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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

Browse Source 
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  gcc-4.6: ACPI: fix unused but set variables in ACPI
  ACPI thermal: make procfs I/F depend on CONFIG_ACPI_PROCFS
  ACPI video: make procfs I/F depend on CONFIG_ACPI_PROCFS
  ACPI processor: remove deprecated ACPI procfs I/F
  ACPI power_resource: remove unused procfs I/F
  ACPI: remove deprecated ACPI procfs I/F
  ACPI: introduce drivers/acpi/sysfs.c
  ACPI: introduce module parameter acpi.aml_debug_output
  ACPI: introduce drivers/acpi/debugfs.c
  ACPI, APEI, ERST debug support
  ACPI, APEI, Manage GHES as platform devices
  ACPI, APEI, Rename CPER and GHES severity constants
  ACPI, APEI, Fix a typo of error path of apei_resources_request
  ACPI / ACPICA: Fix reference counting problems with GPE handlers
  ACPI: Add the check of ADR flag in course of finding ACPI handle for PCI device
  ACPI / Sleep: Drop acpi_suspend_finish()
  ACPI / Sleep: Consolidate suspend and hibernation routines
  ACPI / Wakeup: Simplify enabling of wakeup devices
  ACPI / Sleep: Rework enabling wakeup devices
  ACPI / Sleep: Free NVS copy if suspending of devices fails

Fixed up totally buggered "ACPI: fix unused but set variables in ACPI"
patch that doesn't even compile in the merge.

Thanks to Sedat Dilek <sedat.dilek@googlemail.com> for noticing the
breakage before I even pulled.  And a big "Grrr.." at Len for not even
bothering to compile the tree before asking me to pull.
This commit is contained in:
Linus Torvalds
2010-08-15 17:37:07 -07:00
parent e2e96c6636 95ee46aa86
commit 2245ba2a3a
40 changed files with 1087 additions and 1495 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/acpi/method-customizing.txt
View File

@@ -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,

4
arch/x86/kernel/cpu/mcheck/mce-apei.c
View File

@@ -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));

11
drivers/acpi/Kconfig
View File

@@ -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.

5
drivers/acpi/Makefile
View File

@@ -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

4
drivers/acpi/acpica/acevents.h
View File

@@ -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);

2
drivers/acpi/acpica/acglobal.h
View File

@@ -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

1
drivers/acpi/acpica/aclocal.h
View File

@@ -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 {

73
drivers/acpi/acpica/evgpe.c
View File

@@ -135,6 +135,79 @@ 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

95
drivers/acpi/acpica/evxface.c
View File

@@ -691,23 +691,7 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
return_ACPI_STATUS(status);
}
/* 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;
}
/* Make sure that there isn't a handler there already */
if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_HANDLER) {
status = AE_ALREADY_EXISTS;
goto unlock_and_exit;
}
/* Allocate and init handler object */
/* Allocate memory for the handler object */
handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info));
if (!handler) {
@@ -715,13 +699,45 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
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 free_and_exit;
}
/* Make sure that there isn't a handler there already */
if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_HANDLER) {
status = AE_ALREADY_EXISTS;
goto free_and_exit;
}
/* Allocate and init handler object */
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);
}

62
drivers/acpi/acpica/evxfevnt.c
View File

@@ -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;
if (gpe_event_info) {
status = acpi_raw_disable_gpe(gpe_event_info) ;
}
/* 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;
}
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)

5
drivers/acpi/acpica/utmutex.c
View File

@@ -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) {

9
drivers/acpi/apei/Kconfig
View File

@@ -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.

1
drivers/acpi/apei/Makefile
View File

@@ -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

4
drivers/acpi/apei/apei-base.c
View File

@@ -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;
}

207
drivers/acpi/apei/erst-dbg.c Normal file
View File

@@ -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 <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/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);
case APEI_ERST_GET_RECORD_COUNT:
rc = erst_get_record_count();
if (rc < 0)
return rc;
record_count = rc;
rc = put_user(record_count, (u32 __user *)arg);
if (rc)
return rc;
return 0;
default:
return -ENOTTY;
}
}
static ssize_t erst_dbg_read(struct file *filp, char __user *ubuf,
size_t usize, loff_t *off)
{
int rc;
ssize_t len = 0;
u64 id;
if (*off != 0)
return -EINVAL;
if (mutex_lock_interruptible(&erst_dbg_mutex) != 0)
return -EINTR;
retry_next:
rc = erst_get_next_record_id(&id);
if (rc)
goto out;
/* no more record */
if (id == APEI_ERST_INVALID_RECORD_ID)
goto out;
retry:
rc = len = erst_read(id, erst_dbg_buf, erst_dbg_buf_len);
/* The record may be cleared by others, try read next record */
if (rc == -ENOENT)
goto retry_next;
if (rc < 0)
goto out;
if (len > ERST_DBG_RECORD_LEN_MAX) {
pr_warning(ERST_DBG_PFX
"Record (ID: 0x%llx) length is too long: %zd\n",
id, len);
rc = -EIO;
goto out;
}
if (len > erst_dbg_buf_len) {
kfree(erst_dbg_buf);
rc = -ENOMEM;
erst_dbg_buf = kmalloc(len, GFP_KERNEL);
if (!erst_dbg_buf)
goto out;
erst_dbg_buf_len = len;
goto retry;
}
rc = -EINVAL;
if (len > usize)
goto out;
rc = -EFAULT;
if (copy_to_user(ubuf, erst_dbg_buf, len))
goto out;
rc = 0;
out:
mutex_unlock(&erst_dbg_mutex);
return rc ? rc : len;
}
static ssize_t erst_dbg_write(struct file *filp, const char __user *ubuf,
size_t usize, loff_t *off)
{
int rc;
struct cper_record_header *rcd;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (usize > ERST_DBG_RECORD_LEN_MAX) {
pr_err(ERST_DBG_PFX "Too long record to be written\n");
return -EINVAL;
}
if (mutex_lock_interruptible(&erst_dbg_mutex))
return -EINTR;
if (usize > erst_dbg_buf_len) {
kfree(erst_dbg_buf);
rc = -ENOMEM;
erst_dbg_buf = kmalloc(usize, GFP_KERNEL);
if (!erst_dbg_buf)
goto out;
erst_dbg_buf_len = usize;
}
rc = copy_from_user(erst_dbg_buf, ubuf, usize);
if (rc) {
rc = -EFAULT;
goto out;
}
rcd = erst_dbg_buf;
rc = -EINVAL;
if (rcd->record_length != usize)
goto out;
rc = erst_write(erst_dbg_buf);
out:
mutex_unlock(&erst_dbg_mutex);
return rc < 0 ? rc : usize;
}
static const struct file_operations erst_dbg_ops = {
.owner = THIS_MODULE,
.open = erst_dbg_open,
.read = erst_dbg_read,
.write = erst_dbg_write,
.unlocked_ioctl = erst_dbg_ioctl,
};
static struct miscdevice erst_dbg_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "erst_dbg",
.fops = &erst_dbg_ops,
};
static __init int erst_dbg_init(void)
{
return misc_register(&erst_dbg_dev);
}
static __exit void erst_dbg_exit(void)
{
misc_deregister(&erst_dbg_dev);
kfree(erst_dbg_buf);
}
module_init(erst_dbg_init);
module_exit(erst_dbg_exit);
MODULE_AUTHOR("Huang Ying");
MODULE_DESCRIPTION("APEI Error Record Serialization Table debug support");
MODULE_LICENSE("GPL");

184
drivers/acpi/apei/ghes.c
View File

@@ -41,6 +41,8 @@
#include <linux/interrupt.h>
#include <linux/cper.h>
#include <linux/kdebug.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <acpi/apei.h>
#include <acpi/atomicio.h>
#include <acpi/hed.h>
@@ -87,6 +89,7 @@ struct ghes {
* used for that.
*/
static LIST_HEAD(ghes_sci);
static DEFINE_MUTEX(ghes_list_mutex);
static struct ghes *ghes_new(struct acpi_hest_generic *generic)
{
@@ -132,26 +135,26 @@ static void ghes_fini(struct ghes *ghes)
}
enum {
GHES_SER_NO = 0x0,
GHES_SER_CORRECTED = 0x1,
GHES_SER_RECOVERABLE = 0x2,
GHES_SER_PANIC = 0x3,
GHES_SEV_NO = 0x0,
GHES_SEV_CORRECTED = 0x1,
GHES_SEV_RECOVERABLE = 0x2,
GHES_SEV_PANIC = 0x3,
};
static inline int ghes_severity(int severity)
{
switch (severity) {
case CPER_SER_INFORMATIONAL:
return GHES_SER_NO;
case CPER_SER_CORRECTED:
return GHES_SER_CORRECTED;
case CPER_SER_RECOVERABLE:
return GHES_SER_RECOVERABLE;
case CPER_SER_FATAL:
return GHES_SER_PANIC;
case CPER_SEV_INFORMATIONAL:
return GHES_SEV_NO;
case CPER_SEV_CORRECTED:
return GHES_SEV_CORRECTED;
case CPER_SEV_RECOVERABLE:
return GHES_SEV_RECOVERABLE;
case CPER_SEV_FATAL:
return GHES_SEV_PANIC;
default:
/* Unkown, go panic */
return GHES_SER_PANIC;
return GHES_SEV_PANIC;
}
}
@@ -237,16 +240,16 @@ static void ghes_clear_estatus(struct ghes *ghes)
static void ghes_do_proc(struct ghes *ghes)
{
int ser, processed = 0;
int sev, processed = 0;
struct acpi_hest_generic_data *gdata;
ser = ghes_severity(ghes->estatus->error_severity);
sev = ghes_severity(ghes->estatus->error_severity);
apei_estatus_for_each_section(ghes->estatus, gdata) {
#ifdef CONFIG_X86_MCE
if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
CPER_SEC_PLATFORM_MEM)) {
apei_mce_report_mem_error(
ser == GHES_SER_CORRECTED,
sev == GHES_SEV_CORRECTED,
(struct cper_sec_mem_err *)(gdata+1));
processed = 1;
}
@@ -293,18 +296,15 @@ static struct notifier_block ghes_notifier_sci = {
.notifier_call = ghes_notify_sci,
};
static int hest_ghes_parse(struct acpi_hest_header *hest_hdr, void *data)
static int __devinit ghes_probe(struct platform_device *ghes_dev)
{
struct acpi_hest_generic *generic;
struct ghes *ghes = NULL;
int rc = 0;
int rc = -EINVAL;
if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR)
return 0;
generic = (struct acpi_hest_generic *)hest_hdr;
generic = ghes_dev->dev.platform_data;
if (!generic->enabled)
return 0;
return -ENODEV;
if (generic->error_block_length <
sizeof(struct acpi_hest_generic_status)) {
@@ -327,62 +327,91 @@ static int hest_ghes_parse(struct acpi_hest_header *hest_hdr, void *data)
ghes = NULL;
goto err;
}
switch (generic->notify.type) {
case ACPI_HEST_NOTIFY_POLLED:
pr_warning(GHES_PFX
"Generic hardware error source: %d notified via POLL is not supported!\n",
generic->header.source_id);
break;
case ACPI_HEST_NOTIFY_EXTERNAL:
case ACPI_HEST_NOTIFY_LOCAL:
pr_warning(GHES_PFX
"Generic hardware error source: %d notified via IRQ is not supported!\n",
generic->header.source_id);
break;
case ACPI_HEST_NOTIFY_SCI:
if (generic->notify.type == ACPI_HEST_NOTIFY_SCI) {
mutex_lock(&ghes_list_mutex);
if (list_empty(&ghes_sci))
register_acpi_hed_notifier(&ghes_notifier_sci);
list_add_rcu(&ghes->list, &ghes_sci);
break;
case ACPI_HEST_NOTIFY_NMI:
pr_warning(GHES_PFX
"Generic hardware error source: %d notified via NMI is not supported!\n",
generic->header.source_id);
break;
default:
pr_warning(FW_WARN GHES_PFX
"Unknown notification type: %u for generic hardware error source: %d\n",
generic->notify.type, generic->header.source_id);
break;
mutex_unlock(&ghes_list_mutex);
} else {
unsigned char *notify = NULL;
switch (generic->notify.type) {
case ACPI_HEST_NOTIFY_POLLED:
notify = "POLL";
break;
case ACPI_HEST_NOTIFY_EXTERNAL:
case ACPI_HEST_NOTIFY_LOCAL:
notify = "IRQ";
break;
case ACPI_HEST_NOTIFY_NMI:
notify = "NMI";
break;
}
if (notify) {
pr_warning(GHES_PFX
"Generic hardware error source: %d notified via %s is not supported!\n",
generic->header.source_id, notify);
} else {
pr_warning(FW_WARN GHES_PFX
"Unknown notification type: %u for generic hardware error source: %d\n",
generic->notify.type, generic->header.source_id);
}
rc = -ENODEV;
goto err;
}
platform_set_drvdata(ghes_dev, ghes);
return 0;
err:
if (ghes)
ghes_fini(ghes);
return rc;
}
static void ghes_cleanup(void)
{
struct ghes *ghes, *nghes;
if (!list_empty(&ghes_sci))
unregister_acpi_hed_notifier(&ghes_notifier_sci);
synchronize_rcu();
list_for_each_entry_safe(ghes, nghes, &ghes_sci, list) {
list_del(&ghes->list);
if (ghes) {
ghes_fini(ghes);
kfree(ghes);
}
return rc;
}
static int __devexit ghes_remove(struct platform_device *ghes_dev)
{
struct ghes *ghes;
struct acpi_hest_generic *generic;
ghes = platform_get_drvdata(ghes_dev);
generic = ghes->generic;
switch (generic->notify.type) {
case ACPI_HEST_NOTIFY_SCI:
mutex_lock(&ghes_list_mutex);
list_del_rcu(&ghes->list);
if (list_empty(&ghes_sci))
unregister_acpi_hed_notifier(&ghes_notifier_sci);
mutex_unlock(&ghes_list_mutex);
break;
default:
BUG();
break;
}
synchronize_rcu();
ghes_fini(ghes);
kfree(ghes);
platform_set_drvdata(ghes_dev, NULL);
return 0;
}
static struct platform_driver ghes_platform_driver = {
.driver = {
.name = "GHES",
.owner = THIS_MODULE,
},
.probe = ghes_probe,
.remove = ghes_remove,
};
static int __init ghes_init(void)
{
int rc;
if (acpi_disabled)
return -ENODEV;
@@ -391,32 +420,12 @@ static int __init ghes_init(void)
return -EINVAL;
}
rc = apei_hest_parse(hest_ghes_parse, NULL);
if (rc) {
pr_err(GHES_PFX
"Error during parsing HEST generic hardware error sources.\n");
goto err_cleanup;
}
if (list_empty(&ghes_sci)) {
pr_info(GHES_PFX
"No functional generic hardware error sources.\n");
rc = -ENODEV;
goto err_cleanup;
}
pr_info(GHES_PFX
"Generic Hardware Error Source support is initialized.\n");
return 0;
err_cleanup:
ghes_cleanup();
return rc;
return platform_driver_register(&ghes_platform_driver);
}
static void __exit ghes_exit(void)
{
ghes_cleanup();
platform_driver_unregister(&ghes_platform_driver);
}
module_init(ghes_init);
@@ -425,3 +434,4 @@ module_exit(ghes_exit);
MODULE_AUTHOR("Huang Ying");
MODULE_DESCRIPTION("APEI Generic Hardware Error Source support");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:GHES");

76
drivers/acpi/apei/hest.c
View File

@@ -34,6 +34,7 @@
#include <linux/kdebug.h>
#include <linux/highmem.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <acpi/apei.h>
#include "apei-internal.h"
@@ -47,11 +48,6 @@ EXPORT_SYMBOL_GPL(hest_disable);
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,
@@ -125,6 +121,69 @@ int apei_hest_parse(apei_hest_func_t func, void *data)
}
EXPORT_SYMBOL_GPL(apei_hest_parse);
struct ghes_arr {
struct platform_device **ghes_devs;
unsigned int count;
};
static int hest_parse_ghes_count(struct acpi_hest_header *hest_hdr, void *data)
{
int *count = data;
if (hest_hdr->type == ACPI_HEST_TYPE_GENERIC_ERROR)
(*count)++;
return 0;
}
static int hest_parse_ghes(struct acpi_hest_header *hest_hdr, void *data)
{
struct acpi_hest_generic *generic;
struct platform_device *ghes_dev;
struct ghes_arr *ghes_arr = data;
int rc;
if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR)
return 0;
generic = (struct acpi_hest_generic *)hest_hdr;
if (!generic->enabled)
return 0;
ghes_dev = platform_device_alloc("GHES", hest_hdr->source_id);
if (!ghes_dev)
return -ENOMEM;
ghes_dev->dev.platform_data = generic;
rc = platform_device_add(ghes_dev);
if (rc)
goto err;
ghes_arr->ghes_devs[ghes_arr->count++] = ghes_dev;
return 0;
err:
platform_device_put(ghes_dev);
return rc;
}
static int hest_ghes_dev_register(unsigned int ghes_count)
{
int rc, i;
struct ghes_arr ghes_arr;
ghes_arr.count = 0;
ghes_arr.ghes_devs = kmalloc(sizeof(void *) * ghes_count, GFP_KERNEL);
if (!ghes_arr.ghes_devs)
return -ENOMEM;
rc = apei_hest_parse(hest_parse_ghes, &ghes_arr);
if (rc)
goto err;
out:
kfree(ghes_arr.ghes_devs);
return rc;
err:
for (i = 0; i < ghes_arr.count; i++)
platform_device_unregister(ghes_arr.ghes_devs[i]);
goto out;
}
static int __init setup_hest_disable(char *str)
{
hest_disable = 1;
@@ -137,6 +196,7 @@ static int __init hest_init(void)
{
acpi_status status;
int rc = -ENODEV;
unsigned int ghes_count = 0;
if (acpi_disabled)
goto err;
@@ -158,7 +218,11 @@ static int __init hest_init(void)
goto err;
}
rc = apei_hest_parse(hest_void_parse, NULL);
rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
if (rc)
goto err;
rc = hest_ghes_dev_register(ghes_count);
if (rc)
goto err;

4
drivers/acpi/bus.c
View File

@@ -1034,8 +1034,8 @@ static int __init acpi_init(void)
acpi_scan_init();
acpi_ec_init();
acpi_power_init();
acpi_system_init();
acpi_debug_init();
acpi_sysfs_init();
acpi_debugfs_init();
acpi_sleep_proc_init();
acpi_wakeup_device_init();
return result;

422
drivers/acpi/debug.c
View File

@@ -1,422 +0,0 @@
/*
* debug.c - ACPI debug interface to userspace.
*/
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <acpi/acpi_drivers.h>
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debug");
struct acpi_dlayer {
const char *name;
unsigned long value;
};
struct acpi_dlevel {
const char *name;
unsigned long value;
};
#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
static const struct acpi_dlayer acpi_debug_layers[] = {
ACPI_DEBUG_INIT(ACPI_UTILITIES),
ACPI_DEBUG_INIT(ACPI_HARDWARE),
ACPI_DEBUG_INIT(ACPI_EVENTS),
ACPI_DEBUG_INIT(ACPI_TABLES),
ACPI_DEBUG_INIT(ACPI_NAMESPACE),
ACPI_DEBUG_INIT(ACPI_PARSER),
ACPI_DEBUG_INIT(ACPI_DISPATCHER),
ACPI_DEBUG_INIT(ACPI_EXECUTER),
ACPI_DEBUG_INIT(ACPI_RESOURCES),
ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
ACPI_DEBUG_INIT(ACPI_COMPILER),
ACPI_DEBUG_INIT(ACPI_TOOLS),
ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
};
static const struct acpi_dlevel acpi_debug_levels[] = {
ACPI_DEBUG_INIT(ACPI_LV_INIT),
ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
ACPI_DEBUG_INIT(ACPI_LV_INFO),
ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
ACPI_DEBUG_INIT(ACPI_LV_PARSE),
ACPI_DEBUG_INIT(ACPI_LV_LOAD),
ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
ACPI_DEBUG_INIT(ACPI_LV_EXEC),
ACPI_DEBUG_INIT(ACPI_LV_NAMES),
ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
ACPI_DEBUG_INIT(ACPI_LV_TABLES),
ACPI_DEBUG_INIT(ACPI_LV_VALUES),
ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
ACPI_DEBUG_INIT(ACPI_LV_THREADS),
ACPI_DEBUG_INIT(ACPI_LV_IO),
ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
};
/* --------------------------------------------------------------------------
FS Interface (/sys)
-------------------------------------------------------------------------- */
static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
{
int result = 0;
int i;
result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
acpi_debug_layers[i].name,
acpi_debug_layers[i].value,
(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
}
result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
ACPI_ALL_DRIVERS,
(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
return result;
}
static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
{
int result = 0;
int i;
result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
acpi_debug_levels[i].name,
acpi_debug_levels[i].value,
(acpi_dbg_level & acpi_debug_levels[i].
value) ? '*' : ' ');
}
result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
acpi_dbg_level);
return result;
}
static struct kernel_param_ops acpi_debug_layer_ops = {
.set = param_set_uint,
.get = param_get_debug_layer,
};
static struct kernel_param_ops acpi_debug_level_ops = {
.set = param_set_uint,
.get = param_get_debug_level,
};
module_param_cb(debug_layer, &acpi_debug_layer_ops, &acpi_dbg_layer, 0644);
module_param_cb(debug_level, &acpi_debug_level_ops, &acpi_dbg_level, 0644);
static char trace_method_name[6];
module_param_string(trace_method_name, trace_method_name, 6, 0644);
static unsigned int trace_debug_layer;
module_param(trace_debug_layer, uint, 0644);
static unsigned int trace_debug_level;
module_param(trace_debug_level, uint, 0644);
static int param_set_trace_state(const char *val, const struct kernel_param *kp)
{
int result = 0;
if (!strncmp(val, "enable", strlen("enable") - 1)) {
result = acpi_debug_trace(trace_method_name, trace_debug_level,
trace_debug_layer, 0);
if (result)
result = -EBUSY;
goto exit;
}
if (!strncmp(val, "disable", strlen("disable") - 1)) {
int name = 0;
result = acpi_debug_trace((char *)&name, trace_debug_level,
trace_debug_layer, 0);
if (result)
result = -EBUSY;
goto exit;
}
if (!strncmp(val, "1", 1)) {
result = acpi_debug_trace(trace_method_name, trace_debug_level,
trace_debug_layer, 1);
if (result)
result = -EBUSY;
goto exit;
}
result = -EINVAL;
exit:
return result;
}
static int param_get_trace_state(char *buffer, const struct kernel_param *kp)
{
if (!acpi_gbl_trace_method_name)
return sprintf(buffer, "disable");
else {
if (acpi_gbl_trace_flags & 1)
return sprintf(buffer, "1");
else
return sprintf(buffer, "enable");
}
return 0;
}
static struct kernel_param_ops param_ops_trace_state = {
.set = param_set_trace_state,
.get = param_get_trace_state,
};
module_param_cb(trace_state, &param_ops_trace_state, NULL, 0644);
/* --------------------------------------------------------------------------
DebugFS Interface
-------------------------------------------------------------------------- */
static ssize_t cm_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
static char *buf;
static int uncopied_bytes;
struct acpi_table_header table;
acpi_status status;
if (!(*ppos)) {
/* parse the table header to get the table length */
if (count <= sizeof(struct acpi_table_header))
return -EINVAL;
if (copy_from_user(&table, user_buf,
sizeof(struct acpi_table_header)))
return -EFAULT;
uncopied_bytes = table.length;
buf = kzalloc(uncopied_bytes, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
if (uncopied_bytes < count) {
kfree(buf);
return -EINVAL;
}
if (copy_from_user(buf + (*ppos), user_buf, count)) {
kfree(buf);
return -EFAULT;
}
uncopied_bytes -= count;
*ppos += count;
if (!uncopied_bytes) {
status = acpi_install_method(buf);
kfree(buf);
if (ACPI_FAILURE(status))
return -EINVAL;
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
}
return count;
}
static const struct file_operations cm_fops = {
.write = cm_write,
};
static int acpi_debugfs_init(void)
{
struct dentry *acpi_dir, *cm_dentry;
acpi_dir = debugfs_create_dir("acpi", NULL);
if (!acpi_dir)
goto err;
cm_dentry = debugfs_create_file("custom_method", S_IWUGO,
acpi_dir, NULL, &cm_fops);
if (!cm_dentry)
goto err;
return 0;
err:
if (acpi_dir)
debugfs_remove(acpi_dir);
return -EINVAL;
}
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS
#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
static int acpi_system_debug_proc_show(struct seq_file *m, void *v)
{
unsigned int i;
seq_printf(m, "%-25s\tHex SET\n", "Description");
switch ((unsigned long)m->private) {
case 0:
for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
seq_printf(m, "%-25s\t0x%08lX [%c]\n",
acpi_debug_layers[i].name,
acpi_debug_layers[i].value,
(acpi_dbg_layer & acpi_debug_layers[i].
value) ? '*' : ' ');
}
seq_printf(m, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
ACPI_ALL_DRIVERS,
(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
ACPI_ALL_DRIVERS) ==
0 ? ' ' : '-');
seq_printf(m,
"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
acpi_dbg_layer);
break;
case 1:
for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
seq_printf(m, "%-25s\t0x%08lX [%c]\n",
acpi_debug_levels[i].name,
acpi_debug_levels[i].value,
(acpi_dbg_level & acpi_debug_levels[i].
value) ? '*' : ' ');
}
seq_printf(m, "--\ndebug_level = 0x%08X (* = enabled)\n",
acpi_dbg_level);
break;
}
return 0;
}
static int acpi_system_debug_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, acpi_system_debug_proc_show, PDE(inode)->data);
}
static ssize_t acpi_system_debug_proc_write(struct file *file,
const char __user * buffer,
size_t count, loff_t *pos)
{
char debug_string[12] = { '\0' };
if (count > sizeof(debug_string) - 1)
return -EINVAL;
if (copy_from_user(debug_string, buffer, count))
return -EFAULT;
debug_string[count] = '\0';
switch ((unsigned long)PDE(file->f_path.dentry->d_inode)->data) {
case 0:
acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
break;
case 1:
acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
break;
default:
return -EINVAL;
}
return count;
}
static const struct file_operations acpi_system_debug_proc_fops = {
.owner = THIS_MODULE,
.open = acpi_system_debug_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = acpi_system_debug_proc_write,
};
#endif
int __init acpi_procfs_init(void)
{
#ifdef CONFIG_ACPI_PROCFS
struct proc_dir_entry *entry;
int error = 0;
char *name;
/* 'debug_layer' [R/W] */
name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
acpi_root_dir, &acpi_system_debug_proc_fops,
(void *)0);
if (!entry)
goto Error;
/* 'debug_level' [R/W] */
name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
acpi_root_dir, &acpi_system_debug_proc_fops,
(void *)1);
if (!entry)
goto Error;
Done:
return error;
Error:
remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
error = -ENODEV;
goto Done;
#else
return 0;
#endif
}
int __init acpi_debug_init(void)
{
acpi_debugfs_init();
acpi_procfs_init();
return 0;
}

93
drivers/acpi/debugfs.c Normal file
View File

@@ -0,0 +1,93 @@
/*
* debugfs.c - ACPI debugfs interface to userspace.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <acpi/acpi_drivers.h>
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debugfs");
/* /sys/modules/acpi/parameters/aml_debug_output */
module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
bool, 0644);
MODULE_PARM_DESC(aml_debug_output,
"To enable/disable the ACPI Debug Object output.");
/* /sys/kernel/debug/acpi/custom_method */
static ssize_t cm_write(struct file *file, const char __user * user_buf,
size_t count, loff_t *ppos)
{
static char *buf;
static int uncopied_bytes;
struct acpi_table_header table;
acpi_status status;
if (!(*ppos)) {
/* parse the table header to get the table length */
if (count <= sizeof(struct acpi_table_header))
return -EINVAL;
if (copy_from_user(&table, user_buf,
sizeof(struct acpi_table_header)))
return -EFAULT;
uncopied_bytes = table.length;
buf = kzalloc(uncopied_bytes, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
if (uncopied_bytes < count) {
kfree(buf);
return -EINVAL;
}
if (copy_from_user(buf + (*ppos), user_buf, count)) {
kfree(buf);
return -EFAULT;
}
uncopied_bytes -= count;
*ppos += count;
if (!uncopied_bytes) {
status = acpi_install_method(buf);
kfree(buf);
if (ACPI_FAILURE(status))
return -EINVAL;
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
}
return count;
}
static const struct file_operations cm_fops = {
.write = cm_write,
};
int __init acpi_debugfs_init(void)
{
struct dentry *acpi_dir, *cm_dentry;
acpi_dir = debugfs_create_dir("acpi", NULL);
if (!acpi_dir)
goto err;
cm_dentry = debugfs_create_file("custom_method", S_IWUGO,
acpi_dir, NULL, &cm_fops);
if (!cm_dentry)
goto err;
return 0;
err:
if (acpi_dir)
debugfs_remove(acpi_dir);
return -EINVAL;
}

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