This function parses Xen OVMF info and arrange memory maps accordingly.
Signed-off-by: Wei Liu <wei.l...@citrix.com>
---
OvmfPkg/PlatformPei/Platform.c | 83 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 81 insertions(+), 2 deletions(-)
diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index 9b7828f..ea5de66 100644
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -34,6 +34,10 @@
#include <Guid/MemoryTypeInformation.h>
#include <Ppi/MasterBootMode.h>
#include <IndustryStandard/Pci22.h>
+#include <Guid/XenInfo.h>
+#include <IndustryStandard/E820.h>
+#include <Library/ResourcePublicationLib.h>
+#include <Library/MtrrLib.h>
#include "Platform.h"
#include "Cmos.h"
@@ -163,6 +167,75 @@ AddUntestedMemoryRangeHob (
AddUntestedMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit -
MemoryBase));
}
+VOID
+XenMemMapInitialization (
+ VOID
+ )
+{
+ EFI_HOB_GUID_TYPE *GuidHob;
+ EFI_XEN_INFO *Info;
+
+ DEBUG ((EFI_D_ERROR, "Using memory map provided by Xen\n"));
+
+ GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
+
+ ASSERT (GuidHob != NULL);
+
+ Info = GET_GUID_HOB_DATA (GuidHob);
+
+ //
+ // Create Memory Type Information HOB
+ //
+ BuildGuidDataHob (
+ &gEfiMemoryTypeInformationGuid,
+ mDefaultMemoryTypeInformation,
+ sizeof(mDefaultMemoryTypeInformation)
+ );
+
+ //
+ // Add PCI IO Port space available for PCI resource allocations.
+ // IoResourceBase and IoResourceMax aren't actually necessary.
+ //
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_IO,
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
+ 0xC000,
+ 0x4000
+ );
+
+ //
+ // Video memory + Legacy BIOS region
+ //
+ AddIoMemoryRangeHob (0x0A0000, BASE_1MB);
+
+ AddIoMemoryBaseSizeHob (PcdGet32(PcdCpuLocalApicBaseAddress), SIZE_1MB);
+
+ //
+ // Parse RAM in E820 map
+ //
+ if (Info->E820EntryCount > 0) {
+ struct e820_entry *E820Map, *Entry;
+ UINT16 Loop;
+
+ E820Map = Info->E820;
+ for (Loop = 0; Loop < Info->E820EntryCount; Loop++) {
+ Entry = E820Map + Loop;
+
+ // only care about RAM
+ if (Entry->type != E820_RAM)
+ continue;
+
+ if (Entry->addr >= BASE_4GB)
+ AddUntestedMemoryBaseSizeHob (Entry->addr, Entry->size);
+ else
+ AddMemoryBaseSizeHob (Entry->addr, Entry->size);
+
+ MtrrSetMemoryAttribute (Entry->addr, Entry->size, CacheWriteBack);
+ }
+ }
+}
+
VOID
MemMapInitialization (
@@ -346,7 +419,10 @@ InitializePlatform (
XenLeaf = XenDetect ();
- TopOfMemory = MemDetect ();
+ if (XenLeaf == 0)
+ TopOfMemory = MemDetect ();
+ else
+ PublishPeiMemory ();
if (XenLeaf != 0) {
DEBUG ((EFI_D_INFO, "Xen was detected\n"));
@@ -357,7 +433,10 @@ InitializePlatform (
PeiFvInitialization ();
- MemMapInitialization (TopOfMemory);
+ if (XenLeaf != 0)
+ XenMemMapInitialization ();
+ else
+ MemMapInitialization (TopOfMemory);
MiscInitialization ();
--
1.7.10.4
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