[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_
From: |
Raj, Ashok |
Subject: |
Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg |
Date: |
Fri, 17 Jun 2016 13:21:18 -0700 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Jun 17, 2016 at 07:31:08PM +0200, Laszlo Ersek wrote:
> >>
> >> On 16/06/2016 08:06, Haozhong Zhang wrote:
> >>> It's a prerequisite that certain bits of MSR_IA32_FEATURE_CONTROL should
> >>> be set before some features (e.g. VMX and LMCE) can be used, which is
> >>> usually done by the firmware. This patch adds a fw_cfg file
> >>> "etc/msr_feature_control" which contains the advised value of
> >>> MSR_IA32_FEATURE_CONTROL and can be used by guest firmware (e.g. SeaBIOS).
> >>>
I'm sorry i'm joining this discussion a bit late returning from vacation.
In a real platform supporting LMCE, BIOS is responsible for setting the bits
for IA32_FEATURE_CONTROL correctly. There are good reasons why we want the
BIOS to play this role.
in a virtualized environment, do we really have to push the same requirement
or would it suffice to just emulate it as we did in the early patches.
Not sure what exact problem is created by just simply supporting it within
kvm/qemu and not needing the bios for the guest to also adapt these changes.
Cheers,
Ashok
- Re: [Qemu-devel] [PATCH v4 1/3] target-i386: KVM: add basic Intel LMCE support, (continued)
Re: [Qemu-devel] [PATCH v4 1/3] target-i386: KVM: add basic Intel LMCE support, Eduardo Habkost, 2016/06/16
[Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Haozhong Zhang, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Paolo Bonzini, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Haozhong Zhang, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Laszlo Ersek, 2016/06/17
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg,
Raj, Ashok <=
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Laszlo Ersek, 2016/06/17
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Raj, Ashok, 2016/06/17
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Laszlo Ersek, 2016/06/17
Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Haozhong Zhang, 2016/06/19
Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Paolo Bonzini, 2016/06/20
Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Haozhong Zhang, 2016/06/20
Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Haozhong Zhang, 2016/06/22
Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, Laszlo Ersek, 2016/06/22
[Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Haozhong Zhang, 2016/06/16