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Diffstat (limited to 'arch/x86/kernel/microcode_amd_early.c')
-rw-r--r--arch/x86/kernel/microcode_amd_early.c301
1 files changed, 0 insertions, 301 deletions
diff --git a/arch/x86/kernel/microcode_amd_early.c b/arch/x86/kernel/microcode_amd_early.c
deleted file mode 100644
index 6073104ccaa..00000000000
--- a/arch/x86/kernel/microcode_amd_early.c
+++ /dev/null
@@ -1,301 +0,0 @@
-/*
- * Copyright (C) 2013 Advanced Micro Devices, Inc.
- *
- * Author: Jacob Shin <jacob.shin@amd.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/earlycpio.h>
-#include <linux/initrd.h>
-
-#include <asm/cpu.h>
-#include <asm/setup.h>
-#include <asm/microcode_amd.h>
-
-static bool ucode_loaded;
-static u32 ucode_new_rev;
-static unsigned long ucode_offset;
-static size_t ucode_size;
-
-/*
- * Microcode patch container file is prepended to the initrd in cpio format.
- * See Documentation/x86/early-microcode.txt
- */
-static __initdata char ucode_path[] = "kernel/x86/microcode/AuthenticAMD.bin";
-
-static struct cpio_data __init find_ucode_in_initrd(void)
-{
- long offset = 0;
- char *path;
- void *start;
- size_t size;
- unsigned long *uoffset;
- size_t *usize;
- struct cpio_data cd;
-
-#ifdef CONFIG_X86_32
- struct boot_params *p;
-
- /*
- * On 32-bit, early load occurs before paging is turned on so we need
- * to use physical addresses.
- */
- p = (struct boot_params *)__pa_nodebug(&boot_params);
- path = (char *)__pa_nodebug(ucode_path);
- start = (void *)p->hdr.ramdisk_image;
- size = p->hdr.ramdisk_size;
- uoffset = (unsigned long *)__pa_nodebug(&ucode_offset);
- usize = (size_t *)__pa_nodebug(&ucode_size);
-#else
- path = ucode_path;
- start = (void *)(boot_params.hdr.ramdisk_image + PAGE_OFFSET);
- size = boot_params.hdr.ramdisk_size;
- uoffset = &ucode_offset;
- usize = &ucode_size;
-#endif
-
- cd = find_cpio_data(path, start, size, &offset);
- if (!cd.data)
- return cd;
-
- if (*(u32 *)cd.data != UCODE_MAGIC) {
- cd.data = NULL;
- cd.size = 0;
- return cd;
- }
-
- *uoffset = (u8 *)cd.data - (u8 *)start;
- *usize = cd.size;
-
- return cd;
-}
-
-/*
- * Early load occurs before we can vmalloc(). So we look for the microcode
- * patch container file in initrd, traverse equivalent cpu table, look for a
- * matching microcode patch, and update, all in initrd memory in place.
- * When vmalloc() is available for use later -- on 64-bit during first AP load,
- * and on 32-bit during save_microcode_in_initrd_amd() -- we can call
- * load_microcode_amd() to save equivalent cpu table and microcode patches in
- * kernel heap memory.
- */
-static void apply_ucode_in_initrd(void *ucode, size_t size)
-{
- struct equiv_cpu_entry *eq;
- u32 *header;
- u8 *data;
- u16 eq_id = 0;
- int offset, left;
- u32 rev, eax;
- u32 *new_rev;
- unsigned long *uoffset;
- size_t *usize;
-
-#ifdef CONFIG_X86_32
- new_rev = (u32 *)__pa_nodebug(&ucode_new_rev);
- uoffset = (unsigned long *)__pa_nodebug(&ucode_offset);
- usize = (size_t *)__pa_nodebug(&ucode_size);
-#else
- new_rev = &ucode_new_rev;
- uoffset = &ucode_offset;
- usize = &ucode_size;
-#endif
-
- data = ucode;
- left = size;
- header = (u32 *)data;
-
- /* find equiv cpu table */
-
- if (header[1] != UCODE_EQUIV_CPU_TABLE_TYPE || /* type */
- header[2] == 0) /* size */
- return;
-
- eax = cpuid_eax(0x00000001);
-
- while (left > 0) {
- eq = (struct equiv_cpu_entry *)(data + CONTAINER_HDR_SZ);
-
- offset = header[2] + CONTAINER_HDR_SZ;
- data += offset;
- left -= offset;
-
- eq_id = find_equiv_id(eq, eax);
- if (eq_id)
- break;
-
- /*
- * support multiple container files appended together. if this
- * one does not have a matching equivalent cpu entry, we fast
- * forward to the next container file.
- */
- while (left > 0) {
- header = (u32 *)data;
- if (header[0] == UCODE_MAGIC &&
- header[1] == UCODE_EQUIV_CPU_TABLE_TYPE)
- break;
-
- offset = header[1] + SECTION_HDR_SIZE;
- data += offset;
- left -= offset;
- }
-
- /* mark where the next microcode container file starts */
- offset = data - (u8 *)ucode;
- *uoffset += offset;
- *usize -= offset;
- ucode = data;
- }
-
- if (!eq_id) {
- *usize = 0;
- return;
- }
-
- /* find ucode and update if needed */
-
- rdmsr(MSR_AMD64_PATCH_LEVEL, rev, eax);
-
- while (left > 0) {
- struct microcode_amd *mc;
-
- header = (u32 *)data;
- if (header[0] != UCODE_UCODE_TYPE || /* type */
- header[1] == 0) /* size */
- break;
-
- mc = (struct microcode_amd *)(data + SECTION_HDR_SIZE);
- if (eq_id == mc->hdr.processor_rev_id && rev < mc->hdr.patch_id)
- if (__apply_microcode_amd(mc) == 0) {
- rev = mc->hdr.patch_id;
- *new_rev = rev;
- }
-
- offset = header[1] + SECTION_HDR_SIZE;
- data += offset;
- left -= offset;
- }
-
- /* mark where this microcode container file ends */
- offset = *usize - (data - (u8 *)ucode);
- *usize -= offset;
-
- if (!(*new_rev))
- *usize = 0;
-}
-
-void __init load_ucode_amd_bsp(void)
-{
- struct cpio_data cd = find_ucode_in_initrd();
- if (!cd.data)
- return;
-
- apply_ucode_in_initrd(cd.data, cd.size);
-}
-
-#ifdef CONFIG_X86_32
-u8 amd_bsp_mpb[MPB_MAX_SIZE];
-
-/*
- * On 32-bit, since AP's early load occurs before paging is turned on, we
- * cannot traverse cpu_equiv_table and pcache in kernel heap memory. So during
- * cold boot, AP will apply_ucode_in_initrd() just like the BSP. During
- * save_microcode_in_initrd_amd() BSP's patch is copied to amd_bsp_mpb, which
- * is used upon resume from suspend.
- */
-void load_ucode_amd_ap(void)
-{
- struct microcode_amd *mc;
- unsigned long *initrd;
- unsigned long *uoffset;
- size_t *usize;
- void *ucode;
-
- mc = (struct microcode_amd *)__pa(amd_bsp_mpb);
- if (mc->hdr.patch_id && mc->hdr.processor_rev_id) {
- __apply_microcode_amd(mc);
- return;
- }
-
- initrd = (unsigned long *)__pa(&initrd_start);
- uoffset = (unsigned long *)__pa(&ucode_offset);
- usize = (size_t *)__pa(&ucode_size);
-
- if (!*usize || !*initrd)
- return;
-
- ucode = (void *)((unsigned long)__pa(*initrd) + *uoffset);
- apply_ucode_in_initrd(ucode, *usize);
-}
-
-static void __init collect_cpu_sig_on_bsp(void *arg)
-{
- unsigned int cpu = smp_processor_id();
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- uci->cpu_sig.sig = cpuid_eax(0x00000001);
-}
-#else
-void load_ucode_amd_ap(void)
-{
- unsigned int cpu = smp_processor_id();
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- u32 rev, eax;
-
- rdmsr(MSR_AMD64_PATCH_LEVEL, rev, eax);
- eax = cpuid_eax(0x00000001);
-
- uci->cpu_sig.rev = rev;
- uci->cpu_sig.sig = eax;
-
- if (cpu && !ucode_loaded) {
- void *ucode;
-
- if (!ucode_size || !initrd_start)
- return;
-
- ucode = (void *)(initrd_start + ucode_offset);
- eax = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff);
- if (load_microcode_amd(eax, ucode, ucode_size) != UCODE_OK)
- return;
-
- ucode_loaded = true;
- }
-
- apply_microcode_amd(cpu);
-}
-#endif
-
-int __init save_microcode_in_initrd_amd(void)
-{
- enum ucode_state ret;
- void *ucode;
- u32 eax;
-
-#ifdef CONFIG_X86_32
- unsigned int bsp = boot_cpu_data.cpu_index;
- struct ucode_cpu_info *uci = ucode_cpu_info + bsp;
-
- if (!uci->cpu_sig.sig)
- smp_call_function_single(bsp, collect_cpu_sig_on_bsp, NULL, 1);
-#endif
- if (ucode_new_rev)
- pr_info("microcode: updated early to new patch_level=0x%08x\n",
- ucode_new_rev);
-
- if (ucode_loaded || !ucode_size || !initrd_start)
- return 0;
-
- ucode = (void *)(initrd_start + ucode_offset);
- eax = cpuid_eax(0x00000001);
- eax = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff);
-
- ret = load_microcode_amd(eax, ucode, ucode_size);
- if (ret != UCODE_OK)
- return -EINVAL;
-
- ucode_loaded = true;
- return 0;
-}
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