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| author | Corey Minyard <cminyard@mvista.com> | 2017-11-02 17:19:15 +0100 |
|---|---|---|
| committer | Corey Minyard <cminyard@mvista.com> | 2017-11-02 17:19:15 +0100 |
| commit | 6297fabd93f93182245383ba7de56bef829a796b (patch) | |
| tree | 804f5d28ada61b402d56281c9a047308d26347f4 /arch/powerpc/kernel/mce_power.c | |
| parent | ipmi_si: Delete an error message for a failed memory allocation in try_smi_in... (diff) | |
| parent | module: Do not paper over type mismatches in module_param_call() (diff) | |
| download | linux-6297fabd93f93182245383ba7de56bef829a796b.tar.xz linux-6297fabd93f93182245383ba7de56bef829a796b.zip | |
Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux into for-next
The IPMI SI driver was split into different pieces, merge the module
tree to accountfor that.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Diffstat (limited to 'arch/powerpc/kernel/mce_power.c')
| -rw-r--r-- | arch/powerpc/kernel/mce_power.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c index b76ca198e09c..72f153c6f3fa 100644 --- a/arch/powerpc/kernel/mce_power.c +++ b/arch/powerpc/kernel/mce_power.c @@ -624,5 +624,18 @@ long __machine_check_early_realmode_p8(struct pt_regs *regs) long __machine_check_early_realmode_p9(struct pt_regs *regs) { + /* + * On POWER9 DD2.1 and below, it's possible to get a machine check + * caused by a paste instruction where only DSISR bit 25 is set. This + * will result in the MCE handler seeing an unknown event and the kernel + * crashing. An MCE that occurs like this is spurious, so we don't need + * to do anything in terms of servicing it. If there is something that + * needs to be serviced, the CPU will raise the MCE again with the + * correct DSISR so that it can be serviced properly. So detect this + * case and mark it as handled. + */ + if (SRR1_MC_LOADSTORE(regs->msr) && regs->dsisr == 0x02000000) + return 1; + return mce_handle_error(regs, mce_p9_derror_table, mce_p9_ierror_table); } |