mce: acpi/apei: Soft-offline a page on firmware GHES notification

If the firmware indicates in GHES error data entry that the error threshold
has exceeded for a corrected error event, then we try to soft-offline the
page. This could be called in interrupt context, so we queue this up similar
to how we handle memory failure scenarios.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index fcd7d91..a8f362a 100644 (file)
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -409,6 +409,34 @@ static void ghes_clear_estatus(struct ghes *ghes)
        ghes->flags &= ~GHES_TO_CLEAR;
 }
 
+static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int sev)
+{
+#ifdef CONFIG_ACPI_APEI_MEMORY_FAILURE
+       unsigned long pfn;
+       int sec_sev = ghes_severity(gdata->error_severity);
+       struct cper_sec_mem_err *mem_err;
+       mem_err = (struct cper_sec_mem_err *)(gdata + 1);
+
+       if (sec_sev == GHES_SEV_CORRECTED &&
+           (gdata->flags & CPER_SEC_ERROR_THRESHOLD_EXCEEDED) &&
+           (mem_err->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS)) {
+               pfn = mem_err->physical_addr >> PAGE_SHIFT;
+               if (pfn_valid(pfn))
+                       memory_failure_queue(pfn, 0, MF_SOFT_OFFLINE);
+               else if (printk_ratelimit())
+                       pr_warn(FW_WARN GHES_PFX
+                       "Invalid address in generic error data: %#llx\n",
+                       mem_err->physical_addr);
+       }
+       if (sev == GHES_SEV_RECOVERABLE &&
+           sec_sev == GHES_SEV_RECOVERABLE &&
+           mem_err->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS) {
+               pfn = mem_err->physical_addr >> PAGE_SHIFT;
+               memory_failure_queue(pfn, 0, 0);
+       }
+#endif
+}
+
 static void ghes_do_proc(struct ghes *ghes,
                         const struct acpi_hest_generic_status *estatus)
 {
@@ -428,15 +456,7 @@ static void ghes_do_proc(struct ghes *ghes,
                        apei_mce_report_mem_error(sev == GHES_SEV_CORRECTED,
                                                  mem_err);
 #endif
-#ifdef CONFIG_ACPI_APEI_MEMORY_FAILURE
-                       if (sev == GHES_SEV_RECOVERABLE &&
-                           sec_sev == GHES_SEV_RECOVERABLE &&
-                           mem_err->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS) {
-                               unsigned long pfn;
-                               pfn = mem_err->physical_addr >> PAGE_SHIFT;
-                               memory_failure_queue(pfn, 0, 0);
-                       }
-#endif
+                       ghes_handle_memory_failure(gdata, sev);
                }
 #ifdef CONFIG_ACPI_APEI_PCIEAER
                else if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,

diff --git a/include/linux/mm.h b/include/linux/mm.h
index e0c8528..958e9ef 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1784,6 +1784,7 @@ enum mf_flags {
        MF_COUNT_INCREASED = 1 << 0,
        MF_ACTION_REQUIRED = 1 << 1,
        MF_MUST_KILL = 1 << 2,
+       MF_SOFT_OFFLINE = 1 << 3,
 };
 extern int memory_failure(unsigned long pfn, int trapno, int flags);
 extern void memory_failure_queue(unsigned long pfn, int trapno, int flags);

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index ceb0c7f..0d6717e 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1286,7 +1286,10 @@ static void memory_failure_work_func(struct work_struct *work)
                spin_unlock_irqrestore(&mf_cpu->lock, proc_flags);
                if (!gotten)
                        break;
-               memory_failure(entry.pfn, entry.trapno, entry.flags);
+               if (entry.flags & MF_SOFT_OFFLINE)
+                       soft_offline_page(pfn_to_page(entry.pfn), entry.flags);
+               else
+                       memory_failure(entry.pfn, entry.trapno, entry.flags);
        }
 }