On 2018/11/8 1:41, Tim Chen wrote:
> On 11/06/2018 10:23 AM, Aubrey Li wrote:
>
>> +static inline void update_avx_state(struct avx_state *avx)
>> +{
>> +/*
>> + * Check if XGETBV with ECX = 1 supported. XGETBV with ECX = 1
>> + * returns the logical-AND of XCR0 and XINUSE. XINUSE is a
On 11/06/2018 10:23 AM, Aubrey Li wrote:
> +static inline void update_avx_state(struct avx_state *avx)
> +{
> + /*
> + * Check if XGETBV with ECX = 1 supported. XGETBV with ECX = 1
> + * returns the logical-AND of XCR0 and XINUSE. XINUSE is a bitmap
> + * by which the processor
XSAVES and its variants use init optimization to reduce the amount of
data that they save to memory during context switch. Init optimization
uses the state component bitmap to denote if a component is in its init
configuration. We use this information to detect if a task contains AVX
instructions.
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