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From 360c3ee173809822e9363ec210a8197b66511a03 Mon Sep 17 00:00:00 2001
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Message-Id: <360c3ee173809822e9363ec210a8197b66511a03@dist-git>
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From: Jiri Denemark <jdenemar@redhat.com>
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Date: Fri, 21 Jun 2019 09:26:12 +0200
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Subject: [PATCH] qemu: Drop MSR features from host-model with old QEMU
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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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With QEMU versions which lack "unavailable-features" we use CPUID based
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detection of features which were enabled or disabled once QEMU starts.
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Thus using MSR features with host-model would result in all of them
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being marked as disabled in the active domain definition even though
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QEMU did not actually disable them.
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Let's make sure we add MSR features to host-model only when
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"unavailable-features" property is supported by QEMU.
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit 2674d00ed484091faf2b6e6b1efe58ee9a72b96b)
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https://bugzilla.redhat.com/show_bug.cgi?id=1697627
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Conflicts:
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tests/domaincapsschemadata/qemu_3.1.0.x86_64.xml
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tests/domaincapsschemadata/qemu_4.0.0.x86_64.xml
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- missing
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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Message-Id: <b7d9dd2f26053edb58fb8c3079334c2a494d07f9.1561068591.git.jdenemar@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/qemu/qemu_capabilities.c | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
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index 4be0ec305f..fbfe74d45b 100644
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--- a/src/qemu/qemu_capabilities.c
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+++ b/src/qemu/qemu_capabilities.c
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@@ -3114,6 +3114,21 @@ virQEMUCapsInitHostCPUModel(virQEMUCapsPtr qemuCaps,
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goto error;
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}
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+ if (ARCH_IS_X86(qemuCaps->arch) &&
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+ !virQEMUCapsGet(qemuCaps, QEMU_CAPS_CPU_UNAVAILABLE_FEATURES)) {
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+ if (cpu &&
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+ virCPUDefFilterFeatures(cpu, virCPUx86FeatureFilterDropMSR, NULL) < 0)
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+ goto error;
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+
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+ if (migCPU &&
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+ virCPUDefFilterFeatures(migCPU, virCPUx86FeatureFilterDropMSR, NULL) < 0)
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+ goto error;
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+
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+ if (fullCPU &&
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+ virCPUDefFilterFeatures(fullCPU, virCPUx86FeatureFilterDropMSR, NULL) < 0)
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+ goto error;
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+ }
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+
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virQEMUCapsSetHostModel(qemuCaps, type, cpu, migCPU, fullCPU);
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cleanup:
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--
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2.22.0
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