From bdcfd44fb5b5fb8fd660e7f93f1095c507481024 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Sat, 16 Apr 2016 15:30:54 -0300
Subject: Linux-libre 4.5.1-gnu
---
arch/x86/kernel/cpu/microcode/intel.c | 38 ++++++++++++++++++-----------------
1 file changed, 20 insertions(+), 18 deletions(-)
(limited to 'arch/x86/kernel/cpu/microcode')
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index de8a164a6..f9c7f3302 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -551,10 +551,14 @@ scan_microcode(struct mc_saved_data *mc_saved_data, unsigned long *initrd,
cd.data = NULL;
cd.size = 0;
- cd = find_cpio_data(p, (void *)start, size, &offset);
- if (!cd.data) {
+ /* try built-in microcode if no initrd */
+ if (!size) {
if (!load_builtin_intel_microcode(&cd))
return UCODE_ERROR;
+ } else {
+ cd = find_cpio_data(p, (void *)start, size, &offset);
+ if (!cd.data)
+ return UCODE_ERROR;
}
return get_matching_model_microcode(0, start, cd.data, cd.size,
@@ -690,7 +694,7 @@ int __init save_microcode_in_initrd_intel(void)
if (count == 0)
return ret;
- copy_initrd_ptrs(mc_saved, mc_saved_in_initrd, initrd_start, count);
+ copy_initrd_ptrs(mc_saved, mc_saved_in_initrd, get_initrd_start(), count);
ret = save_microcode(&mc_saved_data, mc_saved, count);
if (ret)
pr_err("Cannot save microcode patches from initrd.\n");
@@ -728,16 +732,20 @@ void __init load_ucode_intel_bsp(void)
struct boot_params *p;
p = (struct boot_params *)__pa_nodebug(&boot_params);
- start = p->hdr.ramdisk_image;
size = p->hdr.ramdisk_size;
- _load_ucode_intel_bsp(
- (struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
- (unsigned long *)__pa_nodebug(&mc_saved_in_initrd),
- start, size);
+ /*
+ * Set start only if we have an initrd image. We cannot use initrd_start
+ * because it is not set that early yet.
+ */
+ start = (size ? p->hdr.ramdisk_image : 0);
+
+ _load_ucode_intel_bsp((struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
+ (unsigned long *)__pa_nodebug(&mc_saved_in_initrd),
+ start, size);
#else
- start = boot_params.hdr.ramdisk_image + PAGE_OFFSET;
size = boot_params.hdr.ramdisk_size;
+ start = (size ? boot_params.hdr.ramdisk_image + PAGE_OFFSET : 0);
_load_ucode_intel_bsp(&mc_saved_data, mc_saved_in_initrd, start, size);
#endif
@@ -748,20 +756,14 @@ void load_ucode_intel_ap(void)
struct mc_saved_data *mc_saved_data_p;
struct ucode_cpu_info uci;
unsigned long *mc_saved_in_initrd_p;
- unsigned long initrd_start_addr;
enum ucode_state ret;
#ifdef CONFIG_X86_32
- unsigned long *initrd_start_p;
- mc_saved_in_initrd_p =
- (unsigned long *)__pa_nodebug(mc_saved_in_initrd);
+ mc_saved_in_initrd_p = (unsigned long *)__pa_nodebug(mc_saved_in_initrd);
mc_saved_data_p = (struct mc_saved_data *)__pa_nodebug(&mc_saved_data);
- initrd_start_p = (unsigned long *)__pa_nodebug(&initrd_start);
- initrd_start_addr = (unsigned long)__pa_nodebug(*initrd_start_p);
#else
- mc_saved_data_p = &mc_saved_data;
mc_saved_in_initrd_p = mc_saved_in_initrd;
- initrd_start_addr = initrd_start;
+ mc_saved_data_p = &mc_saved_data;
#endif
/*
@@ -773,7 +775,7 @@ void load_ucode_intel_ap(void)
collect_cpu_info_early(&uci);
ret = load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
- initrd_start_addr, &uci);
+ get_initrd_start_addr(), &uci);
if (ret != UCODE_OK)
return;
--
cgit v1.2.3-54-g00ecf