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x86/mce: Include a MCi_MISC value in faked mce logs

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When BIOS reports memory errors to Linux using the ACPI/APEI
error reporting method Linux creates a "struct mce" to pass
to the normal reporting code path.

The constructed record doesn't include a value for the "misc"
field of the structure, and so mce_usable_address() says this
record doesn't include a valid address.

Net result is that functions like uc_decode_notifier() will
just ignore this record instead of taking action to offline
a page.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210527222846.931851-1-tony.luck@intel.com
This commit is contained in:
Tony Luck 2021-05-27 15:28:46 -07:00 committed by Borislav Petkov
parent 94a311ce24
commit 40cd0aae59
1 changed files with 2 additions and 1 deletions
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3
arch/x86/kernel/cpu/mce/apei.c
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@ -36,7 +36,8 @@ void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err)
mce_setup(&m);
m.bank = -1;
/* Fake a memory read error with unknown channel */
m.status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_ADDRV | 0x9f;
m.status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_ADDRV | MCI_STATUS_MISCV | 0x9f;
m.misc = (MCI_MISC_ADDR_PHYS << 6) | PAGE_SHIFT;
if (severity >= GHES_SEV_RECOVERABLE)
m.status |= MCI_STATUS_UC;