x86: moved microcode.c to microcode_intel.c

Combine both generic and arch-specific parts of microcode into a
single module (arch-specific parts are config-dependent).

Also while we are at it, move arch-specific parts from microcode.h
into their respective arch-specific .c files.

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Cc: "Peter Oruba" <peter.oruba@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 112 insertions, 73 deletions

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index be454f348c3b..f891996f6849 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -51,9 +51,6 @@ obj-$(CONFIG_X86_BIOS_REBOOT)	+= reboot.o
 obj-$(CONFIG_MCA)               += mca_32.o
 obj-$(CONFIG_X86_MSR)           += msr.o
 obj-$(CONFIG_X86_CPUID)         += cpuid.o
-obj-$(CONFIG_MICROCODE)         += microcode.o
-obj-$(CONFIG_MICROCODE_INTEL)   += microcode_intel.o
-obj-$(CONFIG_MICROCODE_AMD)     += microcode_amd.o
 obj-$(CONFIG_PCI)               += early-quirks.o
 apm-y                           := apm_32.o
 obj-$(CONFIG_APM)               += apm.o
@@ -101,6 +98,11 @@ scx200-y			+= scx200_32.o
 
 obj-$(CONFIG_OLPC)              += olpc.o
 
+microcode-y                             := microcode_core.o
+microcode-$(CONFIG_MICROCODE_INTEL)     += microcode_intel.o
+microcode-$(CONFIG_MICROCODE_AMD)       += microcode_amd.o
+obj-$(CONFIG_MICROCODE)                 += microcode.o
+
 ###
 # 64 bit specific files
 ifeq ($(CONFIG_X86_64),y)
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 48aec9f48e4f..03ea4e52e87a 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -46,6 +46,35 @@ MODULE_LICENSE("GPL v2");
 #define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000
 #define UCODE_UCODE_TYPE           0x00000001
 
+struct equiv_cpu_entry {
+        unsigned int installed_cpu;
+        unsigned int fixed_errata_mask;
+        unsigned int fixed_errata_compare;
+        unsigned int equiv_cpu;
+};
+
+struct microcode_header_amd {
+        unsigned int  data_code;
+        unsigned int  patch_id;
+        unsigned char mc_patch_data_id[2];
+        unsigned char mc_patch_data_len;
+        unsigned char init_flag;
+        unsigned int  mc_patch_data_checksum;
+        unsigned int  nb_dev_id;
+        unsigned int  sb_dev_id;
+        unsigned char processor_rev_id[2];
+        unsigned char nb_rev_id;
+        unsigned char sb_rev_id;
+        unsigned char bios_api_rev;
+        unsigned char reserved1[3];
+        unsigned int  match_reg[8];
+};
+
+struct microcode_amd {
+        struct microcode_header_amd hdr;
+        unsigned int mpb[0];
+};
+
 #define UCODE_MAX_SIZE          (2048)
 #define DEFAULT_UCODE_DATASIZE  (896)
 #define MC_HEADER_SIZE          (sizeof(struct microcode_header_amd))
@@ -189,17 +218,18 @@ static void apply_microcode_amd(int cpu)
         unsigned int rev;
         int cpu_num = raw_smp_processor_id();
         struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
+        struct microcode_amd *mc_amd = uci->mc;
         unsigned long addr;
 
         /* We should bind the task to the CPU */
         BUG_ON(cpu_num != cpu);
 
-        if (uci->mc.mc_amd == NULL)
+        if (mc_amd == NULL)
                 return;
 
         spin_lock_irqsave(&microcode_update_lock, flags);
 
-        addr = (unsigned long)&uci->mc.mc_amd->hdr.data_code;
+        addr = (unsigned long)&mc_amd->hdr.data_code;
         edx = (unsigned int)(((unsigned long)upper_32_bits(addr)));
         eax = (unsigned int)(((unsigned long)lower_32_bits(addr)));
 
@@ -214,16 +244,16 @@ static void apply_microcode_amd(int cpu)
         spin_unlock_irqrestore(&microcode_update_lock, flags);
 
         /* check current patch id and patch's id for match */
-        if (rev != uci->mc.mc_amd->hdr.patch_id) {
+        if (rev != mc_amd->hdr.patch_id) {
                 printk(KERN_ERR "microcode: CPU%d update from revision "
                        "0x%x to 0x%x failed\n", cpu_num,
-                       uci->mc.mc_amd->hdr.patch_id, rev);
+                       mc_amd->hdr.patch_id, rev);
                 return;
         }
 
         printk(KERN_INFO "microcode: CPU%d updated from revision "
                "0x%x to 0x%x \n",
-               cpu_num, uci->cpu_sig.rev, uci->mc.mc_amd->hdr.patch_id);
+               cpu_num, uci->cpu_sig.rev, mc_amd->hdr.patch_id);
 
         uci->cpu_sig.rev = rev;
 }
@@ -355,12 +385,12 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
 
         if (new_mc) {
                 if (!leftover) {
-                        if (uci->mc.mc_amd)
-                                vfree(uci->mc.mc_amd);
-                        uci->mc.mc_amd = (struct microcode_amd *)new_mc;
+                        if (uci->mc)
+                                vfree(uci->mc);
+                        uci->mc = new_mc;
                         pr_debug("microcode: CPU%d found a matching microcode update with"
                                 " version 0x%x (current=0x%x)\n",
-                                cpu, uci->mc.mc_amd->hdr.patch_id, uci->cpu_sig.rev);
+                                cpu, new_rev, uci->cpu_sig.rev);
                 } else
                         vfree(new_mc);
         }
@@ -416,8 +446,8 @@ static void microcode_fini_cpu_amd(int cpu)
 {
         struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
 
-        vfree(uci->mc.mc_amd);
-        uci->mc.mc_amd = NULL;
+        vfree(uci->mc);
+        uci->mc = NULL;
 }
 
 static struct microcode_ops microcode_amd_ops = {
@@ -428,23 +458,7 @@ static struct microcode_ops microcode_amd_ops = {
         .microcode_fini_cpu               = microcode_fini_cpu_amd,
 };
 
-static int __init microcode_amd_module_init(void)
+struct microcode_ops * __init init_amd_microcode(void)
 {
-        struct cpuinfo_x86 *c = &cpu_data(0);
-
-        equiv_cpu_table = NULL;
-        if (c->x86_vendor != X86_VENDOR_AMD) {
-                printk(KERN_ERR "microcode: CPU platform is not AMD-capable\n");
-                return -ENODEV;
-        }
-
-        return microcode_init(&microcode_amd_ops, THIS_MODULE);
-}
-
-static void __exit microcode_amd_module_exit(void)
-{
-        microcode_exit();
+        return &microcode_amd_ops;
 }
-
-module_init(microcode_amd_module_init)
-module_exit(microcode_amd_module_exit)
diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode_core.c
index 0c2634f4fd7c..ff031dbccdf6 100644
--- a/arch/x86/kernel/microcode.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -298,7 +298,7 @@ static int microcode_resume_cpu(int cpu)
 
         pr_debug("microcode: CPU%d resumed\n", cpu);
 
-        if (!uci->mc.valid_mc)
+        if (!uci->mc)
                 return 1;
 
         /*
@@ -443,17 +443,20 @@ static struct notifier_block __refdata mc_cpu_notifier = {
         .notifier_call = mc_cpu_callback,
 };
 
-int microcode_init(void *opaque, struct module *module)
+static int __init microcode_init(void)
 {
-        struct microcode_ops *ops = (struct microcode_ops *)opaque;
+        struct cpuinfo_x86 *c = &cpu_data(0);
         int error;
 
-        if (microcode_ops) {
-                printk(KERN_ERR "microcode: already loaded the other module\n");
-                return -EEXIST;
-        }
+        if (c->x86_vendor == X86_VENDOR_INTEL)
+                microcode_ops = init_intel_microcode();
+        else if (c->x86_vendor != X86_VENDOR_AMD)
+                microcode_ops = init_amd_microcode();
 
-        microcode_ops = ops;
+        if (!microcode_ops) {
+                printk(KERN_ERR "microcode: no support for this CPU vendor\n");
+                return -ENODEV;
+        }
 
         error = microcode_dev_init();
         if (error)
@@ -483,9 +486,8 @@ int microcode_init(void *opaque, struct module *module)
 
         return 0;
 }
-EXPORT_SYMBOL_GPL(microcode_init);
 
-void __exit microcode_exit(void)
+static void __exit microcode_exit(void)
 {
         microcode_dev_exit();
 
@@ -502,4 +504,6 @@ void __exit microcode_exit(void)
         printk(KERN_INFO
                "Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
 }
-EXPORT_SYMBOL_GPL(microcode_exit);
+
+module_init(microcode_init);
+module_exit(microcode_exit);
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index 48ed3cef58c1..622dc4a21784 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -97,6 +97,38 @@ MODULE_DESCRIPTION("Microcode Update Driver");
 MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
 MODULE_LICENSE("GPL");
 
+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)
@@ -284,11 +316,12 @@ static void apply_microcode(int cpu)
         unsigned int val[2];
         int cpu_num = raw_smp_processor_id();
         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.mc_intel == NULL)
+        if (mc_intel == NULL)
                 return;
 
         /* serialize access to the physical write to MSR 0x79 */
@@ -296,8 +329,8 @@ static void apply_microcode(int cpu)
 
         /* write microcode via MSR 0x79 */
         wrmsr(MSR_IA32_UCODE_WRITE,
-              (unsigned long) uci->mc.mc_intel->bits,
-              (unsigned long) uci->mc.mc_intel->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 */
@@ -307,7 +340,7 @@ static void apply_microcode(int cpu)
         rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);
 
         spin_unlock_irqrestore(&microcode_update_lock, flags);
-        if (val[1] != uci->mc.mc_intel->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->cpu_sig.rev, val[1]);
                 return;
@@ -315,9 +348,9 @@ static void apply_microcode(int cpu)
         printk(KERN_INFO "microcode: CPU%d updated from revision "
                "0x%x to 0x%x, date = %04x-%02x-%02x \n",
                 cpu_num, uci->cpu_sig.rev, val[1],
-                uci->mc.mc_intel->hdr.date & 0xffff,
-                uci->mc.mc_intel->hdr.date >> 24,
-                (uci->mc.mc_intel->hdr.date >> 16) & 0xff);
+                mc_intel->hdr.date & 0xffff,
+                mc_intel->hdr.date >> 24,
+                (mc_intel->hdr.date >> 16) & 0xff);
         uci->cpu_sig.rev = val[1];
 }
 
@@ -367,12 +400,12 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
 
         if (new_mc) {
                 if (!leftover) {
-                        if (uci->mc.mc_intel)
-                                vfree(uci->mc.mc_intel);
-                        uci->mc.mc_intel = (struct microcode_intel *)new_mc;
+                        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, uci->mc.mc_intel->hdr.rev, uci->cpu_sig.rev);
+                                cpu, new_rev, uci->cpu_sig.rev);
                 } else
                         vfree(new_mc);
         }
@@ -428,11 +461,11 @@ static void microcode_fini_cpu(int cpu)
 {
         struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
 
-        vfree(uci->mc.mc_intel);
-        uci->mc.mc_intel = NULL;
+        vfree(uci->mc);
+        uci->mc = NULL;
 }
 
-static struct microcode_ops microcode_intel_ops = {
+struct microcode_ops microcode_intel_ops = {
         .request_microcode_user           = request_microcode_user,
         .request_microcode_fw             = request_microcode_fw,
         .collect_cpu_info                 = collect_cpu_info,
@@ -440,22 +473,8 @@ static struct microcode_ops microcode_intel_ops = {
         .microcode_fini_cpu               = microcode_fini_cpu,
 };
 
-static int __init microcode_intel_module_init(void)
-{
-        struct cpuinfo_x86 *c = &cpu_data(0);
-
-        if (c->x86_vendor != X86_VENDOR_INTEL) {
-                printk(KERN_ERR "microcode: CPU platform is not Intel-capable\n");
-                return -ENODEV;
-        }
-
-        return microcode_init(&microcode_intel_ops, THIS_MODULE);
-}
-
-static void __exit microcode_intel_module_exit(void)
+struct microcode_ops * __init init_intel_microcode(void)
 {
-        microcode_exit();
+        return &microcode_intel_ops;
 }
 
-module_init(microcode_intel_module_init)
-module_exit(microcode_intel_module_exit)