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powerpc: Export tm_enable()/tm_disable/tm_abort() APIs

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This patch exports tm_enable()/tm_disable/tm_abort() APIs, which
will be used for PR KVM transactional memory logic.

Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Reviewed-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Simon Guo 2018-05-23 15:01:46 +08:00 committed by Michael Ellerman
parent ab3759b573
commit eacbb218fb
4 changed files with 16 additions and 2 deletions
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3
arch/powerpc/include/asm/asm-prototypes.h
View File

@ -141,4 +141,7 @@ unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip);
void pnv_power9_force_smt4_catch(void);
void pnv_power9_force_smt4_release(void);
void tm_enable(void);
void tm_disable(void);
void tm_abort(uint8_t cause);
#endif /* _ASM_POWERPC_ASM_PROTOTYPES_H */

2
arch/powerpc/include/asm/tm.h
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@ -10,12 +10,10 @@
#ifndef __ASSEMBLY__
extern void tm_enable(void);
extern void tm_reclaim(struct thread_struct *thread,
uint8_t cause);
extern void tm_reclaim_current(uint8_t cause);
extern void tm_recheckpoint(struct thread_struct *thread);
extern void tm_abort(uint8_t cause);
extern void tm_save_sprs(struct thread_struct *thread);
extern void tm_restore_sprs(struct thread_struct *thread);

12
arch/powerpc/kernel/tm.S
View File

@ -12,6 +12,7 @@
#include <asm/ptrace.h>
#include <asm/reg.h>
#include <asm/bug.h>
#include <asm/export.h>
#ifdef CONFIG_VSX
/* See fpu.S, this is borrowed from there */
@ -55,6 +56,16 @@ _GLOBAL(tm_enable)
or r4, r4, r3
mtmsrd r4
1: blr
EXPORT_SYMBOL_GPL(tm_enable);
_GLOBAL(tm_disable)
mfmsr r4
li r3, MSR_TM >> 32
sldi r3, r3, 32
andc r4, r4, r3
mtmsrd r4
blr
EXPORT_SYMBOL_GPL(tm_disable);
_GLOBAL(tm_save_sprs)
mfspr r0, SPRN_TFHAR
@ -78,6 +89,7 @@ _GLOBAL(tm_restore_sprs)
_GLOBAL(tm_abort)
TABORT(R3)
blr
EXPORT_SYMBOL_GPL(tm_abort);
/* void tm_reclaim(struct thread_struct *thread,
* uint8_t cause)

1
arch/powerpc/mm/hash_utils_64.c
View File

@ -64,6 +64,7 @@
#include <asm/trace.h>
#include <asm/ps3.h>
#include <asm/pte-walk.h>
#include <asm/asm-prototypes.h>
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)