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| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2015-07-31 21:24:38 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-08-06 15:10:18 +1000 |
| commit | e784b6499d9cba83b7f3f032b7ee01f7ca96ad91 (patch) | |
| tree | 763f91d5dceef667f79a4f3013a65a278df413b1 /arch/powerpc/include/asm/opal-api.h | |
| parent | 1852ae276ba6d5d481c3fb193054ebb67068be5c (diff) | |
| download | lwn-e784b6499d9cba83b7f3f032b7ee01f7ca96ad91.tar.gz lwn-e784b6499d9cba83b7f3f032b7ee01f7ca96ad91.zip | |
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/include/asm/opal-api.h')
| -rw-r--r-- | arch/powerpc/include/asm/opal-api.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index 4de3c69337cc..47d549ab2c18 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -154,7 +154,8 @@ #define OPAL_FLASH_WRITE 111 #define OPAL_FLASH_ERASE 112 #define OPAL_PRD_MSG 113 -#define OPAL_LAST 113 +#define OPAL_CEC_REBOOT2 116 +#define OPAL_LAST 116 /* Device tree flags */ @@ -857,6 +858,12 @@ enum OpalSysCooling { OPAL_SYSCOOL_INSF = 0x0001, /* System insufficient cooling */ }; +/* Argument to OPAL_CEC_REBOOT2() */ +enum { + OPAL_REBOOT_NORMAL = 0, + OPAL_REBOOT_PLATFORM_ERROR = 1, +}; + #endif /* __ASSEMBLY__ */ #endif /* __OPAL_API_H */ |