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Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/microcode_amd.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/kernel/microcode_amd.c395
1 files changed, 0 insertions, 395 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/microcode_amd.c b/ANDROID_3.4.5/arch/x86/kernel/microcode_amd.c
deleted file mode 100644
index 8a2ce8fd..00000000
--- a/ANDROID_3.4.5/arch/x86/kernel/microcode_amd.c
+++ /dev/null
@@ -1,395 +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 <andreas.herrmann3@amd.com>
- * Borislav Petkov <borislav.petkov@amd.com>
- *
- * 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>
-
-MODULE_DESCRIPTION("AMD Microcode Update Driver");
-MODULE_AUTHOR("Peter Oruba");
-MODULE_LICENSE("GPL v2");
-
-#define UCODE_MAGIC 0x00414d44
-#define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000
-#define UCODE_UCODE_TYPE 0x00000001
-
-struct equiv_cpu_entry {
- u32 installed_cpu;
- u32 fixed_errata_mask;
- u32 fixed_errata_compare;
- u16 equiv_cpu;
- u16 res;
-} __attribute__((packed));
-
-struct microcode_header_amd {
- u32 data_code;
- u32 patch_id;
- u16 mc_patch_data_id;
- u8 mc_patch_data_len;
- u8 init_flag;
- u32 mc_patch_data_checksum;
- u32 nb_dev_id;
- u32 sb_dev_id;
- u16 processor_rev_id;
- u8 nb_rev_id;
- u8 sb_rev_id;
- u8 bios_api_rev;
- u8 reserved1[3];
- u32 match_reg[8];
-} __attribute__((packed));
-
-struct microcode_amd {
- struct microcode_header_amd hdr;
- unsigned int mpb[0];
-};
-
-#define SECTION_HDR_SIZE 8
-#define CONTAINER_HDR_SZ 12
-
-static struct equiv_cpu_entry *equiv_cpu_table;
-
-/* page-sized ucode patch buffer */
-void *patch;
-
-static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
-{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
-
- csig->rev = c->microcode;
- pr_info("CPU%d: patch_level=0x%08x\n", cpu, csig->rev);
-
- return 0;
-}
-
-static unsigned int verify_ucode_size(int cpu, u32 patch_size,
- unsigned int size)
-{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- u32 max_size;
-
-#define F1XH_MPB_MAX_SIZE 2048
-#define F14H_MPB_MAX_SIZE 1824
-#define F15H_MPB_MAX_SIZE 4096
-
- switch (c->x86) {
- case 0x14:
- max_size = F14H_MPB_MAX_SIZE;
- break;
- case 0x15:
- max_size = F15H_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;
-}
-
-static u16 find_equiv_id(void)
-{
- unsigned int current_cpu_id, i = 0;
-
- BUG_ON(equiv_cpu_table == NULL);
-
- current_cpu_id = cpuid_eax(0x00000001);
-
- while (equiv_cpu_table[i].installed_cpu != 0) {
- if (current_cpu_id == equiv_cpu_table[i].installed_cpu)
- return equiv_cpu_table[i].equiv_cpu;
-
- i++;
- }
- return 0;
-}
-
-/*
- * we signal a good patch is found by returning its size > 0
- */
-static int get_matching_microcode(int cpu, const u8 *ucode_ptr,
- unsigned int leftover_size, int rev,
- unsigned int *current_size)
-{
- struct microcode_header_amd *mc_hdr;
- unsigned int actual_size;
- u16 equiv_cpu_id;
-
- /* size of the current patch we're staring at */
- *current_size = *(u32 *)(ucode_ptr + 4) + SECTION_HDR_SIZE;
-
- equiv_cpu_id = find_equiv_id();
- if (!equiv_cpu_id)
- return 0;
-
- /*
- * let's look at the patch header itself now
- */
- mc_hdr = (struct microcode_header_amd *)(ucode_ptr + SECTION_HDR_SIZE);
-
- if (mc_hdr->processor_rev_id != equiv_cpu_id)
- return 0;
-
- /* ucode might be chipset specific -- currently we don't support this */
- if (mc_hdr->nb_dev_id || mc_hdr->sb_dev_id) {
- pr_err("CPU%d: chipset specific code not yet supported\n",
- cpu);
- return 0;
- }
-
- if (mc_hdr->patch_id <= rev)
- return 0;
-
- /*
- * now that the header looks sane, verify its size
- */
- actual_size = verify_ucode_size(cpu, *current_size, leftover_size);
- if (!actual_size)
- return 0;
-
- /* clear the patch buffer */
- memset(patch, 0, PAGE_SIZE);
-
- /* all looks ok, get the binary patch */
- get_ucode_data(patch, ucode_ptr + SECTION_HDR_SIZE, actual_size);
-
- return actual_size;
-}
-
-static int apply_microcode_amd(int cpu)
-{
- u32 rev, dummy;
- int cpu_num = raw_smp_processor_id();
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
- struct microcode_amd *mc_amd = uci->mc;
- struct cpuinfo_x86 *c = &cpu_data(cpu);
-
- /* We should bind the task to the CPU */
- BUG_ON(cpu_num != cpu);
-
- if (mc_amd == NULL)
- return 0;
-
- wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
- /* get patch id after patching */
- rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
-
- /* check current patch id and patch's id for match */
- if (rev != mc_amd->hdr.patch_id) {
- 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, rev);
- uci->cpu_sig.rev = rev;
- c->microcode = rev;
-
- 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;
- }
-
- get_ucode_data(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 enum ucode_state
-generic_load_microcode(int cpu, const u8 *data, size_t size)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- struct microcode_header_amd *mc_hdr = NULL;
- unsigned int mc_size, leftover, current_size = 0;
- int offset;
- const u8 *ucode_ptr = data;
- void *new_mc = NULL;
- unsigned int new_rev = uci->cpu_sig.rev;
- enum ucode_state state = UCODE_ERROR;
-
- offset = install_equiv_cpu_table(ucode_ptr);
- if (offset < 0) {
- pr_err("failed to create equivalent cpu table\n");
- goto out;
- }
- ucode_ptr += offset;
- leftover = size - offset;
-
- if (*(u32 *)ucode_ptr != UCODE_UCODE_TYPE) {
- pr_err("invalid type field in container file section header\n");
- goto free_table;
- }
-
- while (leftover) {
- mc_size = get_matching_microcode(cpu, ucode_ptr, leftover,
- new_rev, &current_size);
- if (mc_size) {
- mc_hdr = patch;
- new_mc = patch;
- new_rev = mc_hdr->patch_id;
- goto out_ok;
- }
-
- ucode_ptr += current_size;
- leftover -= current_size;
- }
-
- if (!new_mc) {
- state = UCODE_NFOUND;
- goto free_table;
- }
-
-out_ok:
- uci->mc = new_mc;
- state = UCODE_OK;
- pr_debug("CPU%d update ucode (0x%08x -> 0x%08x)\n",
- cpu, uci->cpu_sig.rev, new_rev);
-
-free_table:
- free_equiv_cpu_table();
-
-out:
- return state;
-}
-
-/*
- * 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.
- *
- * Starting at 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)
-{
- char fw_name[36] = "amd-ucode/microcode_amd.bin";
- const struct firmware *fw;
- enum ucode_state ret = UCODE_NFOUND;
- struct cpuinfo_x86 *c = &cpu_data(cpu);
-
- 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_err("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 = generic_load_microcode(cpu, 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;
- }
-
- patch = (void *)get_zeroed_page(GFP_KERNEL);
- if (!patch)
- return NULL;
-
- return &microcode_amd_ops;
-}
-
-void __exit exit_amd_microcode(void)
-{
- free_page((unsigned long)patch);
-}
generated by cgit (git 2.34.1) at 2025-01-11 04:52:12 +0000