1da41cc1c6
Support creating the ARM vgic device through the device control API and setting the base address for the distributor and cpu interfaces in KVM VMs using this API. Because the older KVM_CREATE_IRQCHIP interface needs the irq chip to be created prior to creating the VCPUs, we first test if we can use the device control API in kvm_arch_irqchip_create (using the test flag from the device control API). If we cannot, it means we have to fall back to KVM_CREATE_IRQCHIP and use the older ioctl at this point in time. If however, we can use the device control API, we don't do anything and wait until the arm_gic_kvm driver initializes and let that use the device control API. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Message-id: 1392687720-26806-5-git-send-email-christoffer.dall@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/*
|
|
* QEMU KVM support -- ARM specific functions.
|
|
*
|
|
* Copyright (c) 2012 Linaro Limited
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef QEMU_KVM_ARM_H
|
|
#define QEMU_KVM_ARM_H
|
|
|
|
#include "sysemu/kvm.h"
|
|
#include "exec/memory.h"
|
|
|
|
/**
|
|
* kvm_arm_register_device:
|
|
* @mr: memory region for this device
|
|
* @devid: the KVM device ID
|
|
* @group: device control API group for setting addresses
|
|
* @attr: device control API address type
|
|
* @dev_fd: device control device file descriptor (or -1 if not supported)
|
|
*
|
|
* Remember the memory region @mr, and when it is mapped by the
|
|
* machine model, tell the kernel that base address using the
|
|
* KVM_ARM_SET_DEVICE_ADDRESS ioctl or the newer device control API. @devid
|
|
* should be the ID of the device as defined by KVM_ARM_SET_DEVICE_ADDRESS or
|
|
* the arm-vgic device in the device control API.
|
|
* The machine model may map
|
|
* and unmap the device multiple times; the kernel will only be told the final
|
|
* address at the point where machine init is complete.
|
|
*/
|
|
void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid, uint64_t group,
|
|
uint64_t attr, int dev_fd);
|
|
|
|
/**
|
|
* write_list_to_kvmstate:
|
|
* @cpu: ARMCPU
|
|
*
|
|
* For each register listed in the ARMCPU cpreg_indexes list, write
|
|
* its value from the cpreg_values list into the kernel (via ioctl).
|
|
* This updates KVM's working data structures from TCG data or
|
|
* from incoming migration state.
|
|
*
|
|
* Returns: true if all register values were updated correctly,
|
|
* false if some register was unknown to the kernel or could not
|
|
* be written (eg constant register with the wrong value).
|
|
* Note that we do not stop early on failure -- we will attempt
|
|
* writing all registers in the list.
|
|
*/
|
|
bool write_list_to_kvmstate(ARMCPU *cpu);
|
|
|
|
/**
|
|
* write_kvmstate_to_list:
|
|
* @cpu: ARMCPU
|
|
*
|
|
* For each register listed in the ARMCPU cpreg_indexes list, write
|
|
* its value from the kernel into the cpreg_values list. This is used to
|
|
* copy info from KVM's working data structures into TCG or
|
|
* for outbound migration.
|
|
*
|
|
* Returns: true if all register values were read correctly,
|
|
* false if some register was unknown or could not be read.
|
|
* Note that we do not stop early on failure -- we will attempt
|
|
* reading all registers in the list.
|
|
*/
|
|
bool write_kvmstate_to_list(ARMCPU *cpu);
|
|
|
|
#ifdef CONFIG_KVM
|
|
/**
|
|
* kvm_arm_create_scratch_host_vcpu:
|
|
* @cpus_to_try: array of QEMU_KVM_ARM_TARGET_* values (terminated with
|
|
* QEMU_KVM_ARM_TARGET_NONE) to try as fallback if the kernel does not
|
|
* know the PREFERRED_TARGET ioctl
|
|
* @fdarray: filled in with kvmfd, vmfd, cpufd file descriptors in that order
|
|
* @init: filled in with the necessary values for creating a host vcpu
|
|
*
|
|
* Create a scratch vcpu in its own VM of the type preferred by the host
|
|
* kernel (as would be used for '-cpu host'), for purposes of probing it
|
|
* for capabilities.
|
|
*
|
|
* Returns: true on success (and fdarray and init are filled in),
|
|
* false on failure (and fdarray and init are not valid).
|
|
*/
|
|
bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try,
|
|
int *fdarray,
|
|
struct kvm_vcpu_init *init);
|
|
|
|
/**
|
|
* kvm_arm_destroy_scratch_host_vcpu:
|
|
* @fdarray: array of fds as set up by kvm_arm_create_scratch_host_vcpu
|
|
*
|
|
* Tear down the scratch vcpu created by kvm_arm_create_scratch_host_vcpu.
|
|
*/
|
|
void kvm_arm_destroy_scratch_host_vcpu(int *fdarray);
|
|
|
|
#define TYPE_ARM_HOST_CPU "host-" TYPE_ARM_CPU
|
|
#define ARM_HOST_CPU_CLASS(klass) \
|
|
OBJECT_CLASS_CHECK(ARMHostCPUClass, (klass), TYPE_ARM_HOST_CPU)
|
|
#define ARM_HOST_CPU_GET_CLASS(obj) \
|
|
OBJECT_GET_CLASS(ARMHostCPUClass, (obj), TYPE_ARM_HOST_CPU)
|
|
|
|
typedef struct ARMHostCPUClass {
|
|
/*< private >*/
|
|
ARMCPUClass parent_class;
|
|
/*< public >*/
|
|
|
|
uint64_t features;
|
|
uint32_t target;
|
|
const char *dtb_compatible;
|
|
} ARMHostCPUClass;
|
|
|
|
/**
|
|
* kvm_arm_get_host_cpu_features:
|
|
* @ahcc: ARMHostCPUClass to fill in
|
|
*
|
|
* Probe the capabilities of the host kernel's preferred CPU and fill
|
|
* in the ARMHostCPUClass struct accordingly.
|
|
*/
|
|
bool kvm_arm_get_host_cpu_features(ARMHostCPUClass *ahcc);
|
|
|
|
#endif
|
|
|
|
#endif
|