qemu: always use hyphens in hyperv feature names

QEMU switched from using underscores in x86 CPU features to hyphens
in the 2.8.0 series with two commits

  commit fc7dfd205f3287893c436d932a167bffa30579c8 (HEAD, refs/bisect/bad)
  Author: Eduardo Habkost <ehabkost@redhat.com>
  Date:   Fri Sep 30 15:49:40 2016 -0300

    target-i386: Remove underscores from feat_names arrays

  commit 54b8dc7c19cd781e96f1e9b001ca6001d804eb19
  Author: Eduardo Habkost <ehabkost@redhat.com>
  Date:   Fri Sep 30 15:49:38 2016 -0300

    target-i386: Register aliases for feature names with underscores

Libvirt names use underscores so we conditionally tranlate the
names when talking to new QEMU. Since the min QEMU was raised to
version 2.11.0, all QEMU versions we talk to expect hypens, so
the translation can be done unconditionally.

Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index dba877a74088918e932dff03dea7ca80c2169db2..9e670162c03f89fa820f7b163637bb9c3a857a37 100644 (file)
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6813,11 +6813,6 @@ qemuBuildCpuCommandLine(virCommand *cmd,
     }
 
     if (def->features[VIR_DOMAIN_FEATURE_HYPERV] == VIR_TRISTATE_SWITCH_ON) {
-        const char *hvPrefix = "hv-";
-
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_CANONICAL_CPU_FEATURES))
-            hvPrefix = "hv_";
-
         for (i = 0; i < VIR_DOMAIN_HYPERV_LAST; i++) {
             switch ((virDomainHyperv) i) {
             case VIR_DOMAIN_HYPERV_RELAXED:
@@ -6833,8 +6828,7 @@ qemuBuildCpuCommandLine(virCommand *cmd,
             case VIR_DOMAIN_HYPERV_IPI:
             case VIR_DOMAIN_HYPERV_EVMCS:
                 if (def->hyperv_features[i] == VIR_TRISTATE_SWITCH_ON)
-                    virBufferAsprintf(&buf, ",%s%s",
-                                      hvPrefix,
+                    virBufferAsprintf(&buf, ",hv-%s",
                                       virDomainHypervTypeToString(i));
                 if ((i == VIR_DOMAIN_HYPERV_STIMER) &&
                     (def->hyperv_stimer_direct == VIR_TRISTATE_SWITCH_ON))

diff --git a/tests/qemuxml2argvdata/hyperv.x86_64-4.0.0.args b/tests/qemuxml2argvdata/hyperv.x86_64-4.0.0.args
index 100223b53a527255980aeea0acfdc4d2b5d017ef..32cc2fbff7e413c57b50492691a84cc8773daa54 100644 (file)
--- a/tests/qemuxml2argvdata/hyperv.x86_64-4.0.0.args
+++ b/tests/qemuxml2argvdata/hyperv.x86_64-4.0.0.args
@@ -12,7 +12,7 @@ QEMU_AUDIO_DRV=none \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
 -machine pc-i440fx-4.0,accel=tcg,usb=off,dump-guest-core=off \
--cpu 'qemu32,hv_relaxed,hv_vapic,hv-spinlocks=0x2fff,hv_vpindex,hv_runtime,hv_synic,hv_stimer,hv_reset,hv-vendor-id=KVM Hv,hv_frequencies,hv_reenlightenment,hv_tlbflush,hv_ipi,hv_evmcs' \
+-cpu 'qemu32,hv-relaxed,hv-vapic,hv-spinlocks=0x2fff,hv-vpindex,hv-runtime,hv-synic,hv-stimer,hv-reset,hv-vendor-id=KVM Hv,hv-frequencies,hv-reenlightenment,hv-tlbflush,hv-ipi,hv-evmcs' \
 -m 214 \
 -overcommit mem-lock=off \
 -smp 6,sockets=6,cores=1,threads=1 \