/*
* 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"
#include "qemu/error-report.h"
#define KVM_ARM_VGIC_V2 (1 << 0)
#define KVM_ARM_VGIC_V3 (1 << 1)
/**
* kvm_arm_vcpu_init:
* @cs: CPUState
*
* Initialize (or reinitialize) the VCPU by invoking the
* KVM_ARM_VCPU_INIT ioctl with the CPU type and feature
* bitmask specified in the CPUState.
*
* Returns: 0 if success else < 0 error code
*/
int kvm_arm_vcpu_init(CPUState *cs);
/**
* kvm_arm_vcpu_finalize:
* @cs: CPUState
* @feature: feature to finalize
*
* Finalizes the configuration of the specified VCPU feature by
* invoking the KVM_ARM_VCPU_FINALIZE ioctl. Features requiring
* this are documented in the "KVM_ARM_VCPU_FINALIZE" section of
* KVM's API documentation.
*
* Returns: 0 if success else < 0 error code
*/
int kvm_arm_vcpu_finalize(CPUState *cs, int feature);
/**
* 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)
* @addr_ormask: value to be OR'ed with resolved address
*
* 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, uint64_t addr_ormask);
/**
* kvm_arm_init_cpreg_list:
* @cpu: ARMCPU
*
* Initialize the ARMCPU cpreg list according to the kernel's
* definition of what CPU registers it knows about (and throw away
* the previous TCG-created cpreg list).
*
* Returns: 0 if success, else < 0 error code
*/
int kvm_arm_init_cpreg_list(ARMCPU *cpu);
/**
* kvm_arm_reg_syncs_via_cpreg_list:
* @regidx: KVM register index
*
* Return true if this KVM register should be synchronized via the
* cpreg list of arbitrary system registers, false if it is synchronized
* by hand using code in kvm_arch_get/put_registers().
*/
bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx);
/**
* kvm_arm_cpreg_level:
* @regidx: KVM register index
*
* Return the level of this coprocessor/system register. Return value is
* either KVM_PUT_RUNTIME_STATE, KVM_PUT_RESET_STATE, or KVM_PUT_FULL_STATE.
*/
int kvm_arm_cpreg_level(uint64_t regidx);
/**
* write_list_to_kvmstate:
* @cpu: ARMCPU
* @level: the state level to sync
*
* 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, int level);
/**
* 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);
/**
* kvm_arm_cpu_pre_save:
* @cpu: ARMCPU
*
* Called after write_kvmstate_to_list() from cpu_pre_save() to update
* the cpreg list with KVM CPU state.
*/
void kvm_arm_cpu_pre_save(ARMCPU *cpu);
/**
* kvm_arm_cpu_post_load:
* @cpu: ARMCPU
*
* Called from cpu_post_load() to update KVM CPU state from the cpreg list.
*/
void kvm_arm_cpu_post_load(ARMCPU *cpu);
/**
* kvm_arm_reset_vcpu:
* @cpu: ARMCPU
*
* Called at reset time to kernel registers to their initial values.
*/
void kvm_arm_reset_vcpu(ARMCPU *cpu);
/**
* kvm_arm_init_serror_injection:
* @cs: CPUState
*
* Check whether KVM can set guest SError syndrome.
*/
void kvm_arm_init_serror_injection(CPUState *cs);
/**
* kvm_get_vcpu_events:
* @cpu: ARMCPU
*
* Get VCPU related state from kvm.
*
* Returns: 0 if success else < 0 error code
*/
int kvm_get_vcpu_events(ARMCPU *cpu);
/**
* kvm_put_vcpu_events:
* @cpu: ARMCPU
*
* Put VCPU related state to kvm.
*
* Returns: 0 if success else < 0 error code
*/
int kvm_put_vcpu_events(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. Passing NULL is the same as passing
* an empty array.
* @fdarray: filled in with kvmfd, vmfd, cpufd file descriptors in that order
* @init: filled in with the necessary values for creating a host
* vcpu. If NULL is provided, will not init the vCPU (though the cpufd
* will still be set up).
*
* 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
/**
* ARMHostCPUFeatures: information about the host CPU (identified
* by asking the host kernel)
*/
typedef struct ARMHostCPUFeatures {
ARMISARegisters isar;
uint64_t features;
uint32_t target;
const char *dtb_compatible;
} ARMHostCPUFeatures;
/**
* kvm_arm_get_host_cpu_features:
* @ahcf: ARMHostCPUClass to fill in
*
* Probe the capabilities of the host kernel's preferred CPU and fill
* in the ARMHostCPUClass struct accordingly.
*
* Returns true on success and false otherwise.
*/
bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf);
/**
* kvm_arm_sve_get_vls:
* @cs: CPUState
* @map: bitmap to fill in
*
* Get all the SVE vector lengths supported by the KVM host, setting
* the bits corresponding to their length in quadwords minus one
* (vq - 1) in @map up to ARM_MAX_VQ.
*/
void kvm_arm_sve_get_vls(CPUState *cs, unsigned long *map);
/**
* kvm_arm_set_cpu_features_from_host:
* @cpu: ARMCPU to set the features for
*
* Set up the ARMCPU struct fields up to match the information probed
* from the host CPU.
*/
void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu);
/**
* kvm_arm_add_vcpu_properties:
* @obj: The CPU object to add the properties to
*
* Add all KVM specific CPU properties to the CPU object. These
* are the CPU properties with "kvm-" prefixed names.
*/
void kvm_arm_add_vcpu_properties(Object *obj);
/**
* kvm_arm_aarch32_supported:
*
* Returns: true if KVM can enable AArch32 mode
* and false otherwise.
*/
bool kvm_arm_aarch32_supported(void);
/**
* kvm_arm_pmu_supported:
*
* Returns: true if KVM can enable the PMU
* and false otherwise.
*/
bool kvm_arm_pmu_supported(void);
/**
* kvm_arm_sve_supported:
*
* Returns true if KVM can enable SVE and false otherwise.
*/
bool kvm_arm_sve_supported(void);
/**
* kvm_arm_get_max_vm_ipa_size:
* @ms: Machine state handle
*
* Returns the number of bits in the IPA address space supported by KVM
*/
int kvm_arm_get_max_vm_ipa_size(MachineState *ms);
/**
* kvm_arm_sync_mpstate_to_kvm:
* @cpu: ARMCPU
*
* If supported set the KVM MP_STATE based on QEMU's model.
*
* Returns 0 on success and -1 on failure.
*/
int kvm_arm_sync_mpstate_to_kvm(ARMCPU *cpu);
/**
* kvm_arm_sync_mpstate_to_qemu:
* @cpu: ARMCPU
*
* If supported get the MP_STATE from KVM and store in QEMU's model.
*
* Returns 0 on success and aborts on failure.
*/
int kvm_arm_sync_mpstate_to_qemu(ARMCPU *cpu);
/**
* kvm_arm_get_virtual_time:
* @cs: CPUState
*
* Gets the VCPU's virtual counter and stores it in the KVM CPU state.
*/
void kvm_arm_get_virtual_time(CPUState *cs);
/**
* kvm_arm_put_virtual_time:
* @cs: CPUState
*
* Sets the VCPU's virtual counter to the value stored in the KVM CPU state.
*/
void kvm_arm_put_virtual_time(CPUState *cs);
void kvm_arm_vm_state_change(void *opaque, int running, RunState state);
int kvm_arm_vgic_probe(void);
void kvm_arm_pmu_set_irq(CPUState *cs, int irq);
void kvm_arm_pmu_init(CPUState *cs);
int kvm_arm_set_irq(int cpu, int irqtype, int irq, int level);
#else
/*
* It's safe to call these functions without KVM support.
* They should either do nothing or return "not supported".
*/
static inline bool kvm_arm_aarch32_supported(void)
{
return false;
}
static inline bool kvm_arm_pmu_supported(void)
{
return false;
}
static inline bool kvm_arm_sve_supported(void)
{
return false;
}
/*
* These functions should never actually be called without KVM support.
*/
static inline void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu)
{
g_assert_not_reached();
}
static inline void kvm_arm_add_vcpu_properties(Object *obj)
{
g_assert_not_reached();
}
static inline int kvm_arm_get_max_vm_ipa_size(MachineState *ms)
{
g_assert_not_reached();
}
static inline int kvm_arm_vgic_probe(void)
{
g_assert_not_reached();
}
static inline void kvm_arm_pmu_set_irq(CPUState *cs, int irq)
{
g_assert_not_reached();
}
static inline void kvm_arm_pmu_init(CPUState *cs)
{
g_assert_not_reached();
}
static inline void kvm_arm_sve_get_vls(CPUState *cs, unsigned long *map)
{
g_assert_not_reached();
}
#endif
static inline const char *gic_class_name(void)
{
return kvm_irqchip_in_kernel() ? "kvm-arm-gic" : "arm_gic";
}
/**
* gicv3_class_name
*
* Return name of GICv3 class to use depending on whether KVM acceleration is
* in use. May throw an error if the chosen implementation is not available.
*
* Returns: class name to use
*/
static inline const char *gicv3_class_name(void)
{
if (kvm_irqchip_in_kernel()) {
return "kvm-arm-gicv3";
} else {
if (kvm_enabled()) {
error_report("Userspace GICv3 is not supported with KVM");
exit(1);
}
return "arm-gicv3";
}
}
/**
* kvm_arm_handle_debug:
* @cs: CPUState
* @debug_exit: debug part of the KVM exit structure
*
* Returns: TRUE if the debug exception was handled.
*/
bool kvm_arm_handle_debug(CPUState *cs, struct kvm_debug_exit_arch *debug_exit);
/**
* kvm_arm_hw_debug_active:
* @cs: CPU State
*
* Return: TRUE if any hardware breakpoints in use.
*/
bool kvm_arm_hw_debug_active(CPUState *cs);
/**
* kvm_arm_copy_hw_debug_data:
* @ptr: kvm_guest_debug_arch structure
*
* Copy the architecture specific debug registers into the
* kvm_guest_debug ioctl structure.
*/
struct kvm_guest_debug_arch;
void kvm_arm_copy_hw_debug_data(struct kvm_guest_debug_arch *ptr);
/**
* kvm_arm_verify_ext_dabt_pending:
* @cs: CPUState
*
* Verify the fault status code wrt the Ext DABT injection
*
* Returns: true if the fault status code is as expected, false otherwise
*/
bool kvm_arm_verify_ext_dabt_pending(CPUState *cs);
/**
* its_class_name:
*
* Return the ITS class name to use depending on whether KVM acceleration
* and KVM CAP_SIGNAL_MSI are supported
*
* Returns: class name to use or NULL
*/
static inline const char *its_class_name(void)
{
if (kvm_irqchip_in_kernel()) {
/* KVM implementation requires this capability */
return kvm_direct_msi_enabled() ? "arm-its-kvm" : NULL;
} else {
/* Software emulation is not implemented yet */
return NULL;
}
}
#endif
