Re: [PATCH 08/13] powerpc/64s: irq replay remove spurious irq reason

[Benjamin Herrenschmidt <benh@au1.ibm.com>]

On Sun, 2017-08-06 at 03:02 +1000, Nicholas Piggin wrote:
> HVI interrupts have always used 0x500, so remove the dead branch.

Maybe we should fix that and "catch" in incorrect entry via 0x500
which would mean the XIVE is trying to deliver guest irqs to the OS...

That can happen if some LPCR bits aren't set properly and/or KVM
doesn't pull the guest in time. I had bugs like that in my early
dev so I've been running with a b . at 0x500 for a while :-)

> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
>  arch/powerpc/kernel/exceptions-64s.S | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
> index 29253cecf713..566cf126c13b 100644
> --- a/arch/powerpc/kernel/exceptions-64s.S
> +++ b/arch/powerpc/kernel/exceptions-64s.S
> @@ -1680,8 +1680,6 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_300)
>  BEGIN_FTR_SECTION
>  	cmpwi	r3,0xa00
>  	beq	h_doorbell_common_msgclr
> -	cmpwi	r3,0xea0
> -	beq	h_virt_irq_common
>  	cmpwi	r3,0xe60
>  	beq	hmi_exception_common
>  FTR_SECTION_ELSE