* in a single CPU package.
* 1.10 28 Feb 2002 Asit K Mallick <asit.k.mallick@intel.com> and
* Tigran Aivazian <tigran@veritas.com>,
- * Serialize updates as required on HT processors due to speculative
- * nature of implementation.
+ * Serialize updates as required on HT processors due to
+ * speculative nature of implementation.
* 1.11 22 Mar 2002 Tigran Aivazian <tigran@veritas.com>
* Fix the panic when writing zero-length microcode chunk.
* 1.12 29 Sep 2003 Nitin Kamble <nitin.a.kamble@intel.com>,
* Fix sigmatch() macro to handle old CPUs with pf == 0.
* Thanks to Stuart Swales for pointing out this bug.
*/
-
-//#define DEBUG /* pr_debug */
#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/init.h>
MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
MODULE_LICENSE("GPL");
-#define DEFAULT_UCODE_DATASIZE (2000) /* 2000 bytes */
-#define MC_HEADER_SIZE (sizeof(struct microcode_header)) /* 48 bytes */
-#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 2048 bytes */
-#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable)) /* 20 bytes */
-#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature)) /* 12 bytes */
+struct microcode_header_intel {
+ unsigned int hdrver;
+ unsigned int rev;
+ unsigned int date;
+ unsigned int sig;
+ unsigned int cksum;
+ unsigned int ldrver;
+ unsigned int pf;
+ unsigned int datasize;
+ unsigned int totalsize;
+ unsigned int reserved[3];
+};
+
+struct microcode_intel {
+ struct microcode_header_intel hdr;
+ unsigned int bits[0];
+};
+
+/* microcode format is extended from prescott processors */
+struct extended_signature {
+ unsigned int sig;
+ unsigned int pf;
+ unsigned int cksum;
+};
+
+struct extended_sigtable {
+ unsigned int count;
+ unsigned int cksum;
+ unsigned int reserved[3];
+ struct extended_signature sigs[0];
+};
+
+#define DEFAULT_UCODE_DATASIZE (2000)
+#define MC_HEADER_SIZE (sizeof(struct microcode_header_intel))
+#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
+#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable))
+#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature))
#define DWSIZE (sizeof(u32))
#define get_totalsize(mc) \
- (((struct microcode *)mc)->hdr.totalsize ? \
- ((struct microcode *)mc)->hdr.totalsize : DEFAULT_UCODE_TOTALSIZE)
+ (((struct microcode_intel *)mc)->hdr.totalsize ? \
+ ((struct microcode_intel *)mc)->hdr.totalsize : \
+ DEFAULT_UCODE_TOTALSIZE)
+
#define get_datasize(mc) \
- (((struct microcode *)mc)->hdr.datasize ? \
- ((struct microcode *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE)
+ (((struct microcode_intel *)mc)->hdr.datasize ? \
+ ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE)
#define sigmatch(s1, s2, p1, p2) \
(((s1) == (s2)) && (((p1) & (p2)) || (((p1) == 0) && ((p2) == 0))))
/* serialize access to the physical write to MSR 0x79 */
static DEFINE_SPINLOCK(microcode_update_lock);
-/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
-extern struct mutex microcode_mutex;
-
-extern struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
-
-void collect_cpu_info(int cpu_num)
+static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
{
struct cpuinfo_x86 *c = &cpu_data(cpu_num);
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
+ unsigned long flags;
unsigned int val[2];
- /* We should bind the task to the CPU */
- BUG_ON(raw_smp_processor_id() != cpu_num);
- uci->pf = uci->rev = 0;
- uci->mc = NULL;
- uci->valid = 1;
+ memset(csig, 0, sizeof(*csig));
if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
cpu_has(c, X86_FEATURE_IA64)) {
printk(KERN_ERR "microcode: CPU%d not a capable Intel "
"processor\n", cpu_num);
- uci->valid = 0;
- return;
+ return -1;
}
- uci->sig = cpuid_eax(0x00000001);
+ csig->sig = cpuid_eax(0x00000001);
if ((c->x86_model >= 5) || (c->x86 > 6)) {
/* get processor flags from MSR 0x17 */
rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
- uci->pf = 1 << ((val[1] >> 18) & 7);
+ csig->pf = 1 << ((val[1] >> 18) & 7);
}
+ /* serialize access to the physical write to MSR 0x79 */
+ spin_lock_irqsave(µcode_update_lock, flags);
+
wrmsr(MSR_IA32_UCODE_REV, 0, 0);
/* see notes above for revision 1.07. Apparent chip bug */
sync_core();
/* get the current revision from MSR 0x8B */
- rdmsr(MSR_IA32_UCODE_REV, val[0], uci->rev);
+ rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev);
+ spin_unlock_irqrestore(µcode_update_lock, flags);
+
pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n",
- uci->sig, uci->pf, uci->rev);
+ csig->sig, csig->pf, csig->rev);
+
+ return 0;
}
-static inline int microcode_update_match(int cpu_num,
- struct microcode_header *mc_header, int sig, int pf)
+static inline int update_match_cpu(struct cpu_signature *csig, int sig, int pf)
{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
+ return (!sigmatch(sig, csig->sig, pf, csig->pf)) ? 0 : 1;
+}
- if (!sigmatch(sig, uci->sig, pf, uci->pf)
- || mc_header->rev <= uci->rev)
- return 0;
- return 1;
+static inline 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)
+static int microcode_sanity_check(void *mc)
{
- struct microcode_header *mc_header = mc;
+ struct microcode_header_intel *mc_header = mc;
struct extended_sigtable *ext_header = NULL;
struct extended_signature *ext_sig;
unsigned long total_size, data_size, ext_table_size;
/*
* return 0 - no update found
* return 1 - found update
- * return < 0 - error
*/
-int get_matching_microcode(void *mc, int cpu)
+static int
+get_matching_microcode(struct cpu_signature *cpu_sig, void *mc, int rev)
{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- struct microcode_header *mc_header = mc;
+ struct microcode_header_intel *mc_header = mc;
struct extended_sigtable *ext_header;
unsigned long total_size = get_totalsize(mc_header);
int ext_sigcount, i;
struct extended_signature *ext_sig;
- void *new_mc;
- if (microcode_update_match(cpu, mc_header,
- mc_header->sig, mc_header->pf))
- goto find;
+ if (!update_match_revision(mc_header, rev))
+ return 0;
+
+ if (update_match_cpu(cpu_sig, mc_header->sig, mc_header->pf))
+ return 1;
+ /* Look for ext. headers: */
if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE)
return 0;
ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE;
ext_sigcount = ext_header->count;
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
+
for (i = 0; i < ext_sigcount; i++) {
- if (microcode_update_match(cpu, mc_header,
- ext_sig->sig, ext_sig->pf))
- goto find;
+ if (update_match_cpu(cpu_sig, ext_sig->sig, ext_sig->pf))
+ return 1;
ext_sig++;
}
return 0;
-find:
- pr_debug("microcode: CPU%d found a matching microcode update with"
- " version 0x%x (current=0x%x)\n", cpu, mc_header->rev, uci->rev);
- new_mc = vmalloc(total_size);
- if (!new_mc) {
- printk(KERN_ERR "microcode: error! Can not allocate memory\n");
- return -ENOMEM;
- }
-
- /* free previous update file */
- vfree(uci->mc);
-
- memcpy(new_mc, mc, total_size);
- uci->mc = new_mc;
- return 1;
}
-void apply_microcode(int cpu)
+static void apply_microcode(int cpu)
{
unsigned long flags;
unsigned int val[2];
int cpu_num = raw_smp_processor_id();
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ struct microcode_intel *mc_intel = uci->mc;
/* We should bind the task to the CPU */
BUG_ON(cpu_num != cpu);
- if (uci->mc == NULL)
+ if (mc_intel == NULL)
return;
/* serialize access to the physical write to MSR 0x79 */
/* write microcode via MSR 0x79 */
wrmsr(MSR_IA32_UCODE_WRITE,
- (unsigned long) uci->mc->bits,
- (unsigned long) uci->mc->bits >> 16 >> 16);
+ (unsigned long) mc_intel->bits,
+ (unsigned long) mc_intel->bits >> 16 >> 16);
wrmsr(MSR_IA32_UCODE_REV, 0, 0);
/* see notes above for revision 1.07. Apparent chip bug */
rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
spin_unlock_irqrestore(µcode_update_lock, flags);
- if (val[1] != uci->mc->hdr.rev) {
+ if (val[1] != mc_intel->hdr.rev) {
printk(KERN_ERR "microcode: CPU%d update from revision "
- "0x%x to 0x%x failed\n", cpu_num, uci->rev, val[1]);
+ "0x%x to 0x%x failed\n", cpu_num, uci->cpu_sig.rev, val[1]);
return;
}
printk(KERN_INFO "microcode: CPU%d updated from revision "
- "0x%x to 0x%x, date = %08x \n",
- cpu_num, uci->rev, val[1], uci->mc->hdr.date);
- uci->rev = val[1];
+ "0x%x to 0x%x, date = %04x-%02x-%02x \n",
+ cpu_num, uci->cpu_sig.rev, val[1],
+ mc_intel->hdr.date & 0xffff,
+ mc_intel->hdr.date >> 24,
+ (mc_intel->hdr.date >> 16) & 0xff);
+ uci->cpu_sig.rev = val[1];
}
-#ifdef CONFIG_MICROCODE_OLD_INTERFACE
-extern void __user *user_buffer; /* user area microcode data buffer */
-extern unsigned int user_buffer_size; /* it's size */
-
-long get_next_ucode(void **mc, long offset)
+static int generic_load_microcode(int cpu, void *data, size_t size,
+ int (*get_ucode_data)(void *, const void *, size_t))
{
- struct microcode_header mc_header;
- unsigned long total_size;
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ u8 *ucode_ptr = data, *new_mc = NULL, *mc;
+ int new_rev = uci->cpu_sig.rev;
+ unsigned int leftover = size;
- /* No more data */
- if (offset >= user_buffer_size)
- return 0;
- if (copy_from_user(&mc_header, user_buffer + offset, MC_HEADER_SIZE)) {
- printk(KERN_ERR "microcode: error! Can not read user data\n");
- return -EFAULT;
- }
- total_size = get_totalsize(&mc_header);
- if (offset + total_size > user_buffer_size) {
- printk(KERN_ERR "microcode: error! Bad total size in microcode "
- "data file\n");
- return -EINVAL;
- }
- *mc = vmalloc(total_size);
- if (!*mc)
- return -ENOMEM;
- if (copy_from_user(*mc, user_buffer + offset, total_size)) {
- printk(KERN_ERR "microcode: error! Can not read user data\n");
- vfree(*mc);
- return -EFAULT;
- }
- return offset + total_size;
-}
-#endif
+ while (leftover) {
+ struct microcode_header_intel mc_header;
+ unsigned int mc_size;
-static long get_next_ucode_from_buffer(void **mc, const u8 *buf,
- unsigned long size, long offset)
-{
- struct microcode_header *mc_header;
- unsigned long total_size;
+ if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header)))
+ break;
- /* No more data */
- if (offset >= size)
- return 0;
- mc_header = (struct microcode_header *)(buf + offset);
- total_size = get_totalsize(mc_header);
+ mc_size = get_totalsize(&mc_header);
+ if (!mc_size || mc_size > leftover) {
+ printk(KERN_ERR "microcode: error!"
+ "Bad data in microcode data file\n");
+ break;
+ }
- if (offset + total_size > size) {
- printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
- return -EINVAL;
+ mc = vmalloc(mc_size);
+ if (!mc)
+ break;
+
+ if (get_ucode_data(mc, ucode_ptr, mc_size) ||
+ microcode_sanity_check(mc) < 0) {
+ vfree(mc);
+ break;
+ }
+
+ if (get_matching_microcode(&uci->cpu_sig, mc, new_rev)) {
+ if (new_mc)
+ vfree(new_mc);
+ new_rev = mc_header.rev;
+ new_mc = mc;
+ } else
+ vfree(mc);
+
+ ucode_ptr += mc_size;
+ leftover -= mc_size;
}
- *mc = vmalloc(total_size);
- if (!*mc) {
- printk(KERN_ERR "microcode: error! Can not allocate memory\n");
- return -ENOMEM;
+ if (new_mc) {
+ if (!leftover) {
+ if (uci->mc)
+ vfree(uci->mc);
+ uci->mc = (struct microcode_intel *)new_mc;
+ pr_debug("microcode: CPU%d found a matching microcode update with"
+ " version 0x%x (current=0x%x)\n",
+ cpu, new_rev, uci->cpu_sig.rev);
+ } else
+ vfree(new_mc);
}
- memcpy(*mc, buf + offset, total_size);
- return offset + total_size;
+
+ return (int)leftover;
}
-/* fake device for request_firmware */
-extern struct platform_device *microcode_pdev;
+static int get_ucode_fw(void *to, const void *from, size_t n)
+{
+ memcpy(to, from, n);
+ return 0;
+}
-int cpu_request_microcode(int cpu)
+static int request_microcode_fw(int cpu, struct device *device)
{
char name[30];
struct cpuinfo_x86 *c = &cpu_data(cpu);
const struct firmware *firmware;
- const u8 *buf;
- unsigned long size;
- long offset = 0;
- int error;
- void *mc;
+ int ret;
/* We should bind the task to the CPU */
BUG_ON(cpu != raw_smp_processor_id());
sprintf(name, "intel-ucode/%02x-%02x-%02x",
c->x86, c->x86_model, c->x86_mask);
- error = request_firmware(&firmware, name, µcode_pdev->dev);
- if (error) {
+ ret = request_firmware(&firmware, name, device);
+ if (ret) {
pr_debug("microcode: data file %s load failed\n", name);
- return error;
+ return ret;
}
- buf = firmware->data;
- size = firmware->size;
- while ((offset = get_next_ucode_from_buffer(&mc, buf, size, offset))
- > 0) {
- error = microcode_sanity_check(mc);
- if (error)
- break;
- error = get_matching_microcode(mc, cpu);
- if (error < 0)
- break;
- /*
- * It's possible the data file has multiple matching ucode,
- * lets keep searching till the latest version
- */
- if (error == 1) {
- apply_microcode(cpu);
- error = 0;
- }
- vfree(mc);
- }
- if (offset > 0)
- vfree(mc);
- if (offset < 0)
- error = offset;
+
+ ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
+ &get_ucode_fw);
+
release_firmware(firmware);
- return error;
+ return ret;
}
-int apply_microcode_check_cpu(int cpu)
+static int get_ucode_user(void *to, const void *from, size_t n)
{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- cpumask_t old;
- cpumask_of_cpu_ptr(newmask, cpu);
- unsigned int val[2];
- int err = 0;
-
- /* Check if the microcode is available */
- if (!uci->mc)
- return 0;
-
- old = current->cpus_allowed;
- set_cpus_allowed_ptr(current, newmask);
-
- /* Check if the microcode we have in memory matches the CPU */
- if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
- cpu_has(c, X86_FEATURE_IA64) || uci->sig != cpuid_eax(0x00000001))
- err = -EINVAL;
-
- if (!err && ((c->x86_model >= 5) || (c->x86 > 6))) {
- /* get processor flags from MSR 0x17 */
- rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
- if (uci->pf != (1 << ((val[1] >> 18) & 7)))
- err = -EINVAL;
- }
-
- if (!err) {
- wrmsr(MSR_IA32_UCODE_REV, 0, 0);
- /* see notes above for revision 1.07. Apparent chip bug */
- sync_core();
- /* get the current revision from MSR 0x8B */
- rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
- if (uci->rev != val[1])
- err = -EINVAL;
- }
+ return copy_from_user(to, from, n);
+}
- if (!err)
- apply_microcode(cpu);
- else
- printk(KERN_ERR "microcode: Could not apply microcode to CPU%d:"
- " sig=0x%x, pf=0x%x, rev=0x%x\n",
- cpu, uci->sig, uci->pf, uci->rev);
+static int request_microcode_user(int cpu, const void __user *buf, size_t size)
+{
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu != raw_smp_processor_id());
- set_cpus_allowed_ptr(current, &old);
- return err;
+ return generic_load_microcode(cpu, (void*)buf, size, &get_ucode_user);
}
-void microcode_fini_cpu(int cpu)
+static void microcode_fini_cpu(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- mutex_lock(µcode_mutex);
- uci->valid = 0;
- kfree(uci->mc);
+ vfree(uci->mc);
uci->mc = NULL;
- mutex_unlock(µcode_mutex);
}
+
+struct microcode_ops microcode_intel_ops = {
+ .request_microcode_user = request_microcode_user,
+ .request_microcode_fw = request_microcode_fw,
+ .collect_cpu_info = collect_cpu_info,
+ .apply_microcode = apply_microcode,
+ .microcode_fini_cpu = microcode_fini_cpu,
+};
+
+struct microcode_ops * __init init_intel_microcode(void)
+{
+ return µcode_intel_ops;
+}
+
projects / linux-2.6-omap-h63xx.git / blobdiff