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| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2017-12-20 09:25:53 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-19 22:37:02 +1100 |
| commit | f442d004806e31fe5aab614ec48e53f7b38f7c2d (patch) | |
| tree | 6d4db2dcff2b070ef751bac009a17b2528bb922e /arch/powerpc/kernel/entry_64.S | |
| parent | f14e953b191fcb0da82ef066597df731b683a957 (diff) | |
| download | linux-f442d004806e31fe5aab614ec48e53f7b38f7c2d.tar.bz2 | |
powerpc/64s: Add support to mask perf interrupts and replay them
Two new bit mask field "IRQ_DISABLE_MASK_PMU" is introduced to support
the masking of PMI and "IRQ_DISABLE_MASK_ALL" to aid interrupt masking
checking.
Couple of new irq #defs "PACA_IRQ_PMI" and "SOFTEN_VALUE_0xf0*" added
to use in the exception code to check for PMI interrupts.
In the masked_interrupt handler, for PMIs we reset the MSR[EE] and
return. In the __check_irq_replay(), replay the PMI interrupt by
calling performance_monitor_common handler.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 7c51f022d0de..3b90a2f1018e 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -954,6 +954,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) addi r3,r1,STACK_FRAME_OVERHEAD; bl do_IRQ b ret_from_except +1: cmpwi cr0,r3,0xf00 + bne 1f + addi r3,r1,STACK_FRAME_OVERHEAD; + bl performance_monitor_exception + b ret_from_except 1: cmpwi cr0,r3,0xe60 bne 1f addi r3,r1,STACK_FRAME_OVERHEAD; |