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From 38b3d773dddd7f3cfe715b9cbabaa296c16c1290 Mon Sep 17 00:00:00 2001
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Message-Id: <38b3d773dddd7f3cfe715b9cbabaa296c16c1290@dist-git>
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From: Jiri Denemark <jdenemar@redhat.com>
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Date: Fri, 5 Jan 2018 17:43:03 +0100
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Subject: [PATCH] cpu_x86: Copy CPU signature from ancestor
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When specifying a new CPU model in cpu_map.xml as an extension to an
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existing model, we forgot to copy the signature (family + model) from
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the original CPU model.
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We don't use this way of specifying CPU models, but it's still supported
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and it becomes useful when someone wants to quickly hack up a CPU model
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for testing or when creating additional variants of existing models to
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help with fixing some spectral issues.
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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 b427cf4831d0ea7aac9dd1a3aa7682478356a483)
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https://bugzilla.redhat.com/show_bug.cgi?id=1533125
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The new -IBRS and -IBPB CPU models were defined via inheritance from
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their original models in RHEL. Thus when the host CPU matches the
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signature of the original model from cpu_map.xml, libvirt will detect
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the host CPU as the original model + the new feature rather than
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reporting it as the -IBRS/-IBPB variant.
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/cpu/cpu_x86.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c
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index ad35532fc1..001109f701 100644
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--- a/src/cpu/cpu_x86.c
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+++ b/src/cpu/cpu_x86.c
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@@ -1227,6 +1227,7 @@ x86ModelParse(xmlXPathContextPtr ctxt,
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VIR_FREE(name);
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model->vendor = ancestor->vendor;
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+ model->signature = ancestor->signature;
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if (x86DataCopy(&model->data, &ancestor->data) < 0)
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goto error;
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}
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--
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2.15.1
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