8f8a38d6e0
The live migration of Hygon CSV1/2/3 guest depends on the KVM
hypercall KVM_HC_MAP_GPA_RANGE, add code to sync page enc/dec
status to KVM.
The MMIO routine of VC handler will get memory encrypt status to
validate MMIO address. MemEncryptSevGetEncryptionMask() will enable
interrupt while interrupt must be disabled during VC. During DXE
stage, VC routine as below:
CcExitHandleVc
-> MemEncryptSevGetAddressRangeState
-> MemEncryptSevGetEncryptionMask->PcdGet64(PcdPteMemoryEncryptionAddressOrMask)
Signed-off-by: hanliyang <hanliyang@hygon.cn>
48 lines
1.6 KiB
Diff
48 lines
1.6 KiB
Diff
From 1058be0934a043804f2ae0b8ea1aa42454dc0eb8 Mon Sep 17 00:00:00 2001
|
|
From: Ashish Kalra <ashish.kalra@amd.com>
|
|
Date: Tue, 5 Apr 2022 16:27:26 +0000
|
|
Subject: [PATCH 4/9] OvmfPkg/VmgExitLib: Encryption state change hypercall
|
|
support in VC handler
|
|
|
|
cherry-picked from https://patchew.org/EDK2/cover.1629380011.git.ashish.kalra@amd.com .
|
|
|
|
Make the #VC handler aware of the page encryption state
|
|
change hypercall by adding support to check KVM_HC_MAP_GPA_RANGE
|
|
hypercall and add the additional register values used by
|
|
hypercall in the GHCB.
|
|
|
|
Cc: Jordan Justen <jordan.l.justen@intel.com>
|
|
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
|
|
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
|
|
---
|
|
OvmfPkg/Library/CcExitLib/CcExitVcHandler.c | 13 +++++++++++++
|
|
1 file changed, 13 insertions(+)
|
|
|
|
diff --git a/OvmfPkg/Library/CcExitLib/CcExitVcHandler.c b/OvmfPkg/Library/CcExitLib/CcExitVcHandler.c
|
|
index 0fc30f7b..5c9a9085 100644
|
|
--- a/OvmfPkg/Library/CcExitLib/CcExitVcHandler.c
|
|
+++ b/OvmfPkg/Library/CcExitLib/CcExitVcHandler.c
|
|
@@ -677,6 +677,19 @@ VmmCallExit (
|
|
Ghcb->SaveArea.Cpl = (UINT8)(Regs->Cs & 0x3);
|
|
CcExitVmgSetOffsetValid (Ghcb, GhcbCpl);
|
|
|
|
+ if (Regs->Rax == KVM_HC_MAP_GPA_RANGE) {
|
|
+ //
|
|
+ // KVM_HC_MAP_GPA_RANGE hypercall requires these
|
|
+ // extra registers.
|
|
+ //
|
|
+ Ghcb->SaveArea.Rbx = Regs->Rbx;
|
|
+ CcExitVmgSetOffsetValid (Ghcb, GhcbRbx);
|
|
+ Ghcb->SaveArea.Rcx = Regs->Rcx;
|
|
+ CcExitVmgSetOffsetValid (Ghcb, GhcbRcx);
|
|
+ Ghcb->SaveArea.Rdx = Regs->Rdx;
|
|
+ CcExitVmgSetOffsetValid (Ghcb, GhcbRdx);
|
|
+ }
|
|
+
|
|
Status = CcExitVmgExit (Ghcb, SVM_EXIT_VMMCALL, 0, 0);
|
|
if (Status != 0) {
|
|
return Status;
|
|
--
|
|
2.25.1
|
|
|