If we hit UE at an instruction with a fixup entry, flag to
ignore the event and set nip to continue execution at the
fixup entry.
For powernv these changes are already made by
commit 895e3dceeb97 ("powerpc/mce: Handle UE event for memcpy_mcsafe")
Reviewed-by: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com>
Reviewed-by: Santosh S <sant...@fossix.org>
Signed-off-by: Ganesh Goudar <ganes...@linux.ibm.com>
---
V2: Fixes a trivial checkpatch error in commit msg.
V3: Use proper subject prefix.
---
arch/powerpc/platforms/pseries/ras.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/ras.c
b/arch/powerpc/platforms/pseries/ras.c
index 43710b69e09e..58e2483fbb1a 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -10,6 +10,7 @@
#include <linux/fs.h>
#include <linux/reboot.h>
#include <linux/irq_work.h>
+#include <linux/extable.h>
#include <asm/machdep.h>
#include <asm/rtas.h>
@@ -505,6 +506,7 @@ static int mce_handle_error(struct pt_regs *regs, struct
rtas_error_log *errp)
int initiator = rtas_error_initiator(errp);
int severity = rtas_error_severity(errp);
u8 error_type, err_sub_type;
+ const struct exception_table_entry *entry;
if (initiator == RTAS_INITIATOR_UNKNOWN)
mce_err.initiator = MCE_INITIATOR_UNKNOWN;
@@ -558,6 +560,12 @@ static int mce_handle_error(struct pt_regs *regs, struct
rtas_error_log *errp)
switch (mce_log->error_type) {
case MC_ERROR_TYPE_UE:
mce_err.error_type = MCE_ERROR_TYPE_UE;
+ entry = search_kernel_exception_table(regs->nip);
+ if (entry) {
+ mce_err.ignore_event = true;
+ regs->nip = extable_fixup(entry);
+ disposition = RTAS_DISP_FULLY_RECOVERED;
+ }
switch (err_sub_type) {
case MC_ERROR_UE_IFETCH:
mce_err.u.ue_error_type = MCE_UE_ERROR_IFETCH;
--
2.17.2
