linux-kernel - [PATCH 16/19] ACPI, APEI, GHES: Add hardware memory error recovery support

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Message-id: <70738ef3836dfd4dbdaffef5522f4584b601770d.1312323131.git.len.brown@intel.com>
Date:	Tue, 02 Aug 2011 18:14:49 -0400
From:	Len Brown <lenb@...nel.org>
To:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Cc:	Huang Ying <ying.huang@...el.com>, Len Brown <len.brown@...el.com>
Subject: [PATCH 16/19] ACPI, APEI, GHES: Add hardware memory error recovery
 support

From: Huang Ying <ying.huang@...el.com>

memory_failure_queue() is called when recoverable memory errors are
notified by firmware to do the recovery work.

Signed-off-by: Huang Ying <ying.huang@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
 drivers/acpi/apei/Kconfig |    7 +++++++
 drivers/acpi/apei/ghes.c  |   24 +++++++++++++++++-------
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index 35596ea..c34aa51 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -32,6 +32,13 @@ config ACPI_APEI_PCIEAER
 	  PCIe AER errors may be reported via APEI firmware first mode.
 	  Turn on this option to enable the corresponding support.
 
+config ACPI_APEI_MEMORY_FAILURE
+	bool "APEI memory error recovering support"
+	depends on ACPI_APEI && MEMORY_FAILURE
+	help
+	  Memory errors may be reported via APEI firmware first mode.
+	  Turn on this option to enable the memory recovering support.
+
 config ACPI_APEI_EINJ
 	tristate "APEI Error INJection (EINJ)"
 	depends on ACPI_APEI && DEBUG_FS
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 931410d..e92c47c 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -451,20 +451,30 @@ static void ghes_clear_estatus(struct ghes *ghes)
 
 static void ghes_do_proc(const struct acpi_hest_generic_status *estatus)
 {
-	int sev, processed = 0;
+	int sev, sec_sev;
 	struct acpi_hest_generic_data *gdata;
 
 	sev = ghes_severity(estatus->error_severity);
 	apei_estatus_for_each_section(estatus, gdata) {
-#ifdef CONFIG_X86_MCE
+		sec_sev = ghes_severity(gdata->error_severity);
 		if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
 				 CPER_SEC_PLATFORM_MEM)) {
-			apei_mce_report_mem_error(
-				sev == GHES_SEV_CORRECTED,
-				(struct cper_sec_mem_err *)(gdata+1));
-			processed = 1;
-		}
+			struct cper_sec_mem_err *mem_err;
+			mem_err = (struct cper_sec_mem_err *)(gdata+1);
+#ifdef CONFIG_X86_MCE
+			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
+		}
 	}
 }
 
-- 
1.7.6.396.ge0613

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