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Message-Id: <3aa5a4fa1f741d85ed57ec48c2fb8788bf3fad9e.1454730659.git.lv.zheng@intel.com>
Date: Sat, 6 Feb 2016 11:53:00 +0800
From: Lv Zheng <lv.zheng@...el.com>
To: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Len Brown <len.brown@...el.com>
Cc: Lv Zheng <lv.zheng@...el.com>, Lv Zheng <zetalog@...il.com>,
<linux-kernel@...r.kernel.org>, linux-acpi@...r.kernel.org,
Bob Moore <robert.moore@...el.com>
Subject: [PATCH 05/14] ACPI 2.0 / AML: Ensure \_SB._INI executed before any _REG
ACPICA commit 8ae25b8d128b6b8509010be321ff6bf2760f3807
ACPICA commit 19f84c249267fab0bfb138bd14d12510fb4faf24
There is BIOS code relying on the fact that \_SB._INI should get evaluated
before any other control methods. This may imply a gap in ACPICA/Linux
initialization/enumeration process.
Before revealing Windows true behavior by more validations, this patch only
ensures \_SB._INI evaluated before any _REG control methods. This can help
to make progress to other initialization order fixes. Lv Zheng.
Link: https://github.com/acpica/acpica/commit/8ae25b8d
Link: https://github.com/acpica/acpica/commit/19f84c24
Signed-off-by: Lv Zheng <lv.zheng@...el.com>
Signed-off-by: Bob Moore <robert.moore@...el.com>
---
drivers/acpi/acpica/acnamesp.h | 2 +-
drivers/acpi/acpica/nsinit.c | 135 ++++++++++++++++++++++++----------------
drivers/acpi/acpica/utxfinit.c | 27 ++------
3 files changed, 86 insertions(+), 78 deletions(-)
diff --git a/drivers/acpi/acpica/acnamesp.h b/drivers/acpi/acpica/acnamesp.h
index 9684ed6..022d69c 100644
--- a/drivers/acpi/acpica/acnamesp.h
+++ b/drivers/acpi/acpica/acnamesp.h
@@ -88,7 +88,7 @@
*/
acpi_status acpi_ns_initialize_objects(void);
-acpi_status acpi_ns_initialize_devices(void);
+acpi_status acpi_ns_initialize_devices(u32 flags);
/*
* nsload - Namespace loading
diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
index bd75d46..f029a3d 100644
--- a/drivers/acpi/acpica/nsinit.c
+++ b/drivers/acpi/acpica/nsinit.c
@@ -46,6 +46,7 @@
#include "acnamesp.h"
#include "acdispat.h"
#include "acinterp.h"
+#include "acevents.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME("nsinit")
@@ -133,82 +134,108 @@ acpi_status acpi_ns_initialize_objects(void)
*
******************************************************************************/
-acpi_status acpi_ns_initialize_devices(void)
+acpi_status acpi_ns_initialize_devices(u32 flags)
{
- acpi_status status;
+ acpi_status status = AE_OK;
struct acpi_device_walk_info info;
ACPI_FUNCTION_TRACE(ns_initialize_devices);
- /* Init counters */
+ if (!(flags & ACPI_NO_DEVICE_INIT)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "[Init] Initializing ACPI Devices\n"));
- info.device_count = 0;
- info.num_STA = 0;
- info.num_INI = 0;
+ /* Init counters */
- ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
- "Initializing Device/Processor/Thermal objects "
- "and executing _INI/_STA methods:\n"));
+ info.device_count = 0;
+ info.num_STA = 0;
+ info.num_INI = 0;
- /* Tree analysis: find all subtrees that contain _INI methods */
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+ "Initializing Device/Processor/Thermal objects "
+ "and executing _INI/_STA methods:\n"));
- status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, FALSE,
- acpi_ns_find_ini_methods, NULL, &info,
- NULL);
- if (ACPI_FAILURE(status)) {
- goto error_exit;
- }
+ /* Tree analysis: find all subtrees that contain _INI methods */
+
+ status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, FALSE,
+ acpi_ns_find_ini_methods, NULL,
+ &info, NULL);
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
+ }
+
+ /* Allocate the evaluation information block */
- /* Allocate the evaluation information block */
+ info.evaluate_info =
+ ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
+ if (!info.evaluate_info) {
+ status = AE_NO_MEMORY;
+ goto error_exit;
+ }
- info.evaluate_info =
- ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
- if (!info.evaluate_info) {
- status = AE_NO_MEMORY;
- goto error_exit;
+ /*
+ * Execute the "global" _INI method that may appear at the root.
+ * This support is provided for Windows compatibility (Vista+) and
+ * is not part of the ACPI specification.
+ */
+ info.evaluate_info->prefix_node = acpi_gbl_root_node;
+ info.evaluate_info->relative_pathname = METHOD_NAME__INI;
+ info.evaluate_info->parameters = NULL;
+ info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+ status = acpi_ns_evaluate(info.evaluate_info);
+ if (ACPI_SUCCESS(status)) {
+ info.num_INI++;
+ }
}
/*
- * Execute the "global" _INI method that may appear at the root. This
- * support is provided for Windows compatibility (Vista+) and is not
- * part of the ACPI specification.
+ * Run all _REG methods
+ *
+ * Note: Any objects accessed by the _REG methods will be automatically
+ * initialized, even if they contain executable AML (see the call to
+ * acpi_ns_initialize_objects below).
*/
- info.evaluate_info->prefix_node = acpi_gbl_root_node;
- info.evaluate_info->relative_pathname = METHOD_NAME__INI;
- info.evaluate_info->parameters = NULL;
- info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
+ if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "[Init] Executing _REG OpRegion methods\n"));
- status = acpi_ns_evaluate(info.evaluate_info);
- if (ACPI_SUCCESS(status)) {
- info.num_INI++;
+ status = acpi_ev_initialize_op_regions();
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
+ }
}
- /* Walk namespace to execute all _INIs on present devices */
+ if (!(flags & ACPI_NO_DEVICE_INIT)) {
- status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, FALSE,
- acpi_ns_init_one_device, NULL, &info,
- NULL);
+ /* Walk namespace to execute all _INIs on present devices */
- /*
- * Any _OSI requests should be completed by now. If the BIOS has
- * requested any Windows OSI strings, we will always truncate
- * I/O addresses to 16 bits -- for Windows compatibility.
- */
- if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
- acpi_gbl_truncate_io_addresses = TRUE;
- }
+ status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, FALSE,
+ acpi_ns_init_one_device, NULL,
+ &info, NULL);
- ACPI_FREE(info.evaluate_info);
- if (ACPI_FAILURE(status)) {
- goto error_exit;
- }
+ /*
+ * Any _OSI requests should be completed by now. If the BIOS has
+ * requested any Windows OSI strings, we will always truncate
+ * I/O addresses to 16 bits -- for Windows compatibility.
+ */
+ if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
+ acpi_gbl_truncate_io_addresses = TRUE;
+ }
- ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
- " Executed %u _INI methods requiring %u _STA executions "
- "(examined %u objects)\n",
- info.num_INI, info.num_STA, info.device_count));
+ ACPI_FREE(info.evaluate_info);
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
+ }
+
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+ " Executed %u _INI methods requiring %u _STA executions "
+ "(examined %u objects)\n",
+ info.num_INI, info.num_STA,
+ info.device_count));
+ }
return_ACPI_STATUS(status);
diff --git a/drivers/acpi/acpica/utxfinit.c b/drivers/acpi/acpica/utxfinit.c
index 2caaec7..6a0c2ee 100644
--- a/drivers/acpi/acpica/utxfinit.c
+++ b/drivers/acpi/acpica/utxfinit.c
@@ -301,33 +301,14 @@ acpi_status __init acpi_initialize_objects(u32 flags)
}
}
- /*
- * Run all _REG methods
- *
- * Note: Any objects accessed by the _REG methods will be automatically
- * initialized, even if they contain executable AML (see the call to
- * acpi_ns_initialize_objects below).
- */
acpi_gbl_reg_methods_enabled = TRUE;
- if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
- ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
- "[Init] Executing _REG OpRegion methods\n"));
-
- status = acpi_ev_initialize_op_regions();
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
/*
- * Initialize all device objects in the namespace. This runs the device
- * _STA and _INI methods.
+ * Initialize all device/region objects in the namespace. This runs
+ * the device _STA and _INI methods and region _REG methods.
*/
- if (!(flags & ACPI_NO_DEVICE_INIT)) {
- ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
- "[Init] Initializing ACPI Devices\n"));
-
- status = acpi_ns_initialize_devices();
+ if (!(flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT))) {
+ status = acpi_ns_initialize_devices(flags);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
--
1.7.10
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