69 lines
2.7 KiB
Diff
69 lines
2.7 KiB
Diff
From dd48ac51d1df4f718b4401b188d2824aebcc341c Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Wed, 26 Nov 2014 16:32:06 +0100
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Subject: [PATCH] OvmfPkg: disable multi-processor support for boot time
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We have no useful workload for APs, so let's not start them up, because
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they would spin indefinitely until ExitBootServices().
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Setting gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber to 1
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causes InitializeMpSupport() in "UefiCpuPkg/CpuDxe/CpuMp.c" to return
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early.
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Contributed-under: TianoCore Contribution Agreement 1.0
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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---
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OvmfPkg/OvmfPkgIa32.dsc | 4 ++++
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OvmfPkg/OvmfPkgIa32X64.dsc | 4 ++++
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OvmfPkg/OvmfPkgX64.dsc | 4 ++++
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3 files changed, 12 insertions(+)
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diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
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index 6598102..1730812 100644
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--- a/OvmfPkg/OvmfPkgIa32.dsc
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+++ b/OvmfPkg/OvmfPkgIa32.dsc
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@@ -329,6 +329,10 @@
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# IRQs 5, 9, 10, 11 are level-triggered
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gPcAtChipsetPkgTokenSpaceGuid.Pcd8259LegacyModeEdgeLevel|0x0E20
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+ # We have no useful workload for APs, so let's not start them up, because
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+ # they would spin indefinitely until ExitBootServices().
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+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber|1
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+
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################################################################################
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#
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# Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
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diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
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index 4de961f..370ae50 100644
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--- a/OvmfPkg/OvmfPkgIa32X64.dsc
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+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
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@@ -335,6 +335,10 @@
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# IRQs 5, 9, 10, 11 are level-triggered
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gPcAtChipsetPkgTokenSpaceGuid.Pcd8259LegacyModeEdgeLevel|0x0E20
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+ # We have no useful workload for APs, so let's not start them up, because
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+ # they would spin indefinitely until ExitBootServices().
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+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber|1
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+
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################################################################################
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#
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# Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
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diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
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index 6c38081..175d5f4 100644
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--- a/OvmfPkg/OvmfPkgX64.dsc
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+++ b/OvmfPkg/OvmfPkgX64.dsc
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@@ -334,6 +334,10 @@
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# IRQs 5, 9, 10, 11 are level-triggered
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gPcAtChipsetPkgTokenSpaceGuid.Pcd8259LegacyModeEdgeLevel|0x0E20
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+ # We have no useful workload for APs, so let's not start them up, because
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+ # they would spin indefinitely until ExitBootServices().
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+ gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber|1
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+
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################################################################################
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#
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# Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
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--
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1.8.3.1
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