The following commit has been merged into the ras/core branch of tip: Commit-ID: 40cd0aae5957ec175b73dc17dce6079d33fa74f6 Gitweb: https://git.kernel.org/tip/40cd0aae5957ec175b73dc17dce6079d33fa74f6 Author: Tony Luck <tony.luck@xxxxxxxxx> AuthorDate: Thu, 27 May 2021 15:28:46 -07:00 Committer: Borislav Petkov <bp@xxxxxxx> CommitterDate: Fri, 28 May 2021 16:57:16 +02:00 x86/mce: Include a MCi_MISC value in faked mce logs 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@xxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Link: https://lkml.kernel.org/r/20210527222846.931851-1-tony.luck@xxxxxxxxx --- arch/x86/kernel/cpu/mce/apei.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/mce/apei.c b/arch/x86/kernel/cpu/mce/apei.c index b58b853..0e3ae64 100644 --- a/arch/x86/kernel/cpu/mce/apei.c +++ b/arch/x86/kernel/cpu/mce/apei.c @@ -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;
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