Now that all extant hypercalls that can use XMM registers (based on spec) for input/outputs are patched to support them, we can start advertising this feature to guests. Cc: Alexander Graf <graf@xxxxxxxxxx> Cc: Evgeny Iakovlev <eyakovl@xxxxxxxxx> Signed-off-by: Siddharth Chandrasekaran <sidcha@xxxxxxxxx> --- arch/x86/include/asm/hyperv-tlfs.h | 4 ++-- arch/x86/kvm/hyperv.c | 1 + 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index e6cd3fee562b..1f160ef60509 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -49,10 +49,10 @@ /* Support for physical CPU dynamic partitioning events is available*/ #define HV_X64_CPU_DYNAMIC_PARTITIONING_AVAILABLE BIT(3) /* - * Support for passing hypercall input parameter block via XMM + * Support for passing hypercall input and output parameter block via XMM * registers is available */ -#define HV_X64_HYPERCALL_PARAMS_XMM_AVAILABLE BIT(4) +#define HV_X64_HYPERCALL_PARAMS_XMM_AVAILABLE BIT(4) | BIT(15) /* Support for a virtual guest idle state is available */ #define HV_X64_GUEST_IDLE_STATE_AVAILABLE BIT(5) /* Frequency MSRs available */ diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index bf2f86f263f1..dd462c1d641d 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2254,6 +2254,7 @@ int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, ent->ebx |= HV_POST_MESSAGES; ent->ebx |= HV_SIGNAL_EVENTS; + ent->edx |= HV_X64_HYPERCALL_PARAMS_XMM_AVAILABLE; ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE; ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE; -- 2.17.1 Amazon Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B Sitz: Berlin Ust-ID: DE 289 237 879
