This minimizes QEMUMachine usage, as part of machine QOM-ification. Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
1229 lines
36 KiB
C
1229 lines
36 KiB
C
/*
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* Copyright (C) 2010 Citrix Ltd.
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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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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include <sys/mman.h>
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#include "hw/pci/pci.h"
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#include "hw/i386/pc.h"
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#include "hw/xen/xen_common.h"
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#include "hw/xen/xen_backend.h"
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#include "qmp-commands.h"
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#include "sysemu/char.h"
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#include "qemu/range.h"
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#include "sysemu/xen-mapcache.h"
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#include "trace.h"
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#include "exec/address-spaces.h"
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#include <xen/hvm/ioreq.h>
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#include <xen/hvm/params.h>
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#include <xen/hvm/e820.h>
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//#define DEBUG_XEN
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#ifdef DEBUG_XEN
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi;
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static MemoryRegion *framebuffer;
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static bool xen_in_migration;
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/* Compatibility with older version */
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#if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
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static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
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{
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return shared_page->vcpu_iodata[i].vp_eport;
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}
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static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
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{
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return &shared_page->vcpu_iodata[vcpu].vp_ioreq;
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}
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# define FMT_ioreq_size PRIx64
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#else
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static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
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{
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return shared_page->vcpu_ioreq[i].vp_eport;
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}
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static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
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{
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return &shared_page->vcpu_ioreq[vcpu];
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}
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# define FMT_ioreq_size "u"
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#endif
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#ifndef HVM_PARAM_BUFIOREQ_EVTCHN
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#define HVM_PARAM_BUFIOREQ_EVTCHN 26
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#endif
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#define BUFFER_IO_MAX_DELAY 100
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typedef struct XenPhysmap {
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hwaddr start_addr;
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ram_addr_t size;
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char *name;
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hwaddr phys_offset;
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QLIST_ENTRY(XenPhysmap) list;
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} XenPhysmap;
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typedef struct XenIOState {
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shared_iopage_t *shared_page;
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buffered_iopage_t *buffered_io_page;
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QEMUTimer *buffered_io_timer;
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/* the evtchn port for polling the notification, */
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evtchn_port_t *ioreq_local_port;
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/* evtchn local port for buffered io */
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evtchn_port_t bufioreq_local_port;
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/* the evtchn fd for polling */
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XenEvtchn xce_handle;
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/* which vcpu we are serving */
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int send_vcpu;
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struct xs_handle *xenstore;
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MemoryListener memory_listener;
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QLIST_HEAD(, XenPhysmap) physmap;
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hwaddr free_phys_offset;
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const XenPhysmap *log_for_dirtybit;
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Notifier exit;
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Notifier suspend;
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Notifier wakeup;
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} XenIOState;
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/* Xen specific function for piix pci */
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int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
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{
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return irq_num + ((pci_dev->devfn >> 3) << 2);
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}
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void xen_piix3_set_irq(void *opaque, int irq_num, int level)
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{
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xc_hvm_set_pci_intx_level(xen_xc, xen_domid, 0, 0, irq_num >> 2,
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irq_num & 3, level);
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}
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void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
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{
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int i;
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/* Scan for updates to PCI link routes (0x60-0x63). */
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for (i = 0; i < len; i++) {
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uint8_t v = (val >> (8 * i)) & 0xff;
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if (v & 0x80) {
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v = 0;
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}
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v &= 0xf;
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if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
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xc_hvm_set_pci_link_route(xen_xc, xen_domid, address + i - 0x60, v);
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}
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}
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}
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void xen_hvm_inject_msi(uint64_t addr, uint32_t data)
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{
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xen_xc_hvm_inject_msi(xen_xc, xen_domid, addr, data);
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}
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static void xen_suspend_notifier(Notifier *notifier, void *data)
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{
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xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3);
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}
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/* Xen Interrupt Controller */
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static void xen_set_irq(void *opaque, int irq, int level)
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{
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xc_hvm_set_isa_irq_level(xen_xc, xen_domid, irq, level);
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}
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qemu_irq *xen_interrupt_controller_init(void)
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{
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return qemu_allocate_irqs(xen_set_irq, NULL, 16);
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}
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/* Memory Ops */
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static void xen_ram_init(ram_addr_t ram_size, MemoryRegion **ram_memory_p)
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{
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MemoryRegion *sysmem = get_system_memory();
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ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
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ram_addr_t block_len;
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block_len = ram_size;
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if (ram_size >= HVM_BELOW_4G_RAM_END) {
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/* Xen does not allocate the memory continuously, and keep a hole at
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* HVM_BELOW_4G_MMIO_START of HVM_BELOW_4G_MMIO_LENGTH
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*/
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block_len += HVM_BELOW_4G_MMIO_LENGTH;
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}
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memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len);
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*ram_memory_p = &ram_memory;
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vmstate_register_ram_global(&ram_memory);
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if (ram_size >= HVM_BELOW_4G_RAM_END) {
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above_4g_mem_size = ram_size - HVM_BELOW_4G_RAM_END;
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below_4g_mem_size = HVM_BELOW_4G_RAM_END;
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} else {
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below_4g_mem_size = ram_size;
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}
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memory_region_init_alias(&ram_640k, NULL, "xen.ram.640k",
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&ram_memory, 0, 0xa0000);
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memory_region_add_subregion(sysmem, 0, &ram_640k);
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/* Skip of the VGA IO memory space, it will be registered later by the VGA
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* emulated device.
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*
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* The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
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* the Options ROM, so it is registered here as RAM.
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*/
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memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo",
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&ram_memory, 0xc0000, below_4g_mem_size - 0xc0000);
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memory_region_add_subregion(sysmem, 0xc0000, &ram_lo);
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if (above_4g_mem_size > 0) {
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memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi",
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&ram_memory, 0x100000000ULL,
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above_4g_mem_size);
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memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi);
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}
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}
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void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
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{
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unsigned long nr_pfn;
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xen_pfn_t *pfn_list;
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int i;
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if (runstate_check(RUN_STATE_INMIGRATE)) {
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/* RAM already populated in Xen */
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fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT
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" bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n",
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__func__, size, ram_addr);
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return;
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}
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if (mr == &ram_memory) {
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return;
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}
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trace_xen_ram_alloc(ram_addr, size);
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nr_pfn = size >> TARGET_PAGE_BITS;
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pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn);
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for (i = 0; i < nr_pfn; i++) {
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pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i;
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}
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if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) {
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hw_error("xen: failed to populate ram at " RAM_ADDR_FMT, ram_addr);
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}
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g_free(pfn_list);
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}
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static XenPhysmap *get_physmapping(XenIOState *state,
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hwaddr start_addr, ram_addr_t size)
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{
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XenPhysmap *physmap = NULL;
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start_addr &= TARGET_PAGE_MASK;
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QLIST_FOREACH(physmap, &state->physmap, list) {
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if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) {
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return physmap;
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}
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}
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return NULL;
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}
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static hwaddr xen_phys_offset_to_gaddr(hwaddr start_addr,
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ram_addr_t size, void *opaque)
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{
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hwaddr addr = start_addr & TARGET_PAGE_MASK;
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XenIOState *xen_io_state = opaque;
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XenPhysmap *physmap = NULL;
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QLIST_FOREACH(physmap, &xen_io_state->physmap, list) {
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if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) {
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return physmap->start_addr;
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}
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}
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return start_addr;
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}
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
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static int xen_add_to_physmap(XenIOState *state,
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hwaddr start_addr,
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ram_addr_t size,
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MemoryRegion *mr,
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hwaddr offset_within_region)
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{
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unsigned long i = 0;
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int rc = 0;
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XenPhysmap *physmap = NULL;
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hwaddr pfn, start_gpfn;
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hwaddr phys_offset = memory_region_get_ram_addr(mr);
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char path[80], value[17];
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if (get_physmapping(state, start_addr, size)) {
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return 0;
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}
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if (size <= 0) {
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return -1;
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}
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/* Xen can only handle a single dirty log region for now and we want
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* the linear framebuffer to be that region.
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* Avoid tracking any regions that is not videoram and avoid tracking
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* the legacy vga region. */
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if (mr == framebuffer && start_addr > 0xbffff) {
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goto go_physmap;
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}
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return -1;
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go_physmap:
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DPRINTF("mapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx"\n",
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start_addr, start_addr + size);
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pfn = phys_offset >> TARGET_PAGE_BITS;
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start_gpfn = start_addr >> TARGET_PAGE_BITS;
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for (i = 0; i < size >> TARGET_PAGE_BITS; i++) {
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unsigned long idx = pfn + i;
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xen_pfn_t gpfn = start_gpfn + i;
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rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
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if (rc) {
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DPRINTF("add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
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PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
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return -rc;
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}
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}
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physmap = g_malloc(sizeof (XenPhysmap));
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physmap->start_addr = start_addr;
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physmap->size = size;
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physmap->name = (char *)mr->name;
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physmap->phys_offset = phys_offset;
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QLIST_INSERT_HEAD(&state->physmap, physmap, list);
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xc_domain_pin_memory_cacheattr(xen_xc, xen_domid,
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start_addr >> TARGET_PAGE_BITS,
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(start_addr + size) >> TARGET_PAGE_BITS,
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XEN_DOMCTL_MEM_CACHEATTR_WB);
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snprintf(path, sizeof(path),
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"/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr",
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xen_domid, (uint64_t)phys_offset);
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snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)start_addr);
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if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
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return -1;
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}
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snprintf(path, sizeof(path),
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"/local/domain/0/device-model/%d/physmap/%"PRIx64"/size",
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xen_domid, (uint64_t)phys_offset);
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snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)size);
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if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
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return -1;
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}
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if (mr->name) {
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snprintf(path, sizeof(path),
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"/local/domain/0/device-model/%d/physmap/%"PRIx64"/name",
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xen_domid, (uint64_t)phys_offset);
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if (!xs_write(state->xenstore, 0, path, mr->name, strlen(mr->name))) {
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return -1;
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}
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}
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return 0;
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}
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static int xen_remove_from_physmap(XenIOState *state,
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hwaddr start_addr,
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ram_addr_t size)
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{
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unsigned long i = 0;
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int rc = 0;
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XenPhysmap *physmap = NULL;
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hwaddr phys_offset = 0;
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physmap = get_physmapping(state, start_addr, size);
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if (physmap == NULL) {
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return -1;
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}
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phys_offset = physmap->phys_offset;
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size = physmap->size;
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DPRINTF("unmapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx", at "
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"%"HWADDR_PRIx"\n", start_addr, start_addr + size, phys_offset);
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size >>= TARGET_PAGE_BITS;
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start_addr >>= TARGET_PAGE_BITS;
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phys_offset >>= TARGET_PAGE_BITS;
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for (i = 0; i < size; i++) {
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unsigned long idx = start_addr + i;
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xen_pfn_t gpfn = phys_offset + i;
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rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
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if (rc) {
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fprintf(stderr, "add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
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PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
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return -rc;
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}
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}
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QLIST_REMOVE(physmap, list);
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if (state->log_for_dirtybit == physmap) {
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state->log_for_dirtybit = NULL;
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}
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g_free(physmap);
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return 0;
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}
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#else
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static int xen_add_to_physmap(XenIOState *state,
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hwaddr start_addr,
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ram_addr_t size,
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MemoryRegion *mr,
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hwaddr offset_within_region)
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{
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return -ENOSYS;
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}
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static int xen_remove_from_physmap(XenIOState *state,
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hwaddr start_addr,
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ram_addr_t size)
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{
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return -ENOSYS;
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}
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#endif
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static void xen_set_memory(struct MemoryListener *listener,
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MemoryRegionSection *section,
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bool add)
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{
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XenIOState *state = container_of(listener, XenIOState, memory_listener);
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hwaddr start_addr = section->offset_within_address_space;
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ram_addr_t size = int128_get64(section->size);
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bool log_dirty = memory_region_is_logging(section->mr);
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hvmmem_type_t mem_type;
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if (!memory_region_is_ram(section->mr)) {
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return;
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}
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if (!(section->mr != &ram_memory
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&& ( (log_dirty && add) || (!log_dirty && !add)))) {
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return;
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}
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trace_xen_client_set_memory(start_addr, size, log_dirty);
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start_addr &= TARGET_PAGE_MASK;
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size = TARGET_PAGE_ALIGN(size);
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if (add) {
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if (!memory_region_is_rom(section->mr)) {
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xen_add_to_physmap(state, start_addr, size,
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section->mr, section->offset_within_region);
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} else {
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mem_type = HVMMEM_ram_ro;
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if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type,
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start_addr >> TARGET_PAGE_BITS,
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size >> TARGET_PAGE_BITS)) {
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DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx"\n",
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start_addr);
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}
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}
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} else {
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if (xen_remove_from_physmap(state, start_addr, size) < 0) {
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DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr);
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}
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}
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}
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static void xen_region_add(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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memory_region_ref(section->mr);
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xen_set_memory(listener, section, true);
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}
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static void xen_region_del(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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xen_set_memory(listener, section, false);
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memory_region_unref(section->mr);
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}
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static void xen_sync_dirty_bitmap(XenIOState *state,
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hwaddr start_addr,
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ram_addr_t size)
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{
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hwaddr npages = size >> TARGET_PAGE_BITS;
|
|
const int width = sizeof(unsigned long) * 8;
|
|
unsigned long bitmap[(npages + width - 1) / width];
|
|
int rc, i, j;
|
|
const XenPhysmap *physmap = NULL;
|
|
|
|
physmap = get_physmapping(state, start_addr, size);
|
|
if (physmap == NULL) {
|
|
/* not handled */
|
|
return;
|
|
}
|
|
|
|
if (state->log_for_dirtybit == NULL) {
|
|
state->log_for_dirtybit = physmap;
|
|
} else if (state->log_for_dirtybit != physmap) {
|
|
/* Only one range for dirty bitmap can be tracked. */
|
|
return;
|
|
}
|
|
|
|
rc = xc_hvm_track_dirty_vram(xen_xc, xen_domid,
|
|
start_addr >> TARGET_PAGE_BITS, npages,
|
|
bitmap);
|
|
if (rc < 0) {
|
|
if (rc != -ENODATA) {
|
|
memory_region_set_dirty(framebuffer, 0, size);
|
|
DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
|
|
", 0x" TARGET_FMT_plx "): %s\n",
|
|
start_addr, start_addr + size, strerror(-rc));
|
|
}
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(bitmap); i++) {
|
|
unsigned long map = bitmap[i];
|
|
while (map != 0) {
|
|
j = ffsl(map) - 1;
|
|
map &= ~(1ul << j);
|
|
memory_region_set_dirty(framebuffer,
|
|
(i * width + j) * TARGET_PAGE_SIZE,
|
|
TARGET_PAGE_SIZE);
|
|
};
|
|
}
|
|
}
|
|
|
|
static void xen_log_start(MemoryListener *listener,
|
|
MemoryRegionSection *section)
|
|
{
|
|
XenIOState *state = container_of(listener, XenIOState, memory_listener);
|
|
|
|
xen_sync_dirty_bitmap(state, section->offset_within_address_space,
|
|
int128_get64(section->size));
|
|
}
|
|
|
|
static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section)
|
|
{
|
|
XenIOState *state = container_of(listener, XenIOState, memory_listener);
|
|
|
|
state->log_for_dirtybit = NULL;
|
|
/* Disable dirty bit tracking */
|
|
xc_hvm_track_dirty_vram(xen_xc, xen_domid, 0, 0, NULL);
|
|
}
|
|
|
|
static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section)
|
|
{
|
|
XenIOState *state = container_of(listener, XenIOState, memory_listener);
|
|
|
|
xen_sync_dirty_bitmap(state, section->offset_within_address_space,
|
|
int128_get64(section->size));
|
|
}
|
|
|
|
static void xen_log_global_start(MemoryListener *listener)
|
|
{
|
|
if (xen_enabled()) {
|
|
xen_in_migration = true;
|
|
}
|
|
}
|
|
|
|
static void xen_log_global_stop(MemoryListener *listener)
|
|
{
|
|
xen_in_migration = false;
|
|
}
|
|
|
|
static MemoryListener xen_memory_listener = {
|
|
.region_add = xen_region_add,
|
|
.region_del = xen_region_del,
|
|
.log_start = xen_log_start,
|
|
.log_stop = xen_log_stop,
|
|
.log_sync = xen_log_sync,
|
|
.log_global_start = xen_log_global_start,
|
|
.log_global_stop = xen_log_global_stop,
|
|
.priority = 10,
|
|
};
|
|
|
|
void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
|
|
{
|
|
if (enable) {
|
|
memory_global_dirty_log_start();
|
|
} else {
|
|
memory_global_dirty_log_stop();
|
|
}
|
|
}
|
|
|
|
/* get the ioreq packets from share mem */
|
|
static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu)
|
|
{
|
|
ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu);
|
|
|
|
if (req->state != STATE_IOREQ_READY) {
|
|
DPRINTF("I/O request not ready: "
|
|
"%x, ptr: %x, port: %"PRIx64", "
|
|
"data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
|
|
req->state, req->data_is_ptr, req->addr,
|
|
req->data, req->count, req->size);
|
|
return NULL;
|
|
}
|
|
|
|
xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
|
|
|
|
req->state = STATE_IOREQ_INPROCESS;
|
|
return req;
|
|
}
|
|
|
|
/* use poll to get the port notification */
|
|
/* ioreq_vec--out,the */
|
|
/* retval--the number of ioreq packet */
|
|
static ioreq_t *cpu_get_ioreq(XenIOState *state)
|
|
{
|
|
int i;
|
|
evtchn_port_t port;
|
|
|
|
port = xc_evtchn_pending(state->xce_handle);
|
|
if (port == state->bufioreq_local_port) {
|
|
timer_mod(state->buffered_io_timer,
|
|
BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
|
|
return NULL;
|
|
}
|
|
|
|
if (port != -1) {
|
|
for (i = 0; i < max_cpus; i++) {
|
|
if (state->ioreq_local_port[i] == port) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == max_cpus) {
|
|
hw_error("Fatal error while trying to get io event!\n");
|
|
}
|
|
|
|
/* unmask the wanted port again */
|
|
xc_evtchn_unmask(state->xce_handle, port);
|
|
|
|
/* get the io packet from shared memory */
|
|
state->send_vcpu = i;
|
|
return cpu_get_ioreq_from_shared_memory(state, i);
|
|
}
|
|
|
|
/* read error or read nothing */
|
|
return NULL;
|
|
}
|
|
|
|
static uint32_t do_inp(pio_addr_t addr, unsigned long size)
|
|
{
|
|
switch (size) {
|
|
case 1:
|
|
return cpu_inb(addr);
|
|
case 2:
|
|
return cpu_inw(addr);
|
|
case 4:
|
|
return cpu_inl(addr);
|
|
default:
|
|
hw_error("inp: bad size: %04"FMT_pioaddr" %lx", addr, size);
|
|
}
|
|
}
|
|
|
|
static void do_outp(pio_addr_t addr,
|
|
unsigned long size, uint32_t val)
|
|
{
|
|
switch (size) {
|
|
case 1:
|
|
return cpu_outb(addr, val);
|
|
case 2:
|
|
return cpu_outw(addr, val);
|
|
case 4:
|
|
return cpu_outl(addr, val);
|
|
default:
|
|
hw_error("outp: bad size: %04"FMT_pioaddr" %lx", addr, size);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Helper functions which read/write an object from/to physical guest
|
|
* memory, as part of the implementation of an ioreq.
|
|
*
|
|
* Equivalent to
|
|
* cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
|
|
* val, req->size, 0/1)
|
|
* except without the integer overflow problems.
|
|
*/
|
|
static void rw_phys_req_item(hwaddr addr,
|
|
ioreq_t *req, uint32_t i, void *val, int rw)
|
|
{
|
|
/* Do everything unsigned so overflow just results in a truncated result
|
|
* and accesses to undesired parts of guest memory, which is up
|
|
* to the guest */
|
|
hwaddr offset = (hwaddr)req->size * i;
|
|
if (req->df) {
|
|
addr -= offset;
|
|
} else {
|
|
addr += offset;
|
|
}
|
|
cpu_physical_memory_rw(addr, val, req->size, rw);
|
|
}
|
|
|
|
static inline void read_phys_req_item(hwaddr addr,
|
|
ioreq_t *req, uint32_t i, void *val)
|
|
{
|
|
rw_phys_req_item(addr, req, i, val, 0);
|
|
}
|
|
static inline void write_phys_req_item(hwaddr addr,
|
|
ioreq_t *req, uint32_t i, void *val)
|
|
{
|
|
rw_phys_req_item(addr, req, i, val, 1);
|
|
}
|
|
|
|
|
|
static void cpu_ioreq_pio(ioreq_t *req)
|
|
{
|
|
uint32_t i;
|
|
|
|
if (req->dir == IOREQ_READ) {
|
|
if (!req->data_is_ptr) {
|
|
req->data = do_inp(req->addr, req->size);
|
|
} else {
|
|
uint32_t tmp;
|
|
|
|
for (i = 0; i < req->count; i++) {
|
|
tmp = do_inp(req->addr, req->size);
|
|
write_phys_req_item(req->data, req, i, &tmp);
|
|
}
|
|
}
|
|
} else if (req->dir == IOREQ_WRITE) {
|
|
if (!req->data_is_ptr) {
|
|
do_outp(req->addr, req->size, req->data);
|
|
} else {
|
|
for (i = 0; i < req->count; i++) {
|
|
uint32_t tmp = 0;
|
|
|
|
read_phys_req_item(req->data, req, i, &tmp);
|
|
do_outp(req->addr, req->size, tmp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void cpu_ioreq_move(ioreq_t *req)
|
|
{
|
|
uint32_t i;
|
|
|
|
if (!req->data_is_ptr) {
|
|
if (req->dir == IOREQ_READ) {
|
|
for (i = 0; i < req->count; i++) {
|
|
read_phys_req_item(req->addr, req, i, &req->data);
|
|
}
|
|
} else if (req->dir == IOREQ_WRITE) {
|
|
for (i = 0; i < req->count; i++) {
|
|
write_phys_req_item(req->addr, req, i, &req->data);
|
|
}
|
|
}
|
|
} else {
|
|
uint64_t tmp;
|
|
|
|
if (req->dir == IOREQ_READ) {
|
|
for (i = 0; i < req->count; i++) {
|
|
read_phys_req_item(req->addr, req, i, &tmp);
|
|
write_phys_req_item(req->data, req, i, &tmp);
|
|
}
|
|
} else if (req->dir == IOREQ_WRITE) {
|
|
for (i = 0; i < req->count; i++) {
|
|
read_phys_req_item(req->data, req, i, &tmp);
|
|
write_phys_req_item(req->addr, req, i, &tmp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void handle_ioreq(ioreq_t *req)
|
|
{
|
|
if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
|
|
(req->size < sizeof (target_ulong))) {
|
|
req->data &= ((target_ulong) 1 << (8 * req->size)) - 1;
|
|
}
|
|
|
|
switch (req->type) {
|
|
case IOREQ_TYPE_PIO:
|
|
cpu_ioreq_pio(req);
|
|
break;
|
|
case IOREQ_TYPE_COPY:
|
|
cpu_ioreq_move(req);
|
|
break;
|
|
case IOREQ_TYPE_TIMEOFFSET:
|
|
break;
|
|
case IOREQ_TYPE_INVALIDATE:
|
|
xen_invalidate_map_cache();
|
|
break;
|
|
default:
|
|
hw_error("Invalid ioreq type 0x%x\n", req->type);
|
|
}
|
|
}
|
|
|
|
static int handle_buffered_iopage(XenIOState *state)
|
|
{
|
|
buf_ioreq_t *buf_req = NULL;
|
|
ioreq_t req;
|
|
int qw;
|
|
|
|
if (!state->buffered_io_page) {
|
|
return 0;
|
|
}
|
|
|
|
memset(&req, 0x00, sizeof(req));
|
|
|
|
while (state->buffered_io_page->read_pointer != state->buffered_io_page->write_pointer) {
|
|
buf_req = &state->buffered_io_page->buf_ioreq[
|
|
state->buffered_io_page->read_pointer % IOREQ_BUFFER_SLOT_NUM];
|
|
req.size = 1UL << buf_req->size;
|
|
req.count = 1;
|
|
req.addr = buf_req->addr;
|
|
req.data = buf_req->data;
|
|
req.state = STATE_IOREQ_READY;
|
|
req.dir = buf_req->dir;
|
|
req.df = 1;
|
|
req.type = buf_req->type;
|
|
req.data_is_ptr = 0;
|
|
qw = (req.size == 8);
|
|
if (qw) {
|
|
buf_req = &state->buffered_io_page->buf_ioreq[
|
|
(state->buffered_io_page->read_pointer + 1) % IOREQ_BUFFER_SLOT_NUM];
|
|
req.data |= ((uint64_t)buf_req->data) << 32;
|
|
}
|
|
|
|
handle_ioreq(&req);
|
|
|
|
xen_mb();
|
|
state->buffered_io_page->read_pointer += qw ? 2 : 1;
|
|
}
|
|
|
|
return req.count;
|
|
}
|
|
|
|
static void handle_buffered_io(void *opaque)
|
|
{
|
|
XenIOState *state = opaque;
|
|
|
|
if (handle_buffered_iopage(state)) {
|
|
timer_mod(state->buffered_io_timer,
|
|
BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
|
|
} else {
|
|
timer_del(state->buffered_io_timer);
|
|
xc_evtchn_unmask(state->xce_handle, state->bufioreq_local_port);
|
|
}
|
|
}
|
|
|
|
static void cpu_handle_ioreq(void *opaque)
|
|
{
|
|
XenIOState *state = opaque;
|
|
ioreq_t *req = cpu_get_ioreq(state);
|
|
|
|
handle_buffered_iopage(state);
|
|
if (req) {
|
|
handle_ioreq(req);
|
|
|
|
if (req->state != STATE_IOREQ_INPROCESS) {
|
|
fprintf(stderr, "Badness in I/O request ... not in service?!: "
|
|
"%x, ptr: %x, port: %"PRIx64", "
|
|
"data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
|
|
req->state, req->data_is_ptr, req->addr,
|
|
req->data, req->count, req->size);
|
|
destroy_hvm_domain(false);
|
|
return;
|
|
}
|
|
|
|
xen_wmb(); /* Update ioreq contents /then/ update state. */
|
|
|
|
/*
|
|
* We do this before we send the response so that the tools
|
|
* have the opportunity to pick up on the reset before the
|
|
* guest resumes and does a hlt with interrupts disabled which
|
|
* causes Xen to powerdown the domain.
|
|
*/
|
|
if (runstate_is_running()) {
|
|
if (qemu_shutdown_requested_get()) {
|
|
destroy_hvm_domain(false);
|
|
}
|
|
if (qemu_reset_requested_get()) {
|
|
qemu_system_reset(VMRESET_REPORT);
|
|
destroy_hvm_domain(true);
|
|
}
|
|
}
|
|
|
|
req->state = STATE_IORESP_READY;
|
|
xc_evtchn_notify(state->xce_handle, state->ioreq_local_port[state->send_vcpu]);
|
|
}
|
|
}
|
|
|
|
static int store_dev_info(int domid, CharDriverState *cs, const char *string)
|
|
{
|
|
struct xs_handle *xs = NULL;
|
|
char *path = NULL;
|
|
char *newpath = NULL;
|
|
char *pts = NULL;
|
|
int ret = -1;
|
|
|
|
/* Only continue if we're talking to a pty. */
|
|
if (strncmp(cs->filename, "pty:", 4)) {
|
|
return 0;
|
|
}
|
|
pts = cs->filename + 4;
|
|
|
|
/* We now have everything we need to set the xenstore entry. */
|
|
xs = xs_open(0);
|
|
if (xs == NULL) {
|
|
fprintf(stderr, "Could not contact XenStore\n");
|
|
goto out;
|
|
}
|
|
|
|
path = xs_get_domain_path(xs, domid);
|
|
if (path == NULL) {
|
|
fprintf(stderr, "xs_get_domain_path() error\n");
|
|
goto out;
|
|
}
|
|
newpath = realloc(path, (strlen(path) + strlen(string) +
|
|
strlen("/tty") + 1));
|
|
if (newpath == NULL) {
|
|
fprintf(stderr, "realloc error\n");
|
|
goto out;
|
|
}
|
|
path = newpath;
|
|
|
|
strcat(path, string);
|
|
strcat(path, "/tty");
|
|
if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
|
|
fprintf(stderr, "xs_write for '%s' fail", string);
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
|
|
out:
|
|
free(path);
|
|
xs_close(xs);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void xenstore_store_pv_console_info(int i, CharDriverState *chr)
|
|
{
|
|
if (i == 0) {
|
|
store_dev_info(xen_domid, chr, "/console");
|
|
} else {
|
|
char buf[32];
|
|
snprintf(buf, sizeof(buf), "/device/console/%d", i);
|
|
store_dev_info(xen_domid, chr, buf);
|
|
}
|
|
}
|
|
|
|
static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
|
|
{
|
|
char path[50];
|
|
|
|
if (xs == NULL) {
|
|
fprintf(stderr, "xenstore connection not initialized\n");
|
|
exit(1);
|
|
}
|
|
|
|
snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
|
|
if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
|
|
fprintf(stderr, "error recording dm state\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static void xen_main_loop_prepare(XenIOState *state)
|
|
{
|
|
int evtchn_fd = -1;
|
|
|
|
if (state->xce_handle != XC_HANDLER_INITIAL_VALUE) {
|
|
evtchn_fd = xc_evtchn_fd(state->xce_handle);
|
|
}
|
|
|
|
state->buffered_io_timer = timer_new_ms(QEMU_CLOCK_REALTIME, handle_buffered_io,
|
|
state);
|
|
|
|
if (evtchn_fd != -1) {
|
|
qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state);
|
|
}
|
|
}
|
|
|
|
|
|
/* Initialise Xen */
|
|
|
|
static void xen_change_state_handler(void *opaque, int running,
|
|
RunState state)
|
|
{
|
|
if (running) {
|
|
/* record state running */
|
|
xenstore_record_dm_state(xenstore, "running");
|
|
}
|
|
}
|
|
|
|
static void xen_hvm_change_state_handler(void *opaque, int running,
|
|
RunState rstate)
|
|
{
|
|
XenIOState *xstate = opaque;
|
|
if (running) {
|
|
xen_main_loop_prepare(xstate);
|
|
}
|
|
}
|
|
|
|
static void xen_exit_notifier(Notifier *n, void *data)
|
|
{
|
|
XenIOState *state = container_of(n, XenIOState, exit);
|
|
|
|
xc_evtchn_close(state->xce_handle);
|
|
xs_daemon_close(state->xenstore);
|
|
}
|
|
|
|
int xen_init(MachineClass *mc)
|
|
{
|
|
xen_xc = xen_xc_interface_open(0, 0, 0);
|
|
if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
|
|
xen_be_printf(NULL, 0, "can't open xen interface\n");
|
|
return -1;
|
|
}
|
|
qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void xen_read_physmap(XenIOState *state)
|
|
{
|
|
XenPhysmap *physmap = NULL;
|
|
unsigned int len, num, i;
|
|
char path[80], *value = NULL;
|
|
char **entries = NULL;
|
|
|
|
snprintf(path, sizeof(path),
|
|
"/local/domain/0/device-model/%d/physmap", xen_domid);
|
|
entries = xs_directory(state->xenstore, 0, path, &num);
|
|
if (entries == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
physmap = g_malloc(sizeof (XenPhysmap));
|
|
physmap->phys_offset = strtoull(entries[i], NULL, 16);
|
|
snprintf(path, sizeof(path),
|
|
"/local/domain/0/device-model/%d/physmap/%s/start_addr",
|
|
xen_domid, entries[i]);
|
|
value = xs_read(state->xenstore, 0, path, &len);
|
|
if (value == NULL) {
|
|
g_free(physmap);
|
|
continue;
|
|
}
|
|
physmap->start_addr = strtoull(value, NULL, 16);
|
|
free(value);
|
|
|
|
snprintf(path, sizeof(path),
|
|
"/local/domain/0/device-model/%d/physmap/%s/size",
|
|
xen_domid, entries[i]);
|
|
value = xs_read(state->xenstore, 0, path, &len);
|
|
if (value == NULL) {
|
|
g_free(physmap);
|
|
continue;
|
|
}
|
|
physmap->size = strtoull(value, NULL, 16);
|
|
free(value);
|
|
|
|
snprintf(path, sizeof(path),
|
|
"/local/domain/0/device-model/%d/physmap/%s/name",
|
|
xen_domid, entries[i]);
|
|
physmap->name = xs_read(state->xenstore, 0, path, &len);
|
|
|
|
QLIST_INSERT_HEAD(&state->physmap, physmap, list);
|
|
}
|
|
free(entries);
|
|
}
|
|
|
|
static void xen_wakeup_notifier(Notifier *notifier, void *data)
|
|
{
|
|
xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 0);
|
|
}
|
|
|
|
int xen_hvm_init(MemoryRegion **ram_memory)
|
|
{
|
|
int i, rc;
|
|
unsigned long ioreq_pfn;
|
|
unsigned long bufioreq_evtchn;
|
|
XenIOState *state;
|
|
|
|
state = g_malloc0(sizeof (XenIOState));
|
|
|
|
state->xce_handle = xen_xc_evtchn_open(NULL, 0);
|
|
if (state->xce_handle == XC_HANDLER_INITIAL_VALUE) {
|
|
perror("xen: event channel open");
|
|
g_free(state);
|
|
return -errno;
|
|
}
|
|
|
|
state->xenstore = xs_daemon_open();
|
|
if (state->xenstore == NULL) {
|
|
perror("xen: xenstore open");
|
|
g_free(state);
|
|
return -errno;
|
|
}
|
|
|
|
state->exit.notify = xen_exit_notifier;
|
|
qemu_add_exit_notifier(&state->exit);
|
|
|
|
state->suspend.notify = xen_suspend_notifier;
|
|
qemu_register_suspend_notifier(&state->suspend);
|
|
|
|
state->wakeup.notify = xen_wakeup_notifier;
|
|
qemu_register_wakeup_notifier(&state->wakeup);
|
|
|
|
xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_IOREQ_PFN, &ioreq_pfn);
|
|
DPRINTF("shared page at pfn %lx\n", ioreq_pfn);
|
|
state->shared_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
|
|
PROT_READ|PROT_WRITE, ioreq_pfn);
|
|
if (state->shared_page == NULL) {
|
|
hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT,
|
|
errno, xen_xc);
|
|
}
|
|
|
|
xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_PFN, &ioreq_pfn);
|
|
DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn);
|
|
state->buffered_io_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
|
|
PROT_READ|PROT_WRITE, ioreq_pfn);
|
|
if (state->buffered_io_page == NULL) {
|
|
hw_error("map buffered IO page returned error %d", errno);
|
|
}
|
|
|
|
state->ioreq_local_port = g_malloc0(max_cpus * sizeof (evtchn_port_t));
|
|
|
|
/* FIXME: how about if we overflow the page here? */
|
|
for (i = 0; i < max_cpus; i++) {
|
|
rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
|
|
xen_vcpu_eport(state->shared_page, i));
|
|
if (rc == -1) {
|
|
fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
|
|
return -1;
|
|
}
|
|
state->ioreq_local_port[i] = rc;
|
|
}
|
|
|
|
rc = xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_EVTCHN,
|
|
&bufioreq_evtchn);
|
|
if (rc < 0) {
|
|
fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_EVTCHN\n");
|
|
return -1;
|
|
}
|
|
rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
|
|
(uint32_t)bufioreq_evtchn);
|
|
if (rc == -1) {
|
|
fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
|
|
return -1;
|
|
}
|
|
state->bufioreq_local_port = rc;
|
|
|
|
/* Init RAM management */
|
|
xen_map_cache_init(xen_phys_offset_to_gaddr, state);
|
|
xen_ram_init(ram_size, ram_memory);
|
|
|
|
qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);
|
|
|
|
state->memory_listener = xen_memory_listener;
|
|
QLIST_INIT(&state->physmap);
|
|
memory_listener_register(&state->memory_listener, &address_space_memory);
|
|
state->log_for_dirtybit = NULL;
|
|
|
|
/* Initialize backend core & drivers */
|
|
if (xen_be_init() != 0) {
|
|
fprintf(stderr, "%s: xen backend core setup failed\n", __FUNCTION__);
|
|
exit(1);
|
|
}
|
|
xen_be_register("console", &xen_console_ops);
|
|
xen_be_register("vkbd", &xen_kbdmouse_ops);
|
|
xen_be_register("qdisk", &xen_blkdev_ops);
|
|
xen_read_physmap(state);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void destroy_hvm_domain(bool reboot)
|
|
{
|
|
XenXC xc_handle;
|
|
int sts;
|
|
|
|
xc_handle = xen_xc_interface_open(0, 0, 0);
|
|
if (xc_handle == XC_HANDLER_INITIAL_VALUE) {
|
|
fprintf(stderr, "Cannot acquire xenctrl handle\n");
|
|
} else {
|
|
sts = xc_domain_shutdown(xc_handle, xen_domid,
|
|
reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff);
|
|
if (sts != 0) {
|
|
fprintf(stderr, "xc_domain_shutdown failed to issue %s, "
|
|
"sts %d, %s\n", reboot ? "reboot" : "poweroff",
|
|
sts, strerror(errno));
|
|
} else {
|
|
fprintf(stderr, "Issued domain %d %s\n", xen_domid,
|
|
reboot ? "reboot" : "poweroff");
|
|
}
|
|
xc_interface_close(xc_handle);
|
|
}
|
|
}
|
|
|
|
void xen_register_framebuffer(MemoryRegion *mr)
|
|
{
|
|
framebuffer = mr;
|
|
}
|
|
|
|
void xen_shutdown_fatal_error(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, "Will destroy the domain.\n");
|
|
/* destroy the domain */
|
|
qemu_system_shutdown_request();
|
|
}
|
|
|
|
void xen_modified_memory(ram_addr_t start, ram_addr_t length)
|
|
{
|
|
if (unlikely(xen_in_migration)) {
|
|
int rc;
|
|
ram_addr_t start_pfn, nb_pages;
|
|
|
|
if (length == 0) {
|
|
length = TARGET_PAGE_SIZE;
|
|
}
|
|
start_pfn = start >> TARGET_PAGE_BITS;
|
|
nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS)
|
|
- start_pfn;
|
|
rc = xc_hvm_modified_memory(xen_xc, xen_domid, start_pfn, nb_pages);
|
|
if (rc) {
|
|
fprintf(stderr,
|
|
"%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n",
|
|
__func__, start, nb_pages, rc, strerror(-rc));
|
|
}
|
|
}
|
|
}
|