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| author | Ingo Molnar <mingo@kernel.org> | 2015-04-28 09:40:26 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:56 +0200 |
| commit | 677b98bdd5b93d89ad58b8a4679db086dfbaa854 (patch) | |
| tree | e3d70e24658e595f7bb095fef60c9d17522c04b5 /arch/x86/include/asm/fpu/xstate.h | |
| parent | 33588b52228f6e94e970a05ead10f524f363ee44 (diff) | |
| download | lwn-677b98bdd5b93d89ad58b8a4679db086dfbaa854.tar.gz lwn-677b98bdd5b93d89ad58b8a4679db086dfbaa854.zip | |
x86/fpu: Enumerate xfeature bits
Transform the xstate masks into an enumerated list of xfeature bits.
This removes the hard coding of XFEATURES_NR_MAX.
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/fpu/xstate.h')
| -rw-r--r-- | arch/x86/include/asm/fpu/xstate.h | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index 2f2ed322263f..9b2869dea490 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -4,25 +4,39 @@ #include <linux/types.h> #include <asm/processor.h> -#define XSTATE_CPUID 0x0000000d - -#define XSTATE_FP 0x1 -#define XSTATE_SSE 0x2 -#define XSTATE_YMM 0x4 -#define XSTATE_BNDREGS 0x8 -#define XSTATE_BNDCSR 0x10 -#define XSTATE_OPMASK 0x20 -#define XSTATE_ZMM_Hi256 0x40 -#define XSTATE_Hi16_ZMM 0x80 +/* + * List of XSAVE features Linux knows about: + */ +enum xfeature_bit { + XSTATE_BIT_FP, + XSTATE_BIT_SSE, + XSTATE_BIT_YMM, + XSTATE_BIT_BNDREGS, + XSTATE_BIT_BNDCSR, + XSTATE_BIT_OPMASK, + XSTATE_BIT_ZMM_Hi256, + XSTATE_BIT_Hi16_ZMM, + + XFEATURES_NR_MAX, +}; + +#define XSTATE_FP (1 << XSTATE_BIT_FP) +#define XSTATE_SSE (1 << XSTATE_BIT_SSE) +#define XSTATE_YMM (1 << XSTATE_BIT_YMM) +#define XSTATE_BNDREGS (1 << XSTATE_BIT_BNDREGS) +#define XSTATE_BNDCSR (1 << XSTATE_BIT_BNDCSR) +#define XSTATE_OPMASK (1 << XSTATE_BIT_OPMASK) +#define XSTATE_ZMM_Hi256 (1 << XSTATE_BIT_ZMM_Hi256) +#define XSTATE_Hi16_ZMM (1 << XSTATE_BIT_Hi16_ZMM) -/* The highest xstate bit above (of XSTATE_Hi16_ZMM): */ -#define XFEATURES_NR_MAX 8 #define XSTATE_FPSSE (XSTATE_FP | XSTATE_SSE) #define XSTATE_AVX512 (XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM) /* Bit 63 of XCR0 is reserved for future expansion */ #define XSTATE_EXTEND_MASK (~(XSTATE_FPSSE | (1ULL << 63))) +#define XSTATE_CPUID 0x0000000d + #define FXSAVE_SIZE 512 #define XSAVE_HDR_SIZE 64 |