Re: [patch V2 24/46] PCI: vmd: Mark VMD irqdomain with DOMAIN_BUS_VMD_MSI

[Marc Zyngier]

On Wed, 26 Aug 2020 12:16:52 +0100,
Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> 
> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> 
> Devices on the VMD bus use their own MSI irq domain, but it is not
> distinguishable from regular PCI/MSI irq domains. This is required
> to exclude VMD devices from getting the irq domain pointer set by
> interrupt remapping.
> 
> Override the default bus token.
> 
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> ---
>  drivers/pci/controller/vmd.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> --- a/drivers/pci/controller/vmd.c
> +++ b/drivers/pci/controller/vmd.c
> @@ -579,6 +579,12 @@ static int vmd_enable_domain(struct vmd_
>  		return -ENODEV;
>  	}
>  
> +	/*
> +	 * Override the irq domain bus token so the domain can be distinguished
> +	 * from a regular PCI/MSI domain.
> +	 */
> +	irq_domain_update_bus_token(vmd->irq_domain, DOMAIN_BUS_VMD_MSI);
> +

One day, we'll be able to set the token at domain creation time. In
the meantime,

Acked-by: Marc Zyngier <maz@xxxxxxxxxx>

	M.

-- 
Without deviation from the norm, progress is not possible.