Commit-ID: cd1c32ca969ebfd65e61312c988223bb14f09c2e Gitweb: http://git.kernel.org/tip/cd1c32ca969ebfd65e61312c988223bb14f09c2e Author: Jacob Shin <jacob.shin@xxxxxxx> AuthorDate: Wed, 5 Jun 2013 15:13:56 -0500 Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> CommitDate: Wed, 5 Jun 2013 13:56:55 -0700 x86, microcode, amd: Allow multiple families' bin files appended together 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@xxxxxxxxxx> Signed-off-by: Jacob Shin <jacob.shin@xxxxxxx> Link: http://lkml.kernel.org/r/1370463236-2115-3-git-send-email-jacob.shin@xxxxxxx Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> --- arch/x86/kernel/microcode_amd_early.c | 50 +++++++++++++++++++++++++++++------ 1 file changed, 42 insertions(+), 8 deletions(-) diff --git a/arch/x86/kernel/microcode_amd_early.c b/arch/x86/kernel/microcode_amd_early.c index 7db1e16..4c593c2 100644 --- a/arch/x86/kernel/microcode_amd_early.c +++ b/arch/x86/kernel/microcode_amd_early.c @@ -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; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html