diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/acpi.h | 5 | ||||
| -rw-r--r-- | include/linux/arch_topology.h | 1 | ||||
| -rw-r--r-- | include/linux/cacheinfo.h | 3 | ||||
| -rw-r--r-- | include/linux/cpumask.h | 18 | ||||
| -rw-r--r-- | include/linux/device.h | 2 | ||||
| -rw-r--r-- | include/linux/device/driver.h | 2 | ||||
| -rw-r--r-- | include/linux/firmware/trusted_foundations.h | 8 | ||||
| -rw-r--r-- | include/linux/fwnode.h | 4 | ||||
| -rw-r--r-- | include/linux/kernfs.h | 59 |
9 files changed, 92 insertions, 10 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 7e7a33b6c8d7..f6d4539c3895 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1431,7 +1431,6 @@ int find_acpi_cpu_topology(unsigned int cpu, int level); int find_acpi_cpu_topology_cluster(unsigned int cpu); int find_acpi_cpu_topology_package(unsigned int cpu); int find_acpi_cpu_topology_hetero_id(unsigned int cpu); -int find_acpi_cpu_cache_topology(unsigned int cpu, int level); #else static inline int acpi_pptt_cpu_is_thread(unsigned int cpu) { @@ -1453,10 +1452,6 @@ static inline int find_acpi_cpu_topology_hetero_id(unsigned int cpu) { return -EINVAL; } -static inline int find_acpi_cpu_cache_topology(unsigned int cpu, int level) -{ - return -EINVAL; -} #endif #ifdef CONFIG_ACPI_PCC diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h index 58cbe18d825c..a07b510e7dc5 100644 --- a/include/linux/arch_topology.h +++ b/include/linux/arch_topology.h @@ -68,7 +68,6 @@ struct cpu_topology { int core_id; int cluster_id; int package_id; - int llc_id; cpumask_t thread_sibling; cpumask_t core_sibling; cpumask_t cluster_sibling; diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h index 4ff37cb763ae..00b7a6ae8617 100644 --- a/include/linux/cacheinfo.h +++ b/include/linux/cacheinfo.h @@ -82,6 +82,9 @@ struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu); int init_cache_level(unsigned int cpu); int populate_cache_leaves(unsigned int cpu); int cache_setup_acpi(unsigned int cpu); +bool last_level_cache_is_valid(unsigned int cpu); +bool last_level_cache_is_shared(unsigned int cpu_x, unsigned int cpu_y); +int detect_cache_attributes(unsigned int cpu); #ifndef CONFIG_ACPI_PPTT /* * acpi_find_last_cache_level is only called on ACPI enabled diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index fe29ac7cc469..4592d0845941 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -1071,4 +1071,22 @@ cpumap_print_list_to_buf(char *buf, const struct cpumask *mask, [0] = 1UL \ } } +/* + * Provide a valid theoretical max size for cpumap and cpulist sysfs files + * to avoid breaking userspace which may allocate a buffer based on the size + * reported by e.g. fstat. + * + * for cpumap NR_CPUS * 9/32 - 1 should be an exact length. + * + * For cpulist 7 is (ceil(log10(NR_CPUS)) + 1) allowing for NR_CPUS to be up + * to 2 orders of magnitude larger than 8192. And then we divide by 2 to + * cover a worst-case of every other cpu being on one of two nodes for a + * very large NR_CPUS. + * + * Use PAGE_SIZE as a minimum for smaller configurations. + */ +#define CPUMAP_FILE_MAX_BYTES ((((NR_CPUS * 9)/32 - 1) > PAGE_SIZE) \ + ? (NR_CPUS * 9)/32 - 1 : PAGE_SIZE) +#define CPULIST_FILE_MAX_BYTES (((NR_CPUS * 7)/2 > PAGE_SIZE) ? (NR_CPUS * 7)/2 : PAGE_SIZE) + #endif /* __LINUX_CPUMASK_H */ diff --git a/include/linux/device.h b/include/linux/device.h index dc941997795c..424b55df0272 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -905,6 +905,8 @@ struct device *device_find_child(struct device *dev, void *data, int (*match)(struct device *dev, void *data)); struct device *device_find_child_by_name(struct device *parent, const char *name); +struct device *device_find_any_child(struct device *parent); + int device_rename(struct device *dev, const char *new_name); int device_move(struct device *dev, struct device *new_parent, enum dpm_order dpm_order); diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h index 700453017e1c..7acaabde5396 100644 --- a/include/linux/device/driver.h +++ b/include/linux/device/driver.h @@ -129,6 +129,7 @@ extern struct device_driver *driver_find(const char *name, struct bus_type *bus); extern int driver_probe_done(void); extern void wait_for_device_probe(void); +void __init wait_for_init_devices_probe(void); /* sysfs interface for exporting driver attributes */ @@ -241,7 +242,6 @@ driver_find_device_by_acpi_dev(struct device_driver *drv, const void *adev) extern int driver_deferred_probe_timeout; void driver_deferred_probe_add(struct device *dev); -int driver_deferred_probe_check_state(struct device *dev); void driver_init(void); /** diff --git a/include/linux/firmware/trusted_foundations.h b/include/linux/firmware/trusted_foundations.h index be5984bda592..931b6c5c72df 100644 --- a/include/linux/firmware/trusted_foundations.h +++ b/include/linux/firmware/trusted_foundations.h @@ -71,12 +71,16 @@ static inline void register_trusted_foundations( static inline void of_register_trusted_foundations(void) { + struct device_node *np = of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations"); + + if (!np) + return; + of_node_put(np); /* * If we find the target should enable TF but does not support it, * fail as the system won't be able to do much anyway */ - if (of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations")) - register_trusted_foundations(NULL); + register_trusted_foundations(NULL); } static inline bool trusted_foundations_registered(void) diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 9a81c4410b9f..89b9bdfca925 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -27,11 +27,15 @@ struct device; * driver needs its child devices to be bound with * their respective drivers as soon as they are * added. + * BEST_EFFORT: The fwnode/device needs to probe early and might be missing some + * suppliers. Only enforce ordering with suppliers that have + * drivers. */ #define FWNODE_FLAG_LINKS_ADDED BIT(0) #define FWNODE_FLAG_NOT_DEVICE BIT(1) #define FWNODE_FLAG_INITIALIZED BIT(2) #define FWNODE_FLAG_NEEDS_CHILD_BOUND_ON_ADD BIT(3) +#define FWNODE_FLAG_BEST_EFFORT BIT(4) struct fwnode_handle { struct fwnode_handle *secondary; diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index e2ae15a6225e..367044d7708c 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -18,6 +18,7 @@ #include <linux/uidgid.h> #include <linux/wait.h> #include <linux/rwsem.h> +#include <linux/cache.h> struct file; struct dentry; @@ -34,6 +35,62 @@ struct kernfs_fs_context; struct kernfs_open_node; struct kernfs_iattrs; +/* + * NR_KERNFS_LOCK_BITS determines size (NR_KERNFS_LOCKS) of hash + * table of locks. + * Having a small hash table would impact scalability, since + * more and more kernfs_node objects will end up using same lock + * and having a very large hash table would waste memory. + * + * At the moment size of hash table of locks is being set based on + * the number of CPUs as follows: + * + * NR_CPU NR_KERNFS_LOCK_BITS NR_KERNFS_LOCKS + * 1 1 2 + * 2-3 2 4 + * 4-7 4 16 + * 8-15 6 64 + * 16-31 8 256 + * 32 and more 10 1024 + * + * The above relation between NR_CPU and number of locks is based + * on some internal experimentation which involved booting qemu + * with different values of smp, performing some sysfs operations + * on all CPUs and observing how increase in number of locks impacts + * completion time of these sysfs operations on each CPU. + */ +#ifdef CONFIG_SMP +#define NR_KERNFS_LOCK_BITS (2 * (ilog2(NR_CPUS < 32 ? NR_CPUS : 32))) +#else +#define NR_KERNFS_LOCK_BITS 1 +#endif + +#define NR_KERNFS_LOCKS (1 << NR_KERNFS_LOCK_BITS) + +/* + * There's one kernfs_open_file for each open file and one kernfs_open_node + * for each kernfs_node with one or more open files. + * + * filp->private_data points to seq_file whose ->private points to + * kernfs_open_file. + * + * kernfs_open_files are chained at kernfs_open_node->files, which is + * protected by kernfs_global_locks.open_file_mutex[i]. + * + * To reduce possible contention in sysfs access, arising due to single + * locks, use an array of locks (e.g. open_file_mutex) and use kernfs_node + * object address as hash keys to get the index of these locks. + * + * Hashed mutexes are safe to use here because operations using these don't + * rely on global exclusion. + * + * In future we intend to replace other global locks with hashed ones as well. + * kernfs_global_locks acts as a holder for all such hash tables. + */ +struct kernfs_global_locks { + struct mutex open_file_mutex[NR_KERNFS_LOCKS]; +}; + enum kernfs_node_type { KERNFS_DIR = 0x0001, KERNFS_FILE = 0x0002, @@ -114,7 +171,7 @@ struct kernfs_elem_symlink { struct kernfs_elem_attr { const struct kernfs_ops *ops; - struct kernfs_open_node *open; + struct kernfs_open_node __rcu *open; loff_t size; struct kernfs_node *notify_next; /* for kernfs_notify() */ }; |