diff options
Diffstat (limited to 'OvmfPkg/XenPlatformPei')
| -rw-r--r-- | OvmfPkg/XenPlatformPei/Xen.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/OvmfPkg/XenPlatformPei/Xen.c b/OvmfPkg/XenPlatformPei/Xen.c index f4d0d1c73b..9962fe9fc7 100644 --- a/OvmfPkg/XenPlatformPei/Xen.c +++ b/OvmfPkg/XenPlatformPei/Xen.c @@ -33,6 +33,12 @@ STATIC UINT32 mXenLeaf = 0; EFI_XEN_INFO mXenInfo;
+//
+// Location of the firmware info struct setup by hvmloader.
+// Only the E820 table is used by OVMF.
+//
+EFI_XEN_OVMF_INFO *mXenHvmloaderInfo;
+
/**
Returns E820 map provided by Xen
@@ -78,6 +84,8 @@ XenConnect ( UINT32 TransferReg;
UINT32 TransferPages;
UINT32 XenVersion;
+ EFI_XEN_OVMF_INFO *Info;
+ CHAR8 Sig[sizeof (Info->Signature) + 1];
AsmCpuid (XenLeaf + 2, &TransferPages, &TransferReg, NULL, NULL);
mXenInfo.HyperPages = AllocatePages (TransferPages);
@@ -97,8 +105,21 @@ XenConnect ( mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);
mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);
- /* TBD: Locate hvm_info and reserve it away. */
- mXenInfo.HvmInfo = NULL;
+ //
+ // Check if there are information left by hvmloader
+ //
+
+ Info = (EFI_XEN_OVMF_INFO *)(UINTN) OVMF_INFO_PHYSICAL_ADDRESS;
+ //
+ // Copy the signature, and make it null-terminated.
+ //
+ AsciiStrnCpyS (Sig, sizeof (Sig), (CHAR8 *) &Info->Signature,
+ sizeof (Info->Signature));
+ if (AsciiStrCmp (Sig, "XenHVMOVMF") == 0) {
+ mXenHvmloaderInfo = Info;
+ } else {
+ mXenHvmloaderInfo = NULL;
+ }
BuildGuidDataHob (
&gEfiXenInfoGuid,
|