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Date: Mon, 4 Aug 2014 14:26:26 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/ras changes for v3.17
Linus,
Please pull the latest x86-ras-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-ras-for-linus
# HEAD: c3107e3c504d3187ed8eac8179494946faff1481 Merge tag 'please-pull-apei' into x86/ras
The main changes in this cycle are:
* RAS tracing/events infrastructure, by Gong Chen.
* Various generalizations of the APEI code to make it available to
non-x86 architectures, by Tomasz Nowicki.
out-of-topic modifications in x86-ras-for-linus:
--------------------------------------------------
drivers/Kconfig # 76ac827: trace, RAS: Add basic RAS trace e
drivers/Makefile # 76ac827: trace, RAS: Add basic RAS trace e
drivers/acpi/Kconfig # 2dfb7d5: trace, RAS: Add eMCA trace event
drivers/acpi/acpi_extlog.c # 7c76bb5: RAS, extlog: Adjust init flow
# d6cae93: trace, eMCA: Add a knob to adjust
# 2dfb7d5: trace, RAS: Add eMCA trace event
drivers/acpi/apei/Kconfig # 44a69f6: acpi, apei, ghes: Make NMI error
drivers/acpi/apei/apei-base.c # 9dae3d0: apei, mce: Factor out APEI archit
drivers/acpi/apei/ghes.c # 594c725: acpi, apei, ghes: Factor out iore
# 44a69f6: acpi, apei, ghes: Make NMI error
# 9dae3d0: apei, mce: Factor out APEI archit
drivers/acpi/apei/hest.c # 9dae3d0: apei, mce: Factor out APEI archit
drivers/edac/Kconfig # 76ac827: trace, RAS: Add basic RAS trace e
drivers/edac/edac_mc.c # 76ac827: trace, RAS: Add basic RAS trace e
drivers/firmware/efi/cper.c # 2dfb7d5: trace, RAS: Add eMCA trace event
# 3760cd2: CPER: Adjust code flow of some fu
drivers/pci/pcie/aer/Kconfig # 0a2409a: trace, AER: Move trace into unifi
drivers/pci/pcie/aer/aerdrv_errprint.c# 0a2409a: trace, AER: Move trace into unifi
drivers/ras/Kconfig # 76ac827: trace, RAS: Add basic RAS trace e
drivers/ras/Makefile # d963cd9: RAS, debugfs: Add debugfs interfa
# 76ac827: trace, RAS: Add basic RAS trace e
drivers/ras/debugfs.c # d963cd9: RAS, debugfs: Add debugfs interfa
drivers/ras/ras.c # 2dfb7d5: trace, RAS: Add eMCA trace event
# d963cd9: RAS, debugfs: Add debugfs interfa
# 76ac827: trace, RAS: Add basic RAS trace e
include/acpi/apei.h # 594c725: acpi, apei, ghes: Factor out iore
# 9dae3d0: apei, mce: Factor out APEI archit
include/linux/aer.h # 5ccb822: x86/ras: Fix build warnings in <l
include/linux/cper.h # 2dfb7d5: trace, RAS: Add eMCA trace event
# 3760cd2: CPER: Adjust code flow of some fu
include/linux/nmi.h # 44a69f6: acpi, apei, ghes: Make NMI error
include/linux/ras.h # d963cd9: RAS, debugfs: Add debugfs interfa
include/ras/ras_event.h # 2dfb7d5: trace, RAS: Add eMCA trace event
# 0a2409a: trace, AER: Move trace into unifi
include/trace/events/ras.h # 0a2409a: trace, AER: Move trace into unifi
Thanks,
Ingo
------------------>
Borislav Petkov (2):
x86, MCE: Kill CPU_POST_DEAD
x86, MCE: Robustify mcheck_init_device
Chen, Gong (7):
trace, RAS: Add basic RAS trace event
trace, AER: Move trace into unified interface
CPER: Adjust code flow of some functions
RAS, debugfs: Add debugfs interface for RAS subsystem
trace, RAS: Add eMCA trace event interface
trace, eMCA: Add a knob to adjust where to save event log
RAS, extlog: Adjust init flow
Mike Qiu (1):
x86/ras: Fix build warnings in <linux/aer.h>
Tomasz Nowicki (3):
apei, mce: Factor out APEI architecture specific MCE calls.
acpi, apei, ghes: Make NMI error notification to be GHES architecture extension.
acpi, apei, ghes: Factor out ioremap virtual memory for IRQ and NMI context.
arch/x86/Kconfig | 2 +
arch/x86/kernel/acpi/Makefile | 1 +
arch/x86/kernel/acpi/apei.c | 62 +++++++++++
arch/x86/kernel/cpu/mcheck/mce.c | 19 ++--
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/acpi/Kconfig | 4 +-
drivers/acpi/acpi_extlog.c | 46 ++++++--
drivers/acpi/apei/Kconfig | 8 +-
drivers/acpi/apei/apei-base.c | 13 +++
drivers/acpi/apei/ghes.c | 173 ++++++++++++++++++-----------
drivers/acpi/apei/hest.c | 29 +----
drivers/edac/Kconfig | 1 +
drivers/edac/edac_mc.c | 3 -
drivers/firmware/efi/cper.c | 192 +++++++++++++++++++++++----------
drivers/pci/pcie/aer/Kconfig | 1 +
drivers/pci/pcie/aer/aerdrv_errprint.c | 4 +-
drivers/ras/Kconfig | 2 +
drivers/ras/Makefile | 1 +
drivers/ras/debugfs.c | 56 ++++++++++
drivers/ras/ras.c | 29 +++++
include/acpi/apei.h | 4 +
include/linux/aer.h | 2 +
include/linux/cper.h | 32 ++++++
include/linux/nmi.h | 4 +
include/linux/ras.h | 14 +++
include/ras/ras_event.h | 128 ++++++++++++++++++++++
include/trace/events/ras.h | 77 -------------
28 files changed, 659 insertions(+), 251 deletions(-)
create mode 100644 arch/x86/kernel/acpi/apei.c
create mode 100644 drivers/ras/Kconfig
create mode 100644 drivers/ras/Makefile
create mode 100644 drivers/ras/debugfs.c
create mode 100644 drivers/ras/ras.c
create mode 100644 include/linux/ras.h
delete mode 100644 include/trace/events/ras.h
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d24887b..4387344 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -132,6 +132,8 @@ config X86
select GENERIC_CPU_AUTOPROBE
select HAVE_ARCH_AUDITSYSCALL
select ARCH_SUPPORTS_ATOMIC_RMW
+ select HAVE_ACPI_APEI if ACPI
+ select HAVE_ACPI_APEI_NMI if ACPI
config INSTRUCTION_DECODER
def_bool y
diff --git a/arch/x86/kernel/acpi/Makefile b/arch/x86/kernel/acpi/Makefile
index 163b225..3242e59 100644
--- a/arch/x86/kernel/acpi/Makefile
+++ b/arch/x86/kernel/acpi/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_ACPI) += boot.o
obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup_$(BITS).o
+obj-$(CONFIG_ACPI_APEI) += apei.o
ifneq ($(CONFIG_ACPI_PROCESSOR),)
obj-y += cstate.o
diff --git a/arch/x86/kernel/acpi/apei.c b/arch/x86/kernel/acpi/apei.c
new file mode 100644
index 0000000..c280df6
--- /dev/null
+++ b/arch/x86/kernel/acpi/apei.c
@@ -0,0 +1,62 @@
+/*
+ * Arch-specific APEI-related functions.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <acpi/apei.h>
+
+#include <asm/mce.h>
+#include <asm/tlbflush.h>
+
+int arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr, void *data)
+{
+#ifdef CONFIG_X86_MCE
+ int i;
+ 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;
+
+ /*
+ * We expect HEST to provide a list of MC banks that report errors
+ * in firmware first mode. Otherwise, return non-zero value to
+ * indicate that we are done parsing HEST.
+ */
+ if (!(cmc->flags & ACPI_HEST_FIRMWARE_FIRST) ||
+ !cmc->num_hardware_banks)
+ return 1;
+
+ pr_info("HEST: Enabling Firmware First mode for corrected errors.\n");
+
+ mc_bank = (struct acpi_hest_ia_error_bank *)(cmc + 1);
+ for (i = 0; i < cmc->num_hardware_banks; i++, mc_bank++)
+ mce_disable_bank(mc_bank->bank_number);
+#endif
+ return 1;
+}
+
+void arch_apei_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
+{
+#ifdef CONFIG_X86_MCE
+ apei_mce_report_mem_error(sev, mem_err);
+#endif
+}
+
+void arch_apei_flush_tlb_one(unsigned long addr)
+{
+ __flush_tlb_one(addr);
+}
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index bb92f38..4fc5797 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -2385,6 +2385,10 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
threshold_cpu_callback(action, cpu);
mce_device_remove(cpu);
mce_intel_hcpu_update(cpu);
+
+ /* intentionally ignoring frozen here */
+ if (!(action & CPU_TASKS_FROZEN))
+ cmci_rediscover();
break;
case CPU_DOWN_PREPARE:
smp_call_function_single(cpu, mce_disable_cpu, &action, 1);
@@ -2396,11 +2400,6 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
break;
}
- if (action == CPU_POST_DEAD) {
- /* intentionally ignoring frozen here */
- cmci_rediscover();
- }
-
return NOTIFY_OK;
}
@@ -2451,6 +2450,12 @@ static __init int mcheck_init_device(void)
for_each_online_cpu(i) {
err = mce_device_create(i);
if (err) {
+ /*
+ * Register notifier anyway (and do not unreg it) so
+ * that we don't leave undeleted timers, see notifier
+ * callback above.
+ */
+ __register_hotcpu_notifier(&mce_cpu_notifier);
cpu_notifier_register_done();
goto err_device_create;
}
@@ -2471,10 +2476,6 @@ static __init int mcheck_init_device(void)
err_register:
unregister_syscore_ops(&mce_syscore_ops);
- cpu_notifier_register_begin();
- __unregister_hotcpu_notifier(&mce_cpu_notifier);
- cpu_notifier_register_done();
-
err_device_create:
/*
* We didn't keep track of which devices were created above, but
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 0e87a34..4e6e66c 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -176,4 +176,6 @@ source "drivers/powercap/Kconfig"
source "drivers/mcb/Kconfig"
+source "drivers/ras/Kconfig"
+
endmenu
diff --git a/drivers/Makefile b/drivers/Makefile
index f98b50d..65c32b1 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -158,3 +158,4 @@ obj-$(CONFIG_NTB) += ntb/
obj-$(CONFIG_FMC) += fmc/
obj-$(CONFIG_POWERCAP) += powercap/
obj-$(CONFIG_MCB) += mcb/
+obj-$(CONFIG_RAS) += ras/
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index a34a228..206942b 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -370,6 +370,7 @@ config ACPI_EXTLOG
tristate "Extended Error Log support"
depends on X86_MCE && X86_LOCAL_APIC
select UEFI_CPER
+ select RAS
default n
help
Certain usages such as Predictive Failure Analysis (PFA) require
@@ -384,6 +385,7 @@ config ACPI_EXTLOG
Enhanced MCA Logging allows firmware to provide additional error
information to system software, synchronous with MCE or CMCI. This
- driver adds support for that functionality.
+ driver adds support for that functionality with corresponding
+ tracepoint which carries that information to userspace.
endif # ACPI
diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
index 1853341..0ad6f38 100644
--- a/drivers/acpi/acpi_extlog.c
+++ b/drivers/acpi/acpi_extlog.c
@@ -12,10 +12,12 @@
#include <linux/cper.h>
#include <linux/ratelimit.h>
#include <linux/edac.h>
+#include <linux/ras.h>
#include <asm/cpu.h>
#include <asm/mce.h>
#include "apei/apei-internal.h"
+#include <ras/ras_event.h>
#define EXT_ELOG_ENTRY_MASK GENMASK_ULL(51, 0) /* elog entry address mask */
@@ -137,8 +139,12 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
struct mce *mce = (struct mce *)data;
int bank = mce->bank;
int cpu = mce->extcpu;
- struct acpi_generic_status *estatus;
- int rc;
+ struct acpi_generic_status *estatus, *tmp;
+ struct acpi_generic_data *gdata;
+ const uuid_le *fru_id = &NULL_UUID_LE;
+ char *fru_text = "";
+ uuid_le *sec_type;
+ static u32 err_seq;
estatus = extlog_elog_entry_check(cpu, bank);
if (estatus == NULL)
@@ -148,8 +154,29 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
/* clear record status to enable BIOS to update it again */
estatus->block_status = 0;
- rc = print_extlog_rcd(NULL, (struct acpi_generic_status *)elog_buf, cpu);
+ tmp = (struct acpi_generic_status *)elog_buf;
+
+ if (!ras_userspace_consumers()) {
+ print_extlog_rcd(NULL, tmp, cpu);
+ goto out;
+ }
+
+ /* log event via trace */
+ err_seq++;
+ gdata = (struct acpi_generic_data *)(tmp + 1);
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
+ fru_id = (uuid_le *)gdata->fru_id;
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
+ fru_text = gdata->fru_text;
+ sec_type = (uuid_le *)gdata->section_type;
+ if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
+ struct cper_sec_mem_err *mem = (void *)(gdata + 1);
+ if (gdata->error_data_length >= sizeof(*mem))
+ trace_extlog_mem_event(mem, err_seq, fru_id, fru_text,
+ (u8)gdata->error_severity);
+ }
+out:
return NOTIFY_STOP;
}
@@ -196,19 +223,16 @@ static int __init extlog_init(void)
u64 cap;
int rc;
+ rdmsrl(MSR_IA32_MCG_CAP, cap);
+
+ if (!(cap & MCG_ELOG_P) || !extlog_get_l1addr())
+ return -ENODEV;
+
if (get_edac_report_status() == EDAC_REPORTING_FORCE) {
pr_warn("Not loading eMCA, error reporting force-enabled through EDAC.\n");
return -EPERM;
}
- rc = -ENODEV;
- rdmsrl(MSR_IA32_MCG_CAP, cap);
- if (!(cap & MCG_ELOG_P))
- return rc;
-
- if (!extlog_get_l1addr())
- return rc;
-
rc = -EINVAL;
/* get L1 header to fetch necessary information */
l1_hdr_size = sizeof(struct extlog_l1_head);
diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index c4dac71..b0140c8 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -1,9 +1,15 @@
+config HAVE_ACPI_APEI
+ bool
+
+config HAVE_ACPI_APEI_NMI
+ bool
+
config ACPI_APEI
bool "ACPI Platform Error Interface (APEI)"
select MISC_FILESYSTEMS
select PSTORE
select UEFI_CPER
- depends on X86
+ depends on HAVE_ACPI_APEI
help
APEI allows to report errors (for example from the chipset)
to the operating system. This improves NMI handling
diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index 8678dfe..2cd7bdd 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -745,6 +745,19 @@ struct dentry *apei_get_debugfs_dir(void)
}
EXPORT_SYMBOL_GPL(apei_get_debugfs_dir);
+int __weak arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr,
+ void *data)
+{
+ return 1;
+}
+EXPORT_SYMBOL_GPL(arch_apei_enable_cmcff);
+
+void __weak arch_apei_report_mem_error(int sev,
+ struct cper_sec_mem_err *mem_err)
+{
+}
+EXPORT_SYMBOL_GPL(arch_apei_report_mem_error);
+
int apei_osc_setup(void)
{
static u8 whea_uuid_str[] = "ed855e0c-6c90-47bf-a62a-26de0fc5ad5c";
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index dab7cb7..e05d84e7 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -47,11 +47,11 @@
#include <linux/genalloc.h>
#include <linux/pci.h>
#include <linux/aer.h>
+#include <linux/nmi.h>
#include <acpi/ghes.h>
-#include <asm/mce.h>
+#include <acpi/apei.h>
#include <asm/tlbflush.h>
-#include <asm/nmi.h>
#include "apei-internal.h"
@@ -86,8 +86,6 @@
bool ghes_disable;
module_param_named(disable, ghes_disable, bool, 0);
-static int ghes_panic_timeout __read_mostly = 30;
-
/*
* All error sources notified with SCI shares one notifier function,
* so they need to be linked and checked one by one. This is applied
@@ -97,16 +95,9 @@ static int ghes_panic_timeout __read_mostly = 30;
* list changing, not for traversing.
*/
static LIST_HEAD(ghes_sci);
-static LIST_HEAD(ghes_nmi);
static DEFINE_MUTEX(ghes_list_mutex);
/*
- * NMI may be triggered on any CPU, so ghes_nmi_lock is used for
- * mutual exclusion.
- */
-static DEFINE_RAW_SPINLOCK(ghes_nmi_lock);
-
-/*
* Because the memory area used to transfer hardware error information
* from BIOS to Linux can be determined only in NMI, IRQ or timer
* handler, but general ioremap can not be used in atomic context, so
@@ -114,12 +105,16 @@ static DEFINE_RAW_SPINLOCK(ghes_nmi_lock);
*/
/*
- * Two virtual pages are used, one for NMI context, the other for
- * IRQ/PROCESS context
+ * Two virtual pages are used, one for IRQ/PROCESS context, the other for
+ * NMI context (optionally).
*/
-#define GHES_IOREMAP_PAGES 2
-#define GHES_IOREMAP_NMI_PAGE(base) (base)
-#define GHES_IOREMAP_IRQ_PAGE(base) ((base) + PAGE_SIZE)
+#ifdef CONFIG_HAVE_ACPI_APEI_NMI
+#define GHES_IOREMAP_PAGES 2
+#else
+#define GHES_IOREMAP_PAGES 1
+#endif
+#define GHES_IOREMAP_IRQ_PAGE(base) (base)
+#define GHES_IOREMAP_NMI_PAGE(base) ((base) + PAGE_SIZE)
/* virtual memory area for atomic ioremap */
static struct vm_struct *ghes_ioremap_area;
@@ -130,18 +125,8 @@ static struct vm_struct *ghes_ioremap_area;
static DEFINE_RAW_SPINLOCK(ghes_ioremap_lock_nmi);
static DEFINE_SPINLOCK(ghes_ioremap_lock_irq);
-/*
- * printk is not safe in NMI context. So in NMI handler, we allocate
- * required memory from lock-less memory allocator
- * (ghes_estatus_pool), save estatus into it, put them into lock-less
- * list (ghes_estatus_llist), then delay printk into IRQ context via
- * irq_work (ghes_proc_irq_work). ghes_estatus_size_request record
- * required pool size by all NMI error source.
- */
static struct gen_pool *ghes_estatus_pool;
static unsigned long ghes_estatus_pool_size_request;
-static struct llist_head ghes_estatus_llist;
-static struct irq_work ghes_proc_irq_work;
struct ghes_estatus_cache *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE];
static atomic_t ghes_estatus_cache_alloced;
@@ -192,7 +177,7 @@ static void ghes_iounmap_nmi(void __iomem *vaddr_ptr)
BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_NMI_PAGE(base));
unmap_kernel_range_noflush(vaddr, PAGE_SIZE);
- __flush_tlb_one(vaddr);
+ arch_apei_flush_tlb_one(vaddr);
}
static void ghes_iounmap_irq(void __iomem *vaddr_ptr)
@@ -202,7 +187,7 @@ static void ghes_iounmap_irq(void __iomem *vaddr_ptr)
BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_IRQ_PAGE(base));
unmap_kernel_range_noflush(vaddr, PAGE_SIZE);
- __flush_tlb_one(vaddr);
+ arch_apei_flush_tlb_one(vaddr);
}
static int ghes_estatus_pool_init(void)
@@ -249,11 +234,6 @@ static int ghes_estatus_pool_expand(unsigned long len)
return 0;
}
-static void ghes_estatus_pool_shrink(unsigned long len)
-{
- ghes_estatus_pool_size_request -= PAGE_ALIGN(len);
-}
-
static struct ghes *ghes_new(struct acpi_hest_generic *generic)
{
struct ghes *ghes;
@@ -455,9 +435,7 @@ static void ghes_do_proc(struct ghes *ghes,
mem_err = (struct cper_sec_mem_err *)(gdata+1);
ghes_edac_report_mem_error(ghes, sev, mem_err);
-#ifdef CONFIG_X86_MCE
- apei_mce_report_mem_error(sev, mem_err);
-#endif
+ arch_apei_report_mem_error(sev, mem_err);
ghes_handle_memory_failure(gdata, sev);
}
#ifdef CONFIG_ACPI_APEI_PCIEAER
@@ -734,6 +712,32 @@ static int ghes_notify_sci(struct notifier_block *this,
return ret;
}
+static struct notifier_block ghes_notifier_sci = {
+ .notifier_call = ghes_notify_sci,
+};
+
+#ifdef CONFIG_HAVE_ACPI_APEI_NMI
+/*
+ * printk is not safe in NMI context. So in NMI handler, we allocate
+ * required memory from lock-less memory allocator
+ * (ghes_estatus_pool), save estatus into it, put them into lock-less
+ * list (ghes_estatus_llist), then delay printk into IRQ context via
+ * irq_work (ghes_proc_irq_work). ghes_estatus_size_request record
+ * required pool size by all NMI error source.
+ */
+static struct llist_head ghes_estatus_llist;
+static struct irq_work ghes_proc_irq_work;
+
+/*
+ * NMI may be triggered on any CPU, so ghes_nmi_lock is used for
+ * mutual exclusion.
+ */
+static DEFINE_RAW_SPINLOCK(ghes_nmi_lock);
+
+static LIST_HEAD(ghes_nmi);
+
+static int ghes_panic_timeout __read_mostly = 30;
+
static struct llist_node *llist_nodes_reverse(struct llist_node *llnode)
{
struct llist_node *next, *tail = NULL;
@@ -877,10 +881,6 @@ out:
return ret;
}
-static struct notifier_block ghes_notifier_sci = {
- .notifier_call = ghes_notify_sci,
-};
-
static unsigned long ghes_esource_prealloc_size(
const struct acpi_hest_generic *generic)
{
@@ -896,11 +896,71 @@ static unsigned long ghes_esource_prealloc_size(
return prealloc_size;
}
+static void ghes_estatus_pool_shrink(unsigned long len)
+{
+ ghes_estatus_pool_size_request -= PAGE_ALIGN(len);
+}
+
+static void ghes_nmi_add(struct ghes *ghes)
+{
+ unsigned long len;
+
+ len = ghes_esource_prealloc_size(ghes->generic);
+ ghes_estatus_pool_expand(len);
+ mutex_lock(&ghes_list_mutex);
+ if (list_empty(&ghes_nmi))
+ register_nmi_handler(NMI_LOCAL, ghes_notify_nmi, 0, "ghes");
+ list_add_rcu(&ghes->list, &ghes_nmi);
+ mutex_unlock(&ghes_list_mutex);
+}
+
+static void ghes_nmi_remove(struct ghes *ghes)
+{
+ unsigned long len;
+
+ mutex_lock(&ghes_list_mutex);
+ list_del_rcu(&ghes->list);
+ if (list_empty(&ghes_nmi))
+ unregister_nmi_handler(NMI_LOCAL, "ghes");
+ mutex_unlock(&ghes_list_mutex);
+ /*
+ * To synchronize with NMI handler, ghes can only be
+ * freed after NMI handler finishes.
+ */
+ synchronize_rcu();
+ len = ghes_esource_prealloc_size(ghes->generic);
+ ghes_estatus_pool_shrink(len);
+}
+
+static void ghes_nmi_init_cxt(void)
+{
+ init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq);
+}
+#else /* CONFIG_HAVE_ACPI_APEI_NMI */
+static inline void ghes_nmi_add(struct ghes *ghes)
+{
+ pr_err(GHES_PFX "ID: %d, trying to add NMI notification which is not supported!\n",
+ ghes->generic->header.source_id);
+ BUG();
+}
+
+static inline void ghes_nmi_remove(struct ghes *ghes)
+{
+ pr_err(GHES_PFX "ID: %d, trying to remove NMI notification which is not supported!\n",
+ ghes->generic->header.source_id);
+ BUG();
+}
+
+static inline void ghes_nmi_init_cxt(void)
+{
+}
+#endif /* CONFIG_HAVE_ACPI_APEI_NMI */
+
static int ghes_probe(struct platform_device *ghes_dev)
{
struct acpi_hest_generic *generic;
struct ghes *ghes = NULL;
- unsigned long len;
+
int rc = -EINVAL;
generic = *(struct acpi_hest_generic **)ghes_dev->dev.platform_data;
@@ -911,7 +971,13 @@ static int ghes_probe(struct platform_device *ghes_dev)
case ACPI_HEST_NOTIFY_POLLED:
case ACPI_HEST_NOTIFY_EXTERNAL:
case ACPI_HEST_NOTIFY_SCI:
+ break;
case ACPI_HEST_NOTIFY_NMI:
+ if (!IS_ENABLED(CONFIG_HAVE_ACPI_APEI_NMI)) {
+ pr_warn(GHES_PFX "Generic hardware error source: %d notified via NMI interrupt is not supported!\n",
+ generic->header.source_id);
+ goto err;
+ }
break;
case ACPI_HEST_NOTIFY_LOCAL:
pr_warning(GHES_PFX "Generic hardware error source: %d notified via local interrupt is not supported!\n",
@@ -972,14 +1038,7 @@ static int ghes_probe(struct platform_device *ghes_dev)
mutex_unlock(&ghes_list_mutex);
break;
case ACPI_HEST_NOTIFY_NMI:
- len = ghes_esource_prealloc_size(generic);
- ghes_estatus_pool_expand(len);
- mutex_lock(&ghes_list_mutex);
- if (list_empty(&ghes_nmi))
- register_nmi_handler(NMI_LOCAL, ghes_notify_nmi, 0,
- "ghes");
- list_add_rcu(&ghes->list, &ghes_nmi);
- mutex_unlock(&ghes_list_mutex);
+ ghes_nmi_add(ghes);
break;
default:
BUG();
@@ -1001,7 +1060,6 @@ static int ghes_remove(struct platform_device *ghes_dev)
{
struct ghes *ghes;
struct acpi_hest_generic *generic;
- unsigned long len;
ghes = platform_get_drvdata(ghes_dev);
generic = ghes->generic;
@@ -1022,18 +1080,7 @@ static int ghes_remove(struct platform_device *ghes_dev)
mutex_unlock(&ghes_list_mutex);
break;
case ACPI_HEST_NOTIFY_NMI:
- mutex_lock(&ghes_list_mutex);
- list_del_rcu(&ghes->list);
- if (list_empty(&ghes_nmi))
- unregister_nmi_handler(NMI_LOCAL, "ghes");
- mutex_unlock(&ghes_list_mutex);
- /*
- * To synchronize with NMI handler, ghes can only be
- * freed after NMI handler finishes.
- */
- synchronize_rcu();
- len = ghes_esource_prealloc_size(generic);
- ghes_estatus_pool_shrink(len);
+ ghes_nmi_remove(ghes);
break;
default:
BUG();
@@ -1077,7 +1124,7 @@ static int __init ghes_init(void)
return -EINVAL;
}
- init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq);
+ ghes_nmi_init_cxt();
rc = ghes_ioremap_init();
if (rc)
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index f5e37f3..06e9b41 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -36,7 +36,6 @@
#include <linux/io.h>
#include <linux/platform_device.h>
#include <acpi/apei.h>
-#include <asm/mce.h>
#include "apei-internal.h"
@@ -128,33 +127,7 @@ EXPORT_SYMBOL_GPL(apei_hest_parse);
*/
static int __init hest_parse_cmc(struct acpi_hest_header *hest_hdr, void *data)
{
-#ifdef CONFIG_X86_MCE
- int i;
- 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;
-
- /*
- * We expect HEST to provide a list of MC banks that report errors
- * in firmware first mode. Otherwise, return non-zero value to
- * indicate that we are done parsing HEST.
- */
- if (!(cmc->flags & ACPI_HEST_FIRMWARE_FIRST) || !cmc->num_hardware_banks)
- return 1;
-
- pr_info(HEST_PFX "Enabling Firmware First mode for corrected errors.\n");
-
- mc_bank = (struct acpi_hest_ia_error_bank *)(cmc + 1);
- for (i = 0; i < cmc->num_hardware_banks; i++, mc_bank++)
- mce_disable_bank(mc_bank->bank_number);
-#endif
- return 1;
+ return arch_apei_enable_cmcff(hest_hdr, data);
}
struct ghes_arr {
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 878f090..d3c0465 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -72,6 +72,7 @@ config EDAC_MCE_INJ
config EDAC_MM_EDAC
tristate "Main Memory EDAC (Error Detection And Correction) reporting"
+ select RAS
help
Some systems are able to detect and correct errors in main
memory. EDAC can report statistics on memory error
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 2c694b5..9f134823 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -33,9 +33,6 @@
#include <asm/edac.h>
#include "edac_core.h"
#include "edac_module.h"
-
-#define CREATE_TRACE_POINTS
-#define TRACE_INCLUDE_PATH ../../include/ras
#include <ras/ras_event.h>
/* lock to memory controller's control array */
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index 1491dd4..437e6fd 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -34,6 +34,9 @@
#include <linux/aer.h>
#define INDENT_SP " "
+
+static char rcd_decode_str[CPER_REC_LEN];
+
/*
* CPER record ID need to be unique even after reboot, because record
* ID is used as index for ERST storage, while CPER records from
@@ -50,18 +53,19 @@ u64 cper_next_record_id(void)
}
EXPORT_SYMBOL_GPL(cper_next_record_id);
-static const char *cper_severity_strs[] = {
+static const char * const severity_strs[] = {
"recoverable",
"fatal",
"corrected",
"info",
};
-static const char *cper_severity_str(unsigned int severity)
+const char *cper_severity_str(unsigned int severity)
{
- return severity < ARRAY_SIZE(cper_severity_strs) ?
- cper_severity_strs[severity] : "unknown";
+ return severity < ARRAY_SIZE(severity_strs) ?
+ severity_strs[severity] : "unknown";
}
+EXPORT_SYMBOL_GPL(cper_severity_str);
/*
* cper_print_bits - print strings for set bits
@@ -100,32 +104,32 @@ void cper_print_bits(const char *pfx, unsigned int bits,
printk("%s\n", buf);
}
-static const char * const cper_proc_type_strs[] = {
+static const char * const proc_type_strs[] = {
"IA32/X64",
"IA64",
};
-static const char * const cper_proc_isa_strs[] = {
+static const char * const proc_isa_strs[] = {
"IA32",
"IA64",
"X64",
};
-static const char * const cper_proc_error_type_strs[] = {
+static const char * const proc_error_type_strs[] = {
"cache error",
"TLB error",
"bus error",
"micro-architectural error",
};
-static const char * const cper_proc_op_strs[] = {
+static const char * const proc_op_strs[] = {
"unknown or generic",
"data read",
"data write",
"instruction execution",
};
-static const char * const cper_proc_flag_strs[] = {
+static const char * const proc_flag_strs[] = {
"restartable",
"precise IP",
"overflow",
@@ -137,26 +141,26 @@ static void cper_print_proc_generic(const char *pfx,
{
if (proc->validation_bits & CPER_PROC_VALID_TYPE)
printk("%s""processor_type: %d, %s\n", pfx, proc->proc_type,
- proc->proc_type < ARRAY_SIZE(cper_proc_type_strs) ?
- cper_proc_type_strs[proc->proc_type] : "unknown");
+ proc->proc_type < ARRAY_SIZE(proc_type_strs) ?
+ proc_type_strs[proc->proc_type] : "unknown");
if (proc->validation_bits & CPER_PROC_VALID_ISA)
printk("%s""processor_isa: %d, %s\n", pfx, proc->proc_isa,
- proc->proc_isa < ARRAY_SIZE(cper_proc_isa_strs) ?
- cper_proc_isa_strs[proc->proc_isa] : "unknown");
+ proc->proc_isa < ARRAY_SIZE(proc_isa_strs) ?
+ proc_isa_strs[proc->proc_isa] : "unknown");
if (proc->validation_bits & CPER_PROC_VALID_ERROR_TYPE) {
printk("%s""error_type: 0x%02x\n", pfx, proc->proc_error_type);
cper_print_bits(pfx, proc->proc_error_type,
- cper_proc_error_type_strs,
- ARRAY_SIZE(cper_proc_error_type_strs));
+ proc_error_type_strs,
+ ARRAY_SIZE(proc_error_type_strs));
}
if (proc->validation_bits & CPER_PROC_VALID_OPERATION)
printk("%s""operation: %d, %s\n", pfx, proc->operation,
- proc->operation < ARRAY_SIZE(cper_proc_op_strs) ?
- cper_proc_op_strs[proc->operation] : "unknown");
+ proc->operation < ARRAY_SIZE(proc_op_strs) ?
+ proc_op_strs[proc->operation] : "unknown");
if (proc->validation_bits & CPER_PROC_VALID_FLAGS) {
printk("%s""flags: 0x%02x\n", pfx, proc->flags);
- cper_print_bits(pfx, proc->flags, cper_proc_flag_strs,
- ARRAY_SIZE(cper_proc_flag_strs));
+ cper_print_bits(pfx, proc->flags, proc_flag_strs,
+ ARRAY_SIZE(proc_flag_strs));
}
if (proc->validation_bits & CPER_PROC_VALID_LEVEL)
printk("%s""level: %d\n", pfx, proc->level);
@@ -177,7 +181,7 @@ static void cper_print_proc_generic(const char *pfx,
printk("%s""IP: 0x%016llx\n", pfx, proc->ip);
}
-static const char *cper_mem_err_type_strs[] = {
+static const char * const mem_err_type_strs[] = {
"unknown",
"no error",
"single-bit ECC",
@@ -196,58 +200,136 @@ static const char *cper_mem_err_type_strs[] = {
"physical memory map-out event",
};
-static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
+const char *cper_mem_err_type_str(unsigned int etype)
{
- if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS)
- printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status);
- if (mem->validation_bits & CPER_MEM_VALID_PA)
- printk("%s""physical_address: 0x%016llx\n",
- pfx, mem->physical_addr);
- if (mem->validation_bits & CPER_MEM_VALID_PA_MASK)
- printk("%s""physical_address_mask: 0x%016llx\n",
- pfx, mem->physical_addr_mask);
+ return etype < ARRAY_SIZE(mem_err_type_strs) ?
+ mem_err_type_strs[etype] : "unknown";
+}
+EXPORT_SYMBOL_GPL(cper_mem_err_type_str);
+
+static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg)
+{
+ u32 len, n;
+
+ if (!msg)
+ return 0;
+
+ n = 0;
+ len = CPER_REC_LEN - 1;
if (mem->validation_bits & CPER_MEM_VALID_NODE)
- pr_debug("node: %d\n", mem->node);
+ n += scnprintf(msg + n, len - n, "node: %d ", mem->node);
if (mem->validation_bits & CPER_MEM_VALID_CARD)
- pr_debug("card: %d\n", mem->card);
+ n += scnprintf(msg + n, len - n, "card: %d ", mem->card);
if (mem->validation_bits & CPER_MEM_VALID_MODULE)
- pr_debug("module: %d\n", mem->module);
+ n += scnprintf(msg + n, len - n, "module: %d ", mem->module);
if (mem->validation_bits & CPER_MEM_VALID_RANK_NUMBER)
- pr_debug("rank: %d\n", mem->rank);
+ n += scnprintf(msg + n, len - n, "rank: %d ", mem->rank);
if (mem->validation_bits & CPER_MEM_VALID_BANK)
- pr_debug("bank: %d\n", mem->bank);
+ n += scnprintf(msg + n, len - n, "bank: %d ", mem->bank);
if (mem->validation_bits & CPER_MEM_VALID_DEVICE)
- pr_debug("device: %d\n", mem->device);
+ n += scnprintf(msg + n, len - n, "device: %d ", mem->device);
if (mem->validation_bits & CPER_MEM_VALID_ROW)
- pr_debug("row: %d\n", mem->row);
+ n += scnprintf(msg + n, len - n, "row: %d ", mem->row);
if (mem->validation_bits & CPER_MEM_VALID_COLUMN)
- pr_debug("column: %d\n", mem->column);
+ n += scnprintf(msg + n, len - n, "column: %d ", mem->column);
if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION)
- pr_debug("bit_position: %d\n", mem->bit_pos);
+ n += scnprintf(msg + n, len - n, "bit_position: %d ",
+ mem->bit_pos);
if (mem->validation_bits & CPER_MEM_VALID_REQUESTOR_ID)
- pr_debug("requestor_id: 0x%016llx\n", mem->requestor_id);
+ n += scnprintf(msg + n, len - n, "requestor_id: 0x%016llx ",
+ mem->requestor_id);
if (mem->validation_bits & CPER_MEM_VALID_RESPONDER_ID)
- pr_debug("responder_id: 0x%016llx\n", mem->responder_id);
+ n += scnprintf(msg + n, len - n, "responder_id: 0x%016llx ",
+ mem->responder_id);
if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID)
- pr_debug("target_id: 0x%016llx\n", mem->target_id);
+ scnprintf(msg + n, len - n, "target_id: 0x%016llx ",
+ mem->target_id);
+
+ msg[n] = '\0';
+ return n;
+}
+
+static int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg)
+{
+ u32 len, n;
+ const char *bank = NULL, *device = NULL;
+
+ if (!msg || !(mem->validation_bits & CPER_MEM_VALID_MODULE_HANDLE))
+ return 0;
+
+ n = 0;
+ len = CPER_REC_LEN - 1;
+ dmi_memdev_name(mem->mem_dev_handle, &bank, &device);
+ if (bank && device)
+ n = snprintf(msg, len, "DIMM location: %s %s ", bank, device);
+ else
+ n = snprintf(msg, len,
+ "DIMM location: not present. DMI handle: 0x%.4x ",
+ mem->mem_dev_handle);
+
+ msg[n] = '\0';
+ return n;
+}
+
+void cper_mem_err_pack(const struct cper_sec_mem_err *mem,
+ struct cper_mem_err_compact *cmem)
+{
+ cmem->validation_bits = mem->validation_bits;
+ cmem->node = mem->node;
+ cmem->card = mem->card;
+ cmem->module = mem->module;
+ cmem->bank = mem->bank;
+ cmem->device = mem->device;
+ cmem->row = mem->row;
+ cmem->column = mem->column;
+ cmem->bit_pos = mem->bit_pos;
+ cmem->requestor_id = mem->requestor_id;
+ cmem->responder_id = mem->responder_id;
+ cmem->target_id = mem->target_id;
+ cmem->rank = mem->rank;
+ cmem->mem_array_handle = mem->mem_array_handle;
+ cmem->mem_dev_handle = mem->mem_dev_handle;
+}
+
+const char *cper_mem_err_unpack(struct trace_seq *p,
+ struct cper_mem_err_compact *cmem)
+{
+ const char *ret = p->buffer + p->len;
+
+ if (cper_mem_err_location(cmem, rcd_decode_str))
+ trace_seq_printf(p, "%s", rcd_decode_str);
+ if (cper_dimm_err_location(cmem, rcd_decode_str))
+ trace_seq_printf(p, "%s", rcd_decode_str);
+ trace_seq_putc(p, '\0');
+
+ return ret;
+}
+
+static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
+{
+ struct cper_mem_err_compact cmem;
+
+ if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS)
+ printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status);
+ if (mem->validation_bits & CPER_MEM_VALID_PA)
+ printk("%s""physical_address: 0x%016llx\n",
+ pfx, mem->physical_addr);
+ if (mem->validation_bits & CPER_MEM_VALID_PA_MASK)
+ printk("%s""physical_address_mask: 0x%016llx\n",
+ pfx, mem->physical_addr_mask);
+ cper_mem_err_pack(mem, &cmem);
+ if (cper_mem_err_location(&cmem, rcd_decode_str))
+ printk("%s%s\n", pfx, rcd_decode_str);
if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) {
u8 etype = mem->error_type;
printk("%s""error_type: %d, %s\n", pfx, etype,
- etype < ARRAY_SIZE(cper_mem_err_type_strs) ?
- cper_mem_err_type_strs[etype] : "unknown");
- }
- if (mem->validation_bits & CPER_MEM_VALID_MODULE_HANDLE) {
- const char *bank = NULL, *device = NULL;
- dmi_memdev_name(mem->mem_dev_handle, &bank, &device);
- if (bank != NULL && device != NULL)
- printk("%s""DIMM location: %s %s", pfx, bank, device);
- else
- printk("%s""DIMM DMI handle: 0x%.4x",
- pfx, mem->mem_dev_handle);
+ cper_mem_err_type_str(etype));
}
+ if (cper_dimm_err_location(&cmem, rcd_decode_str))
+ printk("%s%s\n", pfx, rcd_decode_str);
}
-static const char *cper_pcie_port_type_strs[] = {
+static const char * const pcie_port_type_strs[] = {
"PCIe end point",
"legacy PCI end point",
"unknown",
@@ -266,8 +348,8 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
{
if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
- pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
- cper_pcie_port_type_strs[pcie->port_type] : "unknown");
+ pcie->port_type < ARRAY_SIZE(pcie_port_type_strs) ?
+ pcie_port_type_strs[pcie->port_type] : "unknown");
if (pcie->validation_bits & CPER_PCIE_VALID_VERSION)
printk("%s""version: %d.%d\n", pfx,
pcie->version.major, pcie->version.minor);
diff --git a/drivers/pci/pcie/aer/Kconfig b/drivers/pci/pcie/aer/Kconfig
index 50e94e0..3894402 100644
--- a/drivers/pci/pcie/aer/Kconfig
+++ b/drivers/pci/pcie/aer/Kconfig
@@ -5,6 +5,7 @@
config PCIEAER
boolean "Root Port Advanced Error Reporting support"
depends on PCIEPORTBUS
+ select RAS
default y
help
This enables PCI Express Root Port Advanced Error Reporting
diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
index 36ed31b5..35d06e1 100644
--- a/drivers/pci/pcie/aer/aerdrv_errprint.c
+++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
@@ -22,9 +22,7 @@
#include <linux/cper.h>
#include "aerdrv.h"
-
-#define CREATE_TRACE_POINTS
-#include <trace/events/ras.h>
+#include <ras/ras_event.h>
#define AER_AGENT_RECEIVER 0
#define AER_AGENT_REQUESTER 1
diff --git a/drivers/ras/Kconfig b/drivers/ras/Kconfig
new file mode 100644
index 0000000..f9da613
--- /dev/null
+++ b/drivers/ras/Kconfig
@@ -0,0 +1,2 @@
+config RAS
+ bool
diff --git a/drivers/ras/Makefile b/drivers/ras/Makefile
new file mode 100644
index 0000000..d7f7334
--- /dev/null
+++ b/drivers/ras/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_RAS) += ras.o debugfs.o
diff --git a/drivers/ras/debugfs.c b/drivers/ras/debugfs.c
new file mode 100644
index 0000000..0322acf
--- /dev/null
+++ b/drivers/ras/debugfs.c
@@ -0,0 +1,56 @@
+#include <linux/debugfs.h>
+
+static struct dentry *ras_debugfs_dir;
+
+static atomic_t trace_count = ATOMIC_INIT(0);
+
+int ras_userspace_consumers(void)
+{
+ return atomic_read(&trace_count);
+}
+EXPORT_SYMBOL_GPL(ras_userspace_consumers);
+
+static int trace_show(struct seq_file *m, void *v)
+{
+ return atomic_read(&trace_count);
+}
+
+static int trace_open(struct inode *inode, struct file *file)
+{
+ atomic_inc(&trace_count);
+ return single_open(file, trace_show, NULL);
+}
+
+static int trace_release(struct inode *inode, struct file *file)
+{
+ atomic_dec(&trace_count);
+ return single_release(inode, file);
+}
+
+static const struct file_operations trace_fops = {
+ .open = trace_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = trace_release,
+};
+
+int __init ras_add_daemon_trace(void)
+{
+ struct dentry *fentry;
+
+ if (!ras_debugfs_dir)
+ return -ENOENT;
+
+ fentry = debugfs_create_file("daemon_active", S_IRUSR, ras_debugfs_dir,
+ NULL, &trace_fops);
+ if (!fentry)
+ return -ENODEV;
+
+ return 0;
+
+}
+
+void __init ras_debugfs_init(void)
+{
+ ras_debugfs_dir = debugfs_create_dir("ras", NULL);
+}
diff --git a/drivers/ras/ras.c b/drivers/ras/ras.c
new file mode 100644
index 0000000..b67dd36
--- /dev/null
+++ b/drivers/ras/ras.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Chen, Gong <gong.chen@...ux.intel.com>
+ */
+
+#include <linux/init.h>
+#include <linux/ras.h>
+
+#define CREATE_TRACE_POINTS
+#define TRACE_INCLUDE_PATH ../../include/ras
+#include <ras/ras_event.h>
+
+static int __init ras_init(void)
+{
+ int rc = 0;
+
+ ras_debugfs_init();
+ rc = ras_add_daemon_trace();
+
+ return rc;
+}
+subsys_initcall(ras_init);
+
+#if defined(CONFIG_ACPI_EXTLOG) || defined(CONFIG_ACPI_EXTLOG_MODULE)
+EXPORT_TRACEPOINT_SYMBOL_GPL(extlog_mem_event);
+#endif
+EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
index 04f349d..76284bb 100644
--- a/include/acpi/apei.h
+++ b/include/acpi/apei.h
@@ -42,5 +42,9 @@ ssize_t erst_read(u64 record_id, struct cper_record_header *record,
size_t buflen);
int erst_clear(u64 record_id);
+int arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr, void *data);
+void arch_apei_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
+void arch_apei_flush_tlb_one(unsigned long addr);
+
#endif
#endif
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 4dbaa70..c826d1c 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -11,6 +11,8 @@
#define AER_FATAL 1
#define AER_CORRECTABLE 2
+struct pci_dev;
+
struct aer_header_log_regs {
unsigned int dw0;
unsigned int dw1;
diff --git a/include/linux/cper.h b/include/linux/cper.h
index 2fc0ec3..76abba4 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -22,6 +22,7 @@
#define LINUX_CPER_H
#include <linux/uuid.h>
+#include <linux/trace_seq.h>
/* CPER record signature and the size */
#define CPER_SIG_RECORD "CPER"
@@ -36,6 +37,13 @@
#define CPER_RECORD_REV 0x0100
/*
+ * CPER record length contains the CPER fields which are relevant for further
+ * handling of a memory error in userspace (we don't carry all the fields
+ * defined in the UEFI spec because some of them don't make any sense.)
+ * Currently, a length of 256 should be more than enough.
+ */
+#define CPER_REC_LEN 256
+/*
* Severity difinition for error_severity in struct cper_record_header
* and section_severity in struct cper_section_descriptor
*/
@@ -356,6 +364,24 @@ struct cper_sec_mem_err {
__u16 mem_dev_handle; /* module handle in UEFI 2.4 */
};
+struct cper_mem_err_compact {
+ __u64 validation_bits;
+ __u16 node;
+ __u16 card;
+ __u16 module;
+ __u16 bank;
+ __u16 device;
+ __u16 row;
+ __u16 column;
+ __u16 bit_pos;
+ __u64 requestor_id;
+ __u64 responder_id;
+ __u64 target_id;
+ __u16 rank;
+ __u16 mem_array_handle;
+ __u16 mem_dev_handle;
+};
+
struct cper_sec_pcie {
__u64 validation_bits;
__u32 port_type;
@@ -395,7 +421,13 @@ struct cper_sec_pcie {
#pragma pack()
u64 cper_next_record_id(void);
+const char *cper_severity_str(unsigned int);
+const char *cper_mem_err_type_str(unsigned int);
void cper_print_bits(const char *prefix, unsigned int bits,
const char * const strs[], unsigned int strs_size);
+void cper_mem_err_pack(const struct cper_sec_mem_err *,
+ struct cper_mem_err_compact *);
+const char *cper_mem_err_unpack(struct trace_seq *,
+ struct cper_mem_err_compact *);
#endif
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 447775e..1d2a6ab 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -63,4 +63,8 @@ extern int proc_dowatchdog(struct ctl_table *, int ,
void __user *, size_t *, loff_t *);
#endif
+#ifdef CONFIG_HAVE_ACPI_APEI_NMI
+#include <asm/nmi.h>
+#endif
+
#endif
diff --git a/include/linux/ras.h b/include/linux/ras.h
new file mode 100644
index 0000000..2aceeaf
--- /dev/null
+++ b/include/linux/ras.h
@@ -0,0 +1,14 @@
+#ifndef __RAS_H__
+#define __RAS_H__
+
+#ifdef CONFIG_DEBUG_FS
+int ras_userspace_consumers(void);
+void ras_debugfs_init(void);
+int ras_add_daemon_trace(void);
+#else
+static inline int ras_userspace_consumers(void) { return 0; }
+static inline void ras_debugfs_init(void) { return; }
+static inline int ras_add_daemon_trace(void) { return 0; }
+#endif
+
+#endif
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index 21cdb0b..47da53c 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -8,6 +8,71 @@
#include <linux/tracepoint.h>
#include <linux/edac.h>
#include <linux/ktime.h>
+#include <linux/aer.h>
+#include <linux/cper.h>
+
+/*
+ * MCE Extended Error Log trace event
+ *
+ * These events are generated when hardware detects a corrected or
+ * uncorrected event.
+ */
+
+/* memory trace event */
+
+#if defined(CONFIG_ACPI_EXTLOG) || defined(CONFIG_ACPI_EXTLOG_MODULE)
+TRACE_EVENT(extlog_mem_event,
+ TP_PROTO(struct cper_sec_mem_err *mem,
+ u32 err_seq,
+ const uuid_le *fru_id,
+ const char *fru_text,
+ u8 sev),
+
+ TP_ARGS(mem, err_seq, fru_id, fru_text, sev),
+
+ TP_STRUCT__entry(
+ __field(u32, err_seq)
+ __field(u8, etype)
+ __field(u8, sev)
+ __field(u64, pa)
+ __field(u8, pa_mask_lsb)
+ __field_struct(uuid_le, fru_id)
+ __string(fru_text, fru_text)
+ __field_struct(struct cper_mem_err_compact, data)
+ ),
+
+ TP_fast_assign(
+ __entry->err_seq = err_seq;
+ if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE)
+ __entry->etype = mem->error_type;
+ else
+ __entry->etype = ~0;
+ __entry->sev = sev;
+ if (mem->validation_bits & CPER_MEM_VALID_PA)
+ __entry->pa = mem->physical_addr;
+ else
+ __entry->pa = ~0ull;
+
+ if (mem->validation_bits & CPER_MEM_VALID_PA_MASK)
+ __entry->pa_mask_lsb = (u8)__ffs64(mem->physical_addr_mask);
+ else
+ __entry->pa_mask_lsb = ~0;
+ __entry->fru_id = *fru_id;
+ __assign_str(fru_text, fru_text);
+ cper_mem_err_pack(mem, &__entry->data);
+ ),
+
+ TP_printk("{%d} %s error: %s physical addr: %016llx (mask lsb: %x) %sFRU: %pUl %.20s",
+ __entry->err_seq,
+ cper_severity_str(__entry->sev),
+ cper_mem_err_type_str(__entry->etype),
+ __entry->pa,
+ __entry->pa_mask_lsb,
+ cper_mem_err_unpack(p, &__entry->data),
+ &__entry->fru_id,
+ __get_str(fru_text))
+);
+#endif
/*
* Hardware Events Report
@@ -94,6 +159,69 @@ TRACE_EVENT(mc_event,
__get_str(driver_detail))
);
+/*
+ * PCIe AER Trace event
+ *
+ * These events are generated when hardware detects a corrected or
+ * uncorrected event on a PCIe device. The event report has
+ * the following structure:
+ *
+ * char * dev_name - The name of the slot where the device resides
+ * ([domain:]bus:device.function).
+ * u32 status - Either the correctable or uncorrectable register
+ * indicating what error or errors have been seen
+ * u8 severity - error severity 0:NONFATAL 1:FATAL 2:CORRECTED
+ */
+
+#define aer_correctable_errors \
+ {BIT(0), "Receiver Error"}, \
+ {BIT(6), "Bad TLP"}, \
+ {BIT(7), "Bad DLLP"}, \
+ {BIT(8), "RELAY_NUM Rollover"}, \
+ {BIT(12), "Replay Timer Timeout"}, \
+ {BIT(13), "Advisory Non-Fatal"}
+
+#define aer_uncorrectable_errors \
+ {BIT(4), "Data Link Protocol"}, \
+ {BIT(12), "Poisoned TLP"}, \
+ {BIT(13), "Flow Control Protocol"}, \
+ {BIT(14), "Completion Timeout"}, \
+ {BIT(15), "Completer Abort"}, \
+ {BIT(16), "Unexpected Completion"}, \
+ {BIT(17), "Receiver Overflow"}, \
+ {BIT(18), "Malformed TLP"}, \
+ {BIT(19), "ECRC"}, \
+ {BIT(20), "Unsupported Request"}
+
+TRACE_EVENT(aer_event,
+ TP_PROTO(const char *dev_name,
+ const u32 status,
+ const u8 severity),
+
+ TP_ARGS(dev_name, status, severity),
+
+ TP_STRUCT__entry(
+ __string( dev_name, dev_name )
+ __field( u32, status )
+ __field( u8, severity )
+ ),
+
+ TP_fast_assign(
+ __assign_str(dev_name, dev_name);
+ __entry->status = status;
+ __entry->severity = severity;
+ ),
+
+ TP_printk("%s PCIe Bus Error: severity=%s, %s\n",
+ __get_str(dev_name),
+ __entry->severity == AER_CORRECTABLE ? "Corrected" :
+ __entry->severity == AER_FATAL ?
+ "Fatal" : "Uncorrected, non-fatal",
+ __entry->severity == AER_CORRECTABLE ?
+ __print_flags(__entry->status, "|", aer_correctable_errors) :
+ __print_flags(__entry->status, "|", aer_uncorrectable_errors))
+);
+
#endif /* _TRACE_HW_EVENT_MC_H */
/* This part must be outside protection */
diff --git a/include/trace/events/ras.h b/include/trace/events/ras.h
deleted file mode 100644
index 1c875ad..0000000
--- a/include/trace/events/ras.h
+++ /dev/null
@@ -1,77 +0,0 @@
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM ras
-
-#if !defined(_TRACE_AER_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _TRACE_AER_H
-
-#include <linux/tracepoint.h>
-#include <linux/aer.h>
-
-
-/*
- * PCIe AER Trace event
- *
- * These events are generated when hardware detects a corrected or
- * uncorrected event on a PCIe device. The event report has
- * the following structure:
- *
- * char * dev_name - The name of the slot where the device resides
- * ([domain:]bus:device.function).
- * u32 status - Either the correctable or uncorrectable register
- * indicating what error or errors have been seen
- * u8 severity - error severity 0:NONFATAL 1:FATAL 2:CORRECTED
- */
-
-#define aer_correctable_errors \
- {BIT(0), "Receiver Error"}, \
- {BIT(6), "Bad TLP"}, \
- {BIT(7), "Bad DLLP"}, \
- {BIT(8), "RELAY_NUM Rollover"}, \
- {BIT(12), "Replay Timer Timeout"}, \
- {BIT(13), "Advisory Non-Fatal"}
-
-#define aer_uncorrectable_errors \
- {BIT(4), "Data Link Protocol"}, \
- {BIT(12), "Poisoned TLP"}, \
- {BIT(13), "Flow Control Protocol"}, \
- {BIT(14), "Completion Timeout"}, \
- {BIT(15), "Completer Abort"}, \
- {BIT(16), "Unexpected Completion"}, \
- {BIT(17), "Receiver Overflow"}, \
- {BIT(18), "Malformed TLP"}, \
- {BIT(19), "ECRC"}, \
- {BIT(20), "Unsupported Request"}
-
-TRACE_EVENT(aer_event,
- TP_PROTO(const char *dev_name,
- const u32 status,
- const u8 severity),
-
- TP_ARGS(dev_name, status, severity),
-
- TP_STRUCT__entry(
- __string( dev_name, dev_name )
- __field( u32, status )
- __field( u8, severity )
- ),
-
- TP_fast_assign(
- __assign_str(dev_name, dev_name);
- __entry->status = status;
- __entry->severity = severity;
- ),
-
- TP_printk("%s PCIe Bus Error: severity=%s, %s\n",
- __get_str(dev_name),
- __entry->severity == AER_CORRECTABLE ? "Corrected" :
- __entry->severity == AER_FATAL ?
- "Fatal" : "Uncorrected, non-fatal",
- __entry->severity == AER_CORRECTABLE ?
- __print_flags(__entry->status, "|", aer_correctable_errors) :
- __print_flags(__entry->status, "|", aer_uncorrectable_errors))
-);
-
-#endif /* _TRACE_AER_H */
-
-/* This part must be outside protection */
-#include <trace/define_trace.h>
--
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