1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_FPU_XCR_H 3 #define _ASM_X86_FPU_XCR_H 4 5 /* 6 * MXCSR and XCR definitions: 7 */ 8 9 static inline void ldmxcsr(u32 mxcsr) 10 { 11 asm volatile("ldmxcsr %0" :: "m" (mxcsr)); 12 } 13 14 extern unsigned int mxcsr_feature_mask; 15 16 #define XCR_XFEATURE_ENABLED_MASK 0x00000000 17 18 static inline u64 xgetbv(u32 index) 19 { 20 u32 eax, edx; 21 22 asm volatile("xgetbv" : "=a" (eax), "=d" (edx) : "c" (index)); 23 return eax + ((u64)edx << 32); 24 } 25 26 static inline void xsetbv(u32 index, u64 value) 27 { 28 u32 eax = value; 29 u32 edx = value >> 32; 30 31 asm volatile("xsetbv" :: "a" (eax), "d" (edx), "c" (index)); 32 } 33 34 #endif /* _ASM_X86_FPU_XCR_H */ 35