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OvmfPkg LoadLinuxLib: Use kernel's EFI entry point where available

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Usage of the EFI entry point was made feasible in the kernel
x64 boot protocol 2.12 where a 32-bit & 64-bit entry point
became well defined.

http://git.kernel.org/linus/09c205af

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14132 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten
2013-02-14 19:21:39 +00:00
parent 25ca06f9a0
commit dd71f6e287
6 changed files with 107 additions and 7 deletions
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17
OvmfPkg/Library/LoadLinuxLib/Linux.c
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@@ -604,14 +604,11 @@ SetupGraphics (
STATIC
EFI_STATUS
SetupLinuxBootParams (
IN VOID *Kernel,
IN OUT struct boot_params *Bp
)
{
SetupGraphics (Bp);
Bp->hdr.code32_start = (UINT32)(UINTN) Kernel;
SetupLinuxMemmap (Bp);
return EFI_SUCCESS;
@@ -644,7 +641,19 @@ LoadLinux (
InitLinuxDescriptorTables ();
SetupLinuxBootParams (Kernel, (struct boot_params*) KernelSetup);
Bp->hdr.code32_start = (UINT32)(UINTN) Kernel;
if (Bp->hdr.version >= 0x20c && Bp->hdr.handover_offset &&
(Bp->hdr.load_flags & (sizeof (UINTN) == 4 ? BIT2 : BIT3))) {
DEBUG ((EFI_D_INFO, "Jumping to kernel EFI handover point at ofs %x\n", Bp->hdr.handover_offset));
DisableInterrupts ();
JumpToUefiKernel ((VOID*) gImageHandle, (VOID*) gST, KernelSetup, Kernel);
}
//
// Old kernels without EFI handover protocol
//
SetupLinuxBootParams (KernelSetup);
DEBUG ((EFI_D_INFO, "Jumping to kernel\n"));
DisableInterrupts ();