62 lines
2.4 KiB
Diff
62 lines
2.4 KiB
Diff
From 29a1c56854c6bcd7b8f91952d3060fb4314a2968 Mon Sep 17 00:00:00 2001
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Message-ID: <29a1c56854c6bcd7b8f91952d3060fb4314a2968.1734433245.git.jdenemar@redhat.com>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Thu, 12 Dec 2024 10:02:43 +0100
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Subject: [PATCH] qemu: Enable I/O APIC if needed
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This is a follow up of my previous commits. If the number of
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vCPUs exceeds some arbitrary value (255) then QEMU requires IOMMU
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with EIM and intremap enabled. But in turn, intremap IOMMU
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requires split I/O APIC (per virDomainDefIOMMUValidate()). Since
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after my previous commits (e.g. v10.10.0-rc1~183) IOMMU is added
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automagically, the I/O APIC can be also enabled automagically.
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Relates to: https://issues.redhat.com/browse/RHEL-65844
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit 2d222ecf6e73614a400b830ac56e9aaa1bc55ecc)
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https://issues.redhat.com/browse/RHEL-65844
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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---
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src/qemu/qemu_postparse.c | 7 +++++++
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tests/qemuxmlconfdata/intel-iommu-eim-autoadd.xml | 3 ---
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2 files changed, 7 insertions(+), 3 deletions(-)
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diff --git a/src/qemu/qemu_postparse.c b/src/qemu/qemu_postparse.c
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index 03b5ef825a..f48f172c37 100644
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--- a/src/qemu/qemu_postparse.c
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+++ b/src/qemu/qemu_postparse.c
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@@ -1547,6 +1547,13 @@ qemuDomainDefEnableDefaultFeatures(virDomainDef *def,
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* capabilities, we still want to enable this */
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def->features[VIR_DOMAIN_FEATURE_GIC] = VIR_TRISTATE_SWITCH_ON;
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}
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+
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+ /* IOMMU with intremap requires split I/O APIC */
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+ if (def->iommu &&
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+ def->iommu->intremap == VIR_TRISTATE_SWITCH_ON &&
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+ def->features[VIR_DOMAIN_FEATURE_IOAPIC] == VIR_DOMAIN_IOAPIC_NONE) {
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+ def->features[VIR_DOMAIN_FEATURE_IOAPIC] = VIR_DOMAIN_IOAPIC_QEMU;
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+ }
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}
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diff --git a/tests/qemuxmlconfdata/intel-iommu-eim-autoadd.xml b/tests/qemuxmlconfdata/intel-iommu-eim-autoadd.xml
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index fa3aaf0d44..5abc40e566 100644
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--- a/tests/qemuxmlconfdata/intel-iommu-eim-autoadd.xml
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+++ b/tests/qemuxmlconfdata/intel-iommu-eim-autoadd.xml
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@@ -8,9 +8,6 @@
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<type arch='x86_64' machine='q35'>hvm</type>
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<boot dev='hd'/>
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</os>
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- <features>
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- <ioapic driver='qemu'/>
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- </features>
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<cpu mode='custom' match='exact' check='none'>
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<model fallback='forbid'>qemu64</model>
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</cpu>
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--
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2.47.1
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