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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: Siddharth Chandrasekaran <sidcha@amazon.de>
Message-Id: <e63fc1c61dd2efecbefef239f4f0a598bd552750.1622019134.git.sidcha@amazon.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Siddharth Chandrasekaran 2021-05-26 11:03:56 +02:00 committed by Paolo Bonzini
parent 5974565bc2
commit d8f5537a88
2 changed files with 7 additions and 1 deletions
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7
arch/x86/include/asm/hyperv-tlfs.h
View File

@ -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)

1
arch/x86/kvm/hyperv.c
View File

@ -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;