From 40cd0aae5957ec175b73dc17dce6079d33fa74f6 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Thu, 27 May 2021 15:28:46 -0700 Subject: [PATCH] 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 Signed-off-by: Borislav Petkov Link: https://lkml.kernel.org/r/20210527222846.931851-1-tony.luck@intel.com --- 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 b58b85380ddb5..0e3ae64d3b76b 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; -- 2.30.2