**/\r
\r
#include <IndustryStandard/Pci22.h>\r
+#include <IndustryStandard/Virtio095.h>\r
#include <Library/BootLogoLib.h>\r
#include <Library/DevicePathLib.h>\r
#include <Library/PcdLib.h>\r
#include <Protocol/LoadedImage.h>\r
#include <Protocol/PciIo.h>\r
#include <Protocol/PciRootBridgeIo.h>\r
+#include <Protocol/VirtioDevice.h>\r
#include <Guid/EventGroup.h>\r
#include <Guid/RootBridgesConnectedEventGroup.h>\r
\r
}\r
\r
\r
+/**\r
+ This FILTER_FUNCTION checks if a handle corresponds to a Virtio RNG device at\r
+ the VIRTIO_DEVICE_PROTOCOL level.\r
+**/\r
+STATIC\r
+BOOLEAN\r
+EFIAPI\r
+IsVirtioRng (\r
+ IN EFI_HANDLE Handle,\r
+ IN CONST CHAR16 *ReportText\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ VIRTIO_DEVICE_PROTOCOL *VirtIo;\r
+\r
+ Status = gBS->HandleProtocol (Handle, &gVirtioDeviceProtocolGuid,\r
+ (VOID**)&VirtIo);\r
+ if (EFI_ERROR (Status)) {\r
+ return FALSE;\r
+ }\r
+ return (BOOLEAN)(VirtIo->SubSystemDeviceId ==\r
+ VIRTIO_SUBSYSTEM_ENTROPY_SOURCE);\r
+}\r
+\r
+\r
+/**\r
+ This FILTER_FUNCTION checks if a handle corresponds to a Virtio RNG device at\r
+ the EFI_PCI_IO_PROTOCOL level.\r
+**/\r
+STATIC\r
+BOOLEAN\r
+EFIAPI\r
+IsVirtioPciRng (\r
+ IN EFI_HANDLE Handle,\r
+ IN CONST CHAR16 *ReportText\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_PCI_IO_PROTOCOL *PciIo;\r
+ UINT16 VendorId;\r
+ UINT16 DeviceId;\r
+ UINT8 RevisionId;\r
+ BOOLEAN Virtio10;\r
+ UINT16 SubsystemId;\r
+\r
+ Status = gBS->HandleProtocol (Handle, &gEfiPciIoProtocolGuid,\r
+ (VOID**)&PciIo);\r
+ if (EFI_ERROR (Status)) {\r
+ return FALSE;\r
+ }\r
+\r
+ //\r
+ // Read and check VendorId.\r
+ //\r
+ Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint16, PCI_VENDOR_ID_OFFSET,\r
+ 1, &VendorId);\r
+ if (EFI_ERROR (Status)) {\r
+ goto PciError;\r
+ }\r
+ if (VendorId != VIRTIO_VENDOR_ID) {\r
+ return FALSE;\r
+ }\r
+\r
+ //\r
+ // Read DeviceId and RevisionId.\r
+ //\r
+ Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint16, PCI_DEVICE_ID_OFFSET,\r
+ 1, &DeviceId);\r
+ if (EFI_ERROR (Status)) {\r
+ goto PciError;\r
+ }\r
+ Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, PCI_REVISION_ID_OFFSET,\r
+ 1, &RevisionId);\r
+ if (EFI_ERROR (Status)) {\r
+ goto PciError;\r
+ }\r
+\r
+ //\r
+ // From DeviceId and RevisionId, determine whether the device is a\r
+ // modern-only Virtio 1.0 device. In case of Virtio 1.0, DeviceId can\r
+ // immediately be restricted to VIRTIO_SUBSYSTEM_ENTROPY_SOURCE, and\r
+ // SubsystemId will only play a sanity-check role. Otherwise, DeviceId can\r
+ // only be sanity-checked, and SubsystemId will decide.\r
+ //\r
+ if (DeviceId == 0x1040 + VIRTIO_SUBSYSTEM_ENTROPY_SOURCE &&\r
+ RevisionId >= 0x01) {\r
+ Virtio10 = TRUE;\r
+ } else if (DeviceId >= 0x1000 && DeviceId <= 0x103F && RevisionId == 0x00) {\r
+ Virtio10 = FALSE;\r
+ } else {\r
+ return FALSE;\r
+ }\r
+\r
+ //\r
+ // Read and check SubsystemId as dictated by Virtio10.\r
+ //\r
+ Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint16,\r
+ PCI_SUBSYSTEM_ID_OFFSET, 1, &SubsystemId);\r
+ if (EFI_ERROR (Status)) {\r
+ goto PciError;\r
+ }\r
+ if (Virtio10 && SubsystemId >= 0x40) {\r
+ return TRUE;\r
+ }\r
+ if (!Virtio10 && SubsystemId == VIRTIO_SUBSYSTEM_ENTROPY_SOURCE) {\r
+ return TRUE;\r
+ }\r
+ return FALSE;\r
+\r
+PciError:\r
+ DEBUG ((DEBUG_ERROR, "%a: %s: %r\n", __FUNCTION__, ReportText, Status));\r
+ return FALSE;\r
+}\r
+\r
+\r
/**\r
This CALLBACK_FUNCTION attempts to connect a handle non-recursively, asking\r
the matching driver to produce all first-level child handles.\r
// Register platform-specific boot options and keyboard shortcuts.\r
//\r
PlatformRegisterOptionsAndKeys ();\r
+\r
+ //\r
+ // At this point, VIRTIO_DEVICE_PROTOCOL instances exist only for Virtio MMIO\r
+ // transports. Install EFI_RNG_PROTOCOL instances on Virtio MMIO RNG devices.\r
+ //\r
+ FilterAndProcess (&gVirtioDeviceProtocolGuid, IsVirtioRng, Connect);\r
+\r
+ //\r
+ // Install both VIRTIO_DEVICE_PROTOCOL and (dependent) EFI_RNG_PROTOCOL\r
+ // instances on Virtio PCI RNG devices.\r
+ //\r
+ FilterAndProcess (&gEfiPciIoProtocolGuid, IsVirtioPciRng, Connect);\r
}\r
\r
/**\r
VOID\r
)\r
{\r
+ RETURN_STATUS Status;\r
+\r
//\r
// Show the splash screen.\r
//\r
BootLogoEnableLogo ();\r
\r
//\r
- // Connect the rest of the devices.\r
+ // Process QEMU's -kernel command line option. The kernel booted this way\r
+ // will receive ACPI tables: in PlatformBootManagerBeforeConsole(), we\r
+ // connected any and all PCI root bridges, and then signaled the ACPI\r
+ // platform driver.\r
//\r
- EfiBootManagerConnectAll ();\r
+ TryRunningQemuKernel ();\r
\r
//\r
- // Process QEMU's -kernel command line option. Note that the kernel booted\r
- // this way should receive ACPI tables, which is why we connect all devices\r
- // first (see above) -- PCI enumeration blocks ACPI table installation, if\r
- // there is a PCI host.\r
+ // Connect the purported boot devices.\r
//\r
- TryRunningQemuKernel ();\r
+ Status = ConnectDevicesFromQemu ();\r
+ if (RETURN_ERROR (Status)) {\r
+ //\r
+ // Connect the rest of the devices.\r
+ //\r
+ EfiBootManagerConnectAll ();\r
+ }\r
\r
//\r
// Enumerate all possible boot options, then filter and reorder them based on\r
// Register UEFI Shell\r
//\r
PlatformRegisterFvBootOption (\r
- PcdGetPtr (PcdShellFile), L"EFI Internal Shell", LOAD_OPTION_ACTIVE\r
+ &gUefiShellFileGuid, L"EFI Internal Shell", LOAD_OPTION_ACTIVE\r
);\r
\r
RemoveStaleFvFileOptions ();\r
projects / mirror_edk2.git / blobdiff