linux-kernel - [FYI PATCH 14/20] kvm/x86: Hyper-V HV_X64_MSR_VP

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Message-Id: <1443436745-38086-15-git-send-email-pbonzini@redhat.com>
Date:	Mon, 28 Sep 2015 12:38:59 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:	bsd@...hat.com, Andrey Smetanin <asmetanin@...tuozzo.com>,
	"Denis V. Lunev" <den@...nvz.org>, Gleb Natapov <gleb@...nel.org>
Subject: [FYI PATCH 14/20] kvm/x86: Hyper-V HV_X64_MSR_VP_INDEX export for QEMU.

From: Andrey Smetanin <asmetanin@...tuozzo.com>

Insert Hyper-V HV_X64_MSR_VP_INDEX into msr's emulated list,
so QEMU can set Hyper-V features cpuid HV_X64_MSR_VP_INDEX_AVAILABLE
bit correctly. KVM emulation part is in place already.

Necessary to support loading of winhv.sys in guest, which in turn is
required to support Windows VMBus.

Signed-off-by: Andrey Smetanin <asmetanin@...tuozzo.com>
Reviewed-by: Roman Kagan <rkagan@...tuozzo.com>
Signed-off-by: Denis V. Lunev <den@...nvz.org>
CC: Paolo Bonzini <pbonzini@...hat.com>
CC: Gleb Natapov <gleb@...nel.org>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/x86.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7e207de0a13f..5bc598de28a7 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -953,6 +953,7 @@ static u32 emulated_msrs[] = {
 	HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2,
 	HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL,
 	HV_X64_MSR_RESET,
+	HV_X64_MSR_VP_INDEX,
 	HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
 	MSR_KVM_PV_EOI_EN,
 
-- 
1.8.3.1


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