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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-01 15:51:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-01 15:51:46 -0700
commitb9394d8a657cd3c064fa432aa0905c1b58b38fe9 (patch)
tree5a0c98370f313fa11693ab72eea0dc809fd6567d /include
parent126de6b20bfb82cc19012d5048f11f339ae5a021 (diff)
parent7b2dd6d2c4db3912771bfcfd7ac7264011a3c831 (diff)
Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/efi changes from Peter Anvin: "The bulk of these changes are cleaning up the efivars handling and breaking it up into a tree of files. There are a number of fixes as well. The entire changeset is pretty big, but most of it is code movement. Several of these commits are quite new; the history got very messed up due to a mismerge with the urgent changes for rc8 which completely broke IA64, and so Ingo requested that we rebase it to straighten it out." * 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi: remove "kfree(NULL)" efi: locking fix in efivar_entry_set_safe() efi, pstore: Read data from variable store before memcpy() efi, pstore: Remove entry from list when erasing efi, pstore: Initialise 'entry' before iterating efi: split efisubsystem from efivars efivarfs: Move to fs/efivarfs efivars: Move pstore code into the new EFI directory efivars: efivar_entry API efivars: Keep a private global pointer to efivars efi: move utf16 string functions to efi.h x86, efi: Make efi_memblock_x86_reserve_range more readable efivarfs: convert to use simple_open()
Diffstat (limited to 'include')
-rw-r--r--include/linux/efi.h90
1 files changed, 82 insertions, 8 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 3d7df3d32c66..2bc0ad78d058 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -670,6 +670,12 @@ static inline int efi_enabled(int facility)
EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
EFI_VARIABLE_APPEND_WRITE)
/*
+ * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"))
+ * not including trailing NUL
+ */
+#define EFI_VARIABLE_GUID_LEN 36
+
+/*
* The type of search to perform when calling boottime->locate_handle
*/
#define EFI_LOCATE_ALL_HANDLES 0
@@ -726,7 +732,6 @@ static inline void memrange_efi_to_native(u64 *addr, u64 *npages)
*addr &= PAGE_MASK;
}
-#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
/*
* EFI Variable support.
*
@@ -752,19 +757,88 @@ struct efivars {
* which is protected by the BKL, so that path is safe.
*/
spinlock_t lock;
- struct list_head list;
struct kset *kset;
struct kobject *kobject;
- struct bin_attribute *new_var, *del_var;
const struct efivar_operations *ops;
- struct efivar_entry *walk_entry;
- struct pstore_info efi_pstore_info;
};
-int register_efivars(struct efivars *efivars,
+/*
+ * The maximum size of VariableName + Data = 1024
+ * Therefore, it's reasonable to save that much
+ * space in each part of the structure,
+ * and we use a page for reading/writing.
+ */
+
+struct efi_variable {
+ efi_char16_t VariableName[1024/sizeof(efi_char16_t)];
+ efi_guid_t VendorGuid;
+ unsigned long DataSize;
+ __u8 Data[1024];
+ efi_status_t Status;
+ __u32 Attributes;
+} __attribute__((packed));
+
+struct efivar_entry {
+ struct efi_variable var;
+ struct list_head list;
+ struct kobject kobj;
+};
+
+extern struct list_head efivar_sysfs_list;
+
+static inline void
+efivar_unregister(struct efivar_entry *var)
+{
+ kobject_put(&var->kobj);
+}
+
+int efivars_register(struct efivars *efivars,
const struct efivar_operations *ops,
- struct kobject *parent_kobj);
-void unregister_efivars(struct efivars *efivars);
+ struct kobject *kobject);
+int efivars_unregister(struct efivars *efivars);
+struct kobject *efivars_kobject(void);
+
+int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
+ void *data, bool atomic, bool duplicates,
+ struct list_head *head);
+
+void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
+void efivar_entry_remove(struct efivar_entry *entry);
+
+int __efivar_entry_delete(struct efivar_entry *entry);
+int efivar_entry_delete(struct efivar_entry *entry);
+
+int efivar_entry_size(struct efivar_entry *entry, unsigned long *size);
+int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
+ unsigned long *size, void *data);
+int efivar_entry_get(struct efivar_entry *entry, u32 *attributes,
+ unsigned long *size, void *data);
+int efivar_entry_set(struct efivar_entry *entry, u32 attributes,
+ unsigned long size, void *data, struct list_head *head);
+int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes,
+ unsigned long *size, void *data, bool *set);
+int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes,
+ bool block, unsigned long size, void *data);
+
+void efivar_entry_iter_begin(void);
+void efivar_entry_iter_end(void);
+
+int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
+ struct list_head *head, void *data,
+ struct efivar_entry **prev);
+int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
+ struct list_head *head, void *data);
+
+struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid,
+ struct list_head *head, bool remove);
+
+bool efivar_validate(struct efi_variable *var, u8 *data, unsigned long len);
+
+extern struct work_struct efivar_work;
+void efivar_run_worker(void);
+
+#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
+int efivars_sysfs_init(void);
#endif /* CONFIG_EFI_VARS */