Commit 5e8010cb authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

s390: replace TIF_SIE with PF_VCPU 



Replace the check for TIF_SIE in the fault handler by a check for PF_VCPU.
With the last user of TIF_SIE gone we can now remove the bit.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 161beff8

arch/s390/include/asm/thread_info.h

+0 −2
Original line number Diff line number Diff line
@@ -95,7 +95,6 @@ static inline struct thread_info *current_thread_info(void) 
#define TIF_SYSCALL_AUDIT	9	/* syscall auditing active */

#define TIF_SECCOMP		10	/* secure computing */

#define TIF_SYSCALL_TRACEPOINT	11	/* syscall tracepoint instrumentation */

#define TIF_SIE			12	/* guest execution active */

#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling

					   TIF_NEED_RESCHED */

#define TIF_31BIT		17	/* 32bit process */
@@ -114,7 +113,6 @@ static inline struct thread_info *current_thread_info(void) 
#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)

#define _TIF_SECCOMP		(1<<TIF_SECCOMP)

#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)

#define _TIF_SIE		(1<<TIF_SIE)

#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)

#define _TIF_31BIT		(1<<TIF_31BIT)

#define _TIF_SINGLE_STEP	(1<<TIF_SINGLE_STEP)

arch/s390/kernel/entry64.S

+0 −3
Original line number Diff line number Diff line
@@ -968,7 +968,6 @@ ENTRY(sie64a) 
	xc	__SF_EMPTY+16(8,%r15),__SF_EMPTY+16(%r15) # host id == 0

	lmg	%r0,%r13,0(%r3)			# load guest gprs 0-13

	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct

	oi	__TI_flags+6(%r14),_TIF_SIE>>8

sie_loop:

	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct

	tm	__TI_flags+7(%r14),_TIF_EXIT_SIE
@@ -986,7 +985,6 @@ sie_done: 
	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct

sie_exit:

	lctlg	%c1,%c1,__LC_USER_ASCE		# load primary asce

	ni	__TI_flags+6(%r14),255-(_TIF_SIE>>8)

	lg	%r14,__SF_EMPTY+8(%r15)		# load guest register save area

	stmg	%r0,%r13,0(%r14)		# save guest gprs 0-13

	lmg	%r6,%r14,__SF_GPRS(%r15)	# restore kernel registers
@@ -995,7 +993,6 @@ sie_exit: 
sie_fault:

	lctlg	%c1,%c1,__LC_USER_ASCE		# load primary asce

	lg	%r14,__LC_THREAD_INFO		# pointer thread_info struct

	ni	__TI_flags+6(%r14),255-(_TIF_SIE>>8)

	lg	%r14,__SF_EMPTY+8(%r15)		# load guest register save area

	stmg	%r0,%r13,0(%r14)		# save guest gprs 0-13

	lmg	%r6,%r14,__SF_GPRS(%r15)	# restore kernel registers

arch/s390/mm/fault.c

+1 −1
Original line number Diff line number Diff line
@@ -294,7 +294,7 @@ static inline int do_exception(struct pt_regs *regs, int access) 
	down_read(&mm->mmap_sem);



#ifdef CONFIG_PGSTE

	if (test_tsk_thread_flag(current, TIF_SIE) && S390_lowcore.gmap) {

	if ((current->flags & PF_VCPU) && S390_lowcore.gmap) {

		address = __gmap_fault(address,

				     (struct gmap *) S390_lowcore.gmap);

		if (address == -EFAULT) {