From: "Radim Krčmář" <rkrcmar@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
stable <stable@vger.kernel.org>
Subject: Re: [PATCH] KVM: x86: do not save guest-unsupported XSAVE state
Date: Sat, 4 Feb 2017 17:26:17 +0100 [thread overview]
Message-ID: <20170204162616.GB5582@potion> (raw)
In-Reply-To: <42ae50e8-444c-5b0b-e13b-266e3bf80ca3@redhat.com>
2017-02-01 16:13-0800, Paolo Bonzini:
> On 01/02/2017 05:19, Radim Krčmář wrote:
>> Saving unsupported state prevents migration when the new host does not
>> support a XSAVE feature of the original host, even if the feature is not
>> exposed to the guest.
>>
>> We've masked host features with guest-visible features before, with
>> 4344ee981e21 ("KVM: x86: only copy XSAVE state for the supported
>> features") and dropped it when implementing XSAVES. Do it again.
>>
>> Fixes: df1daba7d1cb ("KVM: x86: support XSAVES usage in the host")
>> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
>
> Cc: stable@vger.kernel.org
> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
>
> Please apply to kvm/master and send it yourself to Linus since I don't
> have access to my machine this week.
Done, thanks.
prev parent reply other threads:[~2017-02-04 16:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170201131953.30098-1-rkrcmar@redhat.com>
2017-02-02 0:13 ` [PATCH] KVM: x86: do not save guest-unsupported XSAVE state Paolo Bonzini
2017-02-04 16:26 ` Radim Krčmář [this message]
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