diff options
| author | Michael Neuling <mikey@neuling.org> | 2013-02-13 16:21:34 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-02-15 16:58:51 +1100 |
| commit | afc07701ced6463786d09a3b9baf894c1397e991 (patch) | |
| tree | 5f6cccb458938a3d446982ab0e51655957c1fd53 /arch/powerpc | |
| parent | 97a0aac9b844a8bcfebb6805322998f8ca4db9dc (diff) | |
powerpc: Add transactional memory paca scratch register to show_regs
Add transactional memory paca scratch register to show_regs. This is useful
for debugging.
Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/paca.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/process.c | 3 |
4 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 4b74c6c9d82..77c91e74b61 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -137,6 +137,9 @@ struct paca_struct { u8 irq_work_pending; /* IRQ_WORK interrupt while soft-disable */ u8 nap_state_lost; /* NV GPR values lost in power7_idle */ u64 sprg3; /* Saved user-visible sprg */ +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + u64 tm_scratch; /* TM scratch area for reclaim */ +#endif #ifdef CONFIG_PPC_POWERNV /* Pointer to OPAL machine check event structure set by the diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 0fdc97496d7..78119036729 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -126,6 +126,7 @@ int main(void) DEFINE(THREAD_TAR, offsetof(struct thread_struct, tar)); #endif #ifdef CONFIG_PPC_TRANSACTIONAL_MEM + DEFINE(PACATMSCRATCH, offsetof(struct paca_struct, tm_scratch)); DEFINE(THREAD_TM_TFHAR, offsetof(struct thread_struct, tm_tfhar)); DEFINE(THREAD_TM_TEXASR, offsetof(struct thread_struct, tm_texasr)); DEFINE(THREAD_TM_TFIAR, offsetof(struct thread_struct, tm_tfiar)); diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 9ae8451bbc8..612ea130c5d 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -785,6 +785,10 @@ fast_exception_return: andc r4,r4,r0 /* r0 contains MSR_RI here */ mtmsrd r4,1 +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + /* TM debug */ + std r3, PACATMSCRATCH(r13) /* Stash returned-to MSR */ +#endif /* * r13 is our per cpu area, only restore it if we are returning to * userspace the value stored in the stack frame may belong to diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index b0a0321e4bb..1cc40533021 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -754,6 +754,9 @@ void show_regs(struct pt_regs * regs) printk("NIP ["REG"] %pS\n", regs->nip, (void *)regs->nip); printk("LR ["REG"] %pS\n", regs->link, (void *)regs->link); #endif +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + printk("PACATMSCRATCH [%llx]\n", get_paca()->tm_scratch); +#endif show_stack(current, (unsigned long *) regs->gpr[1]); if (!user_mode(regs)) show_instructions(regs); |