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-rw-r--r--arch/x86/include/asm/microcode.h2
-rw-r--r--arch/x86/kernel/microcode_amd.c87
-rw-r--r--arch/x86/kernel/microcode_core.c8
3 files changed, 55 insertions, 42 deletions
diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index ef51b50..c24ca9a 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -12,6 +12,8 @@ struct device;
enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
struct microcode_ops {
+ void (*init)(struct device *device);
+ void (*fini)(void);
enum ucode_state (*request_microcode_user) (int cpu,
const void __user *buf, size_t size);
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index f4c538b..63123d9 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -33,6 +33,9 @@ MODULE_LICENSE("GPL v2");
#define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000
#define UCODE_UCODE_TYPE 0x00000001
+const struct firmware *firmware;
+static int supported_cpu;
+
struct equiv_cpu_entry {
u32 installed_cpu;
u32 fixed_errata_mask;
@@ -71,17 +74,14 @@ static struct equiv_cpu_entry *equiv_cpu_table;
static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
u32 dummy;
- memset(csig, 0, sizeof(*csig));
- if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
- printk(KERN_WARNING "microcode: CPU%d: AMD CPU family 0x%x not "
- "supported\n", cpu, c->x86);
+ if (!supported_cpu)
return -1;
- }
+
+ memset(csig, 0, sizeof(*csig));
rdmsr(MSR_AMD64_PATCH_LEVEL, csig->rev, dummy);
- printk(KERN_INFO "microcode: CPU%d: patch_level=0x%x\n", cpu, csig->rev);
+ pr_info("microcode: CPU%d: patch_level=0x%x\n", cpu, csig->rev);
return 0;
}
@@ -103,22 +103,15 @@ static int get_matching_microcode(int cpu, void *mc, int rev)
i++;
}
- if (!equiv_cpu_id) {
- printk(KERN_WARNING "microcode: CPU%d: cpu revision "
- "not listed in equivalent cpu table\n", cpu);
+ if (!equiv_cpu_id)
return 0;
- }
- if (mc_header->processor_rev_id != equiv_cpu_id) {
- printk(KERN_ERR "microcode: CPU%d: patch mismatch "
- "(processor_rev_id: %x, equiv_cpu_id: %x)\n",
- cpu, mc_header->processor_rev_id, equiv_cpu_id);
+ if (mc_header->processor_rev_id != equiv_cpu_id)
return 0;
- }
/* ucode might be chipset specific -- currently we don't support this */
if (mc_header->nb_dev_id || mc_header->sb_dev_id) {
- printk(KERN_ERR "microcode: CPU%d: loading of chipset "
+ pr_err(KERN_ERR "microcode: CPU%d: loading of chipset "
"specific code not yet supported\n", cpu);
return 0;
}
@@ -148,14 +141,12 @@ static int apply_microcode_amd(int cpu)
/* check current patch id and patch's id for match */
if (rev != mc_amd->hdr.patch_id) {
- printk(KERN_ERR "microcode: CPU%d: update failed "
+ pr_err("microcode: CPU%d: update failed "
"(for patch_level=0x%x)\n", cpu, mc_amd->hdr.patch_id);
return -1;
}
- printk(KERN_INFO "microcode: CPU%d: updated (new patch_level=0x%x)\n",
- cpu, rev);
-
+ pr_info("microcode: CPU%d: updated (new patch_level=0x%x)\n", cpu, rev);
uci->cpu_sig.rev = rev;
return 0;
@@ -178,18 +169,15 @@ get_next_ucode(const u8 *buf, unsigned int size, unsigned int *mc_size)
return NULL;
if (section_hdr[0] != UCODE_UCODE_TYPE) {
- printk(KERN_ERR "microcode: error: invalid type field in "
+ pr_err("microcode: error: invalid type field in "
"container file section header\n");
return NULL;
}
total_size = (unsigned long) (section_hdr[4] + (section_hdr[5] << 8));
- printk(KERN_DEBUG "microcode: size %u, total_size %u\n",
- size, total_size);
-
if (total_size > size || total_size > UCODE_MAX_SIZE) {
- printk(KERN_ERR "microcode: error: size mismatch\n");
+ pr_err("microcode: error: size mismatch\n");
return NULL;
}
@@ -218,15 +206,14 @@ static int install_equiv_cpu_table(const u8 *buf)
size = buf_pos[2];
if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
- printk(KERN_ERR "microcode: error: invalid type field in "
+ pr_err("microcode: error: invalid type field in "
"container file section header\n");
return 0;
}
equiv_cpu_table = (struct equiv_cpu_entry *) vmalloc(size);
if (!equiv_cpu_table) {
- printk(KERN_ERR "microcode: failed to allocate "
- "equivalent CPU table\n");
+ pr_err("microcode: failed to allocate equivalent CPU table\n");
return 0;
}
@@ -259,8 +246,7 @@ generic_load_microcode(int cpu, const u8 *data, size_t size)
offset = install_equiv_cpu_table(ucode_ptr);
if (!offset) {
- printk(KERN_ERR "microcode: failed to create "
- "equivalent cpu table\n");
+ pr_err("microcode: failed to create equivalent cpu table\n");
return UCODE_ERROR;
}
@@ -308,33 +294,27 @@ generic_load_microcode(int cpu, const u8 *data, size_t size)
static enum ucode_state request_microcode_fw(int cpu, struct device *device)
{
- const char *fw_name = "amd-ucode/microcode_amd.bin";
- const struct firmware *firmware;
enum ucode_state ret;
- if (request_firmware(&firmware, fw_name, device)) {
- printk(KERN_ERR "microcode: failed to load file %s\n", fw_name);
+ if (firmware == NULL)
return UCODE_NFOUND;
- }
if (*(u32 *)firmware->data != UCODE_MAGIC) {
- printk(KERN_ERR "microcode: invalid UCODE_MAGIC (0x%08x)\n",
+ pr_err("microcode: invalid UCODE_MAGIC (0x%08x)\n",
*(u32 *)firmware->data);
return UCODE_ERROR;
}
ret = generic_load_microcode(cpu, firmware->data, firmware->size);
- release_firmware(firmware);
-
return ret;
}
static enum ucode_state
request_microcode_user(int cpu, const void __user *buf, size_t size)
{
- printk(KERN_INFO "microcode: AMD microcode update via "
- "/dev/cpu/microcode not supported\n");
+ pr_info("microcode: AMD microcode update via "
+ "/dev/cpu/microcode not supported\n");
return UCODE_ERROR;
}
@@ -346,7 +326,32 @@ static void microcode_fini_cpu_amd(int cpu)
uci->mc = NULL;
}
+void init_microcode_amd(struct device *device)
+{
+ const char *fw_name = "amd-ucode/microcode_amd.bin";
+ struct cpuinfo_x86 *c = &boot_cpu_data;
+
+ WARN_ON(c->x86_vendor != X86_VENDOR_AMD);
+
+ if (c->x86 < 0x10) {
+ pr_warning("microcode: AMD CPU family 0x%x not supported\n",
+ c->x86);
+ return;
+ }
+ supported_cpu = 1;
+
+ if (request_firmware(&firmware, fw_name, device))
+ pr_err("microcode: failed to load file %s\n", fw_name);
+}
+
+void fini_microcode_amd(void)
+{
+ release_firmware(firmware);
+}
+
static struct microcode_ops microcode_amd_ops = {
+ .init = init_microcode_amd,
+ .fini = fini_microcode_amd,
.request_microcode_user = request_microcode_user,
.request_microcode_fw = request_microcode_fw,
.collect_cpu_info = collect_cpu_info_amd,
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 2bcad39..e68aae3 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -391,7 +391,7 @@ static enum ucode_state microcode_update_cpu(int cpu)
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
enum ucode_state ustate;
- if (uci->valid)
+ if (uci->valid && uci->mc)
ustate = microcode_resume_cpu(cpu);
else
ustate = microcode_init_cpu(cpu);
@@ -518,6 +518,9 @@ static int __init microcode_init(void)
return PTR_ERR(microcode_pdev);
}
+ if (microcode_ops->init)
+ microcode_ops->init(&microcode_pdev->dev);
+
get_online_cpus();
mutex_lock(&microcode_mutex);
@@ -561,6 +564,9 @@ static void __exit microcode_exit(void)
platform_device_unregister(microcode_pdev);
+ if (microcode_ops->fini)
+ microcode_ops->fini();
+
microcode_ops = NULL;
pr_info("Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
generated by cgit v0.10.2 at 2024-11-03 05:19:56 (GMT)