From: Suzuki K Poulose Given we have different types of VMs supported, check the support for SVE for the given instance of the VM to accurately report the status. Signed-off-by: Suzuki K Poulose Signed-off-by: Steven Price Reviewed-by: Gavin Shan Reviewed-by: Joey Gouly --- Changes since v10: * RME->RMI renaming. * Adapt to move CAP check to kvm_realm_ext_allowed(). --- arch/arm64/include/asm/kvm_rmi.h | 2 ++ arch/arm64/kvm/arm.c | 2 ++ arch/arm64/kvm/rmi.c | 5 +++++ 3 files changed, 9 insertions(+) diff --git a/arch/arm64/include/asm/kvm_rmi.h b/arch/arm64/include/asm/kvm_rmi.h index eacf82a7467d..d641748b5306 100644 --- a/arch/arm64/include/asm/kvm_rmi.h +++ b/arch/arm64/include/asm/kvm_rmi.h @@ -79,6 +79,8 @@ struct realm_rec { void kvm_init_rmi(void); u32 kvm_realm_ipa_limit(void); +bool kvm_rmi_supports_sve(void); + int kvm_init_realm(struct kvm *kvm); int kvm_activate_realm(struct kvm *kvm); void kvm_destroy_realm(struct kvm *kvm); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 495082e601a9..aacbeb524b6a 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -148,6 +148,8 @@ static bool kvm_realm_ext_allowed(long ext) case KVM_CAP_ARM_PTRAUTH_GENERIC: case KVM_CAP_ARM_RMI: return true; + case KVM_CAP_ARM_SVE: + return kvm_rmi_supports_sve(); } return false; } diff --git a/arch/arm64/kvm/rmi.c b/arch/arm64/kvm/rmi.c index 2b03e962ee41..678d775aa1c7 100644 --- a/arch/arm64/kvm/rmi.c +++ b/arch/arm64/kvm/rmi.c @@ -25,6 +25,11 @@ static bool rmi_has_feature(unsigned long feature) return !!u64_get_bits(rmm_feat_reg0, feature); } +bool kvm_rmi_supports_sve(void) +{ + return rmi_has_feature(RMI_FEATURE_REGISTER_0_SVE); +} + u32 kvm_realm_ipa_limit(void) { return u64_get_bits(rmm_feat_reg0, RMI_FEATURE_REGISTER_0_S2SZ); -- 2.43.0