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SubjectRe: [patch V2 24/46] PCI: vmd: Mark VMD irqdomain with DOMAIN_BUS_VMD_MSI
On Wed, 26 Aug 2020 12:16:52 +0100,
Thomas Gleixner <tglx@linutronix.de> wrote:
>
> From: Thomas Gleixner <tglx@linutronix.de>
>
> 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@linutronix.de>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
> ---
> 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@kernel.org>

M.

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

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