Commit fbae4ba8 authored by Borislav Petkov's avatar Borislav Petkov

x86, microcode: Reload microcode on resume

Normally, we do reapply microcode on resume. However, in the cases where
that microcode comes from the early loader and the late loader hasn't
been utilized yet, there's no easy way for us to go and apply the patch
applied during boot by the early loader.

Thus, reuse the patch stashed by the early loader for the BSP.
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
parent a18a0f68
...@@ -78,6 +78,7 @@ static inline void __exit exit_amd_microcode(void) {} ...@@ -78,6 +78,7 @@ static inline void __exit exit_amd_microcode(void) {}
extern void __init load_ucode_bsp(void); extern void __init load_ucode_bsp(void);
extern void load_ucode_ap(void); extern void load_ucode_ap(void);
extern int __init save_microcode_in_initrd(void); extern int __init save_microcode_in_initrd(void);
void reload_early_microcode(void);
#else #else
static inline void __init load_ucode_bsp(void) {} static inline void __init load_ucode_bsp(void) {}
static inline void load_ucode_ap(void) {} static inline void load_ucode_ap(void) {}
...@@ -85,6 +86,7 @@ static inline int __init save_microcode_in_initrd(void) ...@@ -85,6 +86,7 @@ static inline int __init save_microcode_in_initrd(void)
{ {
return 0; return 0;
} }
static inline void reload_early_microcode(void) {}
#endif #endif
#endif /* _ASM_X86_MICROCODE_H */ #endif /* _ASM_X86_MICROCODE_H */
...@@ -68,10 +68,12 @@ extern u8 amd_ucode_patch[PATCH_MAX_SIZE]; ...@@ -68,10 +68,12 @@ extern u8 amd_ucode_patch[PATCH_MAX_SIZE];
extern void __init load_ucode_amd_bsp(void); extern void __init load_ucode_amd_bsp(void);
extern void load_ucode_amd_ap(void); extern void load_ucode_amd_ap(void);
extern int __init save_microcode_in_initrd_amd(void); extern int __init save_microcode_in_initrd_amd(void);
void reload_ucode_amd(void);
#else #else
static inline void __init load_ucode_amd_bsp(void) {} static inline void __init load_ucode_amd_bsp(void) {}
static inline void load_ucode_amd_ap(void) {} static inline void load_ucode_amd_ap(void) {}
static inline int __init save_microcode_in_initrd_amd(void) { return -EINVAL; } static inline int __init save_microcode_in_initrd_amd(void) { return -EINVAL; }
void reload_ucode_amd(void) {}
#endif #endif
#endif /* _ASM_X86_MICROCODE_AMD_H */ #endif /* _ASM_X86_MICROCODE_AMD_H */
...@@ -68,11 +68,13 @@ extern void __init load_ucode_intel_bsp(void); ...@@ -68,11 +68,13 @@ extern void __init load_ucode_intel_bsp(void);
extern void load_ucode_intel_ap(void); extern void load_ucode_intel_ap(void);
extern void show_ucode_info_early(void); extern void show_ucode_info_early(void);
extern int __init save_microcode_in_initrd_intel(void); extern int __init save_microcode_in_initrd_intel(void);
void reload_ucode_intel(void);
#else #else
static inline __init void load_ucode_intel_bsp(void) {} static inline __init void load_ucode_intel_bsp(void) {}
static inline void load_ucode_intel_ap(void) {} static inline void load_ucode_intel_ap(void) {}
static inline void show_ucode_info_early(void) {} static inline void show_ucode_info_early(void) {}
static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; } static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
static inline void reload_ucode_intel(void) {}
#endif #endif
#if defined(CONFIG_MICROCODE_INTEL_EARLY) && defined(CONFIG_HOTPLUG_CPU) #if defined(CONFIG_MICROCODE_INTEL_EARLY) && defined(CONFIG_HOTPLUG_CPU)
......
...@@ -402,3 +402,21 @@ int __init save_microcode_in_initrd_amd(void) ...@@ -402,3 +402,21 @@ int __init save_microcode_in_initrd_amd(void)
return retval; 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);
}
}
}
...@@ -466,13 +466,7 @@ static void mc_bp_resume(void) ...@@ -466,13 +466,7 @@ static void mc_bp_resume(void)
if (uci->valid && uci->mc) if (uci->valid && uci->mc)
microcode_ops->apply_microcode(cpu); microcode_ops->apply_microcode(cpu);
else if (!uci->mc) else if (!uci->mc)
/* reload_early_microcode();
* 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();
} }
static struct syscore_ops mc_syscore_ops = { static struct syscore_ops mc_syscore_ops = {
......
...@@ -176,3 +176,24 @@ int __init save_microcode_in_initrd(void) ...@@ -176,3 +176,24 @@ int __init save_microcode_in_initrd(void)
return 0; 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;
}
}
...@@ -34,6 +34,8 @@ static struct mc_saved_data { ...@@ -34,6 +34,8 @@ static struct mc_saved_data {
struct microcode_intel **mc_saved; struct microcode_intel **mc_saved;
} mc_saved_data; } mc_saved_data;
static struct microcode_intel bsp_patch;
static enum ucode_state static enum ucode_state
generic_load_microcode_early(struct microcode_intel **mc_saved_p, generic_load_microcode_early(struct microcode_intel **mc_saved_p,
unsigned int mc_saved_count, unsigned int mc_saved_count,
...@@ -650,7 +652,7 @@ static inline void print_ucode(struct ucode_cpu_info *uci) ...@@ -650,7 +652,7 @@ static inline void print_ucode(struct ucode_cpu_info *uci)
} }
#endif #endif
static int apply_microcode_early(struct ucode_cpu_info *uci) static int apply_microcode_early(struct ucode_cpu_info *uci, bool early)
{ {
struct microcode_intel *mc_intel; struct microcode_intel *mc_intel;
unsigned int val[2]; unsigned int val[2];
...@@ -679,7 +681,10 @@ static int apply_microcode_early(struct ucode_cpu_info *uci) ...@@ -679,7 +681,10 @@ static int apply_microcode_early(struct ucode_cpu_info *uci)
#endif #endif
uci->cpu_sig.rev = val[1]; 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; return 0;
} }
...@@ -712,14 +717,22 @@ _load_ucode_intel_bsp(struct mc_saved_data *mc_saved_data, ...@@ -712,14 +717,22 @@ _load_ucode_intel_bsp(struct mc_saved_data *mc_saved_data,
unsigned long *mc_saved_in_initrd, unsigned long *mc_saved_in_initrd,
unsigned long initrd_start_early, unsigned long initrd_start_early,
unsigned long initrd_end_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); collect_cpu_info_early(uci);
scan_microcode(initrd_start_early, initrd_end_early, mc_saved_data, scan_microcode(initrd_start_early, initrd_end_early, mc_saved_data,
mc_saved_in_initrd, uci); mc_saved_in_initrd, uci);
load_microcode(mc_saved_data, mc_saved_in_initrd,
initrd_start_early, uci); ret = load_microcode(mc_saved_data, mc_saved_in_initrd,
apply_microcode_early(uci); initrd_start_early, uci);
if (ret == UCODE_OK) {
apply_microcode_early(uci, true);
memcpy(bsp, uci->mc, sizeof(*bsp));
}
} }
void __init void __init
...@@ -728,10 +741,12 @@ load_ucode_intel_bsp(void) ...@@ -728,10 +741,12 @@ load_ucode_intel_bsp(void)
u64 ramdisk_image, ramdisk_size; u64 ramdisk_image, ramdisk_size;
unsigned long initrd_start_early, initrd_end_early; unsigned long initrd_start_early, initrd_end_early;
struct ucode_cpu_info uci; struct ucode_cpu_info uci;
struct microcode_intel *bsp_p;
#ifdef CONFIG_X86_32 #ifdef CONFIG_X86_32
struct boot_params *boot_params_p; struct boot_params *boot_params_p;
boot_params_p = (struct boot_params *)__pa_nodebug(&boot_params); 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_image = boot_params_p->hdr.ramdisk_image;
ramdisk_size = boot_params_p->hdr.ramdisk_size; ramdisk_size = boot_params_p->hdr.ramdisk_size;
initrd_start_early = ramdisk_image; initrd_start_early = ramdisk_image;
...@@ -740,15 +755,17 @@ load_ucode_intel_bsp(void) ...@@ -740,15 +755,17 @@ load_ucode_intel_bsp(void)
_load_ucode_intel_bsp( _load_ucode_intel_bsp(
(struct mc_saved_data *)__pa_nodebug(&mc_saved_data), (struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
(unsigned long *)__pa_nodebug(&mc_saved_in_initrd), (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 #else
bsp_p = &bsp_patch;
ramdisk_image = boot_params.hdr.ramdisk_image; ramdisk_image = boot_params.hdr.ramdisk_image;
ramdisk_size = boot_params.hdr.ramdisk_size; ramdisk_size = boot_params.hdr.ramdisk_size;
initrd_start_early = ramdisk_image + PAGE_OFFSET; initrd_start_early = ramdisk_image + PAGE_OFFSET;
initrd_end_early = initrd_start_early + ramdisk_size; initrd_end_early = initrd_start_early + ramdisk_size;
_load_ucode_intel_bsp(&mc_saved_data, mc_saved_in_initrd, _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 #endif
} }
...@@ -782,5 +799,17 @@ void load_ucode_intel_ap(void) ...@@ -782,5 +799,17 @@ void load_ucode_intel_ap(void)
collect_cpu_info_early(&uci); collect_cpu_info_early(&uci);
load_microcode(mc_saved_data_p, mc_saved_in_initrd_p, load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
initrd_start_addr, &uci); initrd_start_addr, &uci);
apply_microcode_early(&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);
} }
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