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-rw-r--r--arch/ia64/kernel/mca.c8
-rw-r--r--arch/ia64/kernel/mca_drv.c33
-rw-r--r--include/asm-ia64/pal.h1
3 files changed, 36 insertions, 6 deletions
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index a76add3e76a2..491687f84fb5 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1192,8 +1192,6 @@ void
ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
struct ia64_sal_os_state *sos)
{
- pal_processor_state_info_t *psp = (pal_processor_state_info_t *)
- &sos->proc_state_param;
int recover, cpu = smp_processor_id();
struct task_struct *previous_current;
struct ia64_mca_notify_die nd =
@@ -1223,10 +1221,8 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
/* Get the MCA error record and log it */
ia64_mca_log_sal_error_record(SAL_INFO_TYPE_MCA);
- /* TLB error is only exist in this SAL error record */
- recover = (psp->tc && !(psp->cc || psp->bc || psp->rc || psp->uc))
- /* other error recovery */
- || (ia64_mca_ucmc_extension
+ /* MCA error recovery */
+ recover = (ia64_mca_ucmc_extension
&& ia64_mca_ucmc_extension(
IA64_LOG_CURR_BUFFER(SAL_INFO_TYPE_MCA),
sos));
diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
index afc1403799c9..5e2d18fbce40 100644
--- a/arch/ia64/kernel/mca_drv.c
+++ b/arch/ia64/kernel/mca_drv.c
@@ -607,6 +607,33 @@ recover_from_platform_error(slidx_table_t *slidx, peidx_table_t *peidx,
return status;
}
+/*
+ * recover_from_tlb_check
+ * @peidx: pointer of index of processor error section
+ *
+ * Return value:
+ * 1 on Success / 0 on Failure
+ */
+static int
+recover_from_tlb_check(peidx_table_t *peidx)
+{
+ sal_log_mod_error_info_t *smei;
+ pal_tlb_check_info_t *ptci;
+
+ smei = (sal_log_mod_error_info_t *)peidx_tlb_check(peidx, 0);
+ ptci = (pal_tlb_check_info_t *)&(smei->check_info);
+
+ /*
+ * Look for signature of a duplicate TLB DTC entry, which is
+ * a SW bug and always fatal.
+ */
+ if (ptci->op == PAL_TLB_CHECK_OP_PURGE
+ && !(ptci->itr || ptci->dtc || ptci->itc))
+ return fatal_mca("Duplicate TLB entry");
+
+ return mca_recovered("TLB check recovered");
+}
+
/**
* recover_from_processor_error
* @platform: whether there are some platform error section or not
@@ -652,6 +679,12 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
return fatal_mca("error not contained");
/*
+ * Look for recoverable TLB check
+ */
+ if (psp->tc && !(psp->cc || psp->bc || psp->rc || psp->uc))
+ return recover_from_tlb_check(peidx);
+
+ /*
* The cache check and bus check bits have four possible states
* cc bc
* 0 0 Weird record, not recovered
diff --git a/include/asm-ia64/pal.h b/include/asm-ia64/pal.h
index e43021a99a20..67656ce767c2 100644
--- a/include/asm-ia64/pal.h
+++ b/include/asm-ia64/pal.h
@@ -371,6 +371,7 @@ typedef u64 pal_mc_info_index_t;
* dependent
*/
+#define PAL_TLB_CHECK_OP_PURGE 8
typedef struct pal_process_state_info_s {
u64 reserved1 : 2,