On 19 February 2016 at 14:49, Laszlo Ersek <ler...@redhat.com> wrote: > On 02/19/16 11:54, Ard Biesheuvel wrote: >> This implements a UEFI driver model driver for Virtio devices of type >> VIRTIO_SUBSYSTEM_ENTROPY_SOURCE, and exposes them via instances of >> the EFI_RNG_PROTOCOL protocol, supporting the EFI_RNG_ALGORITHM_RAW >> algorithm only. >> >> Contributed-under: TianoCore Contribution Agreement 1.0 >> Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org> >> --- >> >> 90% of this driver is boilerplate taken from the virtio-scsi driver. >> >> The purpose of this driver is to expose the EFI_RNG_PROTOCOL to the arm64 >> Linux kernel UEFI stub, which will use it to randomize the kernel address >> space [1] >> >> This driver can be tested from the UEFI shell using the RngTest UEFI >> application (SecurityPkg/Application/RngTest/RngTest.inf), example output >> can be found after the patch >> >> [1] http://thread.gmane.org/gmane.linux.kernel.efi/7446 >> >> OvmfPkg/VirtioRngDxe/VirtioRng.c | 593 ++++++++++++++++++++ >> OvmfPkg/VirtioRngDxe/VirtioRngDxe.inf | 45 ++ >> 2 files changed, 638 insertions(+) > > Can you push this to your repo please? >
Weblink: https://git.linaro.org/people/ard.biesheuvel/uefi-next.git/shortlog/refs/heads/virtio-rng Git URL: git://git.linaro.org/people/ard.biesheuvel/uefi-next.git virtio-rng >> diff --git a/OvmfPkg/VirtioRngDxe/VirtioRng.c >> b/OvmfPkg/VirtioRngDxe/VirtioRng.c >> new file mode 100644 >> index 000000000000..ab52f269fc3f >> --- /dev/null >> +++ b/OvmfPkg/VirtioRngDxe/VirtioRng.c >> @@ -0,0 +1,593 @@ >> +/** @file >> + >> + This driver produces EFI_RNG_PROTOCOL instances for virtio-rng devices. >> + >> + The implementation is based on OvmfPkg/VirtioScsiDxe/VirtioScsi.c >> + >> + Copyright (C) 2012, Red Hat, Inc. >> + Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved.<BR> >> + >> + This driver: >> + >> + Copyright (C) 2016, Linaro Ltd. >> + >> + This program and the accompanying materials are licensed and made >> available >> + under the terms and conditions of the BSD License which accompanies this >> + distribution. The full text of the license may be found at >> + http://opensource.org/licenses/bsd-license.php >> + >> + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, >> WITHOUT >> + WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. >> + >> +**/ >> + >> +#include <Library/BaseMemoryLib.h> >> +#include <Library/DebugLib.h> >> +#include <Library/MemoryAllocationLib.h> >> +#include <Library/UefiBootServicesTableLib.h> >> +#include <Library/UefiLib.h> >> +#include <Library/VirtioLib.h> >> + >> +#include <Protocol/ComponentName.h> >> +#include <Protocol/DriverBinding.h> >> +#include <Protocol/Rng.h> >> + >> +#include <IndustryStandard/Virtio.h> >> + >> +#define VIRTIO_RNG_SIG SIGNATURE_32 ('V', 'R', 'N', 'G') >> + >> +typedef struct { >> + UINT32 Signature; >> + VIRTIO_DEVICE_PROTOCOL *VirtIo; >> + EFI_EVENT ExitBoot; >> + VRING Ring; >> + EFI_RNG_PROTOCOL Rng; >> +} VIRTIO_RNG_DEV; >> + >> +#define VIRTIO_ENTROPY_SOURCE_FROM_RNG(RngPointer) \ >> + CR (RngPointer, VIRTIO_RNG_DEV, Rng, VIRTIO_RNG_SIG) >> + >> + >> +/** >> + Returns information about the random number generation implementation. >> + >> + @param[in] This A pointer to the EFI_RNG_PROTOCOL >> instance. >> + @param[in,out] RNGAlgorithmListSize On input, the size in bytes of >> RNGAlgorithmList. >> + On output with a return code of >> EFI_SUCCESS, the size >> + in bytes of the data returned in >> RNGAlgorithmList. On output >> + with a return code of >> EFI_BUFFER_TOO_SMALL, >> + the size of RNGAlgorithmList required >> to obtain the list. >> + @param[out] RNGAlgorithmList A caller-allocated memory buffer >> filled by the driver >> + with one EFI_RNG_ALGORITHM element >> for each supported >> + RNG algorithm. The list must not >> change across multiple >> + calls to the same driver. The first >> algorithm in the list >> + is the default algorithm for the >> driver. >> + >> + @retval EFI_SUCCESS The RNG algorithm list was returned >> successfully. >> + @retval EFI_UNSUPPORTED The services is not supported by this >> driver. >> + @retval EFI_DEVICE_ERROR The list of algorithms could not be >> retrieved due to a >> + hardware or firmware error. >> + @retval EFI_INVALID_PARAMETER One or more of the parameters are >> incorrect. >> + @retval EFI_BUFFER_TOO_SMALL The buffer RNGAlgorithmList is too >> small to hold the result. >> + >> +**/ >> +STATIC >> +EFI_STATUS >> +EFIAPI >> +VirtioRngGetInfo ( >> + IN EFI_RNG_PROTOCOL *This, >> + IN OUT UINTN *RNGAlgorithmListSize, >> + OUT EFI_RNG_ALGORITHM *RNGAlgorithmList >> + ) >> +{ >> + ASSERT (This != NULL); >> + ASSERT (RNGAlgorithmListSize != NULL); >> + >> + if (*RNGAlgorithmListSize < sizeof (EFI_RNG_ALGORITHM)) { >> + *RNGAlgorithmListSize = sizeof (EFI_RNG_ALGORITHM); >> + return EFI_BUFFER_TOO_SMALL; >> + } >> + >> + ASSERT (RNGAlgorithmList != NULL); >> + >> + *RNGAlgorithmListSize = sizeof (EFI_RNG_ALGORITHM); >> + CopyGuid (RNGAlgorithmList, &gEfiRngAlgorithmRaw); >> + >> + return EFI_SUCCESS; >> +} >> + >> +/** >> + Produces and returns an RNG value using either the default or specified >> RNG algorithm. >> + >> + @param[in] This A pointer to the EFI_RNG_PROTOCOL >> instance. >> + @param[in] RNGAlgorithm A pointer to the EFI_RNG_ALGORITHM >> that identifies the RNG >> + algorithm to use. May be NULL in >> which case the function will >> + use its default RNG algorithm. >> + @param[in] RNGValueLength The length in bytes of the memory >> buffer pointed to by >> + RNGValue. The driver shall return >> exactly this numbers of bytes. >> + @param[out] RNGValue A caller-allocated memory buffer >> filled by the driver with the >> + resulting RNG value. >> + >> + @retval EFI_SUCCESS The RNG value was returned >> successfully. >> + @retval EFI_UNSUPPORTED The algorithm specified by >> RNGAlgorithm is not supported by >> + this driver. >> + @retval EFI_DEVICE_ERROR An RNG value could not be retrieved >> due to a hardware or >> + firmware error. >> + @retval EFI_NOT_READY There is not enough random data >> available to satisfy the length >> + requested by RNGValueLength. >> + @retval EFI_INVALID_PARAMETER RNGValue is NULL or RNGValueLength is >> zero. >> + >> +**/ >> +STATIC >> +EFI_STATUS >> +EFIAPI >> +VirtioRngGetRNG ( >> + IN EFI_RNG_PROTOCOL *This, >> + IN EFI_RNG_ALGORITHM *RNGAlgorithm, OPTIONAL >> + IN UINTN RNGValueLength, >> + OUT UINT8 *RNGValue >> + ) >> +{ >> + VIRTIO_RNG_DEV *Dev; >> + DESC_INDICES Indices; >> + >> + ASSERT (This != NULL); >> + ASSERT (RNGValue != NULL); >> + >> + // >> + // We only support the raw algorithm, so reject requests for anything else >> + // >> + if (RNGAlgorithm && !CompareGuid (RNGAlgorithm, &gEfiRngAlgorithmRaw)) { >> + return EFI_UNSUPPORTED; >> + } >> + >> + Dev = VIRTIO_ENTROPY_SOURCE_FROM_RNG (This); >> + >> + VirtioPrepare (&Dev->Ring, &Indices); >> + VirtioAppendDesc (&Dev->Ring, >> + (UINTN) RNGValue, >> + RNGValueLength, >> + VRING_DESC_F_WRITE, >> + &Indices); >> + >> + if (VirtioFlush (Dev->VirtIo, 0, &Dev->Ring, &Indices) != EFI_SUCCESS) { >> + return EFI_DEVICE_ERROR; >> + } >> + return EFI_SUCCESS; >> +} >> + >> +STATIC >> +EFI_STATUS >> +EFIAPI >> +VirtioRngInit ( >> + IN OUT VIRTIO_RNG_DEV *Dev >> + ) >> +{ >> + UINT8 NextDevStat; >> + EFI_STATUS Status; >> + UINT16 QueueSize; >> + >> + // >> + // Execute virtio-0.9.5, 2.2.1 Device Initialization Sequence. >> + // >> + NextDevStat = 0; // step 1 -- reset device >> + Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat); >> + if (EFI_ERROR (Status)) { >> + goto Failed; >> + } >> + >> + NextDevStat |= VSTAT_ACK; // step 2 -- acknowledge device presence >> + Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat); >> + if (EFI_ERROR (Status)) { >> + goto Failed; >> + } >> + >> + NextDevStat |= VSTAT_DRIVER; // step 3 -- we know how to drive it >> + Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat); >> + if (EFI_ERROR (Status)) { >> + goto Failed; >> + } >> + >> + // >> + // Set Page Size - MMIO VirtIo Specific >> + // >> + Status = Dev->VirtIo->SetPageSize (Dev->VirtIo, EFI_PAGE_SIZE); >> + if (EFI_ERROR (Status)) { >> + goto Failed; >> + } >> + >> + // >> + // allocate request virtqueue, just use #0 >> + // >> + Status = Dev->VirtIo->SetQueueSel (Dev->VirtIo, 0); >> + if (EFI_ERROR (Status)) { >> + goto Failed; >> + } >> + Status = Dev->VirtIo->GetQueueNumMax (Dev->VirtIo, &QueueSize); >> + if (EFI_ERROR (Status)) { >> + goto Failed; >> + } >> + >> + // >> + // Single queue required >> + // >> + if (QueueSize < 1) { >> + Status = EFI_UNSUPPORTED; >> + goto Failed; >> + } >> + >> + Status = VirtioRingInit (QueueSize, &Dev->Ring); >> + if (EFI_ERROR (Status)) { >> + goto Failed; >> + } >> + >> + // >> + // Additional steps for MMIO: align the queue appropriately, and set the >> + // size. If anything fails from here on, we must release the ring >> resources. >> + // >> + Status = Dev->VirtIo->SetQueueNum (Dev->VirtIo, QueueSize); >> + if (EFI_ERROR (Status)) { >> + goto ReleaseQueue; >> + } >> + >> + Status = Dev->VirtIo->SetQueueAlign (Dev->VirtIo, EFI_PAGE_SIZE); >> + if (EFI_ERROR (Status)) { >> + goto ReleaseQueue; >> + } >> + >> + // >> + // Report GPFN (guest-physical frame number) of queue. >> + // >> + Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo, >> + (UINT32) ((UINTN) Dev->Ring.Base >> EFI_PAGE_SHIFT)); >> + if (EFI_ERROR (Status)) { >> + goto ReleaseQueue; >> + } >> + >> + // >> + // initialization complete >> + // >> + NextDevStat |= VSTAT_DRIVER_OK; >> + Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat); >> + if (EFI_ERROR (Status)) { >> + goto ReleaseQueue; >> + } >> + >> + // >> + // populate the exported interface's attributes >> + // >> + Dev->Rng.GetInfo = VirtioRngGetInfo; >> + Dev->Rng.GetRNG = VirtioRngGetRNG; >> + >> + return EFI_SUCCESS; >> + >> +ReleaseQueue: >> + VirtioRingUninit (&Dev->Ring); >> + >> +Failed: >> + // >> + // Notify the host about our failure to setup: virtio-0.9.5, 2.2.2.1 >> Device >> + // Status. VirtIo access failure here should not mask the original error. >> + // >> + NextDevStat |= VSTAT_FAILED; >> + Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat); >> + >> + return Status; // reached only via Failed above >> +} >> + >> + >> +STATIC >> +VOID >> +EFIAPI >> +VirtioRngUninit ( >> + IN OUT VIRTIO_RNG_DEV *Dev >> + ) >> +{ >> + // >> + // Reset the virtual device -- see virtio-0.9.5, 2.2.2.1 Device Status. >> When >> + // VIRTIO_CFG_WRITE() returns, the host will have learned to stay away >> from >> + // the old comms area. >> + // >> + Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0); >> + VirtioRingUninit (&Dev->Ring); >> +} >> + >> +// >> +// Event notification function enqueued by ExitBootServices(). >> +// >> + >> +STATIC >> +VOID >> +EFIAPI >> +VirtioRngExitBoot ( >> + IN EFI_EVENT Event, >> + IN VOID *Context >> + ) >> +{ >> + VIRTIO_RNG_DEV *Dev; >> + >> + // >> + // Reset the device. This causes the hypervisor to forget about the virtio >> + // ring. >> + // >> + // We allocated said ring in EfiBootServicesData type memory, and code >> + // executing after ExitBootServices() is permitted to overwrite it. >> + // >> + Dev = Context; >> + Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0); >> +} >> + >> + >> +// >> +// Probe, start and stop functions of this driver, called by the DXE core >> for >> +// specific devices. >> +// >> +// The following specifications document these interfaces: >> +// - Driver Writer's Guide for UEFI 2.3.1 v1.01, 9 Driver Binding Protocol >> +// - UEFI Spec 2.3.1 + Errata C, 10.1 EFI Driver Binding Protocol >> +// >> +// The implementation follows: >> +// - Driver Writer's Guide for UEFI 2.3.1 v1.01 >> +// - 5.1.3.4 OpenProtocol() and CloseProtocol() >> +// - UEFI Spec 2.3.1 + Errata C >> +// - 6.3 Protocol Handler Services >> +// >> + >> +EFI_STATUS >> +EFIAPI >> +VirtioRngDriverBindingSupported ( >> + IN EFI_DRIVER_BINDING_PROTOCOL *This, >> + IN EFI_HANDLE DeviceHandle, >> + IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath >> + ) >> +{ >> + EFI_STATUS Status; >> + VIRTIO_DEVICE_PROTOCOL *VirtIo; >> + >> + // >> + // Attempt to open the device with the VirtIo set of interfaces. On >> success, >> + // the protocol is "instantiated" for the VirtIo device. Covers duplicate >> open >> + // attempts (EFI_ALREADY_STARTED). >> + // >> + Status = gBS->OpenProtocol ( >> + DeviceHandle, // candidate device >> + &gVirtioDeviceProtocolGuid, // for generic VirtIo access >> + (VOID **)&VirtIo, // handle to instantiate >> + This->DriverBindingHandle, // requestor driver identity >> + DeviceHandle, // ControllerHandle, >> according to >> + // the UEFI Driver Model >> + EFI_OPEN_PROTOCOL_BY_DRIVER // get exclusive VirtIo >> access to >> + // the device; to be released >> + ); >> + if (EFI_ERROR (Status)) { >> + return Status; >> + } >> + >> + if (VirtIo->SubSystemDeviceId != VIRTIO_SUBSYSTEM_ENTROPY_SOURCE) { >> + Status = EFI_UNSUPPORTED; >> + } >> + >> + // >> + // We needed VirtIo access only transitorily, to see whether we support >> the >> + // device or not. >> + // >> + gBS->CloseProtocol (DeviceHandle, &gVirtioDeviceProtocolGuid, >> + This->DriverBindingHandle, DeviceHandle); >> + return Status; >> +} >> + >> + >> +EFI_STATUS >> +EFIAPI >> +VirtioRngDriverBindingStart ( >> + IN EFI_DRIVER_BINDING_PROTOCOL *This, >> + IN EFI_HANDLE DeviceHandle, >> + IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath >> + ) >> +{ >> + VIRTIO_RNG_DEV *Dev; >> + EFI_STATUS Status; >> + >> + Dev = (VIRTIO_RNG_DEV *) AllocateZeroPool (sizeof *Dev); >> + if (Dev == NULL) { >> + return EFI_OUT_OF_RESOURCES; >> + } >> + >> + Status = gBS->OpenProtocol (DeviceHandle, &gVirtioDeviceProtocolGuid, >> + (VOID **)&Dev->VirtIo, This->DriverBindingHandle, >> + DeviceHandle, EFI_OPEN_PROTOCOL_BY_DRIVER); >> + if (EFI_ERROR (Status)) { >> + goto FreeVirtioRng; >> + } >> + >> + // >> + // VirtIo access granted, configure virtio-rng device. >> + // >> + Status = VirtioRngInit (Dev); >> + if (EFI_ERROR (Status)) { >> + goto CloseVirtIo; >> + } >> + >> + Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_CALLBACK, >> + &VirtioRngExitBoot, Dev, &Dev->ExitBoot); >> + if (EFI_ERROR (Status)) { >> + goto UninitDev; >> + } >> + >> + // >> + // Setup complete, attempt to export the driver instance's >> EFI_RNG_PROTOCOL >> + // interface. >> + // >> + Dev->Signature = VIRTIO_RNG_SIG; >> + Status = gBS->InstallProtocolInterface (&DeviceHandle, >> + &gEfiRngProtocolGuid, EFI_NATIVE_INTERFACE, >> + &Dev->Rng); >> + if (EFI_ERROR (Status)) { >> + goto CloseExitBoot; >> + } >> + >> + return EFI_SUCCESS; >> + >> +CloseExitBoot: >> + gBS->CloseEvent (Dev->ExitBoot); >> + >> +UninitDev: >> + VirtioRngUninit (Dev); >> + >> +CloseVirtIo: >> + gBS->CloseProtocol (DeviceHandle, &gVirtioDeviceProtocolGuid, >> + This->DriverBindingHandle, DeviceHandle); >> + >> +FreeVirtioRng: >> + FreePool (Dev); >> + >> + return Status; >> +} >> + >> + >> +EFI_STATUS >> +EFIAPI >> +VirtioRngDriverBindingStop ( >> + IN EFI_DRIVER_BINDING_PROTOCOL *This, >> + IN EFI_HANDLE DeviceHandle, >> + IN UINTN NumberOfChildren, >> + IN EFI_HANDLE *ChildHandleBuffer >> + ) >> +{ >> + EFI_STATUS Status; >> + EFI_RNG_PROTOCOL *Rng; >> + VIRTIO_RNG_DEV *Dev; >> + >> + Status = gBS->OpenProtocol ( >> + DeviceHandle, // candidate device >> + &gEfiRngProtocolGuid, // retrieve the RNG >> iface >> + (VOID **)&Rng, // target pointer >> + This->DriverBindingHandle, // requestor driver >> ident. >> + DeviceHandle, // lookup req. for dev. >> + EFI_OPEN_PROTOCOL_GET_PROTOCOL // lookup only, no new >> ref. >> + ); >> + if (EFI_ERROR (Status)) { >> + return Status; >> + } >> + >> + Dev = VIRTIO_ENTROPY_SOURCE_FROM_RNG (Rng); >> + >> + // >> + // Handle Stop() requests for in-use driver instances gracefully. >> + // >> + Status = gBS->UninstallProtocolInterface (DeviceHandle, >> + &gEfiRngProtocolGuid, &Dev->Rng); >> + if (EFI_ERROR (Status)) { >> + return Status; >> + } >> + >> + gBS->CloseEvent (Dev->ExitBoot); >> + >> + VirtioRngUninit (Dev); >> + >> + gBS->CloseProtocol (DeviceHandle, &gVirtioDeviceProtocolGuid, >> + This->DriverBindingHandle, DeviceHandle); >> + >> + FreePool (Dev); >> + >> + return EFI_SUCCESS; >> +} >> + >> + >> +// >> +// The static object that groups the Supported() (ie. probe), Start() and >> +// Stop() functions of the driver together. Refer to UEFI Spec 2.3.1 + >> Errata >> +// C, 10.1 EFI Driver Binding Protocol. >> +// >> +STATIC EFI_DRIVER_BINDING_PROTOCOL gDriverBinding = { >> + &VirtioRngDriverBindingSupported, >> + &VirtioRngDriverBindingStart, >> + &VirtioRngDriverBindingStop, >> + 0x10, // Version, must be in [0x10 .. 0xFFFFFFEF] for IHV-developed >> drivers >> + NULL, // ImageHandle, to be overwritten by >> + // EfiLibInstallDriverBindingComponentName2() in >> VirtioRngEntryPoint() >> + NULL // DriverBindingHandle, ditto >> +}; >> + >> + >> +// >> +// The purpose of the following scaffolding (EFI_COMPONENT_NAME_PROTOCOL and >> +// EFI_COMPONENT_NAME2_PROTOCOL implementation) is to format the driver's >> name >> +// in English, for display on standard console devices. This is recommended >> for >> +// UEFI drivers that follow the UEFI Driver Model. Refer to the Driver >> Writer's >> +// Guide for UEFI 2.3.1 v1.01, 11 UEFI Driver and Controller Names. >> +// >> + >> +STATIC >> +EFI_UNICODE_STRING_TABLE mDriverNameTable[] = { >> + { "eng;en", L"Virtio Random Number Generator Driver" }, >> + { NULL, NULL } >> +}; >> + >> +STATIC >> +EFI_COMPONENT_NAME_PROTOCOL gComponentName; >> + >> +EFI_STATUS >> +EFIAPI >> +VirtioRngGetDriverName ( >> + IN EFI_COMPONENT_NAME_PROTOCOL *This, >> + IN CHAR8 *Language, >> + OUT CHAR16 **DriverName >> + ) >> +{ >> + return LookupUnicodeString2 ( >> + Language, >> + This->SupportedLanguages, >> + mDriverNameTable, >> + DriverName, >> + (BOOLEAN)(This == &gComponentName) // Iso639Language >> + ); >> +} >> + >> +EFI_STATUS >> +EFIAPI >> +VirtioRngGetDeviceName ( >> + IN EFI_COMPONENT_NAME_PROTOCOL *This, >> + IN EFI_HANDLE DeviceHandle, >> + IN EFI_HANDLE ChildHandle, >> + IN CHAR8 *Language, >> + OUT CHAR16 **ControllerName >> + ) >> +{ >> + return EFI_UNSUPPORTED; >> +} >> + >> +STATIC >> +EFI_COMPONENT_NAME_PROTOCOL gComponentName = { >> + &VirtioRngGetDriverName, >> + &VirtioRngGetDeviceName, >> + "eng" // SupportedLanguages, ISO 639-2 language codes >> +}; >> + >> +STATIC >> +EFI_COMPONENT_NAME2_PROTOCOL gComponentName2 = { >> + (EFI_COMPONENT_NAME2_GET_DRIVER_NAME) &VirtioRngGetDriverName, >> + (EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME) &VirtioRngGetDeviceName, >> + "en" // SupportedLanguages, RFC 4646 language codes >> +}; >> + >> + >> +// >> +// Entry point of this driver. >> +// >> +EFI_STATUS >> +EFIAPI >> +VirtioRngEntryPoint ( >> + IN EFI_HANDLE ImageHandle, >> + IN EFI_SYSTEM_TABLE *SystemTable >> + ) >> +{ >> + return EfiLibInstallDriverBindingComponentName2 ( >> + ImageHandle, >> + SystemTable, >> + &gDriverBinding, >> + ImageHandle, >> + &gComponentName, >> + &gComponentName2 >> + ); >> +} >> diff --git a/OvmfPkg/VirtioRngDxe/VirtioRngDxe.inf >> b/OvmfPkg/VirtioRngDxe/VirtioRngDxe.inf >> new file mode 100644 >> index 000000000000..471beb37bc7f >> --- /dev/null >> +++ b/OvmfPkg/VirtioRngDxe/VirtioRngDxe.inf >> @@ -0,0 +1,45 @@ >> +## @file >> +# This driver produces EFI_RNG_PROTOCOL instances for virtio-rng devices. >> +# >> +# Copyright (C) 2016, Linaro Ltd. >> +# >> +# This program and the accompanying materials are licensed and made >> available >> +# under the terms and conditions of the BSD License which accompanies this >> +# distribution. The full text of the license may be found at >> +# http://opensource.org/licenses/bsd-license.php >> +# >> +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, >> WITHOUT >> +# WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. >> +# >> +## >> + >> +[Defines] >> + INF_VERSION = 0x00010005 >> + BASE_NAME = VirtioRngDxe >> + FILE_GUID = 58E26F0D-CBAC-4BBA-B70F-18221415665A >> + MODULE_TYPE = UEFI_DRIVER >> + VERSION_STRING = 1.0 >> + ENTRY_POINT = VirtioRngEntryPoint >> + >> +[Sources] >> + VirtioRng.c >> + >> +[Packages] >> + MdePkg/MdePkg.dec >> + OvmfPkg/OvmfPkg.dec >> + >> +[LibraryClasses] >> + BaseMemoryLib >> + DebugLib >> + MemoryAllocationLib >> + UefiBootServicesTableLib >> + UefiDriverEntryPoint >> + UefiLib >> + VirtioLib >> + >> +[Protocols] >> + gEfiRngProtocolGuid ## BY_START >> + gVirtioDeviceProtocolGuid ## TO_START >> + >> +[Guids] >> + gEfiRngAlgorithmRaw >> > _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
