On Mon, Jul 13, 2020 at 09:22:37PM +0100, Will Deacon wrote:
> > +static struct arm_smmu_ctx_desc *arm_smmu_share_asid(u16 asid)
> > +{
> > + struct arm_smmu_ctx_desc *cd;
> >
> > - xa_erase(&asid_xa, cd->asid);
> > + cd = xa_load(&asid_xa, asid);
> > + if (!cd)
> > + return NUL
On Thu, Jun 18, 2020 at 05:51:20PM +0200, Jean-Philippe Brucker wrote:
> With Shared Virtual Addressing (SVA), we need to mirror CPU TTBR, TCR,
> MAIR and ASIDs in SMMU contexts. Each SMMU has a single ASID space split
> into two sets, shared and private. Shared ASIDs correspond to those
> obtained
With Shared Virtual Addressing (SVA), we need to mirror CPU TTBR, TCR,
MAIR and ASIDs in SMMU contexts. Each SMMU has a single ASID space split
into two sets, shared and private. Shared ASIDs correspond to those
obtained from the arch ASID allocator, and private ASIDs are used for
"classic" map/unm
