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 <redacted>
Signed-off-by: Siddharth Chandrasekaran <redacted>
---
  arch/x86/include/asm/hyperv-tlfs.h | 7 ++++++-
  arch/x86/kvm/hyperv.c              | 1 +
  2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index ee6336a54f92..597ae1142864 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 cd6c6f1f06a4..0f6fd7550510 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c

@@ -2235,6 +2235,7 @@ 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;