Hookup instruction errors (UE) for memory offling via memory_failure()
in a manner similar to load/store errors (derror). Since we have access
to the NIP, the conversion is a one step process in this case.
Signed-off-by: Balbir Singh <bsinghar...@gmail.com>
---
arch/powerpc/kernel/mce_power.c | 23 ++++++++++++++++++++---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c
index 66b0a5d..31ec893 100644
--- a/arch/powerpc/kernel/mce_power.c
+++ b/arch/powerpc/kernel/mce_power.c
@@ -488,7 +488,8 @@ static int mce_find_instr_ea_and_pfn(struct pt_regs *regs,
uint64_t *addr,
static int mce_handle_ierror(struct pt_regs *regs,
const struct mce_ierror_table table[],
- struct mce_error_info *mce_err, uint64_t *addr)
+ struct mce_error_info *mce_err, uint64_t *addr,
+ uint64_t *phys_addr)
{
uint64_t srr1 = regs->msr;
int handled = 0;
@@ -540,8 +541,23 @@ static int mce_handle_ierror(struct pt_regs *regs,
}
mce_err->severity = table[i].severity;
mce_err->initiator = table[i].initiator;
- if (table[i].nip_valid)
+ if (table[i].nip_valid) {
*addr = regs->nip;
+ if (mce_err->severity == MCE_SEV_ERROR_SYNC &&
+ table[i].error_type == MCE_ERROR_TYPE_UE) {
+ unsigned long pfn;
+ struct mm_struct *mm;
+
+ if (user_mode(regs))
+ mm = current->mm;
+ else
+ mm = &init_mm;
+
+ pfn = addr_to_pfn(mm, regs->nip);
+ if (pfn != ULONG_MAX)
+ *phys_addr = pfn;
+ }
+ }
return handled;
}
@@ -675,7 +691,8 @@ static long mce_handle_error(struct pt_regs *regs,
handled = mce_handle_derror(regs, dtable, &mce_err, &addr,
&phys_addr);
else
- handled = mce_handle_ierror(regs, itable, &mce_err, &addr);
+ handled = mce_handle_ierror(regs, itable, &mce_err, &addr,
+ &phys_addr);
if (!handled && mce_err.error_type == MCE_ERROR_TYPE_UE)
handled = mce_handle_ue_error(regs);
--
2.9.5
