/**@file\r
Xen Platform PEI support\r
\r
- Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r
Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>\r
\r
- This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/MemoryAllocationLib.h>\r
#include <Library/PcdLib.h>\r
#include <Guid/XenInfo.h>\r
+#include <IndustryStandard/E820.h>\r
+#include <Library/ResourcePublicationLib.h>\r
+#include <Library/MtrrLib.h>\r
\r
#include "Platform.h"\r
+#include "Xen.h"\r
+\r
+BOOLEAN mXen = FALSE;\r
+\r
+STATIC UINT32 mXenLeaf = 0;\r
\r
EFI_XEN_INFO mXenInfo;\r
\r
+/**\r
+ Returns E820 map provided by Xen\r
+\r
+ @param Entries Pointer to E820 map\r
+ @param Count Number of entries\r
+\r
+ @return EFI_STATUS\r
+**/\r
+EFI_STATUS\r
+XenGetE820Map (\r
+ EFI_E820_ENTRY64 **Entries,\r
+ UINT32 *Count\r
+ )\r
+{\r
+ EFI_XEN_OVMF_INFO *Info =\r
+ (EFI_XEN_OVMF_INFO *)(UINTN) OVMF_INFO_PHYSICAL_ADDRESS;\r
+\r
+ if (AsciiStrCmp ((CHAR8 *) Info->Signature, "XenHVMOVMF")) {\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ ASSERT (Info->E820 < MAX_ADDRESS);\r
+ *Entries = (EFI_E820_ENTRY64 *)(UINTN) Info->E820;\r
+ *Count = Info->E820EntriesCount;\r
+\r
+ return EFI_SUCCESS;\r
+}\r
\r
/**\r
Connects to the Hypervisor.\r
- \r
+\r
@param XenLeaf CPUID index used to connect.\r
\r
@return EFI_STATUS\r
mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);\r
mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);\r
\r
- /* TBD: Locate hvm_info and reserve it away. */\r
- mXenInfo.HvmInfo = NULL;\r
-\r
BuildGuidDataHob (\r
&gEfiXenInfoGuid,\r
&mXenInfo,\r
/**\r
Figures out if we are running inside Xen HVM.\r
\r
- @return UINT32 CPUID index used to connect to HV.\r
+ @retval TRUE Xen was detected\r
+ @retval FALSE Xen was not detected\r
\r
**/\r
-UINT32\r
+BOOLEAN\r
XenDetect (\r
VOID\r
)\r
{\r
-\r
- UINT32 XenLeaf;\r
UINT8 Signature[13];\r
\r
- for (XenLeaf = 0x40000000; XenLeaf < 0x40010000; XenLeaf += 0x100) {\r
- AsmCpuid (XenLeaf, NULL, (UINT32 *) &Signature[0],\r
+ if (mXenLeaf != 0) {\r
+ return TRUE;\r
+ }\r
+\r
+ Signature[12] = '\0';\r
+ for (mXenLeaf = 0x40000000; mXenLeaf < 0x40010000; mXenLeaf += 0x100) {\r
+ AsmCpuid (mXenLeaf,\r
+ NULL,\r
+ (UINT32 *) &Signature[0],\r
(UINT32 *) &Signature[4],\r
(UINT32 *) &Signature[8]);\r
- Signature[12] = '\0';\r
\r
if (!AsciiStrCmp ((CHAR8 *) Signature, "XenVMMXenVMM")) {\r
- return XenLeaf;\r
+ mXen = TRUE;\r
+ return TRUE;\r
}\r
}\r
\r
- return 0;\r
+ mXenLeaf = 0;\r
+ return FALSE;\r
}\r
\r
+\r
+VOID\r
+XenPublishRamRegions (\r
+ VOID\r
+ )\r
+{\r
+ EFI_E820_ENTRY64 *E820Map;\r
+ UINT32 E820EntriesCount;\r
+ EFI_STATUS Status;\r
+\r
+ if (!mXen) {\r
+ return;\r
+ }\r
+\r
+ DEBUG ((EFI_D_INFO, "Using memory map provided by Xen\n"));\r
+\r
+ //\r
+ // Parse RAM in E820 map\r
+ //\r
+ E820EntriesCount = 0;\r
+ Status = XenGetE820Map (&E820Map, &E820EntriesCount);\r
+\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ if (E820EntriesCount > 0) {\r
+ EFI_E820_ENTRY64 *Entry;\r
+ UINT32 Loop;\r
+\r
+ for (Loop = 0; Loop < E820EntriesCount; Loop++) {\r
+ Entry = E820Map + Loop;\r
+\r
+ //\r
+ // Only care about RAM\r
+ //\r
+ if (Entry->Type != EfiAcpiAddressRangeMemory) {\r
+ continue;\r
+ }\r
+\r
+ AddMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);\r
+\r
+ MtrrSetMemoryAttribute (Entry->BaseAddr, Entry->Length, CacheWriteBack);\r
+ }\r
+ }\r
+}\r
+\r
+\r
/**\r
Perform Xen PEI initialization.\r
\r
**/\r
EFI_STATUS\r
InitializeXen (\r
- UINT32 XenLeaf\r
+ VOID\r
)\r
{\r
- XenConnect (XenLeaf);\r
+ RETURN_STATUS PcdStatus;\r
+\r
+ if (mXenLeaf == 0) {\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ XenConnect (mXenLeaf);\r
\r
//\r
// Reserve away HVMLOADER reserved memory [0xFC000000,0xFD000000).\r
// This needs to match HVMLOADER RESERVED_MEMBASE/RESERVED_MEMSIZE.\r
//\r
- AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000);\r
+ AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000, FALSE);\r
+\r
+ PcdStatus = PcdSetBoolS (PcdPciDisableBusEnumeration, TRUE);\r
+ ASSERT_RETURN_ERROR (PcdStatus);\r
\r
return EFI_SUCCESS;\r
}\r