mirror of
https://github.com/FEX-Emu/linux.git
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x86, microcode rework, v2
this is a rework of the microcode splitup in tip/x86/microcode
(1) I think this new interface is cleaner (look at the changes
in 'struct microcode_ops' in microcode.h);
(2) it's -64 lines of code;
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Dmitry Adamushko
Ingo Molnar
parent
5b792d320f
commit
a0a29b62a9
@ -110,50 +110,28 @@ struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
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EXPORT_SYMBOL_GPL(ucode_cpu_info);
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#ifdef CONFIG_MICROCODE_OLD_INTERFACE
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void __user *user_buffer; /* user area microcode data buffer */
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EXPORT_SYMBOL_GPL(user_buffer);
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unsigned int user_buffer_size; /* it's size */
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EXPORT_SYMBOL_GPL(user_buffer_size);
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static int do_microcode_update(void)
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static int do_microcode_update(const void __user *buf, size_t size)
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{
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long cursor = 0;
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int error = 0;
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void *new_mc = NULL;
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int cpu;
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cpumask_t old;
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int error = 0;
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int cpu;
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old = current->cpus_allowed;
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while ((cursor = microcode_ops->get_next_ucode(&new_mc, cursor)) > 0) {
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if (microcode_ops->microcode_sanity_check != NULL)
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error = microcode_ops->microcode_sanity_check(new_mc);
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if (error)
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goto out;
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/*
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* It's possible the data file has multiple matching ucode,
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* lets keep searching till the latest version
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*/
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for_each_online_cpu(cpu) {
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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for_each_online_cpu(cpu) {
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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if (!uci->valid)
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continue;
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set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
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error = microcode_ops->get_matching_microcode(new_mc,
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cpu);
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if (error < 0)
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goto out;
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if (error == 1)
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microcode_ops->apply_microcode(cpu);
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}
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vfree(new_mc);
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if (!uci->valid)
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continue;
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set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
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error = microcode_ops->request_microcode_user(cpu, buf, size);
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if (error < 0)
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goto out;
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if (!error)
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microcode_ops->apply_microcode(cpu);
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}
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out:
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if (cursor > 0)
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vfree(new_mc);
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if (cursor < 0)
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error = cursor;
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set_cpus_allowed_ptr(current, &old);
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return error;
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}
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@ -178,10 +156,7 @@ static ssize_t microcode_write(struct file *file, const char __user *buf,
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get_online_cpus();
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mutex_lock(µcode_mutex);
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user_buffer = (void __user *) buf;
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user_buffer_size = (int) len;
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ret = do_microcode_update();
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ret = do_microcode_update(buf, len);
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if (!ret)
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ret = (ssize_t)len;
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@ -231,7 +206,6 @@ MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
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/* fake device for request_firmware */
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struct platform_device *microcode_pdev;
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EXPORT_SYMBOL_GPL(microcode_pdev);
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static ssize_t reload_store(struct sys_device *dev,
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struct sysdev_attribute *attr,
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@ -252,8 +226,12 @@ static ssize_t reload_store(struct sys_device *dev,
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if (cpu_online(cpu)) {
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set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
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mutex_lock(µcode_mutex);
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if (uci->valid)
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err = microcode_ops->cpu_request_microcode(cpu);
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if (uci->valid) {
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err = microcode_ops->request_microcode_fw(cpu,
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µcode_pdev->dev);
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if (!err)
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microcode_ops->apply_microcode(cpu);
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}
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mutex_unlock(µcode_mutex);
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set_cpus_allowed_ptr(current, &old);
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}
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@ -315,7 +293,7 @@ static void collect_cpu_info(int cpu)
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uci->valid = 1;
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}
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static void microcode_resume_cpu(int cpu)
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static int microcode_resume_cpu(int cpu)
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{
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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struct cpu_signature nsig;
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@ -323,7 +301,7 @@ static void microcode_resume_cpu(int cpu)
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pr_debug("microcode: CPU%d resumed\n", cpu);
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if (!uci->mc.valid_mc)
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return;
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return 1;
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/*
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* Let's verify that the 'cached' ucode does belong
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@ -331,21 +309,22 @@ static void microcode_resume_cpu(int cpu)
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*/
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if (microcode_ops->collect_cpu_info(cpu, &nsig)) {
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microcode_fini_cpu(cpu);
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return;
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return -1;
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}
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if (memcmp(&nsig, &uci->cpu_sig, sizeof(nsig))) {
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microcode_fini_cpu(cpu);
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/* Should we look for a new ucode here? */
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return;
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return 1;
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}
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microcode_ops->apply_microcode(cpu);
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return 0;
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}
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void microcode_update_cpu(int cpu)
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{
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struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
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int err = 0;
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/* We should bind the task to the CPU */
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BUG_ON(raw_smp_processor_id() != cpu);
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@ -356,12 +335,17 @@ void microcode_update_cpu(int cpu)
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* otherwise just request a firmware:
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*/
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if (uci->valid) {
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microcode_resume_cpu(cpu);
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err = microcode_resume_cpu(cpu);
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} else {
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collect_cpu_info(cpu);
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if (uci->valid && system_state == SYSTEM_RUNNING)
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microcode_ops->cpu_request_microcode(cpu);
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err = microcode_ops->request_microcode_fw(cpu,
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µcode_pdev->dev);
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}
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if (!err)
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microcode_ops->apply_microcode(cpu);
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mutex_unlock(µcode_mutex);
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}
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@ -414,7 +398,7 @@ static int mc_sysdev_resume(struct sys_device *dev)
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return 0;
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pr_debug("microcode: CPU%d resumed\n", cpu);
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/* only CPU 0 will apply ucode here */
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microcode_ops->apply_microcode(0);
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microcode_update_cpu(0);
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return 0;
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}
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@ -59,7 +59,7 @@ MODULE_LICENSE("GPL v2");
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/* serialize access to the physical write */
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static DEFINE_SPINLOCK(microcode_update_lock);
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struct equiv_cpu_entry *equiv_cpu_table;
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static struct equiv_cpu_entry *equiv_cpu_table;
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static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
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{
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@ -83,36 +83,37 @@ static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
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return 0;
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}
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static int get_matching_microcode_amd(void *mc, int cpu)
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static int get_matching_microcode(int cpu, void *mc, int rev)
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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_header = mc;
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unsigned long total_size = get_totalsize(mc_header);
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void *new_mc;
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struct pci_dev *nb_pci_dev, *sb_pci_dev;
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unsigned int current_cpu_id;
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unsigned int equiv_cpu_id = 0x00;
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unsigned int i = 0;
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/* We should bind the task to the CPU */
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BUG_ON(cpu != raw_smp_processor_id());
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/* This is a tricky part. We might be called from a write operation */
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/* to the device file instead of the usual process of firmware */
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/* loading. This routine needs to be able to distinguish both */
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/* cases. This is done by checking if there alread is a equivalent */
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/* CPU table installed. If not, we're written through */
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/* /dev/cpu/microcode. */
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/* Since we ignore all checks. The error case in which going through */
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/* firmware loading and that table is not loaded has already been */
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/* checked earlier. */
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/*
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* dimm: do we need this? Why an update via /dev/... is different
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* from the one via firmware?
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*
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* This is a tricky part. We might be called from a write operation
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* to the device file instead of the usual process of firmware
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* loading. This routine needs to be able to distinguish both
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* cases. This is done by checking if there alread is a equivalent
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* CPU table installed. If not, we're written through
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* /dev/cpu/microcode.
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* Since we ignore all checks. The error case in which going through
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* firmware loading and that table is not loaded has already been
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* checked earlier.
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*/
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BUG_ON(equiv_cpu_table == NULL);
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#if 0
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if (equiv_cpu_table == NULL) {
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printk(KERN_INFO "microcode: CPU%d microcode update with "
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"version 0x%x (current=0x%x)\n",
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cpu, mc_header->patch_id, uci->cpu_sig.rev);
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goto out;
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}
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#endif
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current_cpu_id = cpuid_eax(0x00000001);
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while (equiv_cpu_table[i].installed_cpu != 0) {
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@ -175,27 +176,9 @@ static int get_matching_microcode_amd(void *mc, int cpu)
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pci_dev_put(sb_pci_dev);
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}
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if (mc_header->patch_id <= uci->cpu_sig.rev)
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if (mc_header->patch_id <= rev)
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return 0;
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printk(KERN_INFO "microcode: CPU%d found a matching microcode "
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"update with version 0x%x (current=0x%x)\n",
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cpu, mc_header->patch_id, uci->cpu_sig.rev);
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out:
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new_mc = vmalloc(UCODE_MAX_SIZE);
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if (!new_mc) {
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printk(KERN_ERR "microcode: error, can't allocate memory\n");
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return -ENOMEM;
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}
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memset(new_mc, 0, UCODE_MAX_SIZE);
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/* free previous update file */
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vfree(uci->mc.mc_amd);
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memcpy(new_mc, mc, total_size);
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uci->mc.mc_amd = new_mc;
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return 1;
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}
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@ -245,104 +228,65 @@ static void apply_microcode_amd(int cpu)
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uci->cpu_sig.rev = rev;
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}
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#ifdef CONFIG_MICROCODE_OLD_INTERFACE
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extern void __user *user_buffer; /* user area microcode data buffer */
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extern unsigned int user_buffer_size; /* it's size */
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static long get_next_ucode_amd(void **mc, long offset)
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static void * get_next_ucode(u8 *buf, unsigned int size,
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int (*get_ucode_data)(void *, const void *, size_t),
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unsigned int *mc_size)
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{
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struct microcode_header_amd mc_header;
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unsigned long total_size;
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unsigned int total_size;
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#define UCODE_UNKNOWN_HDR 8
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u8 hdr[UCODE_UNKNOWN_HDR];
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void *mc;
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/* No more data */
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if (offset >= user_buffer_size)
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return 0;
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if (copy_from_user(&mc_header, user_buffer + offset, MC_HEADER_SIZE)) {
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printk(KERN_ERR "microcode: error! Can not read user data\n");
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return -EFAULT;
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}
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total_size = get_totalsize(&mc_header);
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if (offset + total_size > user_buffer_size) {
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printk(KERN_ERR "microcode: error! Bad total size in microcode "
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"data file\n");
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return -EINVAL;
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}
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*mc = vmalloc(UCODE_MAX_SIZE);
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if (!*mc)
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return -ENOMEM;
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memset(*mc, 0, UCODE_MAX_SIZE);
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if (get_ucode_data(hdr, buf, UCODE_UNKNOWN_HDR))
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return NULL;
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if (copy_from_user(*mc, user_buffer + offset, total_size)) {
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printk(KERN_ERR "microcode: error! Can not read user data\n");
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vfree(*mc);
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return -EFAULT;
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}
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return offset + total_size;
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}
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#else
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#define get_next_ucode_amd() NULL
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#endif
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static long get_next_ucode_from_buffer_amd(void **mc, void *buf,
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unsigned long size, long offset)
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{
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struct microcode_header_amd *mc_header;
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unsigned long total_size;
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unsigned char *buf_pos = buf;
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/* No more data */
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if (offset >= size)
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return 0;
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if (buf_pos[offset] != UCODE_UCODE_TYPE) {
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if (hdr[0] != UCODE_UCODE_TYPE) {
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printk(KERN_ERR "microcode: error! "
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"Wrong microcode payload type field\n");
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return -EINVAL;
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return NULL;
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}
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mc_header = (struct microcode_header_amd *)(&buf_pos[offset+8]);
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/* Why not by means of get_totalsize(hdr)? */
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total_size = (unsigned long) (hdr[4] + (hdr[5] << 8));
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total_size = (unsigned long) (buf_pos[offset+4] +
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(buf_pos[offset+5] << 8));
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printk(KERN_INFO "microcode: size %u, total_size %u\n",
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size, total_size);
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printk(KERN_INFO "microcode: size %lu, total_size %lu, offset %ld\n",
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size, total_size, offset);
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if (offset + total_size > size) {
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if (total_size > size || total_size > UCODE_MAX_SIZE) {
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printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
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return -EINVAL;
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return NULL;
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}
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*mc = vmalloc(UCODE_MAX_SIZE);
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if (!*mc) {
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printk(KERN_ERR "microcode: error! "
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"Can not allocate memory for microcode patch\n");
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return -ENOMEM;
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mc = vmalloc(UCODE_MAX_SIZE);
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if (mc) {
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memset(mc, 0, UCODE_MAX_SIZE);
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if (get_ucode_data(mc, buf + UCODE_UNKNOWN_HDR, total_size)) {
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vfree(mc);
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mc = NULL;
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} else
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*mc_size = total_size + UCODE_UNKNOWN_HDR;
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}
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memset(*mc, 0, UCODE_MAX_SIZE);
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memcpy(*mc, buf + offset + 8, total_size);
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return offset + total_size + 8;
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#undef UCODE_UNKNOWN_HDR
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return mc;
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}
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static long install_equiv_cpu_table(void *buf, unsigned long size, long offset)
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static int install_equiv_cpu_table(u8 *buf,
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int (*get_ucode_data)(void *, const void *, size_t))
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{
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unsigned int *buf_pos = buf;
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#define UCODE_HEADER_SIZE 12
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u8 *hdr[UCODE_HEADER_SIZE];
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unsigned int *buf_pos = (unsigned int *)hdr;
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unsigned long size;
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/* No more data */
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if (offset >= size)
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if (get_ucode_data(&hdr, buf, UCODE_HEADER_SIZE))
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return 0;
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if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE) {
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printk(KERN_ERR "microcode: error! "
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"Wrong microcode equivalnet cpu table type field\n");
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return 0;
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}
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size = buf_pos[2];
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if (size == 0) {
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if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
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printk(KERN_ERR "microcode: error! "
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"Wrong microcode equivalnet cpu table length\n");
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"Wrong microcode equivalnet cpu table\n");
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return 0;
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}
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@ -352,79 +296,118 @@ static long install_equiv_cpu_table(void *buf, unsigned long size, long offset)
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return 0;
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}
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memset(equiv_cpu_table, 0, size);
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memcpy(equiv_cpu_table, &buf_pos[3], size);
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buf += UCODE_HEADER_SIZE;
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if (get_ucode_data(equiv_cpu_table, buf, size)) {
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vfree(equiv_cpu_table);
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return 0;
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}
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return size + 12; /* add header length */
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return size + UCODE_HEADER_SIZE; /* add header length */
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#undef UCODE_HEADER_SIZE
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}
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/* fake device for request_firmware */
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extern struct platform_device *microcode_pdev;
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static int cpu_request_microcode_amd(int cpu)
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static void free_equiv_cpu_table(void)
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{
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char name[30];
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const struct firmware *firmware;
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void *buf;
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unsigned int *buf_pos;
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unsigned long size;
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long offset = 0;
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int error;
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void *mc;
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/* We should bind the task to the CPU */
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BUG_ON(cpu != raw_smp_processor_id());
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sprintf(name, "amd-ucode/microcode_amd.bin");
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error = request_firmware(&firmware, "amd-ucode/microcode_amd.bin",
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µcode_pdev->dev);
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if (error) {
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printk(KERN_ERR "microcode: ucode data file %s load failed\n",
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name);
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return error;
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if (equiv_cpu_table) {
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vfree(equiv_cpu_table);
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equiv_cpu_table = NULL;
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}
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}
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|
||||
buf_pos = (unsigned int *)firmware->data;
|
||||
buf = (void *)firmware->data;
|
||||
size = firmware->size;
|
||||
|
||||
if (buf_pos[0] != UCODE_MAGIC) {
|
||||
printk(KERN_ERR "microcode: error! Wrong microcode patch file magic\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
offset = install_equiv_cpu_table(buf, buf_pos[2], offset);
|
||||
static int generic_load_microcode(int cpu, void *data, size_t size,
|
||||
int (*get_ucode_data)(void *, const void *, size_t))
|
||||
{
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
|
||||
u8 *ucode_ptr = data, *new_mc = NULL, *mc;
|
||||
int new_rev = uci->cpu_sig.rev;
|
||||
unsigned int leftover;
|
||||
unsigned long offset;
|
||||
|
||||
offset = install_equiv_cpu_table(ucode_ptr, get_ucode_data);
|
||||
if (!offset) {
|
||||
printk(KERN_ERR "microcode: installing equivalent cpu table failed\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
while ((offset =
|
||||
get_next_ucode_from_buffer_amd(&mc, buf, size, offset)) > 0) {
|
||||
error = get_matching_microcode_amd(mc, cpu);
|
||||
if (error < 0)
|
||||
ucode_ptr += offset;
|
||||
leftover = size - offset;
|
||||
|
||||
while (leftover) {
|
||||
unsigned int mc_size;
|
||||
struct microcode_header_amd *mc_header;
|
||||
|
||||
mc = get_next_ucode(ucode_ptr, leftover, get_ucode_data, &mc_size);
|
||||
if (!mc)
|
||||
break;
|
||||
/*
|
||||
* It's possible the data file has multiple matching ucode,
|
||||
* lets keep searching till the latest version
|
||||
*/
|
||||
if (error == 1) {
|
||||
apply_microcode_amd(cpu);
|
||||
error = 0;
|
||||
}
|
||||
vfree(mc);
|
||||
|
||||
mc_header = (struct microcode_header_amd *)mc;
|
||||
if (get_matching_microcode(cpu, mc, new_rev)) {
|
||||
new_rev = mc_header->patch_id;
|
||||
new_mc = mc;
|
||||
} else
|
||||
vfree(mc);
|
||||
|
||||
ucode_ptr += mc_size;
|
||||
leftover -= mc_size;
|
||||
}
|
||||
if (offset > 0) {
|
||||
vfree(mc);
|
||||
vfree(equiv_cpu_table);
|
||||
equiv_cpu_table = NULL;
|
||||
|
||||
if (new_mc) {
|
||||
if (!leftover) {
|
||||
if (uci->mc.mc_amd)
|
||||
vfree(uci->mc.mc_amd);
|
||||
uci->mc.mc_amd = (struct microcode_amd *)new_mc;
|
||||
pr_debug("microcode: CPU%d found a matching microcode update with"
|
||||
" version 0x%x (current=0x%x)\n",
|
||||
cpu, uci->mc.mc_amd->hdr.patch_id, uci->cpu_sig.rev);
|
||||
} else
|
||||
vfree(new_mc);
|
||||
}
|
||||
if (offset < 0)
|
||||
error = offset;
|
||||
|
||||
free_equiv_cpu_table();
|
||||
|
||||
return (int)leftover;
|
||||
}
|
||||
|
||||
static int get_ucode_fw(void *to, const void *from, size_t n)
|
||||
{
|
||||
memcpy(to, from, n);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int request_microcode_fw(int cpu, struct device *device)
|
||||
{
|
||||
const char *fw_name = "amd-ucode/microcode_amd.bin";
|
||||
const struct firmware *firmware;
|
||||
int ret;
|
||||
|
||||
/* We should bind the task to the CPU */
|
||||
BUG_ON(cpu != raw_smp_processor_id());
|
||||
|
||||
ret = request_firmware(&firmware, fw_name, device);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "microcode: ucode data file %s load failed\n", fw_name);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
|
||||
&get_ucode_fw);
|
||||
|
||||
release_firmware(firmware);
|
||||
|
||||
return error;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int get_ucode_user(void *to, const void *from, size_t n)
|
||||
{
|
||||
return copy_from_user(to, from, n);
|
||||
}
|
||||
|
||||
static int request_microcode_user(int cpu, const void __user *buf, size_t size)
|
||||
{
|
||||
/* We should bind the task to the CPU */
|
||||
BUG_ON(cpu != raw_smp_processor_id());
|
||||
|
||||
return generic_load_microcode(cpu, (void*)buf, size, &get_ucode_user);
|
||||
}
|
||||
|
||||
static void microcode_fini_cpu_amd(int cpu)
|
||||
@ -436,10 +419,8 @@ static void microcode_fini_cpu_amd(int cpu)
|
||||
}
|
||||
|
||||
static struct microcode_ops microcode_amd_ops = {
|
||||
.get_next_ucode = get_next_ucode_amd,
|
||||
.get_matching_microcode = get_matching_microcode_amd,
|
||||
.microcode_sanity_check = NULL,
|
||||
.cpu_request_microcode = cpu_request_microcode_amd,
|
||||
.request_microcode_user = request_microcode_user,
|
||||
.request_microcode_fw = request_microcode_fw,
|
||||
.collect_cpu_info = collect_cpu_info_amd,
|
||||
.apply_microcode = apply_microcode_amd,
|
||||
.microcode_fini_cpu = microcode_fini_cpu_amd,
|
||||
|
||||
@ -155,15 +155,15 @@ static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int microcode_update_match(int cpu_num,
|
||||
struct microcode_header_intel *mc_header, int sig, int pf)
|
||||
static inline int update_match_cpu(struct cpu_signature *csig, int sig, int pf)
|
||||
{
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
||||
return (!sigmatch(sig, csig->sig, pf, csig->pf)) ? 0 : 1;
|
||||
}
|
||||
|
||||
if (!sigmatch(sig, uci->cpu_sig.sig, pf, uci->cpu_sig.pf)
|
||||
|| mc_header->rev <= uci->cpu_sig.rev)
|
||||
return 0;
|
||||
return 1;
|
||||
static inline int
|
||||
update_match_revision(struct microcode_header_intel *mc_header, int rev)
|
||||
{
|
||||
return (mc_header->rev <= rev) ? 0 : 1;
|
||||
}
|
||||
|
||||
static int microcode_sanity_check(void *mc)
|
||||
@ -248,51 +248,36 @@ static int microcode_sanity_check(void *mc)
|
||||
/*
|
||||
* return 0 - no update found
|
||||
* return 1 - found update
|
||||
* return < 0 - error
|
||||
*/
|
||||
static int get_matching_microcode(void *mc, int cpu)
|
||||
static int
|
||||
get_matching_microcode(struct cpu_signature *cpu_sig, void *mc, int rev)
|
||||
{
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
|
||||
struct microcode_header_intel *mc_header = mc;
|
||||
struct extended_sigtable *ext_header;
|
||||
unsigned long total_size = get_totalsize(mc_header);
|
||||
int ext_sigcount, i;
|
||||
struct extended_signature *ext_sig;
|
||||
void *new_mc;
|
||||
|
||||
if (microcode_update_match(cpu, mc_header,
|
||||
mc_header->sig, mc_header->pf))
|
||||
goto find;
|
||||
if (!update_match_revision(mc_header, rev))
|
||||
return 0;
|
||||
|
||||
if (update_match_cpu(cpu_sig, mc_header->sig, mc_header->pf))
|
||||
return 1;
|
||||
|
||||
/* Look for ext. headers: */
|
||||
if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE)
|
||||
return 0;
|
||||
|
||||
ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE;
|
||||
ext_sigcount = ext_header->count;
|
||||
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
|
||||
|
||||
for (i = 0; i < ext_sigcount; i++) {
|
||||
if (microcode_update_match(cpu, mc_header,
|
||||
ext_sig->sig, ext_sig->pf))
|
||||
goto find;
|
||||
if (update_match_cpu(cpu_sig, ext_sig->sig, ext_sig->pf))
|
||||
return 1;
|
||||
ext_sig++;
|
||||
}
|
||||
return 0;
|
||||
find:
|
||||
pr_debug("microcode: CPU%d found a matching microcode update with"
|
||||
" version 0x%x (current=0x%x)\n",
|
||||
cpu, mc_header->rev, uci->cpu_sig.rev);
|
||||
new_mc = vmalloc(total_size);
|
||||
if (!new_mc) {
|
||||
printk(KERN_ERR "microcode: error! Can not allocate memory\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* free previous update file */
|
||||
vfree(uci->mc.mc_intel);
|
||||
|
||||
memcpy(new_mc, mc, total_size);
|
||||
uci->mc.mc_intel = new_mc;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void apply_microcode(int cpu)
|
||||
@ -300,7 +285,7 @@ static void apply_microcode(int cpu)
|
||||
unsigned long flags;
|
||||
unsigned int val[2];
|
||||
int cpu_num = raw_smp_processor_id();
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
|
||||
|
||||
/* We should bind the task to the CPU */
|
||||
BUG_ON(cpu_num != cpu);
|
||||
@ -338,116 +323,105 @@ static void apply_microcode(int cpu)
|
||||
uci->cpu_sig.rev = val[1];
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MICROCODE_OLD_INTERFACE
|
||||
extern void __user *user_buffer; /* user area microcode data buffer */
|
||||
extern unsigned int user_buffer_size; /* it's size */
|
||||
|
||||
static long get_next_ucode(void **mc, long offset)
|
||||
static int generic_load_microcode(int cpu, void *data, size_t size,
|
||||
int (*get_ucode_data)(void *, const void *, size_t))
|
||||
{
|
||||
struct microcode_header_intel mc_header;
|
||||
unsigned long total_size;
|
||||
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
|
||||
u8 *ucode_ptr = data, *new_mc = NULL, *mc;
|
||||
int new_rev = uci->cpu_sig.rev;
|
||||
unsigned int leftover = size;
|
||||
|
||||
/* No more data */
|
||||
if (offset >= user_buffer_size)
|
||||
return 0;
|
||||
if (copy_from_user(&mc_header, user_buffer + offset, MC_HEADER_SIZE)) {
|
||||
printk(KERN_ERR "microcode: error! Can not read user data\n");
|
||||
return -EFAULT;
|
||||
}
|
||||
total_size = get_totalsize(&mc_header);
|
||||
if (offset + total_size > user_buffer_size) {
|
||||
printk(KERN_ERR "microcode: error! Bad total size in microcode "
|
||||
"data file\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
*mc = vmalloc(total_size);
|
||||
if (!*mc)
|
||||
return -ENOMEM;
|
||||
if (copy_from_user(*mc, user_buffer + offset, total_size)) {
|
||||
printk(KERN_ERR "microcode: error! Can not read user data\n");
|
||||
vfree(*mc);
|
||||
return -EFAULT;
|
||||
}
|
||||
return offset + total_size;
|
||||
}
|
||||
#endif
|
||||
while (leftover) {
|
||||
struct microcode_header_intel mc_header;
|
||||
unsigned int mc_size;
|
||||
|
||||
static long get_next_ucode_from_buffer(void **mc, const u8 *buf,
|
||||
unsigned long size, long offset)
|
||||
{
|
||||
struct microcode_header_intel *mc_header;
|
||||
unsigned long total_size;
|
||||
if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header)))
|
||||
break;
|
||||
|
||||
/* No more data */
|
||||
if (offset >= size)
|
||||
return 0;
|
||||
mc_header = (struct microcode_header_intel *)(buf + offset);
|
||||
total_size = get_totalsize(mc_header);
|
||||
mc_size = get_totalsize(&mc_header);
|
||||
if (!mc_size || mc_size > leftover) {
|
||||
printk(KERN_ERR "microcode: error!"
|
||||
"Bad data in microcode data file\n");
|
||||
break;
|
||||
}
|
||||
|
||||
if (offset + total_size > size) {
|
||||
printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
|
||||
return -EINVAL;
|
||||
mc = vmalloc(mc_size);
|
||||
if (!mc)
|
||||
break;
|
||||
|
||||
if (get_ucode_data(mc, ucode_ptr, mc_size) ||
|
||||
microcode_sanity_check(mc) < 0) {
|
||||
vfree(mc);
|
||||
break;
|
||||
}
|
||||
|
||||
if (get_matching_microcode(&uci->cpu_sig, mc, new_rev)) {
|
||||
new_rev = mc_header.rev;
|
||||
new_mc = mc;
|
||||
} else
|
||||
vfree(mc);
|
||||
|
||||
ucode_ptr += mc_size;
|
||||
leftover -= mc_size;
|
||||
}
|
||||
|
||||
*mc = vmalloc(total_size);
|
||||
if (!*mc) {
|
||||
printk(KERN_ERR "microcode: error! Can not allocate memory\n");
|
||||
return -ENOMEM;
|
||||
if (new_mc) {
|
||||
if (!leftover) {
|
||||
if (uci->mc.mc_intel)
|
||||
vfree(uci->mc.mc_intel);
|
||||
uci->mc.mc_intel = (struct microcode_intel *)new_mc;
|
||||
pr_debug("microcode: CPU%d found a matching microcode update with"
|
||||
" version 0x%x (current=0x%x)\n",
|
||||
cpu, uci->mc.mc_intel->hdr.rev, uci->cpu_sig.rev);
|
||||
} else
|
||||
vfree(new_mc);
|
||||
}
|
||||
memcpy(*mc, buf + offset, total_size);
|
||||
return offset + total_size;
|
||||
|
||||
return (int)leftover;
|
||||
}
|
||||
|
||||
/* fake device for request_firmware */
|
||||
extern struct platform_device *microcode_pdev;
|
||||
static int get_ucode_fw(void *to, const void *from, size_t n)
|
||||
{
|
||||
memcpy(to, from, n);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cpu_request_microcode(int cpu)
|
||||
static int request_microcode_fw(int cpu, struct device *device)
|
||||
{
|
||||
char name[30];
|
||||
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
||||
const struct firmware *firmware;
|
||||
const u8 *buf;
|
||||
unsigned long size;
|
||||
long offset = 0;
|
||||
int error;
|
||||
void *mc;
|
||||
int ret;
|
||||
|
||||
/* We should bind the task to the CPU */
|
||||
BUG_ON(cpu != raw_smp_processor_id());
|
||||
sprintf(name, "intel-ucode/%02x-%02x-%02x",
|
||||
c->x86, c->x86_model, c->x86_mask);
|
||||
error = request_firmware(&firmware, name, µcode_pdev->dev);
|
||||
if (error) {
|
||||
ret = request_firmware(&firmware, name, device);
|
||||
if (ret) {
|
||||
pr_debug("microcode: data file %s load failed\n", name);
|
||||
return error;
|
||||
return ret;
|
||||
}
|
||||
buf = firmware->data;
|
||||
size = firmware->size;
|
||||
while ((offset = get_next_ucode_from_buffer(&mc, buf, size, offset))
|
||||
> 0) {
|
||||
error = microcode_sanity_check(mc);
|
||||
if (error)
|
||||
break;
|
||||
error = get_matching_microcode(mc, cpu);
|
||||
if (error < 0)
|
||||
break;
|
||||
/*
|
||||
* It's possible the data file has multiple matching ucode,
|
||||
* lets keep searching till the latest version
|
||||
*/
|
||||
if (error == 1) {
|
||||
apply_microcode(cpu);
|
||||
error = 0;
|
||||
}
|
||||
vfree(mc);
|
||||
}
|
||||
if (offset > 0)
|
||||
vfree(mc);
|
||||
if (offset < 0)
|
||||
error = offset;
|
||||
|
||||
ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
|
||||
&get_ucode_fw);
|
||||
|
||||
release_firmware(firmware);
|
||||
|
||||
return error;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int get_ucode_user(void *to, const void *from, size_t n)
|
||||
{
|
||||
return copy_from_user(to, from, n);
|
||||
}
|
||||
|
||||
static int request_microcode_user(int cpu, const void __user *buf, size_t size)
|
||||
{
|
||||
/* We should bind the task to the CPU */
|
||||
BUG_ON(cpu != raw_smp_processor_id());
|
||||
|
||||
return generic_load_microcode(cpu, (void*)buf, size, &get_ucode_user);
|
||||
}
|
||||
|
||||
static void microcode_fini_cpu(int cpu)
|
||||
@ -459,10 +433,8 @@ static void microcode_fini_cpu(int cpu)
|
||||
}
|
||||
|
||||
static struct microcode_ops microcode_intel_ops = {
|
||||
.get_next_ucode = get_next_ucode,
|
||||
.get_matching_microcode = get_matching_microcode,
|
||||
.microcode_sanity_check = microcode_sanity_check,
|
||||
.cpu_request_microcode = cpu_request_microcode,
|
||||
.request_microcode_user = request_microcode_user,
|
||||
.request_microcode_fw = request_microcode_fw,
|
||||
.collect_cpu_info = collect_cpu_info,
|
||||
.apply_microcode = apply_microcode,
|
||||
.microcode_fini_cpu = microcode_fini_cpu,
|
||||
|
||||
@ -5,17 +5,16 @@ extern int microcode_init(void *opaque, struct module *module);
|
||||
extern void microcode_exit(void);
|
||||
|
||||
struct cpu_signature;
|
||||
struct device;
|
||||
|
||||
struct microcode_ops {
|
||||
long (*get_next_ucode)(void **mc, long offset);
|
||||
long (*microcode_get_next_ucode)(void **mc, long offset);
|
||||
int (*get_matching_microcode)(void *mc, int cpu);
|
||||
int (*microcode_sanity_check)(void *mc);
|
||||
int (*cpu_request_microcode)(int cpu);
|
||||
int (*collect_cpu_info)(int cpu_num, struct cpu_signature *csig);
|
||||
void (*apply_microcode)(int cpu);
|
||||
void (*microcode_fini_cpu)(int cpu);
|
||||
void (*clear_patch)(void *data);
|
||||
int (*request_microcode_user) (int cpu, const void __user *buf, size_t size);
|
||||
int (*request_microcode_fw) (int cpu, struct device *device);
|
||||
|
||||
void (*apply_microcode) (int cpu);
|
||||
|
||||
int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
|
||||
void (*microcode_fini_cpu) (int cpu);
|
||||
};
|
||||
|
||||
struct microcode_header_intel {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user