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From 267d4074f4c6a543643e1fe8cd726953273a5bc6 Mon Sep 17 00:00:00 2001
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Message-Id: <267d4074f4c6a543643e1fe8cd726953273a5bc6@dist-git>
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From: Jiri Denemark <jdenemar@redhat.com>
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Date: Wed, 10 Jan 2018 15:56:21 +0100
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Subject: [PATCH] qemu: Ignore fallback CPU attribute on reconnect
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When reconnecting to a running domain with host-model CPU started by old
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libvirt which did not store the actual CPU in the status XML, we need to
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ignore the fallback attribute to make sure we can translate the detected
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host CPU model to a model which is supported by the running QEMU.
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https://bugzilla.redhat.com/show_bug.cgi?id=1532980
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
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(cherry picked from commit 237f045d9a9d84a52e645b490d14ad0b66e5b8ed)
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/qemu/qemu_process.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
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index 701528c42c..c64088e4ca 100644
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--- a/src/qemu/qemu_process.c
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+++ b/src/qemu/qemu_process.c
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@@ -3884,6 +3884,11 @@ qemuProcessUpdateCPU(virQEMUDriverPtr driver,
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virDomainCapsCPUModelsPtr models = NULL;
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int ret = -1;
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+ /* The host CPU model comes from host caps rather than QEMU caps so
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+ * fallback must be allowed no matter what the user specified in the XML.
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+ */
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+ vm->def->cpu->fallback = VIR_CPU_FALLBACK_ALLOW;
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+
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if (qemuProcessFetchGuestCPU(driver, vm, asyncJob, &cpu, &disabled) < 0)
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goto cleanup;
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--
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2.15.1
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