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Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested |
Date: |
Tue, 21 Apr 2015 17:16:22 +0200 |
On Di, 2015-04-21 at 17:08 +0200, Paolo Bonzini wrote:
>
> On 21/04/2015 17:04, Gerd Hoffmann wrote:
> > Hmm. I think if we merge all the smm / smram / tseg patches in one go
> > this should work. Without patches reading the ESMRAMC register returns
> > zero. With the patches the three cache-disable bits are hardcoded to
> > '1'. This should work for detecting tseg support.
> >
> > You also have to test for smm support. The current protocol for this is
> > that seabios checks whenever smm is already initialized (see
> > *_apmc_smm_setup() in seabios/src/fw/smm.c) and if so it skips smm
> > initialization. Right now qemu sets the bit on reset when running on
> > kvm, so seabios doesn't try to use smm. On tcg the bit is clear after
> > reset and seabios actually uses smm mode.
>
> BTW, I plan to add "-machine smm=yes/no/auto".
>
> Gerd, are you going to implement SMI_EN locking as well?
Sure, can do that while being at it.
cheers,
Gerd
- [Qemu-devel] [PATCH 1/6] [fixup] add ESMRAMC default, Gerd Hoffmann, 2015/04/20
- [Qemu-devel] [PATCH 2/6] add SMRAM+ESMRAMC wmask, Gerd Hoffmann, 2015/04/20
- [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Gerd Hoffmann, 2015/04/20
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Paolo Bonzini, 2015/04/20
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Laszlo Ersek, 2015/04/21
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Gerd Hoffmann, 2015/04/21
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Paolo Bonzini, 2015/04/21
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested,
Gerd Hoffmann <=
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Laszlo Ersek, 2015/04/21
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Gerd Hoffmann, 2015/04/22
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Gerd Hoffmann, 2015/04/22
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Laszlo Ersek, 2015/04/22
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Gerd Hoffmann, 2015/04/22
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Laszlo Ersek, 2015/04/22
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Laszlo Ersek, 2015/04/22
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Gerd Hoffmann, 2015/04/23
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Laszlo Ersek, 2015/04/23
- Re: [Qemu-devel] [PATCH 5/6] [wip] tseg, part1, not (yet) tested, Laszlo Ersek, 2015/04/23