Re: [Xen-devel] [PATCH 3/6] xen/arm: gic: Use bool instead of uint8_t for the hw_status in gic_lr

[Andre Przywara <andre.przywara@xxxxxxx>]

Hi,

On 09/03/18 16:35, julien.grall@xxxxxxx wrote:
> From: Julien Grall <julien.grall@xxxxxxx>
> 
> hw_status can only be 1 or 0. So convert to a bool.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Reviewed-by: Andre Przywara <andre.przywara@xxxxxxx>

Cheers,
Andre.

> ---
>  xen/arch/arm/gic-v2.c     | 9 +++++----
>  xen/arch/arm/gic-v3.c     | 8 +++++---
>  xen/include/asm-arm/gic.h | 2 +-
>  3 files changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/xen/arch/arm/gic-v2.c b/xen/arch/arm/gic-v2.c
> index fc105c08b8..23223575a2 100644
> --- a/xen/arch/arm/gic-v2.c
> +++ b/xen/arch/arm/gic-v2.c
> @@ -468,7 +468,7 @@ static void gicv2_read_lr(int lr, struct gic_lr *lr_reg)
>      lr_reg->virq = (lrv >> GICH_V2_LR_VIRTUAL_SHIFT) & 
> GICH_V2_LR_VIRTUAL_MASK;
>      lr_reg->priority = (lrv >> GICH_V2_LR_PRIORITY_SHIFT) & 
> GICH_V2_LR_PRIORITY_MASK;
>      lr_reg->state     = (lrv >> GICH_V2_LR_STATE_SHIFT) & 
> GICH_V2_LR_STATE_MASK;
> -    lr_reg->hw_status = (lrv >> GICH_V2_LR_HW_SHIFT) & GICH_V2_LR_HW_MASK;
> +    lr_reg->hw_status = (lrv & GICH_V2_LR_HW) == GICH_V2_LR_HW;
>  }
>  
>  static void gicv2_write_lr(int lr, const struct gic_lr *lr_reg)
> @@ -480,9 +480,10 @@ static void gicv2_write_lr(int lr, const struct gic_lr 
> *lr_reg)
>            ((uint32_t)(lr_reg->priority & GICH_V2_LR_PRIORITY_MASK)
>                                        << GICH_V2_LR_PRIORITY_SHIFT) |
>            ((uint32_t)(lr_reg->state & GICH_V2_LR_STATE_MASK)
> -                                   << GICH_V2_LR_STATE_SHIFT) |
> -          ((uint32_t)(lr_reg->hw_status & GICH_V2_LR_HW_MASK)
> -                                       << GICH_V2_LR_HW_SHIFT));
> +                                   << GICH_V2_LR_STATE_SHIFT) );
> +
> +    if ( lr_reg->hw_status )
> +        lrv |= GICH_V2_LR_HW;
>  
>      writel_gich(lrv, GICH_LR + lr * 4);
>  }
> diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
> index 0dfa1a1e08..0711e509a6 100644
> --- a/xen/arch/arm/gic-v3.c
> +++ b/xen/arch/arm/gic-v3.c
> @@ -1011,7 +1011,7 @@ static void gicv3_read_lr(int lr, struct gic_lr *lr_reg)
>  
>      lr_reg->priority  = (lrv >> ICH_LR_PRIORITY_SHIFT) & 
> ICH_LR_PRIORITY_MASK;
>      lr_reg->state     = (lrv >> ICH_LR_STATE_SHIFT) & ICH_LR_STATE_MASK;
> -    lr_reg->hw_status = (lrv >> ICH_LR_HW_SHIFT) & ICH_LR_HW_MASK;
> +    lr_reg->hw_status = (lrv & ICH_LR_HW) == ICH_LR_HW;
>  }
>  
>  static void gicv3_write_lr(int lr_reg, const struct gic_lr *lr)
> @@ -1021,8 +1021,10 @@ static void gicv3_write_lr(int lr_reg, const struct 
> gic_lr *lr)
>      lrv = ( ((u64)(lr->pirq & ICH_LR_PHYSICAL_MASK) << 
> ICH_LR_PHYSICAL_SHIFT)|
>          ((u64)(lr->virq & ICH_LR_VIRTUAL_MASK)  << ICH_LR_VIRTUAL_SHIFT) |
>          ((u64)(lr->priority & ICH_LR_PRIORITY_MASK) << 
> ICH_LR_PRIORITY_SHIFT)|
> -        ((u64)(lr->state & ICH_LR_STATE_MASK) << ICH_LR_STATE_SHIFT) |
> -        ((u64)(lr->hw_status & ICH_LR_HW_MASK) << ICH_LR_HW_SHIFT) );
> +        ((u64)(lr->state & ICH_LR_STATE_MASK) << ICH_LR_STATE_SHIFT) );
> +
> +    if ( lr->hw_status )
> +        lrv |= ICH_LR_HW;
>  
>      /*
>       * When the guest is using vGICv3, all the IRQs are Group 1. Group 0
> diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
> index 1eb08b856e..daec51499c 100644
> --- a/xen/include/asm-arm/gic.h
> +++ b/xen/include/asm-arm/gic.h
> @@ -210,7 +210,7 @@ struct gic_lr {
>     uint32_t virq;
>     uint8_t priority;
>     uint8_t state;
> -   uint8_t hw_status;
> +   bool hw_status;
>  };
>  
>  enum gic_version {
> 

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