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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-11-28 19:01:00 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-11-28 19:01:00 +0100 |
| commit | 231bd7fdc04517389135a4958294cf7630617385 (patch) | |
| tree | 9713adf90a38c8cd89e8e034f84104055ca597cb | |
| parent | 9dd636371312ef48fa5f6bc068360ce81d2e367f (diff) | |
x86: Drop XSAVE support limitation
Now that XSAVEOPT is supported, we are fine with supporting large FPU
state.
* i386/i386/fpu.c (init_fpu): Do not limit fp_xsave_support to
CPU_XCR0_SUPPORTED.
* i386/i386/fpu.h (CPU_XCR0_SUPPORTED): Remove macro.
| -rw-r--r-- | i386/i386/fpu.c | 1 | ||||
| -rw-r--r-- | i386/i386/fpu.h | 3 |
2 files changed, 0 insertions, 4 deletions
diff --git a/i386/i386/fpu.c b/i386/i386/fpu.c index 1a2830bd..b177dad2 100644 --- a/i386/i386/fpu.c +++ b/i386/i386/fpu.c @@ -162,7 +162,6 @@ init_fpu(void) ecx = 0x0; cpuid(eax, ebx, ecx, edx); fp_xsave_support = eax + (((uint64_t) edx) << 32); - fp_xsave_support &= CPU_XCR0_SUPPORTED; #ifndef MACH_RING1 set_cr4(get_cr4() | CR4_OSFXSR | CR4_OSXSAVE); diff --git a/i386/i386/fpu.h b/i386/i386/fpu.h index deae1271..c77cc96d 100644 --- a/i386/i386/fpu.h +++ b/i386/i386/fpu.h @@ -107,9 +107,6 @@ static inline void set_xcr0(uint64_t value) { #define CPU_FEATURE_XGETBV1 (1 << 2) #define CPU_FEATURE_XSAVES (1 << 3) -/* This is the set we support for now in our struct i386_xfp_save */ -#define CPU_XCR0_SUPPORTED (CPU_XCR0_X87 | CPU_XCR0_SSE | CPU_XCR0_AVX) - #define xsave(state) \ asm volatile("xsave %0" \ : "=m" (*state) \ |