GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cpu/intel/microcode: Add caching layer in intel_microcode_find 

Cache the found microcode for faster subsequent accesses.

Change-Id: Ic40d57964600f8f20ddb26c7d1691b043fd89f29
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49896
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Patrick Rudolph 2021-01-25 09:29:38 +01:00 committed by Patrick Georgi
parent 27c9fcfc48
commit 0bea950a47
2 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/cpu/intel/microcode/microcode.c
View File

@ -119,13 +119,16 @@ uint32_t get_microcode_checksum(const void *microcode)
const void *intel_microcode_find(void)
{
const struct microcode *ucode_updates;
static const struct microcode *ucode_updates;
size_t microcode_len;
u32 eax;
u32 pf, rev, sig, update_size;
unsigned int x86_model, x86_family;
msr_t msr;
if (ucode_updates)
return ucode_updates;
ucode_updates = cbfs_map(MICROCODE_CBFS_FILE, &microcode_len);
if (ucode_updates == NULL)
return NULL;
@ -173,6 +176,8 @@ const void *intel_microcode_find(void)
microcode_len -= update_size;
}
ucode_updates = NULL;
return NULL;
}

4
src/include/cpu/intel/microcode.h
View File

@ -6,8 +6,10 @@
void intel_update_microcode_from_cbfs(void);
/* Find a microcode that matches the revision and platform family returning
* NULL if none found. */
* NULL if none found. The found microcode is cached for faster access on
* subsequent calls of this function. */
const void *intel_microcode_find(void);
/* It is up to the caller to determine if parallel loading is possible as
* well as ensuring the microcode matches the family and revision (i.e. with
* intel_microcode_find()). */