mirror of https://gitee.com/openkylin/linux.git
Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, microcode, AMD: Fix signedness bug in generic_load_microcode() x86, microcode, AMD: Extend ucode size verification x86, microcode, AMD: Cleanup dmesg output x86, microcode, AMD: Remove unneeded memset call x86, microcode, AMD: Simplify get_next_ucode x86, microcode, AMD: Simplify install_equiv_cpu_table x86, microcode, AMD: Release firmware on error x86, microcode: Correct sysdev_add error path
This commit is contained in:
Linus Torvalds
commit
209b6c8fa7
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@ -66,7 +66,6 @@ struct microcode_amd {
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unsigned int mpb[0];
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};
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#define UCODE_MAX_SIZE 2048
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#define UCODE_CONTAINER_SECTION_HDR 8
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#define UCODE_CONTAINER_HEADER_SIZE 12
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@ -77,20 +76,20 @@ static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
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struct cpuinfo_x86 *c = &cpu_data(cpu);
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u32 dummy;
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memset(csig, 0, sizeof(*csig));
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if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
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pr_warning("microcode: CPU%d: AMD CPU family 0x%x not "
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"supported\n", cpu, c->x86);
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pr_warning("CPU%d: family %d not supported\n", cpu, c->x86);
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return -1;
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}
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rdmsr(MSR_AMD64_PATCH_LEVEL, csig->rev, dummy);
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pr_info("CPU%d: patch_level=0x%x\n", cpu, csig->rev);
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pr_info("CPU%d: patch_level=0x%08x\n", cpu, csig->rev);
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return 0;
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}
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static int get_matching_microcode(int cpu, void *mc, int rev)
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static int get_matching_microcode(int cpu, struct microcode_header_amd *mc_hdr,
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int rev)
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{
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struct microcode_header_amd *mc_header = mc;
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unsigned int current_cpu_id;
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u16 equiv_cpu_id = 0;
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unsigned int i = 0;
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@ -109,17 +108,17 @@ static int get_matching_microcode(int cpu, void *mc, int rev)
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if (!equiv_cpu_id)
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return 0;
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if (mc_header->processor_rev_id != equiv_cpu_id)
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if (mc_hdr->processor_rev_id != equiv_cpu_id)
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return 0;
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/* ucode might be chipset specific -- currently we don't support this */
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if (mc_header->nb_dev_id || mc_header->sb_dev_id) {
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pr_err("CPU%d: loading of chipset specific code not yet supported\n",
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if (mc_hdr->nb_dev_id || mc_hdr->sb_dev_id) {
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pr_err("CPU%d: chipset specific code not yet supported\n",
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cpu);
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return 0;
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}
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if (mc_header->patch_id <= rev)
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if (mc_hdr->patch_id <= rev)
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return 0;
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return 1;
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@ -144,71 +143,93 @@ static int apply_microcode_amd(int cpu)
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/* check current patch id and patch's id for match */
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if (rev != mc_amd->hdr.patch_id) {
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pr_err("CPU%d: update failed (for patch_level=0x%x)\n",
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pr_err("CPU%d: update failed for patch_level=0x%08x\n",
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cpu, mc_amd->hdr.patch_id);
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return -1;
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}
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pr_info("CPU%d: updated (new patch_level=0x%x)\n", cpu, rev);
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pr_info("CPU%d: new patch_level=0x%08x\n", cpu, rev);
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uci->cpu_sig.rev = rev;
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return 0;
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}
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static void *
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get_next_ucode(const u8 *buf, unsigned int size, unsigned int *mc_size)
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static unsigned int verify_ucode_size(int cpu, const u8 *buf, unsigned int size)
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{
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unsigned int total_size;
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u8 section_hdr[UCODE_CONTAINER_SECTION_HDR];
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void *mc;
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struct cpuinfo_x86 *c = &cpu_data(cpu);
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unsigned int max_size, actual_size;
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get_ucode_data(section_hdr, buf, UCODE_CONTAINER_SECTION_HDR);
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#define F1XH_MPB_MAX_SIZE 2048
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#define F14H_MPB_MAX_SIZE 1824
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#define F15H_MPB_MAX_SIZE 4096
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if (section_hdr[0] != UCODE_UCODE_TYPE) {
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pr_err("error: invalid type field in container file section header\n");
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return NULL;
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switch (c->x86) {
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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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case 0x15:
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max_size = F15H_MPB_MAX_SIZE;
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break;
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default:
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max_size = F1XH_MPB_MAX_SIZE;
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break;
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}
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total_size = (unsigned long) (section_hdr[4] + (section_hdr[5] << 8));
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actual_size = buf[4] + (buf[5] << 8);
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if (total_size > size || total_size > UCODE_MAX_SIZE) {
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pr_err("error: size mismatch\n");
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return NULL;
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if (actual_size > size || actual_size > max_size) {
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pr_err("section size mismatch\n");
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return 0;
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}
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mc = vzalloc(UCODE_MAX_SIZE);
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return actual_size;
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}
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static struct microcode_header_amd *
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get_next_ucode(int cpu, const u8 *buf, unsigned int size, unsigned int *mc_size)
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{
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struct microcode_header_amd *mc = NULL;
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unsigned int actual_size = 0;
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if (buf[0] != UCODE_UCODE_TYPE) {
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pr_err("invalid type field in container file section header\n");
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goto out;
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}
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actual_size = verify_ucode_size(cpu, buf, size);
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if (!actual_size)
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goto out;
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mc = vzalloc(actual_size);
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if (!mc)
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return NULL;
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goto out;
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get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR, total_size);
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*mc_size = total_size + UCODE_CONTAINER_SECTION_HDR;
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get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR, actual_size);
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*mc_size = actual_size + UCODE_CONTAINER_SECTION_HDR;
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out:
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return mc;
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}
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static int install_equiv_cpu_table(const u8 *buf)
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{
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u8 *container_hdr[UCODE_CONTAINER_HEADER_SIZE];
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unsigned int *buf_pos = (unsigned int *)container_hdr;
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unsigned long size;
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unsigned int *ibuf = (unsigned int *)buf;
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unsigned int type = ibuf[1];
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unsigned int size = ibuf[2];
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get_ucode_data(&container_hdr, buf, UCODE_CONTAINER_HEADER_SIZE);
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size = buf_pos[2];
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if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
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pr_err("error: invalid type field in container file section header\n");
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return 0;
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if (type != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
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pr_err("empty section/"
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"invalid type field in container file section header\n");
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return -EINVAL;
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}
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equiv_cpu_table = vmalloc(size);
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if (!equiv_cpu_table) {
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pr_err("failed to allocate equivalent CPU table\n");
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return 0;
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return -ENOMEM;
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}
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buf += UCODE_CONTAINER_HEADER_SIZE;
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get_ucode_data(equiv_cpu_table, buf, size);
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get_ucode_data(equiv_cpu_table, buf + UCODE_CONTAINER_HEADER_SIZE, size);
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return size + UCODE_CONTAINER_HEADER_SIZE; /* add header length */
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}
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@ -223,16 +244,16 @@ static enum ucode_state
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generic_load_microcode(int cpu, const u8 *data, size_t size)
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{
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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struct microcode_header_amd *mc_hdr = NULL;
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unsigned int mc_size, leftover;
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int offset;
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const u8 *ucode_ptr = data;
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void *new_mc = NULL;
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void *mc;
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int new_rev = uci->cpu_sig.rev;
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unsigned int leftover;
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unsigned long offset;
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unsigned int new_rev = uci->cpu_sig.rev;
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enum ucode_state state = UCODE_OK;
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offset = install_equiv_cpu_table(ucode_ptr);
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if (!offset) {
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if (offset < 0) {
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pr_err("failed to create equivalent cpu table\n");
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return UCODE_ERROR;
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}
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@ -241,64 +262,65 @@ generic_load_microcode(int cpu, const u8 *data, size_t size)
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leftover = size - offset;
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while (leftover) {
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unsigned int uninitialized_var(mc_size);
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struct microcode_header_amd *mc_header;
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mc = get_next_ucode(ucode_ptr, leftover, &mc_size);
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if (!mc)
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mc_hdr = get_next_ucode(cpu, ucode_ptr, leftover, &mc_size);
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if (!mc_hdr)
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break;
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mc_header = (struct microcode_header_amd *)mc;
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if (get_matching_microcode(cpu, mc, new_rev)) {
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if (get_matching_microcode(cpu, mc_hdr, new_rev)) {
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vfree(new_mc);
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new_rev = mc_header->patch_id;
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new_mc = mc;
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new_rev = mc_hdr->patch_id;
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new_mc = mc_hdr;
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} else
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vfree(mc);
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vfree(mc_hdr);
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ucode_ptr += mc_size;
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leftover -= mc_size;
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}
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if (new_mc) {
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if (!leftover) {
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vfree(uci->mc);
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uci->mc = new_mc;
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pr_debug("CPU%d found a matching microcode update with version 0x%x (current=0x%x)\n",
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cpu, new_rev, uci->cpu_sig.rev);
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} else {
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vfree(new_mc);
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state = UCODE_ERROR;
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}
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} else
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if (!new_mc) {
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state = UCODE_NFOUND;
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goto free_table;
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}
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if (!leftover) {
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vfree(uci->mc);
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uci->mc = new_mc;
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pr_debug("CPU%d update ucode (0x%08x -> 0x%08x)\n",
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cpu, uci->cpu_sig.rev, new_rev);
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} else {
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vfree(new_mc);
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state = UCODE_ERROR;
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}
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free_table:
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free_equiv_cpu_table();
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return state;
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}
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static enum ucode_state request_microcode_fw(int cpu, struct device *device)
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static enum ucode_state request_microcode_amd(int cpu, struct device *device)
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{
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const char *fw_name = "amd-ucode/microcode_amd.bin";
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const struct firmware *firmware;
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enum ucode_state ret;
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const struct firmware *fw;
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enum ucode_state ret = UCODE_NFOUND;
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if (request_firmware(&firmware, fw_name, device)) {
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printk(KERN_ERR "microcode: failed to load file %s\n", fw_name);
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return UCODE_NFOUND;
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if (request_firmware(&fw, fw_name, device)) {
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pr_err("failed to load file %s\n", fw_name);
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goto out;
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}
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if (*(u32 *)firmware->data != UCODE_MAGIC) {
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pr_err("invalid UCODE_MAGIC (0x%08x)\n",
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*(u32 *)firmware->data);
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return UCODE_ERROR;
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ret = UCODE_ERROR;
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if (*(u32 *)fw->data != UCODE_MAGIC) {
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pr_err("invalid magic value (0x%08x)\n", *(u32 *)fw->data);
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goto fw_release;
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}
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ret = generic_load_microcode(cpu, firmware->data, firmware->size);
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ret = generic_load_microcode(cpu, fw->data, fw->size);
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release_firmware(firmware);
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fw_release:
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release_firmware(fw);
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out:
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return ret;
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}
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@ -319,7 +341,7 @@ static void microcode_fini_cpu_amd(int cpu)
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static struct microcode_ops microcode_amd_ops = {
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.request_microcode_user = request_microcode_user,
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.request_microcode_fw = request_microcode_fw,
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.request_microcode_fw = request_microcode_amd,
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.collect_cpu_info = collect_cpu_info_amd,
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.apply_microcode = apply_microcode_amd,
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.microcode_fini_cpu = microcode_fini_cpu_amd,
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@ -417,8 +417,10 @@ static int mc_sysdev_add(struct sys_device *sys_dev)
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if (err)
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return err;
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if (microcode_init_cpu(cpu) == UCODE_ERROR)
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err = -EINVAL;
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if (microcode_init_cpu(cpu) == UCODE_ERROR) {
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sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
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return -EINVAL;
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}
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return err;
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}
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