[Qemu-devel] [PATCH v2 2/6] hw/intc: arm_gic_kvm.c restore config first

[Greg Bellows]

On Wed, Mar 4, 2015 at 8:35 AM, Alex Bennée <alex.bennee at linaro.org> wrote:
> As there is logic to deal with the difference between edge and level
> triggered interrupts in the kernel we must ensure it knows the
> configuration of the IRQs before we restore the pending state.
>
> Signed-off-by: Alex Bennée <alex.bennee at linaro.org>
> Acked-by: Christoffer Dall <christoffer.dall at linaro.org>
>
> diff --git a/hw/intc/arm_gic_kvm.c b/hw/intc/arm_gic_kvm.c
> index 1ad3eb0..2f21ae7 100644
> --- a/hw/intc/arm_gic_kvm.c
> +++ b/hw/intc/arm_gic_kvm.c
> @@ -370,6 +370,11 @@ static void kvm_arm_gic_put(GICState *s)
>       * the appropriate CPU interfaces in the kernel) */
>      kvm_dist_put(s, 0x800, 8, s->num_irq, translate_targets);
>
> +    /* irq_state[n].trigger -> GICD_ICFGRn
> +     * (restore targets before pending IRQs so we treat level/edge
> +     * correctly */
> +    kvm_dist_put(s, 0xc00, 2, s->num_irq, translate_trigger);
> +
>      /* irq_state[n].pending + irq_state[n].level -> GICD_ISPENDRn */
>      kvm_dist_put(s, 0x280, 1, s->num_irq, translate_clear);
>      kvm_dist_put(s, 0x200, 1, s->num_irq, translate_pending);
> @@ -378,8 +383,6 @@ static void kvm_arm_gic_put(GICState *s)
>      kvm_dist_put(s, 0x380, 1, s->num_irq, translate_clear);
>      kvm_dist_put(s, 0x300, 1, s->num_irq, translate_active);
>
> -    /* irq_state[n].trigger -> GICD_ICFRn */
> -    kvm_dist_put(s, 0xc00, 2, s->num_irq, translate_trigger);
>
>      /* s->priorityX[irq] -> ICD_IPRIORITYRn */
>      kvm_dist_put(s, 0x400, 8, s->num_irq, translate_priority);
> --
> 2.3.1
>
>

Reviewed-by: Greg Bellows <greg.bellows at linaro.org>