diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 21 | ||||
| -rw-r--r-- | arch/x86/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/microcode_amd.c | 521 |
3 files changed, 539 insertions, 4 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6b0b885cf47..7bb461758d3 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -786,10 +786,12 @@ config MICROCODE select FW_LOADER ---help--- If you say Y here, you will be able to update the microcode on - Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II, - Pentium III, Pentium 4, Xeon etc. You will obviously need the - actual microcode binary data itself which is not shipped with the - Linux kernel. + certain Intel and AMD processors. The Intel support is for the + IA32 family, e.g. Pentium Pro, Pentium II, Pentium III, + Pentium 4, Xeon etc. The AMD support is for family 0x10 and + 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra. + You will obviously need the actual microcode binary data itself + which is not shipped with the Linux kernel. This option selects the general module only, you need to select at least one vendor specific module as well. @@ -813,6 +815,17 @@ config MICROCODE_INTEL This driver is only available as a module: the module will be called microcode_intel. +config MICROCODE_AMD + tristate "AMD microcode patch loading support" + depends on MICROCODE + select FW_LOADER + --help--- + If you select this option, microcode patch loading support for AMD + processors will be enabled. + + This driver is only available as a module: the module + will be called microcode_amd. + config MICROCODE_OLD_INTERFACE def_bool y depends on MICROCODE diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index f2f9f6da8c1..be454f348c3 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -53,6 +53,7 @@ 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 diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c new file mode 100644 index 00000000000..db199e3fdd1 --- /dev/null +++ b/arch/x86/kernel/microcode_amd.c @@ -0,0 +1,521 @@ +/* + * AMD CPU Microcode Update Driver for Linux + * Copyright (C) 2008 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. + * + * Licensed unter the terms of the GNU General Public + * License version 2. See file COPYING for details. +*/ + +#include <linux/capability.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/cpumask.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/miscdevice.h> +#include <linux/spinlock.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/mutex.h> +#include <linux/cpu.h> +#include <linux/firmware.h> +#include <linux/platform_device.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> + +#include <asm/msr.h> +#include <asm/uaccess.h> +#include <asm/processor.h> +#include <asm/microcode.h> + +MODULE_DESCRIPTION("AMD Microcode Update Driver"); +MODULE_AUTHOR("Peter Oruba <peter.oruba@amd.com>"); +MODULE_LICENSE("GPLv2"); + +#define UCODE_MAGIC 0x00414d44 +#define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000 +#define UCODE_UCODE_TYPE 0x00000001 + +#define UCODE_MAX_SIZE (2048) +#define DEFAULT_UCODE_DATASIZE (896) /* 896 bytes */ +#define MC_HEADER_SIZE (sizeof(struct microcode_header_amd)) /* 64 bytes */ +#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 960 bytes */ +#define DWSIZE (sizeof(u32)) +/* For now we support a fixed ucode total size only */ +#define get_totalsize(mc) \ + ((((struct microcode_amd *)mc)->hdr.mc_patch_data_len * 28) \ + + MC_HEADER_SIZE) + +extern int microcode_init(void *opaque, struct module *module); +extern void microcode_exit(void); + +/* serialize access to the physical write */ +static DEFINE_SPINLOCK(microcode_update_lock); + +/* no concurrent ->write()s are allowed on /dev/cpu/microcode */ +extern struct mutex (microcode_mutex); + +struct equiv_cpu_entry *equiv_cpu_table; + +extern struct ucode_cpu_info ucode_cpu_info[NR_CPUS]; + +static void collect_cpu_info_amd(int cpu) +{ + struct cpuinfo_x86 *c = &cpu_data(cpu); + struct ucode_cpu_info *uci = ucode_cpu_info + cpu; + + /* We should bind the task to the CPU */ + BUG_ON(raw_smp_processor_id() != cpu); + uci->rev = 0; + uci->pf = 0; + uci->mc.mc_amd = NULL; + uci->valid = 1; + + if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) { + printk(KERN_ERR "microcode: CPU%d not a capable AMD processor\n", + cpu); + uci->valid = 0; + return; + } + + asm volatile("movl %1, %%ecx; rdmsr" + : "=a" (uci->rev) + : "i" (0x0000008B) : "ecx"); + + printk(KERN_INFO "microcode: collect_cpu_info_amd : patch_id=0x%x\n", + uci->rev); +} + +static int get_matching_microcode_amd(void *mc, int cpu) +{ + struct ucode_cpu_info *uci = ucode_cpu_info + cpu; + struct microcode_header_amd *mc_header = mc; + unsigned long total_size = get_totalsize(mc_header); + void *new_mc; + struct pci_dev *nb_pci_dev, *sb_pci_dev; + unsigned int current_cpu_id; + unsigned int equiv_cpu_id = 0x00; + unsigned int i = 0; + + /* We should bind the task to the CPU */ + BUG_ON(cpu != raw_smp_processor_id()); + + /* This is a tricky part. We might be called from a write operation */ + /* to the device file instead of the usual process of firmware */ + /* loading. This routine needs to be able to distinguish both */ +/* cases. This is done by checking if there alread is a equivalent */ + /* CPU table installed. If not, we're written through */ + /* /dev/cpu/microcode. */ +/* Since we ignore all checks. The error case in which going through */ +/* firmware loading and that table is not loaded has already been */ + /* checked earlier. */ + if (equiv_cpu_table == NULL) { + printk(KERN_INFO "microcode: CPU%d microcode update with " + "version 0x%x (current=0x%x)\n", + cpu, mc_header->patch_id, uci->rev); + goto out; + } + + 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; + } + i++; + } + + if (!equiv_cpu_id) { + printk(KERN_ERR "microcode: CPU%d cpu_id " + "not found in equivalent cpu table \n", cpu); + return 0; + } + + if ((mc_header->processor_rev_id[0]) != (equiv_cpu_id & 0xff)) { + printk(KERN_ERR + "microcode: CPU%d patch does not match " + "(patch is %x, cpu extended is %x) \n", + cpu, mc_header->processor_rev_id[0], + (equiv_cpu_id & 0xff)); + return 0; + } + + if ((mc_header->processor_rev_id[1]) != ((equiv_cpu_id >> 16) & 0xff)) { + printk(KERN_ERR "microcode: CPU%d patch does not match " + "(patch is %x, cpu base id is %x) \n", + cpu, mc_header->processor_rev_id[1], + ((equiv_cpu_id >> 16) & 0xff)); + + return 0; + } + + /* ucode may be northbridge specific */ + if (mc_header->nb_dev_id) { + nb_pci_dev = pci_get_device(PCI_VENDOR_ID_AMD, + (mc_header->nb_dev_id & 0xff), + NULL); + if ((!nb_pci_dev) || + (mc_header->nb_rev_id != nb_pci_dev->revision)) { + printk(KERN_ERR "microcode: CPU%d NB mismatch \n", cpu); + pci_dev_put(nb_pci_dev); + return 0; + } + pci_dev_put(nb_pci_dev); + } + + /* ucode may be southbridge specific */ + if (mc_header->sb_dev_id) { + sb_pci_dev = pci_get_device(PCI_VENDOR_ID_AMD, + (mc_header->sb_dev_id & 0xff), + NULL); + if ((!sb_pci_dev) || + (mc_header->sb_rev_id != sb_pci_dev->revision)) { + printk(KERN_ERR "microcode: CPU%d SB mismatch \n", cpu); + pci_dev_put(sb_pci_dev); + return 0; + } + pci_dev_put(sb_pci_dev); + } + + if (mc_header->patch_id <= uci->rev) + return 0; + + printk(KERN_INFO "microcode: CPU%d found a matching microcode " + "update with version 0x%x (current=0x%x)\n", + cpu, mc_header->patch_id, uci->rev); + +out: + new_mc = vmalloc(UCODE_MAX_SIZE); + if (!new_mc) { + printk(KERN_ERR "microcode: error, can't allocate memory\n"); + return -ENOMEM; + } + memset(new_mc, 0, UCODE_MAX_SIZE); + + /* free previous update file */ + vfree(uci->mc.mc_amd); + + memcpy(new_mc, mc, total_size); + + uci->mc.mc_amd = new_mc; + return 1; +} + +static void apply_microcode_amd(int cpu) +{ + unsigned long flags; + unsigned int eax, edx; + unsigned int rev; + int cpu_num = raw_smp_processor_id(); + struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; + + /* We should bind the task to the CPU */ + BUG_ON(cpu_num != cpu); + + if (uci->mc.mc_amd == NULL) + return; + + spin_lock_irqsave(µcode_update_lock, flags); + + edx = (unsigned int)(((unsigned long) + &(uci->mc.mc_amd->hdr.data_code)) >> 32); + eax = (unsigned int)(((unsigned long) + &(uci->mc.mc_amd->hdr.data_code)) & 0xffffffffL); + + asm volatile("movl %0, %%ecx; wrmsr" : + : "i" (0xc0010020), "a" (eax), "d" (edx) : "ecx"); + + /* get patch id after patching */ + asm volatile("movl %1, %%ecx; rdmsr" + : "=a" (rev) + : "i" (0x0000008B) : "ecx"); + + spin_unlock_irqrestore(µcode_update_lock, flags); + + /* check current patch id and patch's id for match */ + if (rev != uci->mc.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); + return; + } + + printk(KERN_INFO "microcode: CPU%d updated from revision " + "0x%x to 0x%x \n", + cpu_num, uci->rev, uci->mc.mc_amd->hdr.patch_id); + + uci->rev = rev; +} + +#ifdef CONFIG_MICROCODE_OLD_INTERFACE +extern void __user *user_buffer; /* user area microcode data buffer */ +extern unsigned int user_buffer_size; /* it's size */ + +static long get_next_ucode_amd(void **mc, long offset) +{ + struct microcode_header_amd mc_header; + unsigned long total_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(UCODE_MAX_SIZE); + if (!*mc) + return -ENOMEM; + memset(*mc, 0, UCODE_MAX_SIZE); + + 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; +} +#else +#define get_next_ucode_amd() NULL +#endif + +static long get_next_ucode_from_buffer_amd(void **mc, void *buf, + unsigned long size, long offset) +{ + struct microcode_header_amd *mc_header; + unsigned long total_size; + unsigned char *buf_pos = buf; + + /* No more data */ + if (offset >= size) + return 0; + + if (buf_pos[offset] != UCODE_UCODE_TYPE) { + printk(KERN_ERR "microcode: error! " + "Wrong microcode payload type field\n"); + return -EINVAL; + } + + mc_header = (struct microcode_header_amd *)(&buf_pos[offset+8]); + + total_size = (unsigned long) (buf_pos[offset+4] + + (buf_pos[offset+5] << 8)); + + printk(KERN_INFO "microcode: size %lu, total_size %lu, offset %ld\n", + size, total_size, offset); + + if (offset + total_size > size) { + printk(KERN_ERR "microcode: error! Bad data in microcode data file\n"); + return -EINVAL; + } + + *mc = vmalloc(UCODE_MAX_SIZE); + if (!*mc) { + printk(KERN_ERR "microcode: error! " + "Can not allocate memory for microcode patch\n"); + return -ENOMEM; + } + + memset(*mc, 0, UCODE_MAX_SIZE); + memcpy(*mc, buf + offset + 8, total_size); + + return offset + total_size + 8; +} + +static long install_equiv_cpu_table(void *buf, unsigned long size, long offset) +{ + unsigned int *buf_pos = buf; + + /* No more data */ + if (offset >= size) + return 0; + + if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE) { + printk(KERN_ERR "microcode: error! " + "Wrong microcode equivalnet cpu table type field\n"); + return 0; + } + + if (size == 0) { + printk(KERN_ERR "microcode: error! " + "Wrong microcode equivalnet cpu table length\n"); + return 0; + } + + equiv_cpu_table = (struct equiv_cpu_entry *) vmalloc(size); + if (!equiv_cpu_table) { + printk(KERN_ERR "microcode: error, can't allocate memory for equiv CPU table\n"); + return 0; + } + + memset(equiv_cpu_table, 0, size); + memcpy(equiv_cpu_table, &buf_pos[3], size); + + return size + 12; /* add header length */ +} + +/* fake device for request_firmware */ +extern struct platform_device *microcode_pdev; + +static int cpu_request_microcode_amd(int cpu) +{ + char name[30]; + const struct firmware *firmware; + void *buf; + unsigned int *buf_pos; + unsigned long size; + long offset = 0; + int error; + void *mc; + + /* We should bind the task to the CPU */ + BUG_ON(cpu != raw_smp_processor_id()); + + sprintf(name, "amd-ucode/microcode_amd.bin"); + error = request_firmware(&firmware, "amd-ucode/microcode_amd.bin", + µcode_pdev->dev); + if (error) { + printk(KERN_ERR "microcode: ucode data file %s load failed\n", + name); + return error; + } + + buf_pos = buf = firmware->data; + size = firmware->size; + + if (buf_pos[0] != UCODE_MAGIC) { + printk(KERN_ERR "microcode: error! Wrong microcode patch file magic\n"); + return -EINVAL; + } + + offset = install_equiv_cpu_table(buf, buf_pos[2], offset); + + if (!offset) { + printk(KERN_ERR "microcode: installing equivalent cpu table failed\n"); + return -EINVAL; + } + + while ((offset = + get_next_ucode_from_buffer_amd(&mc, buf, size, offset)) > 0) { + error = get_matching_microcode_amd(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_amd(cpu); + error = 0; + } + vfree(mc); + } + if (offset > 0) { + vfree(mc); + vfree(equiv_cpu_table); + equiv_cpu_table = NULL; + } + if (offset < 0) + error = offset; + release_firmware(firmware); + + return error; +} + +static int apply_microcode_check_cpu_amd(int cpu) +{ + struct cpuinfo_x86 *c = &cpu_data(cpu); + struct ucode_cpu_info *uci = ucode_cpu_info + cpu; + unsigned int rev; + cpumask_t old; + cpumask_of_cpu_ptr(newmask, cpu); + int err = 0; + + /* Check if the microcode is available */ + if (!uci->mc.mc_amd) + return 0; + + old = current->cpus_allowed; + set_cpus_allowed(current, newmask); + + /* Check if the microcode we have in memory matches the CPU */ + if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 16) + err = -EINVAL; + + if (!err) { + asm volatile("movl %1, %%ecx; rdmsr" + : "=a" (rev) + : "i" (0x0000008B) : "ecx"); + + if (uci->rev != rev) + err = -EINVAL; + } + + if (!err) + apply_microcode_amd(cpu); + else + printk(KERN_ERR "microcode: Could not apply microcode to CPU%d:" + " rev=0x%x\n", + cpu, uci->rev); + + set_cpus_allowed(current, old); + return err; +} + +static void microcode_fini_cpu_amd(int cpu) +{ + struct ucode_cpu_info *uci = ucode_cpu_info + cpu; + + mutex_lock(µcode_mutex); + uci->valid = 0; + vfree(uci->mc.mc_amd); + uci->mc.mc_amd = NULL; + mutex_unlock(µcode_mutex); +} + +static struct microcode_ops microcode_amd_ops = { + .get_next_ucode = get_next_ucode_amd, + .get_matching_microcode = get_matching_microcode_amd, + .microcode_sanity_check = NULL, + .apply_microcode_check_cpu = apply_microcode_check_cpu_amd, + .cpu_request_microcode = cpu_request_microcode_amd, + .collect_cpu_info = collect_cpu_info_amd, + .apply_microcode = apply_microcode_amd, + .microcode_fini_cpu = microcode_fini_cpu_amd, +}; + +static int __init microcode_amd_module_init(void) +{ + struct cpuinfo_x86 *c = &cpu_data(get_cpu()); + + equiv_cpu_table = NULL; + if (c->x86_vendor == X86_VENDOR_AMD) + return microcode_init(µcode_amd_ops, THIS_MODULE); + else + return -ENODEV; +} + +static void __exit microcode_amd_module_exit(void) +{ + microcode_exit(); +} + +module_init(microcode_amd_module_init) +module_exit(microcode_amd_module_exit) |