From: Siddharth Chandrasekaran Date: Wed, 26 May 2021 09:03:56 +0000 (+0200) Subject: KVM: hyper-v: Advertise support for fast XMM hypercalls X-Git-Tag: microblaze-v5.15~167^2~225 X-Git-Url: http://git.monstr.eu/?p=linux-2.6-microblaze.git;a=commitdiff_plain;h=d8f5537a8816c8f00ea3103e74b65987963a56c6 KVM: hyper-v: Advertise support for fast XMM hypercalls Now that kvm_hv_flush_tlb() has been patched to support XMM hypercall inputs, we can start advertising this feature to guests. Cc: Alexander Graf Cc: Evgeny Iakovlev Signed-off-by: Siddharth Chandrasekaran Message-Id: Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index 27a9f08e8386..9fe4cc9c0f7d 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -52,7 +52,7 @@ * Support for passing hypercall input parameter block via XMM * registers is available */ -#define HV_X64_HYPERCALL_PARAMS_XMM_AVAILABLE BIT(4) +#define HV_X64_HYPERCALL_XMM_INPUT_AVAILABLE BIT(4) /* Support for a virtual guest idle state is available */ #define HV_X64_GUEST_IDLE_STATE_AVAILABLE BIT(5) /* Frequency MSRs available */ @@ -61,6 +61,11 @@ #define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE BIT(10) /* Support for debug MSRs available */ #define HV_FEATURE_DEBUG_MSRS_AVAILABLE BIT(11) +/* + * Support for returning hypercall output block via XMM + * registers is available + */ +#define HV_X64_HYPERCALL_XMM_OUTPUT_AVAILABLE BIT(15) /* stimer Direct Mode is available */ #define HV_STIMER_DIRECT_MODE_AVAILABLE BIT(19) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 449589e283d6..dbd3152b1379 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2243,6 +2243,7 @@ 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_XMM_INPUT_AVAILABLE; ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE; ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;