Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754762AbYGYQT3 (ORCPT ); Fri, 25 Jul 2008 12:19:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753828AbYGYQRh (ORCPT ); Fri, 25 Jul 2008 12:17:37 -0400 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:26979 "EHLO SG2EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753444AbYGYQRc (ORCPT ); Fri, 25 Jul 2008 12:17:32 -0400 X-BigFish: VPS5(zz1cddkzz10d3izzz32i66h) X-Spam-TCS-SCL: 5:0 X-WSS-ID: 0K4KL8J-02-OZO-01 Message-ID: <20080725162003.347794240@amd.com> User-Agent: quilt/0.46_cvs20080326-19.1 Date: Fri, 25 Jul 2008 18:17:31 +0200 From: Peter Oruba To: Ingo Molnar , Thomas Gleixner , Tigran Aivazian CC: LKML , Peter Oruba Subject: [patch 8/9] [PATCH 8/9] x86: Major refactoring. References: <20080725161723.636932280@amd.com> Content-Disposition: inline; filename="0008-x86-Major-refactoring.patch" X-OriginalArrivalTime: 25 Jul 2008 16:17:08.0729 (UTC) FILETIME=[E3015690:01C8EE71] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 13613 Lines: 410 Refactored code by introducing a two-module solution. There is one general module in which vendor specific modules can hook into. However, that is exclusive, there is only one vendor specific module allowed at a time. A CPU vendor check makes sure only the corect module for the underlying system gets called. Functinally in terms of patch loading itself there are no changes. This refactoring provides a basis for future implementations of other vendors' patch loaders. Signed-off-by: Peter Oruba --- arch/x86/Kconfig | 24 +++++++++-- arch/x86/kernel/Makefile | 4 +- arch/x86/kernel/microcode.c | 80 +++++++++++++++++++++--------------- arch/x86/kernel/microcode_intel.c | 54 ++++++++++++++++++++----- 4 files changed, 112 insertions(+), 50 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 03980cb..ece1e27 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -782,7 +782,7 @@ config X86_REBOOTFIXUPS Say N otherwise. config MICROCODE - tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support" + tristate "/dev/cpu/microcode - microcode support" select FW_LOADER ---help--- If you say Y here, you will be able to update the microcode on @@ -791,14 +791,28 @@ config MICROCODE actual microcode binary data itself which is not shipped with the Linux kernel. - For latest news and information on obtaining all the required - ingredients for this driver, check: - . + This option selects the general module only, you need to select + at least one vendor specific module as well. To compile this driver as a module, choose M here: the module will be called microcode. -config MICROCODE_OLD_INTERFACE +config MICROCODE_INTEL + tristate "Intel microcode patch loading support" + depends on MICROCODE + select FW_LOADER + --help--- + This options enables microcode patch loading support for Intel + processors. + + For latest news and information on obtaining all the required + Intel ingredients for this driver, check: + . + + This driver is only available as a module: the module + will be called microcode_intel. + + config MICROCODE_OLD_INTERFACE def_bool y depends on MICROCODE diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index abb32ae..f2f9f6d 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -51,8 +51,8 @@ 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-$(CONFIG_MICROCODE) += ucode.o -ucode-objs := microcode.o microcode_intel.o +obj-$(CONFIG_MICROCODE) += microcode.o +obj-$(CONFIG_MICROCODE_INTEL) += microcode_intel.o obj-$(CONFIG_PCI) += early-quirks.o apm-y := apm_32.o obj-$(CONFIG_APM) += apm.o diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c index 72b899c..f6414bc 100644 --- a/arch/x86/kernel/microcode.c +++ b/arch/x86/kernel/microcode.c @@ -99,25 +99,22 @@ MODULE_DESCRIPTION("Microcode Update Driver"); MODULE_AUTHOR("Tigran Aivazian "); MODULE_LICENSE("GPL"); -#define MICROCODE_VERSION "1.14a" +#define MICROCODE_VERSION "2.00" -/* no concurrent ->write()s are allowed on /dev/cpu/microcode */ -DEFINE_MUTEX(microcode_mutex); +struct microcode_ops *microcode_ops; -struct ucode_cpu_info ucode_cpu_info[NR_CPUS]; +/* no concurrent ->write()s are allowed on /dev/cpu/microcode */ +static DEFINE_MUTEX(microcode_mutex); +EXPORT_SYMBOL_GPL(microcode_mutex); -extern long get_next_ucode(void **mc, long offset); -extern int microcode_sanity_check(void *mc); -extern int get_matching_microcode(void *mc, int cpu); -extern void collect_cpu_info(int cpu_num); -extern int cpu_request_microcode(int cpu); -extern void microcode_fini_cpu(int cpu); -extern void apply_microcode(int cpu); -extern int apply_microcode_check_cpu(int cpu); +static struct ucode_cpu_info ucode_cpu_info[NR_CPUS]; +EXPORT_SYMBOL_GPL(ucode_cpu_info); #ifdef CONFIG_MICROCODE_OLD_INTERFACE -void __user *user_buffer; /* user area microcode data buffer */ -unsigned int user_buffer_size; /* it's size */ +static void __user *user_buffer; /* user area microcode data buffer */ +EXPORT_SYMBOL_GPL(user_buffer); +static unsigned int user_buffer_size; /* it's size */ +EXPORT_SYMBOL_GPL(user_buffer_size); static int do_microcode_update (void) { @@ -129,8 +126,8 @@ static int do_microcode_update (void) old = current->cpus_allowed; - while ((cursor = get_next_ucode(&new_mc, cursor)) > 0) { - error = microcode_sanity_check(new_mc); + while ((cursor = microcode_ops->get_next_ucode(&new_mc, cursor)) > 0) { + error = microcode_ops->microcode_sanity_check(new_mc); if (error) goto out; /* @@ -143,11 +140,12 @@ static int do_microcode_update (void) if (!uci->valid) continue; set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu)); - error = get_matching_microcode(new_mc, cpu); + error = microcode_ops->get_matching_microcode(new_mc, + cpu); if (error < 0) goto out; if (error == 1) - apply_microcode(cpu); + microcode_ops->apply_microcode(cpu); } vfree(new_mc); } @@ -230,7 +228,8 @@ MODULE_ALIAS_MISCDEV(MICROCODE_MINOR); #endif /* fake device for request_firmware */ -struct platform_device *microcode_pdev; +static struct platform_device *microcode_pdev; +EXPORT_SYMBOL_GPL(microcode_pdev); static void microcode_init_cpu(int cpu, int resume) { @@ -241,9 +240,9 @@ static void microcode_init_cpu(int cpu, int resume) set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu)); mutex_lock(µcode_mutex); - collect_cpu_info(cpu); + microcode_ops->collect_cpu_info(cpu); if (uci->valid && system_state == SYSTEM_RUNNING && !resume) - cpu_request_microcode(cpu); + microcode_ops->cpu_request_microcode(cpu); mutex_unlock(µcode_mutex); set_cpus_allowed_ptr(current, &old); } @@ -268,7 +267,7 @@ static ssize_t reload_store(struct sys_device *dev, const char *buf, size_t sz) mutex_lock(µcode_mutex); if (uci->valid) - err = cpu_request_microcode(cpu); + err = microcode_ops->cpu_request_microcode(cpu); mutex_unlock(µcode_mutex); put_online_cpus(); set_cpus_allowed_ptr(current, &old); @@ -341,7 +340,7 @@ static int mc_sysdev_remove(struct sys_device *sys_dev) return 0; pr_debug("microcode: CPU%d removed\n", cpu); - microcode_fini_cpu(cpu); + microcode_ops->microcode_fini_cpu(cpu); sysfs_remove_group(&sys_dev->kobj, &mc_attr_group); return 0; } @@ -354,7 +353,7 @@ static int mc_sysdev_resume(struct sys_device *dev) return 0; pr_debug("microcode: CPU%d resumed\n", cpu); /* only CPU 0 will apply ucode here */ - apply_microcode(0); + microcode_ops->apply_microcode(0); return 0; } @@ -374,7 +373,7 @@ mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu) switch (action) { case CPU_UP_CANCELED_FROZEN: /* The CPU refused to come up during a system resume */ - microcode_fini_cpu(cpu); + microcode_ops->microcode_fini_cpu(cpu); break; case CPU_ONLINE: case CPU_DOWN_FAILED: @@ -382,9 +381,9 @@ mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu) break; case CPU_ONLINE_FROZEN: /* System-wide resume is in progress, try to apply microcode */ - if (apply_microcode_check_cpu(cpu)) { + if (microcode_ops->apply_microcode_check_cpu(cpu)) { /* The application of microcode failed */ - microcode_fini_cpu(cpu); + microcode_ops->microcode_fini_cpu(cpu); __mc_sysdev_add(sys_dev, 1); break; } @@ -408,12 +407,17 @@ static struct notifier_block __refdata mc_cpu_notifier = { .notifier_call = mc_cpu_callback, }; -static int __init microcode_init (void) +static int microcode_init(void *opaque, struct module *module) { + struct microcode_ops *ops = (struct microcode_ops *)opaque; int error; - printk(KERN_INFO - "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " \n"); + if (microcode_ops) { + printk(KERN_ERR "microcode: already loaded the other module\n"); + return -EEXIST; + } + + microcode_ops = ops; error = microcode_dev_init(); if (error) @@ -435,8 +439,15 @@ static int __init microcode_init (void) } register_hotcpu_notifier(&mc_cpu_notifier); + + printk(KERN_INFO + "Microcode Update Driver: v" MICROCODE_VERSION + " " + " \n"); + return 0; } +EXPORT_SYMBOL_GPL(microcode_init); static void __exit microcode_exit (void) { @@ -449,7 +460,10 @@ static void __exit microcode_exit (void) put_online_cpus(); platform_device_unregister(microcode_pdev); -} -module_init(microcode_init) -module_exit(microcode_exit) + microcode_ops = NULL; + + printk(KERN_INFO + "Microcode Update Driver: v" MICROCODE_VERSION " removed.\n"); +} +EXPORT_SYMBOL_GPL(microcode_exit); diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c index 4754137..dd2133b 100644 --- a/arch/x86/kernel/microcode_intel.c +++ b/arch/x86/kernel/microcode_intel.c @@ -119,6 +119,10 @@ MODULE_LICENSE("GPL"); #define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE) + +extern int microcode_init(void *opaque, struct module *module); +extern void microcode_exit(void); + /* serialize access to the physical write to MSR 0x79 */ static DEFINE_SPINLOCK(microcode_update_lock); @@ -127,7 +131,7 @@ extern struct mutex microcode_mutex; extern struct ucode_cpu_info ucode_cpu_info[NR_CPUS]; -void collect_cpu_info(int cpu_num) +static void collect_cpu_info(int cpu_num) { struct cpuinfo_x86 *c = &cpu_data(cpu_num); struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; @@ -175,7 +179,7 @@ static inline int microcode_update_match(int cpu_num, return 1; } -int microcode_sanity_check(void *mc) +static int microcode_sanity_check(void *mc) { struct microcode_header_intel *mc_header = mc; struct extended_sigtable *ext_header = NULL; @@ -259,7 +263,7 @@ int microcode_sanity_check(void *mc) * return 1 - found update * return < 0 - error */ -int get_matching_microcode(void *mc, int cpu) +static int get_matching_microcode(void *mc, int cpu) { struct ucode_cpu_info *uci = ucode_cpu_info + cpu; struct microcode_header_intel *mc_header = mc; @@ -288,7 +292,8 @@ int get_matching_microcode(void *mc, int cpu) 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); + " 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"); @@ -303,7 +308,7 @@ find: return 1; } -void apply_microcode(int cpu) +static void apply_microcode(int cpu) { unsigned long flags; unsigned int val[2]; @@ -347,7 +352,7 @@ void apply_microcode(int cpu) 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 long get_next_ucode(void **mc, long offset) { struct microcode_header_intel mc_header; unsigned long total_size; @@ -406,7 +411,7 @@ static long get_next_ucode_from_buffer(void **mc, const u8 *buf, /* fake device for request_firmware */ extern struct platform_device *microcode_pdev; -int cpu_request_microcode(int cpu) +static int cpu_request_microcode(int cpu) { char name[30]; struct cpuinfo_x86 *c = &cpu_data(cpu); @@ -455,7 +460,7 @@ int cpu_request_microcode(int cpu) return error; } -int apply_microcode_check_cpu(int cpu) +static int apply_microcode_check_cpu(int cpu) { struct cpuinfo_x86 *c = &cpu_data(cpu); struct ucode_cpu_info *uci = ucode_cpu_info + cpu; @@ -503,13 +508,42 @@ int apply_microcode_check_cpu(int cpu) return err; } -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.mc_intel); + vfree(uci->mc.mc_intel); uci->mc.mc_intel = NULL; mutex_unlock(µcode_mutex); } + +static struct microcode_ops microcode_intel_ops = { + .get_next_ucode = get_next_ucode, + .get_matching_microcode = get_matching_microcode, + .microcode_sanity_check = microcode_sanity_check, + .apply_microcode_check_cpu = apply_microcode_check_cpu, + .cpu_request_microcode = cpu_request_microcode, + .collect_cpu_info = collect_cpu_info, + .apply_microcode = apply_microcode, + .microcode_fini_cpu = microcode_fini_cpu, +}; + +static int __init microcode_intel_module_init(void) +{ + struct cpuinfo_x86 *c = &cpu_data(get_cpu()); + + if (c->x86_vendor == X86_VENDOR_INTEL) + return microcode_init(µcode_intel_ops, THIS_MODULE); + else + return -ENODEV; +} + +static void __exit microcode_intel_module_exit(void) +{ + microcode_exit(); +} + +module_init(microcode_intel_module_init) +module_exit(microcode_intel_module_exit) -- 1.5.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/