656f083116
The 'copyin/copyout' nomenclature needlessly departs from what the modern FPU code uses, which is: copy_fpregs_to_fpstate() copy_fpstate_to_sigframe() copy_fregs_to_user() copy_fxregs_to_kernel() copy_fxregs_to_user() copy_kernel_to_fpregs() copy_kernel_to_fregs() copy_kernel_to_fxregs() copy_kernel_to_xregs() copy_user_to_fregs() copy_user_to_fxregs() copy_user_to_xregs() copy_xregs_to_kernel() copy_xregs_to_user() I.e. according to this pattern, the following rename should be done: copyin_to_xsaves() -> copy_user_to_xstate() copyout_from_xsaves() -> copy_xstate_to_user() or, if we want to be pedantic, denote that that the user-space format is ptrace: copyin_to_xsaves() -> copy_user_ptrace_to_xstate() copyout_from_xsaves() -> copy_xstate_to_user_ptrace() But I'd suggest the shorter, non-pedantic name. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Eric Biggers <ebiggers3@gmail.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yu-cheng Yu <yu-cheng.yu@intel.com> Link: http://lkml.kernel.org/r/20170923130016.21448-2-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
#ifndef __ASM_X86_XSAVE_H
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#define __ASM_X86_XSAVE_H
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#include <linux/types.h>
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#include <asm/processor.h>
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#include <linux/uaccess.h>
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/* Bit 63 of XCR0 is reserved for future expansion */
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#define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63)))
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#define XSTATE_CPUID 0x0000000d
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#define FXSAVE_SIZE 512
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#define XSAVE_HDR_SIZE 64
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#define XSAVE_HDR_OFFSET FXSAVE_SIZE
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#define XSAVE_YMM_SIZE 256
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#define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
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/* Supervisor features */
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#define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT)
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/* All currently supported features */
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#define XCNTXT_MASK (XFEATURE_MASK_FP | \
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XFEATURE_MASK_SSE | \
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XFEATURE_MASK_YMM | \
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XFEATURE_MASK_OPMASK | \
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XFEATURE_MASK_ZMM_Hi256 | \
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XFEATURE_MASK_Hi16_ZMM | \
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XFEATURE_MASK_PKRU | \
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XFEATURE_MASK_BNDREGS | \
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XFEATURE_MASK_BNDCSR)
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#ifdef CONFIG_X86_64
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#define REX_PREFIX "0x48, "
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#else
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#define REX_PREFIX
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#endif
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extern u64 xfeatures_mask;
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extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS];
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extern void __init update_regset_xstate_info(unsigned int size,
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u64 xstate_mask);
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void fpu__xstate_clear_all_cpu_caps(void);
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void *get_xsave_addr(struct xregs_state *xsave, int xstate);
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const void *get_xsave_field_ptr(int xstate_field);
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int using_compacted_format(void);
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int copy_xstate_to_user(unsigned int pos, unsigned int count, void *kbuf,
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void __user *ubuf, struct xregs_state *xsave);
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int copy_user_to_xstate(const void *kbuf, const void __user *ubuf,
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struct xregs_state *xsave);
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#endif
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