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EmbeddedPkg: Allow longer android kernel command line 

AndroidBootImgLib allows for platforms to append to kernel command
line but does not allow for the overall kernel command line to go
beyond the limit set by the image header. Address this limitation
by adding a pcd where platform can tell how many extra characters
they expect on their platform in addition to what the image header
specifies.

Signed-off-by: Ashish Singhal <ashishsingha@nvidia.com>
Reviewed-by: Abner Chang <abner.chang@amd.com>
This commit is contained in:
Ashish Singhal 2023-11-29 20:51:53 -07:00 committed by mergify[bot]
parent c0207583e0
commit 59b6b5059b
3 changed files with 8 additions and 2 deletions
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5
EmbeddedPkg/EmbeddedPkg.dec
View File

@ -183,3 +183,8 @@
# Selection between DT and ACPI as a default
#
gEmbeddedTokenSpaceGuid.PcdDefaultDtPref|TRUE|BOOLEAN|0x0000059
#
# Expected Overflow Android Kernel Command Line Characters
#
gEmbeddedTokenSpaceGuid.PcdAndroidKernelCommandLineOverflow|0|UINT32|0x000005C

2
EmbeddedPkg/Library/AndroidBootImgLib/AndroidBootImgLib.c
View File

@ -335,7 +335,7 @@ AndroidBootImgUpdateArgs (
return Status;
}
NewKernelArgSize = ANDROID_BOOTIMG_KERNEL_ARGS_SIZE;
NewKernelArgSize = ANDROID_BOOTIMG_KERNEL_ARGS_SIZE + PcdGet32 (PcdAndroidKernelCommandLineOverflow);
*KernelArgs = AllocateZeroPool (sizeof (CHAR16) * NewKernelArgSize);
if (*KernelArgs == NULL) {
DEBUG ((DEBUG_ERROR, "Fail to allocate memory\n"));

3
EmbeddedPkg/Library/AndroidBootImgLib/AndroidBootImgLib.inf
View File

@ -45,5 +45,6 @@
gEfiAcpiTableGuid
gFdtTableGuid
[FeaturePcd]
[Pcd]
gEmbeddedTokenSpaceGuid.PcdAndroidBootLoadFile2
gEmbeddedTokenSpaceGuid.PcdAndroidKernelCommandLineOverflow