Re: [PATCH 1/4] Add support for 750CL Holly board

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Fri, 2007-05-04 at 21:44 +0200, Arnd Bergmann wrote:

> > +void holly_show_cpuinfo(struct seq_file *m)
> > +{
> > +	seq_printf(m, "vendor\t\t: IBM\n");
> > +	seq_printf(m, "machine\t\t: PPC750 GX/CL\n");
> > +}
> 
> If it's an IBM product, it should come with a product code like 123-4567,
> which fits in here, instead of just listing the CPU.

Should probably come from the device tree anyway.

> > +static int ppc750_machine_check_exception(struct pt_regs *regs)
> > +{
> > +	extern void tsi108_clear_pci_cfg_error(void);
> 
> move declaration to header file.
> 
> > +	const struct exception_table_entry *entry;
> > +
> > +	/* Are we prepared to handle this fault */
> > +	if ((entry = search_exception_tables(regs->nip)) != NULL) {
> > +		tsi108_clear_pci_cfg_error();
> > +		regs->msr |= MSR_RI;
> > +		regs->nip = entry->fixup;
> > +		return 1;
> > +	}
> > +	return 0;
> > +}
> 
> Are you sure that you can use the generic exception table mechanism
> like this? I can't see why it doesn't work, but it's something I haven't
> seen anyone do like this.

Also, can't the TSI be configured to not generate MCE in that case ?