@@ -641,5 +641,9 @@ static inline bool guest_hyp_fpsimd_traps_enabled(const struct kvm_vcpu *vcpu)
return __guest_hyp_cptr_xen_trap_enabled(vcpu, FPEN);
}
+static inline bool guest_hyp_sve_traps_enabled(const struct kvm_vcpu *vcpu)
+{
+ return __guest_hyp_cptr_xen_trap_enabled(vcpu, ZEN);
+}
#endif /* __ARM64_KVM_EMULATE_H__ */
@@ -217,6 +217,9 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu)
*/
static int handle_sve(struct kvm_vcpu *vcpu)
{
+ if (guest_hyp_sve_traps_enabled(vcpu))
+ return kvm_inject_nested_sync(vcpu, kvm_vcpu_get_esr(vcpu));
+
kvm_inject_undefined(vcpu);
return 1;
}
@@ -348,6 +348,8 @@ static bool kvm_hyp_handle_fpsimd(struct kvm_vcpu *vcpu, u64 *exit_code)
case ESR_ELx_EC_SVE:
if (!sve_guest)
return false;
+ if (guest_hyp_sve_traps_enabled(vcpu))
+ return false;
break;
default:
return false;
Similar to FPSIMD traps, don't load SVE state if the guest hypervisor has SVE traps enabled and forward the trap instead. Note that ZCR_EL2 will require some special handling, as it takes a sysreg trap to EL2 when HCR_EL2.NV = 1. Signed-off-by: Oliver Upton <oliver.upton@linux.dev> --- arch/arm64/include/asm/kvm_emulate.h | 4 ++++ arch/arm64/kvm/handle_exit.c | 3 +++ arch/arm64/kvm/hyp/include/hyp/switch.h | 2 ++ 3 files changed, 9 insertions(+)