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powerpc/64: Replace CURRENT_THREAD_INFO with PACA_THREAD_INFO 

Now that current_thread_info is located at the beginning of 'current'
task struct, CURRENT_THREAD_INFO macro is not really needed any more.

This patch replaces it by loads of the value at PACA_THREAD_INFO(r13).

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Add PACA_THREAD_INFO rather than using PACACURRENT]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.1
Christophe Leroy 2019-01-12 09:55:50 +00:00 committed by Michael Ellerman
parent f7354ccac8
commit c911d2e128
9 changed files with 16 additions and 18 deletions
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4
arch/powerpc/include/asm/exception-64s.h
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@ -671,7 +671,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
#define RUNLATCH_ON \
BEGIN_FTR_SECTION \
CURRENT_THREAD_INFO(r3, r1); \
ld r3, PACA_THREAD_INFO(r13); \
ld r4,TI_LOCAL_FLAGS(r3); \
andi. r0,r4,_TLF_RUNLATCH; \
beql ppc64_runlatch_on_trampoline; \
@ -721,7 +721,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
#ifdef CONFIG_PPC_970_NAP
#define FINISH_NAP \
BEGIN_FTR_SECTION \
CURRENT_THREAD_INFO(r11, r1); \
ld r11, PACA_THREAD_INFO(r13); \
ld r9,TI_LOCAL_FLAGS(r11); \
andi. r10,r9,_TLF_NAPPING; \
bnel power4_fixup_nap; \

4
arch/powerpc/include/asm/thread_info.h
View File

@ -17,10 +17,6 @@
#define THREAD_SIZE (1 << THREAD_SHIFT)
#ifdef CONFIG_PPC64
#define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(ld dest, PACACURRENT(r13))
#endif
#ifndef __ASSEMBLY__
#include <linux/cache.h>
#include <asm/processor.h>

2
arch/powerpc/kernel/asm-offsets.c
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@ -182,6 +182,8 @@ int main(void)
OFFSET(PACAPROCSTART, paca_struct, cpu_start);
OFFSET(PACAKSAVE, paca_struct, kstack);
OFFSET(PACACURRENT, paca_struct, __current);
DEFINE(PACA_THREAD_INFO, offsetof(struct paca_struct, __current) +
offsetof(struct task_struct, thread_info));
OFFSET(PACASAVEDMSR, paca_struct, saved_msr);
OFFSET(PACAR1, paca_struct, saved_r1);
OFFSET(PACATOC, paca_struct, kernel_toc);

10
arch/powerpc/kernel/entry_64.S
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@ -166,7 +166,7 @@ system_call: /* label this so stack traces look sane */
li r10,IRQS_ENABLED
std r10,SOFTE(r1)
CURRENT_THREAD_INFO(r11, r1)
ld r11, PACA_THREAD_INFO(r13)
ld r10,TI_FLAGS(r11)
andi. r11,r10,_TIF_SYSCALL_DOTRACE
bne .Lsyscall_dotrace /* does not return */
@ -213,7 +213,7 @@ system_call: /* label this so stack traces look sane */
ld r3,RESULT(r1)
#endif
CURRENT_THREAD_INFO(r12, r1)
ld r12, PACA_THREAD_INFO(r13)
ld r8,_MSR(r1)
#ifdef CONFIG_PPC_BOOK3S
@ -346,7 +346,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
/* Repopulate r9 and r10 for the syscall path */
addi r9,r1,STACK_FRAME_OVERHEAD
CURRENT_THREAD_INFO(r10, r1)
ld r10, PACA_THREAD_INFO(r13)
ld r10,TI_FLAGS(r10)
cmpldi r0,NR_syscalls
@ -740,7 +740,7 @@ _GLOBAL(ret_from_except_lite)
mtmsrd r10,1 /* Update machine state */
#endif /* CONFIG_PPC_BOOK3E */
CURRENT_THREAD_INFO(r9, r1)
ld r9, PACA_THREAD_INFO(r13)
ld r3,_MSR(r1)
#ifdef CONFIG_PPC_BOOK3E
ld r10,PACACURRENT(r13)
@ -854,7 +854,7 @@ resume_kernel:
1: bl preempt_schedule_irq
/* Re-test flags and eventually loop */
CURRENT_THREAD_INFO(r9, r1)
ld r9, PACA_THREAD_INFO(r13)
ld r4,TI_FLAGS(r9)
andi. r0,r4,_TIF_NEED_RESCHED
bne 1b

2
arch/powerpc/kernel/exceptions-64e.S
View File

@ -493,7 +493,7 @@ exc_##n##_bad_stack: \
* interrupts happen before the wait instruction.
*/
#define CHECK_NAPPING() \
CURRENT_THREAD_INFO(r11, r1); \
ld r11, PACA_THREAD_INFO(r13); \
ld r10,TI_LOCAL_FLAGS(r11); \
andi. r9,r10,_TLF_NAPPING; \
beq+ 1f; \

2
arch/powerpc/kernel/exceptions-64s.S
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@ -1629,7 +1629,7 @@ do_hash_page:
ori r0,r0,DSISR_BAD_FAULT_64S@l
and. r0,r4,r0 /* weird error? */
bne- handle_page_fault /* if not, try to insert a HPTE */
CURRENT_THREAD_INFO(r11, r1)
ld r11, PACA_THREAD_INFO(r13)
lwz r0,TI_PREEMPT(r11) /* If we're in an "NMI" */
andis. r0,r0,NMI_MASK@h /* (i.e. an irq when soft-disabled) */
bne 77f /* then don't call hash_page now */

2
arch/powerpc/kernel/idle_book3e.S
View File

@ -63,7 +63,7 @@ _GLOBAL(\name)
1: /* Let's set the _TLF_NAPPING flag so interrupts make us return
* to the right spot
*/
CURRENT_THREAD_INFO(r11, r1)
ld r11, PACACURRENT(r13)
ld r10,TI_LOCAL_FLAGS(r11)
ori r10,r10,_TLF_NAPPING
std r10,TI_LOCAL_FLAGS(r11)

2
arch/powerpc/kernel/idle_power4.S
View File

@ -68,7 +68,7 @@ BEGIN_FTR_SECTION
DSSALL
sync
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
CURRENT_THREAD_INFO(r9, r1)
ld r9, PACA_THREAD_INFO(r13)
ld r8,TI_LOCAL_FLAGS(r9) /* set napping bit */
ori r8,r8,_TLF_NAPPING /* so when we take an exception */
std r8,TI_LOCAL_FLAGS(r9) /* it will return to our caller */

6
arch/powerpc/kernel/trace/ftrace_64_mprofile.S
View File

@ -229,7 +229,7 @@ ftrace_call:
* - r0, r11 & r12 are free
*/
livepatch_handler:
CURRENT_THREAD_INFO(r12, r1)
ld r12, PACA_THREAD_INFO(r13)
/* Allocate 3 x 8 bytes */
ld r11, TI_livepatch_sp(r12)
@ -256,7 +256,7 @@ livepatch_handler:
* restore it.
*/
CURRENT_THREAD_INFO(r12, r1)
ld r12, PACA_THREAD_INFO(r13)
ld r11, TI_livepatch_sp(r12)
@ -273,7 +273,7 @@ livepatch_handler:
ld r2, -24(r11)
/* Pop livepatch stack frame */
CURRENT_THREAD_INFO(r12, r1)
ld r12, PACA_THREAD_INFO(r13)
subi r11, r11, 24
std r11, TI_livepatch_sp(r12)