|
|
vfio_mmap_set_enabled(vdev, true);
|
|
|
|
fd = event_notifier_get_fd(&vdev->intx.interrupt);
|
|
qemu_set_fd_handler(fd, NULL, NULL, vdev);
|
|
event_notifier_cleanup(&vdev->intx.interrupt);
|
|
|
|
vdev->interrupt = VFIO_INT_NONE;
|
|
|
|
trace_vfio_disable_intx(vdev->vbasedev.name);
|
|
}
|
|
|
|
/*
|
|
* MSI/X
|
|
*/
|
|
static void vfio_msi_interrupt(void *opaque)
|
|
{
|
|
VFIOMSIVector *vector = opaque;
|
|
VFIOPCIDevice *vdev = vector->vdev;
|
|
int nr = vector - vdev->msi_vectors;
|
|
|
|
if (!event_notifier_test_and_clear(&vector->interrupt)) {
|
|
return;
|
|
}
|
|
|
|
#ifdef DEBUG_VFIO
|
|
MSIMessage msg;
|
|
|
|
if (vdev->interrupt == VFIO_INT_MSIX) {
|
|
msg = msix_get_message(&vdev->pdev, nr);
|
|
} else if (vdev->interrupt == VFIO_INT_MSI) {
|
|
msg = msi_get_message(&vdev->pdev, nr);
|
|
} else {
|
|
abort();
|
|
}
|
|
|
|
trace_vfio_msi_interrupt(vdev->vbasedev.name, nr, msg.address, msg.data);
|
|
#endif
|
|
|
|
if (vdev->interrupt == VFIO_INT_MSIX) {
|
|
msix_notify(&vdev->pdev, nr);
|
|
} else if (vdev->interrupt == VFIO_INT_MSI) {
|
|
msi_notify(&vdev->pdev, nr);
|
|
} else {
|
|
error_report("vfio: MSI interrupt receieved, but not enabled?");
|
|
}
|
|
}
|
|
|
|
static int vfio_enable_vectors(VFIOPCIDevice *vdev, bool msix)
|
|
{
|
|
struct vfio_irq_set *irq_set;
|
|
int ret = 0, i, argsz;
|
|
int32_t *fds;
|
|
|
|
argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds));
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX;
|
|
irq_set->start = 0;
|
|
irq_set->count = vdev->nr_vectors;
|
|
fds = (int32_t *)&irq_set->data;
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
int fd = -1;
|
|
|
|
/*
|
|
* MSI vs MSI-X - The guest has direct access to MSI mask and pending
|
|
* bits, therefore we always use the KVM signaling path when setup.
|
|
* MSI-X mask and pending bits are emulated, so we want to use the
|
|
* KVM signaling path only when configured and unmasked.
|
|
*/
|
|
if (vdev->msi_vectors[i].use) {
|
|
if (vdev->msi_vectors[i].virq < 0 ||
|
|
(msix && msix_is_masked(&vdev->pdev, i))) {
|
|
fd = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt);
|
|
} else {
|
|
fd = event_notifier_get_fd(&vdev->msi_vectors[i].kvm_interrupt);
|
|
}
|
|
}
|
|
|
|
fds[i] = fd;
|
|
}
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
|
|
|
|
g_free(irq_set);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_add_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage *msg,
|
|
bool msix)
|
|
{
|
|
int virq;
|
|
|
|
if ((msix && !VFIO_ALLOW_KVM_MSIX) ||
|
|
(!msix && !VFIO_ALLOW_KVM_MSI) || !msg) {
|
|
return;
|
|
}
|
|
|
|
if (event_notifier_init(&vector->kvm_interrupt, 0)) {
|
|
return;
|
|
}
|
|
|
|
virq = kvm_irqchip_add_msi_route(kvm_state, *msg);
|
|
if (virq < 0) {
|
|
event_notifier_cleanup(&vector->kvm_interrupt);
|
|
return;
|
|
}
|
|
|
|
if (kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &vector->kvm_interrupt,
|
|
NULL, virq) < 0) {
|
|
kvm_irqchip_release_virq(kvm_state, virq);
|
|
event_notifier_cleanup(&vector->kvm_interrupt);
|
|
return;
|
|
}
|
|
|
|
vector->virq = virq;
|
|
}
|
|
|
|
static void vfio_remove_kvm_msi_virq(VFIOMSIVector *vector)
|
|
{
|
|
kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, &vector->kvm_interrupt,
|
|
vector->virq);
|
|
kvm_irqchip_release_virq(kvm_state, vector->virq);
|
|
vector->virq = -1;
|
|
event_notifier_cleanup(&vector->kvm_interrupt);
|
|
}
|
|
|
|
static void vfio_update_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage msg)
|
|
{
|
|
kvm_irqchip_update_msi_route(kvm_state, vector->virq, msg);
|
|
}
|
|
|
|
static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
|
|
MSIMessage *msg, IOHandler *handler)
|
|
{
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
|
|
VFIOMSIVector *vector;
|
|
int ret;
|
|
|
|
trace_vfio_msix_vector_do_use(vdev->vbasedev.name, nr);
|
|
|
|
vector = &vdev->msi_vectors[nr];
|
|
|
|
if (!vector->use) {
|
|
vector->vdev = vdev;
|
|
vector->virq = -1;
|
|
if (event_notifier_init(&vector->interrupt, 0)) {
|
|
error_report("vfio: Error: event_notifier_init failed");
|
|
}
|
|
vector->use = true;
|
|
msix_vector_use(pdev, nr);
|
|
}
|
|
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
handler, NULL, vector);
|
|
|
|
/*
|
|
* Attempt to enable route through KVM irqchip,
|
|
* default to userspace handling if unavailable.
|
|
*/
|
|
if (vector->virq >= 0) {
|
|
if (!msg) {
|
|
vfio_remove_kvm_msi_virq(vector);
|
|
} else {
|
|
vfio_update_kvm_msi_virq(vector, *msg);
|
|
}
|
|
} else {
|
|
vfio_add_kvm_msi_virq(vector, msg, true);
|
|
}
|
|
|
|
/*
|
|
* We don't want to have the host allocate all possible MSI vectors
|
|
* for a device if they're not in use, so we shutdown and incrementally
|
|
* increase them as needed.
|
|
*/
|
|
if (vdev->nr_vectors < nr + 1) {
|
|
vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX);
|
|
vdev->nr_vectors = nr + 1;
|
|
ret = vfio_enable_vectors(vdev, true);
|
|
if (ret) {
|
|
error_report("vfio: failed to enable vectors, %d", ret);
|
|
}
|
|
} else {
|
|
int argsz;
|
|
struct vfio_irq_set *irq_set;
|
|
int32_t *pfd;
|
|
|
|
argsz = sizeof(*irq_set) + sizeof(*pfd);
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
|
|
VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
|
|
irq_set->start = nr;
|
|
irq_set->count = 1;
|
|
pfd = (int32_t *)&irq_set->data;
|
|
|
|
if (vector->virq >= 0) {
|
|
*pfd = event_notifier_get_fd(&vector->kvm_interrupt);
|
|
} else {
|
|
*pfd = event_notifier_get_fd(&vector->interrupt);
|
|
}
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
|
|
g_free(irq_set);
|
|
if (ret) {
|
|
error_report("vfio: failed to modify vector, %d", ret);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_msix_vector_use(PCIDevice *pdev,
|
|
unsigned int nr, MSIMessage msg)
|
|
{
|
|
return vfio_msix_vector_do_use(pdev, nr, &msg, vfio_msi_interrupt);
|
|
}
|
|
|
|
static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr)
|
|
{
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[nr];
|
|
|
|
trace_vfio_msix_vector_release(vdev->vbasedev.name, nr);
|
|
|
|
/*
|
|
* There are still old guests that mask and unmask vectors on every
|
|
* interrupt. If we're using QEMU bypass with a KVM irqfd, leave all of
|
|
* the KVM setup in place, simply switch VFIO to use the non-bypass
|
|
* eventfd. We'll then fire the interrupt through QEMU and the MSI-X
|
|
* core will mask the interrupt and set pending bits, allowing it to
|
|
* be re-asserted on unmask. Nothing to do if already using QEMU mode.
|
|
*/
|
|
if (vector->virq >= 0) {
|
|
int argsz;
|
|
struct vfio_irq_set *irq_set;
|
|
int32_t *pfd;
|
|
|
|
argsz = sizeof(*irq_set) + sizeof(*pfd);
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
|
|
VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
|
|
irq_set->start = nr;
|
|
irq_set->count = 1;
|
|
pfd = (int32_t *)&irq_set->data;
|
|
|
|
*pfd = event_notifier_get_fd(&vector->interrupt);
|
|
|
|
ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
|
|
|
|
g_free(irq_set);
|
|
}
|
|
}
|
|
|
|
static void vfio_enable_msix(VFIOPCIDevice *vdev)
|
|
{
|
|
vfio_disable_interrupts(vdev);
|
|
|
|
vdev->msi_vectors = g_malloc0(vdev->msix->entries * sizeof(VFIOMSIVector));
|
|
|
|
vdev->interrupt = VFIO_INT_MSIX;
|
|
|
|
/*
|
|
* Some communication channels between VF & PF or PF & fw rely on the
|
|
* physical state of the device and expect that enabling MSI-X from the
|
|
* guest enables the same on the host. When our guest is Linux, the
|
|
* guest driver call to pci_enable_msix() sets the enabling bit in the
|
|
* MSI-X capability, but leaves the vector table masked. We therefore
|
|
* can't rely on a vector_use callback (from request_irq() in the guest)
|
|
* to switch the physical device into MSI-X mode because that may come a
|
|
* long time after pci_enable_msix(). This code enables vector 0 with
|
|
* triggering to userspace, then immediately release the vector, leaving
|
|
* the physical device with no vectors enabled, but MSI-X enabled, just
|
|
* like the guest view.
|
|
*/
|
|
vfio_msix_vector_do_use(&vdev->pdev, 0, NULL, NULL);
|
|
vfio_msix_vector_release(&vdev->pdev, 0);
|
|
|
|
if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
|
|
vfio_msix_vector_release, NULL)) {
|
|
error_report("vfio: msix_set_vector_notifiers failed");
|
|
}
|
|
|
|
trace_vfio_enable_msix(vdev->vbasedev.name);
|
|
}
|
|
|
|
static void vfio_enable_msi(VFIOPCIDevice *vdev)
|
|
{
|
|
int ret, i;
|
|
|
|
vfio_disable_interrupts(vdev);
|
|
|
|
vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
|
|
retry:
|
|
vdev->msi_vectors = g_malloc0(vdev->nr_vectors * sizeof(VFIOMSIVector));
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[i];
|
|
MSIMessage msg = msi_get_message(&vdev->pdev, i);
|
|
|
|
vector->vdev = vdev;
|
|
vector->virq = -1;
|
|
vector->use = true;
|
|
|
|
if (event_notifier_init(&vector->interrupt, 0)) {
|
|
error_report("vfio: Error: event_notifier_init failed");
|
|
}
|
|
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
vfio_msi_interrupt, NULL, vector);
|
|
|
|
/*
|
|
* Attempt to enable route through KVM irqchip,
|
|
* default to userspace handling if unavailable.
|
|
*/
|
|
vfio_add_kvm_msi_virq(vector, &msg, false);
|
|
}
|
|
|
|
/* Set interrupt type prior to possible interrupts */
|
|
vdev->interrupt = VFIO_INT_MSI;
|
|
|
|
ret = vfio_enable_vectors(vdev, false);
|
|
if (ret) {
|
|
if (ret < 0) {
|
|
error_report("vfio: Error: Failed to setup MSI fds: %m");
|
|
} else if (ret != vdev->nr_vectors) {
|
|
error_report("vfio: Error: Failed to enable %d "
|
|
"MSI vectors, retry with %d", vdev->nr_vectors, ret);
|
|
}
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[i];
|
|
if (vector->virq >= 0) {
|
|
vfio_remove_kvm_msi_virq(vector);
|
|
}
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
NULL, NULL, NULL);
|
|
event_notifier_cleanup(&vector->interrupt);
|
|
}
|
|
|
|
g_free(vdev->msi_vectors);
|
|
|
|
if (ret > 0 && ret != vdev->nr_vectors) {
|
|
vdev->nr_vectors = ret;
|
|
goto retry;
|
|
}
|
|
vdev->nr_vectors = 0;
|
|
|
|
/*
|
|
* Failing to setup MSI doesn't really fall within any specification.
|
|
* Let's try leaving interrupts disabled and hope the guest figures
|
|
* out to fall back to INTx for this device.
|
|
*/
|
|
error_report("vfio: Error: Failed to enable MSI");
|
|
vdev->interrupt = VFIO_INT_NONE;
|
|
|
|
return;
|
|
}
|
|
|
|
trace_vfio_enable_msi(vdev->vbasedev.name, vdev->nr_vectors);
|
|
}
|
|
|
|
static void vfio_disable_msi_common(VFIOPCIDevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[i];
|
|
if (vdev->msi_vectors[i].use) {
|
|
if (vector->virq >= 0) {
|
|
vfio_remove_kvm_msi_virq(vector);
|
|
}
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
|
|
NULL, NULL, NULL);
|
|
event_notifier_cleanup(&vector->interrupt);
|
|
}
|
|
}
|
|
|
|
g_free(vdev->msi_vectors);
|
|
vdev->msi_vectors = NULL;
|
|
vdev->nr_vectors = 0;
|
|
vdev->interrupt = VFIO_INT_NONE;
|
|
|
|
vfio_enable_intx(vdev);
|
|
}
|
|
|
|
static void vfio_disable_msix(VFIOPCIDevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
msix_unset_vector_notifiers(&vdev->pdev);
|
|
|
|
/*
|
|
* MSI-X will only release vectors if MSI-X is still enabled on the
|
|
* device, check through the rest and release it ourselves if necessary.
|
|
*/
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
if (vdev->msi_vectors[i].use) {
|
|
vfio_msix_vector_release(&vdev->pdev, i);
|
|
msix_vector_unuse(&vdev->pdev, i);
|
|
}
|
|
}
|
|
|
|
if (vdev->nr_vectors) {
|
|
vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSIX_IRQ_INDEX);
|
|
}
|
|
|
|
vfio_disable_msi_common(vdev);
|
|
|
|
trace_vfio_disable_msix(vdev->vbasedev.name);
|
|
}
|
|
|
|
static void vfio_disable_msi(VFIOPCIDevice *vdev)
|
|
{
|
|
vfio_disable_irqindex(&vdev->vbasedev, VFIO_PCI_MSI_IRQ_INDEX);
|
|
vfio_disable_msi_common(vdev);
|
|
|
|
trace_vfio_disable_msi(vdev->vbasedev.name);
|
|
}
|
|
|
|
static void vfio_update_msi(VFIOPCIDevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < vdev->nr_vectors; i++) {
|
|
VFIOMSIVector *vector = &vdev->msi_vectors[i];
|
|
MSIMessage msg;
|
|
|
|
if (!vector->use || vector->virq < 0) {
|
|
continue;
|
|
}
|
|
|
|
msg = msi_get_message(&vdev->pdev, i);
|
|
vfio_update_kvm_msi_virq(vector, msg);
|
|
}
|
|
}
|
|
|
|
static void vfio_pci_load_rom(VFIOPCIDevice *vdev)
|
|
{
|
|
struct vfio_region_info reg_info = {
|
|
.argsz = sizeof(reg_info),
|
|
.index = VFIO_PCI_ROM_REGION_INDEX
|
|
};
|
|
uint64_t size;
|
|
off_t off = 0;
|
|
ssize_t bytes;
|
|
|
|
if (ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_REGION_INFO, ®_info)) {
|
|
error_report("vfio: Error getting ROM info: %m");
|
|
return;
|
|
}
|
|
|
|
trace_vfio_pci_load_rom(vdev->vbasedev.name, (unsigned long)reg_info.size,
|
|
(unsigned long)reg_info.offset,
|
|
(unsigned long)reg_info.flags);
|
|
|
|
vdev->rom_size = size = reg_info.size;
|
|
vdev->rom_offset = reg_info.offset;
|
|
|
|
if (!vdev->rom_size) {
|
|
vdev->rom_read_failed = true;
|
|
error_report("vfio-pci: Cannot read device rom at "
|
|
"%s", vdev->vbasedev.name);
|
|
error_printf("Device option ROM contents are probably invalid "
|
|
"(check dmesg).\nSkip option ROM probe with rombar=0, "
|
|
"or load from file with romfile=\n");
|
|
return;
|
|
}
|
|
|
|
vdev->rom = g_malloc(size);
|
|
memset(vdev->rom, 0xff, size);
|
|
|
|
while (size) {
|
|
bytes = pread(vdev->vbasedev.fd, vdev->rom + off,
|
|
size, vdev->rom_offset + off);
|
|
if (bytes == 0) {
|
|
break;
|
|
} else if (bytes > 0) {
|
|
off += bytes;
|
|
size -= bytes;
|
|
} else {
|
|
if (errno == EINTR || errno == EAGAIN) {
|
|
continue;
|
|
}
|
|
error_report("vfio: Error reading device ROM: %m");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
|
|
{
|
|
VFIOPCIDevice *vdev = opaque;
|
|
union {
|
|
uint8_t byte;
|
|
uint16_t word;
|
|
uint32_t dword;
|
|
uint64_t qword;
|
|
} val;
|
|
uint64_t data = 0;
|
|
|
|
/* Load the ROM lazily when the guest tries to read it */
|
|
if (unlikely(!vdev->rom && !vdev->rom_read_failed)) {
|
|
vfio_pci_load_rom(vdev);
|
|
}
|
|
|
|
memcpy(&val, vdev->rom + addr,
|
|
(addr < vdev->rom_size) ? MIN(size, vdev->rom_size - addr) : 0);
|
|
|
|
switch (size) {
|
|
case 1:
|
|
data = val.byte;
|
|
break;
|
|
case 2:
|
|
data = le16_to_cpu(val.word);
|
|
break;
|
|
case 4:
|
|
data = le32_to_cpu(val.dword);
|
|
break;
|
|
default:
|
|
hw_error("vfio: unsupported read size, %d bytes\n", size);
|
|
break;
|
|
}
|
|
|
|
trace_vfio_rom_read(vdev->vbasedev.name, addr, size, data);
|
|
|
|
return data;
|
|
}
|
|
|
|
static void vfio_rom_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_rom_ops = {
|
|
.read = vfio_rom_read,
|
|
.write = vfio_rom_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
uint16_t vendor_id, device_id;
|
|
int count = 0;
|
|
|
|
vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
|
|
device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
|
|
|
|
while (count < ARRAY_SIZE(romblacklist)) {
|
|
if (romblacklist[count].vendor_id == vendor_id &&
|
|
romblacklist[count].device_id == device_id) {
|
|
return true;
|
|
}
|
|
count++;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
|
|
{
|
|
uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK);
|
|
off_t offset = vdev->config_offset + PCI_ROM_ADDRESS;
|
|
DeviceState *dev = DEVICE(vdev);
|
|
char name[32];
|
|
int fd = vdev->vbasedev.fd;
|
|
|
|
if (vdev->pdev.romfile || !vdev->pdev.rom_bar) {
|
|
/* Since pci handles romfile, just print a message and return */
|
|
if (vfio_blacklist_opt_rom(vdev) && vdev->pdev.romfile) {
|
|
error_printf("Warning : Device at %04x:%02x:%02x.%x "
|
|
"is known to cause system instability issues during "
|
|
"option rom execution. "
|
|
"Proceeding anyway since user specified romfile\n",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Use the same size ROM BAR as the physical device. The contents
|
|
* will get filled in later when the guest tries to read it.
|
|
*/
|
|
if (pread(fd, &orig, 4, offset) != 4 ||
|
|
pwrite(fd, &size, 4, offset) != 4 ||
|
|
pread(fd, &size, 4, offset) != 4 ||
|
|
pwrite(fd, &orig, 4, offset) != 4) {
|
|
error_report("%s(%04x:%02x:%02x.%x) failed: %m",
|
|
__func__, vdev->host.domain, vdev->host.bus,
|
|
vdev->host.slot, vdev->host.function);
|
|
return;
|
|
}
|
|
|
|
size = ~(le32_to_cpu(size) & PCI_ROM_ADDRESS_MASK) + 1;
|
|
|
|
if (!size) {
|
|
return;
|
|
}
|
|
|
|
if (vfio_blacklist_opt_rom(vdev)) {
|
|
if (dev->opts && qemu_opt_get(dev->opts, "rombar")) {
|
|
error_printf("Warning : Device at %04x:%02x:%02x.%x "
|
|
"is known to cause system instability issues during "
|
|
"option rom execution. "
|
|
"Proceeding anyway since user specified non zero value for "
|
|
"rombar\n",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
} else {
|
|
error_printf("Warning : Rom loading for device at "
|
|
"%04x:%02x:%02x.%x has been disabled due to "
|
|
"system instability issues. "
|
|
"Specify rombar=1 or romfile to force\n",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
return;
|
|
}
|
|
}
|
|
|
|
trace_vfio_pci_size_rom(vdev->vbasedev.name, size);
|
|
|
|
snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
|
|
memory_region_init_io(&vdev->pdev.rom, OBJECT(vdev),
|
|
&vfio_rom_ops, vdev, name, size);
|
|
|
|
pci_register_bar(&vdev->pdev, PCI_ROM_SLOT,
|
|
PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom);
|
|
|
|
vdev->pdev.has_rom = true;
|
|
vdev->rom_read_failed = false;
|
|
}
|
|
|
|
static void vfio_vga_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOVGARegion *region = opaque;
|
|
VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
|
|
union {
|
|
uint8_t byte;
|
|
uint16_t word;
|
|
uint32_t dword;
|
|
uint64_t qword;
|
|
} buf;
|
|
off_t offset = vga->fd_offset + region->offset + addr;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
buf.byte = data;
|
|
break;
|
|
case 2:
|
|
buf.word = cpu_to_le16(data);
|
|
break;
|
|
case 4:
|
|
buf.dword = cpu_to_le32(data);
|
|
break;
|
|
default:
|
|
hw_error("vfio: unsupported write size, %d bytes", size);
|
|
break;
|
|
}
|
|
|
|
if (pwrite(vga->fd, &buf, size, offset) != size) {
|
|
error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m",
|
|
__func__, region->offset + addr, data, size);
|
|
}
|
|
|
|
trace_vfio_vga_write(region->offset + addr, data, size);
|
|
}
|
|
|
|
static uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size)
|
|
{
|
|
VFIOVGARegion *region = opaque;
|
|
VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
|
|
union {
|
|
uint8_t byte;
|
|
uint16_t word;
|
|
uint32_t dword;
|
|
uint64_t qword;
|
|
} buf;
|
|
uint64_t data = 0;
|
|
off_t offset = vga->fd_offset + region->offset + addr;
|
|
|
|
if (pread(vga->fd, &buf, size, offset) != size) {
|
|
error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m",
|
|
__func__, region->offset + addr, size);
|
|
return (uint64_t)-1;
|
|
}
|
|
|
|
switch (size) {
|
|
case 1:
|
|
data = buf.byte;
|
|
break;
|
|
case 2:
|
|
data = le16_to_cpu(buf.word);
|
|
break;
|
|
case 4:
|
|
data = le32_to_cpu(buf.dword);
|
|
break;
|
|
default:
|
|
hw_error("vfio: unsupported read size, %d bytes", size);
|
|
break;
|
|
}
|
|
|
|
trace_vfio_vga_read(region->offset + addr, size, data);
|
|
|
|
return data;
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_vga_ops = {
|
|
.read = vfio_vga_read,
|
|
.write = vfio_vga_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
/*
|
|
* Device specific quirks
|
|
*/
|
|
|
|
/* Is range1 fully contained within range2? */
|
|
static bool vfio_range_contained(uint64_t first1, uint64_t len1,
|
|
uint64_t first2, uint64_t len2) {
|
|
return (first1 >= first2 && first1 + len1 <= first2 + len2);
|
|
}
|
|
|
|
static bool vfio_flags_enabled(uint8_t flags, uint8_t mask)
|
|
{
|
|
return (mask && (flags & mask) == mask);
|
|
}
|
|
|
|
static uint64_t vfio_generic_window_quirk_read(void *opaque,
|
|
hwaddr addr, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
uint64_t data;
|
|
|
|
if (vfio_flags_enabled(quirk->data.flags, quirk->data.read_flags) &&
|
|
ranges_overlap(addr, size,
|
|
quirk->data.data_offset, quirk->data.data_size)) {
|
|
hwaddr offset = addr - quirk->data.data_offset;
|
|
|
|
if (!vfio_range_contained(addr, size, quirk->data.data_offset,
|
|
quirk->data.data_size)) {
|
|
hw_error("%s: window data read not fully contained: %s",
|
|
__func__, memory_region_name(&quirk->mem));
|
|
}
|
|
|
|
data = vfio_pci_read_config(&vdev->pdev,
|
|
quirk->data.address_val + offset, size);
|
|
|
|
trace_vfio_generic_window_quirk_read(memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name,
|
|
quirk->data.bar,
|
|
addr, size, data);
|
|
} else {
|
|
data = vfio_region_read(&vdev->bars[quirk->data.bar].region,
|
|
addr + quirk->data.base_offset, size);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
static void vfio_generic_window_quirk_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
|
|
if (ranges_overlap(addr, size,
|
|
quirk->data.address_offset, quirk->data.address_size)) {
|
|
|
|
if (addr != quirk->data.address_offset) {
|
|
hw_error("%s: offset write into address window: %s",
|
|
__func__, memory_region_name(&quirk->mem));
|
|
}
|
|
|
|
if ((data & ~quirk->data.address_mask) == quirk->data.address_match) {
|
|
quirk->data.flags |= quirk->data.write_flags |
|
|
quirk->data.read_flags;
|
|
quirk->data.address_val = data & quirk->data.address_mask;
|
|
} else {
|
|
quirk->data.flags &= ~(quirk->data.write_flags |
|
|
quirk->data.read_flags);
|
|
}
|
|
}
|
|
|
|
if (vfio_flags_enabled(quirk->data.flags, quirk->data.write_flags) &&
|
|
ranges_overlap(addr, size,
|
|
quirk->data.data_offset, quirk->data.data_size)) {
|
|
hwaddr offset = addr - quirk->data.data_offset;
|
|
|
|
if (!vfio_range_contained(addr, size, quirk->data.data_offset,
|
|
quirk->data.data_size)) {
|
|
hw_error("%s: window data write not fully contained: %s",
|
|
__func__, memory_region_name(&quirk->mem));
|
|
}
|
|
|
|
vfio_pci_write_config(&vdev->pdev,
|
|
quirk->data.address_val + offset, data, size);
|
|
trace_vfio_generic_window_quirk_write(memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name,
|
|
quirk->data.bar,
|
|
addr, data, size);
|
|
return;
|
|
}
|
|
|
|
vfio_region_write(&vdev->bars[quirk->data.bar].region,
|
|
addr + quirk->data.base_offset, data, size);
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_generic_window_quirk = {
|
|
.read = vfio_generic_window_quirk_read,
|
|
.write = vfio_generic_window_quirk_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static uint64_t vfio_generic_quirk_read(void *opaque,
|
|
hwaddr addr, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
|
|
hwaddr offset = quirk->data.address_match & ~TARGET_PAGE_MASK;
|
|
uint64_t data;
|
|
|
|
if (vfio_flags_enabled(quirk->data.flags, quirk->data.read_flags) &&
|
|
ranges_overlap(addr, size, offset, quirk->data.address_mask + 1)) {
|
|
if (!vfio_range_contained(addr, size, offset,
|
|
quirk->data.address_mask + 1)) {
|
|
hw_error("%s: read not fully contained: %s",
|
|
__func__, memory_region_name(&quirk->mem));
|
|
}
|
|
|
|
data = vfio_pci_read_config(&vdev->pdev, addr - offset, size);
|
|
|
|
trace_vfio_generic_quirk_read(memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name, quirk->data.bar,
|
|
addr + base, size, data);
|
|
} else {
|
|
data = vfio_region_read(&vdev->bars[quirk->data.bar].region,
|
|
addr + base, size);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
static void vfio_generic_quirk_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
|
|
hwaddr offset = quirk->data.address_match & ~TARGET_PAGE_MASK;
|
|
|
|
if (vfio_flags_enabled(quirk->data.flags, quirk->data.write_flags) &&
|
|
ranges_overlap(addr, size, offset, quirk->data.address_mask + 1)) {
|
|
if (!vfio_range_contained(addr, size, offset,
|
|
quirk->data.address_mask + 1)) {
|
|
hw_error("%s: write not fully contained: %s",
|
|
__func__, memory_region_name(&quirk->mem));
|
|
}
|
|
|
|
vfio_pci_write_config(&vdev->pdev, addr - offset, data, size);
|
|
|
|
trace_vfio_generic_quirk_write(memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name, quirk->data.bar,
|
|
addr + base, data, size);
|
|
} else {
|
|
vfio_region_write(&vdev->bars[quirk->data.bar].region,
|
|
addr + base, data, size);
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_generic_quirk = {
|
|
.read = vfio_generic_quirk_read,
|
|
.write = vfio_generic_quirk_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
#define PCI_VENDOR_ID_ATI 0x1002
|
|
|
|
/*
|
|
* Radeon HD cards (HD5450 & HD7850) report the upper byte of the I/O port BAR
|
|
* through VGA register 0x3c3. On newer cards, the I/O port BAR is always
|
|
* BAR4 (older cards like the X550 used BAR1, but we don't care to support
|
|
* those). Note that on bare metal, a read of 0x3c3 doesn't always return the
|
|
* I/O port BAR address. Originally this was coded to return the virtual BAR
|
|
* address only if the physical register read returns the actual BAR address,
|
|
* but users have reported greater success if we return the virtual address
|
|
* unconditionally.
|
|
*/
|
|
static uint64_t vfio_ati_3c3_quirk_read(void *opaque,
|
|
hwaddr addr, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
uint64_t data = vfio_pci_read_config(&vdev->pdev,
|
|
PCI_BASE_ADDRESS_0 + (4 * 4) + 1,
|
|
size);
|
|
trace_vfio_ati_3c3_quirk_read(data);
|
|
|
|
return data;
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_ati_3c3_quirk = {
|
|
.read = vfio_ati_3c3_quirk_read,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void vfio_vga_probe_ati_3c3_quirk(VFIOPCIDevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
|
|
if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* As long as the BAR is >= 256 bytes it will be aligned such that the
|
|
* lower byte is always zero. Filter out anything else, if it exists.
|
|
*/
|
|
if (!vdev->bars[4].ioport || vdev->bars[4].region.size < 256) {
|
|
return;
|
|
}
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_ati_3c3_quirk, quirk,
|
|
"vfio-ati-3c3-quirk", 1);
|
|
memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
|
|
3 /* offset 3 bytes from 0x3c0 */, &quirk->mem);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks,
|
|
quirk, next);
|
|
|
|
trace_vfio_vga_probe_ati_3c3_quirk(vdev->vbasedev.name);
|
|
}
|
|
|
|
/*
|
|
* Newer ATI/AMD devices, including HD5450 and HD7850, have a window to PCI
|
|
* config space through MMIO BAR2 at offset 0x4000. Nothing seems to access
|
|
* the MMIO space directly, but a window to this space is provided through
|
|
* I/O port BAR4. Offset 0x0 is the address register and offset 0x4 is the
|
|
* data register. When the address is programmed to a range of 0x4000-0x4fff
|
|
* PCI configuration space is available. Experimentation seems to indicate
|
|
* that only read-only access is provided, but we drop writes when the window
|
|
* is enabled to config space nonetheless.
|
|
*/
|
|
static void vfio_probe_ati_bar4_window_quirk(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
|
|
if (!vdev->has_vga || nr != 4 ||
|
|
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
|
|
return;
|
|
}
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
quirk->data.address_size = 4;
|
|
quirk->data.data_offset = 4;
|
|
quirk->data.data_size = 4;
|
|
quirk->data.address_match = 0x4000;
|
|
quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
|
|
quirk->data.bar = nr;
|
|
quirk->data.read_flags = quirk->data.write_flags = 1;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev),
|
|
&vfio_generic_window_quirk, quirk,
|
|
"vfio-ati-bar4-window-quirk", 8);
|
|
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
|
|
quirk->data.base_offset, &quirk->mem, 1);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
|
|
|
|
trace_vfio_probe_ati_bar4_window_quirk(vdev->vbasedev.name);
|
|
}
|
|
|
|
#define PCI_VENDOR_ID_REALTEK 0x10ec
|
|
|
|
/*
|
|
* RTL8168 devices have a backdoor that can access the MSI-X table. At BAR2
|
|
* offset 0x70 there is a dword data register, offset 0x74 is a dword address
|
|
* register. According to the Linux r8169 driver, the MSI-X table is addressed
|
|
* when the "type" portion of the address register is set to 0x1. This appears
|
|
* to be bits 16:30. Bit 31 is both a write indicator and some sort of
|
|
* "address latched" indicator. Bits 12:15 are a mask field, which we can
|
|
* ignore because the MSI-X table should always be accessed as a dword (full
|
|
* mask). Bits 0:11 is offset within the type.
|
|
*
|
|
* Example trace:
|
|
*
|
|
* Read from MSI-X table offset 0
|
|
* vfio: vfio_bar_write(0000:05:00.0:BAR2+0x74, 0x1f000, 4) // store read addr
|
|
* vfio: vfio_bar_read(0000:05:00.0:BAR2+0x74, 4) = 0x8001f000 // latch
|
|
* vfio: vfio_bar_read(0000:05:00.0:BAR2+0x70, 4) = 0xfee00398 // read data
|
|
*
|
|
* Write 0xfee00000 to MSI-X table offset 0
|
|
* vfio: vfio_bar_write(0000:05:00.0:BAR2+0x70, 0xfee00000, 4) // write data
|
|
* vfio: vfio_bar_write(0000:05:00.0:BAR2+0x74, 0x8001f000, 4) // do write
|
|
* vfio: vfio_bar_read(0000:05:00.0:BAR2+0x74, 4) = 0x1f000 // complete
|
|
*/
|
|
|
|
static uint64_t vfio_rtl8168_window_quirk_read(void *opaque,
|
|
hwaddr addr, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
|
|
switch (addr) {
|
|
case 4: /* address */
|
|
if (quirk->data.flags) {
|
|
trace_vfio_rtl8168_window_quirk_read_fake(
|
|
memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name);
|
|
|
|
return quirk->data.address_match ^ 0x80000000U;
|
|
}
|
|
break;
|
|
case 0: /* data */
|
|
if (quirk->data.flags) {
|
|
uint64_t val;
|
|
|
|
trace_vfio_rtl8168_window_quirk_read_table(
|
|
memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name);
|
|
|
|
if (!(vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX)) {
|
|
return 0;
|
|
}
|
|
|
|
memory_region_dispatch_read(&vdev->pdev.msix_table_mmio,
|
|
(hwaddr)(quirk->data.address_match
|
|
& 0xfff),
|
|
&val,
|
|
size,
|
|
MEMTXATTRS_UNSPECIFIED);
|
|
return val;
|
|
}
|
|
}
|
|
|
|
trace_vfio_rtl8168_window_quirk_read_direct(memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name);
|
|
|
|
return vfio_region_read(&vdev->bars[quirk->data.bar].region,
|
|
addr + 0x70, size);
|
|
}
|
|
|
|
static void vfio_rtl8168_window_quirk_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
|
|
switch (addr) {
|
|
case 4: /* address */
|
|
if ((data & 0x7fff0000) == 0x10000) {
|
|
if (data & 0x80000000U &&
|
|
vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX) {
|
|
|
|
trace_vfio_rtl8168_window_quirk_write_table(
|
|
memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name);
|
|
|
|
memory_region_dispatch_write(&vdev->pdev.msix_table_mmio,
|
|
(hwaddr)(data & 0xfff),
|
|
(uint64_t)quirk->data.address_mask,
|
|
size, MEMTXATTRS_UNSPECIFIED);
|
|
}
|
|
|
|
quirk->data.flags = 1;
|
|
quirk->data.address_match = data;
|
|
|
|
return;
|
|
}
|
|
quirk->data.flags = 0;
|
|
break;
|
|
case 0: /* data */
|
|
quirk->data.address_mask = data;
|
|
break;
|
|
}
|
|
|
|
trace_vfio_rtl8168_window_quirk_write_direct(
|
|
memory_region_name(&quirk->mem),
|
|
vdev->vbasedev.name);
|
|
|
|
vfio_region_write(&vdev->bars[quirk->data.bar].region,
|
|
addr + 0x70, data, size);
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_rtl8168_window_quirk = {
|
|
.read = vfio_rtl8168_window_quirk_read,
|
|
.write = vfio_rtl8168_window_quirk_write,
|
|
.valid = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
.unaligned = false,
|
|
},
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void vfio_probe_rtl8168_bar2_window_quirk(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
|
|
if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_REALTEK ||
|
|
pci_get_word(pdev->config + PCI_DEVICE_ID) != 0x8168 || nr != 2) {
|
|
return;
|
|
}
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
quirk->data.bar = nr;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_rtl8168_window_quirk,
|
|
quirk, "vfio-rtl8168-window-quirk", 8);
|
|
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
|
|
0x70, &quirk->mem, 1);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
|
|
|
|
trace_vfio_probe_rtl8168_bar2_window_quirk(vdev->vbasedev.name);
|
|
}
|
|
/*
|
|
* Trap the BAR2 MMIO window to config space as well.
|
|
*/
|
|
static void vfio_probe_ati_bar2_4000_quirk(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
|
|
/* Only enable on newer devices where BAR2 is 64bit */
|
|
if (!vdev->has_vga || nr != 2 || !vdev->bars[2].mem64 ||
|
|
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
|
|
return;
|
|
}
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
|
|
quirk->data.address_match = 0x4000;
|
|
quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
|
|
quirk->data.bar = nr;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_generic_quirk, quirk,
|
|
"vfio-ati-bar2-4000-quirk",
|
|
TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
|
|
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
|
|
quirk->data.address_match & TARGET_PAGE_MASK,
|
|
&quirk->mem, 1);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
|
|
|
|
trace_vfio_probe_ati_bar2_4000_quirk(vdev->vbasedev.name);
|
|
}
|
|
|
|
/*
|
|
* Older ATI/AMD cards like the X550 have a similar window to that above.
|
|
* I/O port BAR1 provides a window to a mirror of PCI config space located
|
|
* in BAR2 at offset 0xf00. We don't care to support such older cards, but
|
|
* note it for future reference.
|
|
*/
|
|
|
|
#define PCI_VENDOR_ID_NVIDIA 0x10de
|
|
|
|
/*
|
|
* Nvidia has several different methods to get to config space, the
|
|
* nouveu project has several of these documented here:
|
|
* https://github.com/pathscale/envytools/tree/master/hwdocs
|
|
*
|
|
* The first quirk is actually not documented in envytools and is found
|
|
* on 10de:01d1 (NVIDIA Corporation G72 [GeForce 7300 LE]). This is an
|
|
* NV46 chipset. The backdoor uses the legacy VGA I/O ports to access
|
|
* the mirror of PCI config space found at BAR0 offset 0x1800. The access
|
|
* sequence first writes 0x338 to I/O port 0x3d4. The target offset is
|
|
* then written to 0x3d0. Finally 0x538 is written for a read and 0x738
|
|
* is written for a write to 0x3d4. The BAR0 offset is then accessible
|
|
* through 0x3d0. This quirk doesn't seem to be necessary on newer cards
|
|
* that use the I/O port BAR5 window but it doesn't hurt to leave it.
|
|
*/
|
|
enum {
|
|
NV_3D0_NONE = 0,
|
|
NV_3D0_SELECT,
|
|
NV_3D0_WINDOW,
|
|
NV_3D0_READ,
|
|
NV_3D0_WRITE,
|
|
};
|
|
|
|
static uint64_t vfio_nvidia_3d0_quirk_read(void *opaque,
|
|
hwaddr addr, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
uint64_t data = vfio_vga_read(&vdev->vga.region[QEMU_PCI_VGA_IO_HI],
|
|
addr + quirk->data.base_offset, size);
|
|
|
|
if (quirk->data.flags == NV_3D0_READ && addr == quirk->data.data_offset) {
|
|
data = vfio_pci_read_config(pdev, quirk->data.address_val, size);
|
|
trace_vfio_nvidia_3d0_quirk_read(size, data);
|
|
}
|
|
|
|
quirk->data.flags = NV_3D0_NONE;
|
|
|
|
return data;
|
|
}
|
|
|
|
static void vfio_nvidia_3d0_quirk_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
|
|
switch (quirk->data.flags) {
|
|
case NV_3D0_NONE:
|
|
if (addr == quirk->data.address_offset && data == 0x338) {
|
|
quirk->data.flags = NV_3D0_SELECT;
|
|
}
|
|
break;
|
|
case NV_3D0_SELECT:
|
|
quirk->data.flags = NV_3D0_NONE;
|
|
if (addr == quirk->data.data_offset &&
|
|
(data & ~quirk->data.address_mask) == quirk->data.address_match) {
|
|
quirk->data.flags = NV_3D0_WINDOW;
|
|
quirk->data.address_val = data & quirk->data.address_mask;
|
|
}
|
|
break;
|
|
case NV_3D0_WINDOW:
|
|
quirk->data.flags = NV_3D0_NONE;
|
|
if (addr == quirk->data.address_offset) {
|
|
if (data == 0x538) {
|
|
quirk->data.flags = NV_3D0_READ;
|
|
} else if (data == 0x738) {
|
|
quirk->data.flags = NV_3D0_WRITE;
|
|
}
|
|
}
|
|
break;
|
|
case NV_3D0_WRITE:
|
|
quirk->data.flags = NV_3D0_NONE;
|
|
if (addr == quirk->data.data_offset) {
|
|
vfio_pci_write_config(pdev, quirk->data.address_val, data, size);
|
|
trace_vfio_nvidia_3d0_quirk_write(data, size);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
|
|
vfio_vga_write(&vdev->vga.region[QEMU_PCI_VGA_IO_HI],
|
|
addr + quirk->data.base_offset, data, size);
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_nvidia_3d0_quirk = {
|
|
.read = vfio_nvidia_3d0_quirk_read,
|
|
.write = vfio_nvidia_3d0_quirk_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void vfio_vga_probe_nvidia_3d0_quirk(VFIOPCIDevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
|
|
if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA ||
|
|
!vdev->bars[1].region.size) {
|
|
return;
|
|
}
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
quirk->data.base_offset = 0x10;
|
|
quirk->data.address_offset = 4;
|
|
quirk->data.address_size = 2;
|
|
quirk->data.address_match = 0x1800;
|
|
quirk->data.address_mask = PCI_CONFIG_SPACE_SIZE - 1;
|
|
quirk->data.data_offset = 0;
|
|
quirk->data.data_size = 4;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_nvidia_3d0_quirk,
|
|
quirk, "vfio-nvidia-3d0-quirk", 6);
|
|
memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
|
|
quirk->data.base_offset, &quirk->mem);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks,
|
|
quirk, next);
|
|
|
|
trace_vfio_vga_probe_nvidia_3d0_quirk(vdev->vbasedev.name);
|
|
}
|
|
|
|
/*
|
|
* The second quirk is documented in envytools. The I/O port BAR5 is just
|
|
* a set of address/data ports to the MMIO BARs. The BAR we care about is
|
|
* again BAR0. This backdoor is apparently a bit newer than the one above
|
|
* so we need to not only trap 256 bytes @0x1800, but all of PCI config
|
|
* space, including extended space is available at the 4k @0x88000.
|
|
*/
|
|
enum {
|
|
NV_BAR5_ADDRESS = 0x1,
|
|
NV_BAR5_ENABLE = 0x2,
|
|
NV_BAR5_MASTER = 0x4,
|
|
NV_BAR5_VALID = 0x7,
|
|
};
|
|
|
|
static void vfio_nvidia_bar5_window_quirk_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
|
|
switch (addr) {
|
|
case 0x0:
|
|
if (data & 0x1) {
|
|
quirk->data.flags |= NV_BAR5_MASTER;
|
|
} else {
|
|
quirk->data.flags &= ~NV_BAR5_MASTER;
|
|
}
|
|
break;
|
|
case 0x4:
|
|
if (data & 0x1) {
|
|
quirk->data.flags |= NV_BAR5_ENABLE;
|
|
} else {
|
|
quirk->data.flags &= ~NV_BAR5_ENABLE;
|
|
}
|
|
break;
|
|
case 0x8:
|
|
if (quirk->data.flags & NV_BAR5_MASTER) {
|
|
if ((data & ~0xfff) == 0x88000) {
|
|
quirk->data.flags |= NV_BAR5_ADDRESS;
|
|
quirk->data.address_val = data & 0xfff;
|
|
} else if ((data & ~0xff) == 0x1800) {
|
|
quirk->data.flags |= NV_BAR5_ADDRESS;
|
|
quirk->data.address_val = data & 0xff;
|
|
} else {
|
|
quirk->data.flags &= ~NV_BAR5_ADDRESS;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
vfio_generic_window_quirk_write(opaque, addr, data, size);
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_nvidia_bar5_window_quirk = {
|
|
.read = vfio_generic_window_quirk_read,
|
|
.write = vfio_nvidia_bar5_window_quirk_write,
|
|
.valid.min_access_size = 4,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void vfio_probe_nvidia_bar5_window_quirk(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
|
|
if (!vdev->has_vga || nr != 5 ||
|
|
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
|
|
return;
|
|
}
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
quirk->data.read_flags = quirk->data.write_flags = NV_BAR5_VALID;
|
|
quirk->data.address_offset = 0x8;
|
|
quirk->data.address_size = 0; /* actually 4, but avoids generic code */
|
|
quirk->data.data_offset = 0xc;
|
|
quirk->data.data_size = 4;
|
|
quirk->data.bar = nr;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev),
|
|
&vfio_nvidia_bar5_window_quirk, quirk,
|
|
"vfio-nvidia-bar5-window-quirk", 16);
|
|
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
|
|
0, &quirk->mem, 1);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
|
|
|
|
trace_vfio_probe_nvidia_bar5_window_quirk(vdev->vbasedev.name);
|
|
}
|
|
|
|
static void vfio_nvidia_88000_quirk_write(void *opaque, hwaddr addr,
|
|
uint64_t data, unsigned size)
|
|
{
|
|
VFIOQuirk *quirk = opaque;
|
|
VFIOPCIDevice *vdev = quirk->vdev;
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
|
|
|
|
vfio_generic_quirk_write(opaque, addr, data, size);
|
|
|
|
/*
|
|
* Nvidia seems to acknowledge MSI interrupts by writing 0xff to the
|
|
* MSI capability ID register. Both the ID and next register are
|
|
* read-only, so we allow writes covering either of those to real hw.
|
|
* NB - only fixed for the 0x88000 MMIO window.
|
|
*/
|
|
if ((pdev->cap_present & QEMU_PCI_CAP_MSI) &&
|
|
vfio_range_contained(addr, size, pdev->msi_cap, PCI_MSI_FLAGS)) {
|
|
vfio_region_write(&vdev->bars[quirk->data.bar].region,
|
|
addr + base, data, size);
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps vfio_nvidia_88000_quirk = {
|
|
.read = vfio_generic_quirk_read,
|
|
.write = vfio_nvidia_88000_quirk_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
/*
|
|
* Finally, BAR0 itself. We want to redirect any accesses to either
|
|
* 0x1800 or 0x88000 through the PCI config space access functions.
|
|
*
|
|
* NB - quirk at a page granularity or else they don't seem to work when
|
|
* BARs are mmap'd
|
|
*
|
|
* Here's offset 0x88000...
|
|
*/
|
|
static void vfio_probe_nvidia_bar0_88000_quirk(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
uint16_t vendor, class;
|
|
|
|
vendor = pci_get_word(pdev->config + PCI_VENDOR_ID);
|
|
class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
|
|
|
|
if (nr != 0 || vendor != PCI_VENDOR_ID_NVIDIA ||
|
|
class != PCI_CLASS_DISPLAY_VGA) {
|
|
return;
|
|
}
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
|
|
quirk->data.address_match = 0x88000;
|
|
quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
|
|
quirk->data.bar = nr;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_nvidia_88000_quirk,
|
|
quirk, "vfio-nvidia-bar0-88000-quirk",
|
|
TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
|
|
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
|
|
quirk->data.address_match & TARGET_PAGE_MASK,
|
|
&quirk->mem, 1);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
|
|
|
|
trace_vfio_probe_nvidia_bar0_88000_quirk(vdev->vbasedev.name);
|
|
}
|
|
|
|
/*
|
|
* And here's the same for BAR0 offset 0x1800...
|
|
*/
|
|
static void vfio_probe_nvidia_bar0_1800_quirk(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
VFIOQuirk *quirk;
|
|
|
|
if (!vdev->has_vga || nr != 0 ||
|
|
pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
|
|
return;
|
|
}
|
|
|
|
/* Log the chipset ID */
|
|
trace_vfio_probe_nvidia_bar0_1800_quirk_id(
|
|
(unsigned int)(vfio_region_read(&vdev->bars[0].region, 0, 4) >> 20)
|
|
& 0xff);
|
|
|
|
quirk = g_malloc0(sizeof(*quirk));
|
|
quirk->vdev = vdev;
|
|
quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
|
|
quirk->data.address_match = 0x1800;
|
|
quirk->data.address_mask = PCI_CONFIG_SPACE_SIZE - 1;
|
|
quirk->data.bar = nr;
|
|
|
|
memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_generic_quirk, quirk,
|
|
"vfio-nvidia-bar0-1800-quirk",
|
|
TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
|
|
memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem,
|
|
quirk->data.address_match & TARGET_PAGE_MASK,
|
|
&quirk->mem, 1);
|
|
|
|
QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
|
|
|
|
trace_vfio_probe_nvidia_bar0_1800_quirk(vdev->vbasedev.name);
|
|
}
|
|
|
|
/*
|
|
* TODO - Some Nvidia devices provide config access to their companion HDA
|
|
* device and even to their parent bridge via these config space mirrors.
|
|
* Add quirks for those regions.
|
|
*/
|
|
|
|
/*
|
|
* Common quirk probe entry points.
|
|
*/
|
|
static void vfio_vga_quirk_setup(VFIOPCIDevice *vdev)
|
|
{
|
|
vfio_vga_probe_ati_3c3_quirk(vdev);
|
|
vfio_vga_probe_nvidia_3d0_quirk(vdev);
|
|
}
|
|
|
|
static void vfio_vga_quirk_teardown(VFIOPCIDevice *vdev)
|
|
{
|
|
VFIOQuirk *quirk;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vdev->vga.region); i++) {
|
|
QLIST_FOREACH(quirk, &vdev->vga.region[i].quirks, next) {
|
|
memory_region_del_subregion(&vdev->vga.region[i].mem, &quirk->mem);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void vfio_vga_quirk_free(VFIOPCIDevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vdev->vga.region); i++) {
|
|
while (!QLIST_EMPTY(&vdev->vga.region[i].quirks)) {
|
|
VFIOQuirk *quirk = QLIST_FIRST(&vdev->vga.region[i].quirks);
|
|
object_unparent(OBJECT(&quirk->mem));
|
|
QLIST_REMOVE(quirk, next);
|
|
g_free(quirk);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
vfio_probe_ati_bar4_window_quirk(vdev, nr);
|
|
vfio_probe_ati_bar2_4000_quirk(vdev, nr);
|
|
vfio_probe_nvidia_bar5_window_quirk(vdev, nr);
|
|
vfio_probe_nvidia_bar0_88000_quirk(vdev, nr);
|
|
vfio_probe_nvidia_bar0_1800_quirk(vdev, nr);
|
|
vfio_probe_rtl8168_bar2_window_quirk(vdev, nr);
|
|
}
|
|
|
|
static void vfio_bar_quirk_teardown(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
VFIOBAR *bar = &vdev->bars[nr];
|
|
VFIOQuirk *quirk;
|
|
|
|
QLIST_FOREACH(quirk, &bar->quirks, next) {
|
|
memory_region_del_subregion(&bar->region.mem, &quirk->mem);
|
|
}
|
|
}
|
|
|
|
static void vfio_bar_quirk_free(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
VFIOBAR *bar = &vdev->bars[nr];
|
|
|
|
while (!QLIST_EMPTY(&bar->quirks)) {
|
|
VFIOQuirk *quirk = QLIST_FIRST(&bar->quirks);
|
|
object_unparent(OBJECT(&quirk->mem));
|
|
QLIST_REMOVE(quirk, next);
|
|
g_free(quirk);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* PCI config space
|
|
*/
|
|
static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
|
|
{
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
|
|
uint32_t emu_bits = 0, emu_val = 0, phys_val = 0, val;
|
|
|
|
memcpy(&emu_bits, vdev->emulated_config_bits + addr, len);
|
|
emu_bits = le32_to_cpu(emu_bits);
|
|
|
|
if (emu_bits) {
|
|
emu_val = pci_default_read_config(pdev, addr, len);
|
|
}
|
|
|
|
if (~emu_bits & (0xffffffffU >> (32 - len * 8))) {
|
|
ssize_t ret;
|
|
|
|
ret = pread(vdev->vbasedev.fd, &phys_val, len,
|
|
vdev->config_offset + addr);
|
|
if (ret != len) {
|
|
error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x) failed: %m",
|
|
__func__, vdev->host.domain, vdev->host.bus,
|
|
vdev->host.slot, vdev->host.function, addr, len);
|
|
return -errno;
|
|
}
|
|
phys_val = le32_to_cpu(phys_val);
|
|
}
|
|
|
|
val = (emu_val & emu_bits) | (phys_val & ~emu_bits);
|
|
|
|
trace_vfio_pci_read_config(vdev->vbasedev.name, addr, len, val);
|
|
|
|
return val;
|
|
}
|
|
|
|
static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr,
|
|
uint32_t val, int len)
|
|
{
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
|
|
uint32_t val_le = cpu_to_le32(val);
|
|
|
|
trace_vfio_pci_write_config(vdev->vbasedev.name, addr, val, len);
|
|
|
|
/* Write everything to VFIO, let it filter out what we can't write */
|
|
if (pwrite(vdev->vbasedev.fd, &val_le, len, vdev->config_offset + addr)
|
|
!= len) {
|
|
error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x, 0x%x) failed: %m",
|
|
__func__, vdev->host.domain, vdev->host.bus,
|
|
vdev->host.slot, vdev->host.function, addr, val, len);
|
|
}
|
|
|
|
/* MSI/MSI-X Enabling/Disabling */
|
|
if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
|
|
ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) {
|
|
int is_enabled, was_enabled = msi_enabled(pdev);
|
|
|
|
pci_default_write_config(pdev, addr, val, len);
|
|
|
|
is_enabled = msi_enabled(pdev);
|
|
|
|
if (!was_enabled) {
|
|
if (is_enabled) {
|
|
vfio_enable_msi(vdev);
|
|
}
|
|
} else {
|
|
if (!is_enabled) {
|
|
vfio_disable_msi(vdev);
|
|
} else {
|
|
vfio_update_msi(vdev);
|
|
}
|
|
}
|
|
} else if (pdev->cap_present & QEMU_PCI_CAP_MSIX &&
|
|
ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) {
|
|
int is_enabled, was_enabled = msix_enabled(pdev);
|
|
|
|
pci_default_write_config(pdev, addr, val, len);
|
|
|
|
is_enabled = msix_enabled(pdev);
|
|
|
|
if (!was_enabled && is_enabled) {
|
|
vfio_enable_msix(vdev);
|
|
} else if (was_enabled && !is_enabled) {
|
|
vfio_disable_msix(vdev);
|
|
}
|
|
} else {
|
|
/* Write everything to QEMU to keep emulated bits correct */
|
|
pci_default_write_config(pdev, addr, val, len);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Interrupt setup
|
|
*/
|
|
static void vfio_disable_interrupts(VFIOPCIDevice *vdev)
|
|
{
|
|
/*
|
|
* More complicated than it looks. Disabling MSI/X transitions the
|
|
* device to INTx mode (if supported). Therefore we need to first
|
|
* disable MSI/X and then cleanup by disabling INTx.
|
|
*/
|
|
if (vdev->interrupt == VFIO_INT_MSIX) {
|
|
vfio_disable_msix(vdev);
|
|
} else if (vdev->interrupt == VFIO_INT_MSI) {
|
|
vfio_disable_msi(vdev);
|
|
}
|
|
|
|
if (vdev->interrupt == VFIO_INT_INTx) {
|
|
vfio_disable_intx(vdev);
|
|
}
|
|
}
|
|
|
|
static int vfio_setup_msi(VFIOPCIDevice *vdev, int pos)
|
|
{
|
|
uint16_t ctrl;
|
|
bool msi_64bit, msi_maskbit;
|
|
int ret, entries;
|
|
|
|
if (pread(vdev->vbasedev.fd, &ctrl, sizeof(ctrl),
|
|
vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
|
return -errno;
|
|
}
|
|
ctrl = le16_to_cpu(ctrl);
|
|
|
|
msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT);
|
|
msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT);
|
|
entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1);
|
|
|
|
trace_vfio_setup_msi(vdev->vbasedev.name, pos);
|
|
|
|
ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit);
|
|
if (ret < 0) {
|
|
if (ret == -ENOTSUP) {
|
|
return 0;
|
|
}
|
|
error_report("vfio: msi_init failed");
|
|
return ret;
|
|
}
|
|
vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We don't have any control over how pci_add_capability() inserts
|
|
* capabilities into the chain. In order to setup MSI-X we need a
|
|
* MemoryRegion for the BAR. In order to setup the BAR and not
|
|
* attempt to mmap the MSI-X table area, which VFIO won't allow, we
|
|
* need to first look for where the MSI-X table lives. So we
|
|
* unfortunately split MSI-X setup across two functions.
|
|
*/
|
|
static int vfio_early_setup_msix(VFIOPCIDevice *vdev)
|
|
{
|
|
uint8_t pos;
|
|
uint16_t ctrl;
|
|
uint32_t table, pba;
|
|
int fd = vdev->vbasedev.fd;
|
|
|
|
pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
|
|
if (!pos) {
|
|
return 0;
|
|
}
|
|
|
|
if (pread(fd, &ctrl, sizeof(ctrl),
|
|
vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
|
|
return -errno;
|
|
}
|
|
|
|
if (pread(fd, &table, sizeof(table),
|
|
vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
|
|
return -errno;
|
|
}
|
|
|
|
if (pread(fd, &pba, sizeof(pba),
|
|
vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
|
|
return -errno;
|
|
}
|
|
|
|
ctrl = le16_to_cpu(ctrl);
|
|
table = le32_to_cpu(table);
|
|
pba = le32_to_cpu(pba);
|
|
|
|
vdev->msix = g_malloc0(sizeof(*(vdev->msix)));
|
|
vdev->msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
|
|
vdev->msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
|
|
|
|
/*
|
|
* Test the size of the pba_offset variable and catch if it extends outside
|
|
* of the specified BAR. If it is the case, we need to apply a hardware
|
|
* specific quirk if the device is known or we have a broken configuration.
|
|
*/
|
|
if (vdev->msix->pba_offset >=
|
|
vdev->bars[vdev->msix->pba_bar].region.size) {
|
|
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
uint16_t vendor = pci_get_word(pdev->config + PCI_VENDOR_ID);
|
|
uint16_t device = pci_get_word(pdev->config + PCI_DEVICE_ID);
|
|
|
|
/*
|
|
* Chelsio T5 Virtual Function devices are encoded as 0x58xx for T5
|
|
* adapters. The T5 hardware returns an incorrect value of 0x8000 for
|
|
* the VF PBA offset while the BAR itself is only 8k. The correct value
|
|
* is 0x1000, so we hard code that here.
|
|
*/
|
|
if (vendor == PCI_VENDOR_ID_CHELSIO && (device & 0xff00) == 0x5800) {
|
|
vdev->msix->pba_offset = 0x1000;
|
|
} else {
|
|
error_report("vfio: Hardware reports invalid configuration, "
|
|
"MSIX PBA outside of specified BAR");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
trace_vfio_early_setup_msix(vdev->vbasedev.name, pos,
|
|
vdev->msix->table_bar,
|
|
vdev->msix->table_offset,
|
|
vdev->msix->entries);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_setup_msix(VFIOPCIDevice *vdev, int pos)
|
|
{
|
|
int ret;
|
|
|
|
ret = msix_init(&vdev->pdev, vdev->msix->entries,
|
|
&vdev->bars[vdev->msix->table_bar].region.mem,
|
|
vdev->msix->table_bar, vdev->msix->table_offset,
|
|
&vdev->bars[vdev->msix->pba_bar].region.mem,
|
|
vdev->msix->pba_bar, vdev->msix->pba_offset, pos);
|
|
if (ret < 0) {
|
|
if (ret == -ENOTSUP) {
|
|
return 0;
|
|
}
|
|
error_report("vfio: msix_init failed");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vfio_teardown_msi(VFIOPCIDevice *vdev)
|
|
{
|
|
msi_uninit(&vdev->pdev);
|
|
|
|
if (vdev->msix) {
|
|
msix_uninit(&vdev->pdev,
|
|
&vdev->bars[vdev->msix->table_bar].region.mem,
|
|
&vdev->bars[vdev->msix->pba_bar].region.mem);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Resource setup
|
|
*/
|
|
static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_SLOT; i++) {
|
|
VFIOBAR *bar = &vdev->bars[i];
|
|
|
|
if (!bar->region.size) {
|
|
continue;
|
|
}
|
|
|
|
memory_region_set_enabled(&bar->region.mmap_mem, enabled);
|
|
if (vdev->msix && vdev->msix->table_bar == i) {
|
|
memory_region_set_enabled(&vdev->msix->mmap_mem, enabled);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void vfio_unregister_bar(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
VFIOBAR *bar = &vdev->bars[nr];
|
|
|
|
if (!bar->region.size) {
|
|
return;
|
|
}
|
|
|
|
vfio_bar_quirk_teardown(vdev, nr);
|
|
|
|
memory_region_del_subregion(&bar->region.mem, &bar->region.mmap_mem);
|
|
|
|
if (vdev->msix && vdev->msix->table_bar == nr) {
|
|
memory_region_del_subregion(&bar->region.mem, &vdev->msix->mmap_mem);
|
|
}
|
|
}
|
|
|
|
static void vfio_unmap_bar(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
VFIOBAR *bar = &vdev->bars[nr];
|
|
|
|
if (!bar->region.size) {
|
|
return;
|
|
}
|
|
|
|
vfio_bar_quirk_free(vdev, nr);
|
|
|
|
munmap(bar->region.mmap, memory_region_size(&bar->region.mmap_mem));
|
|
|
|
if (vdev->msix && vdev->msix->table_bar == nr) {
|
|
munmap(vdev->msix->mmap, memory_region_size(&vdev->msix->mmap_mem));
|
|
}
|
|
}
|
|
|
|
static void vfio_map_bar(VFIOPCIDevice *vdev, int nr)
|
|
{
|
|
VFIOBAR *bar = &vdev->bars[nr];
|
|
uint64_t size = bar->region.size;
|
|
char name[64];
|
|
uint32_t pci_bar;
|
|
uint8_t type;
|
|
int ret;
|
|
|
|
/* Skip both unimplemented BARs and the upper half of 64bit BARS. */
|
|
if (!size) {
|
|
return;
|
|
}
|
|
|
|
snprintf(name, sizeof(name), "VFIO %04x:%02x:%02x.%x BAR %d",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function, nr);
|
|
|
|
/* Determine what type of BAR this is for registration */
|
|
ret = pread(vdev->vbasedev.fd, &pci_bar, sizeof(pci_bar),
|
|
vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
|
|
if (ret != sizeof(pci_bar)) {
|
|
error_report("vfio: Failed to read BAR %d (%m)", nr);
|
|
return;
|
|
}
|
|
|
|
pci_bar = le32_to_cpu(pci_bar);
|
|
bar->ioport = (pci_bar & PCI_BASE_ADDRESS_SPACE_IO);
|
|
bar->mem64 = bar->ioport ? 0 : (pci_bar & PCI_BASE_ADDRESS_MEM_TYPE_64);
|
|
type = pci_bar & (bar->ioport ? ~PCI_BASE_ADDRESS_IO_MASK :
|
|
~PCI_BASE_ADDRESS_MEM_MASK);
|
|
|
|
/* A "slow" read/write mapping underlies all BARs */
|
|
memory_region_init_io(&bar->region.mem, OBJECT(vdev), &vfio_region_ops,
|
|
bar, name, size);
|
|
pci_register_bar(&vdev->pdev, nr, type, &bar->region.mem);
|
|
|
|
/*
|
|
* We can't mmap areas overlapping the MSIX vector table, so we
|
|
* potentially insert a direct-mapped subregion before and after it.
|
|
*/
|
|
if (vdev->msix && vdev->msix->table_bar == nr) {
|
|
size = vdev->msix->table_offset & qemu_real_host_page_mask;
|
|
}
|
|
|
|
strncat(name, " mmap", sizeof(name) - strlen(name) - 1);
|
|
if (vfio_mmap_region(OBJECT(vdev), &bar->region, &bar->region.mem,
|
|
&bar->region.mmap_mem, &bar->region.mmap,
|
|
size, 0, name)) {
|
|
error_report("%s unsupported. Performance may be slow", name);
|
|
}
|
|
|
|
if (vdev->msix && vdev->msix->table_bar == nr) {
|
|
uint64_t start;
|
|
|
|
start = REAL_HOST_PAGE_ALIGN((uint64_t)vdev->msix->table_offset +
|
|
(vdev->msix->entries *
|
|
PCI_MSIX_ENTRY_SIZE));
|
|
|
|
size = start < bar->region.size ? bar->region.size - start : 0;
|
|
strncat(name, " msix-hi", sizeof(name) - strlen(name) - 1);
|
|
/* VFIOMSIXInfo contains another MemoryRegion for this mapping */
|
|
if (vfio_mmap_region(OBJECT(vdev), &bar->region, &bar->region.mem,
|
|
&vdev->msix->mmap_mem,
|
|
&vdev->msix->mmap, size, start, name)) {
|
|
error_report("%s unsupported. Performance may be slow", name);
|
|
}
|
|
}
|
|
|
|
vfio_bar_quirk_setup(vdev, nr);
|
|
}
|
|
|
|
static void vfio_map_bars(VFIOPCIDevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_SLOT; i++) {
|
|
vfio_map_bar(vdev, i);
|
|
}
|
|
|
|
if (vdev->has_vga) {
|
|
memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_MEM].mem,
|
|
OBJECT(vdev), &vfio_vga_ops,
|
|
&vdev->vga.region[QEMU_PCI_VGA_MEM],
|
|
"vfio-vga-mmio@0xa0000",
|
|
QEMU_PCI_VGA_MEM_SIZE);
|
|
memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem,
|
|
OBJECT(vdev), &vfio_vga_ops,
|
|
&vdev->vga.region[QEMU_PCI_VGA_IO_LO],
|
|
"vfio-vga-io@0x3b0",
|
|
QEMU_PCI_VGA_IO_LO_SIZE);
|
|
memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
|
|
OBJECT(vdev), &vfio_vga_ops,
|
|
&vdev->vga.region[QEMU_PCI_VGA_IO_HI],
|
|
"vfio-vga-io@0x3c0",
|
|
QEMU_PCI_VGA_IO_HI_SIZE);
|
|
|
|
pci_register_vga(&vdev->pdev, &vdev->vga.region[QEMU_PCI_VGA_MEM].mem,
|
|
&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem,
|
|
&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem);
|
|
vfio_vga_quirk_setup(vdev);
|
|
}
|
|
}
|
|
|
|
static void vfio_unregister_bars(VFIOPCIDevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_SLOT; i++) {
|
|
vfio_unregister_bar(vdev, i);
|
|
}
|
|
|
|
if (vdev->has_vga) {
|
|
vfio_vga_quirk_teardown(vdev);
|
|
pci_unregister_vga(&vdev->pdev);
|
|
}
|
|
}
|
|
|
|
static void vfio_unmap_bars(VFIOPCIDevice *vdev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PCI_ROM_SLOT; i++) {
|
|
vfio_unmap_bar(vdev, i);
|
|
}
|
|
|
|
if (vdev->has_vga) {
|
|
vfio_vga_quirk_free(vdev);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* General setup
|
|
*/
|
|
static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
|
|
{
|
|
uint8_t tmp, next = 0xff;
|
|
|
|
for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
|
|
tmp = pdev->config[tmp + 1]) {
|
|
if (tmp > pos && tmp < next) {
|
|
next = tmp;
|
|
}
|
|
}
|
|
|
|
return next - pos;
|
|
}
|
|
|
|
static void vfio_set_word_bits(uint8_t *buf, uint16_t val, uint16_t mask)
|
|
{
|
|
pci_set_word(buf, (pci_get_word(buf) & ~mask) | val);
|
|
}
|
|
|
|
static void vfio_add_emulated_word(VFIOPCIDevice *vdev, int pos,
|
|
uint16_t val, uint16_t mask)
|
|
{
|
|
vfio_set_word_bits(vdev->pdev.config + pos, val, mask);
|
|
vfio_set_word_bits(vdev->pdev.wmask + pos, ~mask, mask);
|
|
vfio_set_word_bits(vdev->emulated_config_bits + pos, mask, mask);
|
|
}
|
|
|
|
static void vfio_set_long_bits(uint8_t *buf, uint32_t val, uint32_t mask)
|
|
{
|
|
pci_set_long(buf, (pci_get_long(buf) & ~mask) | val);
|
|
}
|
|
|
|
static void vfio_add_emulated_long(VFIOPCIDevice *vdev, int pos,
|
|
uint32_t val, uint32_t mask)
|
|
{
|
|
vfio_set_long_bits(vdev->pdev.config + pos, val, mask);
|
|
vfio_set_long_bits(vdev->pdev.wmask + pos, ~mask, mask);
|
|
vfio_set_long_bits(vdev->emulated_config_bits + pos, mask, mask);
|
|
}
|
|
|
|
static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size)
|
|
{
|
|
uint16_t flags;
|
|
uint8_t type;
|
|
|
|
flags = pci_get_word(vdev->pdev.config + pos + PCI_CAP_FLAGS);
|
|
type = (flags & PCI_EXP_FLAGS_TYPE) >> 4;
|
|
|
|
if (type != PCI_EXP_TYPE_ENDPOINT &&
|
|
type != PCI_EXP_TYPE_LEG_END &&
|
|
type != PCI_EXP_TYPE_RC_END) {
|
|
|
|
error_report("vfio: Assignment of PCIe type 0x%x "
|
|
"devices is not currently supported", type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!pci_bus_is_express(vdev->pdev.bus)) {
|
|
/*
|
|
* Use express capability as-is on PCI bus. It doesn't make much
|
|
* sense to even expose, but some drivers (ex. tg3) depend on it
|
|
* and guests don't seem to be particular about it. We'll need
|
|
* to revist this or force express devices to express buses if we
|
|
* ever expose an IOMMU to the guest.
|
|
*/
|
|
} else if (pci_bus_is_root(vdev->pdev.bus)) {
|
|
/*
|
|
* On a Root Complex bus Endpoints become Root Complex Integrated
|
|
* Endpoints, which changes the type and clears the LNK & LNK2 fields.
|
|
*/
|
|
if (type == PCI_EXP_TYPE_ENDPOINT) {
|
|
vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
|
|
PCI_EXP_TYPE_RC_END << 4,
|
|
PCI_EXP_FLAGS_TYPE);
|
|
|
|
/* Link Capabilities, Status, and Control goes away */
|
|
if (size > PCI_EXP_LNKCTL) {
|
|
vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP, 0, ~0);
|
|
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
|
|
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA, 0, ~0);
|
|
|
|
#ifndef PCI_EXP_LNKCAP2
|
|
#define PCI_EXP_LNKCAP2 44
|
|
#endif
|
|
#ifndef PCI_EXP_LNKSTA2
|
|
#define PCI_EXP_LNKSTA2 50
|
|
#endif
|
|
/* Link 2 Capabilities, Status, and Control goes away */
|
|
if (size > PCI_EXP_LNKCAP2) {
|
|
vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP2, 0, ~0);
|
|
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL2, 0, ~0);
|
|
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA2, 0, ~0);
|
|
}
|
|
}
|
|
|
|
} else if (type == PCI_EXP_TYPE_LEG_END) {
|
|
/*
|
|
* Legacy endpoints don't belong on the root complex. Windows
|
|
* seems to be happier with devices if we skip the capability.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
} else {
|
|
/*
|
|
* Convert Root Complex Integrated Endpoints to regular endpoints.
|
|
* These devices don't support LNK/LNK2 capabilities, so make them up.
|
|
*/
|
|
if (type == PCI_EXP_TYPE_RC_END) {
|
|
vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
|
|
PCI_EXP_TYPE_ENDPOINT << 4,
|
|
PCI_EXP_FLAGS_TYPE);
|
|
vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP,
|
|
PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25, ~0);
|
|
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
|
|
}
|
|
|
|
/* Mark the Link Status bits as emulated to allow virtual negotiation */
|
|
vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA,
|
|
pci_get_word(vdev->pdev.config + pos +
|
|
PCI_EXP_LNKSTA),
|
|
PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
|
|
}
|
|
|
|
pos = pci_add_capability(&vdev->pdev, PCI_CAP_ID_EXP, pos, size);
|
|
if (pos >= 0) {
|
|
vdev->pdev.exp.exp_cap = pos;
|
|
}
|
|
|
|
return pos;
|
|
}
|
|
|
|
static void vfio_check_pcie_flr(VFIOPCIDevice *vdev, uint8_t pos)
|
|
{
|
|
uint32_t cap = pci_get_long(vdev->pdev.config + pos + PCI_EXP_DEVCAP);
|
|
|
|
if (cap & PCI_EXP_DEVCAP_FLR) {
|
|
trace_vfio_check_pcie_flr(vdev->vbasedev.name);
|
|
vdev->has_flr = true;
|
|
}
|
|
}
|
|
|
|
static void vfio_check_pm_reset(VFIOPCIDevice *vdev, uint8_t pos)
|
|
{
|
|
uint16_t csr = pci_get_word(vdev->pdev.config + pos + PCI_PM_CTRL);
|
|
|
|
if (!(csr & PCI_PM_CTRL_NO_SOFT_RESET)) {
|
|
trace_vfio_check_pm_reset(vdev->vbasedev.name);
|
|
vdev->has_pm_reset = true;
|
|
}
|
|
}
|
|
|
|
static void vfio_check_af_flr(VFIOPCIDevice *vdev, uint8_t pos)
|
|
{
|
|
uint8_t cap = pci_get_byte(vdev->pdev.config + pos + PCI_AF_CAP);
|
|
|
|
if ((cap & PCI_AF_CAP_TP) && (cap & PCI_AF_CAP_FLR)) {
|
|
trace_vfio_check_af_flr(vdev->vbasedev.name);
|
|
vdev->has_flr = true;
|
|
}
|
|
}
|
|
|
|
static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
uint8_t cap_id, next, size;
|
|
int ret;
|
|
|
|
cap_id = pdev->config[pos];
|
|
next = pdev->config[pos + 1];
|
|
|
|
/*
|
|
* If it becomes important to configure capabilities to their actual
|
|
* size, use this as the default when it's something we don't recognize.
|
|
* Since QEMU doesn't actually handle many of the config accesses,
|
|
* exact size doesn't seem worthwhile.
|
|
*/
|
|
size = vfio_std_cap_max_size(pdev, pos);
|
|
|
|
/*
|
|
* pci_add_capability always inserts the new capability at the head
|
|
* of the chain. Therefore to end up with a chain that matches the
|
|
* physical device, we insert from the end by making this recursive.
|
|
* This is also why we pre-caclulate size above as cached config space
|
|
* will be changed as we unwind the stack.
|
|
*/
|
|
if (next) {
|
|
ret = vfio_add_std_cap(vdev, next);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
} else {
|
|
/* Begin the rebuild, use QEMU emulated list bits */
|
|
pdev->config[PCI_CAPABILITY_LIST] = 0;
|
|
vdev->emulated_config_bits[PCI_CAPABILITY_LIST] = 0xff;
|
|
vdev->emulated_config_bits[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
|
|
}
|
|
|
|
/* Use emulated next pointer to allow dropping caps */
|
|
pci_set_byte(vdev->emulated_config_bits + pos + 1, 0xff);
|
|
|
|
switch (cap_id) {
|
|
case PCI_CAP_ID_MSI:
|
|
ret = vfio_setup_msi(vdev, pos);
|
|
break;
|
|
case PCI_CAP_ID_EXP:
|
|
vfio_check_pcie_flr(vdev, pos);
|
|
ret = vfio_setup_pcie_cap(vdev, pos, size);
|
|
break;
|
|
case PCI_CAP_ID_MSIX:
|
|
ret = vfio_setup_msix(vdev, pos);
|
|
break;
|
|
case PCI_CAP_ID_PM:
|
|
vfio_check_pm_reset(vdev, pos);
|
|
vdev->pm_cap = pos;
|
|
ret = pci_add_capability(pdev, cap_id, pos, size);
|
|
break;
|
|
case PCI_CAP_ID_AF:
|
|
vfio_check_af_flr(vdev, pos);
|
|
ret = pci_add_capability(pdev, cap_id, pos, size);
|
|
break;
|
|
default:
|
|
ret = pci_add_capability(pdev, cap_id, pos, size);
|
|
break;
|
|
}
|
|
|
|
if (ret < 0) {
|
|
error_report("vfio: %04x:%02x:%02x.%x Error adding PCI capability "
|
|
"0x%x[0x%x]@0x%x: %d", vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function,
|
|
cap_id, size, pos, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vfio_add_capabilities(VFIOPCIDevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
|
|
if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
|
|
!pdev->config[PCI_CAPABILITY_LIST]) {
|
|
return 0; /* Nothing to add */
|
|
}
|
|
|
|
return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
|
|
}
|
|
|
|
static void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
uint16_t cmd;
|
|
|
|
vfio_disable_interrupts(vdev);
|
|
|
|
/* Make sure the device is in D0 */
|
|
if (vdev->pm_cap) {
|
|
uint16_t pmcsr;
|
|
uint8_t state;
|
|
|
|
pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
|
|
state = pmcsr & PCI_PM_CTRL_STATE_MASK;
|
|
if (state) {
|
|
pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
|
|
vfio_pci_write_config(pdev, vdev->pm_cap + PCI_PM_CTRL, pmcsr, 2);
|
|
/* vfio handles the necessary delay here */
|
|
pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
|
|
state = pmcsr & PCI_PM_CTRL_STATE_MASK;
|
|
if (state) {
|
|
error_report("vfio: Unable to power on device, stuck in D%d",
|
|
state);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Stop any ongoing DMA by disconecting I/O, MMIO, and bus master.
|
|
* Also put INTx Disable in known state.
|
|
*/
|
|
cmd = vfio_pci_read_config(pdev, PCI_COMMAND, 2);
|
|
cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
|
|
PCI_COMMAND_INTX_DISABLE);
|
|
vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
|
|
}
|
|
|
|
static void vfio_pci_post_reset(VFIOPCIDevice *vdev)
|
|
{
|
|
vfio_enable_intx(vdev);
|
|
}
|
|
|
|
static bool vfio_pci_host_match(PCIHostDeviceAddress *host1,
|
|
PCIHostDeviceAddress *host2)
|
|
{
|
|
return (host1->domain == host2->domain && host1->bus == host2->bus &&
|
|
host1->slot == host2->slot && host1->function == host2->function);
|
|
}
|
|
|
|
static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
|
|
{
|
|
VFIOGroup *group;
|
|
struct vfio_pci_hot_reset_info *info;
|
|
struct vfio_pci_dependent_device *devices;
|
|
struct vfio_pci_hot_reset *reset;
|
|
int32_t *fds;
|
|
int ret, i, count;
|
|
bool multi = false;
|
|
|
|
trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
|
|
|
|
vfio_pci_pre_reset(vdev);
|
|
vdev->vbasedev.needs_reset = false;
|
|
|
|
info = g_malloc0(sizeof(*info));
|
|
info->argsz = sizeof(*info);
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
|
|
if (ret && errno != ENOSPC) {
|
|
ret = -errno;
|
|
if (!vdev->has_pm_reset) {
|
|
error_report("vfio: Cannot reset device %04x:%02x:%02x.%x, "
|
|
"no available reset mechanism.", vdev->host.domain,
|
|
vdev->host.bus, vdev->host.slot, vdev->host.function);
|
|
}
|
|
goto out_single;
|
|
}
|
|
|
|
count = info->count;
|
|
info = g_realloc(info, sizeof(*info) + (count * sizeof(*devices)));
|
|
info->argsz = sizeof(*info) + (count * sizeof(*devices));
|
|
devices = &info->devices[0];
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
|
|
if (ret) {
|
|
ret = -errno;
|
|
error_report("vfio: hot reset info failed: %m");
|
|
goto out_single;
|
|
}
|
|
|
|
trace_vfio_pci_hot_reset_has_dep_devices(vdev->vbasedev.name);
|
|
|
|
/* Verify that we have all the groups required */
|
|
for (i = 0; i < info->count; i++) {
|
|
PCIHostDeviceAddress host;
|
|
VFIOPCIDevice *tmp;
|
|
VFIODevice *vbasedev_iter;
|
|
|
|
host.domain = devices[i].segment;
|
|
host.bus = devices[i].bus;
|
|
host.slot = PCI_SLOT(devices[i].devfn);
|
|
host.function = PCI_FUNC(devices[i].devfn);
|
|
|
|
trace_vfio_pci_hot_reset_dep_devices(host.domain,
|
|
host.bus, host.slot, host.function, devices[i].group_id);
|
|
|
|
if (vfio_pci_host_match(&host, &vdev->host)) {
|
|
continue;
|
|
}
|
|
|
|
QLIST_FOREACH(group, &vfio_group_list, next) {
|
|
if (group->groupid == devices[i].group_id) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!group) {
|
|
if (!vdev->has_pm_reset) {
|
|
error_report("vfio: Cannot reset device %s, "
|
|
"depends on group %d which is not owned.",
|
|
vdev->vbasedev.name, devices[i].group_id);
|
|
}
|
|
ret = -EPERM;
|
|
goto out;
|
|
}
|
|
|
|
/* Prep dependent devices for reset and clear our marker. */
|
|
QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
|
|
if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
|
|
continue;
|
|
}
|
|
tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
|
|
if (vfio_pci_host_match(&host, &tmp->host)) {
|
|
if (single) {
|
|
ret = -EINVAL;
|
|
goto out_single;
|
|
}
|
|
vfio_pci_pre_reset(tmp);
|
|
tmp->vbasedev.needs_reset = false;
|
|
multi = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!single && !multi) {
|
|
ret = -EINVAL;
|
|
goto out_single;
|
|
}
|
|
|
|
/* Determine how many group fds need to be passed */
|
|
count = 0;
|
|
QLIST_FOREACH(group, &vfio_group_list, next) {
|
|
for (i = 0; i < info->count; i++) {
|
|
if (group->groupid == devices[i].group_id) {
|
|
count++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
reset = g_malloc0(sizeof(*reset) + (count * sizeof(*fds)));
|
|
reset->argsz = sizeof(*reset) + (count * sizeof(*fds));
|
|
fds = &reset->group_fds[0];
|
|
|
|
/* Fill in group fds */
|
|
QLIST_FOREACH(group, &vfio_group_list, next) {
|
|
for (i = 0; i < info->count; i++) {
|
|
if (group->groupid == devices[i].group_id) {
|
|
fds[reset->count++] = group->fd;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Bus reset! */
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_PCI_HOT_RESET, reset);
|
|
g_free(reset);
|
|
|
|
trace_vfio_pci_hot_reset_result(vdev->vbasedev.name,
|
|
ret ? "%m" : "Success");
|
|
|
|
out:
|
|
/* Re-enable INTx on affected devices */
|
|
for (i = 0; i < info->count; i++) {
|
|
PCIHostDeviceAddress host;
|
|
VFIOPCIDevice *tmp;
|
|
VFIODevice *vbasedev_iter;
|
|
|
|
host.domain = devices[i].segment;
|
|
host.bus = devices[i].bus;
|
|
host.slot = PCI_SLOT(devices[i].devfn);
|
|
host.function = PCI_FUNC(devices[i].devfn);
|
|
|
|
if (vfio_pci_host_match(&host, &vdev->host)) {
|
|
continue;
|
|
}
|
|
|
|
QLIST_FOREACH(group, &vfio_group_list, next) {
|
|
if (group->groupid == devices[i].group_id) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!group) {
|
|
break;
|
|
}
|
|
|
|
QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
|
|
if (vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
|
|
continue;
|
|
}
|
|
tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
|
|
if (vfio_pci_host_match(&host, &tmp->host)) {
|
|
vfio_pci_post_reset(tmp);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
out_single:
|
|
vfio_pci_post_reset(vdev);
|
|
g_free(info);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* We want to differentiate hot reset of mulitple in-use devices vs hot reset
|
|
* of a single in-use device. VFIO_DEVICE_RESET will already handle the case
|
|
* of doing hot resets when there is only a single device per bus. The in-use
|
|
* here refers to how many VFIODevices are affected. A hot reset that affects
|
|
* multiple devices, but only a single in-use device, means that we can call
|
|
* it from our bus ->reset() callback since the extent is effectively a single
|
|
* device. This allows us to make use of it in the hotplug path. When there
|
|
* are multiple in-use devices, we can only trigger the hot reset during a
|
|
* system reset and thus from our reset handler. We separate _one vs _multi
|
|
* here so that we don't overlap and do a double reset on the system reset
|
|
* path where both our reset handler and ->reset() callback are used. Calling
|
|
* _one() will only do a hot reset for the one in-use devices case, calling
|
|
* _multi() will do nothing if a _one() would have been sufficient.
|
|
*/
|
|
static int vfio_pci_hot_reset_one(VFIOPCIDevice *vdev)
|
|
{
|
|
return vfio_pci_hot_reset(vdev, true);
|
|
}
|
|
|
|
static int vfio_pci_hot_reset_multi(VFIODevice *vbasedev)
|
|
{
|
|
VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
|
|
return vfio_pci_hot_reset(vdev, false);
|
|
}
|
|
|
|
static void vfio_pci_compute_needs_reset(VFIODevice *vbasedev)
|
|
{
|
|
VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
|
|
if (!vbasedev->reset_works || (!vdev->has_flr && vdev->has_pm_reset)) {
|
|
vbasedev->needs_reset = true;
|
|
}
|
|
}
|
|
|
|
static VFIODeviceOps vfio_pci_ops = {
|
|
.vfio_compute_needs_reset = vfio_pci_compute_needs_reset,
|
|
.vfio_hot_reset_multi = vfio_pci_hot_reset_multi,
|
|
.vfio_eoi = vfio_eoi,
|
|
};
|
|
|
|
static int vfio_populate_device(VFIOPCIDevice *vdev)
|
|
{
|
|
VFIODevice *vbasedev = &vdev->vbasedev;
|
|
struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) };
|
|
struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
|
|
int i, ret = -1;
|
|
|
|
/* Sanity check device */
|
|
if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) {
|
|
error_report("vfio: Um, this isn't a PCI device");
|
|
goto error;
|
|
}
|
|
|
|
if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) {
|
|
error_report("vfio: unexpected number of io regions %u",
|
|
vbasedev->num_regions);
|
|
goto error;
|
|
}
|
|
|
|
if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) {
|
|
error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs);
|
|
goto error;
|
|
}
|
|
|
|
for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
|
|
reg_info.index = i;
|
|
|
|
ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
|
|
if (ret) {
|
|
error_report("vfio: Error getting region %d info: %m", i);
|
|
goto error;
|
|
}
|
|
|
|
trace_vfio_populate_device_region(vbasedev->name, i,
|
|
(unsigned long)reg_info.size,
|
|
(unsigned long)reg_info.offset,
|
|
(unsigned long)reg_info.flags);
|
|
|
|
vdev->bars[i].region.vbasedev = vbasedev;
|
|
vdev->bars[i].region.flags = reg_info.flags;
|
|
vdev->bars[i].region.size = reg_info.size;
|
|
vdev->bars[i].region.fd_offset = reg_info.offset;
|
|
vdev->bars[i].region.nr = i;
|
|
QLIST_INIT(&vdev->bars[i].quirks);
|
|
}
|
|
|
|
reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX;
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
|
|
if (ret) {
|
|
error_report("vfio: Error getting config info: %m");
|
|
goto error;
|
|
}
|
|
|
|
trace_vfio_populate_device_config(vdev->vbasedev.name,
|
|
(unsigned long)reg_info.size,
|
|
(unsigned long)reg_info.offset,
|
|
(unsigned long)reg_info.flags);
|
|
|
|
vdev->config_size = reg_info.size;
|
|
if (vdev->config_size == PCI_CONFIG_SPACE_SIZE) {
|
|
vdev->pdev.cap_present &= ~QEMU_PCI_CAP_EXPRESS;
|
|
}
|
|
vdev->config_offset = reg_info.offset;
|
|
|
|
if ((vdev->features & VFIO_FEATURE_ENABLE_VGA) &&
|
|
vbasedev->num_regions > VFIO_PCI_VGA_REGION_INDEX) {
|
|
struct vfio_region_info vga_info = {
|
|
.argsz = sizeof(vga_info),
|
|
.index = VFIO_PCI_VGA_REGION_INDEX,
|
|
};
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_REGION_INFO, &vga_info);
|
|
if (ret) {
|
|
error_report(
|
|
"vfio: Device does not support requested feature x-vga");
|
|
goto error;
|
|
}
|
|
|
|
if (!(vga_info.flags & VFIO_REGION_INFO_FLAG_READ) ||
|
|
!(vga_info.flags & VFIO_REGION_INFO_FLAG_WRITE) ||
|
|
vga_info.size < 0xbffff + 1) {
|
|
error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
|
|
(unsigned long)vga_info.flags,
|
|
(unsigned long)vga_info.size);
|
|
goto error;
|
|
}
|
|
|
|
vdev->vga.fd_offset = vga_info.offset;
|
|
vdev->vga.fd = vdev->vbasedev.fd;
|
|
|
|
vdev->vga.region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE;
|
|
vdev->vga.region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM;
|
|
QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_MEM].quirks);
|
|
|
|
vdev->vga.region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE;
|
|
vdev->vga.region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO;
|
|
QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].quirks);
|
|
|
|
vdev->vga.region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE;
|
|
vdev->vga.region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI;
|
|
QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks);
|
|
|
|
vdev->has_vga = true;
|
|
}
|
|
|
|
irq_info.index = VFIO_PCI_ERR_IRQ_INDEX;
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info);
|
|
if (ret) {
|
|
/* This can fail for an old kernel or legacy PCI dev */
|
|
trace_vfio_populate_device_get_irq_info_failure();
|
|
ret = 0;
|
|
} else if (irq_info.count == 1) {
|
|
vdev->pci_aer = true;
|
|
} else {
|
|
error_report("vfio: %s "
|
|
"Could not enable error recovery for the device",
|
|
vbasedev->name);
|
|
}
|
|
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_put_device(VFIOPCIDevice *vdev)
|
|
{
|
|
g_free(vdev->vbasedev.name);
|
|
if (vdev->msix) {
|
|
object_unparent(OBJECT(&vdev->msix->mmap_mem));
|
|
g_free(vdev->msix);
|
|
vdev->msix = NULL;
|
|
}
|
|
vfio_put_base_device(&vdev->vbasedev);
|
|
}
|
|
|
|
static void vfio_err_notifier_handler(void *opaque)
|
|
{
|
|
VFIOPCIDevice *vdev = opaque;
|
|
|
|
if (!event_notifier_test_and_clear(&vdev->err_notifier)) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* TBD. Retrieve the error details and decide what action
|
|
* needs to be taken. One of the actions could be to pass
|
|
* the error to the guest and have the guest driver recover
|
|
* from the error. This requires that PCIe capabilities be
|
|
* exposed to the guest. For now, we just terminate the
|
|
* guest to contain the error.
|
|
*/
|
|
|
|
error_report("%s(%04x:%02x:%02x.%x) Unrecoverable error detected. "
|
|
"Please collect any data possible and then kill the guest",
|
|
__func__, vdev->host.domain, vdev->host.bus,
|
|
vdev->host.slot, vdev->host.function);
|
|
|
|
vm_stop(RUN_STATE_INTERNAL_ERROR);
|
|
}
|
|
|
|
/*
|
|
* Registers error notifier for devices supporting error recovery.
|
|
* If we encounter a failure in this function, we report an error
|
|
* and continue after disabling error recovery support for the
|
|
* device.
|
|
*/
|
|
static void vfio_register_err_notifier(VFIOPCIDevice *vdev)
|
|
{
|
|
int ret;
|
|
int argsz;
|
|
struct vfio_irq_set *irq_set;
|
|
int32_t *pfd;
|
|
|
|
if (!vdev->pci_aer) {
|
|
return;
|
|
}
|
|
|
|
if (event_notifier_init(&vdev->err_notifier, 0)) {
|
|
error_report("vfio: Unable to init event notifier for error detection");
|
|
vdev->pci_aer = false;
|
|
return;
|
|
}
|
|
|
|
argsz = sizeof(*irq_set) + sizeof(*pfd);
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
|
|
VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
|
|
irq_set->start = 0;
|
|
irq_set->count = 1;
|
|
pfd = (int32_t *)&irq_set->data;
|
|
|
|
*pfd = event_notifier_get_fd(&vdev->err_notifier);
|
|
qemu_set_fd_handler(*pfd, vfio_err_notifier_handler, NULL, vdev);
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
|
|
if (ret) {
|
|
error_report("vfio: Failed to set up error notification");
|
|
qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
|
|
event_notifier_cleanup(&vdev->err_notifier);
|
|
vdev->pci_aer = false;
|
|
}
|
|
g_free(irq_set);
|
|
}
|
|
|
|
static void vfio_unregister_err_notifier(VFIOPCIDevice *vdev)
|
|
{
|
|
int argsz;
|
|
struct vfio_irq_set *irq_set;
|
|
int32_t *pfd;
|
|
int ret;
|
|
|
|
if (!vdev->pci_aer) {
|
|
return;
|
|
}
|
|
|
|
argsz = sizeof(*irq_set) + sizeof(*pfd);
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
|
|
VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
|
|
irq_set->start = 0;
|
|
irq_set->count = 1;
|
|
pfd = (int32_t *)&irq_set->data;
|
|
*pfd = -1;
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set);
|
|
if (ret) {
|
|
error_report("vfio: Failed to de-assign error fd: %m");
|
|
}
|
|
g_free(irq_set);
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vdev->err_notifier),
|
|
NULL, NULL, vdev);
|
|
event_notifier_cleanup(&vdev->err_notifier);
|
|
}
|
|
|
|
static void vfio_req_notifier_handler(void *opaque)
|
|
{
|
|
VFIOPCIDevice *vdev = opaque;
|
|
|
|
if (!event_notifier_test_and_clear(&vdev->req_notifier)) {
|
|
return;
|
|
}
|
|
|
|
qdev_unplug(&vdev->pdev.qdev, NULL);
|
|
}
|
|
|
|
static void vfio_register_req_notifier(VFIOPCIDevice *vdev)
|
|
{
|
|
struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info),
|
|
.index = VFIO_PCI_REQ_IRQ_INDEX };
|
|
int argsz;
|
|
struct vfio_irq_set *irq_set;
|
|
int32_t *pfd;
|
|
|
|
if (!(vdev->features & VFIO_FEATURE_ENABLE_REQ)) {
|
|
return;
|
|
}
|
|
|
|
if (ioctl(vdev->vbasedev.fd,
|
|
VFIO_DEVICE_GET_IRQ_INFO, &irq_info) < 0 || irq_info.count < 1) {
|
|
return;
|
|
}
|
|
|
|
if (event_notifier_init(&vdev->req_notifier, 0)) {
|
|
error_report("vfio: Unable to init event notifier for device request");
|
|
return;
|
|
}
|
|
|
|
argsz = sizeof(*irq_set) + sizeof(*pfd);
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
|
|
VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
|
|
irq_set->start = 0;
|
|
irq_set->count = 1;
|
|
pfd = (int32_t *)&irq_set->data;
|
|
|
|
*pfd = event_notifier_get_fd(&vdev->req_notifier);
|
|
qemu_set_fd_handler(*pfd, vfio_req_notifier_handler, NULL, vdev);
|
|
|
|
if (ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
|
|
error_report("vfio: Failed to set up device request notification");
|
|
qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
|
|
event_notifier_cleanup(&vdev->req_notifier);
|
|
} else {
|
|
vdev->req_enabled = true;
|
|
}
|
|
|
|
g_free(irq_set);
|
|
}
|
|
|
|
static void vfio_unregister_req_notifier(VFIOPCIDevice *vdev)
|
|
{
|
|
int argsz;
|
|
struct vfio_irq_set *irq_set;
|
|
int32_t *pfd;
|
|
|
|
if (!vdev->req_enabled) {
|
|
return;
|
|
}
|
|
|
|
argsz = sizeof(*irq_set) + sizeof(*pfd);
|
|
|
|
irq_set = g_malloc0(argsz);
|
|
irq_set->argsz = argsz;
|
|
irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
|
|
VFIO_IRQ_SET_ACTION_TRIGGER;
|
|
irq_set->index = VFIO_PCI_REQ_IRQ_INDEX;
|
|
irq_set->start = 0;
|
|
irq_set->count = 1;
|
|
pfd = (int32_t *)&irq_set->data;
|
|
*pfd = -1;
|
|
|
|
if (ioctl(vdev->vbasedev.fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
|
|
error_report("vfio: Failed to de-assign device request fd: %m");
|
|
}
|
|
g_free(irq_set);
|
|
qemu_set_fd_handler(event_notifier_get_fd(&vdev->req_notifier),
|
|
NULL, NULL, vdev);
|
|
event_notifier_cleanup(&vdev->req_notifier);
|
|
|
|
vdev->req_enabled = false;
|
|
}
|
|
|
|
/*
|
|
* AMD Radeon PCI config reset, based on Linux:
|
|
* drivers/gpu/drm/radeon/ci_smc.c:ci_is_smc_running()
|
|
* drivers/gpu/drm/radeon/radeon_device.c:radeon_pci_config_reset
|
|
* drivers/gpu/drm/radeon/ci_smc.c:ci_reset_smc()
|
|
* drivers/gpu/drm/radeon/ci_smc.c:ci_stop_smc_clock()
|
|
* IDs: include/drm/drm_pciids.h
|
|
* Registers: http://cgit.freedesktop.org/~agd5f/linux/commit/?id=4e2aa447f6f0
|
|
*
|
|
* Bonaire and Hawaii GPUs do not respond to a bus reset. This is a bug in the
|
|
* hardware that should be fixed on future ASICs. The symptom of this is that
|
|
* once the accerlated driver loads, Windows guests will bsod on subsequent
|
|
* attmpts to load the driver, such as after VM reset or shutdown/restart. To
|
|
* work around this, we do an AMD specific PCI config reset, followed by an SMC
|
|
* reset. The PCI config reset only works if SMC firmware is running, so we
|
|
* have a dependency on the state of the device as to whether this reset will
|
|
* be effective. There are still cases where we won't be able to kick the
|
|
* device into working, but this greatly improves the usability overall. The
|
|
* config reset magic is relatively common on AMD GPUs, but the setup and SMC
|
|
* poking is largely ASIC specific.
|
|
*/
|
|
static bool vfio_radeon_smc_is_running(VFIOPCIDevice *vdev)
|
|
{
|
|
uint32_t clk, pc_c;
|
|
|
|
/*
|
|
* Registers 200h and 204h are index and data registers for acessing
|
|
* indirect configuration registers within the device.
|
|
*/
|
|
vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000004, 4);
|
|
clk = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
|
|
vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000370, 4);
|
|
pc_c = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
|
|
|
|
return (!(clk & 1) && (0x20100 <= pc_c));
|
|
}
|
|
|
|
/*
|
|
* The scope of a config reset is controlled by a mode bit in the misc register
|
|
* and a fuse, exposed as a bit in another register. The fuse is the default
|
|
* (0 = GFX, 1 = whole GPU), the misc bit is a toggle, with the forumula
|
|
* scope = !(misc ^ fuse), where the resulting scope is defined the same as
|
|
* the fuse. A truth table therefore tells us that if misc == fuse, we need
|
|
* to flip the value of the bit in the misc register.
|
|
*/
|
|
static void vfio_radeon_set_gfx_only_reset(VFIOPCIDevice *vdev)
|
|
{
|
|
uint32_t misc, fuse;
|
|
bool a, b;
|
|
|
|
vfio_region_write(&vdev->bars[5].region, 0x200, 0xc00c0000, 4);
|
|
fuse = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
|
|
b = fuse & 64;
|
|
|
|
vfio_region_write(&vdev->bars[5].region, 0x200, 0xc0000010, 4);
|
|
misc = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
|
|
a = misc & 2;
|
|
|
|
if (a == b) {
|
|
vfio_region_write(&vdev->bars[5].region, 0x204, misc ^ 2, 4);
|
|
vfio_region_read(&vdev->bars[5].region, 0x204, 4); /* flush */
|
|
}
|
|
}
|
|
|
|
static int vfio_radeon_reset(VFIOPCIDevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
int i, ret = 0;
|
|
uint32_t data;
|
|
|
|
/* Defer to a kernel implemented reset */
|
|
if (vdev->vbasedev.reset_works) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Enable only memory BAR access */
|
|
vfio_pci_write_config(pdev, PCI_COMMAND, PCI_COMMAND_MEMORY, 2);
|
|
|
|
/* Reset only works if SMC firmware is loaded and running */
|
|
if (!vfio_radeon_smc_is_running(vdev)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Make sure only the GFX function is reset */
|
|
vfio_radeon_set_gfx_only_reset(vdev);
|
|
|
|
/* AMD PCI config reset */
|
|
vfio_pci_write_config(pdev, 0x7c, 0x39d5e86b, 4);
|
|
usleep(100);
|
|
|
|
/* Read back the memory size to make sure we're out of reset */
|
|
for (i = 0; i < 100000; i++) {
|
|
if (vfio_region_read(&vdev->bars[5].region, 0x5428, 4) != 0xffffffff) {
|
|
break;
|
|
}
|
|
usleep(1);
|
|
}
|
|
|
|
/* Reset SMC */
|
|
vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000000, 4);
|
|
data = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
|
|
data |= 1;
|
|
vfio_region_write(&vdev->bars[5].region, 0x204, data, 4);
|
|
|
|
/* Disable SMC clock */
|
|
vfio_region_write(&vdev->bars[5].region, 0x200, 0x80000004, 4);
|
|
data = vfio_region_read(&vdev->bars[5].region, 0x204, 4);
|
|
data |= 1;
|
|
vfio_region_write(&vdev->bars[5].region, 0x204, data, 4);
|
|
|
|
out:
|
|
/* Restore PCI command register */
|
|
vfio_pci_write_config(pdev, PCI_COMMAND, 0, 2);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_setup_resetfn(VFIOPCIDevice *vdev)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
uint16_t vendor, device;
|
|
|
|
vendor = pci_get_word(pdev->config + PCI_VENDOR_ID);
|
|
device = pci_get_word(pdev->config + PCI_DEVICE_ID);
|
|
|
|
switch (vendor) {
|
|
case 0x1002:
|
|
switch (device) {
|
|
/* Bonaire */
|
|
case 0x6649: /* Bonaire [FirePro W5100] */
|
|
case 0x6650:
|
|
case 0x6651:
|
|
case 0x6658: /* Bonaire XTX [Radeon R7 260X] */
|
|
case 0x665c: /* Bonaire XT [Radeon HD 7790/8770 / R9 260 OEM] */
|
|
case 0x665d: /* Bonaire [Radeon R7 200 Series] */
|
|
/* Hawaii */
|
|
case 0x67A0: /* Hawaii XT GL [FirePro W9100] */
|
|
case 0x67A1: /* Hawaii PRO GL [FirePro W8100] */
|
|
case 0x67A2:
|
|
case 0x67A8:
|
|
case 0x67A9:
|
|
case 0x67AA:
|
|
case 0x67B0: /* Hawaii XT [Radeon R9 290X] */
|
|
case 0x67B1: /* Hawaii PRO [Radeon R9 290] */
|
|
case 0x67B8:
|
|
case 0x67B9:
|
|
case 0x67BA:
|
|
case 0x67BE:
|
|
vdev->resetfn = vfio_radeon_reset;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int vfio_initfn(PCIDevice *pdev)
|
|
{
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
|
|
VFIODevice *vbasedev_iter;
|
|
VFIOGroup *group;
|
|
char path[PATH_MAX], iommu_group_path[PATH_MAX], *group_name;
|
|
ssize_t len;
|
|
struct stat st;
|
|
int groupid;
|
|
int ret;
|
|
|
|
/* Check that the host device exists */
|
|
snprintf(path, sizeof(path),
|
|
"/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
if (stat(path, &st) < 0) {
|
|
error_report("vfio: error: no such host device: %s", path);
|
|
return -errno;
|
|
}
|
|
|
|
vdev->vbasedev.ops = &vfio_pci_ops;
|
|
|
|
vdev->vbasedev.type = VFIO_DEVICE_TYPE_PCI;
|
|
vdev->vbasedev.name = g_strdup_printf("%04x:%02x:%02x.%01x",
|
|
vdev->host.domain, vdev->host.bus,
|
|
vdev->host.slot, vdev->host.function);
|
|
|
|
strncat(path, "iommu_group", sizeof(path) - strlen(path) - 1);
|
|
|
|
len = readlink(path, iommu_group_path, sizeof(path));
|
|
if (len <= 0 || len >= sizeof(path)) {
|
|
error_report("vfio: error no iommu_group for device");
|
|
return len < 0 ? -errno : -ENAMETOOLONG;
|
|
}
|
|
|
|
iommu_group_path[len] = 0;
|
|
group_name = basename(iommu_group_path);
|
|
|
|
if (sscanf(group_name, "%d", &groupid) != 1) {
|
|
error_report("vfio: error reading %s: %m", path);
|
|
return -errno;
|
|
}
|
|
|
|
trace_vfio_initfn(vdev->vbasedev.name, groupid);
|
|
|
|
group = vfio_get_group(groupid, pci_device_iommu_address_space(pdev));
|
|
if (!group) {
|
|
error_report("vfio: failed to get group %d", groupid);
|
|
return -ENOENT;
|
|
}
|
|
|
|
snprintf(path, sizeof(path), "%04x:%02x:%02x.%01x",
|
|
vdev->host.domain, vdev->host.bus, vdev->host.slot,
|
|
vdev->host.function);
|
|
|
|
QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
|
|
if (strcmp(vbasedev_iter->name, vdev->vbasedev.name) == 0) {
|
|
error_report("vfio: error: device %s is already attached", path);
|
|
vfio_put_group(group);
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
|
|
ret = vfio_get_device(group, path, &vdev->vbasedev);
|
|
if (ret) {
|
|
error_report("vfio: failed to get device %s", path);
|
|
vfio_put_group(group);
|
|
return ret;
|
|
}
|
|
|
|
ret = vfio_populate_device(vdev);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
/* Get a copy of config space */
|
|
ret = pread(vdev->vbasedev.fd, vdev->pdev.config,
|
|
MIN(pci_config_size(&vdev->pdev), vdev->config_size),
|
|
vdev->config_offset);
|
|
if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
|
|
ret = ret < 0 ? -errno : -EFAULT;
|
|
error_report("vfio: Failed to read device config space");
|
|
return ret;
|
|
}
|
|
|
|
/* vfio emulates a lot for us, but some bits need extra love */
|
|
vdev->emulated_config_bits = g_malloc0(vdev->config_size);
|
|
|
|
/* QEMU can choose to expose the ROM or not */
|
|
memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4);
|
|
|
|
/* QEMU can change multi-function devices to single function, or reverse */
|
|
vdev->emulated_config_bits[PCI_HEADER_TYPE] =
|
|
PCI_HEADER_TYPE_MULTI_FUNCTION;
|
|
|
|
/* Restore or clear multifunction, this is always controlled by QEMU */
|
|
if (vdev->pdev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
|
|
vdev->pdev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
|
|
} else {
|
|
vdev->pdev.config[PCI_HEADER_TYPE] &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
|
|
}
|
|
|
|
/*
|
|
* Clear host resource mapping info. If we choose not to register a
|
|
* BAR, such as might be the case with the option ROM, we can get
|
|
* confusing, unwritable, residual addresses from the host here.
|
|
*/
|
|
memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
|
|
memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
|
|
|
|
vfio_pci_size_rom(vdev);
|
|
|
|
ret = vfio_early_setup_msix(vdev);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
vfio_map_bars(vdev);
|
|
|
|
ret = vfio_add_capabilities(vdev);
|
|
if (ret) {
|
|
goto out_teardown;
|
|
}
|
|
|
|
/* QEMU emulates all of MSI & MSIX */
|
|
if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
|
|
memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
|
|
MSIX_CAP_LENGTH);
|
|
}
|
|
|
|
if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
|
|
memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
|
|
vdev->msi_cap_size);
|
|
}
|
|
|
|
if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
|
|
vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
|
|
vfio_intx_mmap_enable, vdev);
|
|
pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_update_irq);
|
|
ret = vfio_enable_intx(vdev);
|
|
if (ret) {
|
|
goto out_teardown;
|
|
}
|
|
}
|
|
|
|
vfio_register_err_notifier(vdev);
|
|
vfio_register_req_notifier(vdev);
|
|
vfio_setup_resetfn(vdev);
|
|
|
|
return 0;
|
|
|
|
out_teardown:
|
|
pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
|
vfio_teardown_msi(vdev);
|
|
vfio_unregister_bars(vdev);
|
|
return ret;
|
|
}
|
|
|
|
static void vfio_instance_finalize(Object *obj)
|
|
{
|
|
PCIDevice *pci_dev = PCI_DEVICE(obj);
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pci_dev);
|
|
VFIOGroup *group = vdev->vbasedev.group;
|
|
|
|
vfio_unmap_bars(vdev);
|
|
g_free(vdev->emulated_config_bits);
|
|
g_free(vdev->rom);
|
|
vfio_put_device(vdev);
|
|
vfio_put_group(group);
|
|
}
|
|
|
|
static void vfio_exitfn(PCIDevice *pdev)
|
|
{
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
|
|
|
|
vfio_unregister_req_notifier(vdev);
|
|
vfio_unregister_err_notifier(vdev);
|
|
pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
|
|
vfio_disable_interrupts(vdev);
|
|
if (vdev->intx.mmap_timer) {
|
|
timer_free(vdev->intx.mmap_timer);
|
|
}
|
|
vfio_teardown_msi(vdev);
|
|
vfio_unregister_bars(vdev);
|
|
}
|
|
|
|
static void vfio_pci_reset(DeviceState *dev)
|
|
{
|
|
PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev);
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
|
|
|
|
trace_vfio_pci_reset(vdev->vbasedev.name);
|
|
|
|
vfio_pci_pre_reset(vdev);
|
|
|
|
if (vdev->resetfn && !vdev->resetfn(vdev)) {
|
|
goto post_reset;
|
|
}
|
|
|
|
if (vdev->vbasedev.reset_works &&
|
|
(vdev->has_flr || !vdev->has_pm_reset) &&
|
|
!ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {
|
|
trace_vfio_pci_reset_flr(vdev->vbasedev.name);
|
|
goto post_reset;
|
|
}
|
|
|
|
/* See if we can do our own bus reset */
|
|
if (!vfio_pci_hot_reset_one(vdev)) {
|
|
goto post_reset;
|
|
}
|
|
|
|
/* If nothing else works and the device supports PM reset, use it */
|
|
if (vdev->vbasedev.reset_works && vdev->has_pm_reset &&
|
|
!ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {
|
|
trace_vfio_pci_reset_pm(vdev->vbasedev.name);
|
|
goto post_reset;
|
|
}
|
|
|
|
post_reset:
|
|
vfio_pci_post_reset(vdev);
|
|
}
|
|
|
|
static void vfio_instance_init(Object *obj)
|
|
{
|
|
PCIDevice *pci_dev = PCI_DEVICE(obj);
|
|
VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, PCI_DEVICE(obj));
|
|
|
|
device_add_bootindex_property(obj, &vdev->bootindex,
|
|
"bootindex", NULL,
|
|
&pci_dev->qdev, NULL);
|
|
}
|
|
|
|
static Property vfio_pci_dev_properties[] = {
|
|
DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIOPCIDevice, host),
|
|
DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIOPCIDevice,
|
|
intx.mmap_timeout, 1100),
|
|
DEFINE_PROP_BIT("x-vga", VFIOPCIDevice, features,
|
|
VFIO_FEATURE_ENABLE_VGA_BIT, false),
|
|
DEFINE_PROP_BIT("x-req", VFIOPCIDevice, features,
|
|
VFIO_FEATURE_ENABLE_REQ_BIT, true),
|
|
DEFINE_PROP_BOOL("x-mmap", VFIOPCIDevice, vbasedev.allow_mmap, true),
|
|
/*
|
|
* TODO - support passed fds... is this necessary?
|
|
* DEFINE_PROP_STRING("vfiofd", VFIOPCIDevice, vfiofd_name),
|
|
* DEFINE_PROP_STRING("vfiogroupfd, VFIOPCIDevice, vfiogroupfd_name),
|
|
*/
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static const VMStateDescription vfio_pci_vmstate = {
|
|
.name = "vfio-pci",
|
|
.unmigratable = 1,
|
|
};
|
|
|
|
static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
|
|
|
|
dc->reset = vfio_pci_reset;
|
|
dc->props = vfio_pci_dev_properties;
|
|
dc->vmsd = &vfio_pci_vmstate;
|
|
dc->desc = "VFIO-based PCI device assignment";
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
pdc->init = vfio_initfn;
|
|
pdc->exit = vfio_exitfn;
|
|
pdc->config_read = vfio_pci_read_config;
|
|
pdc->config_write = vfio_pci_write_config;
|
|
pdc->is_express = 1; /* We might be */
|
|
}
|
|
|
|
static const TypeInfo vfio_pci_dev_info = {
|
|
.name = "vfio-pci",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(VFIOPCIDevice),
|
|
.class_init = vfio_pci_dev_class_init,
|
|
.instance_init = vfio_instance_init,
|
|
.instance_finalize = vfio_instance_finalize,
|
|
};
|
|
|
|
static void register_vfio_pci_dev_type(void)
|
|
{
|
|
type_register_static(&vfio_pci_dev_info);
|
|
}
|
|
|
|
type_init(register_vfio_pci_dev_type)
|