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From: Liu Yi L <yi.l.liu@intel.com>
To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com
Cc: jean-philippe@linaro.org, kevin.tian@intel.com,
	yi.l.liu@intel.com, Yi Sun <yi.y.sun@linux.intel.com>,
	kvm@vger.kernel.org, mst@redhat.com, jun.j.tian@intel.com,
	eric.auger@redhat.com, yi.y.sun@intel.com,
	Jacob Pan <jacob.jun.pan@linux.intel.com>,
	pbonzini@redhat.com, hao.wu@intel.com,
	david@gibson.dropbear.id.au
Subject: [PATCH v1 06/22] hw/pci: introduce pci_device_set/unset_iommu_context()
Date: Sun, 22 Mar 2020 05:36:03 -0700
Message-ID: <1584880579-12178-7-git-send-email-yi.l.liu@intel.com> (raw)
In-Reply-To: <1584880579-12178-1-git-send-email-yi.l.liu@intel.com>

This patch adds pci_device_set/unset_iommu_context() to set/unset
host_iommu_context for a given device. New callback is added in
PCIIOMMUOps. As such, vIOMMU could make use of host IOMMU capability.
e.g setup nested translation.

Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Yi Sun <yi.y.sun@linux.intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
---
 hw/pci/pci.c         | 49 ++++++++++++++++++++++++++++++++++++++++++++-----
 include/hw/pci/pci.h | 10 ++++++++++
 2 files changed, 54 insertions(+), 5 deletions(-)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index aa9025c..8642ea8 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2638,7 +2638,8 @@ static void pci_device_class_base_init(ObjectClass *klass, void *data)
     }
 }
 
-AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
+static void pci_device_get_iommu_bus_devfn(PCIDevice *dev,
+                              PCIBus **pbus, uint8_t *pdevfn)
 {
     PCIBus *bus = pci_get_bus(dev);
     PCIBus *iommu_bus = bus;
@@ -2683,14 +2684,52 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
 
         iommu_bus = parent_bus;
     }
-    if (iommu_bus && iommu_bus->iommu_ops &&
-                     iommu_bus->iommu_ops->get_address_space) {
-        return iommu_bus->iommu_ops->get_address_space(bus,
-                                 iommu_bus->iommu_opaque, devfn);
+    *pbus = iommu_bus;
+    *pdevfn = devfn;
+}
+
+AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
+{
+    PCIBus *bus;
+    uint8_t devfn;
+
+    pci_device_get_iommu_bus_devfn(dev, &bus, &devfn);
+    if (bus && bus->iommu_ops &&
+                     bus->iommu_ops->get_address_space) {
+        return bus->iommu_ops->get_address_space(bus,
+                                bus->iommu_opaque, devfn);
     }
     return &address_space_memory;
 }
 
+int pci_device_set_iommu_context(PCIDevice *dev,
+                                 HostIOMMUContext *host_icx)
+{
+    PCIBus *bus;
+    uint8_t devfn;
+
+    pci_device_get_iommu_bus_devfn(dev, &bus, &devfn);
+    if (bus && bus->iommu_ops &&
+                    bus->iommu_ops->set_iommu_context) {
+        return bus->iommu_ops->set_iommu_context(bus,
+                              bus->iommu_opaque, devfn, host_icx);
+    }
+    return -ENOENT;
+}
+
+void pci_device_unset_iommu_context(PCIDevice *dev)
+{
+    PCIBus *bus;
+    uint8_t devfn;
+
+    pci_device_get_iommu_bus_devfn(dev, &bus, &devfn);
+    if (bus && bus->iommu_ops &&
+                    bus->iommu_ops->unset_iommu_context) {
+        bus->iommu_ops->unset_iommu_context(bus,
+                                 bus->iommu_opaque, devfn);
+    }
+}
+
 void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *ops, void *opaque)
 {
     bus->iommu_ops = ops;
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index ffe192d..6fca2a0 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -9,6 +9,8 @@
 
 #include "hw/pci/pcie.h"
 
+#include "hw/iommu/host_iommu_context.h"
+
 extern bool pci_available;
 
 /* PCI bus */
@@ -489,9 +491,17 @@ typedef struct PCIIOMMUOps PCIIOMMUOps;
 struct PCIIOMMUOps {
     AddressSpace * (*get_address_space)(PCIBus *bus,
                                 void *opaque, int32_t devfn);
+    int (*set_iommu_context)(PCIBus *bus, void *opaque,
+                             int32_t devfn,
+                             HostIOMMUContext *host_icx);
+    void (*unset_iommu_context)(PCIBus *bus, void *opaque,
+                                int32_t devfn);
 };
 
 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev);
+int pci_device_set_iommu_context(PCIDevice *dev,
+                                 HostIOMMUContext *host_icx);
+void pci_device_unset_iommu_context(PCIDevice *dev);
 void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *iommu_ops, void *opaque);
 
 static inline void
-- 
2.7.4



  parent reply index

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-22 12:35 [PATCH v1 00/22] intel_iommu: expose Shared Virtual Addressing to VMs Liu Yi L
2020-03-22 12:35 ` [PATCH v1 01/22] scripts/update-linux-headers: Import iommu.h Liu Yi L
2020-03-22 12:35 ` [PATCH v1 02/22] header file update VFIO/IOMMU vSVA APIs Liu Yi L
2020-03-29 16:32   ` Auger Eric
2020-03-30  7:06     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 03/22] vfio: check VFIO_TYPE1_NESTING_IOMMU support Liu Yi L
2020-03-22 12:36 ` [PATCH v1 04/22] hw/iommu: introduce HostIOMMUContext Liu Yi L
2020-03-23 20:58   ` Peter Xu
2020-03-24 10:00     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 05/22] hw/pci: modify pci_setup_iommu() to set PCIIOMMUOps Liu Yi L
2020-03-22 12:36 ` Liu Yi L [this message]
2020-03-23 21:15   ` [PATCH v1 06/22] hw/pci: introduce pci_device_set/unset_iommu_context() Peter Xu
2020-03-24 10:02     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 07/22] intel_iommu: add set/unset_iommu_context callback Liu Yi L
2020-03-23 21:29   ` Peter Xu
2020-03-24 11:15     ` Liu, Yi L
2020-03-24 15:24       ` Peter Xu
2020-03-25  9:37         ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 08/22] vfio: init HostIOMMUContext per-container Liu Yi L
     [not found]   ` <20200323213943.GR127076@xz-x1>
2020-03-24 13:03     ` Liu, Yi L
2020-03-24 14:45       ` Peter Xu
2020-03-25  9:30         ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 09/22] vfio/common: check PASID alloc/free availability Liu Yi L
2020-03-23 22:06   ` Peter Xu
2020-03-24 11:18     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 10/22] intel_iommu: add virtual command capability support Liu Yi L
2020-03-22 12:36 ` [PATCH v1 11/22] intel_iommu: process PASID cache invalidation Liu Yi L
2020-03-22 12:36 ` [PATCH v1 12/22] intel_iommu: add PASID cache management infrastructure Liu Yi L
2020-03-24 17:32   ` Peter Xu
2020-03-25 12:20     ` Liu, Yi L
2020-03-25 14:52       ` Peter Xu
2020-03-26  6:15         ` Liu, Yi L
2020-03-26 13:57           ` Liu, Yi L
2020-03-26 15:53             ` Peter Xu
2020-03-27  1:33               ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 13/22] vfio: add bind stage-1 page table support Liu Yi L
2020-03-24 17:41   ` Peter Xu
2020-03-25  9:49     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 14/22] intel_iommu: bind/unbind guest page table to host Liu Yi L
2020-03-24 17:46   ` Peter Xu
2020-03-25 12:42     ` Liu, Yi L
2020-03-25 14:56       ` Peter Xu
2020-03-26  3:04         ` Liu, Yi L
2020-03-25 12:47     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 15/22] intel_iommu: replay guest pasid bindings " Liu Yi L
2020-03-24 18:00   ` Peter Xu
2020-03-25 13:14     ` Liu, Yi L
2020-03-25 15:06       ` Peter Xu
2020-03-26  3:17         ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 16/22] intel_iommu: replay pasid binds after context cache invalidation Liu Yi L
2020-03-24 18:07   ` Peter Xu
2020-03-25 13:18     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 17/22] intel_iommu: do not pass down pasid bind for PASID #0 Liu Yi L
2020-03-24 18:13   ` Peter Xu
2020-03-25 10:42     ` Liu, Yi L
2020-03-25 15:12       ` Peter Xu
2020-03-26  2:42         ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 18/22] vfio: add support for flush iommu stage-1 cache Liu Yi L
2020-03-24 18:19   ` Peter Xu
2020-03-25 10:40     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 19/22] intel_iommu: process PASID-based iotlb invalidation Liu Yi L
2020-03-24 18:26   ` Peter Xu
2020-03-25 13:36     ` Liu, Yi L
2020-03-25 15:15       ` Peter Xu
2020-03-29 11:17         ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 20/22] intel_iommu: propagate PASID-based iotlb invalidation to host Liu Yi L
2020-03-24 18:34   ` Peter Xu
2020-03-25 13:21     ` Liu, Yi L
2020-03-26  5:41       ` Liu, Yi L
2020-03-26 13:02         ` Peter Xu
2020-03-26 13:22           ` Peter Xu
2020-03-26 13:33             ` Liu, Yi L
2020-03-26 13:23           ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 21/22] intel_iommu: process PASID-based Device-TLB invalidation Liu Yi L
2020-03-24 18:36   ` Peter Xu
2020-03-25  9:19     ` Liu, Yi L
2020-03-22 12:36 ` [PATCH v1 22/22] intel_iommu: modify x-scalable-mode to be string option Liu Yi L
2020-03-24 18:39   ` Peter Xu
2020-03-25 13:22     ` Liu, Yi L
2020-03-22 13:25 ` [PATCH v1 00/22] intel_iommu: expose Shared Virtual Addressing to VMs no-reply

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