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From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Roman Kagan" <rkagan@virtuozzo.com>,
	"Liran Alon" <liran.alon@oracle.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/2] x86/kvm/hyper-v: don't recommend doing reset via synthetic MSR
Date: Fri, 25 Jan 2019 12:19:33 +0100	[thread overview]
Message-ID: <20190125111934.28782-2-vkuznets@redhat.com> (raw)
In-Reply-To: <20190125111934.28782-1-vkuznets@redhat.com>

System reset through synthetic MSR is not recommended neither by genuine
Hyper-V nor my QEMU.

Fixes: 2bc39970e932 ("x86/kvm/hyper-v: Introduce KVM_GET_SUPPORTED_HV_CPUID")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
---
 arch/x86/kvm/hyperv.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index ac44a681f065..4840f5b3c88f 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1847,7 +1847,6 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 		case HYPERV_CPUID_ENLIGHTMENT_INFO:
 			ent->eax |= HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
 			ent->eax |= HV_X64_APIC_ACCESS_RECOMMENDED;
-			ent->eax |= HV_X64_SYSTEM_RESET_RECOMMENDED;
 			ent->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED;
 			ent->eax |= HV_X64_CLUSTER_IPI_RECOMMENDED;
 			ent->eax |= HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED;
-- 
2.20.1

  reply	other threads:[~2019-01-25 11:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-25 11:19 [PATCH v2 0/2] tweak HYPERV_CPUID_ENLIGHTMENT_INFO Vitaly Kuznetsov
2019-01-25 11:19 ` Vitaly Kuznetsov [this message]
2019-01-25 11:19 ` [PATCH v2 2/2] x86/kvm/hyper-v: recommend using eVMCS only when it is enabled Vitaly Kuznetsov
2019-01-25 11:43   ` Vitaly Kuznetsov
2019-01-25 18:11     ` Paolo Bonzini
2019-01-25 17:51 ` [PATCH v2 0/2] tweak HYPERV_CPUID_ENLIGHTMENT_INFO Paolo Bonzini

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