/**@file\r
Memory Detection for Virtual Machines.\r
\r
- Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\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
#include <Library/PeimEntryPoint.h>\r
#include <Library/ResourcePublicationLib.h>\r
#include <Library/MtrrLib.h>\r
+#include <Library/QemuFwCfgLib.h>\r
\r
#include "Platform.h"\r
#include "Cmos.h"\r
}\r
\r
\r
+/**\r
+ Return the highest address that DXE could possibly use, plus one.\r
+**/\r
+STATIC\r
+UINT64\r
+GetFirstNonAddress (\r
+ VOID\r
+ )\r
+{\r
+ UINT64 FirstNonAddress;\r
+ UINT64 Pci64Base, Pci64Size;\r
+ CHAR8 MbString[7 + 1];\r
+ EFI_STATUS Status;\r
+ FIRMWARE_CONFIG_ITEM FwCfgItem;\r
+ UINTN FwCfgSize;\r
+ UINT64 HotPlugMemoryEnd;\r
+\r
+ FirstNonAddress = BASE_4GB + GetSystemMemorySizeAbove4gb ();\r
+\r
+ //\r
+ // If DXE is 32-bit, then we're done; PciBusDxe will degrade 64-bit MMIO\r
+ // resources to 32-bit anyway. See DegradeResource() in\r
+ // "PciResourceSupport.c".\r
+ //\r
+#ifdef MDE_CPU_IA32\r
+ if (!FeaturePcdGet (PcdDxeIplSwitchToLongMode)) {\r
+ return FirstNonAddress;\r
+ }\r
+#endif\r
+\r
+ //\r
+ // Otherwise, in order to calculate the highest address plus one, we must\r
+ // consider the 64-bit PCI host aperture too. Fetch the default size.\r
+ //\r
+ Pci64Size = PcdGet64 (PcdPciMmio64Size);\r
+\r
+ //\r
+ // See if the user specified the number of megabytes for the 64-bit PCI host\r
+ // aperture. The number of non-NUL characters in MbString allows for\r
+ // 9,999,999 MB, which is approximately 10 TB.\r
+ //\r
+ // As signaled by the "X-" prefix, this knob is experimental, and might go\r
+ // away at any time.\r
+ //\r
+ Status = QemuFwCfgFindFile ("opt/ovmf/X-PciMmio64Mb", &FwCfgItem,\r
+ &FwCfgSize);\r
+ if (!EFI_ERROR (Status)) {\r
+ if (FwCfgSize >= sizeof MbString) {\r
+ DEBUG ((EFI_D_WARN,\r
+ "%a: ignoring malformed 64-bit PCI host aperture size from fw_cfg\n",\r
+ __FUNCTION__));\r
+ } else {\r
+ QemuFwCfgSelectItem (FwCfgItem);\r
+ QemuFwCfgReadBytes (FwCfgSize, MbString);\r
+ MbString[FwCfgSize] = '\0';\r
+ Pci64Size = LShiftU64 (AsciiStrDecimalToUint64 (MbString), 20);\r
+ }\r
+ }\r
+\r
+ if (Pci64Size == 0) {\r
+ if (mBootMode != BOOT_ON_S3_RESUME) {\r
+ DEBUG ((EFI_D_INFO, "%a: disabling 64-bit PCI host aperture\n",\r
+ __FUNCTION__));\r
+ PcdSet64 (PcdPciMmio64Size, 0);\r
+ }\r
+\r
+ //\r
+ // There's nothing more to do; the amount of memory above 4GB fully\r
+ // determines the highest address plus one. The memory hotplug area (see\r
+ // below) plays no role for the firmware in this case.\r
+ //\r
+ return FirstNonAddress;\r
+ }\r
+\r
+ //\r
+ // The "etc/reserved-memory-end" fw_cfg file, when present, contains an\r
+ // absolute, exclusive end address for the memory hotplug area. This area\r
+ // starts right at the end of the memory above 4GB. The 64-bit PCI host\r
+ // aperture must be placed above it.\r
+ //\r
+ Status = QemuFwCfgFindFile ("etc/reserved-memory-end", &FwCfgItem,\r
+ &FwCfgSize);\r
+ if (!EFI_ERROR (Status) && FwCfgSize == sizeof HotPlugMemoryEnd) {\r
+ QemuFwCfgSelectItem (FwCfgItem);\r
+ QemuFwCfgReadBytes (FwCfgSize, &HotPlugMemoryEnd);\r
+\r
+ ASSERT (HotPlugMemoryEnd >= FirstNonAddress);\r
+ FirstNonAddress = HotPlugMemoryEnd;\r
+ }\r
+\r
+ //\r
+ // SeaBIOS aligns both boundaries of the 64-bit PCI host aperture to 1GB, so\r
+ // that the host can map it with 1GB hugepages. Follow suit.\r
+ //\r
+ Pci64Base = ALIGN_VALUE (FirstNonAddress, (UINT64)SIZE_1GB);\r
+ Pci64Size = ALIGN_VALUE (Pci64Size, (UINT64)SIZE_1GB);\r
+\r
+ //\r
+ // The 64-bit PCI host aperture should also be "naturally" aligned. The\r
+ // alignment is determined by rounding the size of the aperture down to the\r
+ // next smaller or equal power of two. That is, align the aperture by the\r
+ // largest BAR size that can fit into it.\r
+ //\r
+ Pci64Base = ALIGN_VALUE (Pci64Base, GetPowerOfTwo64 (Pci64Size));\r
+\r
+ if (mBootMode != BOOT_ON_S3_RESUME) {\r
+ //\r
+ // The core PciHostBridgeDxe driver will automatically add this range to\r
+ // the GCD memory space map through our PciHostBridgeLib instance; here we\r
+ // only need to set the PCDs.\r
+ //\r
+ PcdSet64 (PcdPciMmio64Base, Pci64Base);\r
+ PcdSet64 (PcdPciMmio64Size, Pci64Size);\r
+ DEBUG ((EFI_D_INFO, "%a: Pci64Base=0x%Lx Pci64Size=0x%Lx\n",\r
+ __FUNCTION__, Pci64Base, Pci64Size));\r
+ }\r
+\r
+ //\r
+ // The useful address space ends with the 64-bit PCI host aperture.\r
+ //\r
+ FirstNonAddress = Pci64Base + Pci64Size;\r
+ return FirstNonAddress;\r
+}\r
+\r
+\r
/**\r
Initialize the mPhysMemAddressWidth variable, based on guest RAM size.\r
**/\r
// The DXL IPL keys off of the physical address bits advertized in the CPU\r
// HOB. To conserve memory, we calculate the minimum address width here.\r
//\r
- FirstNonAddress = BASE_4GB + GetSystemMemorySizeAbove4gb ();\r
+ FirstNonAddress = GetFirstNonAddress ();\r
mPhysMemAddressWidth = (UINT8)HighBitSet64 (FirstNonAddress);\r
\r
//\r
MemorySize = PcdGet32 (PcdS3AcpiReservedMemorySize);\r
} else {\r
LowerMemorySize = GetSystemMemorySizeBelow4gb ();\r
+ if (FeaturePcdGet (PcdSmmSmramRequire)) {\r
+ //\r
+ // TSEG is chipped from the end of low RAM\r
+ //\r
+ LowerMemorySize -= FixedPcdGet8 (PcdQ35TsegMbytes) * SIZE_1MB;\r
+ }\r
\r
PeiMemoryCap = GetPeiMemoryCap ();\r
DEBUG ((EFI_D_INFO, "%a: mPhysMemAddressWidth=%d PeiMemoryCap=%u KB\n",\r
//\r
// Determine the range of memory to use during PEI\r
//\r
- MemoryBase = PcdGet32 (PcdOvmfDxeMemFvBase) + PcdGet32 (PcdOvmfDxeMemFvSize);\r
+ // Technically we could lay the permanent PEI RAM over SEC's temporary\r
+ // decompression and scratch buffer even if "secure S3" is needed, since\r
+ // their lifetimes don't overlap. However, PeiFvInitialization() will cover\r
+ // RAM up to PcdOvmfDecompressionScratchEnd with an EfiACPIMemoryNVS memory\r
+ // allocation HOB, and other allocations served from the permanent PEI RAM\r
+ // shouldn't overlap with that HOB.\r
+ //\r
+ MemoryBase = mS3Supported && FeaturePcdGet (PcdSmmSmramRequire) ?\r
+ PcdGet32 (PcdOvmfDecompressionScratchEnd) :\r
+ PcdGet32 (PcdOvmfDxeMemFvBase) + PcdGet32 (PcdOvmfDxeMemFvSize);\r
MemorySize = LowerMemorySize - MemoryBase;\r
if (MemorySize > PeiMemoryCap) {\r
MemoryBase = LowerMemorySize - PeiMemoryCap;\r
{\r
UINT64 LowerMemorySize;\r
UINT64 UpperMemorySize;\r
+ MTRR_SETTINGS MtrrSettings;\r
+ EFI_STATUS Status;\r
\r
DEBUG ((EFI_D_INFO, "%a called\n", __FUNCTION__));\r
\r
// Create memory HOBs\r
//\r
AddMemoryRangeHob (0, BASE_512KB + BASE_128KB);\r
- AddMemoryRangeHob (BASE_1MB, LowerMemorySize);\r
+\r
+ if (FeaturePcdGet (PcdSmmSmramRequire)) {\r
+ UINT32 TsegSize;\r
+\r
+ TsegSize = FixedPcdGet8 (PcdQ35TsegMbytes) * SIZE_1MB;\r
+ AddMemoryRangeHob (BASE_1MB, LowerMemorySize - TsegSize);\r
+ AddReservedMemoryBaseSizeHob (LowerMemorySize - TsegSize, TsegSize,\r
+ TRUE);\r
+ } else {\r
+ AddMemoryRangeHob (BASE_1MB, LowerMemorySize);\r
+ }\r
+\r
if (UpperMemorySize != 0) {\r
- AddUntestedMemoryBaseSizeHob (BASE_4GB, UpperMemorySize);\r
+ AddMemoryBaseSizeHob (BASE_4GB, UpperMemorySize);\r
}\r
}\r
\r
- MtrrSetMemoryAttribute (BASE_1MB, LowerMemorySize - BASE_1MB, CacheWriteBack);\r
+ //\r
+ // We'd like to keep the following ranges uncached:\r
+ // - [640 KB, 1 MB)\r
+ // - [LowerMemorySize, 4 GB)\r
+ //\r
+ // Everything else should be WB. Unfortunately, programming the inverse (ie.\r
+ // keeping the default UC, and configuring the complement set of the above as\r
+ // WB) is not reliable in general, because the end of the upper RAM can have\r
+ // practically any alignment, and we may not have enough variable MTRRs to\r
+ // cover it exactly.\r
+ //\r
+ if (IsMtrrSupported ()) {\r
+ MtrrGetAllMtrrs (&MtrrSettings);\r
+\r
+ //\r
+ // MTRRs disabled, fixed MTRRs disabled, default type is uncached\r
+ //\r
+ ASSERT ((MtrrSettings.MtrrDefType & BIT11) == 0);\r
+ ASSERT ((MtrrSettings.MtrrDefType & BIT10) == 0);\r
+ ASSERT ((MtrrSettings.MtrrDefType & 0xFF) == 0);\r
+\r
+ //\r
+ // flip default type to writeback\r
+ //\r
+ SetMem (&MtrrSettings.Fixed, sizeof MtrrSettings.Fixed, 0x06);\r
+ ZeroMem (&MtrrSettings.Variables, sizeof MtrrSettings.Variables);\r
+ MtrrSettings.MtrrDefType |= BIT11 | BIT10 | 6;\r
+ MtrrSetAllMtrrs (&MtrrSettings);\r
\r
- MtrrSetMemoryAttribute (0, BASE_512KB + BASE_128KB, CacheWriteBack);\r
+ //\r
+ // Set memory range from 640KB to 1MB to uncacheable\r
+ //\r
+ Status = MtrrSetMemoryAttribute (BASE_512KB + BASE_128KB,\r
+ BASE_1MB - (BASE_512KB + BASE_128KB), CacheUncacheable);\r
+ ASSERT_EFI_ERROR (Status);\r
\r
- if (UpperMemorySize != 0) {\r
- MtrrSetMemoryAttribute (BASE_4GB, UpperMemorySize, CacheWriteBack);\r
+ //\r
+ // Set memory range from the "top of lower RAM" (RAM below 4GB) to 4GB as\r
+ // uncacheable\r
+ //\r
+ Status = MtrrSetMemoryAttribute (LowerMemorySize,\r
+ SIZE_4GB - LowerMemorySize, CacheUncacheable);\r
+ ASSERT_EFI_ERROR (Status);\r
}\r
}\r
\r
}\r
\r
if (mBootMode != BOOT_ON_S3_RESUME) {\r
- //\r
- // Reserve the lock box storage area\r
- //\r
- // Since this memory range will be used on S3 resume, it must be\r
- // reserved as ACPI NVS.\r
- //\r
- // If S3 is unsupported, then various drivers might still write to the\r
- // LockBox area. We ought to prevent DXE from serving allocation requests\r
- // such that they would overlap the LockBox storage.\r
- //\r
- ZeroMem (\r
- (VOID*)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),\r
- (UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize)\r
- );\r
- BuildMemoryAllocationHob (\r
- (EFI_PHYSICAL_ADDRESS)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),\r
- (UINT64)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize),\r
- mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData\r
- );\r
+ if (!FeaturePcdGet (PcdSmmSmramRequire)) {\r
+ //\r
+ // Reserve the lock box storage area\r
+ //\r
+ // Since this memory range will be used on S3 resume, it must be\r
+ // reserved as ACPI NVS.\r
+ //\r
+ // If S3 is unsupported, then various drivers might still write to the\r
+ // LockBox area. We ought to prevent DXE from serving allocation requests\r
+ // such that they would overlap the LockBox storage.\r
+ //\r
+ ZeroMem (\r
+ (VOID*)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),\r
+ (UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize)\r
+ );\r
+ BuildMemoryAllocationHob (\r
+ (EFI_PHYSICAL_ADDRESS)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageBase),\r
+ (UINT64)(UINTN) PcdGet32 (PcdOvmfLockBoxStorageSize),\r
+ mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData\r
+ );\r
+ }\r
+\r
+ if (FeaturePcdGet (PcdSmmSmramRequire)) {\r
+ UINT32 TsegSize;\r
+\r
+ //\r
+ // Make sure the TSEG area that we reported as a reserved memory resource\r
+ // cannot be used for reserved memory allocations.\r
+ //\r
+ TsegSize = FixedPcdGet8 (PcdQ35TsegMbytes) * SIZE_1MB;\r
+ BuildMemoryAllocationHob (\r
+ GetSystemMemorySizeBelow4gb() - TsegSize,\r
+ TsegSize,\r
+ EfiReservedMemoryType\r
+ );\r
+ }\r
}\r
}\r
projects / mirror_edk2.git / blobdiff