#define arch_efi_call_virt_setup() efi_virtmap_load()
#define arch_efi_call_virt_teardown() efi_virtmap_unload()
-#define arch_efi_call_virt(p, f, args...) \
-({ \
- efi_##f##_t *__f; \
- __f = p->f; \
- __f(args); \
-})
-
#define ARCH_EFI_IRQ_FLAGS_MASK \
(PSR_J_BIT | PSR_E_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | \
PSR_T_BIT | MODE_MASK)
__efi_fpsimd_begin(); \
})
+#undef arch_efi_call_virt
#define arch_efi_call_virt(p, f, args...) \
-({ \
- efi_##f##_t *__f; \
- __f = p->f; \
- __efi_rt_asm_wrapper(__f, #f, args); \
-})
+ __efi_rt_asm_wrapper((p)->f, #f, args)
#define arch_efi_call_virt_teardown() \
({ \
"initrd not fully accessible via the linear mapping -- please check your bootloader ...\n")) {
phys_initrd_size = 0;
} else {
- memblock_remove(base, size); /* clear MEMBLOCK_ flags */
memblock_add(base, size);
+ memblock_clear_nomap(base, size);
memblock_reserve(base, size);
}
}
#define ARCH_EFI_IRQ_FLAGS_MASK 0x00000004 /* Bit 2: CSR.CRMD.IE */
-#define arch_efi_call_virt_setup() \
-({ \
-})
-
-#define arch_efi_call_virt(p, f, args...) \
-({ \
- efi_##f##_t * __f; \
- __f = p->f; \
- __f(args); \
-})
-
-#define arch_efi_call_virt_teardown() \
-({ \
-})
+#define arch_efi_call_virt_setup()
+#define arch_efi_call_virt_teardown()
#define EFI_ALLOC_ALIGN SZ_64K
#define arch_efi_call_virt_setup() efi_virtmap_load()
#define arch_efi_call_virt_teardown() efi_virtmap_unload()
-#define arch_efi_call_virt(p, f, args...) p->f(args)
-
#define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)
/* Load initrd anywhere in system RAM */
efi_fpu_end(); \
})
-#define arch_efi_call_virt(p, f, args...) p->f(args)
-
#else /* !CONFIG_X86_32 */
#define EFI_LOADER_SIGNATURE "EL64"
efi_enter_mm(); \
})
+#undef arch_efi_call_virt
#define arch_efi_call_virt(p, f, args...) ({ \
u64 ret, ibt = ibt_save(); \
ret = efi_call((void *)p->f, args); \
extern bool efi_reboot_required(void);
extern bool efi_is_table_address(unsigned long phys_addr);
-extern void efi_find_mirror(void);
extern void efi_reserve_boot_services(void);
#else
static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
{
return false;
}
-static inline void efi_find_mirror(void)
-{
-}
static inline void efi_reserve_boot_services(void)
{
}
}
early_param("add_efi_memmap", setup_add_efi_memmap);
-void __init efi_find_mirror(void)
-{
- efi_memory_desc_t *md;
- u64 mirror_size = 0, total_size = 0;
-
- if (!efi_enabled(EFI_MEMMAP))
- return;
-
- for_each_efi_memory_desc(md) {
- unsigned long long start = md->phys_addr;
- unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
-
- total_size += size;
- if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
- memblock_mark_mirror(start, size);
- mirror_size += size;
- }
- }
- if (mirror_size)
- pr_info("Memory: %lldM/%lldM mirrored memory\n",
- mirror_size>>20, total_size>>20);
-}
-
/*
* Tell the kernel about the EFI memory map. This might include
* more than the max 128 entries that can fit in the passed in e820
config ACPI_VIOT
bool
+config ACPI_PRMT
+ bool "Platform Runtime Mechanism Support"
+ depends on EFI && (X86_64 || ARM64)
+ default y
+ help
+ Platform Runtime Mechanism (PRM) is a firmware interface exposing a
+ set of binary executables that can be called from the AML interpreter
+ or directly from device drivers.
+
+ Say Y to enable the AML interpreter to execute the PRM code.
+
+ While this feature is optional in principle, leaving it out may
+ substantially increase computational overhead related to the
+ initialization of some server systems.
+
endif # ACPI
config X86_PM_TIMER
You should nearly always say Y here because many modern
systems require this timer.
-
-config ACPI_PRMT
- bool "Platform Runtime Mechanism Support"
- depends on EFI && X86_64
- default y
- help
- Platform Runtime Mechanism (PRM) is a firmware interface exposing a
- set of binary executables that can be called from the AML interpreter
- or directly from device drivers.
-
- Say Y to enable the AML interpreter to execute the PRM code.
-
- While this feature is optional in principle, leaving it out may
- substantially increase computational overhead related to the
- initialization of some server systems.
struct prm_handler_info {
guid_t guid;
- u64 handler_addr;
+ void *handler_addr;
u64 static_data_buffer_addr;
u64 acpi_param_buffer_addr;
th = &tm->handlers[cur_handler];
guid_copy(&th->guid, (guid_t *)handler_info->handler_guid);
- th->handler_addr = efi_pa_va_lookup(handler_info->handler_address);
+ th->handler_addr = (void *)efi_pa_va_lookup(handler_info->handler_address);
th->static_data_buffer_addr = efi_pa_va_lookup(handler_info->static_data_buffer_address);
th->acpi_param_buffer_addr = efi_pa_va_lookup(handler_info->acpi_param_buffer_address);
} while (++cur_handler < tm->handler_count && (handler_info = get_next_handler(handler_info)));
config EFI_VARS_PSTORE
tristate "Register efivars backend for pstore"
depends on PSTORE
+ select UCS2_STRING
default y
help
Say Y here to enable use efivars as a backend to pstore. This
config EFI_BOOTLOADER_CONTROL
tristate "EFI Bootloader Control"
+ select UCS2_STRING
default n
help
This module installs a reboot hook, such that if reboot() is
* And now, memblock is fully populated, it is time to do capping.
*/
early_init_dt_check_for_usable_mem_range();
+ efi_find_mirror();
efi_esrt_init();
efi_mokvar_table_init();
#include <linux/slab.h>
#include <linux/ucs2_string.h>
+MODULE_IMPORT_NS(EFIVAR);
+
#define DUMP_NAME_LEN 66
#define EFIVARS_DATA_SIZE_MAX 1024
EFI_VARIABLE_BOOTSERVICE_ACCESS | \
EFI_VARIABLE_RUNTIME_ACCESS)
-static LIST_HEAD(efi_pstore_list);
-static DECLARE_WORK(efivar_work, NULL);
-
static int efi_pstore_open(struct pstore_info *psi)
{
- psi->data = NULL;
+ int err;
+
+ err = efivar_lock();
+ if (err)
+ return err;
+
+ psi->data = kzalloc(EFIVARS_DATA_SIZE_MAX, GFP_KERNEL);
+ if (!psi->data)
+ return -ENOMEM;
+
return 0;
}
static int efi_pstore_close(struct pstore_info *psi)
{
- psi->data = NULL;
+ efivar_unlock();
+ kfree(psi->data);
return 0;
}
return (timestamp * 100 + part) * 1000 + count;
}
-static int efi_pstore_read_func(struct efivar_entry *entry,
- struct pstore_record *record)
+static int efi_pstore_read_func(struct pstore_record *record,
+ efi_char16_t *varname)
{
- efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
+ unsigned long wlen, size = EFIVARS_DATA_SIZE_MAX;
char name[DUMP_NAME_LEN], data_type;
- int i;
+ efi_status_t status;
int cnt;
unsigned int part;
- unsigned long size;
u64 time;
- if (efi_guidcmp(entry->var.VendorGuid, vendor))
- return 0;
-
- for (i = 0; i < DUMP_NAME_LEN; i++)
- name[i] = entry->var.VariableName[i];
+ ucs2_as_utf8(name, varname, DUMP_NAME_LEN);
if (sscanf(name, "dump-type%u-%u-%d-%llu-%c",
&record->type, &part, &cnt, &time, &data_type) == 5) {
} else
return 0;
- entry->var.DataSize = 1024;
- __efivar_entry_get(entry, &entry->var.Attributes,
- &entry->var.DataSize, entry->var.Data);
- size = entry->var.DataSize;
- memcpy(record->buf, entry->var.Data,
- (size_t)min_t(unsigned long, EFIVARS_DATA_SIZE_MAX, size));
-
- return size;
-}
-
-/**
- * efi_pstore_scan_sysfs_enter
- * @pos: scanning entry
- * @next: next entry
- * @head: list head
- */
-static void efi_pstore_scan_sysfs_enter(struct efivar_entry *pos,
- struct efivar_entry *next,
- struct list_head *head)
-{
- pos->scanning = true;
- if (&next->list != head)
- next->scanning = true;
-}
-
-/**
- * __efi_pstore_scan_sysfs_exit
- * @entry: deleting entry
- * @turn_off_scanning: Check if a scanning flag should be turned off
- */
-static inline int __efi_pstore_scan_sysfs_exit(struct efivar_entry *entry,
- bool turn_off_scanning)
-{
- if (entry->deleting) {
- list_del(&entry->list);
- efivar_entry_iter_end();
- kfree(entry);
- if (efivar_entry_iter_begin())
- return -EINTR;
- } else if (turn_off_scanning)
- entry->scanning = false;
-
- return 0;
-}
-
-/**
- * efi_pstore_scan_sysfs_exit
- * @pos: scanning entry
- * @next: next entry
- * @head: list head
- * @stop: a flag checking if scanning will stop
- */
-static int efi_pstore_scan_sysfs_exit(struct efivar_entry *pos,
- struct efivar_entry *next,
- struct list_head *head, bool stop)
-{
- int ret = __efi_pstore_scan_sysfs_exit(pos, true);
-
- if (ret)
- return ret;
-
- if (stop)
- ret = __efi_pstore_scan_sysfs_exit(next, &next->list != head);
- return ret;
-}
+ record->buf = kmalloc(size, GFP_KERNEL);
+ if (!record->buf)
+ return -ENOMEM;
-/**
- * efi_pstore_sysfs_entry_iter
- *
- * @record: pstore record to pass to callback
- *
- * You MUST call efivar_entry_iter_begin() before this function, and
- * efivar_entry_iter_end() afterwards.
- *
- */
-static int efi_pstore_sysfs_entry_iter(struct pstore_record *record)
-{
- struct efivar_entry **pos = (struct efivar_entry **)&record->psi->data;
- struct efivar_entry *entry, *n;
- struct list_head *head = &efi_pstore_list;
- int size = 0;
- int ret;
-
- if (!*pos) {
- list_for_each_entry_safe(entry, n, head, list) {
- efi_pstore_scan_sysfs_enter(entry, n, head);
-
- size = efi_pstore_read_func(entry, record);
- ret = efi_pstore_scan_sysfs_exit(entry, n, head,
- size < 0);
- if (ret)
- return ret;
- if (size)
- break;
- }
- *pos = n;
- return size;
+ status = efivar_get_variable(varname, &LINUX_EFI_CRASH_GUID, NULL,
+ &size, record->buf);
+ if (status != EFI_SUCCESS) {
+ kfree(record->buf);
+ return -EIO;
}
- list_for_each_entry_safe_from((*pos), n, head, list) {
- efi_pstore_scan_sysfs_enter((*pos), n, head);
-
- size = efi_pstore_read_func((*pos), record);
- ret = efi_pstore_scan_sysfs_exit((*pos), n, head, size < 0);
- if (ret)
- return ret;
- if (size)
- break;
+ /*
+ * Store the name of the variable in the pstore_record priv field, so
+ * we can reuse it later if we need to delete the EFI variable from the
+ * variable store.
+ */
+ wlen = (ucs2_strnlen(varname, DUMP_NAME_LEN) + 1) * sizeof(efi_char16_t);
+ record->priv = kmemdup(varname, wlen, GFP_KERNEL);
+ if (!record->priv) {
+ kfree(record->buf);
+ return -ENOMEM;
}
- *pos = n;
+
return size;
}
-/**
- * efi_pstore_read
- *
- * This function returns a size of NVRAM entry logged via efi_pstore_write().
- * The meaning and behavior of efi_pstore/pstore are as below.
- *
- * size > 0: Got data of an entry logged via efi_pstore_write() successfully,
- * and pstore filesystem will continue reading subsequent entries.
- * size == 0: Entry was not logged via efi_pstore_write(),
- * and efi_pstore driver will continue reading subsequent entries.
- * size < 0: Failed to get data of entry logging via efi_pstore_write(),
- * and pstore will stop reading entry.
- */
static ssize_t efi_pstore_read(struct pstore_record *record)
{
- ssize_t size;
+ efi_char16_t *varname = record->psi->data;
+ efi_guid_t guid = LINUX_EFI_CRASH_GUID;
+ unsigned long varname_size;
+ efi_status_t status;
- record->buf = kzalloc(EFIVARS_DATA_SIZE_MAX, GFP_KERNEL);
- if (!record->buf)
- return -ENOMEM;
+ for (;;) {
+ varname_size = EFIVARS_DATA_SIZE_MAX;
- if (efivar_entry_iter_begin()) {
- size = -EINTR;
- goto out;
- }
- size = efi_pstore_sysfs_entry_iter(record);
- efivar_entry_iter_end();
+ /*
+ * If this is the first read() call in the pstore enumeration,
+ * varname will be the empty string, and the GetNextVariable()
+ * runtime service call will return the first EFI variable in
+ * its own enumeration order, ignoring the guid argument.
+ *
+ * Subsequent calls to GetNextVariable() must pass the name and
+ * guid values returned by the previous call, which is why we
+ * store varname in record->psi->data. Given that we only
+ * enumerate variables with the efi-pstore GUID, there is no
+ * need to record the guid return value.
+ */
+ status = efivar_get_next_variable(&varname_size, varname, &guid);
+ if (status == EFI_NOT_FOUND)
+ return 0;
-out:
- if (size <= 0) {
- kfree(record->buf);
- record->buf = NULL;
+ if (status != EFI_SUCCESS)
+ return -EIO;
+
+ /* skip variables that don't concern us */
+ if (efi_guidcmp(guid, LINUX_EFI_CRASH_GUID))
+ continue;
+
+ return efi_pstore_read_func(record, varname);
}
- return size;
}
static int efi_pstore_write(struct pstore_record *record)
{
char name[DUMP_NAME_LEN];
efi_char16_t efi_name[DUMP_NAME_LEN];
- efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
- int i, ret = 0;
+ efi_status_t status;
+ int i;
record->id = generic_id(record->time.tv_sec, record->part,
record->count);
for (i = 0; i < DUMP_NAME_LEN; i++)
efi_name[i] = name[i];
- ret = efivar_entry_set_safe(efi_name, vendor, PSTORE_EFI_ATTRIBUTES,
- false, record->size, record->psi->buf);
-
- if (record->reason == KMSG_DUMP_OOPS && try_module_get(THIS_MODULE))
- if (!schedule_work(&efivar_work))
- module_put(THIS_MODULE);
-
- return ret;
+ if (efivar_trylock())
+ return -EBUSY;
+ status = efivar_set_variable_locked(efi_name, &LINUX_EFI_CRASH_GUID,
+ PSTORE_EFI_ATTRIBUTES,
+ record->size, record->psi->buf,
+ true);
+ efivar_unlock();
+ return status == EFI_SUCCESS ? 0 : -EIO;
};
-/*
- * Clean up an entry with the same name
- */
-static int efi_pstore_erase_func(struct efivar_entry *entry, void *data)
-{
- efi_char16_t *efi_name = data;
- efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
- unsigned long ucs2_len = ucs2_strlen(efi_name);
-
- if (efi_guidcmp(entry->var.VendorGuid, vendor))
- return 0;
-
- if (ucs2_strncmp(entry->var.VariableName, efi_name, (size_t)ucs2_len))
- return 0;
-
- if (entry->scanning) {
- /*
- * Skip deletion because this entry will be deleted
- * after scanning is completed.
- */
- entry->deleting = true;
- } else
- list_del(&entry->list);
-
- /* found */
- __efivar_entry_delete(entry);
-
- return 1;
-}
-
-static int efi_pstore_erase_name(const char *name)
-{
- struct efivar_entry *entry = NULL;
- efi_char16_t efi_name[DUMP_NAME_LEN];
- int found, i;
-
- for (i = 0; i < DUMP_NAME_LEN; i++) {
- efi_name[i] = name[i];
- if (name[i] == '\0')
- break;
- }
-
- if (efivar_entry_iter_begin())
- return -EINTR;
-
- found = __efivar_entry_iter(efi_pstore_erase_func, &efi_pstore_list,
- efi_name, &entry);
- efivar_entry_iter_end();
-
- if (found && !entry->scanning)
- kfree(entry);
-
- return found ? 0 : -ENOENT;
-}
-
static int efi_pstore_erase(struct pstore_record *record)
{
- char name[DUMP_NAME_LEN];
- int ret;
-
- snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lld",
- record->type, record->part, record->count,
- (long long)record->time.tv_sec);
- ret = efi_pstore_erase_name(name);
- if (ret != -ENOENT)
- return ret;
+ efi_status_t status;
- snprintf(name, sizeof(name), "dump-type%u-%u-%lld",
- record->type, record->part, (long long)record->time.tv_sec);
- ret = efi_pstore_erase_name(name);
+ status = efivar_set_variable(record->priv, &LINUX_EFI_CRASH_GUID,
+ PSTORE_EFI_ATTRIBUTES, 0, NULL);
- return ret;
+ if (status != EFI_SUCCESS && status != EFI_NOT_FOUND)
+ return -EIO;
+ return 0;
}
static struct pstore_info efi_pstore_info = {
.erase = efi_pstore_erase,
};
-static int efi_pstore_callback(efi_char16_t *name, efi_guid_t vendor,
- unsigned long name_size, void *data)
-{
- struct efivar_entry *entry;
- int ret;
-
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry)
- return -ENOMEM;
-
- memcpy(entry->var.VariableName, name, name_size);
- entry->var.VendorGuid = vendor;
-
- ret = efivar_entry_add(entry, &efi_pstore_list);
- if (ret)
- kfree(entry);
-
- return ret;
-}
-
-static int efi_pstore_update_entry(efi_char16_t *name, efi_guid_t vendor,
- unsigned long name_size, void *data)
-{
- struct efivar_entry *entry = data;
-
- if (efivar_entry_find(name, vendor, &efi_pstore_list, false))
- return 0;
-
- memcpy(entry->var.VariableName, name, name_size);
- memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t));
-
- return 1;
-}
-
-static void efi_pstore_update_entries(struct work_struct *work)
-{
- struct efivar_entry *entry;
- int err;
-
- /* Add new sysfs entries */
- while (1) {
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry)
- return;
-
- err = efivar_init(efi_pstore_update_entry, entry,
- false, &efi_pstore_list);
- if (!err)
- break;
-
- efivar_entry_add(entry, &efi_pstore_list);
- }
-
- kfree(entry);
- module_put(THIS_MODULE);
-}
-
static __init int efivars_pstore_init(void)
{
- int ret;
-
- if (!efivars_kobject() || !efivar_supports_writes())
+ if (!efivar_supports_writes())
return 0;
if (efivars_pstore_disable)
return 0;
- ret = efivar_init(efi_pstore_callback, NULL, true, &efi_pstore_list);
- if (ret)
- return ret;
-
efi_pstore_info.buf = kmalloc(4096, GFP_KERNEL);
if (!efi_pstore_info.buf)
return -ENOMEM;
efi_pstore_info.bufsize = 0;
}
- INIT_WORK(&efivar_work, efi_pstore_update_entries);
-
return 0;
}
}
#ifdef CONFIG_EFI_CUSTOM_SSDT_OVERLAYS
-#define EFIVAR_SSDT_NAME_MAX 16
+#define EFIVAR_SSDT_NAME_MAX 16UL
static char efivar_ssdt[EFIVAR_SSDT_NAME_MAX] __initdata;
static int __init efivar_ssdt_setup(char *str)
{
}
__setup("efivar_ssdt=", efivar_ssdt_setup);
-static __init int efivar_ssdt_iter(efi_char16_t *name, efi_guid_t vendor,
- unsigned long name_size, void *data)
-{
- struct efivar_entry *entry;
- struct list_head *list = data;
- char utf8_name[EFIVAR_SSDT_NAME_MAX];
- int limit = min_t(unsigned long, EFIVAR_SSDT_NAME_MAX, name_size);
-
- ucs2_as_utf8(utf8_name, name, limit - 1);
- if (strncmp(utf8_name, efivar_ssdt, limit) != 0)
- return 0;
-
- entry = kmalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry)
- return 0;
-
- memcpy(entry->var.VariableName, name, name_size);
- memcpy(&entry->var.VendorGuid, &vendor, sizeof(efi_guid_t));
-
- efivar_entry_add(entry, list);
-
- return 0;
-}
-
static __init int efivar_ssdt_load(void)
{
- LIST_HEAD(entries);
- struct efivar_entry *entry, *aux;
- unsigned long size;
- void *data;
- int ret;
+ unsigned long name_size = 256;
+ efi_char16_t *name = NULL;
+ efi_status_t status;
+ efi_guid_t guid;
if (!efivar_ssdt[0])
return 0;
- ret = efivar_init(efivar_ssdt_iter, &entries, true, &entries);
-
- list_for_each_entry_safe(entry, aux, &entries, list) {
- pr_info("loading SSDT from variable %s-%pUl\n", efivar_ssdt,
- &entry->var.VendorGuid);
+ name = kzalloc(name_size, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
- list_del(&entry->list);
+ for (;;) {
+ char utf8_name[EFIVAR_SSDT_NAME_MAX];
+ unsigned long data_size = 0;
+ void *data;
+ int limit;
- ret = efivar_entry_size(entry, &size);
- if (ret) {
- pr_err("failed to get var size\n");
- goto free_entry;
+ status = efi.get_next_variable(&name_size, name, &guid);
+ if (status == EFI_NOT_FOUND) {
+ break;
+ } else if (status == EFI_BUFFER_TOO_SMALL) {
+ name = krealloc(name, name_size, GFP_KERNEL);
+ if (!name)
+ return -ENOMEM;
+ continue;
}
- data = kmalloc(size, GFP_KERNEL);
- if (!data) {
- ret = -ENOMEM;
- goto free_entry;
- }
+ limit = min(EFIVAR_SSDT_NAME_MAX, name_size);
+ ucs2_as_utf8(utf8_name, name, limit - 1);
+ if (strncmp(utf8_name, efivar_ssdt, limit) != 0)
+ continue;
- ret = efivar_entry_get(entry, NULL, &size, data);
- if (ret) {
- pr_err("failed to get var data\n");
- goto free_data;
- }
+ pr_info("loading SSDT from variable %s-%pUl\n", efivar_ssdt, &guid);
- ret = acpi_load_table(data, NULL);
- if (ret) {
- pr_err("failed to load table: %d\n", ret);
- goto free_data;
- }
+ status = efi.get_variable(name, &guid, NULL, &data_size, NULL);
+ if (status != EFI_BUFFER_TOO_SMALL || !data_size)
+ return -EIO;
- goto free_entry;
+ data = kmalloc(data_size, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
-free_data:
+ status = efi.get_variable(name, &guid, NULL, &data_size, data);
+ if (status == EFI_SUCCESS) {
+ acpi_status ret = acpi_load_table(data, NULL);
+ if (ret)
+ pr_err("failed to load table: %u\n", ret);
+ } else {
+ pr_err("failed to get var data: 0x%lx\n", status);
+ }
kfree(data);
-
-free_entry:
- kfree(entry);
}
-
- return ret;
+ return 0;
}
#else
static inline int efivar_ssdt_load(void) { return 0; }
subsys_initcall(efisubsys_init);
+void __init efi_find_mirror(void)
+{
+ efi_memory_desc_t *md;
+ u64 mirror_size = 0, total_size = 0;
+
+ if (!efi_enabled(EFI_MEMMAP))
+ return;
+
+ for_each_efi_memory_desc(md) {
+ unsigned long long start = md->phys_addr;
+ unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
+
+ total_size += size;
+ if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
+ memblock_mark_mirror(start, size);
+ mirror_size += size;
+ }
+ }
+ if (mirror_size)
+ pr_info("Memory: %lldM/%lldM mirrored memory\n",
+ mirror_size>>20, total_size>>20);
+}
+
/*
* Find the efi memory descriptor for a given physical address. Given a
* physical address, determine if it exists within an EFI Memory Map entry,
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/slab.h>
+#include <linux/ucs2_string.h>
-static void efibc_str_to_str16(const char *str, efi_char16_t *str16)
-{
- size_t i;
-
- for (i = 0; i < strlen(str); i++)
- str16[i] = str[i];
-
- str16[i] = '\0';
-}
+#define MAX_DATA_LEN 512
-static int efibc_set_variable(const char *name, const char *value)
+static int efibc_set_variable(efi_char16_t *name, efi_char16_t *value,
+ unsigned long len)
{
- int ret;
- efi_guid_t guid = LINUX_EFI_LOADER_ENTRY_GUID;
- struct efivar_entry *entry;
- size_t size = (strlen(value) + 1) * sizeof(efi_char16_t);
+ efi_status_t status;
- if (size > sizeof(entry->var.Data)) {
- pr_err("value is too large (%zu bytes) for '%s' EFI variable\n", size, name);
- return -EINVAL;
- }
+ status = efi.set_variable(name, &LINUX_EFI_LOADER_ENTRY_GUID,
+ EFI_VARIABLE_NON_VOLATILE
+ | EFI_VARIABLE_BOOTSERVICE_ACCESS
+ | EFI_VARIABLE_RUNTIME_ACCESS,
+ len * sizeof(efi_char16_t), value);
- entry = kmalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry) {
- pr_err("failed to allocate efivar entry for '%s' EFI variable\n", name);
- return -ENOMEM;
+ if (status != EFI_SUCCESS) {
+ pr_err("failed to set EFI variable: 0x%lx\n", status);
+ return -EIO;
}
-
- efibc_str_to_str16(name, entry->var.VariableName);
- efibc_str_to_str16(value, (efi_char16_t *)entry->var.Data);
- memcpy(&entry->var.VendorGuid, &guid, sizeof(guid));
-
- ret = efivar_entry_set_safe(entry->var.VariableName,
- entry->var.VendorGuid,
- EFI_VARIABLE_NON_VOLATILE
- | EFI_VARIABLE_BOOTSERVICE_ACCESS
- | EFI_VARIABLE_RUNTIME_ACCESS,
- false, size, entry->var.Data);
-
- if (ret)
- pr_err("failed to set %s EFI variable: 0x%x\n",
- name, ret);
-
- kfree(entry);
- return ret;
+ return 0;
}
static int efibc_reboot_notifier_call(struct notifier_block *notifier,
unsigned long event, void *data)
{
- const char *reason = "shutdown";
+ efi_char16_t *reason = event == SYS_RESTART ? L"reboot"
+ : L"shutdown";
+ const u8 *str = data;
+ efi_char16_t *wdata;
+ unsigned long l;
int ret;
- if (event == SYS_RESTART)
- reason = "reboot";
-
- ret = efibc_set_variable("LoaderEntryRebootReason", reason);
+ ret = efibc_set_variable(L"LoaderEntryRebootReason", reason,
+ ucs2_strlen(reason));
if (ret || !data)
return NOTIFY_DONE;
- efibc_set_variable("LoaderEntryOneShot", (char *)data);
+ wdata = kmalloc(MAX_DATA_LEN * sizeof(efi_char16_t), GFP_KERNEL);
+ for (l = 0; l < MAX_DATA_LEN - 1 && str[l] != '\0'; l++)
+ wdata[l] = str[l];
+ wdata[l] = L'\0';
+
+ efibc_set_variable(L"LoaderEntryOneShot", wdata, l);
+ kfree(wdata);
return NOTIFY_DONE;
}
{
int ret;
- if (!efivars_kobject() || !efivar_supports_writes())
+ if (!efi_rt_services_supported(EFI_RT_SUPPORTED_SET_VARIABLE))
return -ENODEV;
ret = register_reboot_notifier(&efibc_reboot_notifier);
else if (__efivar_entry_delete(entry))
err = -EIO;
- if (err) {
- efivar_entry_iter_end();
+ efivar_entry_iter_end();
+
+ if (err)
return err;
- }
- if (!entry->scanning) {
- efivar_entry_iter_end();
- efivar_unregister(entry);
- } else
- efivar_entry_iter_end();
+ efivar_unregister(entry);
/* It's dead Jim.... */
return count;
}
kobject_uevent(&new_var->kobj, KOBJ_ADD);
- if (efivar_entry_add(new_var, &efivar_sysfs_list)) {
- efivar_unregister(new_var);
- return -EINTR;
- }
+ __efivar_entry_add(new_var, &efivar_sysfs_list);
return 0;
}
static int efivar_sysfs_destroy(struct efivar_entry *entry, void *data)
{
- int err = efivar_entry_remove(entry);
-
- if (err)
- return err;
+ efivar_entry_remove(entry);
efivar_unregister(entry);
return 0;
}
/* Remove all entries and destroy */
int err;
- err = __efivar_entry_iter(efivar_sysfs_destroy, &efivar_sysfs_list,
- NULL, NULL);
+ err = efivar_entry_iter(efivar_sysfs_destroy, &efivar_sysfs_list, NULL);
if (err) {
pr_err("efivars: Failed to destroy sysfs entries\n");
return;
* Depending on whether mm_init() has already been invoked or not,
* either memblock or "normal" page allocation is used.
*
- * Returns the physical address of the allocated memory map on
- * success, zero on failure.
+ * Returns zero on success, a negative error code on failure.
*/
int __init efi_memmap_alloc(unsigned int num_entries,
struct efi_memory_map_data *data)
* @range: Address range (start, end) to split around
*
* Returns the number of additional EFI memmap entries required to
- * accomodate @range.
+ * accommodate @range.
*/
int __init efi_memmap_split_count(efi_memory_desc_t *md, struct range *range)
{
}
EXPORT_SYMBOL_GPL(efivar_variable_is_removable);
-static efi_status_t
-check_var_size(u32 attributes, unsigned long size)
+efi_status_t check_var_size(u32 attributes, unsigned long size)
{
const struct efivar_operations *fops;
- if (!__efivars)
- return EFI_UNSUPPORTED;
-
fops = __efivars->ops;
if (!fops->query_variable_store)
return fops->query_variable_store(attributes, size, false);
}
+EXPORT_SYMBOL_NS_GPL(check_var_size, EFIVAR);
-static efi_status_t
-check_var_size_nonblocking(u32 attributes, unsigned long size)
+efi_status_t check_var_size_nonblocking(u32 attributes, unsigned long size)
{
const struct efivar_operations *fops;
- if (!__efivars)
- return EFI_UNSUPPORTED;
-
fops = __efivars->ops;
if (!fops->query_variable_store)
return fops->query_variable_store(attributes, size, true);
}
+EXPORT_SYMBOL_NS_GPL(check_var_size_nonblocking, EFIVAR);
static bool variable_is_present(efi_char16_t *variable_name, efi_guid_t *vendor,
struct list_head *head)
&vendor_guid);
switch (status) {
case EFI_SUCCESS:
- if (duplicates)
- up(&efivars_lock);
-
variable_name_size = var_name_strnsize(variable_name,
variable_name_size);
if (err)
status = EFI_NOT_FOUND;
}
-
- if (duplicates) {
- if (down_interruptible(&efivars_lock)) {
- err = -EINTR;
- goto free;
- }
- }
-
break;
case EFI_UNSUPPORTED:
err = -EOPNOTSUPP;
}
EXPORT_SYMBOL_GPL(efivar_entry_add);
+/**
+ * __efivar_entry_add - add entry to variable list
+ * @entry: entry to add to list
+ * @head: list head
+ */
+void __efivar_entry_add(struct efivar_entry *entry, struct list_head *head)
+{
+ list_add(&entry->list, head);
+}
+EXPORT_SYMBOL_GPL(__efivar_entry_add);
+
/**
* efivar_entry_remove - remove entry from variable list
* @entry: entry to remove from list
- *
- * Returns 0 on success, or a kernel error code on failure.
*/
-int efivar_entry_remove(struct efivar_entry *entry)
+void efivar_entry_remove(struct efivar_entry *entry)
{
- if (down_interruptible(&efivars_lock))
- return -EINTR;
list_del(&entry->list);
- up(&efivars_lock);
-
- return 0;
}
EXPORT_SYMBOL_GPL(efivar_entry_remove);
if (!found)
return NULL;
- if (remove) {
- if (entry->scanning) {
- /*
- * The entry will be deleted
- * after scanning is completed.
- */
- entry->deleting = true;
- } else
- list_del(&entry->list);
- }
+ if (remove)
+ list_del(&entry->list);
return entry;
}
}
EXPORT_SYMBOL_GPL(efivar_entry_iter_end);
-/**
- * __efivar_entry_iter - iterate over variable list
- * @func: callback function
- * @head: head of the variable list
- * @data: function-specific data to pass to callback
- * @prev: entry to begin iterating from
- *
- * Iterate over the list of EFI variables and call @func with every
- * entry on the list. It is safe for @func to remove entries in the
- * list via efivar_entry_delete().
- *
- * You MUST call efivar_entry_iter_begin() before this function, and
- * efivar_entry_iter_end() afterwards.
- *
- * It is possible to begin iteration from an arbitrary entry within
- * the list by passing @prev. @prev is updated on return to point to
- * the last entry passed to @func. To begin iterating from the
- * beginning of the list @prev must be %NULL.
- *
- * The restrictions for @func are the same as documented for
- * efivar_entry_iter().
- */
-int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
- struct list_head *head, void *data,
- struct efivar_entry **prev)
-{
- struct efivar_entry *entry, *n;
- int err = 0;
-
- if (!prev || !*prev) {
- list_for_each_entry_safe(entry, n, head, list) {
- err = func(entry, data);
- if (err)
- break;
- }
-
- if (prev)
- *prev = entry;
-
- return err;
- }
-
-
- list_for_each_entry_safe_continue((*prev), n, head, list) {
- err = func(*prev, data);
- if (err)
- break;
- }
-
- return err;
-}
-EXPORT_SYMBOL_GPL(__efivar_entry_iter);
-
/**
* efivar_entry_iter - iterate over variable list
* @func: callback function
int efivar_entry_iter(int (*func)(struct efivar_entry *, void *),
struct list_head *head, void *data)
{
+ struct efivar_entry *entry, *n;
int err = 0;
err = efivar_entry_iter_begin();
if (err)
return err;
- err = __efivar_entry_iter(func, head, data, NULL);
+
+ list_for_each_entry_safe(entry, n, head, list) {
+ err = func(entry, data);
+ if (err)
+ break;
+ }
efivar_entry_iter_end();
return err;
return __efivars && __efivars->ops->set_variable;
}
EXPORT_SYMBOL_GPL(efivar_supports_writes);
+
+/*
+ * efivar_lock() - obtain the efivar lock, wait for it if needed
+ * @return 0 on success, error code on failure
+ */
+int efivar_lock(void)
+{
+ if (down_interruptible(&efivars_lock))
+ return -EINTR;
+ if (!__efivars->ops) {
+ up(&efivars_lock);
+ return -ENODEV;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(efivar_lock, EFIVAR);
+
+/*
+ * efivar_lock() - obtain the efivar lock if it is free
+ * @return 0 on success, error code on failure
+ */
+int efivar_trylock(void)
+{
+ if (down_trylock(&efivars_lock))
+ return -EBUSY;
+ if (!__efivars->ops) {
+ up(&efivars_lock);
+ return -ENODEV;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(efivar_trylock, EFIVAR);
+
+/*
+ * efivar_unlock() - release the efivar lock
+ */
+void efivar_unlock(void)
+{
+ up(&efivars_lock);
+}
+EXPORT_SYMBOL_NS_GPL(efivar_unlock, EFIVAR);
+
+/*
+ * efivar_get_variable() - retrieve a variable identified by name/vendor
+ *
+ * Must be called with efivars_lock held.
+ */
+efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
+ u32 *attr, unsigned long *size, void *data)
+{
+ return __efivars->ops->get_variable(name, vendor, attr, size, data);
+}
+EXPORT_SYMBOL_NS_GPL(efivar_get_variable, EFIVAR);
+
+/*
+ * efivar_get_next_variable() - enumerate the next name/vendor pair
+ *
+ * Must be called with efivars_lock held.
+ */
+efi_status_t efivar_get_next_variable(unsigned long *name_size,
+ efi_char16_t *name, efi_guid_t *vendor)
+{
+ return __efivars->ops->get_next_variable(name_size, name, vendor);
+}
+EXPORT_SYMBOL_NS_GPL(efivar_get_next_variable, EFIVAR);
+
+/*
+ * efivar_set_variable_blocking() - local helper function for set_variable
+ *
+ * Must be called with efivars_lock held.
+ */
+static efi_status_t
+efivar_set_variable_blocking(efi_char16_t *name, efi_guid_t *vendor,
+ u32 attr, unsigned long data_size, void *data)
+{
+ efi_status_t status;
+
+ if (data_size > 0) {
+ status = check_var_size(attr, data_size +
+ ucs2_strsize(name, 1024));
+ if (status != EFI_SUCCESS)
+ return status;
+ }
+ return __efivars->ops->set_variable(name, vendor, attr, data_size, data);
+}
+
+/*
+ * efivar_set_variable_locked() - set a variable identified by name/vendor
+ *
+ * Must be called with efivars_lock held. If @nonblocking is set, it will use
+ * non-blocking primitives so it is guaranteed not to sleep.
+ */
+efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
+ u32 attr, unsigned long data_size,
+ void *data, bool nonblocking)
+{
+ efi_set_variable_t *setvar;
+ efi_status_t status;
+
+ if (!nonblocking)
+ return efivar_set_variable_blocking(name, vendor, attr,
+ data_size, data);
+
+ /*
+ * If no _nonblocking variant exists, the ordinary one
+ * is assumed to be non-blocking.
+ */
+ setvar = __efivars->ops->set_variable_nonblocking ?:
+ __efivars->ops->set_variable;
+
+ if (data_size > 0) {
+ status = check_var_size_nonblocking(attr, data_size +
+ ucs2_strsize(name, 1024));
+ if (status != EFI_SUCCESS)
+ return status;
+ }
+ return setvar(name, vendor, attr, data_size, data);
+}
+EXPORT_SYMBOL_NS_GPL(efivar_set_variable_locked, EFIVAR);
+
+/*
+ * efivar_set_variable() - set a variable identified by name/vendor
+ *
+ * Can be called without holding the efivars_lock. Will sleep on obtaining the
+ * lock, or on obtaining other locks that are needed in order to complete the
+ * call.
+ */
+efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
+ u32 attr, unsigned long data_size, void *data)
+{
+ efi_status_t status;
+
+ if (efivar_lock())
+ return EFI_ABORTED;
+
+ status = efivar_set_variable_blocking(name, vendor, attr, data_size, data);
+ efivar_unlock();
+ return status;
+}
+EXPORT_SYMBOL_NS_GPL(efivar_set_variable, EFIVAR);
static int applespi_get_saved_bl_level(struct applespi_data *applespi)
{
- struct efivar_entry *efivar_entry;
+ efi_status_t sts = EFI_NOT_FOUND;
u16 efi_data = 0;
- unsigned long efi_data_len;
- int sts;
-
- efivar_entry = kmalloc(sizeof(*efivar_entry), GFP_KERNEL);
- if (!efivar_entry)
- return -ENOMEM;
-
- memcpy(efivar_entry->var.VariableName, EFI_BL_LEVEL_NAME,
- sizeof(EFI_BL_LEVEL_NAME));
- efivar_entry->var.VendorGuid = EFI_BL_LEVEL_GUID;
- efi_data_len = sizeof(efi_data);
+ unsigned long efi_data_len = sizeof(efi_data);
- sts = efivar_entry_get(efivar_entry, NULL, &efi_data_len, &efi_data);
- if (sts && sts != -ENOENT)
+ if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
+ sts = efi.get_variable(EFI_BL_LEVEL_NAME, &EFI_BL_LEVEL_GUID,
+ NULL, &efi_data_len, &efi_data);
+ if (sts != EFI_SUCCESS && sts != EFI_NOT_FOUND)
dev_warn(&applespi->spi->dev,
- "Error getting backlight level from EFI vars: %d\n",
+ "Error getting backlight level from EFI vars: 0x%lx\n",
sts);
- kfree(efivar_entry);
-
- return sts ? sts : efi_data;
+ return sts != EFI_SUCCESS ? -ENODEV : efi_data;
}
static void applespi_save_bl_level(struct applespi_data *applespi,
unsigned int level)
{
- efi_guid_t efi_guid;
+ efi_status_t sts = EFI_UNSUPPORTED;
u32 efi_attr;
- unsigned long efi_data_len;
u16 efi_data;
- int sts;
- /* Save keyboard backlight level */
- efi_guid = EFI_BL_LEVEL_GUID;
efi_data = (u16)level;
- efi_data_len = sizeof(efi_data);
efi_attr = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS;
- sts = efivar_entry_set_safe((efi_char16_t *)EFI_BL_LEVEL_NAME, efi_guid,
- efi_attr, true, efi_data_len, &efi_data);
- if (sts)
+ if (efi_rt_services_supported(EFI_RT_SUPPORTED_SET_VARIABLE))
+ sts = efi.set_variable(EFI_BL_LEVEL_NAME, &EFI_BL_LEVEL_GUID,
+ efi_attr, sizeof(efi_data), &efi_data);
+ if (sts != EFI_SUCCESS)
dev_warn(&applespi->spi->dev,
- "Error saving backlight level to EFI vars: %d\n", sts);
+ "Error saving backlight level to EFI vars: 0x%lx\n", sts);
}
static int applespi_probe(struct spi_device *spi)
static u8 *brcmf_fw_nvram_from_efi(size_t *data_len_ret)
{
- const u16 name[] = { 'n', 'v', 'r', 'a', 'm', 0 };
- struct efivar_entry *nvram_efivar;
+ efi_guid_t guid = EFI_GUID(0x74b00bd9, 0x805a, 0x4d61, 0xb5, 0x1f,
+ 0x43, 0x26, 0x81, 0x23, 0xd1, 0x13);
unsigned long data_len = 0;
+ efi_status_t status;
u8 *data = NULL;
- int err;
- nvram_efivar = kzalloc(sizeof(*nvram_efivar), GFP_KERNEL);
- if (!nvram_efivar)
+ if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
return NULL;
- memcpy(&nvram_efivar->var.VariableName, name, sizeof(name));
- nvram_efivar->var.VendorGuid = EFI_GUID(0x74b00bd9, 0x805a, 0x4d61,
- 0xb5, 0x1f, 0x43, 0x26,
- 0x81, 0x23, 0xd1, 0x13);
-
- err = efivar_entry_size(nvram_efivar, &data_len);
- if (err)
+ status = efi.get_variable(L"nvram", &guid, NULL, &data_len, NULL);
+ if (status != EFI_BUFFER_TOO_SMALL)
goto fail;
data = kmalloc(data_len, GFP_KERNEL);
if (!data)
goto fail;
- err = efivar_entry_get(nvram_efivar, NULL, &data_len, data);
- if (err)
+ status = efi.get_variable(L"nvram", &guid, NULL, &data_len, data);
+ if (status != EFI_SUCCESS)
goto fail;
brcmf_fw_fix_efi_nvram_ccode(data, data_len);
brcmf_info("Using nvram EFI variable\n");
- kfree(nvram_efivar);
*data_len_ret = data_len;
return data;
-
fail:
kfree(data);
- kfree(nvram_efivar);
return NULL;
}
#else
void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)
{
- struct efivar_entry *pnvm_efivar;
void *data;
unsigned long package_size;
- int err;
+ efi_status_t status;
*len = 0;
- pnvm_efivar = kzalloc(sizeof(*pnvm_efivar), GFP_KERNEL);
- if (!pnvm_efivar)
- return ERR_PTR(-ENOMEM);
-
- memcpy(&pnvm_efivar->var.VariableName, IWL_UEFI_OEM_PNVM_NAME,
- sizeof(IWL_UEFI_OEM_PNVM_NAME));
- pnvm_efivar->var.VendorGuid = IWL_EFI_VAR_GUID;
+ if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
+ return ERR_PTR(-ENODEV);
/*
* TODO: we hardcode a maximum length here, because reading
package_size = IWL_HARDCODED_PNVM_SIZE;
data = kmalloc(package_size, GFP_KERNEL);
- if (!data) {
- data = ERR_PTR(-ENOMEM);
- goto out;
- }
+ if (!data)
+ return ERR_PTR(-ENOMEM);
- err = efivar_entry_get(pnvm_efivar, NULL, &package_size, data);
- if (err) {
+ status = efi.get_variable(IWL_UEFI_OEM_PNVM_NAME, &IWL_EFI_VAR_GUID,
+ NULL, &package_size, data);
+ if (status != EFI_SUCCESS) {
IWL_DEBUG_FW(trans,
- "PNVM UEFI variable not found %d (len %lu)\n",
- err, package_size);
+ "PNVM UEFI variable not found 0x%lx (len %lu)\n",
+ status, package_size);
kfree(data);
- data = ERR_PTR(err);
- goto out;
+ return ERR_PTR(-ENOENT);
}
IWL_DEBUG_FW(trans, "Read PNVM from UEFI with size %lu\n", package_size);
*len = package_size;
-out:
- kfree(pnvm_efivar);
-
return data;
}
void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)
{
- struct efivar_entry *reduce_power_efivar;
struct pnvm_sku_package *package;
void *data = NULL;
unsigned long package_size;
- int err;
+ efi_status_t status;
*len = 0;
- reduce_power_efivar = kzalloc(sizeof(*reduce_power_efivar), GFP_KERNEL);
- if (!reduce_power_efivar)
- return ERR_PTR(-ENOMEM);
-
- memcpy(&reduce_power_efivar->var.VariableName, IWL_UEFI_REDUCED_POWER_NAME,
- sizeof(IWL_UEFI_REDUCED_POWER_NAME));
- reduce_power_efivar->var.VendorGuid = IWL_EFI_VAR_GUID;
+ if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
+ return ERR_PTR(-ENODEV);
/*
* TODO: we hardcode a maximum length here, because reading
package_size = IWL_HARDCODED_REDUCE_POWER_SIZE;
package = kmalloc(package_size, GFP_KERNEL);
- if (!package) {
- package = ERR_PTR(-ENOMEM);
- goto out;
- }
+ if (!package)
+ return ERR_PTR(-ENOMEM);
- err = efivar_entry_get(reduce_power_efivar, NULL, &package_size, package);
- if (err) {
+ status = efi.get_variable(IWL_UEFI_REDUCED_POWER_NAME, &IWL_EFI_VAR_GUID,
+ NULL, &package_size, data);
+ if (status != EFI_SUCCESS) {
IWL_DEBUG_FW(trans,
- "Reduced Power UEFI variable not found %d (len %lu)\n",
- err, package_size);
+ "Reduced Power UEFI variable not found 0x%lx (len %lu)\n",
+ status, package_size);
kfree(package);
- data = ERR_PTR(err);
- goto out;
+ return ERR_PTR(-ENOENT);
}
IWL_DEBUG_FW(trans, "Read reduced power from UEFI with size %lu\n",
kfree(package);
-out:
- kfree(reduce_power_efivar);
-
return data;
}
void iwl_uefi_get_sgom_table(struct iwl_trans *trans,
struct iwl_fw_runtime *fwrt)
{
- struct efivar_entry *sgom_efivar;
struct uefi_cnv_wlan_sgom_data *data;
unsigned long package_size;
- int err, ret;
-
- if (!fwrt->geo_enabled)
- return;
+ efi_status_t status;
+ int ret;
- sgom_efivar = kzalloc(sizeof(*sgom_efivar), GFP_KERNEL);
- if (!sgom_efivar)
+ if (!fwrt->geo_enabled ||
+ !efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
return;
- memcpy(&sgom_efivar->var.VariableName, IWL_UEFI_SGOM_NAME,
- sizeof(IWL_UEFI_SGOM_NAME));
- sgom_efivar->var.VendorGuid = IWL_EFI_VAR_GUID;
-
/* TODO: we hardcode a maximum length here, because reading
* from the UEFI is not working. To implement this properly,
* we have to call efivar_entry_size().
package_size = IWL_HARDCODED_SGOM_SIZE;
data = kmalloc(package_size, GFP_KERNEL);
- if (!data) {
- data = ERR_PTR(-ENOMEM);
- goto out;
- }
+ if (!data)
+ return;
- err = efivar_entry_get(sgom_efivar, NULL, &package_size, data);
- if (err) {
+ status = efi.get_variable(IWL_UEFI_SGOM_NAME, &IWL_EFI_VAR_GUID,
+ NULL, &package_size, data);
+ if (status != EFI_SUCCESS) {
IWL_DEBUG_FW(trans,
- "SGOM UEFI variable not found %d\n", err);
+ "SGOM UEFI variable not found 0x%lx\n", status);
goto out_free;
}
out_free:
kfree(data);
-out:
- kfree(sgom_efivar);
}
IWL_EXPORT_SYMBOL(iwl_uefi_get_sgom_table);
#endif /* CONFIG_ACPI */
const struct dmi_system_id *id;
struct device *dev = maindev;
char var8[CFG_VAR_NAME_MAX];
- struct efivar_entry *ev;
+ efi_status_t status;
int i, ret;
/* For sensors, try first to use the _DSM table */
for (i = 0; i < sizeof(var8) && var8[i]; i++)
var16[i] = var8[i];
- /* Not sure this API usage is kosher; efivar_entry_get()'s
- * implementation simply uses VariableName and VendorGuid from
- * the struct and ignores the rest, but it seems like there
- * ought to be an "official" efivar_entry registered
- * somewhere?
- */
- ev = kzalloc(sizeof(*ev), GFP_KERNEL);
- if (!ev)
- return -ENOMEM;
- memcpy(&ev->var.VariableName, var16, sizeof(var16));
- ev->var.VendorGuid = GMIN_CFG_VAR_EFI_GUID;
- ev->var.DataSize = *out_len;
-
- ret = efivar_entry_get(ev, &ev->var.Attributes,
- &ev->var.DataSize, ev->var.Data);
- if (ret == 0) {
- memcpy(out, ev->var.Data, ev->var.DataSize);
- *out_len = ev->var.DataSize;
+ status = EFI_UNSUPPORTED;
+ if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
+ status = efi.get_variable(var16, &GMIN_CFG_VAR_EFI_GUID, NULL,
+ (unsigned long *)out_len, out);
+ if (status == EFI_SUCCESS) {
dev_info(maindev, "found EFI entry for '%s'\n", var8);
} else if (is_gmin) {
dev_info(maindev, "Failed to find EFI gmin variable %s\n", var8);
dev_info(maindev, "Failed to find EFI variable %s\n", var8);
}
- kfree(ev);
-
return ret;
}
goto fail_inode;
}
- efivar_entry_size(entry, &size);
- err = efivar_entry_add(entry, &efivarfs_list);
- if (err)
- goto fail_inode;
+ __efivar_entry_get(entry, NULL, &size, NULL);
+ __efivar_entry_add(entry, &efivarfs_list);
/* copied by the above to local storage in the dentry. */
kfree(name);
static int efivarfs_destroy(struct efivar_entry *entry, void *data)
{
- int err = efivar_entry_remove(entry);
-
- if (err)
- return err;
+ efivar_entry_remove(entry);
kfree(entry);
return 0;
}
err = efivar_init(efivarfs_callback, (void *)sb, true, &efivarfs_list);
if (err)
- __efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL, NULL);
+ efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL);
return err;
}
kill_litter_super(sb);
/* Remove all entries and destroy */
- __efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL, NULL);
+ efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL);
}
static struct file_system_type efivarfs_type = {
return;
if (private->record) {
kfree(private->record->buf);
+ kfree(private->record->priv);
kfree(private->record);
}
kfree(private);
if (rc) {
/* pstore_mkfile() did not take record, so free it. */
kfree(record->buf);
+ kfree(record->priv);
kfree(record);
if (rc != -EEXIST || !quiet)
failed++;
{
return (efi.runtime_supported_mask & mask) == mask;
}
+extern void efi_find_mirror(void);
#else
static inline bool efi_enabled(int feature)
{
{
return false;
}
+
+static inline void efi_find_mirror(void) {}
#endif
extern int efi_status_to_err(efi_status_t status);
struct efi_variable var;
struct list_head list;
struct kobject kobj;
- bool scanning;
- bool deleting;
};
static inline void
void *data, bool duplicates, struct list_head *head);
int efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
-int efivar_entry_remove(struct efivar_entry *entry);
+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_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);
bool efivar_variable_is_removable(efi_guid_t vendor, const char *name,
size_t len);
+int efivar_lock(void);
+int efivar_trylock(void);
+void efivar_unlock(void);
+
+efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor,
+ u32 *attr, unsigned long *size, void *data);
+
+efi_status_t efivar_get_next_variable(unsigned long *name_size,
+ efi_char16_t *name, efi_guid_t *vendor);
+
+efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor,
+ u32 attr, unsigned long data_size,
+ void *data, bool nonblocking);
+
+efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor,
+ u32 attr, unsigned long data_size, void *data);
+
+efi_status_t check_var_size(u32 attributes, unsigned long size);
+efi_status_t check_var_size_nonblocking(u32 attributes, unsigned long size);
+
#if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)
extern bool efi_capsule_pending(int *reset_type);
efi_status_t efi_random_get_seed(void);
+#define arch_efi_call_virt(p, f, args...) ((p)->f(args))
+
/*
* Arch code can implement the following three template macros, avoiding
* reptition for the void/non-void return cases of {__,}efi_call_virt():
* @size: size of @buf
* @ecc_notice_size:
* ECC information for @buf
+ * @priv: pointer for backend specific use, will be
+ * kfree()d by the pstore core if non-NULL
+ * when the record is freed.
*
* Valid for PSTORE_TYPE_DMESG @type:
*
char *buf;
ssize_t size;
ssize_t ecc_notice_size;
+ void *priv;
int count;
enum kmsg_dump_reason reason;
DECLARE_PER_CPU(struct per_cpu_nodestat, boot_nodestats);
+extern bool mirrored_kernelcore;
+
#endif /* __MM_INTERNAL_H */
NUMA_NO_NODE, flags);
if (!ret && (flags & MEMBLOCK_MIRROR)) {
- pr_warn("Could not allocate %pap bytes of mirrored memory\n",
+ pr_warn_ratelimited("Could not allocate %pap bytes of mirrored memory\n",
&size);
flags &= ~MEMBLOCK_MIRROR;
goto again;
*/
int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size)
{
+ if (!mirrored_kernelcore)
+ return 0;
+
system_has_some_mirror = true;
return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR);
if (flags & MEMBLOCK_MIRROR) {
flags &= ~MEMBLOCK_MIRROR;
- pr_warn("Could not allocate %pap bytes of mirrored memory\n",
+ pr_warn_ratelimited("Could not allocate %pap bytes of mirrored memory\n",
&size);
goto again;
}
static unsigned long required_movablecore __initdata;
static unsigned long required_movablecore_percent __initdata;
static unsigned long zone_movable_pfn[MAX_NUMNODES] __initdata;
-static bool mirrored_kernelcore __meminitdata;
+bool mirrored_kernelcore __initdata_memblock;
/* movable_zone is the "real" zone pages in ZONE_MOVABLE are taken from */
int movable_zone;
int actual_node = early_pfn_to_nid(pfn);
if (node_distance(actual_node, node) > LOCAL_DISTANCE)
- pr_warn("[%lx-%lx] potential offnode page_structs\n",
+ pr_warn_once("[%lx-%lx] potential offnode page_structs\n",
start, end - 1);
}
return 0;
}
-get_efi_var_secureboot_mode()
-{
- local efi_vars
- local secure_boot_file
- local setup_mode_file
- local secureboot_mode
- local setup_mode
-
- if [ ! -d "$efi_vars" ]; then
- log_skip "efi_vars is not enabled\n"
- fi
- secure_boot_file=$(find "$efi_vars" -name SecureBoot-* 2>/dev/null)
- setup_mode_file=$(find "$efi_vars" -name SetupMode-* 2>/dev/null)
- if [ -f "$secure_boot_file/data" ] && \
- [ -f "$setup_mode_file/data" ]; then
- secureboot_mode=`od -An -t u1 "$secure_boot_file/data"`
- setup_mode=`od -An -t u1 "$setup_mode_file/data"`
-
- if [ $secureboot_mode -eq 1 ] && [ $setup_mode -eq 0 ]; then
- log_info "secure boot mode enabled (CONFIG_EFI_VARS)"
- return 1;
- fi
- fi
- return 0;
-}
-
# On powerpc platform, check device-tree property
# /proc/device-tree/ibm,secureboot/os-secureboot-enforcing
# to detect secureboot state.
}
# Check efivar SecureBoot-$(the UUID) and SetupMode-$(the UUID).
-# The secure boot mode can be accessed either as the last integer
-# of "od -An -t u1 /sys/firmware/efi/efivars/SecureBoot-*" or from
-# "od -An -t u1 /sys/firmware/efi/vars/SecureBoot-*/data". The efi
+# The secure boot mode can be accessed as the last integer of
+# "od -An -t u1 /sys/firmware/efi/efivars/SecureBoot-*". The efi
# SetupMode can be similarly accessed.
# Return 1 for SecureBoot mode enabled and SetupMode mode disabled.
get_secureboot_mode()
else
get_efivarfs_secureboot_mode
secureboot_mode=$?
- # fallback to using the efi_var files
- if [ $secureboot_mode -eq 0 ]; then
- get_efi_var_secureboot_mode
- secureboot_mode=$?
- fi
fi
if [ $secureboot_mode -eq 0 ]; then
projects / linux-2.6-microblaze.git / commitdiff