forked from luck/tmp_suning_uos_patched
Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, microcode, AMD: Update copyrights x86, microcode, AMD: Exit early on success x86, microcode, AMD: Simplify ucode verification x86, microcode, AMD: Add a reusable buffer x86, microcode, AMD: Add a vendor-specific exit function
This commit is contained in:
Linus Torvalds
commit
82406da4a6
|
|
@ -48,6 +48,7 @@ static inline struct microcode_ops * __init init_intel_microcode(void)
|
|||
|
||||
#ifdef CONFIG_MICROCODE_AMD
|
||||
extern struct microcode_ops * __init init_amd_microcode(void);
|
||||
extern void __exit exit_amd_microcode(void);
|
||||
|
||||
static inline void get_ucode_data(void *to, const u8 *from, size_t n)
|
||||
{
|
||||
|
|
@ -59,6 +60,7 @@ static inline struct microcode_ops * __init init_amd_microcode(void)
|
|||
{
|
||||
return NULL;
|
||||
}
|
||||
static inline void __exit exit_amd_microcode(void) {}
|
||||
#endif
|
||||
|
||||
#endif /* _ASM_X86_MICROCODE_H */
|
||||
|
|
|
|||
|
|
@ -1,14 +1,18 @@
|
|||
/*
|
||||
* AMD CPU Microcode Update Driver for Linux
|
||||
* Copyright (C) 2008 Advanced Micro Devices Inc.
|
||||
* Copyright (C) 2008-2011 Advanced Micro Devices Inc.
|
||||
*
|
||||
* Author: Peter Oruba <peter.oruba@amd.com>
|
||||
*
|
||||
* Based on work by:
|
||||
* Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
|
||||
*
|
||||
* This driver allows to upgrade microcode on AMD
|
||||
* family 0x10 and 0x11 processors.
|
||||
* Maintainers:
|
||||
* Andreas Herrmann <andreas.herrmann3@amd.com>
|
||||
* Borislav Petkov <borislav.petkov@amd.com>
|
||||
*
|
||||
* This driver allows to upgrade microcode on F10h AMD
|
||||
* CPUs and later.
|
||||
*
|
||||
* Licensed under the terms of the GNU General Public
|
||||
* License version 2. See file COPYING for details.
|
||||
|
|
@ -71,6 +75,9 @@ struct microcode_amd {
|
|||
|
||||
static struct equiv_cpu_entry *equiv_cpu_table;
|
||||
|
||||
/* page-sized ucode patch buffer */
|
||||
void *patch;
|
||||
|
||||
static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
|
||||
{
|
||||
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
||||
|
|
@ -86,27 +93,76 @@ static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int get_matching_microcode(int cpu, struct microcode_header_amd *mc_hdr,
|
||||
int rev)
|
||||
static unsigned int verify_ucode_size(int cpu, u32 patch_size,
|
||||
unsigned int size)
|
||||
{
|
||||
unsigned int current_cpu_id;
|
||||
u16 equiv_cpu_id = 0;
|
||||
unsigned int i = 0;
|
||||
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
||||
u32 max_size;
|
||||
|
||||
#define F1XH_MPB_MAX_SIZE 2048
|
||||
#define F14H_MPB_MAX_SIZE 1824
|
||||
#define F15H_MPB_MAX_SIZE 4096
|
||||
|
||||
switch (c->x86) {
|
||||
case 0x14:
|
||||
max_size = F14H_MPB_MAX_SIZE;
|
||||
break;
|
||||
case 0x15:
|
||||
max_size = F15H_MPB_MAX_SIZE;
|
||||
break;
|
||||
default:
|
||||
max_size = F1XH_MPB_MAX_SIZE;
|
||||
break;
|
||||
}
|
||||
|
||||
if (patch_size > min_t(u32, size, max_size)) {
|
||||
pr_err("patch size mismatch\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
return patch_size;
|
||||
}
|
||||
|
||||
static u16 find_equiv_id(void)
|
||||
{
|
||||
unsigned int current_cpu_id, i = 0;
|
||||
|
||||
BUG_ON(equiv_cpu_table == NULL);
|
||||
|
||||
current_cpu_id = cpuid_eax(0x00000001);
|
||||
|
||||
while (equiv_cpu_table[i].installed_cpu != 0) {
|
||||
if (current_cpu_id == equiv_cpu_table[i].installed_cpu) {
|
||||
equiv_cpu_id = equiv_cpu_table[i].equiv_cpu;
|
||||
break;
|
||||
}
|
||||
if (current_cpu_id == equiv_cpu_table[i].installed_cpu)
|
||||
return equiv_cpu_table[i].equiv_cpu;
|
||||
|
||||
i++;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* we signal a good patch is found by returning its size > 0
|
||||
*/
|
||||
static int get_matching_microcode(int cpu, const u8 *ucode_ptr,
|
||||
unsigned int leftover_size, int rev,
|
||||
unsigned int *current_size)
|
||||
{
|
||||
struct microcode_header_amd *mc_hdr;
|
||||
unsigned int actual_size;
|
||||
u16 equiv_cpu_id;
|
||||
|
||||
/* size of the current patch we're staring at */
|
||||
*current_size = *(u32 *)(ucode_ptr + 4) + SECTION_HDR_SIZE;
|
||||
|
||||
equiv_cpu_id = find_equiv_id();
|
||||
if (!equiv_cpu_id)
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* let's look at the patch header itself now
|
||||
*/
|
||||
mc_hdr = (struct microcode_header_amd *)(ucode_ptr + SECTION_HDR_SIZE);
|
||||
|
||||
if (mc_hdr->processor_rev_id != equiv_cpu_id)
|
||||
return 0;
|
||||
|
||||
|
|
@ -120,7 +176,20 @@ static int get_matching_microcode(int cpu, struct microcode_header_amd *mc_hdr,
|
|||
if (mc_hdr->patch_id <= rev)
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
/*
|
||||
* now that the header looks sane, verify its size
|
||||
*/
|
||||
actual_size = verify_ucode_size(cpu, *current_size, leftover_size);
|
||||
if (!actual_size)
|
||||
return 0;
|
||||
|
||||
/* clear the patch buffer */
|
||||
memset(patch, 0, PAGE_SIZE);
|
||||
|
||||
/* all looks ok, get the binary patch */
|
||||
get_ucode_data(patch, ucode_ptr + SECTION_HDR_SIZE, actual_size);
|
||||
|
||||
return actual_size;
|
||||
}
|
||||
|
||||
static int apply_microcode_amd(int cpu)
|
||||
|
|
@ -155,63 +224,6 @@ static int apply_microcode_amd(int cpu)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static unsigned int verify_ucode_size(int cpu, const u8 *buf, unsigned int size)
|
||||
{
|
||||
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
||||
u32 max_size, actual_size;
|
||||
|
||||
#define F1XH_MPB_MAX_SIZE 2048
|
||||
#define F14H_MPB_MAX_SIZE 1824
|
||||
#define F15H_MPB_MAX_SIZE 4096
|
||||
|
||||
switch (c->x86) {
|
||||
case 0x14:
|
||||
max_size = F14H_MPB_MAX_SIZE;
|
||||
break;
|
||||
case 0x15:
|
||||
max_size = F15H_MPB_MAX_SIZE;
|
||||
break;
|
||||
default:
|
||||
max_size = F1XH_MPB_MAX_SIZE;
|
||||
break;
|
||||
}
|
||||
|
||||
actual_size = *(u32 *)(buf + 4);
|
||||
|
||||
if (actual_size + SECTION_HDR_SIZE > size || actual_size > max_size) {
|
||||
pr_err("section size mismatch\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
return actual_size;
|
||||
}
|
||||
|
||||
static struct microcode_header_amd *
|
||||
get_next_ucode(int cpu, const u8 *buf, unsigned int size, unsigned int *mc_size)
|
||||
{
|
||||
struct microcode_header_amd *mc = NULL;
|
||||
unsigned int actual_size = 0;
|
||||
|
||||
if (*(u32 *)buf != UCODE_UCODE_TYPE) {
|
||||
pr_err("invalid type field in container file section header\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
actual_size = verify_ucode_size(cpu, buf, size);
|
||||
if (!actual_size)
|
||||
goto out;
|
||||
|
||||
mc = vzalloc(actual_size);
|
||||
if (!mc)
|
||||
goto out;
|
||||
|
||||
get_ucode_data(mc, buf + SECTION_HDR_SIZE, actual_size);
|
||||
*mc_size = actual_size + SECTION_HDR_SIZE;
|
||||
|
||||
out:
|
||||
return mc;
|
||||
}
|
||||
|
||||
static int install_equiv_cpu_table(const u8 *buf)
|
||||
{
|
||||
unsigned int *ibuf = (unsigned int *)buf;
|
||||
|
|
@ -247,36 +259,38 @@ generic_load_microcode(int cpu, const u8 *data, size_t size)
|
|||
{
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
|
||||
struct microcode_header_amd *mc_hdr = NULL;
|
||||
unsigned int mc_size, leftover;
|
||||
unsigned int mc_size, leftover, current_size = 0;
|
||||
int offset;
|
||||
const u8 *ucode_ptr = data;
|
||||
void *new_mc = NULL;
|
||||
unsigned int new_rev = uci->cpu_sig.rev;
|
||||
enum ucode_state state = UCODE_OK;
|
||||
enum ucode_state state = UCODE_ERROR;
|
||||
|
||||
offset = install_equiv_cpu_table(ucode_ptr);
|
||||
if (offset < 0) {
|
||||
pr_err("failed to create equivalent cpu table\n");
|
||||
return UCODE_ERROR;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ucode_ptr += offset;
|
||||
leftover = size - offset;
|
||||
|
||||
if (*(u32 *)ucode_ptr != UCODE_UCODE_TYPE) {
|
||||
pr_err("invalid type field in container file section header\n");
|
||||
goto free_table;
|
||||
}
|
||||
|
||||
while (leftover) {
|
||||
mc_hdr = get_next_ucode(cpu, ucode_ptr, leftover, &mc_size);
|
||||
if (!mc_hdr)
|
||||
break;
|
||||
|
||||
if (get_matching_microcode(cpu, mc_hdr, new_rev)) {
|
||||
vfree(new_mc);
|
||||
mc_size = get_matching_microcode(cpu, ucode_ptr, leftover,
|
||||
new_rev, ¤t_size);
|
||||
if (mc_size) {
|
||||
mc_hdr = patch;
|
||||
new_mc = patch;
|
||||
new_rev = mc_hdr->patch_id;
|
||||
new_mc = mc_hdr;
|
||||
} else
|
||||
vfree(mc_hdr);
|
||||
goto out_ok;
|
||||
}
|
||||
|
||||
ucode_ptr += mc_size;
|
||||
leftover -= mc_size;
|
||||
ucode_ptr += current_size;
|
||||
leftover -= current_size;
|
||||
}
|
||||
|
||||
if (!new_mc) {
|
||||
|
|
@ -284,19 +298,16 @@ generic_load_microcode(int cpu, const u8 *data, size_t size)
|
|||
goto free_table;
|
||||
}
|
||||
|
||||
if (!leftover) {
|
||||
vfree(uci->mc);
|
||||
uci->mc = new_mc;
|
||||
pr_debug("CPU%d update ucode (0x%08x -> 0x%08x)\n",
|
||||
cpu, uci->cpu_sig.rev, new_rev);
|
||||
} else {
|
||||
vfree(new_mc);
|
||||
state = UCODE_ERROR;
|
||||
}
|
||||
out_ok:
|
||||
uci->mc = new_mc;
|
||||
state = UCODE_OK;
|
||||
pr_debug("CPU%d update ucode (0x%08x -> 0x%08x)\n",
|
||||
cpu, uci->cpu_sig.rev, new_rev);
|
||||
|
||||
free_table:
|
||||
free_equiv_cpu_table();
|
||||
|
||||
out:
|
||||
return state;
|
||||
}
|
||||
|
||||
|
|
@ -337,7 +348,6 @@ static void microcode_fini_cpu_amd(int cpu)
|
|||
{
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
|
||||
|
||||
vfree(uci->mc);
|
||||
uci->mc = NULL;
|
||||
}
|
||||
|
||||
|
|
@ -351,5 +361,14 @@ static struct microcode_ops microcode_amd_ops = {
|
|||
|
||||
struct microcode_ops * __init init_amd_microcode(void)
|
||||
{
|
||||
patch = (void *)get_zeroed_page(GFP_KERNEL);
|
||||
if (!patch)
|
||||
return NULL;
|
||||
|
||||
return µcode_amd_ops;
|
||||
}
|
||||
|
||||
void __exit exit_amd_microcode(void)
|
||||
{
|
||||
free_page((unsigned long)patch);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -563,6 +563,8 @@ module_init(microcode_init);
|
|||
|
||||
static void __exit microcode_exit(void)
|
||||
{
|
||||
struct cpuinfo_x86 *c = &cpu_data(0);
|
||||
|
||||
microcode_dev_exit();
|
||||
|
||||
unregister_hotcpu_notifier(&mc_cpu_notifier);
|
||||
|
|
@ -580,6 +582,9 @@ static void __exit microcode_exit(void)
|
|||
|
||||
microcode_ops = NULL;
|
||||
|
||||
if (c->x86_vendor == X86_VENDOR_AMD)
|
||||
exit_amd_microcode();
|
||||
|
||||
pr_info("Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
|
||||
}
|
||||
module_exit(microcode_exit);
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user