Re: [Xen-devel] [PATCH v3 35/39] ARM: new VGIC: Add vgic_v2_enable

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 21 Mar 2018, Andre Przywara wrote:
> Enable the VGIC operation by properly initialising the registers
> in the hypervisor GIC interface.
> 
> This is based on Linux commit f7b6985cc3d0, written by Eric Auger.
> 
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
> Acked-by: Julien Grall <julien.grall@xxxxxxx>

Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
> Changelog v2 ... v3:
> - replace "1" with "true" in boolean parameter
> 
> Changelog v1 ... v2:
> - move patch from later part in the series
> 
>  xen/arch/arm/vgic/vgic-v2.c | 6 ++++++
>  xen/arch/arm/vgic/vgic.h    | 1 +
>  2 files changed, 7 insertions(+)
> 
> diff --git a/xen/arch/arm/vgic/vgic-v2.c b/xen/arch/arm/vgic/vgic-v2.c
> index 8ab0cfe81d..ce77e58857 100644
> --- a/xen/arch/arm/vgic/vgic-v2.c
> +++ b/xen/arch/arm/vgic/vgic-v2.c
> @@ -229,6 +229,12 @@ void vgic_v2_populate_lr(struct vcpu *vcpu, struct 
> vgic_irq *irq, int lr)
>      gic_hw_ops->write_lr(lr, &lr_val);
>  }
>  
> +void vgic_v2_enable(struct vcpu *vcpu)
> +{
> +    /* Get the show on the road... */
> +    gic_hw_ops->update_hcr_status(GICH_HCR_EN, true);
> +}
> +
>  /*
>   * Local variables:
>   * mode: C
> diff --git a/xen/arch/arm/vgic/vgic.h b/xen/arch/arm/vgic/vgic.h
> index a3fcd4d965..112952fbf9 100644
> --- a/xen/arch/arm/vgic/vgic.h
> +++ b/xen/arch/arm/vgic/vgic.h
> @@ -66,6 +66,7 @@ void vgic_sync_hardware_irq(struct domain *d,
>  void vgic_v2_fold_lr_state(struct vcpu *vcpu);
>  void vgic_v2_populate_lr(struct vcpu *vcpu, struct vgic_irq *irq, int lr);
>  void vgic_v2_set_underflow(struct vcpu *vcpu);
> +void vgic_v2_enable(struct vcpu *vcpu);
>  int vgic_register_dist_iodev(struct domain *d, gfn_t dist_base_fn,
>                               enum vgic_type);
>  
> -- 
> 2.14.1
> 

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