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| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2015-07-31 18:54:38 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-08-06 08:10:18 +0300 |
| commit | e784b6499d9cba83b7f3f032b7ee01f7ca96ad91 (patch) | |
| tree | 763f91d5dceef667f79a4f3013a65a278df413b1 /arch/powerpc/platforms/powernv/opal-wrappers.S | |
| parent | 1852ae276ba6d5d481c3fb193054ebb67068be5c (diff) | |
| download | linux-e784b6499d9cba83b7f3f032b7ee01f7ca96ad91.tar.xz | |
powerpc/powernv: Invoke opal_cec_reboot2() on unrecoverable machine check errors.
On non-recoverable MCE errors in kernel space, Linux kernel panics
and system reboots. On BMC based system opal-prd runs as a daemon
in the host. Hence, kernel crash may prevent opal-prd to detect and
analyze this MCE error. This may land us in a situation where the faulty
memory never gets de-configured and Linux would keep hitting same MCE error
again and again. If this happens in early stage of kernel initialization,
then Linux will keep crashing and rebooting in a loop.
This patch fixes this issue by invoking new opal_cec_reboot2() call with
reboot type OPAL_REBOOT_PLATFORM_ERROR to inform BMC/OCC about this
error, so that BMC can collect relevant data for error analysis and
decide what component to de-configure before rebooting.
This patch is dependent on OPAL patchset posted on skiboot mailing list
at https://lists.ozlabs.org/pipermail/skiboot/2015-July/001771.html that
introduces opal_cec_reboot2() opal call.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal-wrappers.S')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-wrappers.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index 88e433357371..6224176dab59 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -202,6 +202,7 @@ OPAL_CALL(opal_rtc_read, OPAL_RTC_READ); OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE); OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN); OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT); +OPAL_CALL(opal_cec_reboot2, OPAL_CEC_REBOOT2); OPAL_CALL(opal_read_nvram, OPAL_READ_NVRAM); OPAL_CALL(opal_write_nvram, OPAL_WRITE_NVRAM); OPAL_CALL(opal_handle_interrupt, OPAL_HANDLE_INTERRUPT); |