Re: [Xen-devel] [PATCH] xen: arm: take FIQ exceptoons to Xen not guest by setting HCR_EL2.FMO

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Mon, 16 Jun 2014, Ian Campbell wrote:
> So far none of the platforms which we support use FIQ for anything, but when 
> we
> end up supporting one it would be far better to surprise Xen with them than
> whatever guest happens to be running...
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>

>  xen/arch/arm/traps.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
> index 333d5c0..88292a5 100644
> --- a/xen/arch/arm/traps.c
> +++ b/xen/arch/arm/traps.c
> @@ -89,8 +89,8 @@ void __cpuinit init_traps(void)
>                   CPTR_EL2);
>  
>      /* Setup hypervisor traps */
> -    
> WRITE_SYSREG(HCR_PTW|HCR_BSU_INNER|HCR_AMO|HCR_IMO|HCR_VM|HCR_TWI|HCR_TSC|
> -                 HCR_TAC|HCR_SWIO|HCR_TIDCP, HCR_EL2);
> +    WRITE_SYSREG(HCR_PTW|HCR_BSU_INNER|HCR_AMO|HCR_IMO|HCR_FMO|HCR_VM|
> +                 HCR_TWI|HCR_TSC|HCR_TAC|HCR_SWIO|HCR_TIDCP, HCR_EL2);
>      isb();
>  }
>  
> -- 
> 1.7.10.4
> 

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