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OvmfPkg/QemuKernelLoaderFsDxe: don't expose kernel command line

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We have no need for exposing the kernel command line as a file,
so remove support for that. Since the remaining blobs (kernel
and initrd) are typically much larger than a page, switch to
the page based allocator for blobs at the same time.

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>
This commit is contained in:
Ard Biesheuvel
2020-02-28 22:38:50 +01:00
committed by mergify[bot]
parent 364e0b4cda
commit efc52d67e1
1 changed files with 3 additions and 4 deletions
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7
OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
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@@ -30,7 +30,6 @@
typedef enum {
KernelBlobTypeKernel,
KernelBlobTypeInitrd,
KernelBlobTypeCommandLine,
KernelBlobTypeMax
} KERNEL_BLOB_TYPE;
@@ -45,7 +44,6 @@ typedef struct {
STATIC KERNEL_BLOB mKernelBlob[KernelBlobTypeMax] = {
{ QemuFwCfgItemKernelSize, QemuFwCfgItemKernelData, L"kernel" },
{ QemuFwCfgItemInitrdSize, QemuFwCfgItemInitrdData, L"initrd" },
{ QemuFwCfgItemCommandLineSize, QemuFwCfgItemCommandLineData, L"cmdline" }
};
STATIC UINT64 mTotalBlobBytes;
@@ -865,7 +863,7 @@ FetchBlob (
//
// Read blob.
//
Blob->Data = AllocatePool (Blob->Size);
Blob->Data = AllocatePages (EFI_SIZE_TO_PAGES ((UINTN)Blob->Size));
if (Blob->Data == NULL) {
DEBUG ((DEBUG_ERROR, "%a: failed to allocate %Ld bytes for \"%s\"\n",
__FUNCTION__, (INT64)Blob->Size, Blob->Name));
@@ -969,7 +967,8 @@ FreeBlobs:
while (BlobType > 0) {
CurrentBlob = &mKernelBlob[--BlobType];
if (CurrentBlob->Data != NULL) {
FreePool (CurrentBlob->Data);
FreePages (CurrentBlob->Data,
EFI_SIZE_TO_PAGES ((UINTN)CurrentBlob->Size));
CurrentBlob->Size = 0;
CurrentBlob->Data = NULL;
}