| Message ID | 20250213161426.102987-30-steven.price@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | arm64: Support for Arm CCA in KVM | expand |
On 2/14/25 2:14 AM, Steven Price wrote: > From: Suzuki K Poulose <suzuki.poulose@arm.com> > > 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 <suzuki.poulose@arm.com> > Signed-off-by: Steven Price <steven.price@arm.com> > --- > arch/arm64/include/asm/kvm_rme.h | 2 ++ > arch/arm64/kvm/arm.c | 5 ++++- > arch/arm64/kvm/rme.c | 5 +++++ > 3 files changed, 11 insertions(+), 1 deletion(-) > Reviewed-by: Gavin Shan <gshan@redhat.com>
diff --git a/arch/arm64/include/asm/kvm_rme.h b/arch/arm64/include/asm/kvm_rme.h index 069a410a756f..d684b30493f5 100644 --- a/arch/arm64/include/asm/kvm_rme.h +++ b/arch/arm64/include/asm/kvm_rme.h @@ -85,6 +85,8 @@ void kvm_init_rme(void); u32 kvm_realm_ipa_limit(void); u32 kvm_realm_vgic_nr_lr(void); +bool kvm_rme_supports_sve(void); + int kvm_realm_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap); int kvm_init_realm_vm(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 79d541c95bfb..25239bf58715 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -427,7 +427,10 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) r = get_kvm_ipa_limit(); break; case KVM_CAP_ARM_SVE: - r = system_supports_sve(); + if (kvm_is_realm(kvm)) + r = kvm_rme_supports_sve(); + else + r = system_supports_sve(); break; case KVM_CAP_ARM_PTRAUTH_ADDRESS: case KVM_CAP_ARM_PTRAUTH_GENERIC: diff --git a/arch/arm64/kvm/rme.c b/arch/arm64/kvm/rme.c index 3a7d515c9e9f..e31d86e314dd 100644 --- a/arch/arm64/kvm/rme.c +++ b/arch/arm64/kvm/rme.c @@ -38,6 +38,11 @@ static bool rme_has_feature(unsigned long feature) return !!u64_get_bits(rmm_feat_reg0, feature); } +bool kvm_rme_supports_sve(void) +{ + return rme_has_feature(RMI_FEATURE_REGISTER_0_SVE_EN); +} + static int rmi_check_version(void) { struct arm_smccc_res res;