Re: [PATCH 3/7] iommu/vt-d: Fix PASID devTLB invalidation

2020-06-29 Thread Jacob Pan
On Tue, 30 Jun 2020 03:01:29 + "Tian, Kevin" wrote: > > From: Lu Baolu > > Sent: Thursday, June 25, 2020 3:26 PM > > > > On 2020/6/23 23:43, Jacob Pan wrote: > > > DevTLB flush can be used for both DMA request with and without > > > PASIDs. The former uses PASID#0 (RID2PASID), latter uses

Re: [PATCH 3/7] iommu/vt-d: Fix PASID devTLB invalidation

2020-06-29 Thread Jacob Pan
On Thu, 25 Jun 2020 15:25:57 +0800 Lu Baolu wrote: > On 2020/6/23 23:43, Jacob Pan wrote: > > DevTLB flush can be used for both DMA request with and without > > PASIDs. The former uses PASID#0 (RID2PASID), latter uses non-zero > > PASID for SVA usage. > > > > This patch adds a check for PASID va

RE: [PATCH 3/7] iommu/vt-d: Fix PASID devTLB invalidation

2020-06-29 Thread Tian, Kevin
> From: Lu Baolu > Sent: Thursday, June 25, 2020 3:26 PM > > On 2020/6/23 23:43, Jacob Pan wrote: > > DevTLB flush can be used for both DMA request with and without PASIDs. > > The former uses PASID#0 (RID2PASID), latter uses non-zero PASID for SVA > > usage. > > > > This patch adds a check for P

Re: [PATCH 3/7] iommu/vt-d: Fix PASID devTLB invalidation

2020-06-25 Thread Lu Baolu
On 2020/6/23 23:43, Jacob Pan wrote: DevTLB flush can be used for both DMA request with and without PASIDs. The former uses PASID#0 (RID2PASID), latter uses non-zero PASID for SVA usage. This patch adds a check for PASID value such that devTLB flush with PASID is used for SVA case. This is more

[PATCH 3/7] iommu/vt-d: Fix PASID devTLB invalidation

2020-06-23 Thread Jacob Pan
DevTLB flush can be used for both DMA request with and without PASIDs. The former uses PASID#0 (RID2PASID), latter uses non-zero PASID for SVA usage. This patch adds a check for PASID value such that devTLB flush with PASID is used for SVA case. This is more efficient in that multiple PASIDs can b