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 <[email protected]> Signed-off-by: Jacob Shin <[email protected]> --- 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; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
