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x86, microcode, amd: Allow multiple families' bin files appended together

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Add support for parsing through multiple families' microcode patch
container binary files appended together when early loading. This is
already supported on Intel.

Reported-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Link: http://lkml.kernel.org/r/1370463236-2115-3-git-send-email-jacob.shin@amd.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Jacob Shin 2013-06-05 15:13:56 -05:00 committed by H. Peter Anvin
parent 275bbe2e29
commit cd1c32ca96
1 changed files with 42 additions and 8 deletions
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50
arch/x86/kernel/microcode_amd_early.c
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@ -87,15 +87,21 @@ static void __cpuinit apply_ucode_in_initrd(void *ucode, size_t size)
struct equiv_cpu_entry *eq;
u32 *header;
u8 *data;
u16 eq_id;
u16 eq_id = 0;
int offset, left;
u32 rev, dummy;
u32 rev, eax;
u32 *new_rev;
unsigned long *uoffset;
size_t *usize;
#ifdef CONFIG_X86_32
new_rev = (u32 *)__pa_nodebug(&ucode_new_rev);
uoffset = (unsigned long *)__pa_nodebug(&ucode_offset);
usize = (size_t *)__pa_nodebug(&ucode_size);
#else
new_rev = &ucode_new_rev;
uoffset = &ucode_offset;
usize = &ucode_size;
#endif
data = ucode;
@ -108,18 +114,46 @@ static void __cpuinit apply_ucode_in_initrd(void *ucode, size_t size)
header[2] == 0) /* size */
return;
eq = (struct equiv_cpu_entry *)(data + CONTAINER_HDR_SZ);
offset = header[2] + CONTAINER_HDR_SZ;
data += offset;
left -= offset;
eax = cpuid_eax(0x00000001);
while (left > 0) {
eq = (struct equiv_cpu_entry *)(data + CONTAINER_HDR_SZ);
offset = header[2] + CONTAINER_HDR_SZ;
data += offset;
left -= offset;
eq_id = find_equiv_id(eq, eax);
if (eq_id)
break;
/*
* support multiple container files appended together. if this
* one does not have a matching equivalent cpu entry, we fast
* forward to the next container file.
*/
while (left > 0) {
header = (u32 *)data;
if (header[0] == UCODE_MAGIC &&
header[1] == UCODE_EQUIV_CPU_TABLE_TYPE)
break;
offset = header[1] + SECTION_HDR_SIZE;
data += offset;
left -= offset;
}
offset = data - (u8 *)ucode;
*uoffset += offset;
*usize -= offset;
}
eq_id = find_equiv_id(eq, cpuid_eax(0x00000001));
if (!eq_id)
return;
/* find ucode and update if needed */
rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
rdmsr(MSR_AMD64_PATCH_LEVEL, rev, eax);
while (left > 0) {
struct microcode_amd *mc;