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-rw-r--r--drivers/acpi/bus.c2
-rw-r--r--drivers/acpi/device_sysfs.c8
-rw-r--r--drivers/acpi/internal.h2
-rw-r--r--drivers/acpi/pptt.c93
4 files changed, 60 insertions, 45 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 0c05ccde1f7a..9531dd0fef50 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1014,7 +1014,7 @@ static int acpi_bus_match(struct device *dev, struct device_driver *drv)
&& !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
}
-static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int acpi_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
}
diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c
index c3aa15571f16..0fbfbaa8d8e3 100644
--- a/drivers/acpi/device_sysfs.c
+++ b/drivers/acpi/device_sysfs.c
@@ -133,7 +133,7 @@ static void acpi_hide_nondev_subnodes(struct acpi_device_data *data)
* -EINVAL: output error
* -ENOMEM: output is truncated
*/
-static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
+static int create_pnp_modalias(const struct acpi_device *acpi_dev, char *modalias,
int size)
{
int len;
@@ -191,7 +191,7 @@ static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
* only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
* ACPI/PNP IDs.
*/
-static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
+static int create_of_modalias(const struct acpi_device *acpi_dev, char *modalias,
int size)
{
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
@@ -239,7 +239,7 @@ static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
return len;
}
-int __acpi_device_uevent_modalias(struct acpi_device *adev,
+int __acpi_device_uevent_modalias(const struct acpi_device *adev,
struct kobj_uevent_env *env)
{
int len;
@@ -277,7 +277,7 @@ int __acpi_device_uevent_modalias(struct acpi_device *adev,
* Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
* hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
*/
-int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
+int acpi_device_uevent_modalias(const struct device *dev, struct kobj_uevent_env *env)
{
return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
}
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index ec584442fb29..06ad497067ac 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -120,7 +120,7 @@ int acpi_bus_register_early_device(int type);
Device Matching and Notification
-------------------------------------------------------------------------- */
struct acpi_device *acpi_companion_match(const struct device *dev);
-int __acpi_device_uevent_modalias(struct acpi_device *adev,
+int __acpi_device_uevent_modalias(const struct acpi_device *adev,
struct kobj_uevent_env *env);
/* --------------------------------------------------------------------------
diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
index c91342dcbcd6..10975bb603fb 100644
--- a/drivers/acpi/pptt.c
+++ b/drivers/acpi/pptt.c
@@ -81,6 +81,7 @@ static inline bool acpi_pptt_match_type(int table_type, int type)
* acpi_pptt_walk_cache() - Attempt to find the requested acpi_pptt_cache
* @table_hdr: Pointer to the head of the PPTT table
* @local_level: passed res reflects this cache level
+ * @split_levels: Number of split cache levels (data/instruction).
* @res: cache resource in the PPTT we want to walk
* @found: returns a pointer to the requested level if found
* @level: the requested cache level
@@ -100,6 +101,7 @@ static inline bool acpi_pptt_match_type(int table_type, int type)
*/
static unsigned int acpi_pptt_walk_cache(struct acpi_table_header *table_hdr,
unsigned int local_level,
+ unsigned int *split_levels,
struct acpi_subtable_header *res,
struct acpi_pptt_cache **found,
unsigned int level, int type)
@@ -113,8 +115,17 @@ static unsigned int acpi_pptt_walk_cache(struct acpi_table_header *table_hdr,
while (cache) {
local_level++;
+ if (!(cache->flags & ACPI_PPTT_CACHE_TYPE_VALID)) {
+ cache = fetch_pptt_cache(table_hdr, cache->next_level_of_cache);
+ continue;
+ }
+
+ if (split_levels &&
+ (acpi_pptt_match_type(cache->attributes, ACPI_PPTT_CACHE_TYPE_DATA) ||
+ acpi_pptt_match_type(cache->attributes, ACPI_PPTT_CACHE_TYPE_INSTR)))
+ *split_levels = local_level;
+
if (local_level == level &&
- cache->flags & ACPI_PPTT_CACHE_TYPE_VALID &&
acpi_pptt_match_type(cache->attributes, type)) {
if (*found != NULL && cache != *found)
pr_warn("Found duplicate cache level/type unable to determine uniqueness\n");
@@ -135,8 +146,8 @@ static unsigned int acpi_pptt_walk_cache(struct acpi_table_header *table_hdr,
static struct acpi_pptt_cache *
acpi_find_cache_level(struct acpi_table_header *table_hdr,
struct acpi_pptt_processor *cpu_node,
- unsigned int *starting_level, unsigned int level,
- int type)
+ unsigned int *starting_level, unsigned int *split_levels,
+ unsigned int level, int type)
{
struct acpi_subtable_header *res;
unsigned int number_of_levels = *starting_level;
@@ -149,7 +160,8 @@ acpi_find_cache_level(struct acpi_table_header *table_hdr,
resource++;
local_level = acpi_pptt_walk_cache(table_hdr, *starting_level,
- res, &ret, level, type);
+ split_levels, res, &ret,
+ level, type);
/*
* we are looking for the max depth. Since its potentially
* possible for a given node to have resources with differing
@@ -165,29 +177,29 @@ acpi_find_cache_level(struct acpi_table_header *table_hdr,
}
/**
- * acpi_count_levels() - Given a PPTT table, and a CPU node, count the caches
+ * acpi_count_levels() - Given a PPTT table, and a CPU node, count the cache
+ * levels and split cache levels (data/instruction).
* @table_hdr: Pointer to the head of the PPTT table
* @cpu_node: processor node we wish to count caches for
+ * @levels: Number of levels if success.
+ * @split_levels: Number of split cache levels (data/instruction) if
+ * success. Can by NULL.
*
* Given a processor node containing a processing unit, walk into it and count
* how many levels exist solely for it, and then walk up each level until we hit
* the root node (ignore the package level because it may be possible to have
- * caches that exist across packages). Count the number of cache levels that
- * exist at each level on the way up.
- *
- * Return: Total number of levels found.
+ * caches that exist across packages). Count the number of cache levels and
+ * split cache levels (data/instruction) that exist at each level on the way
+ * up.
*/
-static int acpi_count_levels(struct acpi_table_header *table_hdr,
- struct acpi_pptt_processor *cpu_node)
+static void acpi_count_levels(struct acpi_table_header *table_hdr,
+ struct acpi_pptt_processor *cpu_node,
+ unsigned int *levels, unsigned int *split_levels)
{
- int total_levels = 0;
-
do {
- acpi_find_cache_level(table_hdr, cpu_node, &total_levels, 0, 0);
+ acpi_find_cache_level(table_hdr, cpu_node, levels, split_levels, 0, 0);
cpu_node = fetch_pptt_node(table_hdr, cpu_node->parent);
} while (cpu_node);
-
- return total_levels;
}
/**
@@ -281,19 +293,6 @@ static struct acpi_pptt_processor *acpi_find_processor_node(struct acpi_table_he
return NULL;
}
-static int acpi_find_cache_levels(struct acpi_table_header *table_hdr,
- u32 acpi_cpu_id)
-{
- int number_of_levels = 0;
- struct acpi_pptt_processor *cpu;
-
- cpu = acpi_find_processor_node(table_hdr, acpi_cpu_id);
- if (cpu)
- number_of_levels = acpi_count_levels(table_hdr, cpu);
-
- return number_of_levels;
-}
-
static u8 acpi_cache_type(enum cache_type type)
{
switch (type) {
@@ -334,7 +333,7 @@ static struct acpi_pptt_cache *acpi_find_cache_node(struct acpi_table_header *ta
while (cpu_node && !found) {
found = acpi_find_cache_level(table_hdr, cpu_node,
- &total_levels, level, acpi_type);
+ &total_levels, NULL, level, acpi_type);
*node = cpu_node;
cpu_node = fetch_pptt_node(table_hdr, cpu_node->parent);
}
@@ -602,32 +601,48 @@ static int check_acpi_cpu_flag(unsigned int cpu, int rev, u32 flag)
}
/**
- * acpi_find_last_cache_level() - Determines the number of cache levels for a PE
+ * acpi_get_cache_info() - Determine the number of cache levels and
+ * split cache levels (data/instruction) and for a PE.
* @cpu: Kernel logical CPU number
+ * @levels: Number of levels if success.
+ * @split_levels: Number of levels being split (i.e. data/instruction)
+ * if success. Can by NULL.
*
* Given a logical CPU number, returns the number of levels of cache represented
* in the PPTT. Errors caused by lack of a PPTT table, or otherwise, return 0
* indicating we didn't find any cache levels.
*
- * Return: Cache levels visible to this core.
+ * Return: -ENOENT if no PPTT table or no PPTT processor struct found.
+ * 0 on success.
*/
-int acpi_find_last_cache_level(unsigned int cpu)
+int acpi_get_cache_info(unsigned int cpu, unsigned int *levels,
+ unsigned int *split_levels)
{
- u32 acpi_cpu_id;
+ struct acpi_pptt_processor *cpu_node;
struct acpi_table_header *table;
- int number_of_levels = 0;
+ u32 acpi_cpu_id;
+
+ *levels = 0;
+ if (split_levels)
+ *split_levels = 0;
table = acpi_get_pptt();
if (!table)
return -ENOENT;
- pr_debug("Cache Setup find last level CPU=%d\n", cpu);
+ pr_debug("Cache Setup: find cache levels for CPU=%d\n", cpu);
acpi_cpu_id = get_acpi_id_for_cpu(cpu);
- number_of_levels = acpi_find_cache_levels(table, acpi_cpu_id);
- pr_debug("Cache Setup find last level level=%d\n", number_of_levels);
+ cpu_node = acpi_find_processor_node(table, acpi_cpu_id);
+ if (!cpu_node)
+ return -ENOENT;
+
+ acpi_count_levels(table, cpu_node, levels, split_levels);
- return number_of_levels;
+ pr_debug("Cache Setup: last_level=%d split_levels=%d\n",
+ *levels, split_levels ? *split_levels : -1);
+
+ return 0;
}
/**
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 21:42:23 +0000