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[Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest |
Date: |
Wed, 6 Oct 2010 13:05:31 -0300 |
User-agent: |
Mutt/1.5.20 (2009-08-17) |
On Wed, Oct 06, 2010 at 10:58:36AM +0900, Hidetoshi Seto wrote:
> I got some more question:
>
> (2010/10/05 3:54), Marcelo Tosatti wrote:
> > Index: qemu/target-i386/cpu.h
> > ===================================================================
> > --- qemu.orig/target-i386/cpu.h
> > +++ qemu/target-i386/cpu.h
> > @@ -250,16 +250,32 @@
> > #define PG_ERROR_RSVD_MASK 0x08
> > #define PG_ERROR_I_D_MASK 0x10
> >
> > -#define MCG_CTL_P (1UL<<8) /* MCG_CAP register available */
> > +#define MCG_CTL_P (1ULL<<8) /* MCG_CAP register available */
> > +#define MCG_SER_P (1ULL<<24) /* MCA recovery/new status bits */
> >
> > -#define MCE_CAP_DEF MCG_CTL_P
> > +#define MCE_CAP_DEF (MCG_CTL_P|MCG_SER_P)
> > #define MCE_BANKS_DEF 10
> >
>
> It seems that current kvm doesn't support SER_P, so injecting SRAO
> to guest will mean that guest receives VAL|UC|!PCC and RIPV event
> from virtual processor that doesn't have SER_P.
Dean also noted this. I don't think it was deliberate choice to not
expose SER_P. Huang?
> I think most OSes don't expect that it can receives MCE with !PCC
> on traditional x86 processor without SER_P.
>
> Q1: Is it safe to expect that guests can handle such !PCC event?
> Q2: What is the expected behavior on the guest?
> Q3: What happen if guest reboots itself in response to the MCE?
>
>
> Thanks,
> H.Seto
- [Qemu-devel] Re: [patch uq/master 5/8] Export qemu_ram_addr_from_host, (continued)
[Qemu-devel] [patch uq/master 3/8] Expose thread_id in info cpus, Marcelo Tosatti, 2010/10/04
[Qemu-devel] [patch uq/master 4/8] kvm: x86: add mce support, Marcelo Tosatti, 2010/10/04
[Qemu-devel] [patch uq/master 2/8] iothread: use signalfd, Marcelo Tosatti, 2010/10/04
[Qemu-devel] [patch uq/master 1/8] signalfd compatibility, Marcelo Tosatti, 2010/10/04
[Qemu-devel] [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Marcelo Tosatti, 2010/10/04
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Hidetoshi Seto, 2010/10/05
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Hidetoshi Seto, 2010/10/05
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest,
Marcelo Tosatti <=
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Dean Nelson, 2010/10/06
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Hidetoshi Seto, 2010/10/06
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Dean Nelson, 2010/10/07
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Huang Ying, 2010/10/07
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Hidetoshi Seto, 2010/10/08
- [Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Dean Nelson, 2010/10/08
[Qemu-devel] Re: [patch uq/master 7/8] MCE: Relay UCR MCE to guest, Huang Ying, 2010/10/07
Re: [Qemu-devel] [patch uq/master 0/8] port qemu-kvm's MCE support, Andreas Färber, 2010/10/05