From: "Radim Krčmář" <rkrcmar@redhat.com>
To: Liran Alon <liran.alon@oracle.com>
Cc: pbonzini@redhat.com, kvm@vger.kernel.org, idan.brown@oracle.com,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH] KVM: x86: Add emulation of MSR_SMI_COUNT
Date: Tue, 5 Dec 2017 22:09:18 +0100 [thread overview]
Message-ID: <20171205210918.GC20099@flask> (raw)
In-Reply-To: <1510746194-12291-1-git-send-email-liran.alon@oracle.com>
2017-11-15 13:43+0200, Liran Alon:
> This MSR returns the number of #SMIs that occurred on CPU since
> boot.
>
> It was seen to be used frequently by ESXi guest.
>
> Patch adds a new vcpu-arch specific var called smi_count to
> save the number of #SMIs which occurred on CPU since boot.
> It is exposed as a read-only MSR to guest (causing #GP
> on wrmsr) in RDMSR/WRMSR emulation code.
> MSR_SMI_COUNT is also added to emulated_msrs[] to make sure
> user-space can save/restore it for migration purposes.
>
> Signed-off-by: Liran Alon <liran.alon@oracle.com>
> Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
> Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
> Reviewed-by: Bhavesh Davda <bhavesh.davda@oracle.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> ---
Queued, thanks.
prev parent reply other threads:[~2017-12-05 21:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 11:43 [PATCH] KVM: x86: Add emulation of MSR_SMI_COUNT Liran Alon
2017-11-15 13:47 ` Paolo Bonzini
2017-12-04 9:27 ` David Hildenbrand
2017-12-04 9:31 ` Paolo Bonzini
2017-12-04 9:32 ` David Hildenbrand
2017-12-05 21:09 ` Radim Krčmář [this message]
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