Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
Merge commit. Changes below are compared with the first parent: e2e96c66.
Changes
41 files changed · +1499 −1907
Only the first 600 diff lines are shown. Download the complete patch.
Documentation/acpi/method-customizing.txt
View filediff --git a/Documentation/acpi/method-customizing.txt b/Documentation/acpi/method-customizing.txt
index e628cd2..3e1d25a 100644
--- a/Documentation/acpi/method-customizing.txt
+++ b/Documentation/acpi/method-customizing.txt
@@ -19,6 +19,8 @@ Note: Only ACPI METHOD can be overridden, any other object types like
"Device", "OperationRegion", are not recognized.
Note: The same ACPI control method can be overridden for many times,
and it's always the latest one that used by Linux/kernel.
+Note: To get the ACPI debug object output (Store (AAAA, Debug)),
+ please run "echo 1 > /sys/module/acpi/parameters/aml_debug_output".
1. override an existing method
a) get the ACPI table via ACPI sysfs I/F. e.g. to get the DSDT,
arch/x86/kernel/cpu/mcheck/mce-apei.c
View filediff --git a/arch/x86/kernel/cpu/mcheck/mce-apei.c b/arch/x86/kernel/cpu/mcheck/mce-apei.c
index 745b54f..8209472 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-apei.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-apei.c
@@ -80,7 +80,7 @@ int apei_write_mce(struct mce *m)
rcd.hdr.revision = CPER_RECORD_REV;
rcd.hdr.signature_end = CPER_SIG_END;
rcd.hdr.section_count = 1;
- rcd.hdr.error_severity = CPER_SER_FATAL;
+ rcd.hdr.error_severity = CPER_SEV_FATAL;
/* timestamp, platform_id, partition_id are all invalid */
rcd.hdr.validation_bits = 0;
rcd.hdr.record_length = sizeof(rcd);
@@ -96,7 +96,7 @@ int apei_write_mce(struct mce *m)
rcd.sec_hdr.validation_bits = 0;
rcd.sec_hdr.flags = CPER_SEC_PRIMARY;
rcd.sec_hdr.section_type = CPER_SECTION_TYPE_MCE;
- rcd.sec_hdr.section_severity = CPER_SER_FATAL;
+ rcd.sec_hdr.section_severity = CPER_SEV_FATAL;
memcpy(&rcd.mce, m, sizeof(*m));
drivers/acpi/Kconfig
View filediff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 08e0140..b811f21 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -54,17 +54,10 @@ config ACPI_PROCFS
they have been replaced by functions in /sys.
The deprecated files (and their replacements) include:
- /proc/acpi/sleep (/sys/power/state)
- /proc/acpi/info (/sys/module/acpi/parameters/acpica_version)
- /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
- /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
- /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
- /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)
- /proc/acpi/processor/*/power (/sys/devices/system/cpu/*/cpuidle/*)
- /proc/acpi/processor/*/performance (/sys/devices/system/cpu/*/
- cpufreq/*)
/proc/acpi/processor/*/throttling (/sys/class/thermal/
cooling_device*/*)
+ /proc/acpi/video/*/brightness (/sys/class/backlight/)
+ /proc/acpi/thermal_zone/*/* (/sys/class/thermal/)
This option has no effect on /proc/acpi/ files
and functions which do not yet exist in /sys.
drivers/acpi/Makefile
View filediff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 833b582..3d031d0 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -37,8 +37,9 @@ acpi-y += ec.o
acpi-$(CONFIG_ACPI_DOCK) += dock.o
acpi-y += pci_root.o pci_link.o pci_irq.o pci_bind.o
acpi-y += power.o
-acpi-y += system.o event.o
-acpi-$(CONFIG_ACPI_DEBUG) += debug.o
+acpi-y += event.o
+acpi-y += sysfs.o
+acpi-$(CONFIG_DEBUG_FS) += debugfs.o
acpi-$(CONFIG_ACPI_NUMA) += numa.o
acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o
ifdef CONFIG_ACPI_VIDEO
drivers/acpi/acpica/acevents.h
View filediff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index e0e6aff..36867cd 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -82,6 +82,10 @@ acpi_ev_update_gpe_enable_mask(struct acpi_gpe_event_info *gpe_event_info);
acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info);
+acpi_status acpi_raw_enable_gpe(struct acpi_gpe_event_info *gpe_event_info);
+
+acpi_status acpi_raw_disable_gpe(struct acpi_gpe_event_info *gpe_event_info);
+
struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
u32 gpe_number);
drivers/acpi/acpica/acglobal.h
View filediff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 18e796f..1d19214 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -108,7 +108,7 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_use_default_register_widths, TRUE);
/*
* Optionally enable output from the AML Debug Object.
*/
-u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
+u32 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
/*
* Optionally copy the entire DSDT to local memory (instead of simply
drivers/acpi/acpica/aclocal.h
View filediff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 1ee0bcf..df85b53 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -412,6 +412,7 @@ struct acpi_handler_info {
acpi_event_handler address; /* Address of handler, if any */
void *context; /* Context to be passed to handler */
struct acpi_namespace_node *method_node; /* Method node for this GPE level (saved) */
+ u8 orig_flags; /* Original misc info about this GPE */
};
union acpi_gpe_dispatch_info {
drivers/acpi/acpica/evgpe.c
View filediff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 7a6a3e6..f226eac 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -137,6 +137,79 @@ acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
/*******************************************************************************
*
+ * FUNCTION: acpi_raw_enable_gpe
+ *
+ * PARAMETERS: gpe_event_info - GPE to enable
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
+ * hardware-enabled.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_raw_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
+{
+ acpi_status status = AE_OK;
+
+ if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
+ return_ACPI_STATUS(AE_LIMIT);
+ }
+
+ gpe_event_info->runtime_count++;
+ if (gpe_event_info->runtime_count == 1) {
+ status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
+ if (ACPI_SUCCESS(status)) {
+ status = acpi_ev_enable_gpe(gpe_event_info);
+ }
+
+ if (ACPI_FAILURE(status)) {
+ gpe_event_info->runtime_count--;
+ }
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_raw_disable_gpe
+ *
+ * PARAMETERS: gpe_event_info - GPE to disable
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a reference to a GPE. When the last reference is
+ * removed, the GPE is hardware-disabled.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_raw_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
+{
+ acpi_status status = AE_OK;
+
+ if (!gpe_event_info->runtime_count) {
+ return_ACPI_STATUS(AE_LIMIT);
+ }
+
+ gpe_event_info->runtime_count--;
+ if (!gpe_event_info->runtime_count) {
+ status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
+ if (ACPI_SUCCESS(status)) {
+ status = acpi_hw_low_set_gpe(gpe_event_info,
+ ACPI_GPE_DISABLE);
+ }
+
+ if (ACPI_FAILURE(status)) {
+ gpe_event_info->runtime_count++;
+ }
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_ev_low_get_gpe_info
*
* PARAMETERS: gpe_number - Raw GPE number
drivers/acpi/acpica/evxface.c
View filediff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index 4a531cd..14e48ad 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -691,12 +691,22 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
return_ACPI_STATUS(status);
}
+ /* Allocate memory for the handler object */
+
+ handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info));
+ if (!handler) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
if (!gpe_event_info) {
status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
+ goto free_and_exit;
}
/* Make sure that there isn't a handler there already */
@@ -704,24 +714,30 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_HANDLER) {
status = AE_ALREADY_EXISTS;
- goto unlock_and_exit;
+ goto free_and_exit;
}
/* Allocate and init handler object */
- handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info));
- if (!handler) {
- status = AE_NO_MEMORY;
- goto unlock_and_exit;
- }
-
handler->address = address;
handler->context = context;
handler->method_node = gpe_event_info->dispatch.method_node;
+ handler->orig_flags = gpe_event_info->flags &
+ (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+
+ /*
+ * If the GPE is associated with a method and it cannot wake up the
+ * system from sleep states, it was enabled automatically during
+ * initialization, so it has to be disabled now to avoid spurious
+ * execution of the handler.
+ */
+
+ if ((handler->orig_flags & ACPI_GPE_DISPATCH_METHOD)
+ && !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE))
+ (void)acpi_raw_disable_gpe(gpe_event_info);
/* Install the handler */
- flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
gpe_event_info->dispatch.handler = handler;
/* Setup up dispatch flags to indicate handler (vs. method) */
@@ -735,6 +751,11 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
+
+free_and_exit:
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ ACPI_FREE(handler);
+ goto unlock_and_exit;
}
ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
@@ -770,11 +791,17 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
+ /* Make sure all deferred tasks are completed */
+
+ acpi_os_wait_events_complete(NULL);
+
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
@@ -798,34 +825,34 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
goto unlock_and_exit;
}
- /* Make sure all deferred tasks are completed */
-
- (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
- acpi_os_wait_events_complete(NULL);
- status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
/* Remove the handler */
- flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
handler = gpe_event_info->dispatch.handler;
/* Restore Method node (if any), set dispatch flags */
gpe_event_info->dispatch.method_node = handler->method_node;
- gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */
- if (handler->method_node) {
- gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD;
- }
- acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ gpe_event_info->flags &=
+ ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
+ gpe_event_info->flags |= handler->orig_flags;
+
+ /*
+ * If the GPE was previously associated with a method and it cannot wake
+ * up the system from sleep states, it should be enabled at this point
+ * to restore the post-initialization configuration.
+ */
+
+ if ((handler->orig_flags & ACPI_GPE_DISPATCH_METHOD)
+ && !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE))
+ (void)acpi_raw_enable_gpe(gpe_event_info);
/* Now we can free the handler object */
ACPI_FREE(handler);
- unlock_and_exit:
+unlock_and_exit:
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
}
drivers/acpi/acpica/evxfevnt.c
View filediff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
index 0ec900d..3048255 100644
--- a/drivers/acpi/acpica/evxfevnt.c
+++ b/drivers/acpi/acpica/evxfevnt.c
@@ -294,7 +294,7 @@ ACPI_EXPORT_SYMBOL(acpi_gpe_wakeup)
******************************************************************************/
acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
{
- acpi_status status = AE_OK;
+ acpi_status status = AE_BAD_PARAMETER;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
@@ -305,28 +305,10 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
- if (!gpe_event_info) {
- status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
+ if (gpe_event_info) {
+ status = acpi_raw_enable_gpe(gpe_event_info);
}
- if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
- status = AE_LIMIT; /* Too many references */
- goto unlock_and_exit;
- }
-
- gpe_event_info->runtime_count++;
- if (gpe_event_info->runtime_count == 1) {
- status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
- if (ACPI_SUCCESS(status)) {
- status = acpi_ev_enable_gpe(gpe_event_info);
- }
- if (ACPI_FAILURE(status)) {
- gpe_event_info->runtime_count--;
- }
- }
-
-unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
@@ -348,7 +330,7 @@ ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
******************************************************************************/
acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
{
- acpi_status status = AE_OK;
+ acpi_status status = AE_BAD_PARAMETER;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
@@ -359,32 +341,10 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
- if (!gpe_event_info) {
- status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
- }
-
- /* Hardware-disable a runtime GPE on removal of the last reference */
-
- if (!gpe_event_info->runtime_count) {
- status = AE_LIMIT; /* There are no references to remove */
- goto unlock_and_exit;
+ if (gpe_event_info) {
+ status = acpi_raw_disable_gpe(gpe_event_info) ;
}
- gpe_event_info->runtime_count--;
- if (!gpe_event_info->runtime_count) {
- status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
- if (ACPI_SUCCESS(status)) {
- status =
- acpi_hw_low_set_gpe(gpe_event_info,
- ACPI_GPE_DISABLE);
- }
- if (ACPI_FAILURE(status)) {
- gpe_event_info->runtime_count++;
- }
- }
-
-unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
@@ -411,7 +371,6 @@ acpi_status acpi_gpe_can_wake(acpi_handle gpe_device, u32 gpe_number)
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
acpi_cpu_flags flags;
- u8 disable = 0;
ACPI_FUNCTION_TRACE(acpi_gpe_can_wake);
@@ -430,15 +389,12 @@ acpi_status acpi_gpe_can_wake(acpi_handle gpe_device, u32 gpe_number)
}
gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
- disable = (gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)
- && gpe_event_info->runtime_count;
+ if (gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD) {
+ (void)acpi_raw_disable_gpe(gpe_event_info);
+ }
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
-
- if (disable)
- status = acpi_disable_gpe(gpe_device, gpe_number);
-
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_gpe_can_wake)
drivers/acpi/acpica/utmutex.c
View filediff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c
index 058b3df..f5cca3a 100644
--- a/drivers/acpi/acpica/utmutex.c
+++ b/drivers/acpi/acpica/utmutex.c
@@ -279,13 +279,10 @@ acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id)
{
- acpi_thread_id this_thread_id;
-
ACPI_FUNCTION_NAME(ut_release_mutex);
- this_thread_id = acpi_os_get_thread_id();
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Thread %p releasing Mutex [%s]\n",
- ACPI_CAST_PTR(void, this_thread_id),
+ ACPI_CAST_PTR(void, acpi_os_get_thread_id()),
acpi_ut_get_mutex_name(mutex_id)));
if (mutex_id > ACPI_MAX_MUTEX) {
drivers/acpi/apei/Kconfig
View filediff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index f8c668f..907e350 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -28,3 +28,12 @@ config ACPI_APEI_EINJ
EINJ provides a hardware error injection mechanism, it is
mainly used for debugging and testing the other parts of
APEI and some other RAS features.
+
+config ACPI_APEI_ERST_DEBUG
+ tristate "APEI Error Record Serialization Table (ERST) Debug Support"
+ depends on ACPI_APEI
+ help
+ ERST is a way provided by APEI to save and retrieve hardware
+ error infomation to and from a persistent store. Enable this
+ if you want to debugging and testing the ERST kernel support
+ and firmware implementation.
drivers/acpi/apei/Makefile
View filediff --git a/drivers/acpi/apei/Makefile b/drivers/acpi/apei/Makefile
index b13b03a..d1d1bc0 100644
--- a/drivers/acpi/apei/Makefile
+++ b/drivers/acpi/apei/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_ACPI_APEI) += apei.o
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 cper.o erst.o
drivers/acpi/apei/apei-base.c
View filediff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index 216e1e9..73fd0c7 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -482,14 +482,14 @@ err_unmap_ioport:
list_for_each_entry(res, &resources->ioport, list) {
if (res == res_bak)
break;
- release_mem_region(res->start, res->end - res->start);
+ release_region(res->start, res->end - res->start);
}
res_bak = NULL;
err_unmap_iomem:
list_for_each_entry(res, &resources->iomem, list) {
if (res == res_bak)
break;
- release_region(res->start, res->end - res->start);
+ release_mem_region(res->start, res->end - res->start);
}
return -EINVAL;
}
drivers/acpi/apei/erst-dbg.c
View filediff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
new file mode 100644
index 0000000..5281ddd
--- /dev/null
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -0,0 +1,207 @@
+/*
+ * APEI Error Record Serialization Table debug support
+ *
+ * ERST is a way provided by APEI to save and retrieve hardware error
+ * infomation to and from a persistent store. This file provide the
+ * debugging/testing support for ERST kernel support and firmware
+ * implementation.
+ *
+ * Copyright 2010 Intel Corp.
+ * Author: Huang Ying <[email protected]>
+ *
+ * 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/uaccess.h>
+#include <acpi/apei.h>
+#include <linux/miscdevice.h>
+
+#include "apei-internal.h"
+
+#define ERST_DBG_PFX "ERST DBG: "
+
+#define ERST_DBG_RECORD_LEN_MAX 4096
+
+static void *erst_dbg_buf;
+static unsigned int erst_dbg_buf_len;
+
+/* Prevent erst_dbg_read/write from being invoked concurrently */
+static DEFINE_MUTEX(erst_dbg_mutex);
+
+static int erst_dbg_open(struct inode *inode, struct file *file)
+{
+ if (erst_disable)
+ return -ENODEV;
+
+ return nonseekable_open(inode, file);
+}
+
+static long erst_dbg_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+{
+ int rc;
+ u64 record_id;
+ u32 record_count;
+
+ switch (cmd) {
+ case APEI_ERST_CLEAR_RECORD:
+ rc = copy_from_user(&record_id, (void __user *)arg,
+ sizeof(record_id));
+ if (rc)
+ return -EFAULT;
+ return erst_clear(record_id);
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drivers/acpi/apei/ghes.c
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drivers/acpi/apei/hest.c
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drivers/acpi/bus.c
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drivers/acpi/debug.c
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drivers/acpi/debugfs.c
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drivers/acpi/glue.c
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drivers/acpi/internal.h
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drivers/acpi/numa.c
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drivers/acpi/osl.c
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drivers/acpi/power.c
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drivers/acpi/proc.c
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drivers/acpi/processor_driver.c
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drivers/acpi/processor_idle.c
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drivers/acpi/processor_thermal.c
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drivers/acpi/processor_throttling.c
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drivers/acpi/sleep.c
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drivers/acpi/sleep.h
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drivers/acpi/sysfs.c
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drivers/acpi/system.c
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drivers/acpi/thermal.c
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drivers/acpi/video.c
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drivers/acpi/wakeup.c
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drivers/ata/libata-acpi.c
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include/acpi/acpixf.h
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include/acpi/processor.h
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include/linux/cper.h
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