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[RFC v9 11/29] pci: introduce PCIPASIDOps to PCIDevice
From: |
Eric Auger |
Subject: |
[RFC v9 11/29] pci: introduce PCIPASIDOps to PCIDevice |
Date: |
Sun, 11 Apr 2021 14:08:54 +0200 |
From: Liu Yi L <yi.l.liu@intel.com>
This patch introduces PCIPASIDOps for IOMMU related operations.
https://lists.gnu.org/archive/html/qemu-devel/2018-03/msg00078.html
https://lists.gnu.org/archive/html/qemu-devel/2018-03/msg00940.html
So far, to setup virt-SVA for assigned SVA capable device, needs to
configure host translation structures for specific pasid. (e.g. bind
guest page table to host and enable nested translation in host).
Besides, vIOMMU emulator needs to forward guest's cache invalidation
to host since host nested translation is enabled. e.g. on VT-d, guest
owns 1st level translation table, thus cache invalidation for 1st
level should be propagated to host.
This patch adds two functions: alloc_pasid and free_pasid to support
guest pasid allocation and free. The implementations of the callbacks
would be device passthru modules. Like vfio.
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>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
---
include/hw/pci/pci.h | 11 +++++++++++
hw/pci/pci.c | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 45 insertions(+)
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 6be4e0c460..1f73c04975 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -9,6 +9,7 @@
#include "hw/pci/pcie.h"
#include "qom/object.h"
+#include "hw/iommu/iommu.h"
extern bool pci_available;
@@ -265,6 +266,11 @@ struct PCIReqIDCache {
};
typedef struct PCIReqIDCache PCIReqIDCache;
+struct PCIPASIDOps {
+ int (*set_pasid_table)(PCIBus *bus, int32_t devfn, IOMMUConfig *config);
+};
+typedef struct PCIPASIDOps PCIPASIDOps;
+
struct PCIDevice {
DeviceState qdev;
bool partially_hotplugged;
@@ -360,6 +366,7 @@ struct PCIDevice {
/* ID of standby device in net_failover pair */
char *failover_pair_id;
uint32_t acpi_index;
+ PCIPASIDOps *pasid_ops;
};
void pci_register_bar(PCIDevice *pci_dev, int region_num,
@@ -491,6 +498,10 @@ typedef AddressSpace *(*PCIIOMMUFunc)(PCIBus *, void *,
int);
AddressSpace *pci_device_iommu_address_space(PCIDevice *dev);
void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque);
+void pci_setup_pasid_ops(PCIDevice *dev, PCIPASIDOps *ops);
+bool pci_device_is_pasid_ops_set(PCIBus *bus, int32_t devfn);
+int pci_device_set_pasid_table(PCIBus *bus, int32_t devfn, IOMMUConfig
*config);
+
static inline void
pci_set_byte(uint8_t *config, uint8_t val)
{
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 8f35e13a0c..114855a0ac 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2731,6 +2731,40 @@ void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void
*opaque)
bus->iommu_opaque = opaque;
}
+void pci_setup_pasid_ops(PCIDevice *dev, PCIPASIDOps *ops)
+{
+ assert(ops && !dev->pasid_ops);
+ dev->pasid_ops = ops;
+}
+
+bool pci_device_is_pasid_ops_set(PCIBus *bus, int32_t devfn)
+{
+ PCIDevice *dev;
+
+ if (!bus) {
+ return false;
+ }
+
+ dev = bus->devices[devfn];
+ return !!(dev && dev->pasid_ops);
+}
+
+int pci_device_set_pasid_table(PCIBus *bus, int32_t devfn,
+ IOMMUConfig *config)
+{
+ PCIDevice *dev;
+
+ if (!bus) {
+ return -EINVAL;
+ }
+
+ dev = bus->devices[devfn];
+ if (dev && dev->pasid_ops && dev->pasid_ops->set_pasid_table) {
+ return dev->pasid_ops->set_pasid_table(bus, devfn, config);
+ }
+ return -ENOENT;
+}
+
static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)
{
Range *range = opaque;
--
2.26.3
- [RFC v9 01/29] hw/vfio/common: trace vfio_connect_container operations, (continued)
- [RFC v9 01/29] hw/vfio/common: trace vfio_connect_container operations, Eric Auger, 2021/04/11
- [RFC v9 02/29] update-linux-headers: Import iommu.h, Eric Auger, 2021/04/11
- [RFC v9 03/29] header update against 5.12-rc6 and IOMMU/VFIO nested stage APIs, Eric Auger, 2021/04/11
- [RFC v9 04/29] memory: Add new fields in IOTLBEntry, Eric Auger, 2021/04/11
- [RFC v9 05/29] hw/arm/smmuv3: Improve stage1 ASID invalidation, Eric Auger, 2021/04/11
- [RFC v9 06/29] hw/arm/smmu-common: Allow domain invalidation for NH_ALL/NSNH_ALL, Eric Auger, 2021/04/11
- [RFC v9 07/29] memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute, Eric Auger, 2021/04/11
- [RFC v9 09/29] memory: Introduce IOMMU Memory Region inject_faults API, Eric Auger, 2021/04/11
- [RFC v9 08/29] memory: Add IOMMU_ATTR_MSI_TRANSLATE IOMMU memory region attribute, Eric Auger, 2021/04/11
- [RFC v9 10/29] iommu: Introduce generic header, Eric Auger, 2021/04/11
- [RFC v9 11/29] pci: introduce PCIPASIDOps to PCIDevice,
Eric Auger <=
- [RFC v9 12/29] vfio: Force nested if iommu requires it, Eric Auger, 2021/04/11
- [RFC v9 13/29] vfio: Introduce hostwin_from_range helper, Eric Auger, 2021/04/11
- [RFC v9 14/29] vfio: Introduce helpers to DMA map/unmap a RAM section, Eric Auger, 2021/04/11
- [RFC v9 15/29] vfio: Set up nested stage mappings, Eric Auger, 2021/04/11