/* Exception Information */
struct kvm_vcpu_fault_info fault;
+ /* Ownership of the FP regs */
+ enum {
+ FP_STATE_FREE,
+ FP_STATE_HOST_OWNED,
+ FP_STATE_GUEST_OWNED,
+ } fp_state;
+
/* Miscellaneous vcpu state flags */
u64 flags;
/* vcpu_arch flags field values: */
#define KVM_ARM64_DEBUG_DIRTY (1 << 0)
-#define KVM_ARM64_FP_ENABLED (1 << 1) /* guest FP regs loaded */
-#define KVM_ARM64_FP_HOST (1 << 2) /* host FP regs loaded */
#define KVM_ARM64_HOST_SVE_ENABLED (1 << 4) /* SVE enabled for EL0 */
#define KVM_ARM64_GUEST_HAS_SVE (1 << 5) /* SVE exposed to guest */
#define KVM_ARM64_VCPU_SVE_FINALIZED (1 << 6) /* SVE config completed */
BUG_ON(!current->mm);
BUG_ON(test_thread_flag(TIF_SVE));
- vcpu->arch.flags &= ~KVM_ARM64_FP_ENABLED;
- vcpu->arch.flags |= KVM_ARM64_FP_HOST;
+ vcpu->arch.fp_state = FP_STATE_HOST_OWNED;
vcpu->arch.flags &= ~KVM_ARM64_HOST_SVE_ENABLED;
if (read_sysreg(cpacr_el1) & CPACR_EL1_ZEN_EL0EN)
if (read_sysreg(cpacr_el1) & CPACR_EL1_SMEN_EL0EN)
vcpu->arch.flags |= KVM_ARM64_HOST_SME_ENABLED;
- if (read_sysreg_s(SYS_SVCR) &
- (SVCR_SM_MASK | SVCR_ZA_MASK)) {
- vcpu->arch.flags &= ~KVM_ARM64_FP_HOST;
+ if (read_sysreg_s(SYS_SVCR) & (SVCR_SM_MASK | SVCR_ZA_MASK)) {
+ vcpu->arch.fp_state = FP_STATE_FREE;
fpsimd_save_and_flush_cpu_state();
}
}
void kvm_arch_vcpu_ctxflush_fp(struct kvm_vcpu *vcpu)
{
if (!system_supports_fpsimd() || test_thread_flag(TIF_FOREIGN_FPSTATE))
- vcpu->arch.flags &= ~(KVM_ARM64_FP_ENABLED | KVM_ARM64_FP_HOST);
+ vcpu->arch.fp_state = FP_STATE_FREE;
}
/*
{
WARN_ON_ONCE(!irqs_disabled());
- if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED) {
+ if (vcpu->arch.fp_state == FP_STATE_GUEST_OWNED) {
/*
* Currently we do not support SME guests so SVCR is
* always 0 and we just need a variable to point to.
CPACR_EL1_SMEN_EL1EN);
}
- if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED) {
+ if (vcpu->arch.fp_state == FP_STATE_GUEST_OWNED) {
if (vcpu_has_sve(vcpu)) {
__vcpu_sys_reg(vcpu, ZCR_EL1) = read_sysreg_el1(SYS_ZCR);
/* Check whether the FP regs are owned by the guest */
static inline bool guest_owns_fp_regs(struct kvm_vcpu *vcpu)
{
- return !!(vcpu->arch.flags & KVM_ARM64_FP_ENABLED);
+ return vcpu->arch.fp_state == FP_STATE_GUEST_OWNED;
}
/* Save the 32-bit only FPSIMD system register state */
isb();
/* Write out the host state if it's in the registers */
- if (vcpu->arch.flags & KVM_ARM64_FP_HOST) {
+ if (vcpu->arch.fp_state == FP_STATE_HOST_OWNED)
__fpsimd_save_state(vcpu->arch.host_fpsimd_state);
- vcpu->arch.flags &= ~KVM_ARM64_FP_HOST;
- }
/* Restore the guest state */
if (sve_guest)
if (!(read_sysreg(hcr_el2) & HCR_RW))
write_sysreg(__vcpu_sys_reg(vcpu, FPEXC32_EL2), fpexc32_el2);
- vcpu->arch.flags |= KVM_ARM64_FP_ENABLED;
+ vcpu->arch.fp_state = FP_STATE_GUEST_OWNED;
return true;
}
}
cptr = CPTR_EL2_DEFAULT;
- if (vcpu_has_sve(vcpu) && (vcpu->arch.flags & KVM_ARM64_FP_ENABLED))
+ if (vcpu_has_sve(vcpu) && (vcpu->arch.fp_state == FP_STATE_GUEST_OWNED))
cptr |= CPTR_EL2_TZ;
if (cpus_have_final_cap(ARM64_SME))
cptr &= ~CPTR_EL2_TSM;
__sysreg_restore_state_nvhe(host_ctxt);
- if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED)
+ if (vcpu->arch.fp_state == FP_STATE_GUEST_OWNED)
__fpsimd_save_fpexc32(vcpu);
__debug_switch_to_host(vcpu);
sysreg_restore_host_state_vhe(host_ctxt);
- if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED)
+ if (vcpu->arch.fp_state == FP_STATE_GUEST_OWNED)
__fpsimd_save_fpexc32(vcpu);
__debug_switch_to_host(vcpu);