diff options
| -rw-r--r-- | OvmfPkg/Csm/LegacyBiosDxe/LegacyBootSupport.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBootSupport.c b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBootSupport.c index 211750c012..cd4cd24f42 100644 --- a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBootSupport.c +++ b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBootSupport.c @@ -928,7 +928,9 @@ GenericLegacyBoot ( if (CopySize > Private->Legacy16Table->E820Length) {
ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
Regs.X.AX = Legacy16GetTableAddress;
+ Regs.X.BX = (UINT16) 0x0; // Any region
Regs.X.CX = (UINT16) CopySize;
+ Regs.X.DX = (UINT16) 0x4; // Alignment
Private->LegacyBios.FarCall86 (
&Private->LegacyBios,
Private->Legacy16Table->Compatibility16CallSegment,
@@ -942,6 +944,7 @@ GenericLegacyBoot ( Private->Legacy16Table->E820Length = (UINT32) CopySize;
if (Regs.X.AX != 0) {
DEBUG ((EFI_D_ERROR, "Legacy16 E820 length insufficient\n"));
+ return EFI_OUT_OF_RESOURCES;
} else {
CopyMem (
(VOID *)(UINTN) Private->Legacy16Table->E820Pointer,
|