diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-11-28 16:30:29 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-11-28 17:46:32 +0100 |
| commit | b885c5ea26fb3c2f2d91b6e9a1495070da429ea4 (patch) | |
| tree | 787f167688bf7518b62241fa55c539da3fa53ed5 /linux | |
| parent | 44e3fb20a17dac403ec022a9c4d41dc237f3c79d (diff) | |
x86: Add XSAVE support
* i386/i386/fpu.h (CPU_XCR0_X87, CPU_XCR0_SSE, CPU_XCR0_AVX,
CPU_XCR0_MPX, CPU_XCR0_AVX512): New macros.
(xsave): Pass fp_xsave_support to xsave.
(fpu_save_context): When fp_kind is FP_387X, use xsave.
(fp_xsave_support): New variable declaration.
* i386/i386/proc_reg.h (cpuid): New macro.
* linux/src/include/asm-i386/processor.h (cpuid): Disable macro.
* i386/include/mach/i386/fp_reg.h: Include <stdint.h>
(i386_xfp_xstate_header): New structure.
(i386_xfp_save): Add xsave fields.
* i386/i386/fpu.c (fp_xsave_support): New variable.
(init_fpu): Look for XSAVE feature; if available, get the supported
parts and set fp_kind to FP_387X.
(fpu_module_init): Set ifps_cache alignment to alignof(struct
i386_fpsave_state).
(fpu_set_state): Make sure to clear all the ifps structure.
Reuse the FP_387FX for the FP_387X case.
(fpu_get_state, fpexterrflt, fpastintr, fp_state_alloc): Reuse the FP_387FX
for the FP_387X case.
(fp_save): When fp_kind is FP_387X, use xsave.
(fp_load): When fp_kind is FP_387X, use xrstor.
Reuse the FP_387FX for the FP_387X case.
Diffstat (limited to 'linux')
| -rw-r--r-- | linux/src/include/asm-i386/processor.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/linux/src/include/asm-i386/processor.h b/linux/src/include/asm-i386/processor.h index 2bcacea0..b0679402 100644 --- a/linux/src/include/asm-i386/processor.h +++ b/linux/src/include/asm-i386/processor.h @@ -29,6 +29,7 @@ extern int have_cpuid; /* We have a CPUID */ extern unsigned long cpu_hz; /* CPU clock frequency from time.c */ +#if 0 /* * Detection of CPU model (CPUID). */ @@ -42,6 +43,7 @@ extern inline void cpuid(int op, int *eax, int *ebx, int *ecx, int *edx) : "a" (op) : "cc"); } +#endif /* * Cyrix CPU register indexes (use special macros to access these) |