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authorMatt Fleming <matt@codeblueprint.co.uk>2016-03-01 23:02:56 +0000
committerMatt Fleming <matt@codeblueprint.co.uk>2016-09-09 16:08:36 +0100
commit31ce8cc68180803aa481c0c1daac29d8eaceca9d (patch)
tree8c5310d53093e288169a193b1776ce33b4237589 /drivers/firmware/efi
parent816e76129ed5fadd28e526c43397c79775194b5c (diff)
efi/runtime-map: Use efi.memmap directly instead of a copy
Now that efi.memmap is available all of the time there's no need to allocate and build a separate copy of the EFI memory map. Furthermore, efi.memmap contains boot services regions but only those regions that have been reserved via efi_mem_reserve(). Using efi.memmap allows us to pass boot services across kexec reboot so that the ESRT and BGRT drivers will now work. Tested-by: Dave Young <dyoung@redhat.com> [kexec/kdump] Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> [arm] Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Leif Lindholm <leif.lindholm@linaro.org> Cc: Peter Jones <pjones@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Diffstat (limited to 'drivers/firmware/efi')
-rw-r--r--drivers/firmware/efi/runtime-map.c35
1 files changed, 13 insertions, 22 deletions
diff --git a/drivers/firmware/efi/runtime-map.c b/drivers/firmware/efi/runtime-map.c
index 5c55227a34c8..8e64b77aeac9 100644
--- a/drivers/firmware/efi/runtime-map.c
+++ b/drivers/firmware/efi/runtime-map.c
@@ -14,10 +14,6 @@
#include <asm/setup.h>
-static void *efi_runtime_map;
-static int nr_efi_runtime_map;
-static u32 efi_memdesc_size;
-
struct efi_runtime_map_entry {
efi_memory_desc_t md;
struct kobject kobj; /* kobject for each entry */
@@ -106,7 +102,8 @@ static struct kobj_type __refdata map_ktype = {
static struct kset *map_kset;
static struct efi_runtime_map_entry *
-add_sysfs_runtime_map_entry(struct kobject *kobj, int nr)
+add_sysfs_runtime_map_entry(struct kobject *kobj, int nr,
+ efi_memory_desc_t *md)
{
int ret;
struct efi_runtime_map_entry *entry;
@@ -124,8 +121,7 @@ add_sysfs_runtime_map_entry(struct kobject *kobj, int nr)
return ERR_PTR(-ENOMEM);
}
- memcpy(&entry->md, efi_runtime_map + nr * efi_memdesc_size,
- sizeof(efi_memory_desc_t));
+ memcpy(&entry->md, md, sizeof(efi_memory_desc_t));
kobject_init(&entry->kobj, &map_ktype);
entry->kobj.kset = map_kset;
@@ -142,12 +138,12 @@ add_sysfs_runtime_map_entry(struct kobject *kobj, int nr)
int efi_get_runtime_map_size(void)
{
- return nr_efi_runtime_map * efi_memdesc_size;
+ return efi.memmap.nr_map * efi.memmap.desc_size;
}
int efi_get_runtime_map_desc_size(void)
{
- return efi_memdesc_size;
+ return efi.memmap.desc_size;
}
int efi_runtime_map_copy(void *buf, size_t bufsz)
@@ -157,38 +153,33 @@ int efi_runtime_map_copy(void *buf, size_t bufsz)
if (sz > bufsz)
sz = bufsz;
- memcpy(buf, efi_runtime_map, sz);
+ memcpy(buf, efi.memmap.map, sz);
return 0;
}
-void efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size)
-{
- efi_runtime_map = map;
- nr_efi_runtime_map = nr_entries;
- efi_memdesc_size = desc_size;
-}
-
int __init efi_runtime_map_init(struct kobject *efi_kobj)
{
int i, j, ret = 0;
struct efi_runtime_map_entry *entry;
+ efi_memory_desc_t *md;
- if (!efi_runtime_map)
+ if (!efi_enabled(EFI_MEMMAP))
return 0;
- map_entries = kzalloc(nr_efi_runtime_map * sizeof(entry), GFP_KERNEL);
+ map_entries = kzalloc(efi.memmap.nr_map * sizeof(entry), GFP_KERNEL);
if (!map_entries) {
ret = -ENOMEM;
goto out;
}
- for (i = 0; i < nr_efi_runtime_map; i++) {
- entry = add_sysfs_runtime_map_entry(efi_kobj, i);
+ i = 0;
+ for_each_efi_memory_desc(md) {
+ entry = add_sysfs_runtime_map_entry(efi_kobj, i, md);
if (IS_ERR(entry)) {
ret = PTR_ERR(entry);
goto out_add_entry;
}
- *(map_entries + i) = entry;
+ *(map_entries + i++) = entry;
}
return 0;