Re: [PATCH v1 1/1] x86: Skip WBINVD instruction for VM guest

Sathyanarayanan Kuppuswamy
2021-11-16T16:36:58Z

Hi,

On 11/16/21 8:24 AM, Borislav Petkov wrote:
> On Mon, Nov 15, 2021 at 04:50:27PM -0800, Kuppuswamy Sathyanarayanan wrote:
>> -#define ACPI_FLUSH_CPU_CACHE() wbinvd()
>> +#define ACPI_FLUSH_CPU_CACHE() \
>> +do { \
>> + if (!boot_cpu_has(X86_FEATURE_HYPERVISOR)) \
>
> cpu_feature_enabled()
>
> If you wanna query a X86_FEATURE_* bit, from now on, use only this
> function.
>

Ok. I will change it in next version.

--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer