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[Qemu-devel] [Patch v1 22/29] s390x/kvm: disable host model for existing
From: |
David Hildenbrand |
Subject: |
[Qemu-devel] [Patch v1 22/29] s390x/kvm: disable host model for existing compat machines |
Date: |
Tue, 2 Aug 2016 13:59:08 +0200 |
Compatibility machines that touch runtime-instrumentation should not
be used with the CPU model. Otherwise the host model will look different,
depending on the QEMU machine QEMU has been started with.
So let's simply disable the host model for existing compatibility machines
that all disable ri.
Acked-by: Cornelia Huck <address@hidden>
Signed-off-by: David Hildenbrand <address@hidden>
---
target-s390x/kvm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index edebc6d..4020328 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -2451,6 +2451,10 @@ static int configure_cpu_feat(const S390FeatBitmap
features)
bool kvm_s390_cpu_models_supported(void)
{
+ if (!ri_allowed()) {
+ /* compatibility machines interfere with the cpu model */
+ return false;
+ }
return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
KVM_S390_VM_CPU_MACHINE) &&
kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
--
2.6.6
- [Qemu-devel] [Patch v1 24/29] qmp: add QMP interface "query-cpu-model-expansion", (continued)
[Qemu-devel] [Patch v1 09/29] s390x/cpumodel: store the CPU model in the CPU instance, David Hildenbrand, 2016/08/02
[Qemu-devel] [Patch v1 11/29] s390x/cpumodel: let the CPU model handle feature checks, David Hildenbrand, 2016/08/02
[Qemu-devel] [Patch v1 20/29] s390x/kvm: allow runtime-instrumentation for "none" machine, David Hildenbrand, 2016/08/02
[Qemu-devel] [Patch v1 19/29] linux-headers: update against kvm/next, David Hildenbrand, 2016/08/02
[Qemu-devel] [Patch v1 21/29] s390x/kvm: implement CPU model support, David Hildenbrand, 2016/08/02
[Qemu-devel] [Patch v1 22/29] s390x/kvm: disable host model for existing compat machines,
David Hildenbrand <=
[Qemu-devel] [Patch v1 25/29] qmp: add QMP interface "query-cpu-model-comparison", David Hildenbrand, 2016/08/02
Re: [Qemu-devel] [Patch v1 25/29] qmp: add QMP interface "query-cpu-model-comparison", David Hildenbrand, 2016/08/04
[Qemu-devel] [Patch v1 29/29] s390x/cpumodel: implement QMP interface "query-cpu-model-baseline", David Hildenbrand, 2016/08/02
[Qemu-devel] [Patch v1 06/29] s390x/cpumodel: generate CPU feature group lists, David Hildenbrand, 2016/08/02