On Wed, 14 Jun 2017 15:23:00 -0700
Jacob Pan <jacob.jun....@linux.intel.com> wrote:
> When PASID table pointer of an assigned device is bond to a guest,
s/bond/bound/
> the first level page tables are managed by the guest. However, only
> host/physical IOMMU can detect fault events, e.g. page requests.
> Therefore, we need to keep track of which device has its PASID table
> pointer bond to a guest such that page request and other events can
same and throughout...
> be propagated to the guest as needed.
>
> Signed-off-by: Jacob Pan <jacob.jun....@linux.intel.com>
> Signed-off-by: Ashok Raj <ashok....@intel.com>
> ---
> drivers/iommu/intel-iommu.c | 19 +------------------
> include/linux/intel-iommu.h | 19 +++++++++++++++++++
> 2 files changed, 20 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index 6b8e997..9765277 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -416,24 +416,6 @@ struct dmar_domain {
> iommu core */
> };
>
> -/* PCI domain-device relationship */
> -struct device_domain_info {
> - struct list_head link; /* link to domain siblings */
> - struct list_head global; /* link to global list */
> - u8 bus; /* PCI bus number */
> - u8 devfn; /* PCI devfn number */
> - u8 pasid_supported:3;
> - u8 pasid_enabled:1;
> - u8 pri_supported:1;
> - u8 pri_enabled:1;
> - u8 ats_supported:1;
> - u8 ats_enabled:1;
> - u8 ats_qdep;
> - struct device *dev; /* it's NULL for PCIe-to-PCI bridge */
> - struct intel_iommu *iommu; /* IOMMU used by this device */
> - struct dmar_domain *domain; /* pointer to domain */
> -};
> -
> struct dmar_rmrr_unit {
> struct list_head list; /* list of rmrr units */
> struct acpi_dmar_header *hdr; /* ACPI header */
> @@ -5547,6 +5529,7 @@ static int intel_iommu_bind_pasid_table(struct
> iommu_domain *domain,
> DMA_CCMD_MASK_NOBIT,
> DMA_CCMD_DEVICE_INVL);
> iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH);
> + info->pasid_tbl_bond = 1;
> spin_unlock_irqrestore(&iommu->lock, flags);
>
>
> diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
> index 8df6c91..ed39c56 100644
> --- a/include/linux/intel-iommu.h
> +++ b/include/linux/intel-iommu.h
> @@ -434,6 +434,25 @@ struct intel_iommu {
> u32 flags; /* Software defined flags */
> };
>
> +/* PCI domain-device relationship */
> +struct device_domain_info {
> + struct list_head link; /* link to domain siblings */
> + struct list_head global; /* link to global list */
> + u8 bus; /* PCI bus number */
> + u8 devfn; /* PCI devfn number */
> + u8 pasid_supported:3;
> + u8 pasid_enabled:1;
> + u8 pasid_tbl_bond:1; /* bond to guest PASID table */
> + u8 pri_supported:1;
> + u8 pri_enabled:1;
> + u8 ats_supported:1;
> + u8 ats_enabled:1;
> + u8 ats_qdep;
> + struct device *dev; /* it's NULL for PCIe-to-PCI bridge */
> + struct intel_iommu *iommu; /* IOMMU used by this device */
> + struct dmar_domain *domain; /* pointer to domain */
> +};
> +
> static inline void __iommu_flush_cache(
> struct intel_iommu *iommu, void *addr, int size)
> {
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