The patch implements the newly added IOMMU-like member functions by
respectively delegating the job to:
- VIRTIO_DEVICE_PROTOCOL.AllocateSharedPages () ->
MemoryAllocationLib.AllocatePages()
- VIRTIO_DEVICE_PROTOCOL.FreeSharedPages () ->
MemoryAllocationLib.FreePages ()
- VIRTIO_DEVICE_PROTOCOL.MapSharedBuffer () -> no-op
- VIRTIO_DEVICE_PROTOCOL.UnmapSharedBuffer () -> no-op
Suggested-by: Laszlo Ersek <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Jordan Justen <[email protected]>
Cc: Tom Lendacky <[email protected]>
Cc: Laszlo Ersek <[email protected]>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <[email protected]>
---
OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h | 34
+++++++++++
OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceFunctions.c | 59
++++++++++++++++++++
2 files changed, 93 insertions(+)
diff --git a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h
b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h
index bedd635e1a86..b69f6d7b7a85 100644
--- a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h
+++ b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.h
@@ -137,4 +137,38 @@ VirtioMmioSetGuestFeatures (
IN UINT64 Features
);
+EFI_STATUS
+EFIAPI
+VirtioMmioAllocateSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ OUT VOID **HostAddress
+ );
+
+VOID
+EFIAPI
+VirtioMmioFreeSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ IN VOID *HostAddress
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioMapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN VIRTIO_MAP_OPERATION Operation,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ );
+
+EFI_STATUS
+EFIAPI
+VirtioMmioUnmapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN VOID *Mapping
+ );
+
#endif // _VIRTIO_MMIO_DEVICE_INTERNAL_H_
diff --git a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceFunctions.c
b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceFunctions.c
index 9142d4a162c0..f3f69f324c6c 100644
--- a/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceFunctions.c
+++ b/OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDeviceFunctions.c
@@ -16,6 +16,8 @@
**/
+#include <Library/MemoryAllocationLib.h>
+
#include "VirtioMmioDevice.h"
EFI_STATUS
@@ -293,3 +295,60 @@ VirtioMmioDeviceRead (
return EFI_SUCCESS;
}
+
+EFI_STATUS
+EFIAPI
+VirtioMmioAllocateSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ OUT VOID **HostAddress
+ )
+{
+ VOID *Buffer;
+
+ Buffer = AllocatePages (NumPages);
+ if (Buffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ *HostAddress = Buffer;
+ return EFI_SUCCESS;
+}
+
+VOID
+EFIAPI
+VirtioMmioFreeSharedPages (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN UINTN NumPages,
+ IN VOID *HostAddress
+ )
+{
+ FreePages (HostAddress, NumPages);
+}
+
+EFI_STATUS
+EFIAPI
+VirtioMmioMapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ IN VIRTIO_MAP_OPERATION Operation,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ )
+{
+ *DeviceAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
+ *Mapping = NULL;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+VirtioMmioUnmapSharedBuffer (
+ IN VIRTIO_DEVICE_PROTOCOL *This,
+ OUT VOID *Mapping
+ )
+{
+ return EFI_SUCCESS;
+}
--
2.7.4
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