arch/x86/kvm/fpu.h

Source file repositories/reference/linux-study-clean/arch/x86/kvm/fpu.h

File Facts

System
Linux kernel
Corpus path
arch/x86/kvm/fpu.h
Extension
.h
Size
7120 bytes
Lines
207
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __KVM_FPU_H_
#define __KVM_FPU_H_

#include <asm/fpu/api.h>

typedef u32		__attribute__((vector_size(16))) sse128_t;
#define __sse128_u	union { sse128_t vec; u64 as_u64[2]; u32 as_u32[4]; }
#define sse128_lo(x)	({ __sse128_u t; t.vec = x; t.as_u64[0]; })
#define sse128_hi(x)	({ __sse128_u t; t.vec = x; t.as_u64[1]; })
#define sse128_l0(x)	({ __sse128_u t; t.vec = x; t.as_u32[0]; })
#define sse128_l1(x)	({ __sse128_u t; t.vec = x; t.as_u32[1]; })
#define sse128_l2(x)	({ __sse128_u t; t.vec = x; t.as_u32[2]; })
#define sse128_l3(x)	({ __sse128_u t; t.vec = x; t.as_u32[3]; })
#define sse128(lo, hi)	({ __sse128_u t; t.as_u64[0] = lo; t.as_u64[1] = hi; t.vec; })

typedef u32		__attribute__((vector_size(32))) avx256_t;

static inline void _kvm_read_avx_reg(int reg, avx256_t *data)
{
	switch (reg) {
	case 0:  asm("vmovdqa %%ymm0,  %0" : "=m"(*data)); break;
	case 1:  asm("vmovdqa %%ymm1,  %0" : "=m"(*data)); break;
	case 2:  asm("vmovdqa %%ymm2,  %0" : "=m"(*data)); break;
	case 3:  asm("vmovdqa %%ymm3,  %0" : "=m"(*data)); break;
	case 4:  asm("vmovdqa %%ymm4,  %0" : "=m"(*data)); break;
	case 5:  asm("vmovdqa %%ymm5,  %0" : "=m"(*data)); break;
	case 6:  asm("vmovdqa %%ymm6,  %0" : "=m"(*data)); break;
	case 7:  asm("vmovdqa %%ymm7,  %0" : "=m"(*data)); break;
#ifdef CONFIG_X86_64
	case 8:  asm("vmovdqa %%ymm8,  %0" : "=m"(*data)); break;
	case 9:  asm("vmovdqa %%ymm9,  %0" : "=m"(*data)); break;
	case 10: asm("vmovdqa %%ymm10, %0" : "=m"(*data)); break;
	case 11: asm("vmovdqa %%ymm11, %0" : "=m"(*data)); break;
	case 12: asm("vmovdqa %%ymm12, %0" : "=m"(*data)); break;
	case 13: asm("vmovdqa %%ymm13, %0" : "=m"(*data)); break;
	case 14: asm("vmovdqa %%ymm14, %0" : "=m"(*data)); break;
	case 15: asm("vmovdqa %%ymm15, %0" : "=m"(*data)); break;
#endif
	default: BUG();
	}
}

static inline void _kvm_write_avx_reg(int reg, const avx256_t *data)
{
	switch (reg) {
	case 0:  asm("vmovdqa %0, %%ymm0"  : : "m"(*data)); break;
	case 1:  asm("vmovdqa %0, %%ymm1"  : : "m"(*data)); break;
	case 2:  asm("vmovdqa %0, %%ymm2"  : : "m"(*data)); break;
	case 3:  asm("vmovdqa %0, %%ymm3"  : : "m"(*data)); break;
	case 4:  asm("vmovdqa %0, %%ymm4"  : : "m"(*data)); break;
	case 5:  asm("vmovdqa %0, %%ymm5"  : : "m"(*data)); break;
	case 6:  asm("vmovdqa %0, %%ymm6"  : : "m"(*data)); break;
	case 7:  asm("vmovdqa %0, %%ymm7"  : : "m"(*data)); break;
#ifdef CONFIG_X86_64
	case 8:  asm("vmovdqa %0, %%ymm8"  : : "m"(*data)); break;
	case 9:  asm("vmovdqa %0, %%ymm9"  : : "m"(*data)); break;
	case 10: asm("vmovdqa %0, %%ymm10" : : "m"(*data)); break;
	case 11: asm("vmovdqa %0, %%ymm11" : : "m"(*data)); break;
	case 12: asm("vmovdqa %0, %%ymm12" : : "m"(*data)); break;
	case 13: asm("vmovdqa %0, %%ymm13" : : "m"(*data)); break;
	case 14: asm("vmovdqa %0, %%ymm14" : : "m"(*data)); break;
	case 15: asm("vmovdqa %0, %%ymm15" : : "m"(*data)); break;
#endif
	default: BUG();
	}
}

static inline void _kvm_read_sse_reg(int reg, sse128_t *data)
{
	switch (reg) {
	case 0: asm("movdqa %%xmm0, %0" : "=m"(*data)); break;
	case 1: asm("movdqa %%xmm1, %0" : "=m"(*data)); break;
	case 2: asm("movdqa %%xmm2, %0" : "=m"(*data)); break;
	case 3: asm("movdqa %%xmm3, %0" : "=m"(*data)); break;
	case 4: asm("movdqa %%xmm4, %0" : "=m"(*data)); break;
	case 5: asm("movdqa %%xmm5, %0" : "=m"(*data)); break;
	case 6: asm("movdqa %%xmm6, %0" : "=m"(*data)); break;
	case 7: asm("movdqa %%xmm7, %0" : "=m"(*data)); break;
#ifdef CONFIG_X86_64
	case 8: asm("movdqa %%xmm8, %0" : "=m"(*data)); break;
	case 9: asm("movdqa %%xmm9, %0" : "=m"(*data)); break;
	case 10: asm("movdqa %%xmm10, %0" : "=m"(*data)); break;
	case 11: asm("movdqa %%xmm11, %0" : "=m"(*data)); break;
	case 12: asm("movdqa %%xmm12, %0" : "=m"(*data)); break;
	case 13: asm("movdqa %%xmm13, %0" : "=m"(*data)); break;
	case 14: asm("movdqa %%xmm14, %0" : "=m"(*data)); break;
	case 15: asm("movdqa %%xmm15, %0" : "=m"(*data)); break;
#endif
	default: BUG();
	}

Annotation

Implementation Notes