Hi Jordan,
Thank you for this, SMMUv3 and virtio-iommu need these SVA patches as well.
On 21/02/18 22:59, Jordan Crouse wrote:
[...]> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index e2c49e583d8d..e998389cf195 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -110,8 +110,17 @@ struct iommu_domain {
> struct list_head mm_list;
> };
>
> +enum iommu_io_type {
> + IO_TYPE_MM,
> +};
> +
> +struct io_base {
> + int type;
> + int pasid;
> +};
"io_base" is a bit vague. I'm bad at naming so my opinion doesn't hold
much water, but I'd rather this be something like "io_mm_base". When I
initially toyed with the idea I intended to keep io_mm as parent structure
and have "private" and "shared" sub-structures. Even if private PASIDs
don't rely on the kernel mm subsystem, this structure would still
represent an I/O mm of sorts, with a pgd and pgtable info.
Thanks,
Jean
> +
> struct io_mm {
> - int pasid;
> + struct io_base base;
> struct list_head devices;
> struct kref kref;
> #if defined(CONFIG_MMU_NOTIFIER)
>
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