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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2013-07-01 17:38:47 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2013-07-08 20:53:01 +0200 |
| commit | c3d1fb567a634dcdff4c6f6095b2053260988336 (patch) | |
| tree | be2b0f39a3b489c4aa4b39d6c527be0c63146b92 /arch/x86/include | |
| parent | Linux 3.10 (diff) | |
| download | linux-c3d1fb567a634dcdff4c6f6095b2053260988336.tar.xz linux-c3d1fb567a634dcdff4c6f6095b2053260988336.zip | |
mce: acpi/apei: Honour Firmware First for MCA banks listed in APEI HEST CMC
The Corrected Machine Check structure (CMC) in HEST has a flag which can be
set by the firmware to indicate to the OS that it prefers to process the
corrected error events first. In this scenario, the OS is expected to not
monitor for corrected errors (through CMCI/polling). Instead, the firmware
notifies the OS on corrected error events through GHES.
Linux already has support for GHES. This patch adds support for parsing CMC
structure and to disable CMCI/polling if the firmware first flag is set.
Further, the list of machine check bank structures at the end of CMC is used
to determine which MCA banks function in FF mode, so that we continue to
monitor error events on the other banks.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/mce.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index fa5f71e021d5..9c91683ab5e6 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -188,6 +188,9 @@ extern void register_mce_write_callback(ssize_t (*)(struct file *filp, const char __user *ubuf, size_t usize, loff_t *off)); +/* Disable CMCI/polling for MCA bank claimed by firmware */ +extern void mce_disable_bank(int bank); + /* * Exception handler */ |