Re: [PATCH v6 25/27] KVM: arm64: Add a capability to advertise SVE support
From: Julien Thierry <hidden>
Date: 2019-03-27 15:16:37
Also in:
kvmarm
Hi Dave, On 19/03/2019 17:52, Dave Martin wrote:
To provide a uniform way to check for KVM SVE support amongst other features, this patch adds a suitable capability KVM_CAP_ARM_SVE, and reports it as present when SVE is available. Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Julien Thierry <redacted> Cheers, Julien
quoted hunk ↗ jump to hunk
--- Changes since v5: * [Julien Thierry] Strip out has_vhe() sanity-check, which wasn't in the most logical place, and anyway doesn't really belong in this patch. Moved to KVM: arm64/sve: Allow userspace to enable SVE for vcpus instead. --- arch/arm64/kvm/reset.c | 3 +++ include/uapi/linux/kvm.h | 1 + 2 files changed, 4 insertions(+)diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 4f04dbf..180d7a5 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c@@ -98,6 +98,9 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_VM_IPA_SIZE: r = kvm_ipa_limit; break; + case KVM_CAP_ARM_SVE: + r = system_supports_sve(); + break; default: r = 0; }diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index c3b8e7a..1d56444 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h@@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_ARM_VM_IPA_SIZE 165 #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166 #define KVM_CAP_HYPERV_CPUID 167 +#define KVM_CAP_ARM_SVE 168 #ifdef KVM_CAP_IRQ_ROUTING
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