From: Siddharth Chandrasekaran <sidcha@amazon.de>
To: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <wei.liu@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
<x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Paolo Bonzini <pbonzini@redhat.com>,
"Sean Christopherson" <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
"Joerg Roedel" <joro@8bytes.org>
Cc: Siddharth Chandrasekaran <sidcha@amazon.de>,
Alexander Graf <graf@amazon.com>,
Evgeny Iakovlev <eyakovl@amazon.de>,
Liran Alon <liran@amazon.com>,
Ioannis Aslanidis <iaslan@amazon.de>,
<linux-hyperv@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<kvm@vger.kernel.org>
Subject: [PATCH v3 4/4] KVM: hyper-v: Advertise support for fast XMM hypercalls
Date: Tue, 13 Apr 2021 23:50:57 +0200 [thread overview]
Message-ID: <33a7e27046c15134667ea891feacbe3fe208f66e.1618349671.git.sidcha@amazon.de> (raw)
In-Reply-To: <cover.1618349671.git.sidcha@amazon.de>
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>
---
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;
--
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
next prev parent reply other threads:[~2021-04-13 21:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 21:50 [PATCH v3 0/4] Add support for XMM fast hypercalls Siddharth Chandrasekaran
2021-04-13 21:50 ` [PATCH v3 1/4] KVM: x86: Move FPU register accessors into fpu.h Siddharth Chandrasekaran
2021-04-13 21:50 ` [PATCH v3 2/4] KVM: hyper-v: Collect hypercall params into struct Siddharth Chandrasekaran
2021-04-13 21:50 ` [PATCH v3 3/4] KVM: x86: kvm_hv_flush_tlb use inputs from XMM registers Siddharth Chandrasekaran
2021-04-13 21:50 ` Siddharth Chandrasekaran [this message]
2021-05-24 12:00 ` [PATCH v3 4/4] KVM: hyper-v: Advertise support for fast XMM hypercalls Paolo Bonzini
2021-05-25 9:00 ` Siddharth Chandrasekaran
2021-05-25 11:20 ` Paolo Bonzini
2021-05-26 9:09 ` Siddharth Chandrasekaran
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