[tip:ras/core] x86/mce: Improve error message when kernel cannot recover, p2

[tip-bot for Tony Luck]

Commit-ID:  41f035a86b5b72a4f947c38e94239d20d595352a
Gitweb:     https://git.kernel.org/tip/41f035a86b5b72a4f947c38e94239d20d595352a
Author:     Tony Luck <tony.luck@xxxxxxxxx>
AuthorDate: Mon, 25 Feb 2019 12:59:40 -0800
Committer:  Borislav Petkov <bp@xxxxxxx>
CommitDate: Mon, 25 Feb 2019 23:21:35 +0100

x86/mce: Improve error message when kernel cannot recover, p2

In

  c7d606f560e4 ("x86/mce: Improve error message when kernel cannot recover")

a case was added for a machine check caused by a DATA access to poison
memory from the kernel. A case should have been added also for an
uncorrectable error during an instruction fetch in the kernel.

Add that extra case so the error message now reads:

  mce: [Hardware Error]: Machine check: Instruction fetch error in kernel

Fixes: c7d606f560e4 ("x86/mce: Improve error message when kernel cannot recover")
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Pu Wen <puwen@xxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: x86-ml <x86@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20190225205940.15226-1-tony.luck@xxxxxxxxx
---
 arch/x86/kernel/cpu/mce/severity.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kernel/cpu/mce/severity.c b/arch/x86/kernel/cpu/mce/severity.c
index dc3e26e905a3..65201e180fe0 100644
--- a/arch/x86/kernel/cpu/mce/severity.c
+++ b/arch/x86/kernel/cpu/mce/severity.c
@@ -165,6 +165,11 @@ static struct severity {
 		SER, MASK(MCI_STATUS_OVER|MCI_UC_SAR|MCI_ADDR|MCACOD, MCI_UC_SAR|MCI_ADDR|MCACOD_DATA),
 		KERNEL
 		),
+	MCESEV(
+		PANIC, "Instruction fetch error in kernel",
+		SER, MASK(MCI_STATUS_OVER|MCI_UC_SAR|MCI_ADDR|MCACOD, MCI_UC_SAR|MCI_ADDR|MCACOD_INSTR),
+		KERNEL
+		),
 #endif
 	MCESEV(
 		PANIC, "Action required: unknown MCACOD",