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| author | Tony Luck <tony.luck@intel.com> | 2020-02-14 14:27:17 -0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-04-14 15:59:26 +0200 |
| commit | 23ba710a0864108910c7531dc4c73ef65eca5568 (patch) | |
| tree | d5875a88dffb875229136fed490ad8367a108fdc /arch | |
| parent | 1de08dccd383482a3e88845d3554094d338f5ff9 (diff) | |
| download | linux-stable-23ba710a0864108910c7531dc4c73ef65eca5568.tar.gz linux-stable-23ba710a0864108910c7531dc4c73ef65eca5568.tar.bz2 linux-stable-23ba710a0864108910c7531dc4c73ef65eca5568.zip | |
x86/mce: Fix all mce notifiers to update the mce->kflags bitmask
If the handler took any action to log or deal with the error, set a bit
in mce->kflags so that the default handler on the end of the machine
check chain can see what has been done.
Get rid of NOTIFY_STOP returns. Make the EDAC and dev-mcelog handlers
skip over errors already processed by CEC.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20200214222720.13168-5-tony.luck@intel.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/mce/core.c | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mce/dev-mcelog.c | 5 |
2 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index b033b3589630..5666a48a4bc9 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -581,8 +581,10 @@ static int uc_decode_notifier(struct notifier_block *nb, unsigned long val, return NOTIFY_DONE; pfn = mce->addr >> PAGE_SHIFT; - if (!memory_failure(pfn, 0)) + if (!memory_failure(pfn, 0)) { set_mce_nospec(pfn); + mce->kflags |= MCE_HANDLED_UC; + } return NOTIFY_OK; } diff --git a/arch/x86/kernel/cpu/mce/dev-mcelog.c b/arch/x86/kernel/cpu/mce/dev-mcelog.c index d089567a9ce8..c033e7ea9e3c 100644 --- a/arch/x86/kernel/cpu/mce/dev-mcelog.c +++ b/arch/x86/kernel/cpu/mce/dev-mcelog.c @@ -39,6 +39,9 @@ static int dev_mce_log(struct notifier_block *nb, unsigned long val, struct mce *mce = (struct mce *)data; unsigned int entry; + if (mce->kflags & MCE_HANDLED_CEC) + return NOTIFY_DONE; + mutex_lock(&mce_chrdev_read_mutex); entry = mcelog->next; @@ -56,6 +59,7 @@ static int dev_mce_log(struct notifier_block *nb, unsigned long val, memcpy(mcelog->entry + entry, mce, sizeof(struct mce)); mcelog->entry[entry].finished = 1; + mcelog->entry[entry].kflags = 0; /* wake processes polling /dev/mcelog */ wake_up_interruptible(&mce_chrdev_wait); @@ -63,6 +67,7 @@ static int dev_mce_log(struct notifier_block *nb, unsigned long val, unlock: mutex_unlock(&mce_chrdev_read_mutex); + mce->kflags |= MCE_HANDLED_MCELOG; return NOTIFY_OK; } |