481 lines
13 KiB
C
481 lines
13 KiB
C
/*
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* QEMU KVM support -- ARM specific functions.
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*
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* Copyright (c) 2012 Linaro Limited
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_KVM_ARM_H
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#define QEMU_KVM_ARM_H
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#include "sysemu/kvm.h"
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#include "exec/memory.h"
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#include "qemu/error-report.h"
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#define KVM_ARM_VGIC_V2 (1 << 0)
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#define KVM_ARM_VGIC_V3 (1 << 1)
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/**
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* kvm_arm_vcpu_init:
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* @cs: CPUState
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*
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* Initialize (or reinitialize) the VCPU by invoking the
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* KVM_ARM_VCPU_INIT ioctl with the CPU type and feature
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* bitmask specified in the CPUState.
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*
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* Returns: 0 if success else < 0 error code
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*/
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int kvm_arm_vcpu_init(CPUState *cs);
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/**
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* kvm_arm_vcpu_finalize:
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* @cs: CPUState
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* @feature: feature to finalize
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*
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* Finalizes the configuration of the specified VCPU feature by
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* invoking the KVM_ARM_VCPU_FINALIZE ioctl. Features requiring
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* this are documented in the "KVM_ARM_VCPU_FINALIZE" section of
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* KVM's API documentation.
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*
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* Returns: 0 if success else < 0 error code
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*/
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int kvm_arm_vcpu_finalize(CPUState *cs, int feature);
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/**
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* kvm_arm_register_device:
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* @mr: memory region for this device
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* @devid: the KVM device ID
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* @group: device control API group for setting addresses
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* @attr: device control API address type
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* @dev_fd: device control device file descriptor (or -1 if not supported)
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* @addr_ormask: value to be OR'ed with resolved address
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*
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* Remember the memory region @mr, and when it is mapped by the
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* machine model, tell the kernel that base address using the
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* KVM_ARM_SET_DEVICE_ADDRESS ioctl or the newer device control API. @devid
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* should be the ID of the device as defined by KVM_ARM_SET_DEVICE_ADDRESS or
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* the arm-vgic device in the device control API.
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* The machine model may map
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* and unmap the device multiple times; the kernel will only be told the final
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* address at the point where machine init is complete.
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*/
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void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid, uint64_t group,
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uint64_t attr, int dev_fd, uint64_t addr_ormask);
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/**
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* kvm_arm_init_cpreg_list:
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* @cpu: ARMCPU
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*
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* Initialize the ARMCPU cpreg list according to the kernel's
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* definition of what CPU registers it knows about (and throw away
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* the previous TCG-created cpreg list).
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*
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* Returns: 0 if success, else < 0 error code
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*/
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int kvm_arm_init_cpreg_list(ARMCPU *cpu);
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/**
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* kvm_arm_reg_syncs_via_cpreg_list:
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* @regidx: KVM register index
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*
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* Return true if this KVM register should be synchronized via the
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* cpreg list of arbitrary system registers, false if it is synchronized
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* by hand using code in kvm_arch_get/put_registers().
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*/
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bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx);
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/**
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* kvm_arm_cpreg_level:
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* @regidx: KVM register index
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*
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* Return the level of this coprocessor/system register. Return value is
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* either KVM_PUT_RUNTIME_STATE, KVM_PUT_RESET_STATE, or KVM_PUT_FULL_STATE.
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*/
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int kvm_arm_cpreg_level(uint64_t regidx);
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/**
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* write_list_to_kvmstate:
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* @cpu: ARMCPU
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* @level: the state level to sync
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*
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* For each register listed in the ARMCPU cpreg_indexes list, write
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* its value from the cpreg_values list into the kernel (via ioctl).
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* This updates KVM's working data structures from TCG data or
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* from incoming migration state.
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*
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* Returns: true if all register values were updated correctly,
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* false if some register was unknown to the kernel or could not
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* be written (eg constant register with the wrong value).
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* Note that we do not stop early on failure -- we will attempt
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* writing all registers in the list.
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*/
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bool write_list_to_kvmstate(ARMCPU *cpu, int level);
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/**
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* write_kvmstate_to_list:
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* @cpu: ARMCPU
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*
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* For each register listed in the ARMCPU cpreg_indexes list, write
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* its value from the kernel into the cpreg_values list. This is used to
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* copy info from KVM's working data structures into TCG or
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* for outbound migration.
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*
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* Returns: true if all register values were read correctly,
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* false if some register was unknown or could not be read.
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* Note that we do not stop early on failure -- we will attempt
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* reading all registers in the list.
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*/
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bool write_kvmstate_to_list(ARMCPU *cpu);
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/**
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* kvm_arm_cpu_pre_save:
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* @cpu: ARMCPU
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*
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* Called after write_kvmstate_to_list() from cpu_pre_save() to update
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* the cpreg list with KVM CPU state.
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*/
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void kvm_arm_cpu_pre_save(ARMCPU *cpu);
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/**
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* kvm_arm_cpu_post_load:
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* @cpu: ARMCPU
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*
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* Called from cpu_post_load() to update KVM CPU state from the cpreg list.
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*/
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void kvm_arm_cpu_post_load(ARMCPU *cpu);
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/**
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* kvm_arm_reset_vcpu:
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* @cpu: ARMCPU
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*
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* Called at reset time to kernel registers to their initial values.
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*/
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void kvm_arm_reset_vcpu(ARMCPU *cpu);
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/**
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* kvm_arm_init_serror_injection:
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* @cs: CPUState
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*
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* Check whether KVM can set guest SError syndrome.
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*/
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void kvm_arm_init_serror_injection(CPUState *cs);
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/**
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* kvm_get_vcpu_events:
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* @cpu: ARMCPU
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*
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* Get VCPU related state from kvm.
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*
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* Returns: 0 if success else < 0 error code
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*/
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int kvm_get_vcpu_events(ARMCPU *cpu);
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/**
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* kvm_put_vcpu_events:
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* @cpu: ARMCPU
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*
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* Put VCPU related state to kvm.
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*
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* Returns: 0 if success else < 0 error code
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*/
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int kvm_put_vcpu_events(ARMCPU *cpu);
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#ifdef CONFIG_KVM
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/**
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* kvm_arm_create_scratch_host_vcpu:
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* @cpus_to_try: array of QEMU_KVM_ARM_TARGET_* values (terminated with
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* QEMU_KVM_ARM_TARGET_NONE) to try as fallback if the kernel does not
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* know the PREFERRED_TARGET ioctl. Passing NULL is the same as passing
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* an empty array.
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* @fdarray: filled in with kvmfd, vmfd, cpufd file descriptors in that order
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* @init: filled in with the necessary values for creating a host
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* vcpu. If NULL is provided, will not init the vCPU (though the cpufd
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* will still be set up).
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*
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* Create a scratch vcpu in its own VM of the type preferred by the host
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* kernel (as would be used for '-cpu host'), for purposes of probing it
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* for capabilities.
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*
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* Returns: true on success (and fdarray and init are filled in),
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* false on failure (and fdarray and init are not valid).
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*/
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bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try,
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int *fdarray,
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struct kvm_vcpu_init *init);
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/**
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* kvm_arm_destroy_scratch_host_vcpu:
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* @fdarray: array of fds as set up by kvm_arm_create_scratch_host_vcpu
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*
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* Tear down the scratch vcpu created by kvm_arm_create_scratch_host_vcpu.
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*/
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void kvm_arm_destroy_scratch_host_vcpu(int *fdarray);
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#define TYPE_ARM_HOST_CPU "host-" TYPE_ARM_CPU
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/**
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* ARMHostCPUFeatures: information about the host CPU (identified
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* by asking the host kernel)
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*/
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typedef struct ARMHostCPUFeatures {
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ARMISARegisters isar;
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uint64_t features;
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uint32_t target;
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const char *dtb_compatible;
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} ARMHostCPUFeatures;
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/**
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* kvm_arm_get_host_cpu_features:
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* @ahcf: ARMHostCPUClass to fill in
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*
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* Probe the capabilities of the host kernel's preferred CPU and fill
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* in the ARMHostCPUClass struct accordingly.
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*
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* Returns true on success and false otherwise.
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*/
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bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf);
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/**
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* kvm_arm_sve_get_vls:
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* @cs: CPUState
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* @map: bitmap to fill in
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*
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* Get all the SVE vector lengths supported by the KVM host, setting
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* the bits corresponding to their length in quadwords minus one
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* (vq - 1) in @map up to ARM_MAX_VQ.
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*/
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void kvm_arm_sve_get_vls(CPUState *cs, unsigned long *map);
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/**
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* kvm_arm_set_cpu_features_from_host:
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* @cpu: ARMCPU to set the features for
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*
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* Set up the ARMCPU struct fields up to match the information probed
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* from the host CPU.
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*/
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void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu);
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/**
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* kvm_arm_add_vcpu_properties:
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* @obj: The CPU object to add the properties to
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*
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* Add all KVM specific CPU properties to the CPU object. These
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* are the CPU properties with "kvm-" prefixed names.
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*/
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void kvm_arm_add_vcpu_properties(Object *obj);
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/**
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* kvm_arm_aarch32_supported:
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*
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* Returns: true if KVM can enable AArch32 mode
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* and false otherwise.
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*/
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bool kvm_arm_aarch32_supported(void);
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/**
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* kvm_arm_pmu_supported:
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*
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* Returns: true if KVM can enable the PMU
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* and false otherwise.
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*/
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bool kvm_arm_pmu_supported(void);
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/**
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* kvm_arm_sve_supported:
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*
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* Returns true if KVM can enable SVE and false otherwise.
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*/
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bool kvm_arm_sve_supported(void);
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/**
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* kvm_arm_get_max_vm_ipa_size:
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* @ms: Machine state handle
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*
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* Returns the number of bits in the IPA address space supported by KVM
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*/
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int kvm_arm_get_max_vm_ipa_size(MachineState *ms);
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/**
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* kvm_arm_sync_mpstate_to_kvm:
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* @cpu: ARMCPU
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*
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* If supported set the KVM MP_STATE based on QEMU's model.
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*
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* Returns 0 on success and -1 on failure.
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*/
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int kvm_arm_sync_mpstate_to_kvm(ARMCPU *cpu);
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/**
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* kvm_arm_sync_mpstate_to_qemu:
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* @cpu: ARMCPU
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*
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* If supported get the MP_STATE from KVM and store in QEMU's model.
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*
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* Returns 0 on success and aborts on failure.
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*/
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int kvm_arm_sync_mpstate_to_qemu(ARMCPU *cpu);
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/**
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* kvm_arm_get_virtual_time:
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* @cs: CPUState
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*
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* Gets the VCPU's virtual counter and stores it in the KVM CPU state.
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*/
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void kvm_arm_get_virtual_time(CPUState *cs);
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/**
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* kvm_arm_put_virtual_time:
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* @cs: CPUState
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*
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* Sets the VCPU's virtual counter to the value stored in the KVM CPU state.
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*/
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void kvm_arm_put_virtual_time(CPUState *cs);
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void kvm_arm_vm_state_change(void *opaque, int running, RunState state);
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int kvm_arm_vgic_probe(void);
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void kvm_arm_pmu_set_irq(CPUState *cs, int irq);
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void kvm_arm_pmu_init(CPUState *cs);
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int kvm_arm_set_irq(int cpu, int irqtype, int irq, int level);
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#else
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static inline void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu)
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{
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/*
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* This should never actually be called in the "not KVM" case,
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* but set up the fields to indicate an error anyway.
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*/
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cpu->kvm_target = QEMU_KVM_ARM_TARGET_NONE;
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cpu->host_cpu_probe_failed = true;
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}
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static inline void kvm_arm_add_vcpu_properties(Object *obj) {}
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static inline bool kvm_arm_aarch32_supported(void)
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{
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return false;
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}
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static inline bool kvm_arm_pmu_supported(void)
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{
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return false;
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}
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static inline bool kvm_arm_sve_supported(void)
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{
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return false;
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}
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static inline int kvm_arm_get_max_vm_ipa_size(MachineState *ms)
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{
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return -ENOENT;
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}
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static inline int kvm_arm_vgic_probe(void)
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{
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return 0;
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}
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static inline void kvm_arm_pmu_set_irq(CPUState *cs, int irq) {}
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static inline void kvm_arm_pmu_init(CPUState *cs) {}
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static inline void kvm_arm_sve_get_vls(CPUState *cs, unsigned long *map) {}
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static inline void kvm_arm_get_virtual_time(CPUState *cs) {}
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static inline void kvm_arm_put_virtual_time(CPUState *cs) {}
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#endif
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static inline const char *gic_class_name(void)
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{
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return kvm_irqchip_in_kernel() ? "kvm-arm-gic" : "arm_gic";
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}
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/**
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* gicv3_class_name
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*
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* Return name of GICv3 class to use depending on whether KVM acceleration is
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* in use. May throw an error if the chosen implementation is not available.
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*
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* Returns: class name to use
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*/
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static inline const char *gicv3_class_name(void)
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{
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if (kvm_irqchip_in_kernel()) {
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#ifdef TARGET_AARCH64
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return "kvm-arm-gicv3";
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#else
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error_report("KVM GICv3 acceleration is not supported on this "
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"platform");
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exit(1);
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#endif
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} else {
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if (kvm_enabled()) {
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error_report("Userspace GICv3 is not supported with KVM");
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exit(1);
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}
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return "arm-gicv3";
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}
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}
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/**
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* kvm_arm_handle_debug:
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* @cs: CPUState
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* @debug_exit: debug part of the KVM exit structure
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*
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* Returns: TRUE if the debug exception was handled.
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*/
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bool kvm_arm_handle_debug(CPUState *cs, struct kvm_debug_exit_arch *debug_exit);
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/**
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* kvm_arm_hw_debug_active:
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* @cs: CPU State
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*
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* Return: TRUE if any hardware breakpoints in use.
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*/
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bool kvm_arm_hw_debug_active(CPUState *cs);
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/**
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* kvm_arm_copy_hw_debug_data:
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* @ptr: kvm_guest_debug_arch structure
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*
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* Copy the architecture specific debug registers into the
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* kvm_guest_debug ioctl structure.
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*/
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struct kvm_guest_debug_arch;
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void kvm_arm_copy_hw_debug_data(struct kvm_guest_debug_arch *ptr);
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/**
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* kvm_arm_verify_ext_dabt_pending:
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* @cs: CPUState
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*
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* Verify the fault status code wrt the Ext DABT injection
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*
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* Returns: true if the fault status code is as expected, false otherwise
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*/
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bool kvm_arm_verify_ext_dabt_pending(CPUState *cs);
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/**
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* its_class_name:
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*
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* Return the ITS class name to use depending on whether KVM acceleration
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* and KVM CAP_SIGNAL_MSI are supported
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*
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* Returns: class name to use or NULL
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*/
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static inline const char *its_class_name(void)
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{
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if (kvm_irqchip_in_kernel()) {
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/* KVM implementation requires this capability */
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return kvm_direct_msi_enabled() ? "arm-its-kvm" : NULL;
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} else {
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/* Software emulation is not implemented yet */
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return NULL;
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}
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}
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#endif
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