diff options
Diffstat (limited to 'arch/x86/kernel/cpu/mcheck/mce.c')
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce.c | 53 |
1 files changed, 36 insertions, 17 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index fce51ad1f362..2af127d4c3d1 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -36,8 +36,8 @@ #include <linux/fs.h> #include <linux/mm.h> #include <linux/debugfs.h> -#include <linux/edac_mce.h> #include <linux/irq_work.h> +#include <linux/export.h> #include <asm/processor.h> #include <asm/mce.h> @@ -144,23 +144,20 @@ static struct mce_log mcelog = { void mce_log(struct mce *mce) { unsigned next, entry; + int ret = 0; /* Emit the trace record: */ trace_mce_record(mce); + ret = atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, mce); + if (ret == NOTIFY_STOP) + return; + mce->finished = 0; wmb(); for (;;) { entry = rcu_dereference_check_mce(mcelog.next); for (;;) { - /* - * If edac_mce is enabled, it will check the error type - * and will process it, if it is a known error. - * Otherwise, the error will be sent through mcelog - * interface - */ - if (edac_mce_parse(mce)) - return; /* * When the buffer fills up discard new entries. @@ -217,8 +214,13 @@ static void print_mce(struct mce *m) pr_cont("MISC %llx ", m->misc); pr_cont("\n"); - pr_emerg(HW_ERR "PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x\n", - m->cpuvendor, m->cpuid, m->time, m->socketid, m->apicid); + /* + * Note this output is parsed by external tools and old fields + * should not be changed. + */ + pr_emerg(HW_ERR "PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x microcode %x\n", + m->cpuvendor, m->cpuid, m->time, m->socketid, m->apicid, + cpu_data(m->extcpu).microcode); /* * Print out human-readable details about the MCE error, @@ -551,10 +553,8 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) * Don't get the IP here because it's unlikely to * have anything to do with the actual error location. */ - if (!(flags & MCP_DONTLOG) && !mce_dont_log_ce) { + if (!(flags & MCP_DONTLOG) && !mce_dont_log_ce) mce_log(&m); - atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, &m); - } /* * Clear state for this bank. @@ -1634,16 +1634,35 @@ static long mce_chrdev_ioctl(struct file *f, unsigned int cmd, } } -/* Modified in mce-inject.c, so not static or const */ -struct file_operations mce_chrdev_ops = { +static ssize_t (*mce_write)(struct file *filp, const char __user *ubuf, + size_t usize, loff_t *off); + +void register_mce_write_callback(ssize_t (*fn)(struct file *filp, + const char __user *ubuf, + size_t usize, loff_t *off)) +{ + mce_write = fn; +} +EXPORT_SYMBOL_GPL(register_mce_write_callback); + +ssize_t mce_chrdev_write(struct file *filp, const char __user *ubuf, + size_t usize, loff_t *off) +{ + if (mce_write) + return mce_write(filp, ubuf, usize, off); + else + return -EINVAL; +} + +static const struct file_operations mce_chrdev_ops = { .open = mce_chrdev_open, .release = mce_chrdev_release, .read = mce_chrdev_read, + .write = mce_chrdev_write, .poll = mce_chrdev_poll, .unlocked_ioctl = mce_chrdev_ioctl, .llseek = no_llseek, }; -EXPORT_SYMBOL_GPL(mce_chrdev_ops); static struct miscdevice mce_chrdev_device = { MISC_MCELOG_MINOR, |