1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef __KVM_FPU_H_
4 #define __KVM_FPU_H_
5
6 #include <asm/fpu/api.h>
7
8 typedef u32 __attribute__((vector_size(16))) sse128_t;
9 #define __sse128_u union { sse128_t vec; u64 as_u64[2]; u32 as_u32[4]; }
10 #define sse128_lo(x) ({ __sse128_u t; t.vec = x; t.as_u64[0]; })
11 #define sse128_hi(x) ({ __sse128_u t; t.vec = x; t.as_u64[1]; })
12 #define sse128_l0(x) ({ __sse128_u t; t.vec = x; t.as_u32[0]; })
13 #define sse128_l1(x) ({ __sse128_u t; t.vec = x; t.as_u32[1]; })
14 #define sse128_l2(x) ({ __sse128_u t; t.vec = x; t.as_u32[2]; })
15 #define sse128_l3(x) ({ __sse128_u t; t.vec = x; t.as_u32[3]; })
16 #define sse128(lo, hi) ({ __sse128_u t; t.as_u64[0] = lo; t.as_u64[1] = hi; t.vec; })
17
18 static inline void _kvm_read_sse_reg(int reg, sse128_t *data)
19 {
20 switch (reg) {
21 case 0: asm("movdqa %%xmm0, %0" : "=m"(*data)); break;
22 case 1: asm("movdqa %%xmm1, %0" : "=m"(*data)); break;
23 case 2: asm("movdqa %%xmm2, %0" : "=m"(*data)); break;
24 case 3: asm("movdqa %%xmm3, %0" : "=m"(*data)); break;
25 case 4: asm("movdqa %%xmm4, %0" : "=m"(*data)); break;
26 case 5: asm("movdqa %%xmm5, %0" : "=m"(*data)); break;
27 case 6: asm("movdqa %%xmm6, %0" : "=m"(*data)); break;
28 case 7: asm("movdqa %%xmm7, %0" : "=m"(*data)); break;
29 #ifdef CONFIG_X86_64
30 case 8: asm("movdqa %%xmm8, %0" : "=m"(*data)); break;
31 case 9: asm("movdqa %%xmm9, %0" : "=m"(*data)); break;
32 case 10: asm("movdqa %%xmm10, %0" : "=m"(*data)); break;
33 case 11: asm("movdqa %%xmm11, %0" : "=m"(*data)); break;
34 case 12: asm("movdqa %%xmm12, %0" : "=m"(*data)); break;
35 case 13: asm("movdqa %%xmm13, %0" : "=m"(*data)); break;
36 case 14: asm("movdqa %%xmm14, %0" : "=m"(*data)); break;
37 case 15: asm("movdqa %%xmm15, %0" : "=m"(*data)); break;
38 #endif
39 default: BUG();
40 }
41 }
42
43 static inline void _kvm_write_sse_reg(int reg, const sse128_t *data)
44 {
45 switch (reg) {
46 case 0: asm("movdqa %0, %%xmm0" : : "m"(*data)); break;
47 case 1: asm("movdqa %0, %%xmm1" : : "m"(*data)); break;
48 case 2: asm("movdqa %0, %%xmm2" : : "m"(*data)); break;
49 case 3: asm("movdqa %0, %%xmm3" : : "m"(*data)); break;
50 case 4: asm("movdqa %0, %%xmm4" : : "m"(*data)); break;
51 case 5: asm("movdqa %0, %%xmm5" : : "m"(*data)); break;
52 case 6: asm("movdqa %0, %%xmm6" : : "m"(*data)); break;
53 case 7: asm("movdqa %0, %%xmm7" : : "m"(*data)); break;
54 #ifdef CONFIG_X86_64
55 case 8: asm("movdqa %0, %%xmm8" : : "m"(*data)); break;
56 case 9: asm("movdqa %0, %%xmm9" : : "m"(*data)); break;
57 case 10: asm("movdqa %0, %%xmm10" : : "m"(*data)); break;
58 case 11: asm("movdqa %0, %%xmm11" : : "m"(*data)); break;
59 case 12: asm("movdqa %0, %%xmm12" : : "m"(*data)); break;
60 case 13: asm("movdqa %0, %%xmm13" : : "m"(*data)); break;
61 case 14: asm("movdqa %0, %%xmm14" : : "m"(*data)); break;
62 case 15: asm("movdqa %0, %%xmm15" : : "m"(*data)); break;
63 #endif
64 default: BUG();
65 }
66 }
67
68 static inline void _kvm_read_mmx_reg(int reg, u64 *data)
69 {
70 switch (reg) {
71 case 0: asm("movq %%mm0, %0" : "=m"(*data)); break;
72 case 1: asm("movq %%mm1, %0" : "=m"(*data)); break;
73 case 2: asm("movq %%mm2, %0" : "=m"(*data)); break;
74 case 3: asm("movq %%mm3, %0" : "=m"(*data)); break;
75 case 4: asm("movq %%mm4, %0" : "=m"(*data)); break;
76 case 5: asm("movq %%mm5, %0" : "=m"(*data)); break;
77 case 6: asm("movq %%mm6, %0" : "=m"(*data)); break;
78 case 7: asm("movq %%mm7, %0" : "=m"(*data)); break;
79 default: BUG();
80 }
81 }
82
83 static inline void _kvm_write_mmx_reg(int reg, const u64 *data)
84 {
85 switch (reg) {
86 case 0: asm("movq %0, %%mm0" : : "m"(*data)); break;
87 case 1: asm("movq %0, %%mm1" : : "m"(*data)); break;
88 case 2: asm("movq %0, %%mm2" : : "m"(*data)); break;
89 case 3: asm("movq %0, %%mm3" : : "m"(*data)); break;
90 case 4: asm("movq %0, %%mm4" : : "m"(*data)); break;
91 case 5: asm("movq %0, %%mm5" : : "m"(*data)); break;
92 case 6: asm("movq %0, %%mm6" : : "m"(*data)); break;
93 case 7: asm("movq %0, %%mm7" : : "m"(*data)); break;
94 default: BUG();
95 }
96 }
97
98 static inline void kvm_fpu_get(void)
99 {
100 fpregs_lock();
101
102 fpregs_assert_state_consistent();
103 if (test_thread_flag(TIF_NEED_FPU_LOAD))
104 switch_fpu_return();
105 }
106
107 static inline void kvm_fpu_put(void)
108 {
109 fpregs_unlock();
110 }
111
112 static inline void kvm_read_sse_reg(int reg, sse128_t *data)
113 {
114 kvm_fpu_get();
115 _kvm_read_sse_reg(reg, data);
116 kvm_fpu_put();
117 }
118
119 static inline void kvm_write_sse_reg(int reg, const sse128_t *data)
120 {
121 kvm_fpu_get();
122 _kvm_write_sse_reg(reg, data);
123 kvm_fpu_put();
124 }
125
126 static inline void kvm_read_mmx_reg(int reg, u64 *data)
127 {
128 kvm_fpu_get();
129 _kvm_read_mmx_reg(reg, data);
130 kvm_fpu_put();
131 }
132
133 static inline void kvm_write_mmx_reg(int reg, const u64 *data)
134 {
135 kvm_fpu_get();
136 _kvm_write_mmx_reg(reg, data);
137 kvm_fpu_put();
138 }
139
140 #endif
141
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