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Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
Pull x86 microcode loader updates from Ingo Molnar:
 "There are two main changes in this tree:

   - AMD microcode early loading fixes
   - some microcode loader source files reorganization"

* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, microcode: Move to a proper location
  x86, microcode, AMD: Fix early ucode loading
  x86, microcode: Share native MSR accessing variants
  x86, ramdisk: Export relocated ramdisk VA
This commit is contained in:
Linus Torvalds 2014-01-20 12:07:54 -08:00
commit 2bb2c5e235
15 changed files with 206 additions and 123 deletions
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4
arch/x86/Kconfig
View File

@ -1065,10 +1065,6 @@ config MICROCODE_OLD_INTERFACE
def_bool y
depends on MICROCODE
config MICROCODE_INTEL_LIB
def_bool y
depends on MICROCODE_INTEL
config MICROCODE_INTEL_EARLY
def_bool n

15
arch/x86/include/asm/microcode.h
View File

@ -1,6 +1,21 @@
#ifndef _ASM_X86_MICROCODE_H
#define _ASM_X86_MICROCODE_H
#define native_rdmsr(msr, val1, val2) \
do { \
u64 __val = native_read_msr((msr)); \
(void)((val1) = (u32)__val); \
(void)((val2) = (u32)(__val >> 32)); \
} while (0)
#define native_wrmsr(msr, low, high) \
native_write_msr(msr, low, high)
#define native_wrmsrl(msr, val) \
native_write_msr((msr), \
(u32)((u64)(val)), \
(u32)((u64)(val) >> 32))
struct cpu_signature {
unsigned int sig;
unsigned int pf;

7
arch/x86/include/asm/microcode_amd.h
View File

@ -61,11 +61,10 @@ extern int __apply_microcode_amd(struct microcode_amd *mc_amd);
extern int apply_microcode_amd(int cpu);
extern enum ucode_state load_microcode_amd(u8 family, const u8 *data, size_t size);
#define PATCH_MAX_SIZE PAGE_SIZE
extern u8 amd_ucode_patch[PATCH_MAX_SIZE];
#ifdef CONFIG_MICROCODE_AMD_EARLY
#ifdef CONFIG_X86_32
#define MPB_MAX_SIZE PAGE_SIZE
extern u8 amd_bsp_mpb[MPB_MAX_SIZE];
#endif
extern void __init load_ucode_amd_bsp(void);
extern void load_ucode_amd_ap(void);
extern int __init save_microcode_in_initrd_amd(void);

3
arch/x86/include/asm/setup.h
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@ -3,7 +3,6 @@
#include <uapi/asm/setup.h>
#define COMMAND_LINE_SIZE 2048
#include <linux/linkage.h>
@ -29,6 +28,8 @@
#include <asm/bootparam.h>
#include <asm/x86_init.h>
extern u64 relocated_ramdisk;
/* Interrupt control for vSMPowered x86_64 systems */
#ifdef CONFIG_X86_64
void vsmp_init(void);

9
arch/x86/kernel/Makefile
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@ -92,15 +92,6 @@ obj-$(CONFIG_PARAVIRT_CLOCK) += pvclock.o
obj-$(CONFIG_PCSPKR_PLATFORM) += pcspeaker.o
obj-$(CONFIG_MICROCODE_EARLY) += microcode_core_early.o
obj-$(CONFIG_MICROCODE_INTEL_EARLY) += microcode_intel_early.o
obj-$(CONFIG_MICROCODE_INTEL_LIB) += microcode_intel_lib.o
microcode-y := microcode_core.o
microcode-$(CONFIG_MICROCODE_INTEL) += microcode_intel.o
microcode-$(CONFIG_MICROCODE_AMD) += microcode_amd.o
obj-$(CONFIG_MICROCODE_AMD_EARLY) += microcode_amd_early.o
obj-$(CONFIG_MICROCODE) += microcode.o
obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o
obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o

1
arch/x86/kernel/cpu/Makefile
View File

@ -42,6 +42,7 @@ endif
obj-$(CONFIG_X86_MCE) += mcheck/
obj-$(CONFIG_MTRR) += mtrr/
obj-$(CONFIG_MICROCODE) += microcode/
obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o perf_event_amd_ibs.o

7
arch/x86/kernel/cpu/microcode/Makefile Normal file
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@ -0,0 +1,7 @@
microcode-y := core.o
obj-$(CONFIG_MICROCODE) += microcode.o
microcode-$(CONFIG_MICROCODE_INTEL) += intel.o intel_lib.o
microcode-$(CONFIG_MICROCODE_AMD) += amd.o
obj-$(CONFIG_MICROCODE_EARLY) += core_early.o
obj-$(CONFIG_MICROCODE_INTEL_EARLY) += intel_early.o
obj-$(CONFIG_MICROCODE_AMD_EARLY) += amd_early.o

13
arch/x86/kernel/microcode_amd.c → arch/x86/kernel/cpu/microcode/amd.c
View File

@ -182,10 +182,10 @@ int __apply_microcode_amd(struct microcode_amd *mc_amd)
{
u32 rev, dummy;
wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
/* verify patch application was successful */
rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
if (rev != mc_amd->hdr.patch_id)
return -1;
@ -332,6 +332,9 @@ static int verify_and_add_patch(u8 family, u8 *fw, unsigned int leftover)
patch->patch_id = mc_hdr->patch_id;
patch->equiv_cpu = proc_id;
pr_debug("%s: Added patch_id: 0x%08x, proc_id: 0x%04x\n",
__func__, patch->patch_id, proc_id);
/* ... and add to cache. */
update_cache(patch);
@ -390,9 +393,9 @@ enum ucode_state load_microcode_amd(u8 family, const u8 *data, size_t size)
if (cpu_data(smp_processor_id()).cpu_index == boot_cpu_data.cpu_index) {
struct ucode_patch *p = find_patch(smp_processor_id());
if (p) {
memset(amd_bsp_mpb, 0, MPB_MAX_SIZE);
memcpy(amd_bsp_mpb, p->data, min_t(u32, ksize(p->data),
MPB_MAX_SIZE));
memset(amd_ucode_patch, 0, PATCH_MAX_SIZE);
memcpy(amd_ucode_patch, p->data, min_t(u32, ksize(p->data),
PATCH_MAX_SIZE));
}
}
#endif

241
arch/x86/kernel/microcode_amd_early.c → arch/x86/kernel/cpu/microcode/amd_early.c
View File

@ -2,6 +2,7 @@
* Copyright (C) 2013 Advanced Micro Devices, Inc.
*
* Author: Jacob Shin <jacob.shin@amd.com>
* Fixes: Borislav Petkov <bp@suse.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -15,10 +16,18 @@
#include <asm/setup.h>
#include <asm/microcode_amd.h>
static bool ucode_loaded;
/*
* This points to the current valid container of microcode patches which we will
* save from the initrd before jettisoning its contents.
*/
static u8 *container;
static size_t container_size;
static u32 ucode_new_rev;
static unsigned long ucode_offset;
static size_t ucode_size;
u8 amd_ucode_patch[PATCH_MAX_SIZE];
static u16 this_equiv_id;
struct cpio_data ucode_cpio;
/*
* Microcode patch container file is prepended to the initrd in cpio format.
@ -32,9 +41,6 @@ static struct cpio_data __init find_ucode_in_initrd(void)
char *path;
void *start;
size_t size;
unsigned long *uoffset;
size_t *usize;
struct cpio_data cd;
#ifdef CONFIG_X86_32
struct boot_params *p;
@ -47,30 +53,50 @@ static struct cpio_data __init find_ucode_in_initrd(void)
path = (char *)__pa_nodebug(ucode_path);
start = (void *)p->hdr.ramdisk_image;
size = p->hdr.ramdisk_size;
uoffset = (unsigned long *)__pa_nodebug(&ucode_offset);
usize = (size_t *)__pa_nodebug(&ucode_size);
#else
path = ucode_path;
start = (void *)(boot_params.hdr.ramdisk_image + PAGE_OFFSET);
size = boot_params.hdr.ramdisk_size;
uoffset = &ucode_offset;
usize = &ucode_size;
#endif
cd = find_cpio_data(path, start, size, &offset);
if (!cd.data)
return cd;
return find_cpio_data(path, start, size, &offset);
}
if (*(u32 *)cd.data != UCODE_MAGIC) {
cd.data = NULL;
cd.size = 0;
return cd;
static size_t compute_container_size(u8 *data, u32 total_size)
{
size_t size = 0;
u32 *header = (u32 *)data;
if (header[0] != UCODE_MAGIC ||
header[1] != UCODE_EQUIV_CPU_TABLE_TYPE || /* type */
header[2] == 0) /* size */
return size;
size = header[2] + CONTAINER_HDR_SZ;
total_size -= size;
data += size;
while (total_size) {
u16 patch_size;
header = (u32 *)data;
if (header[0] != UCODE_UCODE_TYPE)
break;
/*
* Sanity-check patch size.
*/
patch_size = header[1];
if (patch_size > PATCH_MAX_SIZE)
break;
size += patch_size + SECTION_HDR_SIZE;
data += patch_size + SECTION_HDR_SIZE;
total_size -= patch_size + SECTION_HDR_SIZE;
}
*uoffset = (u8 *)cd.data - (u8 *)start;
*usize = cd.size;
return cd;
return size;
}
/*
@ -85,23 +111,22 @@ static struct cpio_data __init find_ucode_in_initrd(void)
static void apply_ucode_in_initrd(void *ucode, size_t size)
{
struct equiv_cpu_entry *eq;
size_t *cont_sz;
u32 *header;
u8 *data;
u8 *data, **cont;
u16 eq_id = 0;
int offset, left;
u32 rev, eax;
u32 rev, eax, ebx, ecx, edx;
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);
cont_sz = (size_t *)__pa_nodebug(&container_size);
cont = (u8 **)__pa_nodebug(&container);
#else
new_rev = &ucode_new_rev;
uoffset = &ucode_offset;
usize = &ucode_size;
cont_sz = &container_size;
cont = &container;
#endif
data = ucode;
@ -109,23 +134,37 @@ static void apply_ucode_in_initrd(void *ucode, size_t size)
header = (u32 *)data;
/* find equiv cpu table */
if (header[1] != UCODE_EQUIV_CPU_TABLE_TYPE || /* type */
if (header[0] != UCODE_MAGIC ||
header[1] != UCODE_EQUIV_CPU_TABLE_TYPE || /* type */
header[2] == 0) /* size */
return;
eax = cpuid_eax(0x00000001);
eax = 0x00000001;
ecx = 0;
native_cpuid(&eax, &ebx, &ecx, &edx);
while (left > 0) {
eq = (struct equiv_cpu_entry *)(data + CONTAINER_HDR_SZ);
*cont = data;
/* Advance past the container header */
offset = header[2] + CONTAINER_HDR_SZ;
data += offset;
left -= offset;
eq_id = find_equiv_id(eq, eax);
if (eq_id)
if (eq_id) {
this_equiv_id = eq_id;
*cont_sz = compute_container_size(*cont, left + offset);
/*
* truncate how much we need to iterate over in the
* ucode update loop below
*/
left = *cont_sz - offset;
break;
}
/*
* support multiple container files appended together. if this
@ -145,19 +184,18 @@ static void apply_ucode_in_initrd(void *ucode, size_t size)
/* mark where the next microcode container file starts */
offset = data - (u8 *)ucode;
*uoffset += offset;
*usize -= offset;
ucode = data;
}
if (!eq_id) {
*usize = 0;
*cont = NULL;
*cont_sz = 0;
return;
}
/* find ucode and update if needed */
rdmsr(MSR_AMD64_PATCH_LEVEL, rev, eax);
native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, eax);
while (left > 0) {
struct microcode_amd *mc;
@ -168,73 +206,83 @@ static void apply_ucode_in_initrd(void *ucode, size_t size)
break;
mc = (struct microcode_amd *)(data + SECTION_HDR_SIZE);
if (eq_id == mc->hdr.processor_rev_id && rev < mc->hdr.patch_id)
if (__apply_microcode_amd(mc) == 0) {
if (eq_id == mc->hdr.processor_rev_id && rev < mc->hdr.patch_id) {
if (!__apply_microcode_amd(mc)) {
rev = mc->hdr.patch_id;
*new_rev = rev;
/* save ucode patch */
memcpy(amd_ucode_patch, mc,
min_t(u32, header[1], PATCH_MAX_SIZE));
}
}
offset = header[1] + SECTION_HDR_SIZE;
data += offset;
left -= offset;
}
/* mark where this microcode container file ends */
offset = *usize - (data - (u8 *)ucode);
*usize -= offset;
if (!(*new_rev))
*usize = 0;
}
void __init load_ucode_amd_bsp(void)
{
struct cpio_data cd = find_ucode_in_initrd();
if (!cd.data)
struct cpio_data cp;
void **data;
size_t *size;
#ifdef CONFIG_X86_32
data = (void **)__pa_nodebug(&ucode_cpio.data);
size = (size_t *)__pa_nodebug(&ucode_cpio.size);
#else
data = &ucode_cpio.data;
size = &ucode_cpio.size;
#endif
cp = find_ucode_in_initrd();
if (!cp.data)
return;
apply_ucode_in_initrd(cd.data, cd.size);
*data = cp.data;
*size = cp.size;
apply_ucode_in_initrd(cp.data, cp.size);
}
#ifdef CONFIG_X86_32
u8 amd_bsp_mpb[MPB_MAX_SIZE];
/*
* On 32-bit, since AP's early load occurs before paging is turned on, we
* cannot traverse cpu_equiv_table and pcache in kernel heap memory. So during
* cold boot, AP will apply_ucode_in_initrd() just like the BSP. During
* save_microcode_in_initrd_amd() BSP's patch is copied to amd_bsp_mpb, which
* is used upon resume from suspend.
* save_microcode_in_initrd_amd() BSP's patch is copied to amd_ucode_patch,
* which is used upon resume from suspend.
*/
void load_ucode_amd_ap(void)
{
struct microcode_amd *mc;
unsigned long *initrd;
unsigned long *uoffset;
size_t *usize;
void *ucode;
void **ucode;
mc = (struct microcode_amd *)__pa(amd_bsp_mpb);
mc = (struct microcode_amd *)__pa(amd_ucode_patch);
if (mc->hdr.patch_id && mc->hdr.processor_rev_id) {
__apply_microcode_amd(mc);
return;
}
initrd = (unsigned long *)__pa(&initrd_start);
uoffset = (unsigned long *)__pa(&ucode_offset);
usize = (size_t *)__pa(&ucode_size);
ucode = (void *)__pa_nodebug(&container);
usize = (size_t *)__pa_nodebug(&container_size);
if (!*usize || !*initrd)
if (!*ucode || !*usize)
return;
ucode = (void *)((unsigned long)__pa(*initrd) + *uoffset);
apply_ucode_in_initrd(ucode, *usize);
apply_ucode_in_initrd(*ucode, *usize);
}
static void __init collect_cpu_sig_on_bsp(void *arg)
{
unsigned int cpu = smp_processor_id();
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
uci->cpu_sig.sig = cpuid_eax(0x00000001);
}
#else
@ -242,36 +290,54 @@ void load_ucode_amd_ap(void)
{
unsigned int cpu = smp_processor_id();
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
struct equiv_cpu_entry *eq;
struct microcode_amd *mc;
u32 rev, eax;
u16 eq_id;
/* Exit if called on the BSP. */
if (!cpu)
return;
if (!container)
return;
rdmsr(MSR_AMD64_PATCH_LEVEL, rev, eax);
eax = cpuid_eax(0x00000001);
uci->cpu_sig.rev = rev;
uci->cpu_sig.sig = eax;
if (cpu && !ucode_loaded) {
void *ucode;
eax = cpuid_eax(0x00000001);
eq = (struct equiv_cpu_entry *)(container + CONTAINER_HDR_SZ);
if (!ucode_size || !initrd_start)
eq_id = find_equiv_id(eq, eax);
if (!eq_id)
return;
if (eq_id == this_equiv_id) {
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;
}
} else {
if (!ucode_cpio.data)
return;
ucode = (void *)(initrd_start + ucode_offset);
eax = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff);
if (load_microcode_amd(eax, ucode, ucode_size) != UCODE_OK)
return;
ucode_loaded = true;
/*
* AP has a different equivalence ID than BSP, looks like
* mixed-steppings silicon so go through the ucode blob anew.
*/
apply_ucode_in_initrd(ucode_cpio.data, ucode_cpio.size);
}
apply_microcode_amd(cpu);
}
#endif
int __init save_microcode_in_initrd_amd(void)
{
enum ucode_state ret;
void *ucode;
u32 eax;
#ifdef CONFIG_X86_32
@ -280,22 +346,35 @@ int __init save_microcode_in_initrd_amd(void)
if (!uci->cpu_sig.sig)
smp_call_function_single(bsp, collect_cpu_sig_on_bsp, NULL, 1);
/*
* Take into account the fact that the ramdisk might get relocated
* and therefore we need to recompute the container's position in
* virtual memory space.
*/
container = (u8 *)(__va((u32)relocated_ramdisk) +
((u32)container - boot_params.hdr.ramdisk_image));
#endif
if (ucode_new_rev)
pr_info("microcode: updated early to new patch_level=0x%08x\n",
ucode_new_rev);
if (ucode_loaded || !ucode_size || !initrd_start)
return 0;
if (!container)
return -EINVAL;
ucode = (void *)(initrd_start + ucode_offset);
eax = cpuid_eax(0x00000001);
eax = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff);
ret = load_microcode_amd(eax, ucode, ucode_size);
ret = load_microcode_amd(eax, container, container_size);
if (ret != UCODE_OK)
return -EINVAL;
ucode_loaded = true;
/*
* This will be freed any msec now, stash patches for the current
* family and switch to patch cache for cpu hotplug, etc later.
*/
container = NULL;
container_size = 0;
return 0;
}

0
arch/x86/kernel/microcode_core.c → arch/x86/kernel/cpu/microcode/core.c
View File

0
arch/x86/kernel/microcode_core_early.c → arch/x86/kernel/cpu/microcode/core_early.c
View File

0
arch/x86/kernel/microcode_intel.c → arch/x86/kernel/cpu/microcode/intel.c
View File

10
arch/x86/kernel/microcode_intel_early.c → arch/x86/kernel/cpu/microcode/intel_early.c
View File

@ -365,16 +365,6 @@ get_matching_model_microcode(int cpu, unsigned long start,
return state;
}
#define native_rdmsr(msr, val1, val2) \
do { \
u64 __val = native_read_msr((msr)); \
(void)((val1) = (u32)__val); \
(void)((val2) = (u32)(__val >> 32)); \
} while (0)
#define native_wrmsr(msr, low, high) \
native_write_msr(msr, low, high);
static int collect_cpu_info_early(struct ucode_cpu_info *uci)
{
unsigned int val[2];

0
arch/x86/kernel/microcode_intel_lib.c → arch/x86/kernel/cpu/microcode/intel_lib.c
View File

19
arch/x86/kernel/setup.c
View File

@ -295,6 +295,8 @@ static void __init reserve_brk(void)
_brk_start = 0;
}
u64 relocated_ramdisk;
#ifdef CONFIG_BLK_DEV_INITRD
static u64 __init get_ramdisk_image(void)
@ -321,25 +323,24 @@ static void __init relocate_initrd(void)
u64 ramdisk_image = get_ramdisk_image();
u64 ramdisk_size = get_ramdisk_size();
u64 area_size = PAGE_ALIGN(ramdisk_size);
u64 ramdisk_here;
unsigned long slop, clen, mapaddr;
char *p, *q;
/* We need to move the initrd down into directly mapped mem */
ramdisk_here = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
area_size, PAGE_SIZE);
relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
area_size, PAGE_SIZE);
if (!ramdisk_here)
if (!relocated_ramdisk)
panic("Cannot find place for new RAMDISK of size %lld\n",
ramdisk_size);
ramdisk_size);
/* Note: this includes all the mem currently occupied by
the initrd, we rely on that fact to keep the data intact. */
memblock_reserve(ramdisk_here, area_size);
initrd_start = ramdisk_here + PAGE_OFFSET;
memblock_reserve(relocated_ramdisk, area_size);
initrd_start = relocated_ramdisk + PAGE_OFFSET;
initrd_end = initrd_start + ramdisk_size;
printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
ramdisk_here, ramdisk_here + ramdisk_size - 1);
relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
q = (char *)initrd_start;
@ -363,7 +364,7 @@ static void __init relocate_initrd(void)
printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
" [mem %#010llx-%#010llx]\n",
ramdisk_image, ramdisk_image + ramdisk_size - 1,
ramdisk_here, ramdisk_here + ramdisk_size - 1);
relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
}
static void __init early_reserve_initrd(void)