From: Haozhong Zhang <haozhong.zhang@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
Laszlo Ersek <lersek@redhat.com>,
rkrcmar@redhat.com, qemu-devel@nongnu.org,
Richard Henderson <rth@twiddle.net>,
Eduardo Habkost <ehabkost@redhat.com>,
"Michael S . Tsirkin" <mst@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
kvm@vger.kernel.org, Boris Petkov <bp@suse.de>,
Tony Luck <tony.luck@intel.com>,
Andi Kleen <andi.kleen@intel.com>
Subject: Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg
Date: Mon, 20 Jun 2016 15:20:30 +0800 [thread overview]
Message-ID: <20160620072030.kyfc2mrsc2ggaljz@hz-desktop> (raw)
In-Reply-To: <ceea1c28-09b4-6a65-0394-0dee438d1d4c@redhat.com>
On 06/20/16 08:56, Paolo Bonzini wrote:
>
>
> On 20/06/2016 05:09, Haozhong Zhang wrote:
> > In the current nested VMX implementation in QEMU, setup
> > MSR_IA32_FEATURE_CONTROL is left to guest. So I think, for LMCE which
> > is another feature involving MSR_IA32_FEATURE_CONTROL, we may follow
> > the existing code.
> >
> > Paolo and Radim, is there any case that objects to setting
> > MSR_IA32_FEATURE_CONTROL in QEMU?
>
> If the SDM says that the reset state of the MSR is zero, QEMU should
> initialize it to zero.
>
Yes, SDM says "This MSR is cleared to zero when a logical processor is
reset" (in section "Enabling and Entering VMX operation"), so we
should do so in qemu as well.
Thanks,
Haozhong
next prev parent reply other threads:[~2016-06-20 7:20 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 6:06 [Qemu-devel] [PATCH v4 0/3] Add QEMU support for Intel local MCE Haozhong Zhang
2016-06-16 6:06 ` [Qemu-devel] [PATCH v4 1/3] target-i386: KVM: add basic Intel LMCE support Haozhong Zhang
2016-06-16 9:50 ` Paolo Bonzini
2016-06-16 10:16 ` Haozhong Zhang
2016-06-16 10:23 ` Paolo Bonzini
2016-06-16 10:34 ` Haozhong Zhang
2016-06-16 10:42 ` Paolo Bonzini
2016-06-16 18:05 ` Eduardo Habkost
2016-06-16 18:17 ` Paolo Bonzini
2016-06-16 19:37 ` Eduardo Habkost
2016-06-17 1:26 ` Haozhong Zhang
2016-06-17 16:20 ` Eduardo Habkost
2016-06-20 2:04 ` Haozhong Zhang
2016-06-16 6:06 ` [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE Haozhong Zhang
2016-06-16 9:51 ` Paolo Bonzini
2016-06-16 10:29 ` Haozhong Zhang
2016-06-16 10:41 ` Paolo Bonzini
2016-06-16 10:55 ` Haozhong Zhang
2016-06-16 17:36 ` Eduardo Habkost
2016-06-16 17:40 ` Paolo Bonzini
2016-06-16 17:58 ` Eduardo Habkost
2016-06-17 2:01 ` Haozhong Zhang
2016-06-17 17:20 ` Eduardo Habkost
2016-06-17 17:26 ` Paolo Bonzini
2016-06-20 2:11 ` Haozhong Zhang
2016-06-20 6:58 ` Paolo Bonzini
2016-06-20 7:26 ` Haozhong Zhang
2016-06-16 19:53 ` Eduardo Habkost
2016-06-16 6:06 ` [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg Haozhong Zhang
2016-06-16 9:52 ` Paolo Bonzini
2016-06-16 11:19 ` Haozhong Zhang
2016-06-17 17:31 ` Laszlo Ersek
2016-06-17 20:21 ` Raj, Ashok
2016-06-17 20:48 ` Laszlo Ersek
2016-06-17 20:55 ` Raj, Ashok
2016-06-17 21:30 ` Laszlo Ersek
2016-06-20 3:09 ` Haozhong Zhang
2016-06-20 6:56 ` Paolo Bonzini
2016-06-20 7:20 ` Haozhong Zhang [this message]
2016-06-22 10:18 ` Haozhong Zhang
2016-06-22 15:51 ` Laszlo Ersek
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