[edk2-devel] [PATCH V5 07/10] OvmfPkg: Introduce lazy accept in PlatformInitLib and PlatformPei
Min Xu
min.m.xu at intel.com
Tue Nov 1 05:13:46 UTC 2022
From: Min M Xu <min.m.xu at intel.com>
RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3937
There are below major changes in PlatformInitLib/PlatformPei
1. ProcessHobList
The unaccepted memory is accepted if it is under 4G address.
Please be noted: in current stage, we only accept the memory under 4G.
We will re-visit here in the future when on-demand accept memory is
required.
2. TransferTdxHobList
Transfer the unaccepted memory hob to EFI_RESOURCE_SYSTEM_MEMORY hob
if it is accepted.
Cc: Erdem Aktas <erdemaktas at google.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: James Bottomley <jejb at linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Tom Lendacky <thomas.lendacky at amd.com>
Acked-by: Gerd Hoffmann <kraxel at redhat.com>
Signed-off-by: Min Xu <min.m.xu at intel.com>
---
OvmfPkg/Library/PlatformInitLib/IntelTdx.c | 88 ++++++++++++++++++---
OvmfPkg/Library/PlatformInitLib/MemDetect.c | 2 +
2 files changed, 81 insertions(+), 9 deletions(-)
diff --git a/OvmfPkg/Library/PlatformInitLib/IntelTdx.c b/OvmfPkg/Library/PlatformInitLib/IntelTdx.c
index 797f880df035..acd114e38e46 100644
--- a/OvmfPkg/Library/PlatformInitLib/IntelTdx.c
+++ b/OvmfPkg/Library/PlatformInitLib/IntelTdx.c
@@ -7,6 +7,7 @@
**/
+#include <Base.h>
#include <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
@@ -25,6 +26,7 @@
#include <ConfidentialComputingGuestAttr.h>
#define ALIGNED_2MB_MASK 0x1fffff
+#define MEGABYTE_SHIFT 20
/**
This function will be called to accept pages. Only BSP accepts pages.
@@ -375,11 +377,15 @@ ProcessHobList (
EFI_STATUS Status;
EFI_PEI_HOB_POINTERS Hob;
EFI_PHYSICAL_ADDRESS PhysicalEnd;
+ UINT64 ResourceLength;
+ UINT64 AccumulateAcceptedMemory;
Status = EFI_SUCCESS;
ASSERT (VmmHobList != NULL);
Hob.Raw = (UINT8 *)VmmHobList;
+ AccumulateAcceptedMemory = 0;
+
//
// Parse the HOB list until end of list or matching type is found.
//
@@ -393,7 +399,15 @@ ProcessHobList (
DEBUG ((DEBUG_INFO, "ResourceLength: 0x%llx\n", Hob.ResourceDescriptor->ResourceLength));
DEBUG ((DEBUG_INFO, "Owner: %g\n\n", &Hob.ResourceDescriptor->Owner));
- PhysicalEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
+ PhysicalEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
+ ResourceLength = Hob.ResourceDescriptor->ResourceLength;
+
+ if (Hob.ResourceDescriptor->PhysicalStart >= BASE_4GB) {
+ //
+ // In current stage, we only accept the memory under 4G
+ //
+ break;
+ }
Status = BspAcceptMemoryResourceRange (
Hob.ResourceDescriptor->PhysicalStart,
@@ -402,6 +416,8 @@ ProcessHobList (
if (EFI_ERROR (Status)) {
break;
}
+
+ AccumulateAcceptedMemory += ResourceLength;
}
}
@@ -460,6 +476,60 @@ ProcessTdxHobList (
return Status;
}
+/**
+ * Build ResourceDescriptorHob for the unaccepted memory region.
+ * This memory region may be splitted into 2 parts because of lazy accept.
+ *
+ * @param Hob Point to the EFI_HOB_RESOURCE_DESCRIPTOR
+ * @return VOID
+ */
+VOID
+BuildResourceDescriptorHobForUnacceptedMemory (
+ IN EFI_HOB_RESOURCE_DESCRIPTOR *Hob
+ )
+{
+ EFI_PHYSICAL_ADDRESS PhysicalStart;
+ EFI_PHYSICAL_ADDRESS PhysicalEnd;
+ UINT64 ResourceLength;
+ EFI_RESOURCE_TYPE ResourceType;
+ EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute;
+ UINT64 MaxAcceptedMemoryAddress;
+
+ ASSERT (Hob->ResourceType == BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED);
+
+ ResourceType = BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED;
+ ResourceAttribute = Hob->ResourceAttribute;
+ PhysicalStart = Hob->PhysicalStart;
+ ResourceLength = Hob->ResourceLength;
+ PhysicalEnd = PhysicalStart + ResourceLength;
+
+ //
+ // In the first stage of lazy-accept, all the memory under 4G will be accepted.
+ // The memory above 4G will not be accepted.
+ //
+ MaxAcceptedMemoryAddress = BASE_4GB;
+
+ if (PhysicalEnd <= MaxAcceptedMemoryAddress) {
+ //
+ // This memory region has been accepted.
+ //
+ ResourceType = EFI_RESOURCE_SYSTEM_MEMORY;
+ ResourceAttribute |= (EFI_RESOURCE_ATTRIBUTE_PRESENT | EFI_RESOURCE_ATTRIBUTE_INITIALIZED | EFI_RESOURCE_ATTRIBUTE_TESTED);
+ } else if (PhysicalStart >= MaxAcceptedMemoryAddress) {
+ //
+ // This memory region hasn't been accepted.
+ // So keep the ResourceType and ResourceAttribute unchange.
+ //
+ }
+
+ BuildResourceDescriptorHob (
+ ResourceType,
+ ResourceAttribute,
+ PhysicalStart,
+ ResourceLength
+ );
+}
+
/**
Transfer the incoming HobList for the TD to the final HobList for Dxe.
The Hobs transferred in this function are ResourceDescriptor hob and
@@ -489,16 +559,16 @@ TransferTdxHobList (
ResourceAttribute = Hob.ResourceDescriptor->ResourceAttribute;
if (ResourceType == BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED) {
- ResourceType = EFI_RESOURCE_SYSTEM_MEMORY;
- ResourceAttribute |= (EFI_RESOURCE_ATTRIBUTE_PRESENT | EFI_RESOURCE_ATTRIBUTE_INITIALIZED | EFI_RESOURCE_ATTRIBUTE_TESTED);
+ BuildResourceDescriptorHobForUnacceptedMemory (Hob.ResourceDescriptor);
+ } else {
+ BuildResourceDescriptorHob (
+ ResourceType,
+ ResourceAttribute,
+ Hob.ResourceDescriptor->PhysicalStart,
+ Hob.ResourceDescriptor->ResourceLength
+ );
}
- BuildResourceDescriptorHob (
- ResourceType,
- ResourceAttribute,
- Hob.ResourceDescriptor->PhysicalStart,
- Hob.ResourceDescriptor->ResourceLength
- );
break;
case EFI_HOB_TYPE_MEMORY_ALLOCATION:
BuildMemoryAllocationHob (
diff --git a/OvmfPkg/Library/PlatformInitLib/MemDetect.c b/OvmfPkg/Library/PlatformInitLib/MemDetect.c
index ae217d0242ed..b8feae4309de 100644
--- a/OvmfPkg/Library/PlatformInitLib/MemDetect.c
+++ b/OvmfPkg/Library/PlatformInitLib/MemDetect.c
@@ -42,6 +42,8 @@ Module Name:
#include <Library/PlatformInitLib.h>
+#define MEGABYTE_SHIFT 20
+
VOID
EFIAPI
PlatformQemuUc32BaseInitialization (
--
2.29.2.windows.2
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