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Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older c
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types |
Date: |
Wed, 29 Aug 2012 13:31:13 +0300 |
On Wed, Aug 29, 2012 at 01:23:24PM +0300, Michael S. Tsirkin wrote:
> > Michael, not migrating the PVEOI MSR actually crashes the guest?
>
>
> Not at all. migration currently simply disables PV EOI, so
> each EOI triggers exits after migration.
I would like to add: without this patch guest will crash.
But what will crash guest is *not* the fact
we do not migrate the PV EOI MSR.
It is the fact that PV EOI bit is set in CPUID.
If guest reads CPUID before migration and then
writes the MSR after migration, it will crash.
> --
> MST
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, (continued)
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Michael S. Tsirkin, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Eduardo Habkost, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Michael S. Tsirkin, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Eduardo Habkost, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Michael S. Tsirkin, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Eduardo Habkost, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Marcelo Tosatti, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Marcelo Tosatti, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Michael S. Tsirkin, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Michael S. Tsirkin, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Juan Quintela, 2012/08/29
Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Anthony Liguori, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Gleb Natapov, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Anthony Liguori, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Michael S. Tsirkin, 2012/08/29
- Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Eduardo Habkost, 2012/08/29
- [Qemu-devel] [QEMU 1.2 PATCH] i386: kvm: have a predefined set of default KVM feature bits, Eduardo Habkost, 2012/08/29
- Re: [Qemu-devel] [QEMU 1.2 PATCH] i386: kvm: have a predefined set of default KVM feature bits, Michael S. Tsirkin, 2012/08/29
- Re: [Qemu-devel] [QEMU 1.2 PATCH] i386: kvm: have a predefined set of default KVM feature bits, Marcelo Tosatti, 2012/08/29
Re: [Qemu-devel] [PATCHv4 3/4] cpuid: disable pv eoi for 1.1 and older compat types, Eduardo Habkost, 2012/08/29