Re: [git pull] x86 PAT changes

Gabriel C
2008-04-26T13:40:56Z

Ingo Molnar wrote:
> Linus, please pull the x86-pat git tree from:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat.git for-linus
>
> this adds the second (and final) phase of the x86 PAT changes. Due to
> generic impact (the drivers/char/mem.c and include/asm-generic/iomap.h
> changes) this is offered as a separate tree.
>
> The new CONFIG_NONPROMISC_DEVMEM defaults to disabled so PAT will be
> disabled, to stay compatible and to be a bit cautious/gradual.
>

Hi Ingo,

When using an 64bit ( didn't got time to test 32bit now ) kernel[1] with PAT enabled , kvm-intel
does not work anymore.

When modprobing kvm-intel , kvm is saying VT extension is disable by BIOS which isn't true.
When disabling PAT again ( no changes to BIOS ) kvm-intel works again here.

Is that an known problem ?

If you need more infos just let me know.

Gabriel

[1] 2.6.25-05096-gb1721d0-dirty