The sva_bind() function allows devices to access process address spaces
using a PASID (aka SSID).
(1) bind() allocates or gets an existing MMU notifier tied to the
(domain, mm) pair. Each mm gets one PASID.
(2) Any change to the address space calls invalidate_range() which sends
ATC inval
Hi Jean,
A couple question on how SMMU handles CD.v and translation disable.
On Thu, 30 Apr 2020 16:34:16 +0200
Jean-Philippe Brucker wrote:
> The sva_bind() function allows devices to access process address
> spaces using a PASID (aka SSID).
>
> (1) bind() allocates or gets an existing MMU no
> @@ -432,6 +432,7 @@ config ARM_SMMU_V3
> tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
> depends on ARM64
> select IOMMU_API
> + select IOMMU_SVA
> select IOMMU_IO_PGTABLE_LPAE
> select GENERIC_MSI_IRQ_DOMAIN
Doesn't this need to select MMU_NOTIFIER
On Fri, May 01, 2020 at 05:15:52AM -0700, Christoph Hellwig wrote:
> > @@ -432,6 +432,7 @@ config ARM_SMMU_V3
> > tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
> > depends on ARM64
> > select IOMMU_API
> > + select IOMMU_SVA
> > select IOMMU_IO_PGTABLE_LPAE
> > sel
On Fri, May 01, 2020 at 05:15:52AM -0700, Christoph Hellwig wrote:
> > @@ -432,6 +432,7 @@ config ARM_SMMU_V3
> > tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
> > depends on ARM64
> > select IOMMU_API
> > + select IOMMU_SVA
> > select IOMMU_IO_PGTABLE_LPAE
> > sel
On Fri, May 01, 2020 at 09:55:13AM -0300, Jason Gunthorpe wrote:
> On Fri, May 01, 2020 at 05:15:52AM -0700, Christoph Hellwig wrote:
> > > @@ -432,6 +432,7 @@ config ARM_SMMU_V3
> > > tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
> > > depends on ARM64
> > > select IOMMU_API
> >
On Thu, Apr 30, 2020 at 02:16:17PM -0700, Jacob Pan wrote:
> > +static void arm_smmu_mm_invalidate_range(struct mmu_notifier *mn,
> > +struct mm_struct *mm,
> > +unsigned long start,
> > unsigned long end) +{
> > + /* TODO: i
On Mon, 4 May 2020 18:43:51 +0200
Jean-Philippe Brucker wrote:
> On Thu, Apr 30, 2020 at 02:16:17PM -0700, Jacob Pan wrote:
> > > +static void arm_smmu_mm_invalidate_range(struct mmu_notifier *mn,
> > > + struct mm_struct *mm,
> > > +
On Mon, May 04, 2020 at 01:47:23PM -0700, Jacob Pan wrote:
> > > > + arm_smmu_write_ctx_desc(smmu_domain, mm->pasid,
> > > > &invalid_cd); +
> > > > + arm_smmu_tlb_inv_asid(smmu_domain->smmu,
> > > > smmu_mn->cd->asid);
> > > > + /* TODO: invalidate ATS */
> > > > +
> > > If mm
On Tue, 5 May 2020 11:15:31 +0200
Jean-Philippe Brucker wrote:
> On Mon, May 04, 2020 at 01:47:23PM -0700, Jacob Pan wrote:
> > > > > + arm_smmu_write_ctx_desc(smmu_domain, mm->pasid,
> > > > > &invalid_cd); +
> > > > > + arm_smmu_tlb_inv_asid(smmu_domain->smmu,
> > > > > smmu_mn->cd->asi
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