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authorBorislav Petkov <bp@suse.de>2013-12-01 18:09:58 +0100
committerBorislav Petkov <bp@suse.de>2014-01-13 20:00:12 +0100
commitbad5fa631fca5466401cd4a48e30cc1f1cb6101e (patch)
tree6049920eea5810bbd38f417f1313fa35f5a0679d /arch/x86/kernel/microcode_amd.c
parent5335ba5cf475369f88db8e6835764efdcad8ab96 (diff)
downloadlinux-linaro-stable-bad5fa631fca5466401cd4a48e30cc1f1cb6101e.tar.gz
x86, microcode: Move to a proper location
We've grown a bunch of microcode loader files all prefixed with "microcode_". They should be under cpu/ because this is strictly CPU-related functionality so do that and drop the prefix since they're in their own directory now which gives that prefix. :) While at it, drop MICROCODE_INTEL_LIB config item and stash the functionality under CONFIG_MICROCODE_INTEL as it was its only user. Signed-off-by: Borislav Petkov <bp@suse.de> Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Diffstat (limited to 'arch/x86/kernel/microcode_amd.c')
-rw-r--r--arch/x86/kernel/microcode_amd.c492
1 files changed, 0 insertions, 492 deletions
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
deleted file mode 100644
index 4a6ff747aaad..000000000000
--- a/arch/x86/kernel/microcode_amd.c
+++ /dev/null
@@ -1,492 +0,0 @@
-/*
- * AMD CPU Microcode Update Driver for Linux
- * Copyright (C) 2008-2011 Advanced Micro Devices Inc.
- *
- * Author: Peter Oruba <peter.oruba@amd.com>
- *
- * Based on work by:
- * Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
- *
- * Maintainers:
- * Andreas Herrmann <herrmann.der.user@googlemail.com>
- * Borislav Petkov <bp@alien8.de>
- *
- * This driver allows to upgrade microcode on F10h AMD
- * CPUs and later.
- *
- * Licensed under the terms of the GNU General Public
- * License version 2. See file COPYING for details.
- */
-
-#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>
-#include <linux/module.h>
-#include <linux/pci.h>
-
-#include <asm/microcode.h>
-#include <asm/processor.h>
-#include <asm/msr.h>
-#include <asm/microcode_amd.h>
-
-MODULE_DESCRIPTION("AMD Microcode Update Driver");
-MODULE_AUTHOR("Peter Oruba");
-MODULE_LICENSE("GPL v2");
-
-static struct equiv_cpu_entry *equiv_cpu_table;
-
-struct ucode_patch {
- struct list_head plist;
- void *data;
- u32 patch_id;
- u16 equiv_cpu;
-};
-
-static LIST_HEAD(pcache);
-
-static u16 __find_equiv_id(unsigned int cpu)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- return find_equiv_id(equiv_cpu_table, uci->cpu_sig.sig);
-}
-
-static u32 find_cpu_family_by_equiv_cpu(u16 equiv_cpu)
-{
- int i = 0;
-
- BUG_ON(!equiv_cpu_table);
-
- while (equiv_cpu_table[i].equiv_cpu != 0) {
- if (equiv_cpu == equiv_cpu_table[i].equiv_cpu)
- return equiv_cpu_table[i].installed_cpu;
- i++;
- }
- return 0;
-}
-
-/*
- * a small, trivial cache of per-family ucode patches
- */
-static struct ucode_patch *cache_find_patch(u16 equiv_cpu)
-{
- struct ucode_patch *p;
-
- list_for_each_entry(p, &pcache, plist)
- if (p->equiv_cpu == equiv_cpu)
- return p;
- return NULL;
-}
-
-static void update_cache(struct ucode_patch *new_patch)
-{
- struct ucode_patch *p;
-
- list_for_each_entry(p, &pcache, plist) {
- if (p->equiv_cpu == new_patch->equiv_cpu) {
- if (p->patch_id >= new_patch->patch_id)
- /* we already have the latest patch */
- return;
-
- list_replace(&p->plist, &new_patch->plist);
- kfree(p->data);
- kfree(p);
- return;
- }
- }
- /* no patch found, add it */
- list_add_tail(&new_patch->plist, &pcache);
-}
-
-static void free_cache(void)
-{
- struct ucode_patch *p, *tmp;
-
- list_for_each_entry_safe(p, tmp, &pcache, plist) {
- __list_del(p->plist.prev, p->plist.next);
- kfree(p->data);
- kfree(p);
- }
-}
-
-static struct ucode_patch *find_patch(unsigned int cpu)
-{
- u16 equiv_id;
-
- equiv_id = __find_equiv_id(cpu);
- if (!equiv_id)
- return NULL;
-
- return cache_find_patch(equiv_id);
-}
-
-static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
-{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- struct ucode_patch *p;
-
- csig->sig = cpuid_eax(0x00000001);
- csig->rev = c->microcode;
-
- /*
- * a patch could have been loaded early, set uci->mc so that
- * mc_bp_resume() can call apply_microcode()
- */
- p = find_patch(cpu);
- if (p && (p->patch_id == csig->rev))
- uci->mc = p->data;
-
- pr_info("CPU%d: patch_level=0x%08x\n", cpu, csig->rev);
-
- return 0;
-}
-
-static unsigned int verify_patch_size(u8 family, u32 patch_size,
- unsigned int size)
-{
- u32 max_size;
-
-#define F1XH_MPB_MAX_SIZE 2048
-#define F14H_MPB_MAX_SIZE 1824
-#define F15H_MPB_MAX_SIZE 4096
-#define F16H_MPB_MAX_SIZE 3458
-
- switch (family) {
- case 0x14:
- max_size = F14H_MPB_MAX_SIZE;
- break;
- case 0x15:
- max_size = F15H_MPB_MAX_SIZE;
- break;
- case 0x16:
- max_size = F16H_MPB_MAX_SIZE;
- break;
- default:
- max_size = F1XH_MPB_MAX_SIZE;
- break;
- }
-
- if (patch_size > min_t(u32, size, max_size)) {
- pr_err("patch size mismatch\n");
- return 0;
- }
-
- return patch_size;
-}
-
-int __apply_microcode_amd(struct microcode_amd *mc_amd)
-{
- u32 rev, dummy;
-
- native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
-
- /* verify patch application was successful */
- native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
- if (rev != mc_amd->hdr.patch_id)
- return -1;
-
- return 0;
-}
-
-int apply_microcode_amd(int cpu)
-{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- struct microcode_amd *mc_amd;
- struct ucode_cpu_info *uci;
- struct ucode_patch *p;
- u32 rev, dummy;
-
- BUG_ON(raw_smp_processor_id() != cpu);
-
- uci = ucode_cpu_info + cpu;
-
- p = find_patch(cpu);
- if (!p)
- return 0;
-
- mc_amd = p->data;
- uci->mc = p->data;
-
- rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
-
- /* need to apply patch? */
- if (rev >= mc_amd->hdr.patch_id) {
- c->microcode = rev;
- uci->cpu_sig.rev = rev;
- return 0;
- }
-
- if (__apply_microcode_amd(mc_amd)) {
- pr_err("CPU%d: update failed for patch_level=0x%08x\n",
- cpu, mc_amd->hdr.patch_id);
- return -1;
- }
- pr_info("CPU%d: new patch_level=0x%08x\n", cpu,
- mc_amd->hdr.patch_id);
-
- uci->cpu_sig.rev = mc_amd->hdr.patch_id;
- c->microcode = mc_amd->hdr.patch_id;
-
- return 0;
-}
-
-static int install_equiv_cpu_table(const u8 *buf)
-{
- unsigned int *ibuf = (unsigned int *)buf;
- unsigned int type = ibuf[1];
- unsigned int size = ibuf[2];
-
- if (type != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
- pr_err("empty section/"
- "invalid type field in container file section header\n");
- return -EINVAL;
- }
-
- equiv_cpu_table = vmalloc(size);
- if (!equiv_cpu_table) {
- pr_err("failed to allocate equivalent CPU table\n");
- return -ENOMEM;
- }
-
- memcpy(equiv_cpu_table, buf + CONTAINER_HDR_SZ, size);
-
- /* add header length */
- return size + CONTAINER_HDR_SZ;
-}
-
-static void free_equiv_cpu_table(void)
-{
- vfree(equiv_cpu_table);
- equiv_cpu_table = NULL;
-}
-
-static void cleanup(void)
-{
- free_equiv_cpu_table();
- free_cache();
-}
-
-/*
- * We return the current size even if some of the checks failed so that
- * we can skip over the next patch. If we return a negative value, we
- * signal a grave error like a memory allocation has failed and the
- * driver cannot continue functioning normally. In such cases, we tear
- * down everything we've used up so far and exit.
- */
-static int verify_and_add_patch(u8 family, u8 *fw, unsigned int leftover)
-{
- struct microcode_header_amd *mc_hdr;
- struct ucode_patch *patch;
- unsigned int patch_size, crnt_size, ret;
- u32 proc_fam;
- u16 proc_id;
-
- patch_size = *(u32 *)(fw + 4);
- crnt_size = patch_size + SECTION_HDR_SIZE;
- mc_hdr = (struct microcode_header_amd *)(fw + SECTION_HDR_SIZE);
- proc_id = mc_hdr->processor_rev_id;
-
- proc_fam = find_cpu_family_by_equiv_cpu(proc_id);
- if (!proc_fam) {
- pr_err("No patch family for equiv ID: 0x%04x\n", proc_id);
- return crnt_size;
- }
-
- /* check if patch is for the current family */
- proc_fam = ((proc_fam >> 8) & 0xf) + ((proc_fam >> 20) & 0xff);
- if (proc_fam != family)
- return crnt_size;
-
- if (mc_hdr->nb_dev_id || mc_hdr->sb_dev_id) {
- pr_err("Patch-ID 0x%08x: chipset-specific code unsupported.\n",
- mc_hdr->patch_id);
- return crnt_size;
- }
-
- ret = verify_patch_size(family, patch_size, leftover);
- if (!ret) {
- pr_err("Patch-ID 0x%08x: size mismatch.\n", mc_hdr->patch_id);
- return crnt_size;
- }
-
- patch = kzalloc(sizeof(*patch), GFP_KERNEL);
- if (!patch) {
- pr_err("Patch allocation failure.\n");
- return -EINVAL;
- }
-
- patch->data = kzalloc(patch_size, GFP_KERNEL);
- if (!patch->data) {
- pr_err("Patch data allocation failure.\n");
- kfree(patch);
- return -EINVAL;
- }
-
- /* All looks ok, copy patch... */
- memcpy(patch->data, fw + SECTION_HDR_SIZE, patch_size);
- INIT_LIST_HEAD(&patch->plist);
- patch->patch_id = mc_hdr->patch_id;
- patch->equiv_cpu = proc_id;
-
- pr_debug("%s: Added patch_id: 0x%08x, proc_id: 0x%04x\n",
- __func__, patch->patch_id, proc_id);
-
- /* ... and add to cache. */
- update_cache(patch);
-
- return crnt_size;
-}
-
-static enum ucode_state __load_microcode_amd(u8 family, const u8 *data,
- size_t size)
-{
- enum ucode_state ret = UCODE_ERROR;
- unsigned int leftover;
- u8 *fw = (u8 *)data;
- int crnt_size = 0;
- int offset;
-
- offset = install_equiv_cpu_table(data);
- if (offset < 0) {
- pr_err("failed to create equivalent cpu table\n");
- return ret;
- }
- fw += offset;
- leftover = size - offset;
-
- if (*(u32 *)fw != UCODE_UCODE_TYPE) {
- pr_err("invalid type field in container file section header\n");
- free_equiv_cpu_table();
- return ret;
- }
-
- while (leftover) {
- crnt_size = verify_and_add_patch(family, fw, leftover);
- if (crnt_size < 0)
- return ret;
-
- fw += crnt_size;
- leftover -= crnt_size;
- }
-
- return UCODE_OK;
-}
-
-enum ucode_state load_microcode_amd(u8 family, const u8 *data, size_t size)
-{
- enum ucode_state ret;
-
- /* free old equiv table */
- free_equiv_cpu_table();
-
- ret = __load_microcode_amd(family, data, size);
-
- if (ret != UCODE_OK)
- cleanup();
-
-#if defined(CONFIG_MICROCODE_AMD_EARLY) && defined(CONFIG_X86_32)
- /* save BSP's matching patch for early load */
- if (cpu_data(smp_processor_id()).cpu_index == boot_cpu_data.cpu_index) {
- struct ucode_patch *p = find_patch(smp_processor_id());
- if (p) {
- memset(amd_ucode_patch, 0, PATCH_MAX_SIZE);
- memcpy(amd_ucode_patch, p->data, min_t(u32, ksize(p->data),
- PATCH_MAX_SIZE));
- }
- }
-#endif
- return ret;
-}
-
-/*
- * AMD microcode firmware naming convention, up to family 15h they are in
- * the legacy file:
- *
- * amd-ucode/microcode_amd.bin
- *
- * This legacy file is always smaller than 2K in size.
- *
- * Beginning with family 15h, they are in family-specific firmware files:
- *
- * amd-ucode/microcode_amd_fam15h.bin
- * amd-ucode/microcode_amd_fam16h.bin
- * ...
- *
- * These might be larger than 2K.
- */
-static enum ucode_state request_microcode_amd(int cpu, struct device *device,
- bool refresh_fw)
-{
- char fw_name[36] = "amd-ucode/microcode_amd.bin";
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- enum ucode_state ret = UCODE_NFOUND;
- const struct firmware *fw;
-
- /* reload ucode container only on the boot cpu */
- if (!refresh_fw || c->cpu_index != boot_cpu_data.cpu_index)
- return UCODE_OK;
-
- if (c->x86 >= 0x15)
- snprintf(fw_name, sizeof(fw_name), "amd-ucode/microcode_amd_fam%.2xh.bin", c->x86);
-
- if (request_firmware(&fw, (const char *)fw_name, device)) {
- pr_debug("failed to load file %s\n", fw_name);
- goto out;
- }
-
- ret = UCODE_ERROR;
- if (*(u32 *)fw->data != UCODE_MAGIC) {
- pr_err("invalid magic value (0x%08x)\n", *(u32 *)fw->data);
- goto fw_release;
- }
-
- ret = load_microcode_amd(c->x86, fw->data, fw->size);
-
- fw_release:
- release_firmware(fw);
-
- out:
- return ret;
-}
-
-static enum ucode_state
-request_microcode_user(int cpu, const void __user *buf, size_t size)
-{
- return UCODE_ERROR;
-}
-
-static void microcode_fini_cpu_amd(int cpu)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-
- uci->mc = NULL;
-}
-
-static struct microcode_ops microcode_amd_ops = {
- .request_microcode_user = request_microcode_user,
- .request_microcode_fw = request_microcode_amd,
- .collect_cpu_info = collect_cpu_info_amd,
- .apply_microcode = apply_microcode_amd,
- .microcode_fini_cpu = microcode_fini_cpu_amd,
-};
-
-struct microcode_ops * __init init_amd_microcode(void)
-{
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
- pr_warning("AMD CPU family 0x%x not supported\n", c->x86);
- return NULL;
- }
-
- return &microcode_amd_ops;
-}
-
-void __exit exit_amd_microcode(void)
-{
- cleanup();
-}