| Message ID | 1584880579-12178-22-git-send-email-yi.l.liu@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | intel_iommu: expose Shared Virtual Addressing to VMs | expand |
On Sun, Mar 22, 2020 at 05:36:18AM -0700, Liu Yi L wrote: > This patch adds an empty handling for PASID-based Device-TLB > invalidation. For now it is enough as it is not necessary to > propagate it to host for passthru device and also there is no > emulated device has device tlb. > > Cc: Kevin Tian <kevin.tian@intel.com> > Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> > Cc: Peter Xu <peterx@redhat.com> > Cc: Yi Sun <yi.y.sun@linux.intel.com> > Cc: Paolo Bonzini <pbonzini@redhat.com> > Cc: Richard Henderson <rth@twiddle.net> > Cc: Eduardo Habkost <ehabkost@redhat.com> > Signed-off-by: Liu Yi L <yi.l.liu@intel.com> OK this patch seems to be mostly meaningless... but OK since you've wrote it... :) Reviewed-by: Peter Xu <peterx@redhat.com>
> From: Peter Xu <peterx@redhat.com> > Sent: Wednesday, March 25, 2020 2:36 AM > To: Liu, Yi L <yi.l.liu@intel.com> > Subject: Re: [PATCH v1 21/22] intel_iommu: process PASID-based Device-TLB > invalidation > > On Sun, Mar 22, 2020 at 05:36:18AM -0700, Liu Yi L wrote: > > This patch adds an empty handling for PASID-based Device-TLB > > invalidation. For now it is enough as it is not necessary to propagate > > it to host for passthru device and also there is no emulated device > > has device tlb. > > > > Cc: Kevin Tian <kevin.tian@intel.com> > > Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> > > Cc: Peter Xu <peterx@redhat.com> > > Cc: Yi Sun <yi.y.sun@linux.intel.com> > > Cc: Paolo Bonzini <pbonzini@redhat.com> > > Cc: Richard Henderson <rth@twiddle.net> > > Cc: Eduardo Habkost <ehabkost@redhat.com> > > Signed-off-by: Liu Yi L <yi.l.liu@intel.com> > > OK this patch seems to be mostly meaningless... but OK since you've wrote it... :) > > Reviewed-by: Peter Xu <peterx@redhat.com> Thanks, Yi Liu
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 10d314d..72cd739 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -3339,6 +3339,17 @@ static bool vtd_process_inv_iec_desc(IntelIOMMUState *s, return true; } +static bool vtd_process_device_piotlb_desc(IntelIOMMUState *s, + VTDInvDesc *inv_desc) +{ + /* + * no need to handle it for passthru device, for emulated + * devices with device tlb, it may be required, but for now, + * return is enough + */ + return true; +} + static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s, VTDInvDesc *inv_desc) { @@ -3460,6 +3471,13 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s) } break; + case VTD_INV_DESC_DEV_PIOTLB: + trace_vtd_inv_desc("device-piotlb", inv_desc.hi, inv_desc.lo); + if (!vtd_process_device_piotlb_desc(s, &inv_desc)) { + return false; + } + break; + case VTD_INV_DESC_DEVICE: trace_vtd_inv_desc("device", inv_desc.hi, inv_desc.lo); if (!vtd_process_device_iotlb_desc(s, &inv_desc)) { diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h index 967cc4f..b5507ce 100644 --- a/hw/i386/intel_iommu_internal.h +++ b/hw/i386/intel_iommu_internal.h @@ -386,6 +386,7 @@ typedef union VTDInvDesc VTDInvDesc; #define VTD_INV_DESC_WAIT 0x5 /* Invalidation Wait Descriptor */ #define VTD_INV_DESC_PIOTLB 0x6 /* PASID-IOTLB Invalidate Desc */ #define VTD_INV_DESC_PC 0x7 /* PASID-cache Invalidate Desc */ +#define VTD_INV_DESC_DEV_PIOTLB 0x8 /* PASID-based-DIOTLB inv_desc*/ #define VTD_INV_DESC_NONE 0 /* Not an Invalidate Descriptor */ /* Masks for Invalidation Wait Descriptor*/
This patch adds an empty handling for PASID-based Device-TLB invalidation. For now it is enough as it is not necessary to propagate it to host for passthru device and also there is no emulated device has device tlb. Cc: Kevin Tian <kevin.tian@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Peter Xu <peterx@redhat.com> Cc: Yi Sun <yi.y.sun@linux.intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Liu Yi L <yi.l.liu@intel.com> --- hw/i386/intel_iommu.c | 18 ++++++++++++++++++ hw/i386/intel_iommu_internal.h | 1 + 2 files changed, 19 insertions(+)