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powerpc: Hook in new transactional memory code

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This hooks the new transactional memory code into context switching, FP/VMX/VMX
unavailable and exception return.

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>
This commit is contained in:
Michael Neuling
2013-02-13 16:21:40 +00:00
committed by Benjamin Herrenschmidt
parent f54db641b9
commit bc2a9408fa
4 changed files with 115 additions and 4 deletions
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15
arch/powerpc/kernel/process.c
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@@ -515,7 +515,7 @@ out_and_saveregs:
tm_save_sprs(thr);
}
static inline void __maybe_unused tm_recheckpoint_new_task(struct task_struct *new)
static inline void tm_recheckpoint_new_task(struct task_struct *new)
{
unsigned long msr;
@@ -590,6 +590,8 @@ struct task_struct *__switch_to(struct task_struct *prev,
struct ppc64_tlb_batch *batch;
#endif
__switch_to_tm(prev);
#ifdef CONFIG_SMP
/* avoid complexity of lazy save/restore of fpu
* by just saving it every time we switch out if
@@ -705,6 +707,9 @@ struct task_struct *__switch_to(struct task_struct *prev,
* of sync. Hard disable here.
*/
hard_irq_disable();
tm_recheckpoint_new_task(new);
last = _switch(old_thread, new_thread);
#ifdef CONFIG_PPC_BOOK3S_64
@@ -1080,7 +1085,6 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
regs->msr = MSR_USER32;
}
#endif
discard_lazy_cpu_state();
#ifdef CONFIG_VSX
current->thread.used_vsr = 0;
@@ -1100,6 +1104,13 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
current->thread.spefscr = 0;
current->thread.used_spe = 0;
#endif /* CONFIG_SPE */
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
if (cpu_has_feature(CPU_FTR_TM))
regs->msr |= MSR_TM;
current->thread.tm_tfhar = 0;
current->thread.tm_texasr = 0;
current->thread.tm_tfiar = 0;
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
}
#define PR_FP_ALL_EXCEPT (PR_FP_EXC_DIV | PR_FP_EXC_OVF | PR_FP_EXC_UND \