[Xen-devel] [PATCH v5 29/35] OvmfPkg/OvmfXen: Override PcdFSBClock to Xen vLAPIC timer frequency

From: Anthony PERARD <anthony.perard@citrix.com>
To: <devel@edk2.groups.io>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Jordan Justen <jordan.l.justen@intel.com>,
	Julien Grall <julien.grall@arm.com>,
	Anthony PERARD <anthony.perard@citrix.com>,
	xen-devel@lists.xenproject.org, Laszlo Ersek <lersek@redhat.com>
Subject: [Xen-devel] [PATCH v5 29/35] OvmfPkg/OvmfXen: Override PcdFSBClock to Xen vLAPIC timer frequency
Date: Tue, 13 Aug 2019 12:31:13 +0100
Message-ID: <20190813113119.14804-30-anthony.perard@citrix.com> (raw)
In-Reply-To: <20190813113119.14804-1-anthony.perard@citrix.com>

PcdFSBClock is used by SecPeiDxeTimerLibCpu, the TimerLib
implementation. It will also be used by XenTimerDxe. Override
PcdFSBClock to match Xen vLAPIC timer frequency.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
---

Notes:
    v3:
    - expand commit message body to be standalone

 OvmfPkg/OvmfXen.dsc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
index 22970eda5d..477d8c76a1 100644
--- a/OvmfPkg/OvmfXen.dsc
+++ b/OvmfPkg/OvmfXen.dsc
@@ -439,6 +439,9 @@ [PcdsFixedAtBuild]
   # Point to the MdeModulePkg/Application/UiApp/UiApp.inf
   gEfiMdeModulePkgTokenSpaceGuid.PcdBootManagerMenuFile|{ 0x21, 0xaa, 0x2c, 0x46, 0x14, 0x76, 0x03, 0x45, 0x83, 0x6e, 0x8a, 0xb6, 0xf4, 0x66, 0x23, 0x31 }
 
+  ## Xen vlapic's frequence is 100 MHz
+  gEfiMdePkgTokenSpaceGuid.PcdFSBClock|100000000
+
 ################################################################################
 #
 # Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
-- 
Anthony PERARD

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