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| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2013-10-30 15:35:49 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-12-05 06:05:21 +0100 |
| commit | b5ff4211a8294be2ddbaf963fa3666fa042292a8 (patch) | |
| tree | c87b212ebfddc4c42c54c61ee1b3fb3d49e0c941 /arch/powerpc/kernel/exceptions-64s.S | |
| parent | powerpc/book3s: Decode and save machine check event. (diff) | |
| download | linux-b5ff4211a8294be2ddbaf963fa3666fa042292a8.tar.xz linux-b5ff4211a8294be2ddbaf963fa3666fa042292a8.zip | |
powerpc/book3s: Queue up and process delayed MCE events.
When machine check real mode handler can not continue into host kernel
in V mode, it returns from the interrupt and we loose MCE event which
never gets logged. In such a situation queue up the MCE event so that
we can log it later when we get back into host kernel with r1 pointing to
kernel stack e.g. during syscall exit.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 1aec3025eeee..862b9dd4a9db 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -855,7 +855,8 @@ BEGIN_FTR_SECTION /* Supervisor state loss */ li r0,1 stb r0,PACA_NAPSTATELOST(r13) -3: MACHINE_CHECK_HANDLER_WINDUP +3: bl .machine_check_queue_event + MACHINE_CHECK_HANDLER_WINDUP GET_PACA(r13) ld r1,PACAR1(r13) b .power7_enter_nap_mode @@ -895,8 +896,10 @@ BEGIN_FTR_SECTION 2: /* * Return from MC interrupt. - * TODO: Queue up the MCE event so that we can log it later. + * Queue up the MCE event so that we can log it later, while + * returning from kernel or opal call. */ + bl .machine_check_queue_event MACHINE_CHECK_HANDLER_WINDUP rfid 9: |