Release 4.14 arch/x86/include/asm/fpu/xstate.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_X86_XSAVE_H
#define __ASM_X86_XSAVE_H
#include <linux/types.h>
#include <asm/processor.h>
#include <linux/uaccess.h>
/* Bit 63 of XCR0 is reserved for future expansion */
#define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE | (1ULL << 63)))
#define XSTATE_CPUID 0x0000000d
#define FXSAVE_SIZE 512
#define XSAVE_HDR_SIZE 64
#define XSAVE_HDR_OFFSET FXSAVE_SIZE
#define XSAVE_YMM_SIZE 256
#define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
/* Supervisor features */
#define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT)
/* All currently supported features */
#define XCNTXT_MASK (XFEATURE_MASK_FP | \
XFEATURE_MASK_SSE | \
XFEATURE_MASK_YMM | \
XFEATURE_MASK_OPMASK | \
XFEATURE_MASK_ZMM_Hi256 | \
XFEATURE_MASK_Hi16_ZMM | \
XFEATURE_MASK_PKRU | \
XFEATURE_MASK_BNDREGS | \
XFEATURE_MASK_BNDCSR)
#ifdef CONFIG_X86_64
#define REX_PREFIX "0x48, "
#else
#define REX_PREFIX
#endif
extern u64 xfeatures_mask;
extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS];
extern void __init update_regset_xstate_info(unsigned int size,
u64 xstate_mask);
void fpu__xstate_clear_all_cpu_caps(void);
void *get_xsave_addr(struct xregs_state *xsave, int xstate);
const void *get_xsave_field_ptr(int xstate_field);
int using_compacted_format(void);
int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size);
int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size);
int copy_kernel_to_xstate(struct xregs_state *xsave, const void *kbuf);
int copy_user_to_xstate(struct xregs_state *xsave, const void __user *ubuf);
/* Validate an xstate header supplied by userspace (ptrace or sigreturn) */
extern int validate_xstate_header(const struct xstate_header *hdr);
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ingo Molnar | 59 | 27.70% | 10 | 34.48% |
| Suresh B. Siddha | 52 | 24.41% | 3 | 10.34% |
| Yu-cheng Yu | 33 | 15.49% | 3 | 10.34% |
| Dave Hansen | 17 | 7.98% | 3 | 10.34% |
| Sheng Yang | 16 | 7.51% | 2 | 6.90% |
| Eric Biggers | 12 | 5.63% | 1 | 3.45% |
| Fenghua Yu | 12 | 5.63% | 1 | 3.45% |
| H. Peter Anvin | 5 | 2.35% | 1 | 3.45% |
| Liu Jinsong | 3 | 1.41% | 1 | 3.45% |
| Greg Kroah-Hartman | 1 | 0.47% | 1 | 3.45% |
| Andrew Lutomirski | 1 | 0.47% | 1 | 3.45% |
| Kees Cook | 1 | 0.47% | 1 | 3.45% |
| Qiaowei Ren | 1 | 0.47% | 1 | 3.45% |
| Total | 213 | 100.00% | 29 | 100.00% |
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