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qemu: add support for Hyper-V Enlightened VMCS

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QEMU 3.1 supports Hyper-V Enlightened VMCS feature which significantly
speeds up nested Hyper-V on KVM environments.

Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2018-11-14 23:46:07 +01:00 committed by Andrea Bolognani
parent c3d0d7cc8a
commit 362b4ee616
8 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/qemu/qemu_command.c
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@ -6883,6 +6883,7 @@ qemuBuildCpuCommandLine(virCommandPtr cmd,
case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
case VIR_DOMAIN_HYPERV_TLBFLUSH:
case VIR_DOMAIN_HYPERV_IPI:
case VIR_DOMAIN_HYPERV_EVMCS:
if (def->hyperv_features[i] == VIR_TRISTATE_SWITCH_ON)
virBufferAsprintf(&buf, ",hv_%s",
virDomainHypervTypeToString(i));
@ -6900,7 +6901,6 @@ qemuBuildCpuCommandLine(virCommandPtr cmd,
def->hyperv_vendor_id);
break;
case VIR_DOMAIN_HYPERV_EVMCS:
/* coverity[dead_error_begin] */
case VIR_DOMAIN_HYPERV_LAST:
break;

2
src/qemu/qemu_parse_command.c
View File

@ -1540,6 +1540,7 @@ qemuParseCommandLineCPU(virDomainDefPtr dom,
case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
case VIR_DOMAIN_HYPERV_TLBFLUSH:
case VIR_DOMAIN_HYPERV_IPI:
case VIR_DOMAIN_HYPERV_EVMCS:
if (value) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("HyperV feature '%s' should not "
@ -1580,7 +1581,6 @@ qemuParseCommandLineCPU(virDomainDefPtr dom,
break;
case VIR_DOMAIN_HYPERV_EVMCS:
case VIR_DOMAIN_HYPERV_LAST:
break;
}

2
src/qemu/qemu_process.c
View File

@ -3965,12 +3965,12 @@ qemuProcessVerifyHypervFeatures(virDomainDefPtr def,
case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
case VIR_DOMAIN_HYPERV_TLBFLUSH:
case VIR_DOMAIN_HYPERV_IPI:
case VIR_DOMAIN_HYPERV_EVMCS:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("host doesn't support hyperv '%s' feature"),
virDomainHypervTypeToString(i));
return -1;
case VIR_DOMAIN_HYPERV_EVMCS:
/* coverity[dead_error_begin] */
case VIR_DOMAIN_HYPERV_VENDOR_ID:
case VIR_DOMAIN_HYPERV_LAST:

1
tests/qemuxml2argvdata/hyperv-off.xml
View File

@ -24,6 +24,7 @@
<reenlightenment state='off'/>
<tlbflush state='off'/>
<ipi state='off'/>
<evmcs state='off'/>
</hyperv>
</features>
<clock offset='utc'/>

2
tests/qemuxml2argvdata/hyperv.args
View File

@ -10,7 +10,7 @@ QEMU_AUDIO_DRV=none \
-machine pc,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_reenlightenment,hv_tlbflush,hv_ipi,hv_evmcs' \
-m 214 \
-smp 6,sockets=6,cores=1,threads=1 \
-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \

1
tests/qemuxml2argvdata/hyperv.xml
View File

@ -24,6 +24,7 @@
<reenlightenment state='on'/>
<tlbflush state='on'/>
<ipi state='on'/>
<evmcs state='on'/>
</hyperv>
</features>
<clock offset='utc'/>

1
tests/qemuxml2xmloutdata/hyperv-off.xml
View File

@ -24,6 +24,7 @@
<reenlightenment state='off'/>
<tlbflush state='off'/>
<ipi state='off'/>
<evmcs state='off'/>
</hyperv>
</features>
<clock offset='utc'/>

1
tests/qemuxml2xmloutdata/hyperv.xml
View File

@ -24,6 +24,7 @@
<reenlightenment state='on'/>
<tlbflush state='on'/>
<ipi state='on'/>
<evmcs state='on'/>
</hyperv>
</features>
<clock offset='utc'/>