diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index 64dc362506b789ca3ea9986669e111da2d9ccea8..201b520521ed74b6e35b63cda531ae58f75ec674 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -78,6 +78,7 @@ static inline void __exit exit_amd_microcode(void) {}
extern void __init load_ucode_bsp(void);
extern void load_ucode_ap(void);
extern int __init save_microcode_in_initrd(void);
+void reload_early_microcode(void);
#else
static inline void __init load_ucode_bsp(void) {}
static inline void load_ucode_ap(void) {}
@@ -85,6 +86,7 @@ static inline int __init save_microcode_in_initrd(void)
{
return 0;
}
+static inline void reload_early_microcode(void) {}
#endif
#endif /* _ASM_X86_MICROCODE_H */
diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
index 48a48024ebe45ff2db7d393b539b80c4eac7d828..af935397e053e4a504daed8c14cfc06686a08794 100644
--- a/arch/x86/include/asm/microcode_amd.h
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -68,10 +68,12 @@ extern u8 amd_ucode_patch[PATCH_MAX_SIZE];
extern void __init load_ucode_amd_bsp(void);
extern void load_ucode_amd_ap(void);
extern int __init save_microcode_in_initrd_amd(void);
+void reload_ucode_amd(void);
#else
static inline void __init load_ucode_amd_bsp(void) {}
static inline void load_ucode_amd_ap(void) {}
static inline int __init save_microcode_in_initrd_amd(void) { return -EINVAL; }
+void reload_ucode_amd(void) {}
#endif
#endif /* _ASM_X86_MICROCODE_AMD_H */
diff --git a/arch/x86/include/asm/microcode_intel.h b/arch/x86/include/asm/microcode_intel.h
index bbe296e0bce1995ca8f9324b801ef09714e6399c..dd4c20043ce75be7545e963dd98ba38ce662396e 100644
--- a/arch/x86/include/asm/microcode_intel.h
+++ b/arch/x86/include/asm/microcode_intel.h
@@ -68,11 +68,13 @@ extern void __init load_ucode_intel_bsp(void);
extern void load_ucode_intel_ap(void);
extern void show_ucode_info_early(void);
extern int __init save_microcode_in_initrd_intel(void);
+void reload_ucode_intel(void);
#else
static inline __init void load_ucode_intel_bsp(void) {}
static inline void load_ucode_intel_ap(void) {}
static inline void show_ucode_info_early(void) {}
static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
+static inline void reload_ucode_intel(void) {}
#endif
#if defined(CONFIG_MICROCODE_INTEL_EARLY) && defined(CONFIG_HOTPLUG_CPU)
diff --git a/arch/x86/kernel/cpu/microcode/amd_early.c b/arch/x86/kernel/cpu/microcode/amd_early.c
index 3d988a30a21d13d02ceb1e709fe9ea7862c8a072..737737edbd1ef5bbc478cf2b6f898f25c231ea81 100644
--- a/arch/x86/kernel/cpu/microcode/amd_early.c
+++ b/arch/x86/kernel/cpu/microcode/amd_early.c
@@ -402,3 +402,21 @@ int __init save_microcode_in_initrd_amd(void)
return retval;
}
+
+void reload_ucode_amd(void)
+{
+ struct microcode_amd *mc;
+ u32 rev, eax;
+
+ rdmsr(MSR_AMD64_PATCH_LEVEL, rev, eax);
+
+ mc = (struct microcode_amd *)amd_ucode_patch;
+
+ if (mc && rev < mc->hdr.patch_id) {
+ if (!__apply_microcode_amd(mc)) {
+ ucode_new_rev = mc->hdr.patch_id;
+ pr_info("microcode: reload patch_level=0x%08x\n",
+ ucode_new_rev);
+ }
+ }
+}
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 2ce9051174e608381c6a91171e7e3d0d5a6a44ca..15c29096136ba5e071c213d1412004740aa1f459 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -466,13 +466,7 @@ static void mc_bp_resume(void)
if (uci->valid && uci->mc)
microcode_ops->apply_microcode(cpu);
else if (!uci->mc)
- /*
- * We might resume and not have applied late microcode but still
- * have a newer patch stashed from the early loader. We don't
- * have it in uci->mc so we have to load it the same way we're
- * applying patches early on the APs.
- */
- load_ucode_ap();
+ reload_early_microcode();
}
static struct syscore_ops mc_syscore_ops = {
@@ -557,7 +551,7 @@ static int __init microcode_init(void)
struct cpuinfo_x86 *c = &cpu_data(0);
int error;
- if (dis_ucode_ldr)
+ if (paravirt_enabled() || dis_ucode_ldr)
return 0;
if (c->x86_vendor == X86_VENDOR_INTEL)
diff --git a/arch/x86/kernel/cpu/microcode/core_early.c b/arch/x86/kernel/cpu/microcode/core_early.c
index 2c017f242a78144ba18499f52aa5ca0c069aa880..d45df4bd16abec23e9725132ab2f9e649237f564 100644
--- a/arch/x86/kernel/cpu/microcode/core_early.c
+++ b/arch/x86/kernel/cpu/microcode/core_early.c
@@ -176,3 +176,24 @@ int __init save_microcode_in_initrd(void)
return 0;
}
+
+void reload_early_microcode(void)
+{
+ int vendor, x86;
+
+ vendor = x86_vendor();
+ x86 = x86_family();
+
+ switch (vendor) {
+ case X86_VENDOR_INTEL:
+ if (x86 >= 6)
+ reload_ucode_intel();
+ break;
+ case X86_VENDOR_AMD:
+ if (x86 >= 0x10)
+ reload_ucode_amd();
+ break;
+ default:
+ break;
+ }
+}
diff --git a/arch/x86/kernel/cpu/microcode/intel_early.c b/arch/x86/kernel/cpu/microcode/intel_early.c
index b88343f7a3b321f04a1ca03db587b43051aeba89..f04d0d6638cad1120e00124992260f7b36377f19 100644
--- a/arch/x86/kernel/cpu/microcode/intel_early.c
+++ b/arch/x86/kernel/cpu/microcode/intel_early.c
@@ -34,6 +34,8 @@ static struct mc_saved_data {
struct microcode_intel **mc_saved;
} mc_saved_data;
+static struct microcode_intel bsp_patch;
+
static enum ucode_state
generic_load_microcode_early(struct microcode_intel **mc_saved_p,
unsigned int mc_saved_count,
@@ -650,8 +652,7 @@ static inline void print_ucode(struct ucode_cpu_info *uci)
}
#endif
-static int apply_microcode_early(struct mc_saved_data *mc_saved_data,
- struct ucode_cpu_info *uci)
+static int apply_microcode_early(struct ucode_cpu_info *uci, bool early)
{
struct microcode_intel *mc_intel;
unsigned int val[2];
@@ -680,7 +681,10 @@ static int apply_microcode_early(struct mc_saved_data *mc_saved_data,
#endif
uci->cpu_sig.rev = val[1];
- print_ucode(uci);
+ if (early)
+ print_ucode(uci);
+ else
+ print_ucode_info(uci, mc_intel->hdr.date);
return 0;
}
@@ -713,14 +717,22 @@ _load_ucode_intel_bsp(struct mc_saved_data *mc_saved_data,
unsigned long *mc_saved_in_initrd,
unsigned long initrd_start_early,
unsigned long initrd_end_early,
- struct ucode_cpu_info *uci)
+ struct ucode_cpu_info *uci,
+ struct microcode_intel *bsp)
{
+ enum ucode_state ret;
+
collect_cpu_info_early(uci);
scan_microcode(initrd_start_early, initrd_end_early, mc_saved_data,
mc_saved_in_initrd, uci);
- load_microcode(mc_saved_data, mc_saved_in_initrd,
- initrd_start_early, uci);
- apply_microcode_early(mc_saved_data, uci);
+
+ ret = load_microcode(mc_saved_data, mc_saved_in_initrd,
+ initrd_start_early, uci);
+
+ if (ret == UCODE_OK) {
+ apply_microcode_early(uci, true);
+ memcpy(bsp, uci->mc, sizeof(*bsp));
+ }
}
void __init
@@ -729,10 +741,12 @@ load_ucode_intel_bsp(void)
u64 ramdisk_image, ramdisk_size;
unsigned long initrd_start_early, initrd_end_early;
struct ucode_cpu_info uci;
+ struct microcode_intel *bsp_p;
#ifdef CONFIG_X86_32
struct boot_params *boot_params_p;
boot_params_p = (struct boot_params *)__pa_nodebug(&boot_params);
+ bsp_p = (struct microcode_intel *)__pa_nodebug(&bsp_patch);
ramdisk_image = boot_params_p->hdr.ramdisk_image;
ramdisk_size = boot_params_p->hdr.ramdisk_size;
initrd_start_early = ramdisk_image;
@@ -741,15 +755,17 @@ load_ucode_intel_bsp(void)
_load_ucode_intel_bsp(
(struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
(unsigned long *)__pa_nodebug(&mc_saved_in_initrd),
- initrd_start_early, initrd_end_early, &uci);
+ initrd_start_early, initrd_end_early, &uci, bsp_p);
#else
+ bsp_p = &bsp_patch;
ramdisk_image = boot_params.hdr.ramdisk_image;
ramdisk_size = boot_params.hdr.ramdisk_size;
initrd_start_early = ramdisk_image + PAGE_OFFSET;
initrd_end_early = initrd_start_early + ramdisk_size;
_load_ucode_intel_bsp(&mc_saved_data, mc_saved_in_initrd,
- initrd_start_early, initrd_end_early, &uci);
+ initrd_start_early, initrd_end_early,
+ &uci, bsp_p);
#endif
}
@@ -783,5 +799,17 @@ void load_ucode_intel_ap(void)
collect_cpu_info_early(&uci);
load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
initrd_start_addr, &uci);
- apply_microcode_early(mc_saved_data_p, &uci);
+ apply_microcode_early(&uci, true);
+}
+
+void reload_ucode_intel(void)
+{
+ struct ucode_cpu_info uci;
+
+ if (!bsp_patch.hdr.rev)
+ return;
+
+ uci.mc = &bsp_patch;
+
+ apply_microcode_early(&uci, false);
}