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authorGraeme Gregory <graeme.gregory@linaro.org>2016-06-07 14:12:59 +0100
committerGraeme Gregory <graeme.gregory@linaro.org>2016-06-07 14:12:59 +0100
commitb59c0204dd164780bc8ea400bb2b1bf97c5230bd (patch)
treec12b8c8439291fde4f25a6294f41334a43f16e35
parentc48c84e3a1367a1eba26429c8fe1e97ed7b7c79c (diff)
parent15db3537bc31b8d144dd1a1422646b8ff474aa9c (diff)
downloadleg-kernel-b59c0204dd164780bc8ea400bb2b1bf97c5230bd.tar.gz
Merge branch 'topic-apei' into leg-kernel
-rw-r--r--Documentation/kernel-parameters.txt3
-rw-r--r--arch/arm64/Kconfig1
-rw-r--r--arch/arm64/include/asm/acpi.h15
-rw-r--r--arch/x86/kernel/acpi/apei.c3
-rw-r--r--drivers/acpi/apei/Kconfig1
-rw-r--r--drivers/acpi/apei/Makefile2
-rw-r--r--drivers/acpi/apei/apei-internal.h2
-rw-r--r--drivers/acpi/apei/bert.c150
-rw-r--r--drivers/acpi/apei/hest.c18
-rw-r--r--drivers/acpi/pci_root.c2
-rw-r--r--drivers/acpi/scan.c3
11 files changed, 189 insertions, 11 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 82b42c958d1c..f565259167d7 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -582,6 +582,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
bootmem_debug [KNL] Enable bootmem allocator debug messages.
+ bert_disable [ACPI]
+ Disable BERT OS support on buggy BIOSes.
+
bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards)
bttv.radio= Most important insmod options are available as
kernel args too.
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index cc7808010379..e167260fcd0c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -4,6 +4,7 @@ config ARM64
select ACPI_GENERIC_GSI if ACPI
select ACPI_REDUCED_HARDWARE_ONLY if ACPI
select ACPI_SPCR_TABLE if ACPI
+ select HAVE_ACPI_APEI if ACPI
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select ARCH_HAS_ELF_RANDOMIZE
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index aee323b13802..4a6c959995cc 100644
--- a/arch/arm64/include/asm/acpi.h
+++ b/arch/arm64/include/asm/acpi.h
@@ -17,6 +17,7 @@
#include <asm/cputype.h>
#include <asm/smp_plat.h>
+#include <asm/tlbflush.h>
/* Macros for consistency checks of the GICC subtable of MADT */
#define ACPI_MADT_GICC_LENGTH \
@@ -110,7 +111,19 @@ static inline const char *acpi_get_enable_method(int cpu)
}
#ifdef CONFIG_ACPI_APEI
+#define acpi_disable_cmcff 1
pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
-#endif
+/*
+ * This inline function is used in IRQ context (by GHES driver now),
+ * see ghes_iounmap_irq and ghes_iounmap_nmi in drivers/acpi/apei/ghes.c.
+ * The page mapped is reserved for firmware in kernel. This invalidate TLB
+ * maintenance should be broadcasted safely to make sure that all the cores
+ * will do TLB invalidation, then get the right pages.
+ */
+static inline void arch_apei_flush_tlb_one(unsigned long addr)
+{
+ flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
+}
+#endif /* CONFIG_ACPI_APEI */
#endif /*_ASM_ACPI_H*/
diff --git a/arch/x86/kernel/acpi/apei.c b/arch/x86/kernel/acpi/apei.c
index c280df6b2aa2..ea3046e0b0cf 100644
--- a/arch/x86/kernel/acpi/apei.c
+++ b/arch/x86/kernel/acpi/apei.c
@@ -24,9 +24,6 @@ int arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr, void *data)
struct acpi_hest_ia_corrected *cmc;
struct acpi_hest_ia_error_bank *mc_bank;
- if (hest_hdr->type != ACPI_HEST_TYPE_IA32_CORRECTED_CHECK)
- return 0;
-
cmc = (struct acpi_hest_ia_corrected *)hest_hdr;
if (!cmc->enabled)
return 0;
diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index b0140c8fc733..b037c5c6db97 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -8,6 +8,7 @@ config ACPI_APEI
bool "ACPI Platform Error Interface (APEI)"
select MISC_FILESYSTEMS
select PSTORE
+ select EFI if ARM64
select UEFI_CPER
depends on HAVE_ACPI_APEI
help
diff --git a/drivers/acpi/apei/Makefile b/drivers/acpi/apei/Makefile
index 5d575a955940..e50573de25f1 100644
--- a/drivers/acpi/apei/Makefile
+++ b/drivers/acpi/apei/Makefile
@@ -3,4 +3,4 @@ obj-$(CONFIG_ACPI_APEI_GHES) += ghes.o
obj-$(CONFIG_ACPI_APEI_EINJ) += einj.o
obj-$(CONFIG_ACPI_APEI_ERST_DEBUG) += erst-dbg.o
-apei-y := apei-base.o hest.o erst.o
+apei-y := apei-base.o hest.o erst.o bert.o
diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
index 16129c78b489..6e9f14c0a71b 100644
--- a/drivers/acpi/apei/apei-internal.h
+++ b/drivers/acpi/apei/apei-internal.h
@@ -1,6 +1,6 @@
/*
* apei-internal.h - ACPI Platform Error Interface internal
- * definations.
+ * definitions.
*/
#ifndef APEI_INTERNAL_H
diff --git a/drivers/acpi/apei/bert.c b/drivers/acpi/apei/bert.c
new file mode 100644
index 000000000000..a05b5c0cf181
--- /dev/null
+++ b/drivers/acpi/apei/bert.c
@@ -0,0 +1,150 @@
+/*
+ * APEI Boot Error Record Table (BERT) support
+ *
+ * Copyright 2011 Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ *
+ * Under normal circumstances, when a hardware error occurs, the error
+ * handler receives control and processes the error. This gives OSPM a
+ * chance to process the error condition, report it, and optionally attempt
+ * recovery. In some cases, the system is unable to process an error.
+ * For example, system firmware or a management controller may choose to
+ * reset the system or the system might experience an uncontrolled crash
+ * or reset.The boot error source is used to report unhandled errors that
+ * occurred in a previous boot. This mechanism is described in the BERT
+ * table.
+ *
+ * For more information about BERT, please refer to ACPI Specification
+ * version 4.0, section 17.3.1
+ *
+ * This file is licensed under GPLv2.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+
+#include "apei-internal.h"
+
+#undef pr_fmt
+#define pr_fmt(fmt) "BERT: " fmt
+
+static int bert_disable;
+
+static void __init bert_print_all(struct acpi_bert_region *region,
+ unsigned int region_len)
+{
+ struct acpi_hest_generic_status *estatus =
+ (struct acpi_hest_generic_status *)region;
+ int remain = region_len;
+ u32 estatus_len;
+
+ if (!estatus->block_status)
+ return;
+
+ while (remain > sizeof(struct acpi_bert_region)) {
+ if (cper_estatus_check(estatus)) {
+ pr_err(FW_BUG "Invalid error record.\n");
+ return;
+ }
+
+ estatus_len = cper_estatus_len(estatus);
+ if (remain < estatus_len) {
+ pr_err(FW_BUG "Truncated status block (length: %u).\n",
+ estatus_len);
+ return;
+ }
+
+ pr_info_once("Error records from previous boot:\n");
+
+ cper_estatus_print(KERN_INFO HW_ERR, estatus);
+
+ /*
+ * Because the boot error source is "one-time polled" type,
+ * clear Block Status of current Generic Error Status Block,
+ * once it's printed.
+ */
+ estatus->block_status = 0;
+
+ estatus = (void *)estatus + estatus_len;
+ /* No more error records. */
+ if (!estatus->block_status)
+ return;
+
+ remain -= estatus_len;
+ }
+}
+
+static int __init setup_bert_disable(char *str)
+{
+ bert_disable = 1;
+
+ return 0;
+}
+__setup("bert_disable", setup_bert_disable);
+
+static int __init bert_check_table(struct acpi_table_bert *bert_tab)
+{
+ if (bert_tab->header.length < sizeof(struct acpi_table_bert) ||
+ bert_tab->region_length < sizeof(struct acpi_bert_region))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int __init bert_init(void)
+{
+ struct acpi_bert_region *boot_error_region;
+ struct acpi_table_bert *bert_tab;
+ unsigned int region_len;
+ acpi_status status;
+ int rc = 0;
+
+ if (acpi_disabled)
+ return 0;
+
+ if (bert_disable) {
+ pr_info("Boot Error Record Table support is disabled.\n");
+ return 0;
+ }
+
+ status = acpi_get_table(ACPI_SIG_BERT, 0, (struct acpi_table_header **)&bert_tab);
+ if (status == AE_NOT_FOUND)
+ return 0;
+
+ if (ACPI_FAILURE(status)) {
+ pr_err("get table failed, %s.\n", acpi_format_exception(status));
+ return -EINVAL;
+ }
+
+ rc = bert_check_table(bert_tab);
+ if (rc) {
+ pr_err(FW_BUG "table invalid.\n");
+ return rc;
+ }
+
+ region_len = bert_tab->region_length;
+ if (!request_mem_region(bert_tab->address, region_len, "APEI BERT")) {
+ pr_err("Can't request iomem region <%016llx-%016llx>.\n",
+ (unsigned long long)bert_tab->address,
+ (unsigned long long)bert_tab->address + region_len - 1);
+ return -EIO;
+ }
+
+ boot_error_region = ioremap_cache(bert_tab->address, region_len);
+ if (boot_error_region) {
+ bert_print_all(boot_error_region, region_len);
+ iounmap(boot_error_region);
+ } else {
+ rc = -ENOMEM;
+ }
+
+ release_mem_region(bert_tab->address, region_len);
+
+ return rc;
+}
+
+late_initcall(bert_init);
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 20b3fcf4007c..792a0d988d13 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -123,7 +123,18 @@ EXPORT_SYMBOL_GPL(apei_hest_parse);
*/
static int __init hest_parse_cmc(struct acpi_hest_header *hest_hdr, void *data)
{
- return arch_apei_enable_cmcff(hest_hdr, data);
+ if (hest_hdr->type != ACPI_HEST_TYPE_IA32_CORRECTED_CHECK)
+ return 0;
+
+ if (!acpi_disable_cmcff)
+ return !arch_apei_enable_cmcff(hest_hdr, data);
+
+ return 0;
+}
+
+static inline int __init hest_ia32_init(void)
+{
+ return apei_hest_parse(hest_parse_cmc, NULL);
}
struct ghes_arr {
@@ -232,8 +243,9 @@ void __init acpi_hest_init(void)
goto err;
}
- if (!acpi_disable_cmcff)
- apei_hest_parse(hest_parse_cmc, NULL);
+ rc = hest_ia32_init();
+ if (rc)
+ goto err;
if (!ghes_disable) {
rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index ae3fe4e64203..a35dd237ded9 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -33,7 +33,6 @@
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/dmi.h>
-#include <acpi/apei.h> /* for acpi_hest_init() */
#include "internal.h"
@@ -865,7 +864,6 @@ out_release_info:
void __init acpi_pci_root_init(void)
{
- acpi_hest_init();
if (acpi_pci_disabled)
return;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5f28cf778349..e51dab7ebd6a 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -13,6 +13,8 @@
#include <linux/nls.h>
#include <linux/dma-mapping.h>
+#include <acpi/apei.h> /* for acpi_hest_init() */
+
#include <asm/pgtable.h>
#include "internal.h"
@@ -1920,6 +1922,7 @@ int __init acpi_scan_init(void)
{
int result;
+ acpi_hest_init();
acpi_pci_root_init();
acpi_pci_link_init();
acpi_processor_init();