# Re: \[PATCH\] powerpc: Fix 460EX/460GT machine check handling

- From: Benjamin Herrenschmidt \<benh@kernel.crashing.org\>
- Date: 2008-11-12 11:50:51 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2008/11/9447533
- Thread: https://ratatoskr.run/linuxppc-dev/2008/11/9447522/t.md

```text
On Wed, 2008-11-12 at 06:27 -0500, Josh Boyer wrote:
> On Wed, 12 Nov 2008 13:02:43 +1100
> Benjamin Herrenschmidt [ref] wrote:
> 
> > Those cores use the 440A type machine check (ie, they have
> > MCSRR0/MCSRR1). They thus need to call the appropriate fixup
> > function to hook the right variant of the exception.
> > 
> > Without this, all machine checks become fatal due to loss
> > of context when entering the exception handler.
> 
> Looks fine to me.  However, what machine checks were you getting that
> caused you to see this that aren't fatal anyway?

PCI aborts from userspace when toying with video card POSTing &
x86emu :-)

Cheers,
Ben.
```