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| author | Gerd Hoffmann <kraxel@redhat.com> | 2021-12-13 09:16:55 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-12-13 12:16:32 +0000 |
| commit | 79dcaf7054dbe90a30c7ce288b7f2ed882d96cf2 (patch) | |
| tree | a9d3619c06199057e2a70ba2322958b5de6397f4 /OvmfPkg | |
| parent | 64ef0dd1d3c0b8989c6a660fe0f0cba633093f57 (diff) | |
| download | edk2-79dcaf7054dbe90a30c7ce288b7f2ed882d96cf2.tar.gz edk2-79dcaf7054dbe90a30c7ce288b7f2ed882d96cf2.tar.bz2 edk2-79dcaf7054dbe90a30c7ce288b7f2ed882d96cf2.zip | |
OvmfPkg/Microvm/fdt: load fdt from fw_cfg
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
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3689
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/PlatformPei/Platform.c | 45 | ||||
| -rw-r--r-- | OvmfPkg/PlatformPei/PlatformPei.inf | 1 |
2 files changed, 46 insertions, 0 deletions
diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c index 906f64615d..c9ec1d7e99 100644 --- a/OvmfPkg/PlatformPei/Platform.c +++ b/OvmfPkg/PlatformPei/Platform.c @@ -322,6 +322,50 @@ 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 +412,7 @@ MiscInitialization ( break;
case 0xffff: /* microvm */
DEBUG ((DEBUG_INFO, "%a: microvm\n", __FUNCTION__));
+ MicrovmInitialization ();
PcdStatus = PcdSet16S (
PcdOvmfHostBridgePciDevId,
MICROVM_PSEUDO_DEVICE_ID
diff --git a/OvmfPkg/PlatformPei/PlatformPei.inf b/OvmfPkg/PlatformPei/PlatformPei.inf index 1c56ba2758..8ef404168c 100644 --- a/OvmfPkg/PlatformPei/PlatformPei.inf +++ b/OvmfPkg/PlatformPei/PlatformPei.inf @@ -44,6 +44,7 @@ [Guids]
gEfiMemoryTypeInformationGuid
+ gFdtHobGuid
[LibraryClasses]
BaseLib
|