Needed for hardware detection: virtio-mmio devices for now, later also pcie root bridge.
Depends on patched qemu which actually provides an fdt: https://gitlab.com/kraxel/qemu/-/commits/sirius/microvm-device-tree https://bugzilla.tianocore.org/show_bug.cgi?id=3689 Signed-off-by: Gerd Hoffmann <kra...@redhat.com> --- OvmfPkg/PlatformPei/PlatformPei.inf | 1 + OvmfPkg/PlatformPei/Platform.c | 40 +++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/OvmfPkg/PlatformPei/PlatformPei.inf b/OvmfPkg/PlatformPei/PlatformPei.inf index 67eb7aa7166b..56876184b17a 100644 --- a/OvmfPkg/PlatformPei/PlatformPei.inf +++ b/OvmfPkg/PlatformPei/PlatformPei.inf @@ -44,6 +44,7 @@ [Packages] [Guids] gEfiMemoryTypeInformationGuid + gFdtHobGuid [LibraryClasses] BaseLib diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c index df2d9ad015aa..3c0cdba67c83 100644 --- a/OvmfPkg/PlatformPei/Platform.c +++ b/OvmfPkg/PlatformPei/Platform.c @@ -321,6 +321,45 @@ PciExBarInitialization ( ); } +VOID +MicrovmInitialization ( + VOID + ) +{ + FIRMWARE_CONFIG_ITEM FdtItem; + UINTN FdtSize; + UINTN FdtPages; + EFI_STATUS Status; + UINT64 *FdtHobData; + VOID *NewBase; + + Status = QemuFwCfgFindFile ("etc/fdt", &FdtItem, &FdtSize); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_INFO, "%a: no etc/fdt found in fw_cfg\n", __FUNCTION__)); + return; + } + + FdtPages = EFI_SIZE_TO_PAGES (FdtSize); + NewBase = AllocatePages (FdtPages); + if (NewBase == NULL) { + DEBUG ((DEBUG_INFO, "%a: AllocatePages failed\n", __FUNCTION__)); + return; + } + + QemuFwCfgSelectItem (FdtItem); + QemuFwCfgReadBytes (FdtSize, NewBase); + + FdtHobData = BuildGuidHob (&gFdtHobGuid, sizeof (*FdtHobData)); + if (FdtHobData == NULL) { + DEBUG ((DEBUG_INFO, "%a: BuildGuidHob failed\n", __FUNCTION__)); + return; + } + + DEBUG ((DEBUG_INFO, "%a: fdt at 0x%x (size %d)\n", __FUNCTION__, + NewBase, FdtSize)); + *FdtHobData = (UINTN)NewBase; +} + VOID MiscInitialization ( VOID @@ -368,6 +407,7 @@ MiscInitialization ( break; case 0xffff: /* microvm */ DEBUG ((DEBUG_INFO, "%a: microvm\n", __FUNCTION__)); + MicrovmInitialization(); PcdStatus = PcdSet16S (PcdOvmfHostBridgePciDevId, MICROVM_PSEUDO_DEVICE_ID); ASSERT_RETURN_ERROR (PcdStatus); -- 2.31.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#82036): https://edk2.groups.io/g/devel/message/82036 Mute This Topic: https://groups.io/mt/86316749/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
