Commit b0753902 authored by Hendrik Brueckner's avatar Hendrik Brueckner Committed by Martin Schwidefsky
Browse files

s390/fpu: split fpu-internal.h into fpu internals, api, and type headers 



Split the API and FPU type definitions into separate header files
similar to "x86/fpu: Rename fpu-internal.h to fpu/internal.h" (78f7f1e5).

The new header files and their meaning are:

asm/fpu/types.h:
	FPU related data types, needed for 'struct thread_struct' and
	'struct task_struct'.

asm/fpu/api.h:
	FPU related 'public' functions for other subsystems and device
	drivers.

asm/fpu/internal.h:
	FPU internal functions mainly used to convert
	FPU register contents in signal handling.

Signed-off-by: default avatarHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 6933c35a

arch/s390/include/asm/fpu/api.h

0 → 100644
+30 −0
Original line number Diff line number Diff line 
/*

 * In-kernel FPU support functions

 *

 * Copyright IBM Corp. 2015

 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>

 */



#ifndef _ASM_S390_FPU_API_H

#define _ASM_S390_FPU_API_H



void save_fpu_regs(void);



static inline int test_fp_ctl(u32 fpc)

{

	u32 orig_fpc;

	int rc;



	asm volatile(

		"	efpc    %1\n"

		"	sfpc	%2\n"

		"0:	sfpc	%1\n"

		"	la	%0,0\n"

		"1:\n"

		EX_TABLE(0b,1b)

		: "=d" (rc), "=d" (orig_fpc)

		: "d" (fpc), "0" (-EINVAL));

	return rc;

}



#endif /* _ASM_S390_FPU_API_H */

arch/s390/include/asm/fpu-internal.h→arch/s390/include/asm/fpu/internal.h

+2 −35
Original line number Diff line number Diff line 
/*

 * General floating pointer and vector register helpers

 * FPU state and register content conversion primitives

 *

 * Copyright IBM Corp. 2015

 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
@@ -8,42 +8,9 @@ 
#ifndef _ASM_S390_FPU_INTERNAL_H

#define _ASM_S390_FPU_INTERNAL_H



#include <linux/errno.h>

#include <linux/string.h>

#include <asm/linkage.h>

#include <asm/ctl_reg.h>

#include <asm/sigcontext.h>



struct fpu {

	__u32 fpc;			/* Floating-point control */

	union {

		void *regs;

		freg_t *fprs;		/* Floating-point register save area */

		__vector128 *vxrs;	/* Vector register save area */

	};

};



void save_fpu_regs(void);



/* VX array structure for address operand constraints in inline assemblies */

struct vx_array { __vector128 _[__NUM_VXRS]; };



static inline int test_fp_ctl(u32 fpc)

{

	u32 orig_fpc;

	int rc;



	asm volatile(

		"	efpc    %1\n"

		"	sfpc	%2\n"

		"0:	sfpc	%1\n"

		"	la	%0,0\n"

		"1:\n"

		EX_TABLE(0b,1b)

		: "=d" (rc), "=d" (orig_fpc)

		: "d" (fpc), "0" (-EINVAL));

	return rc;

}

#include <asm/fpu/types.h>



static inline void save_vx_regs_safe(__vector128 *vxrs)

{

arch/s390/include/asm/fpu/types.h

0 → 100644
+25 −0
Original line number Diff line number Diff line 
/*

 * FPU data structures

 *

 * Copyright IBM Corp. 2015

 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>

 */



#ifndef _ASM_S390_FPU_TYPES_H

#define _ASM_S390_FPU_TYPES_H



#include <asm/sigcontext.h>



struct fpu {

	__u32 fpc;			/* Floating-point control */

	union {

		void *regs;

		freg_t *fprs;		/* Floating-point register save area */

		__vector128 *vxrs;	/* Vector register save area */

	};

};



/* VX array structure for address operand constraints in inline assemblies */

struct vx_array { __vector128 _[__NUM_VXRS]; };



#endif /* _ASM_S390_FPU_TYPES_H */

arch/s390/include/asm/kvm_host.h

+1 −1
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ 
#include <linux/kvm.h>

#include <asm/debug.h>

#include <asm/cpu.h>

#include <asm/fpu-internal.h>

#include <asm/fpu/api.h>

#include <asm/isc.h>



#define KVM_MAX_VCPUS 64

arch/s390/include/asm/processor.h

+3 −2
Original line number Diff line number Diff line
@@ -16,7 +16,7 @@ 
#define CIF_MCCK_PENDING	0	/* machine check handling is pending */

#define CIF_ASCE		1	/* user asce needs fixup / uaccess */

#define CIF_NOHZ_DELAY		2	/* delay HZ disable for a tick */

#define CIF_FPU			3	/* restore vector registers */

#define CIF_FPU			3	/* restore FPU registers */

#define CIF_IGNORE_IRQ		4	/* ignore interrupt (for udelay) */



#define _CIF_MCCK_PENDING	_BITUL(CIF_MCCK_PENDING)
@@ -34,7 +34,8 @@ 
#include <asm/ptrace.h>

#include <asm/setup.h>

#include <asm/runtime_instr.h>

#include <asm/fpu-internal.h>

#include <asm/fpu/types.h>

#include <asm/fpu/internal.h>



static inline void set_cpu_flag(int flag)

{

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