提交 0ad5c6b3 编写于 作者: L Linus Torvalds

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

Pull x86 microcode changes from Ingo Molnar:
 "Microcode driver updates: mostly cleanups but also some fixes
  (Borislav Petkov)"

* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/microcode/amd: Drop the pci_ids.h dependency
  x86/microcode/intel: Fix printing of microcode blobs in show_saved_mc()
  x86/microcode/intel: Check scan_microcode()'s retval
  x86/microcode/intel: Sanitize microcode_pointer()
  x86/microcode/intel: Move mc arg last in get_matching_{microcode|sig}
  x86/microcode/intel: Simplify generic_load_microcode_early()
  x86/microcode: Consolidate family,model, ... code
  x86/microcode/intel: Rename update_match_revision()
  x86/microcode/intel: Sanitize _save_mc()
  x86/microcode/intel: Make _save_mc() return the updated saved count
  x86/microcode/intel: Simplify load_ucode_intel_bsp()
  x86/microcode/intel: Get rid of last arg to load_ucode_intel_bsp()
  x86/microcode/intel: Do the mc_saved_src NULL check first
  x86/microcode/intel: Check if microcode was found before applying
  x86/microcode/intel: Fix out of bounds memory access to the extended header
......@@ -75,6 +75,79 @@ static inline void __exit exit_amd_microcode(void) {}
#ifdef CONFIG_MICROCODE_EARLY
#define MAX_UCODE_COUNT 128
#define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
#define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
#define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
#define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
#define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
#define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
#define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
#define CPUID_IS(a, b, c, ebx, ecx, edx) \
(!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
/*
* In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
* x86_vendor() gets vendor id for BSP.
*
* In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
* coding, we still use x86_vendor() to get vendor id for AP.
*
* x86_vendor() gets vendor information directly from CPUID.
*/
static inline int x86_vendor(void)
{
u32 eax = 0x00000000;
u32 ebx, ecx = 0, edx;
native_cpuid(&eax, &ebx, &ecx, &edx);
if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
return X86_VENDOR_INTEL;
if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
return X86_VENDOR_AMD;
return X86_VENDOR_UNKNOWN;
}
static inline unsigned int __x86_family(unsigned int sig)
{
unsigned int x86;
x86 = (sig >> 8) & 0xf;
if (x86 == 0xf)
x86 += (sig >> 20) & 0xff;
return x86;
}
static inline unsigned int x86_family(void)
{
u32 eax = 0x00000001;
u32 ebx, ecx = 0, edx;
native_cpuid(&eax, &ebx, &ecx, &edx);
return __x86_family(eax);
}
static inline unsigned int x86_model(unsigned int sig)
{
unsigned int x86, model;
x86 = __x86_family(sig);
model = (sig >> 4) & 0xf;
if (x86 == 0x6 || x86 == 0xf)
model += ((sig >> 16) & 0xf) << 4;
return model;
}
extern void __init load_ucode_bsp(void);
extern void load_ucode_ap(void);
extern int __init save_microcode_in_initrd(void);
......
......@@ -56,12 +56,15 @@ struct extended_sigtable {
#define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
extern int
get_matching_microcode(unsigned int csig, int cpf, void *mc, int rev);
extern int get_matching_microcode(unsigned int csig, int cpf, int rev, void *mc);
extern int microcode_sanity_check(void *mc, int print_err);
extern int get_matching_sig(unsigned int csig, int cpf, void *mc, int rev);
extern int
update_match_revision(struct microcode_header_intel *mc_header, int rev);
extern int get_matching_sig(unsigned int csig, int cpf, int rev, void *mc);
static inline int
revision_is_newer(struct microcode_header_intel *mc_header, int rev)
{
return (mc_header->rev <= rev) ? 0 : 1;
}
#ifdef CONFIG_MICROCODE_INTEL_EARLY
extern void __init load_ucode_intel_bsp(void);
......
......@@ -21,7 +21,6 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/firmware.h>
#include <linux/pci_ids.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/kernel.h>
......
......@@ -23,57 +23,6 @@
#include <asm/processor.h>
#include <asm/cmdline.h>
#define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
#define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
#define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
#define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
#define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
#define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
#define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
#define CPUID_IS(a, b, c, ebx, ecx, edx) \
(!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
/*
* In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
* x86_vendor() gets vendor id for BSP.
*
* In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
* coding, we still use x86_vendor() to get vendor id for AP.
*
* x86_vendor() gets vendor information directly through cpuid.
*/
static int x86_vendor(void)
{
u32 eax = 0x00000000;
u32 ebx, ecx = 0, edx;
native_cpuid(&eax, &ebx, &ecx, &edx);
if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
return X86_VENDOR_INTEL;
if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
return X86_VENDOR_AMD;
return X86_VENDOR_UNKNOWN;
}
static int x86_family(void)
{
u32 eax = 0x00000001;
u32 ebx, ecx = 0, edx;
int x86;
native_cpuid(&eax, &ebx, &ecx, &edx);
x86 = (eax >> 8) & 0xf;
if (x86 == 15)
x86 += (eax >> 20) & 0xff;
return x86;
}
static bool __init check_loader_disabled_bsp(void)
{
#ifdef CONFIG_X86_32
......@@ -96,7 +45,7 @@ static bool __init check_loader_disabled_bsp(void)
void __init load_ucode_bsp(void)
{
int vendor, x86;
int vendor, family;
if (check_loader_disabled_bsp())
return;
......@@ -105,15 +54,15 @@ void __init load_ucode_bsp(void)
return;
vendor = x86_vendor();
x86 = x86_family();
family = x86_family();
switch (vendor) {
case X86_VENDOR_INTEL:
if (x86 >= 6)
if (family >= 6)
load_ucode_intel_bsp();
break;
case X86_VENDOR_AMD:
if (x86 >= 0x10)
if (family >= 0x10)
load_ucode_amd_bsp();
break;
default:
......@@ -132,7 +81,7 @@ static bool check_loader_disabled_ap(void)
void load_ucode_ap(void)
{
int vendor, x86;
int vendor, family;
if (check_loader_disabled_ap())
return;
......@@ -141,15 +90,15 @@ void load_ucode_ap(void)
return;
vendor = x86_vendor();
x86 = x86_family();
family = x86_family();
switch (vendor) {
case X86_VENDOR_INTEL:
if (x86 >= 6)
if (family >= 6)
load_ucode_intel_ap();
break;
case X86_VENDOR_AMD:
if (x86 >= 0x10)
if (family >= 0x10)
load_ucode_amd_ap();
break;
default:
......@@ -179,18 +128,18 @@ int __init save_microcode_in_initrd(void)
void reload_early_microcode(void)
{
int vendor, x86;
int vendor, family;
vendor = x86_vendor();
x86 = x86_family();
family = x86_family();
switch (vendor) {
case X86_VENDOR_INTEL:
if (x86 >= 6)
if (family >= 6)
reload_ucode_intel();
break;
case X86_VENDOR_AMD:
if (x86 >= 0x10)
if (family >= 0x10)
reload_ucode_amd();
break;
default:
......
......@@ -124,7 +124,7 @@ static int get_matching_mc(struct microcode_intel *mc_intel, int cpu)
cpf = cpu_sig.pf;
crev = cpu_sig.rev;
return get_matching_microcode(csig, cpf, mc_intel, crev);
return get_matching_microcode(csig, cpf, crev, mc_intel);
}
static int apply_microcode_intel(int cpu)
......@@ -226,7 +226,7 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
csig = uci->cpu_sig.sig;
cpf = uci->cpu_sig.pf;
if (get_matching_microcode(csig, cpf, mc, new_rev)) {
if (get_matching_microcode(csig, cpf, new_rev, mc)) {
vfree(new_mc);
new_rev = mc_header.rev;
new_mc = mc;
......
......@@ -16,6 +16,14 @@
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
/*
* This needs to be before all headers so that pr_debug in printk.h doesn't turn
* printk calls into no_printk().
*
*#define DEBUG
*/
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/slab.h>
......@@ -28,6 +36,9 @@
#include <asm/tlbflush.h>
#include <asm/setup.h>
#undef pr_fmt
#define pr_fmt(fmt) "microcode: " fmt
static unsigned long mc_saved_in_initrd[MAX_UCODE_COUNT];
static struct mc_saved_data {
unsigned int mc_saved_count;
......@@ -35,50 +46,45 @@ static struct mc_saved_data {
} mc_saved_data;
static enum ucode_state
generic_load_microcode_early(struct microcode_intel **mc_saved_p,
unsigned int mc_saved_count,
struct ucode_cpu_info *uci)
load_microcode_early(struct microcode_intel **saved,
unsigned int num_saved, struct ucode_cpu_info *uci)
{
struct microcode_intel *ucode_ptr, *new_mc = NULL;
int new_rev = uci->cpu_sig.rev;
enum ucode_state state = UCODE_OK;
unsigned int mc_size;
struct microcode_header_intel *mc_header;
unsigned int csig = uci->cpu_sig.sig;
unsigned int cpf = uci->cpu_sig.pf;
int i;
struct microcode_header_intel *mc_hdr;
int new_rev, ret, i;
for (i = 0; i < mc_saved_count; i++) {
ucode_ptr = mc_saved_p[i];
new_rev = uci->cpu_sig.rev;
mc_header = (struct microcode_header_intel *)ucode_ptr;
mc_size = get_totalsize(mc_header);
if (get_matching_microcode(csig, cpf, ucode_ptr, new_rev)) {
new_rev = mc_header->rev;
new_mc = ucode_ptr;
}
}
for (i = 0; i < num_saved; i++) {
ucode_ptr = saved[i];
mc_hdr = (struct microcode_header_intel *)ucode_ptr;
if (!new_mc) {
state = UCODE_NFOUND;
goto out;
ret = get_matching_microcode(uci->cpu_sig.sig,
uci->cpu_sig.pf,
new_rev,
ucode_ptr);
if (!ret)
continue;
new_rev = mc_hdr->rev;
new_mc = ucode_ptr;
}
if (!new_mc)
return UCODE_NFOUND;
uci->mc = (struct microcode_intel *)new_mc;
out:
return state;
return UCODE_OK;
}
static void
microcode_pointer(struct microcode_intel **mc_saved,
unsigned long *mc_saved_in_initrd,
unsigned long initrd_start, int mc_saved_count)
static inline void
copy_initrd_ptrs(struct microcode_intel **mc_saved, unsigned long *initrd,
unsigned long off, int num_saved)
{
int i;
for (i = 0; i < mc_saved_count; i++)
mc_saved[i] = (struct microcode_intel *)
(mc_saved_in_initrd[i] + initrd_start);
for (i = 0; i < num_saved; i++)
mc_saved[i] = (struct microcode_intel *)(initrd[i] + off);
}
#ifdef CONFIG_X86_32
......@@ -102,55 +108,27 @@ microcode_phys(struct microcode_intel **mc_saved_tmp,
#endif
static enum ucode_state
load_microcode(struct mc_saved_data *mc_saved_data,
unsigned long *mc_saved_in_initrd,
unsigned long initrd_start,
struct ucode_cpu_info *uci)
load_microcode(struct mc_saved_data *mc_saved_data, unsigned long *initrd,
unsigned long initrd_start, struct ucode_cpu_info *uci)
{
struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
unsigned int count = mc_saved_data->mc_saved_count;
if (!mc_saved_data->mc_saved) {
microcode_pointer(mc_saved_tmp, mc_saved_in_initrd,
initrd_start, count);
copy_initrd_ptrs(mc_saved_tmp, initrd, initrd_start, count);
return generic_load_microcode_early(mc_saved_tmp, count, uci);
return load_microcode_early(mc_saved_tmp, count, uci);
} else {
#ifdef CONFIG_X86_32
microcode_phys(mc_saved_tmp, mc_saved_data);
return generic_load_microcode_early(mc_saved_tmp, count, uci);
return load_microcode_early(mc_saved_tmp, count, uci);
#else
return generic_load_microcode_early(mc_saved_data->mc_saved,
return load_microcode_early(mc_saved_data->mc_saved,
count, uci);
#endif
}
}
static u8 get_x86_family(unsigned long sig)
{
u8 x86;
x86 = (sig >> 8) & 0xf;
if (x86 == 0xf)
x86 += (sig >> 20) & 0xff;
return x86;
}
static u8 get_x86_model(unsigned long sig)
{
u8 x86, x86_model;
x86 = get_x86_family(sig);
x86_model = (sig >> 4) & 0xf;
if (x86 == 0x6 || x86 == 0xf)
x86_model += ((sig >> 16) & 0xf) << 4;
return x86_model;
}
/*
* Given CPU signature and a microcode patch, this function finds if the
* microcode patch has matching family and model with the CPU.
......@@ -159,42 +137,40 @@ static enum ucode_state
matching_model_microcode(struct microcode_header_intel *mc_header,
unsigned long sig)
{
u8 x86, x86_model;
u8 x86_ucode, x86_model_ucode;
unsigned int fam, model;
unsigned int fam_ucode, model_ucode;
struct extended_sigtable *ext_header;
unsigned long total_size = get_totalsize(mc_header);
unsigned long data_size = get_datasize(mc_header);
int ext_sigcount, i;
struct extended_signature *ext_sig;
x86 = get_x86_family(sig);
x86_model = get_x86_model(sig);
fam = __x86_family(sig);
model = x86_model(sig);
x86_ucode = get_x86_family(mc_header->sig);
x86_model_ucode = get_x86_model(mc_header->sig);
fam_ucode = __x86_family(mc_header->sig);
model_ucode = x86_model(mc_header->sig);
if (x86 == x86_ucode && x86_model == x86_model_ucode)
if (fam == fam_ucode && model == model_ucode)
return UCODE_OK;
/* Look for ext. headers: */
if (total_size <= data_size + MC_HEADER_SIZE)
return UCODE_NFOUND;
ext_header = (struct extended_sigtable *)
mc_header + data_size + MC_HEADER_SIZE;
ext_header = (void *) mc_header + data_size + MC_HEADER_SIZE;
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
ext_sigcount = ext_header->count;
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
for (i = 0; i < ext_sigcount; i++) {
x86_ucode = get_x86_family(ext_sig->sig);
x86_model_ucode = get_x86_model(ext_sig->sig);
fam_ucode = __x86_family(ext_sig->sig);
model_ucode = x86_model(ext_sig->sig);
if (x86 == x86_ucode && x86_model == x86_model_ucode)
if (fam == fam_ucode && model == model_ucode)
return UCODE_OK;
ext_sig++;
}
return UCODE_NFOUND;
}
......@@ -204,7 +180,7 @@ save_microcode(struct mc_saved_data *mc_saved_data,
unsigned int mc_saved_count)
{
int i, j;
struct microcode_intel **mc_saved_p;
struct microcode_intel **saved_ptr;
int ret;
if (!mc_saved_count)
......@@ -213,39 +189,45 @@ save_microcode(struct mc_saved_data *mc_saved_data,
/*
* Copy new microcode data.
*/
mc_saved_p = kmalloc(mc_saved_count*sizeof(struct microcode_intel *),
GFP_KERNEL);
if (!mc_saved_p)
saved_ptr = kcalloc(mc_saved_count, sizeof(struct microcode_intel *), GFP_KERNEL);
if (!saved_ptr)
return -ENOMEM;
for (i = 0; i < mc_saved_count; i++) {
struct microcode_intel *mc = mc_saved_src[i];
struct microcode_header_intel *mc_header = &mc->hdr;
unsigned long mc_size = get_totalsize(mc_header);
mc_saved_p[i] = kmalloc(mc_size, GFP_KERNEL);
if (!mc_saved_p[i]) {
ret = -ENOMEM;
goto err;
}
struct microcode_header_intel *mc_hdr;
struct microcode_intel *mc;
unsigned long size;
if (!mc_saved_src[i]) {
ret = -EINVAL;
goto err;
}
memcpy(mc_saved_p[i], mc, mc_size);
mc = mc_saved_src[i];
mc_hdr = &mc->hdr;
size = get_totalsize(mc_hdr);
saved_ptr[i] = kmalloc(size, GFP_KERNEL);
if (!saved_ptr[i]) {
ret = -ENOMEM;
goto err;
}
memcpy(saved_ptr[i], mc, size);
}
/*
* Point to newly saved microcode.
*/
mc_saved_data->mc_saved = mc_saved_p;
mc_saved_data->mc_saved = saved_ptr;
mc_saved_data->mc_saved_count = mc_saved_count;
return 0;
err:
for (j = 0; j <= i; j++)
kfree(mc_saved_p[j]);
kfree(mc_saved_p);
kfree(saved_ptr[j]);
kfree(saved_ptr);
return ret;
}
......@@ -257,48 +239,45 @@ save_microcode(struct mc_saved_data *mc_saved_data,
* - or if it is a newly discovered microcode patch.
*
* The microcode patch should have matching model with CPU.
*
* Returns: The updated number @num_saved of saved microcode patches.
*/
static void _save_mc(struct microcode_intel **mc_saved, u8 *ucode_ptr,
unsigned int *mc_saved_count_p)
static unsigned int _save_mc(struct microcode_intel **mc_saved,
u8 *ucode_ptr, unsigned int num_saved)
{
int i;
int found = 0;
unsigned int mc_saved_count = *mc_saved_count_p;
struct microcode_header_intel *mc_header;
struct microcode_header_intel *mc_hdr, *mc_saved_hdr;
unsigned int sig, pf, new_rev;
int found = 0, i;
mc_hdr = (struct microcode_header_intel *)ucode_ptr;
for (i = 0; i < num_saved; i++) {
mc_saved_hdr = (struct microcode_header_intel *)mc_saved[i];
sig = mc_saved_hdr->sig;
pf = mc_saved_hdr->pf;
new_rev = mc_hdr->rev;
if (!get_matching_sig(sig, pf, new_rev, ucode_ptr))
continue;
found = 1;
if (!revision_is_newer(mc_hdr, new_rev))
continue;
mc_header = (struct microcode_header_intel *)ucode_ptr;
for (i = 0; i < mc_saved_count; i++) {
unsigned int sig, pf;
unsigned int new_rev;
struct microcode_header_intel *mc_saved_header =
(struct microcode_header_intel *)mc_saved[i];
sig = mc_saved_header->sig;
pf = mc_saved_header->pf;
new_rev = mc_header->rev;
if (get_matching_sig(sig, pf, ucode_ptr, new_rev)) {
found = 1;
if (update_match_revision(mc_header, new_rev)) {
/*
* Found an older ucode saved before.
* Replace the older one with this newer
* one.
*/
mc_saved[i] =
(struct microcode_intel *)ucode_ptr;
break;
}
}
}
if (i >= mc_saved_count && !found)
/*
* This ucode is first time discovered in ucode file.
* Save it to memory.
* Found an older ucode saved earlier. Replace it with
* this newer one.
*/
mc_saved[mc_saved_count++] =
(struct microcode_intel *)ucode_ptr;
mc_saved[i] = (struct microcode_intel *)ucode_ptr;
break;
}
/* Newly detected microcode, save it to memory. */
if (i >= num_saved && !found)
mc_saved[num_saved++] = (struct microcode_intel *)ucode_ptr;
*mc_saved_count_p = mc_saved_count;
return num_saved;
}
/*
......@@ -346,7 +325,7 @@ get_matching_model_microcode(int cpu, unsigned long start,
continue;
}
_save_mc(mc_saved_tmp, ucode_ptr, &mc_saved_count);
mc_saved_count = _save_mc(mc_saved_tmp, ucode_ptr, mc_saved_count);
ucode_ptr += mc_size;
}
......@@ -372,7 +351,7 @@ get_matching_model_microcode(int cpu, unsigned long start,
static int collect_cpu_info_early(struct ucode_cpu_info *uci)
{
unsigned int val[2];
u8 x86, x86_model;
unsigned int family, model;
struct cpu_signature csig;
unsigned int eax, ebx, ecx, edx;
......@@ -387,10 +366,10 @@ static int collect_cpu_info_early(struct ucode_cpu_info *uci)
native_cpuid(&eax, &ebx, &ecx, &edx);
csig.sig = eax;
x86 = get_x86_family(csig.sig);
x86_model = get_x86_model(csig.sig);
family = __x86_family(csig.sig);
model = x86_model(csig.sig);
if ((x86_model >= 5) || (x86 > 6)) {
if ((model >= 5) || (family > 6)) {
/* get processor flags from MSR 0x17 */
native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
csig.pf = 1 << ((val[1] >> 18) & 7);
......@@ -429,8 +408,7 @@ static void __ref show_saved_mc(void)
sig = uci.cpu_sig.sig;
pf = uci.cpu_sig.pf;
rev = uci.cpu_sig.rev;
pr_debug("CPU%d: sig=0x%x, pf=0x%x, rev=0x%x\n",
smp_processor_id(), sig, pf, rev);
pr_debug("CPU: sig=0x%x, pf=0x%x, rev=0x%x\n", sig, pf, rev);
for (i = 0; i < mc_saved_data.mc_saved_count; i++) {
struct microcode_header_intel *mc_saved_header;
......@@ -457,8 +435,7 @@ static void __ref show_saved_mc(void)
if (total_size <= data_size + MC_HEADER_SIZE)
continue;
ext_header = (struct extended_sigtable *)
mc_saved_header + data_size + MC_HEADER_SIZE;
ext_header = (void *) mc_saved_header + data_size + MC_HEADER_SIZE;
ext_sigcount = ext_header->count;
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
......@@ -515,8 +492,7 @@ int save_mc_for_early(u8 *mc)
* Save the microcode patch mc in mc_save_tmp structure if it's a newer
* version.
*/
_save_mc(mc_saved_tmp, mc, &mc_saved_count);
mc_saved_count = _save_mc(mc_saved_tmp, mc, mc_saved_count);
/*
* Save the mc_save_tmp in global mc_saved_data.
......@@ -548,12 +524,10 @@ EXPORT_SYMBOL_GPL(save_mc_for_early);
static __initdata char ucode_name[] = "kernel/x86/microcode/GenuineIntel.bin";
static __init enum ucode_state
scan_microcode(unsigned long start, unsigned long end,
struct mc_saved_data *mc_saved_data,
unsigned long *mc_saved_in_initrd,
struct ucode_cpu_info *uci)
scan_microcode(struct mc_saved_data *mc_saved_data, unsigned long *initrd,
unsigned long start, unsigned long size,
struct ucode_cpu_info *uci)
{
unsigned int size = end - start + 1;
struct cpio_data cd;
long offset = 0;
#ifdef CONFIG_X86_32
......@@ -569,10 +543,8 @@ scan_microcode(unsigned long start, unsigned long end,
if (!cd.data)
return UCODE_ERROR;
return get_matching_model_microcode(0, start, cd.data, cd.size,
mc_saved_data, mc_saved_in_initrd,
uci);
mc_saved_data, initrd, uci);
}
/*
......@@ -704,7 +676,7 @@ int __init save_microcode_in_initrd_intel(void)
if (count == 0)
return ret;
microcode_pointer(mc_saved, mc_saved_in_initrd, initrd_start, count);
copy_initrd_ptrs(mc_saved, mc_saved_in_initrd, initrd_start, count);
ret = save_microcode(&mc_saved_data, mc_saved, count);
if (ret)
pr_err("Cannot save microcode patches from initrd.\n");
......@@ -716,52 +688,44 @@ int __init save_microcode_in_initrd_intel(void)
static void __init
_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)
unsigned long *initrd,
unsigned long start, unsigned long size)
{
struct ucode_cpu_info uci;
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);
collect_cpu_info_early(&uci);
ret = load_microcode(mc_saved_data, mc_saved_in_initrd,
initrd_start_early, uci);
ret = scan_microcode(mc_saved_data, initrd, start, size, &uci);
if (ret != UCODE_OK)
return;
if (ret == UCODE_OK)
apply_microcode_early(uci, true);
ret = load_microcode(mc_saved_data, initrd, start, &uci);
if (ret != UCODE_OK)
return;
apply_microcode_early(&uci, true);
}
void __init
load_ucode_intel_bsp(void)
void __init load_ucode_intel_bsp(void)
{
u64 ramdisk_image, ramdisk_size;
unsigned long initrd_start_early, initrd_end_early;
struct ucode_cpu_info uci;
u64 start, size;
#ifdef CONFIG_X86_32
struct boot_params *boot_params_p;
struct boot_params *p;
boot_params_p = (struct boot_params *)__pa_nodebug(&boot_params);
ramdisk_image = boot_params_p->hdr.ramdisk_image;
ramdisk_size = boot_params_p->hdr.ramdisk_size;
initrd_start_early = ramdisk_image;
initrd_end_early = initrd_start_early + ramdisk_size;
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),
initrd_start_early, initrd_end_early, &uci);
(struct mc_saved_data *)__pa_nodebug(&mc_saved_data),
(unsigned long *)__pa_nodebug(&mc_saved_in_initrd),
start, size);
#else
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);
start = boot_params.hdr.ramdisk_image + PAGE_OFFSET;
size = boot_params.hdr.ramdisk_size;
_load_ucode_intel_bsp(&mc_saved_data, mc_saved_in_initrd, start, size);
#endif
}
......@@ -771,6 +735,7 @@ void load_ucode_intel_ap(void)
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;
......@@ -793,8 +758,12 @@ void load_ucode_intel_ap(void)
return;
collect_cpu_info_early(&uci);
load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
initrd_start_addr, &uci);
ret = load_microcode(mc_saved_data_p, mc_saved_in_initrd_p,
initrd_start_addr, &uci);
if (ret != UCODE_OK)
return;
apply_microcode_early(&uci, true);
}
......@@ -808,8 +777,8 @@ void reload_ucode_intel(void)
collect_cpu_info_early(&uci);
ret = generic_load_microcode_early(mc_saved_data.mc_saved,
mc_saved_data.mc_saved_count, &uci);
ret = load_microcode_early(mc_saved_data.mc_saved,
mc_saved_data.mc_saved_count, &uci);
if (ret != UCODE_OK)
return;
......
......@@ -38,12 +38,6 @@ update_match_cpu(unsigned int csig, unsigned int cpf,
return (!sigmatch(sig, csig, pf, cpf)) ? 0 : 1;
}
int
update_match_revision(struct microcode_header_intel *mc_header, int rev)
{
return (mc_header->rev <= rev) ? 0 : 1;
}
int microcode_sanity_check(void *mc, int print_err)
{
unsigned long total_size, data_size, ext_table_size;
......@@ -128,10 +122,9 @@ int microcode_sanity_check(void *mc, int print_err)
EXPORT_SYMBOL_GPL(microcode_sanity_check);
/*
* return 0 - no update found
* return 1 - found update
* Returns 1 if update has been found, 0 otherwise.
*/
int get_matching_sig(unsigned int csig, int cpf, void *mc, int rev)
int get_matching_sig(unsigned int csig, int cpf, int rev, void *mc)
{
struct microcode_header_intel *mc_header = mc;
struct extended_sigtable *ext_header;
......@@ -159,16 +152,15 @@ int get_matching_sig(unsigned int csig, int cpf, void *mc, int rev)
}
/*
* return 0 - no update found
* return 1 - found update
* Returns 1 if update has been found, 0 otherwise.
*/
int get_matching_microcode(unsigned int csig, int cpf, void *mc, int rev)
int get_matching_microcode(unsigned int csig, int cpf, int rev, void *mc)
{
struct microcode_header_intel *mc_header = mc;
struct microcode_header_intel *mc_hdr = mc;
if (!update_match_revision(mc_header, rev))
if (!revision_is_newer(mc_hdr, rev))
return 0;
return get_matching_sig(csig, cpf, mc, rev);
return get_matching_sig(csig, cpf, rev, mc);
}
EXPORT_SYMBOL_GPL(get_matching_microcode);
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