Hello Markos,
Markos Chandras wrote on 2013-10-08:
> From: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>
>
> An NMI exception delivered from YAMON delivers the PC in ErrorPC
> instead of EPC. It's also necessary to clear the Status.BEV
> bit for the page fault exception handler to work properly.
>
> Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>
> Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
> ---
> @@ -1506,10 +1511,14 @@ int register_nmi_notifier(struct notifier_block
> *nb)
>
> void __noreturn nmi_exception_handler(struct pt_regs *regs)
> {
> + char str[100];
> +
> raw_notifier_call_chain(&nmi_chain, 0, regs);
> bust_spinlocks(1);
> - printk("NMI taken!!!!\n");
> - die("NMI", regs);
> + snprintf(str, 100, "CPU%d NMI taken, CP0_EPC=%lx\n",
> + smp_processor_id(), regs->cp0_epc);
> + regs->cp0_epc = read_c0_errorepc();
If this is a YAMON specific fix, why is it done in a common file?
> + die(str, regs);
> }
>
> #define VECTORSPACING 0x100 /* for EI/VI mode */
Best Regards,
Thomas
