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-rw-r--r--drivers/acpi/apei/Makefile2
-rw-r--r--drivers/acpi/apei/hest.c173
-rw-r--r--include/acpi/apei.h13
3 files changed, 187 insertions, 1 deletions
diff --git a/drivers/acpi/apei/Makefile b/drivers/acpi/apei/Makefile
index 6f41dfca456..a8832929835 100644
--- a/drivers/acpi/apei/Makefile
+++ b/drivers/acpi/apei/Makefile
@@ -1,3 +1,3 @@
obj-$(CONFIG_ACPI_APEI) += apei.o
-apei-y := apei-base.o
+apei-y := apei-base.o hest.o
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
new file mode 100644
index 00000000000..e7f40d362cb
--- /dev/null
+++ b/drivers/acpi/apei/hest.c
@@ -0,0 +1,173 @@
+/*
+ * APEI Hardware Error Souce Table support
+ *
+ * HEST describes error sources in detail; communicates operational
+ * parameters (i.e. severity levels, masking bits, and threshold
+ * values) to Linux as necessary. It also allows the BIOS to report
+ * non-standard error sources to Linux (for example, chipset-specific
+ * error registers).
+ *
+ * For more information about HEST, please refer to ACPI Specification
+ * version 4.0, section 17.3.2.
+ *
+ * Copyright 2009 Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/kdebug.h>
+#include <linux/highmem.h>
+#include <linux/io.h>
+#include <acpi/apei.h>
+
+#include "apei-internal.h"
+
+#define HEST_PFX "HEST: "
+
+int hest_disable;
+EXPORT_SYMBOL_GPL(hest_disable);
+
+/* HEST table parsing */
+
+static struct acpi_table_hest *hest_tab;
+
+static int hest_void_parse(struct acpi_hest_header *hest_hdr, void *data)
+{
+ return 0;
+}
+
+static int hest_esrc_len_tab[ACPI_HEST_TYPE_RESERVED] = {
+ [ACPI_HEST_TYPE_IA32_CHECK] = -1, /* need further calculation */
+ [ACPI_HEST_TYPE_IA32_CORRECTED_CHECK] = -1,
+ [ACPI_HEST_TYPE_IA32_NMI] = sizeof(struct acpi_hest_ia_nmi),
+ [ACPI_HEST_TYPE_AER_ROOT_PORT] = sizeof(struct acpi_hest_aer_root),
+ [ACPI_HEST_TYPE_AER_ENDPOINT] = sizeof(struct acpi_hest_aer),
+ [ACPI_HEST_TYPE_AER_BRIDGE] = sizeof(struct acpi_hest_aer_bridge),
+ [ACPI_HEST_TYPE_GENERIC_ERROR] = sizeof(struct acpi_hest_generic),
+};
+
+static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
+{
+ u16 hest_type = hest_hdr->type;
+ int len;
+
+ if (hest_type >= ACPI_HEST_TYPE_RESERVED)
+ return 0;
+
+ len = hest_esrc_len_tab[hest_type];
+
+ if (hest_type == ACPI_HEST_TYPE_IA32_CORRECTED_CHECK) {
+ struct acpi_hest_ia_corrected *cmc;
+ cmc = (struct acpi_hest_ia_corrected *)hest_hdr;
+ len = sizeof(*cmc) + cmc->num_hardware_banks *
+ sizeof(struct acpi_hest_ia_error_bank);
+ } else if (hest_type == ACPI_HEST_TYPE_IA32_CHECK) {
+ struct acpi_hest_ia_machine_check *mc;
+ mc = (struct acpi_hest_ia_machine_check *)hest_hdr;
+ len = sizeof(*mc) + mc->num_hardware_banks *
+ sizeof(struct acpi_hest_ia_error_bank);
+ }
+ BUG_ON(len == -1);
+
+ return len;
+};
+
+int apei_hest_parse(apei_hest_func_t func, void *data)
+{
+ struct acpi_hest_header *hest_hdr;
+ int i, rc, len;
+
+ if (hest_disable)
+ return -EINVAL;
+
+ hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
+ for (i = 0; i < hest_tab->error_source_count; i++) {
+ len = hest_esrc_len(hest_hdr);
+ if (!len) {
+ pr_warning(FW_WARN HEST_PFX
+ "Unknown or unused hardware error source "
+ "type: %d for hardware error source: %d.\n",
+ hest_hdr->type, hest_hdr->source_id);
+ return -EINVAL;
+ }
+ if ((void *)hest_hdr + len >
+ (void *)hest_tab + hest_tab->header.length) {
+ pr_warning(FW_BUG HEST_PFX
+ "Table contents overflow for hardware error source: %d.\n",
+ hest_hdr->source_id);
+ return -EINVAL;
+ }
+
+ rc = func(hest_hdr, data);
+ if (rc)
+ return rc;
+
+ hest_hdr = (void *)hest_hdr + len;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(apei_hest_parse);
+
+static int __init setup_hest_disable(char *str)
+{
+ hest_disable = 1;
+ return 0;
+}
+
+__setup("hest_disable", setup_hest_disable);
+
+static int __init hest_init(void)
+{
+ acpi_status status;
+ int rc = -ENODEV;
+
+ if (acpi_disabled)
+ goto err;
+
+ if (hest_disable) {
+ pr_info(HEST_PFX "HEST tabling parsing is disabled.\n");
+ goto err;
+ }
+
+ status = acpi_get_table(ACPI_SIG_HEST, 0,
+ (struct acpi_table_header **)&hest_tab);
+ if (status == AE_NOT_FOUND) {
+ pr_info(HEST_PFX "Table is not found!\n");
+ goto err;
+ } else if (ACPI_FAILURE(status)) {
+ const char *msg = acpi_format_exception(status);
+ pr_err(HEST_PFX "Failed to get table, %s\n", msg);
+ rc = -EINVAL;
+ goto err;
+ }
+
+ rc = apei_hest_parse(hest_void_parse, NULL);
+ if (rc)
+ goto err;
+
+ pr_info(HEST_PFX "HEST table parsing is initialized.\n");
+
+ return 0;
+err:
+ hest_disable = 1;
+ return rc;
+}
+
+subsys_initcall(hest_init);
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
new file mode 100644
index 00000000000..631a1ad2d10
--- /dev/null
+++ b/include/acpi/apei.h
@@ -0,0 +1,13 @@
+/*
+ * apei.h - ACPI Platform Error Interface
+ */
+
+#ifndef ACPI_APEI_H
+#define ACPI_APEI_H
+
+extern int hest_disable;
+
+typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data);
+int apei_hest_parse(apei_hest_func_t func, void *data);
+
+#endif