File ovmf-Revert-OvmfPkg-OvmfXen-Set-PcdFSBClock.patch of Package ovmf

From f059118317b6d3a1dfdeec45494d279842c855e4 Mon Sep 17 00:00:00 2001
From: Richard Lyu <richard.lyu@suse.com>
Date: Thu, 29 May 2025 13:22:47 +0800
Subject: [PATCH] Revert "OvmfPkg/OvmfXen: Set PcdFSBClock"

This reverts commit 71cdb91f313380152d7bf38cfeebe76f5b2d39ac.
---
 OvmfPkg/OvmfXen.dsc                       | 4 +++-
 OvmfPkg/XenPlatformPei/Xen.c              | 4 ----
 OvmfPkg/XenPlatformPei/XenPlatformPei.inf | 1 -
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
index 088c63f5c2..6f636a79a2 100644
--- a/OvmfPkg/OvmfXen.dsc
+++ b/OvmfPkg/OvmfXen.dsc
@@ -451,6 +451,9 @@
   # Point to the MdeModulePkg/Application/BootManagerMenuApp/BootManagerMenuApp.inf
   gEfiMdeModulePkgTokenSpaceGuid.PcdBootManagerMenuFile|{ 0xdc, 0x5b, 0xc2, 0xee, 0xf2, 0x67, 0x95, 0x4d, 0xb1, 0xd5, 0xf8, 0x1b, 0x20, 0x39, 0xd1, 0x1d }
 
+  ## Xen vlapic's frequence is 100 MHz
+  gEfiMdePkgTokenSpaceGuid.PcdFSBClock|100000000
+
   # We populate DXE IPL tables with 1G pages preferably on Xen
   gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable|TRUE
 
@@ -484,7 +487,6 @@
   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base|0x0
   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size|0x800000000
 
-  gEfiMdePkgTokenSpaceGuid.PcdFSBClock|100000000
   gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut|0
 
   # Set video resolution for text setup.
diff --git a/OvmfPkg/XenPlatformPei/Xen.c b/OvmfPkg/XenPlatformPei/Xen.c
index a54fd55c70..68ae4801ae 100644
--- a/OvmfPkg/XenPlatformPei/Xen.c
+++ b/OvmfPkg/XenPlatformPei/Xen.c
@@ -613,9 +613,5 @@ CalibrateLapicTimer (
   Freq = DivU64x64Remainder (Dividend, TscTick2 - TscTick, NULL);
   DEBUG ((DEBUG_INFO, "APIC Freq % 8lu Hz\n", Freq));
 
-  ASSERT (Freq <= MAX_UINT32);
-  Status = PcdSet32S (PcdFSBClock, (UINT32)Freq);
-  ASSERT_EFI_ERROR (Status);
-
   UnmapXenPage (SharedInfo);
 }
diff --git a/OvmfPkg/XenPlatformPei/XenPlatformPei.inf b/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
index 20c27ff34b..790f4af551 100644
--- a/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
+++ b/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
@@ -86,7 +86,6 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode
   gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask
-  gEfiMdePkgTokenSpaceGuid.PcdFSBClock
   gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy
   gUefiCpuPkgTokenSpaceGuid.PcdCpuLocalApicBaseAddress
 
-- 
2.43.0