[PATCH v3 07/14] OvmfPkg/QemuKernelLoaderFsDxe: don't expose kernel command line

["Ard Biesheuvel" <ard.biesheuvel@linaro.org>]

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>
---
 OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
index e4539ec2fbe5..dc86a48af378 100644
--- a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
+++ b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
@@ -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 @@ QemuKernelLoaderFsDxeEntrypoint (
   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;
     }
-- 
2.17.1