36 lines
1.3 KiB
Diff
36 lines
1.3 KiB
Diff
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From fbdd6e4664e41eb299a797f1ab615d81b1bd958b Mon Sep 17 00:00:00 2001
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From: hanliyang <hanliyang@hygon.cn>
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Date: Mon, 17 Jan 2022 01:19:21 -0500
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Subject: [PATCH 7/9] OvmfPkg/BaseMemcryptSevLib: Correct the calculation of
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page range that notified to hypervisor
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Correct the calculation of page range that notified to hypervisor.
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Signed-off-by: hanliyang <hanliyang@hygon.cn>
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---
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.../Library/BaseMemEncryptSevLib/X64/PeiDxeVirtualMemory.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiDxeVirtualMemory.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiDxeVirtualMemory.c
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index 42e3b03f..69ada871 100644
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--- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiDxeVirtualMemory.c
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+++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiDxeVirtualMemory.c
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@@ -999,9 +999,13 @@ SetMemoryEncDec (
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// Notify Hypervisor on C-bit status
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//
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if (CBitChanged) {
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+ UINTN StartPfn = OrigPhysicalAddress >> EFI_PAGE_SHIFT;
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+ UINTN EndPfn = (OrigPhysicalAddress + OrigLength +
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+ ((1 << EFI_PAGE_SHIFT) - 1)) >> EFI_PAGE_SHIFT;
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+
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Status = SetMemoryEncDecHypercall3 (
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OrigPhysicalAddress,
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- EFI_SIZE_TO_PAGES (OrigLength),
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+ (EndPfn - StartPfn),
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(Mode == SetCBit) ? TRUE : FALSE
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);
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}
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--
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2.25.1
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