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pci: Add return_page_response pci ops

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Add a new PCI operation that allows to return page responses
to registered VFIO devices

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
This commit is contained in:
Chen Qun 2020-11-06 14:34:35 +01:00
parent c2ecdaca13
commit 2117b42cb1
1 changed files with 86 additions and 0 deletions
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86
pci-Add-return_page_response-pci-ops.patch Normal file
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@ -0,0 +1,86 @@
From e3b498a1afec138693251bf1bd1fa9b322a880fb Mon Sep 17 00:00:00 2001
From: Eric Auger <eric.auger@redhat.com>
Date: Fri, 6 Nov 2020 14:34:35 +0100
Subject: [PATCH] pci: Add return_page_response pci ops
Add a new PCI operation that allows to return page responses
to registered VFIO devices
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
---
hw/pci/pci.c | 16 ++++++++++++++++
include/hw/iommu/iommu.h | 8 ++++++++
include/hw/pci/pci.h | 4 ++++
3 files changed, 28 insertions(+)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index f11ca7964e..a8b3d1c071 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2660,6 +2660,22 @@ int pci_device_set_pasid_table(PCIBus *bus, int32_t devfn,
return -ENOENT;
}
+int pci_device_return_page_response(PCIBus *bus, int32_t devfn,
+ IOMMUPageResponse *resp)
+{
+ PCIDevice *dev;
+
+ if (!bus) {
+ return -EINVAL;
+ }
+
+ dev = bus->devices[devfn];
+ if (dev && dev->pasid_ops && dev->pasid_ops->return_page_response) {
+ return dev->pasid_ops->return_page_response(bus, devfn, resp);
+ }
+ return -ENOENT;
+}
+
static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)
{
Range *range = opaque;
diff --git a/include/hw/iommu/iommu.h b/include/hw/iommu/iommu.h
index 12092bda7b..5890f095b1 100644
--- a/include/hw/iommu/iommu.h
+++ b/include/hw/iommu/iommu.h
@@ -24,5 +24,13 @@ typedef struct IOMMUConfig {
};
} IOMMUConfig;
+typedef struct IOMMUPageResponse {
+ union {
+#ifdef __linux__
+ struct iommu_page_response resp;
+#endif
+ };
+} IOMMUPageResponse;
+
#endif /* QEMU_HW_IOMMU_IOMMU_H */
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index bb14ed61b0..5e7e0e4e6f 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -266,6 +266,8 @@ typedef struct PCIReqIDCache PCIReqIDCache;
struct PCIPASIDOps {
int (*set_pasid_table)(PCIBus *bus, int32_t devfn, IOMMUConfig *config);
+ int (*return_page_response)(PCIBus *bus, int32_t devfn,
+ IOMMUPageResponse *resp);
};
typedef struct PCIPASIDOps PCIPASIDOps;
@@ -495,6 +497,8 @@ 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);
+int pci_device_return_page_response(PCIBus *bus, int32_t devfn,
+ IOMMUPageResponse *resp);
static inline void
pci_set_byte(uint8_t *config, uint8_t val)
--
2.27.0