> -----Original Message-----
> From: Zhangfei Gao <[email protected]>
> Sent: 17 October 2025 09:49
> To: Shameer Kolothum <[email protected]>
> Cc: [email protected]; [email protected];
> [email protected]; [email protected]; Jason Gunthorpe
> <[email protected]>; Nicolin Chen <[email protected]>; [email protected];
> [email protected]; Nathan Chen <[email protected]>; Matt Ochs
> <[email protected]>; [email protected]; [email protected];
> [email protected]; [email protected];
> [email protected]; [email protected];
> [email protected]
> Subject: Re: [PATCH v4 21/27] hw/arm/smmuv3-accel: Add a property to
> specify RIL support
>
> External email: Use caution opening links or attachments
>
>
> On Mon, 29 Sept 2025 at 21:40, Shameer Kolothum
> <[email protected]> wrote:
> >
> > Currently QEMU SMMUv3 has RIL support by default. But if accelerated
> > mode is enabled, RIL has to be compatible with host SMMUv3 support.
> >
> > Add a property so that the user can specify this.
> >
> > Signed-off-by: Shameer Kolothum <[email protected]>
>
> If ril=off is not specified, the guest kernel will not boot up, is this
> expected?
>
> Fail with log:
> qemu-system-aarch64: -device
> vfio-pci,host=0000:75:00.1,bus=pcie.0,iommufd=iommufd0:
> vfio 0000:75:00.1: Failed to set vIOMMU: Host SUMMUv3 differs in Range
> Invalidation support
It will, if the host SMMUv3 doesn't have RIL. Please check that.
This is because when a device is attached to vSMMU , a compatibility check
is performed to ensure that the SMUUv3 features visible to guest are compatible
with host SMMUv3 it is tied to. By default, QEMU SMMUV3 reports RIL to Guest.
The "ril" option is provided so that user can specify this in case
incompatibility.
Thanks,
Shameer
