[mirror_ubuntu-bionic-kernel.git] / arch / x86 / include / asm / fpu / xstate.h

#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(const void *kbuf, struct xregs_state *xsave);
int copy_user_to_xstate(const void *kbuf, const void __user *ubuf, struct xregs_state *xsave);
#endif
Commit	Line	Data
	1	#ifndef __ASM_X86_XSAVE_H
	2	#define __ASM_X86_XSAVE_H
	3
	4	#include <linux/types.h>
	5	#include <asm/processor.h>
	6	#include <linux/uaccess.h>
	7
	8	/* Bit 63 of XCR0 is reserved for future expansion */
	9	#define XFEATURE_MASK_EXTEND (~(XFEATURE_MASK_FPSSE \| (1ULL << 63)))
	10
	11	#define XSTATE_CPUID 0x0000000d
	12
	13	#define FXSAVE_SIZE 512
	14
	15	#define XSAVE_HDR_SIZE 64
	16	#define XSAVE_HDR_OFFSET FXSAVE_SIZE
	17
	18	#define XSAVE_YMM_SIZE 256
	19	#define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
	20
	21	/* Supervisor features */
	22	#define XFEATURE_MASK_SUPERVISOR (XFEATURE_MASK_PT)
	23
	24	/* All currently supported features */
	25	#define XCNTXT_MASK (XFEATURE_MASK_FP \| \
	26	XFEATURE_MASK_SSE \| \
	27	XFEATURE_MASK_YMM \| \
	28	XFEATURE_MASK_OPMASK \| \
	29	XFEATURE_MASK_ZMM_Hi256 \| \
	30	XFEATURE_MASK_Hi16_ZMM \| \
	31	XFEATURE_MASK_PKRU \| \
	32	XFEATURE_MASK_BNDREGS \| \
	33	XFEATURE_MASK_BNDCSR)
	34
	35	#ifdef CONFIG_X86_64
	36	#define REX_PREFIX "0x48, "
	37	#else
	38	#define REX_PREFIX
	39	#endif
	40
	41	extern u64 xfeatures_mask;
	42	extern u64 xstate_fx_sw_bytes[USER_XSTATE_FX_SW_WORDS];
	43
	44	extern void __init update_regset_xstate_info(unsigned int size,
	45	u64 xstate_mask);
	46
	47	void fpu__xstate_clear_all_cpu_caps(void);
	48	void get_xsave_addr(struct xregs_state xsave, int xstate);
	49	const void *get_xsave_field_ptr(int xstate_field);
	50	int using_compacted_format(void);
	51	int copy_xstate_to_kernel(void kbuf, struct xregs_state xsave, unsigned int offset, unsigned int size);
	52	int copy_xstate_to_user(void __user ubuf, struct xregs_state xsave, unsigned int offset, unsigned int size);
	53	int copy_kernel_to_xstate(const void kbuf, struct xregs_state xsave);
	54	int copy_user_to_xstate(const void kbuf, const void __user ubuf, struct xregs_state *xsave);
	55	#endif