Re: [X86] Add a boot parameter to force-enable PAT
From: Mikael Pettersson
Date: Tue May 20 2008 - 10:41:58 EST
Dave Jones writes:
> On Mon, May 19, 2008 at 10:53:58PM -0700, Yinghai Lu wrote:
>
> > you don't need to set that bit again...
> >
> > prevoious !test_cpu_cap(..) already get out.
>
>
> * Add an enablepat boot parameter, useful for testing CPUs not yet
> added to the whitelist.
> * Don't try to enable PAT if it was never enabled in the first place.
>
> Signed-off-by: Dave Jones <davej@xxxxxxxxxx>
>
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index 72c07a0..e179c22 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -236,6 +236,10 @@ and is between 256 and 4096 characters. It is defined in the file
> try_unsupported: try to drive unsupported chipsets
> (may crash computer or cause data corruption)
>
> + enablepat [i386,x86-64]
> + Force the CPU's PAT feature to be used even if it
> + isn't in the kernels whitelist.
s/kernels/kernel's/
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