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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_FPU_XCR_H
#define _ASM_X86_FPU_XCR_H
#define XCR_XFEATURE_ENABLED_MASK 0x00000000
#define XCR_XFEATURE_IN_USE_MASK 0x00000001
static __always_inline u64 xgetbv(u32 index)
{
u32 eax, edx;
asm volatile("xgetbv" : "=a" (eax), "=d" (edx) : "c" (index));
return eax + ((u64)edx << 32);
}
static inline void xsetbv(u32 index, u64 value)
{
u32 eax = value;
u32 edx = value >> 32;
asm volatile("xsetbv" :: "a" (eax), "d" (edx), "c" (index));
}
/*
* Return a mask of xfeatures which are currently being tracked
* by the processor as being in the initial configuration.
*
* Callers should check X86_FEATURE_XGETBV1.
*/
static __always_inline u64 xfeatures_in_use(void)
{
return xgetbv(XCR_XFEATURE_IN_USE_MASK);
}
#endif /* _ASM_X86_FPU_XCR_H */
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| api.h | File | 5.6 KB | 0644 |
|
| regset.h | File | 671 B | 0644 |
|
| sched.h | File | 2.15 KB | 0644 |
|
| signal.h | File | 1.08 KB | 0644 |
|
| types.h | File | 14.4 KB | 0644 |
|
| xcr.h | File | 811 B | 0644 |
|
| xstate.h | File | 4.3 KB | 0644 |
|