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961 lines
22 KiB
961 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
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* AMD CPU Microcode Update Driver for Linux |
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* |
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* This driver allows to upgrade microcode on F10h AMD |
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* CPUs and later. |
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* |
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* Copyright (C) 2008-2011 Advanced Micro Devices Inc. |
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* 2013-2018 Borislav Petkov <[email protected]> |
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* |
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* Author: Peter Oruba <[email protected]> |
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* |
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* Based on work by: |
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* Tigran Aivazian <[email protected]> |
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* |
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* early loader: |
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* Copyright (C) 2013 Advanced Micro Devices, Inc. |
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* |
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* Author: Jacob Shin <[email protected]> |
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* Fixes: Borislav Petkov <[email protected]> |
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*/ |
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#define pr_fmt(fmt) "microcode: " fmt |
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|
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#include <linux/earlycpio.h> |
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#include <linux/firmware.h> |
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#include <linux/uaccess.h> |
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#include <linux/vmalloc.h> |
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#include <linux/initrd.h> |
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#include <linux/kernel.h> |
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#include <linux/pci.h> |
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|
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#include <asm/microcode_amd.h> |
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#include <asm/microcode.h> |
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#include <asm/processor.h> |
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#include <asm/setup.h> |
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#include <asm/cpu.h> |
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#include <asm/msr.h> |
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|
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static struct equiv_cpu_table { |
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unsigned int num_entries; |
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struct equiv_cpu_entry *entry; |
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} equiv_table; |
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|
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/* |
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* This points to the current valid container of microcode patches which we will |
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* save from the initrd/builtin before jettisoning its contents. @mc is the |
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* microcode patch we found to match. |
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*/ |
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struct cont_desc { |
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struct microcode_amd *mc; |
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u32 cpuid_1_eax; |
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u32 psize; |
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u8 *data; |
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size_t size; |
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}; |
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|
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static u32 ucode_new_rev; |
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static u8 amd_ucode_patch[PATCH_MAX_SIZE]; |
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|
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/* |
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* Microcode patch container file is prepended to the initrd in cpio |
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* format. See Documentation/x86/microcode.rst |
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*/ |
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static const char |
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ucode_path[] __maybe_unused = "kernel/x86/microcode/AuthenticAMD.bin"; |
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|
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static u16 find_equiv_id(struct equiv_cpu_table *et, u32 sig) |
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{ |
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unsigned int i; |
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|
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if (!et || !et->num_entries) |
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return 0; |
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|
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for (i = 0; i < et->num_entries; i++) { |
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struct equiv_cpu_entry *e = &et->entry[i]; |
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|
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if (sig == e->installed_cpu) |
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return e->equiv_cpu; |
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|
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e++; |
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} |
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return 0; |
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} |
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|
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/* |
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* Check whether there is a valid microcode container file at the beginning |
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* of @buf of size @buf_size. Set @early to use this function in the early path. |
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*/ |
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static bool verify_container(const u8 *buf, size_t buf_size, bool early) |
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{ |
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u32 cont_magic; |
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|
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if (buf_size <= CONTAINER_HDR_SZ) { |
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if (!early) |
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pr_debug("Truncated microcode container header.\n"); |
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|
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return false; |
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} |
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|
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cont_magic = *(const u32 *)buf; |
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if (cont_magic != UCODE_MAGIC) { |
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if (!early) |
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pr_debug("Invalid magic value (0x%08x).\n", cont_magic); |
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|
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return false; |
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} |
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|
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return true; |
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} |
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|
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/* |
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* Check whether there is a valid, non-truncated CPU equivalence table at the |
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* beginning of @buf of size @buf_size. Set @early to use this function in the |
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* early path. |
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*/ |
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static bool verify_equivalence_table(const u8 *buf, size_t buf_size, bool early) |
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{ |
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const u32 *hdr = (const u32 *)buf; |
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u32 cont_type, equiv_tbl_len; |
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|
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if (!verify_container(buf, buf_size, early)) |
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return false; |
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|
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cont_type = hdr[1]; |
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if (cont_type != UCODE_EQUIV_CPU_TABLE_TYPE) { |
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if (!early) |
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pr_debug("Wrong microcode container equivalence table type: %u.\n", |
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cont_type); |
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|
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return false; |
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} |
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|
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buf_size -= CONTAINER_HDR_SZ; |
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|
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equiv_tbl_len = hdr[2]; |
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if (equiv_tbl_len < sizeof(struct equiv_cpu_entry) || |
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buf_size < equiv_tbl_len) { |
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if (!early) |
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pr_debug("Truncated equivalence table.\n"); |
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|
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return false; |
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} |
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|
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return true; |
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} |
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|
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/* |
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* Check whether there is a valid, non-truncated microcode patch section at the |
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* beginning of @buf of size @buf_size. Set @early to use this function in the |
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* early path. |
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* |
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* On success, @sh_psize returns the patch size according to the section header, |
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* to the caller. |
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*/ |
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static bool |
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__verify_patch_section(const u8 *buf, size_t buf_size, u32 *sh_psize, bool early) |
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{ |
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u32 p_type, p_size; |
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const u32 *hdr; |
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|
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if (buf_size < SECTION_HDR_SIZE) { |
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if (!early) |
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pr_debug("Truncated patch section.\n"); |
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|
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return false; |
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} |
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|
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hdr = (const u32 *)buf; |
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p_type = hdr[0]; |
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p_size = hdr[1]; |
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|
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if (p_type != UCODE_UCODE_TYPE) { |
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if (!early) |
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pr_debug("Invalid type field (0x%x) in container file section header.\n", |
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p_type); |
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|
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return false; |
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} |
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|
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if (p_size < sizeof(struct microcode_header_amd)) { |
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if (!early) |
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pr_debug("Patch of size %u too short.\n", p_size); |
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|
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return false; |
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} |
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|
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*sh_psize = p_size; |
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|
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return true; |
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} |
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|
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/* |
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* Check whether the passed remaining file @buf_size is large enough to contain |
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* a patch of the indicated @sh_psize (and also whether this size does not |
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* exceed the per-family maximum). @sh_psize is the size read from the section |
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* header. |
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*/ |
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static unsigned int __verify_patch_size(u8 family, u32 sh_psize, size_t buf_size) |
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{ |
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u32 max_size; |
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|
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if (family >= 0x15) |
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return min_t(u32, sh_psize, buf_size); |
|
|
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#define F1XH_MPB_MAX_SIZE 2048 |
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#define F14H_MPB_MAX_SIZE 1824 |
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|
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switch (family) { |
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case 0x10 ... 0x12: |
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max_size = F1XH_MPB_MAX_SIZE; |
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break; |
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case 0x14: |
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max_size = F14H_MPB_MAX_SIZE; |
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break; |
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default: |
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WARN(1, "%s: WTF family: 0x%x\n", __func__, family); |
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return 0; |
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} |
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|
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if (sh_psize > min_t(u32, buf_size, max_size)) |
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return 0; |
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|
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return sh_psize; |
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} |
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|
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/* |
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* Verify the patch in @buf. |
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* |
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* Returns: |
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* negative: on error |
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* positive: patch is not for this family, skip it |
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* 0: success |
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*/ |
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static int |
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verify_patch(u8 family, const u8 *buf, size_t buf_size, u32 *patch_size, bool early) |
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{ |
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struct microcode_header_amd *mc_hdr; |
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unsigned int ret; |
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u32 sh_psize; |
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u16 proc_id; |
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u8 patch_fam; |
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|
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if (!__verify_patch_section(buf, buf_size, &sh_psize, early)) |
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return -1; |
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|
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/* |
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* The section header length is not included in this indicated size |
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* but is present in the leftover file length so we need to subtract |
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* it before passing this value to the function below. |
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*/ |
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buf_size -= SECTION_HDR_SIZE; |
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|
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/* |
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* Check if the remaining buffer is big enough to contain a patch of |
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* size sh_psize, as the section claims. |
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*/ |
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if (buf_size < sh_psize) { |
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if (!early) |
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pr_debug("Patch of size %u truncated.\n", sh_psize); |
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|
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return -1; |
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} |
|
|
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ret = __verify_patch_size(family, sh_psize, buf_size); |
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if (!ret) { |
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if (!early) |
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pr_debug("Per-family patch size mismatch.\n"); |
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return -1; |
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} |
|
|
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*patch_size = sh_psize; |
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|
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mc_hdr = (struct microcode_header_amd *)(buf + SECTION_HDR_SIZE); |
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if (mc_hdr->nb_dev_id || mc_hdr->sb_dev_id) { |
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if (!early) |
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pr_err("Patch-ID 0x%08x: chipset-specific code unsupported.\n", mc_hdr->patch_id); |
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return -1; |
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} |
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|
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proc_id = mc_hdr->processor_rev_id; |
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patch_fam = 0xf + (proc_id >> 12); |
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if (patch_fam != family) |
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return 1; |
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|
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return 0; |
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} |
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|
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/* |
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* This scans the ucode blob for the proper container as we can have multiple |
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* containers glued together. Returns the equivalence ID from the equivalence |
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* table or 0 if none found. |
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* Returns the amount of bytes consumed while scanning. @desc contains all the |
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* data we're going to use in later stages of the application. |
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*/ |
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static size_t parse_container(u8 *ucode, size_t size, struct cont_desc *desc) |
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{ |
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struct equiv_cpu_table table; |
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size_t orig_size = size; |
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u32 *hdr = (u32 *)ucode; |
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u16 eq_id; |
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u8 *buf; |
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|
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if (!verify_equivalence_table(ucode, size, true)) |
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return 0; |
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|
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buf = ucode; |
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|
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table.entry = (struct equiv_cpu_entry *)(buf + CONTAINER_HDR_SZ); |
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table.num_entries = hdr[2] / sizeof(struct equiv_cpu_entry); |
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|
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/* |
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* Find the equivalence ID of our CPU in this table. Even if this table |
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* doesn't contain a patch for the CPU, scan through the whole container |
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* so that it can be skipped in case there are other containers appended. |
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*/ |
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eq_id = find_equiv_id(&table, desc->cpuid_1_eax); |
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|
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buf += hdr[2] + CONTAINER_HDR_SZ; |
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size -= hdr[2] + CONTAINER_HDR_SZ; |
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|
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/* |
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* Scan through the rest of the container to find where it ends. We do |
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* some basic sanity-checking too. |
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*/ |
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while (size > 0) { |
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struct microcode_amd *mc; |
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u32 patch_size; |
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int ret; |
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|
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ret = verify_patch(x86_family(desc->cpuid_1_eax), buf, size, &patch_size, true); |
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if (ret < 0) { |
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/* |
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* Patch verification failed, skip to the next |
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* container, if there's one: |
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*/ |
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goto out; |
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} else if (ret > 0) { |
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goto skip; |
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} |
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mc = (struct microcode_amd *)(buf + SECTION_HDR_SIZE); |
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if (eq_id == mc->hdr.processor_rev_id) { |
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desc->psize = patch_size; |
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desc->mc = mc; |
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} |
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skip: |
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/* Skip patch section header too: */ |
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buf += patch_size + SECTION_HDR_SIZE; |
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size -= patch_size + SECTION_HDR_SIZE; |
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} |
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|
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/* |
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* If we have found a patch (desc->mc), it means we're looking at the |
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* container which has a patch for this CPU so return 0 to mean, @ucode |
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* already points to the proper container. Otherwise, we return the size |
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* we scanned so that we can advance to the next container in the |
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* buffer. |
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*/ |
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if (desc->mc) { |
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desc->data = ucode; |
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desc->size = orig_size - size; |
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|
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return 0; |
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} |
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out: |
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return orig_size - size; |
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} |
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|
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/* |
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* Scan the ucode blob for the proper container as we can have multiple |
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* containers glued together. |
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*/ |
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static void scan_containers(u8 *ucode, size_t size, struct cont_desc *desc) |
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{ |
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while (size) { |
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size_t s = parse_container(ucode, size, desc); |
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if (!s) |
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return; |
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|
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/* catch wraparound */ |
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if (size >= s) { |
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ucode += s; |
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size -= s; |
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} else { |
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return; |
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} |
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} |
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} |
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|
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static int __apply_microcode_amd(struct microcode_amd *mc) |
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{ |
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u32 rev, dummy; |
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|
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native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc->hdr.data_code); |
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|
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/* verify patch application was successful */ |
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native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy); |
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if (rev != mc->hdr.patch_id) |
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return -1; |
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|
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return 0; |
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} |
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|
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/* |
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* Early load occurs before we can vmalloc(). So we look for the microcode |
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* patch container file in initrd, traverse equivalent cpu table, look for a |
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* matching microcode patch, and update, all in initrd memory in place. |
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* When vmalloc() is available for use later -- on 64-bit during first AP load, |
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* and on 32-bit during save_microcode_in_initrd_amd() -- we can call |
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* load_microcode_amd() to save equivalent cpu table and microcode patches in |
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* kernel heap memory. |
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* |
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* Returns true if container found (sets @desc), false otherwise. |
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*/ |
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static bool |
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apply_microcode_early_amd(u32 cpuid_1_eax, void *ucode, size_t size, bool save_patch) |
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{ |
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struct cont_desc desc = { 0 }; |
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u8 (*patch)[PATCH_MAX_SIZE]; |
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struct microcode_amd *mc; |
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u32 rev, dummy, *new_rev; |
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bool ret = false; |
|
|
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#ifdef CONFIG_X86_32 |
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new_rev = (u32 *)__pa_nodebug(&ucode_new_rev); |
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patch = (u8 (*)[PATCH_MAX_SIZE])__pa_nodebug(&amd_ucode_patch); |
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#else |
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new_rev = &ucode_new_rev; |
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patch = &amd_ucode_patch; |
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#endif |
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|
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desc.cpuid_1_eax = cpuid_1_eax; |
|
|
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scan_containers(ucode, size, &desc); |
|
|
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mc = desc.mc; |
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if (!mc) |
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return ret; |
|
|
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native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy); |
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if (rev >= mc->hdr.patch_id) |
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return ret; |
|
|
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if (!__apply_microcode_amd(mc)) { |
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*new_rev = mc->hdr.patch_id; |
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ret = true; |
|
|
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if (save_patch) |
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memcpy(patch, mc, min_t(u32, desc.psize, PATCH_MAX_SIZE)); |
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} |
|
|
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return ret; |
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} |
|
|
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static bool get_builtin_microcode(struct cpio_data *cp, unsigned int family) |
|
{ |
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#ifdef CONFIG_X86_64 |
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char fw_name[36] = "amd-ucode/microcode_amd.bin"; |
|
|
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if (family >= 0x15) |
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snprintf(fw_name, sizeof(fw_name), |
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"amd-ucode/microcode_amd_fam%.2xh.bin", family); |
|
|
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return get_builtin_firmware(cp, fw_name); |
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#else |
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return false; |
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#endif |
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} |
|
|
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static void __load_ucode_amd(unsigned int cpuid_1_eax, struct cpio_data *ret) |
|
{ |
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struct ucode_cpu_info *uci; |
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struct cpio_data cp; |
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const char *path; |
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bool use_pa; |
|
|
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if (IS_ENABLED(CONFIG_X86_32)) { |
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uci = (struct ucode_cpu_info *)__pa_nodebug(ucode_cpu_info); |
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path = (const char *)__pa_nodebug(ucode_path); |
|
use_pa = true; |
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} else { |
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uci = ucode_cpu_info; |
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path = ucode_path; |
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use_pa = false; |
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} |
|
|
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if (!get_builtin_microcode(&cp, x86_family(cpuid_1_eax))) |
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cp = find_microcode_in_initrd(path, use_pa); |
|
|
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/* Needed in load_microcode_amd() */ |
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uci->cpu_sig.sig = cpuid_1_eax; |
|
|
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*ret = cp; |
|
} |
|
|
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void __init load_ucode_amd_bsp(unsigned int cpuid_1_eax) |
|
{ |
|
struct cpio_data cp = { }; |
|
|
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__load_ucode_amd(cpuid_1_eax, &cp); |
|
if (!(cp.data && cp.size)) |
|
return; |
|
|
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apply_microcode_early_amd(cpuid_1_eax, cp.data, cp.size, true); |
|
} |
|
|
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void load_ucode_amd_ap(unsigned int cpuid_1_eax) |
|
{ |
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struct microcode_amd *mc; |
|
struct cpio_data cp; |
|
u32 *new_rev, rev, dummy; |
|
|
|
if (IS_ENABLED(CONFIG_X86_32)) { |
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mc = (struct microcode_amd *)__pa_nodebug(amd_ucode_patch); |
|
new_rev = (u32 *)__pa_nodebug(&ucode_new_rev); |
|
} else { |
|
mc = (struct microcode_amd *)amd_ucode_patch; |
|
new_rev = &ucode_new_rev; |
|
} |
|
|
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native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy); |
|
|
|
/* Check whether we have saved a new patch already: */ |
|
if (*new_rev && rev < mc->hdr.patch_id) { |
|
if (!__apply_microcode_amd(mc)) { |
|
*new_rev = mc->hdr.patch_id; |
|
return; |
|
} |
|
} |
|
|
|
__load_ucode_amd(cpuid_1_eax, &cp); |
|
if (!(cp.data && cp.size)) |
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return; |
|
|
|
apply_microcode_early_amd(cpuid_1_eax, cp.data, cp.size, false); |
|
} |
|
|
|
static enum ucode_state |
|
load_microcode_amd(bool save, u8 family, const u8 *data, size_t size); |
|
|
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int __init save_microcode_in_initrd_amd(unsigned int cpuid_1_eax) |
|
{ |
|
struct cont_desc desc = { 0 }; |
|
enum ucode_state ret; |
|
struct cpio_data cp; |
|
|
|
cp = find_microcode_in_initrd(ucode_path, false); |
|
if (!(cp.data && cp.size)) |
|
return -EINVAL; |
|
|
|
desc.cpuid_1_eax = cpuid_1_eax; |
|
|
|
scan_containers(cp.data, cp.size, &desc); |
|
if (!desc.mc) |
|
return -EINVAL; |
|
|
|
ret = load_microcode_amd(true, x86_family(cpuid_1_eax), desc.data, desc.size); |
|
if (ret > UCODE_UPDATED) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
void reload_ucode_amd(void) |
|
{ |
|
struct microcode_amd *mc; |
|
u32 rev, dummy __always_unused; |
|
|
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mc = (struct microcode_amd *)amd_ucode_patch; |
|
|
|
rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy); |
|
|
|
if (rev < mc->hdr.patch_id) { |
|
if (!__apply_microcode_amd(mc)) { |
|
ucode_new_rev = mc->hdr.patch_id; |
|
pr_info("reload patch_level=0x%08x\n", ucode_new_rev); |
|
} |
|
} |
|
} |
|
static u16 __find_equiv_id(unsigned int cpu) |
|
{ |
|
struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
|
return find_equiv_id(&equiv_table, uci->cpu_sig.sig); |
|
} |
|
|
|
/* |
|
* 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, µcode_cache, 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, µcode_cache, plist) { |
|
if (p->equiv_cpu == new_patch->equiv_cpu) { |
|
if (p->patch_id >= new_patch->patch_id) { |
|
/* we already have the latest patch */ |
|
kfree(new_patch->data); |
|
kfree(new_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, µcode_cache); |
|
} |
|
|
|
static void free_cache(void) |
|
{ |
|
struct ucode_patch *p, *tmp; |
|
|
|
list_for_each_entry_safe(p, tmp, µcode_cache, 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 enum ucode_state 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; |
|
enum ucode_state ret; |
|
u32 rev, dummy __always_unused; |
|
|
|
BUG_ON(raw_smp_processor_id() != cpu); |
|
|
|
uci = ucode_cpu_info + cpu; |
|
|
|
p = find_patch(cpu); |
|
if (!p) |
|
return UCODE_NFOUND; |
|
|
|
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) { |
|
ret = UCODE_OK; |
|
goto out; |
|
} |
|
|
|
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 UCODE_ERROR; |
|
} |
|
|
|
rev = mc_amd->hdr.patch_id; |
|
ret = UCODE_UPDATED; |
|
|
|
pr_info("CPU%d: new patch_level=0x%08x\n", cpu, rev); |
|
|
|
out: |
|
uci->cpu_sig.rev = rev; |
|
c->microcode = rev; |
|
|
|
/* Update boot_cpu_data's revision too, if we're on the BSP: */ |
|
if (c->cpu_index == boot_cpu_data.cpu_index) |
|
boot_cpu_data.microcode = rev; |
|
|
|
return ret; |
|
} |
|
|
|
static size_t install_equiv_cpu_table(const u8 *buf, size_t buf_size) |
|
{ |
|
u32 equiv_tbl_len; |
|
const u32 *hdr; |
|
|
|
if (!verify_equivalence_table(buf, buf_size, false)) |
|
return 0; |
|
|
|
hdr = (const u32 *)buf; |
|
equiv_tbl_len = hdr[2]; |
|
|
|
equiv_table.entry = vmalloc(equiv_tbl_len); |
|
if (!equiv_table.entry) { |
|
pr_err("failed to allocate equivalent CPU table\n"); |
|
return 0; |
|
} |
|
|
|
memcpy(equiv_table.entry, buf + CONTAINER_HDR_SZ, equiv_tbl_len); |
|
equiv_table.num_entries = equiv_tbl_len / sizeof(struct equiv_cpu_entry); |
|
|
|
/* add header length */ |
|
return equiv_tbl_len + CONTAINER_HDR_SZ; |
|
} |
|
|
|
static void free_equiv_cpu_table(void) |
|
{ |
|
vfree(equiv_table.entry); |
|
memset(&equiv_table, 0, sizeof(equiv_table)); |
|
} |
|
|
|
static void cleanup(void) |
|
{ |
|
free_equiv_cpu_table(); |
|
free_cache(); |
|
} |
|
|
|
/* |
|
* Return a non-negative value 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, |
|
unsigned int *patch_size) |
|
{ |
|
struct microcode_header_amd *mc_hdr; |
|
struct ucode_patch *patch; |
|
u16 proc_id; |
|
int ret; |
|
|
|
ret = verify_patch(family, fw, leftover, patch_size, false); |
|
if (ret) |
|
return ret; |
|
|
|
patch = kzalloc(sizeof(*patch), GFP_KERNEL); |
|
if (!patch) { |
|
pr_err("Patch allocation failure.\n"); |
|
return -EINVAL; |
|
} |
|
|
|
patch->data = kmemdup(fw + SECTION_HDR_SIZE, *patch_size, GFP_KERNEL); |
|
if (!patch->data) { |
|
pr_err("Patch data allocation failure.\n"); |
|
kfree(patch); |
|
return -EINVAL; |
|
} |
|
|
|
mc_hdr = (struct microcode_header_amd *)(fw + SECTION_HDR_SIZE); |
|
proc_id = mc_hdr->processor_rev_id; |
|
|
|
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 0; |
|
} |
|
|
|
static enum ucode_state __load_microcode_amd(u8 family, const u8 *data, |
|
size_t size) |
|
{ |
|
u8 *fw = (u8 *)data; |
|
size_t offset; |
|
|
|
offset = install_equiv_cpu_table(data, size); |
|
if (!offset) |
|
return UCODE_ERROR; |
|
|
|
fw += offset; |
|
size -= offset; |
|
|
|
if (*(u32 *)fw != UCODE_UCODE_TYPE) { |
|
pr_err("invalid type field in container file section header\n"); |
|
free_equiv_cpu_table(); |
|
return UCODE_ERROR; |
|
} |
|
|
|
while (size > 0) { |
|
unsigned int crnt_size = 0; |
|
int ret; |
|
|
|
ret = verify_and_add_patch(family, fw, size, &crnt_size); |
|
if (ret < 0) |
|
return UCODE_ERROR; |
|
|
|
fw += crnt_size + SECTION_HDR_SIZE; |
|
size -= (crnt_size + SECTION_HDR_SIZE); |
|
} |
|
|
|
return UCODE_OK; |
|
} |
|
|
|
static enum ucode_state |
|
load_microcode_amd(bool save, u8 family, const u8 *data, size_t size) |
|
{ |
|
struct ucode_patch *p; |
|
enum ucode_state ret; |
|
|
|
/* free old equiv table */ |
|
free_equiv_cpu_table(); |
|
|
|
ret = __load_microcode_amd(family, data, size); |
|
if (ret != UCODE_OK) { |
|
cleanup(); |
|
return ret; |
|
} |
|
|
|
p = find_patch(0); |
|
if (!p) { |
|
return ret; |
|
} else { |
|
if (boot_cpu_data.microcode >= p->patch_id) |
|
return ret; |
|
|
|
ret = UCODE_NEW; |
|
} |
|
|
|
/* save BSP's matching patch for early load */ |
|
if (!save) |
|
return ret; |
|
|
|
memset(amd_ucode_patch, 0, PATCH_MAX_SIZE); |
|
memcpy(amd_ucode_patch, p->data, min_t(u32, ksize(p->data), PATCH_MAX_SIZE)); |
|
|
|
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); |
|
bool bsp = c->cpu_index == boot_cpu_data.cpu_index; |
|
enum ucode_state ret = UCODE_NFOUND; |
|
const struct firmware *fw; |
|
|
|
/* reload ucode container only on the boot cpu */ |
|
if (!refresh_fw || !bsp) |
|
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_direct(&fw, (const char *)fw_name, device)) { |
|
pr_debug("failed to load file %s\n", fw_name); |
|
goto out; |
|
} |
|
|
|
ret = UCODE_ERROR; |
|
if (!verify_container(fw->data, fw->size, false)) |
|
goto fw_release; |
|
|
|
ret = load_microcode_amd(bsp, 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 = &boot_cpu_data; |
|
|
|
if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) { |
|
pr_warn("AMD CPU family 0x%x not supported\n", c->x86); |
|
return NULL; |
|
} |
|
|
|
if (ucode_new_rev) |
|
pr_info_once("microcode updated early to new patch_level=0x%08x\n", |
|
ucode_new_rev); |
|
|
|
return µcode_amd_ops; |
|
} |
|
|
|
void __exit exit_amd_microcode(void) |
|
{ |
|
cleanup(); |
|
}
|
|
|