> I agree that we should let a device driver enable SVA if it supports some
> form of IOPF.
Right, The PCIe device has capability to handle IO page faults on its own when
ATS translation request response indicates that no valid mapping exist.
SMMU doesn't involve/handle page faults for ATS
Hi,
On Tue, Dec 15, 2020 at 01:09:29AM +, Krishna Reddy wrote:
> Hi Jean,
>
> > +bool arm_smmu_master_sva_supported(struct arm_smmu_master *master) {
> > + if (!(master->smmu->features & ARM_SMMU_FEAT_SVA))
> > + return false;
> +
> > + /* SSID and IOPF support are
Hi Jean,
> +bool arm_smmu_master_sva_supported(struct arm_smmu_master *master) {
> + if (!(master->smmu->features & ARM_SMMU_FEAT_SVA))
> + return false;
+
> + /* SSID and IOPF support are mandatory for the moment */
> + return master->ssid_bits &&
