On 11/01/2010 05:58 PM, Marcelo Tosatti wrote:
On Sun, Oct 24, 2010 at 03:38:46PM +0200, Avi Kivity wrote:
> This allows Linux to mask cpuid bits if, for example, nx is enabled on only
> some cpus.
>
> Signed-off-by: Avi Kivity<[email protected]>
> ---
> arch/x86/kvm/x86.c | 9 +++++++++
> 1 files changed, 9 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 48ce015..54fda7e 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -2229,6 +2229,11 @@ out:
> return r;
> }
>
> +static void cpuid_mask(u32 *word, int wordnum)
> +{
> + *word&= boot_cpu_data.x86_capability[wordnum];
> +}
> +
> static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
> u32 index)
> {
> @@ -2303,7 +2308,9 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry, u32 function,
> break;
> case 1:
> entry->edx&= kvm_supported_word0_x86_features;
> + cpuid_mask(&entry->edx, 0);
> entry->ecx&= kvm_supported_word4_x86_features;
> + cpuid_mask(&entry->edx, 4);
ecx?
Yes. Will repost.
--
error compiling committee.c: too many arguments to function
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