Commit d8f5537a authored by Siddharth Chandrasekaran's avatar Siddharth Chandrasekaran Committed by Paolo Bonzini
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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 <graf@amazon.com>
Cc: Evgeny Iakovlev <eyakovl@amazon.de>
Signed-off-by: default avatarSiddharth Chandrasekaran <sidcha@amazon.de>
Message-Id: <e63fc1c61dd2efecbefef239f4f0a598bd552750.1622019134.git.sidcha@amazon.de>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 5974565b

arch/x86/include/asm/hyperv-tlfs.h

+6 −1
Original line number Diff line number Diff line
@@ -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)

arch/x86/kvm/hyperv.c

+1 −0
Original line number Diff line number Diff line
@@ -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;