Re: [PATCH v2 1/3] Revert "OvmfPkg/QemuKernelLoaderFsDxe: don't expose kernel command line"


Laszlo Ersek
 

On 06/17/21 14:16, Dov Murik wrote:
This reverts commit efc52d67e1573ce174d301b52fa1577d552c8441.

Manually fixed conflicts in:
OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c

Note that besides re-exposing the kernel command line as a file in the
synthetic filesystem, we also revert back to AllocatePool instead of
AllocatePages.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Tobin Feldman-Fitzthum <tobin@linux.ibm.com>
Signed-off-by: Dov Murik <dovmurik@linux.ibm.com>
---
OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
(1) The bugzilla ticket should be referenced in the commit message,
above your signoff:

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3457

With that update:

Reviewed-by: Laszlo Ersek <lersek@redhat.com>

Thanks,
Laszlo


diff --git a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
index b09ff6a3590d..c7ddd86f5c75 100644
--- a/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
+++ b/OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.c
@@ -33,6 +33,7 @@
typedef enum {
KernelBlobTypeKernel,
KernelBlobTypeInitrd,
+ KernelBlobTypeCommandLine,
KernelBlobTypeMax
} KERNEL_BLOB_TYPE;

@@ -59,6 +60,11 @@ STATIC KERNEL_BLOB mKernelBlob[KernelBlobTypeMax] = {
{
{ QemuFwCfgItemInitrdSize, QemuFwCfgItemInitrdData, },
}
+ }, {
+ L"cmdline",
+ {
+ { QemuFwCfgItemCommandLineSize, QemuFwCfgItemCommandLineData, },
+ }
}
};

@@ -948,7 +954,7 @@ FetchBlob (
//
// Read blob.
//
- Blob->Data = AllocatePages (EFI_SIZE_TO_PAGES ((UINTN)Blob->Size));
+ Blob->Data = AllocatePool (Blob->Size);
if (Blob->Data == NULL) {
DEBUG ((DEBUG_ERROR, "%a: failed to allocate %Ld bytes for \"%s\"\n",
__FUNCTION__, (INT64)Blob->Size, Blob->Name));
@@ -1083,8 +1089,7 @@ FreeBlobs:
while (BlobType > 0) {
CurrentBlob = &mKernelBlob[--BlobType];
if (CurrentBlob->Data != NULL) {
- FreePages (CurrentBlob->Data,
- EFI_SIZE_TO_PAGES ((UINTN)CurrentBlob->Size));
+ FreePool (CurrentBlob->Data);
CurrentBlob->Size = 0;
CurrentBlob->Data = NULL;
}

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