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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2020-02-28 23:15:22 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-03-05 19:45:05 +0000 |
| commit | 0758a8e979be2eb86130c759942afa35b6b2e56d (patch) | |
| tree | 1432048edddd1ddaf756b30524e158fe17196fde /OvmfPkg/QemuKernelLoaderFsDxe | |
| parent | efc52d67e1573ce174d301b52fa1577d552c8441 (diff) | |
| download | edk2-0758a8e979be2eb86130c759942afa35b6b2e56d.tar.gz edk2-0758a8e979be2eb86130c759942afa35b6b2e56d.tar.bz2 edk2-0758a8e979be2eb86130c759942afa35b6b2e56d.zip | |
OvmfPkg/QemuKernelLoaderFsDxe: add support for the kernel setup block
On x86, the kernel image consists of a setup block and the actual kernel,
and QEMU presents these as separate blobs, whereas on disk (and in terms
of PE/COFF image signing), they consist of a single image.
So add support to our FS loader driver to expose files via the abstract
file system that consist of up to two concatenated blobs, and redefine
the kernel file so it consists of the setup and kernel blobs, on every
architecture (on non-x86, the setup block is simply 0 bytes and is
therefore ignored implicitly)
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2566
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg/QemuKernelLoaderFsDxe')
| -rw-r--r-- | OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c | 74 |
1 files changed, 53 insertions, 21 deletions
diff --git a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c index dc86a48af3..8ccb198317 100644 --- a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c +++ b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c @@ -34,16 +34,29 @@ typedef enum { } KERNEL_BLOB_TYPE;
typedef struct {
- FIRMWARE_CONFIG_ITEM CONST SizeKey;
- FIRMWARE_CONFIG_ITEM CONST DataKey;
- CONST CHAR16 * CONST Name;
- UINT32 Size;
- UINT8 *Data;
+ CONST CHAR16 Name[8];
+ struct {
+ FIRMWARE_CONFIG_ITEM CONST SizeKey;
+ FIRMWARE_CONFIG_ITEM CONST DataKey;
+ UINT32 Size;
+ } FwCfgItem[2];
+ UINT32 Size;
+ UINT8 *Data;
} KERNEL_BLOB;
STATIC KERNEL_BLOB mKernelBlob[KernelBlobTypeMax] = {
- { QemuFwCfgItemKernelSize, QemuFwCfgItemKernelData, L"kernel" },
- { QemuFwCfgItemInitrdSize, QemuFwCfgItemInitrdData, L"initrd" },
+ {
+ L"kernel",
+ {
+ { QemuFwCfgItemKernelSetupSize, QemuFwCfgItemKernelSetupData, },
+ { QemuFwCfgItemKernelSize, QemuFwCfgItemKernelData, },
+ }
+ }, {
+ L"initrd",
+ {
+ { QemuFwCfgItemInitrdSize, QemuFwCfgItemInitrdData, },
+ }
+ }
};
STATIC UINT64 mTotalBlobBytes;
@@ -850,12 +863,21 @@ FetchBlob ( )
{
UINT32 Left;
+ UINTN Idx;
+ UINT8 *ChunkData;
//
// Read blob size.
//
- QemuFwCfgSelectItem (Blob->SizeKey);
- Blob->Size = QemuFwCfgRead32 ();
+ Blob->Size = 0;
+ for (Idx = 0; Idx < ARRAY_SIZE (Blob->FwCfgItem); Idx++) {
+ if (Blob->FwCfgItem[Idx].SizeKey == 0) {
+ break;
+ }
+ QemuFwCfgSelectItem (Blob->FwCfgItem[Idx].SizeKey);
+ Blob->FwCfgItem[Idx].Size = QemuFwCfgRead32 ();
+ Blob->Size += Blob->FwCfgItem[Idx].Size;
+ }
if (Blob->Size == 0) {
return EFI_SUCCESS;
}
@@ -872,18 +894,28 @@ FetchBlob ( DEBUG ((DEBUG_INFO, "%a: loading %Ld bytes for \"%s\"\n", __FUNCTION__,
(INT64)Blob->Size, Blob->Name));
- QemuFwCfgSelectItem (Blob->DataKey);
-
- Left = Blob->Size;
- do {
- UINT32 Chunk;
-
- Chunk = (Left < SIZE_1MB) ? Left : SIZE_1MB;
- QemuFwCfgReadBytes (Chunk, Blob->Data + (Blob->Size - Left));
- Left -= Chunk;
- DEBUG ((DEBUG_VERBOSE, "%a: %Ld bytes remaining for \"%s\"\n",
- __FUNCTION__, (INT64)Left, Blob->Name));
- } while (Left > 0);
+
+ ChunkData = Blob->Data;
+ for (Idx = 0; Idx < ARRAY_SIZE (Blob->FwCfgItem); Idx++) {
+ if (Blob->FwCfgItem[Idx].DataKey == 0) {
+ break;
+ }
+ QemuFwCfgSelectItem (Blob->FwCfgItem[Idx].DataKey);
+
+ Left = Blob->FwCfgItem[Idx].Size;
+ while (Left > 0) {
+ UINT32 Chunk;
+
+ Chunk = (Left < SIZE_1MB) ? Left : SIZE_1MB;
+ QemuFwCfgReadBytes (Chunk, ChunkData + Blob->FwCfgItem[Idx].Size - Left);
+ Left -= Chunk;
+ DEBUG ((DEBUG_VERBOSE, "%a: %Ld bytes remaining for \"%s\" (%d)\n",
+ __FUNCTION__, (INT64)Left, Blob->Name, (INT32)Idx));
+ }
+
+ ChunkData += Blob->FwCfgItem[Idx].Size;
+ }
+
return EFI_SUCCESS;
}
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