| Message ID | 1553017938-710-26-git-send-email-Dave.Martin@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: arm64: SVE guest support | expand |
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 <julien.thierry@arm.com> Cheers, Julien > --- > > 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 > >
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
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> --- 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(+)