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Commit: aeec8d84a6a27bac7d2d75661a78b1267fe4b8c7
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From 7b4320c2371e10cf717c7bc28f83485cf176e03d Mon Sep 17 00:00:00 2001
Message-Id: <7b4320c2371e10cf717c7bc28f83485cf176e03d@dist-git>
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Thu, 9 Aug 2018 15:14:20 +0200
Subject: [PATCH] conf: qemu: add support for Hyper-V reenlightenment
 notifications
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Qemu-3.0 supports so-called 'Reenlightenment' notifications and this (in
conjunction with 'hv-frequencies') can be used make Hyper-V on KVM pass
stable TSC page clocksource to L2 guests.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
(cherry picked from commit b5d770e155cbb7eec036b3d33ee0d81863ffc9a1)

https://bugzilla.redhat.com/show_bug.cgi?id=1589702

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
 docs/formatdomain.html.in               | 7 +++++++
 docs/schemas/domaincommon.rng           | 5 +++++
 src/conf/domain_conf.c                  | 6 +++++-
 src/conf/domain_conf.h                  | 1 +
 src/cpu/cpu_x86.c                       | 3 +++
 src/cpu/cpu_x86_data.h                  | 1 +
 src/qemu/qemu_command.c                 | 1 +
 src/qemu/qemu_parse_command.c           | 1 +
 src/qemu/qemu_process.c                 | 1 +
 tests/qemuxml2argvdata/hyperv-off.xml   | 1 +
 tests/qemuxml2argvdata/hyperv.args      | 3 ++-
 tests/qemuxml2argvdata/hyperv.xml       | 1 +
 tests/qemuxml2xmloutdata/hyperv-off.xml | 1 +
 tests/qemuxml2xmloutdata/hyperv.xml     | 1 +
 14 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 3b493a98ac..43a1067501 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1916,6 +1916,7 @@
     &lt;reset state='on'/&gt;
     &lt;vendor_id state='on' value='KVM Hv'/&gt;
     &lt;frequencies state='on'/&gt;
+    &lt;reenlightenment state='on'/&gt;
   &lt;/hyperv&gt;
   &lt;kvm&gt;
     &lt;hidden state='on'/&gt;
@@ -2044,6 +2045,12 @@
           <td> on, off</td>
           <td><span class="since">4.7.0 (QEMU 2.12)</span></td>
         </tr>
+        <tr>
+          <td>reenlightenment</td>
+          <td>Enable re-enlightenment notification on migration</td>
+          <td> on, off</td>
+          <td><span class="since">4.7.0 (QEMU 3.0)</span></td>
+        </tr>
       </table>
       </dd>
       <dt><code>pvspinlock</code></dt>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index f156a6b7c4..ceee7a8efe 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -5718,6 +5718,11 @@
             <ref name="featurestate"/>
           </element>
         </optional>
+        <optional>
+          <element name="reenlightenment">
+            <ref name="featurestate"/>
+          </element>
+        </optional>
       </interleave>
     </element>
   </define>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 150dd8acc8..18b4d03a61 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -170,7 +170,8 @@ VIR_ENUM_IMPL(virDomainHyperv, VIR_DOMAIN_HYPERV_LAST,
               "stimer",
               "reset",
               "vendor_id",
-              "frequencies")
+              "frequencies",
+              "reenlightenment")
 
 VIR_ENUM_IMPL(virDomainKVM, VIR_DOMAIN_KVM_LAST,
               "hidden")
@@ -20053,6 +20054,7 @@ virDomainDefParseXML(xmlDocPtr xml,
             case VIR_DOMAIN_HYPERV_STIMER:
             case VIR_DOMAIN_HYPERV_RESET:
             case VIR_DOMAIN_HYPERV_FREQUENCIES:
+            case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
                 break;
 
             case VIR_DOMAIN_HYPERV_SPINLOCKS:
@@ -22245,6 +22247,7 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src,
             case VIR_DOMAIN_HYPERV_STIMER:
             case VIR_DOMAIN_HYPERV_RESET:
             case VIR_DOMAIN_HYPERV_FREQUENCIES:
+            case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
                 if (src->hyperv_features[i] != dst->hyperv_features[i]) {
                     virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                                    _("State of HyperV enlightenment "
@@ -27894,6 +27897,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
                     case VIR_DOMAIN_HYPERV_STIMER:
                     case VIR_DOMAIN_HYPERV_RESET:
                     case VIR_DOMAIN_HYPERV_FREQUENCIES:
+                    case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
                         break;
 
                     case VIR_DOMAIN_HYPERV_SPINLOCKS:
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 97d38ff7b9..e450923019 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1792,6 +1792,7 @@ typedef enum {
     VIR_DOMAIN_HYPERV_RESET,
     VIR_DOMAIN_HYPERV_VENDOR_ID,
     VIR_DOMAIN_HYPERV_FREQUENCIES,
+    VIR_DOMAIN_HYPERV_REENLIGHTENMENT,
 
     VIR_DOMAIN_HYPERV_LAST
 } virDomainHyperv;
diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c
index a2fbfb577d..7a48b78eb9 100644
--- a/src/cpu/cpu_x86.c
+++ b/src/cpu/cpu_x86.c
@@ -111,6 +111,8 @@ KVM_FEATURE_DEF(VIR_CPU_x86_KVM_HV_RESET,
                 0x40000003, 0x00000080);
 KVM_FEATURE_DEF(VIR_CPU_x86_KVM_HV_FREQUENCIES,
                 0x40000003, 0x00000800);
+KVM_FEATURE_DEF(VIR_CPU_x86_KVM_HV_REENLIGHTENMENT,
+                0x40000003, 0x00002000);
 
 static virCPUx86Feature x86_kvm_features[] =
 {
@@ -132,6 +134,7 @@ static virCPUx86Feature x86_kvm_features[] =
     KVM_FEATURE(VIR_CPU_x86_KVM_HV_VPINDEX),
     KVM_FEATURE(VIR_CPU_x86_KVM_HV_RESET),
     KVM_FEATURE(VIR_CPU_x86_KVM_HV_FREQUENCIES),
+    KVM_FEATURE(VIR_CPU_x86_KVM_HV_REENLIGHTENMENT),
 };
 
 typedef struct _virCPUx86Model virCPUx86Model;
diff --git a/src/cpu/cpu_x86_data.h b/src/cpu/cpu_x86_data.h
index c01eb41be5..a810c64fc9 100644
--- a/src/cpu/cpu_x86_data.h
+++ b/src/cpu/cpu_x86_data.h
@@ -64,6 +64,7 @@ struct _virCPUx86CPUID {
 # define VIR_CPU_x86_KVM_HV_VPINDEX   "__kvm_hv_vpindex"
 # define VIR_CPU_x86_KVM_HV_RESET     "__kvm_hv_reset"
 # define VIR_CPU_x86_KVM_HV_FREQUENCIES "__kvm_hv_frequencies"
+# define VIR_CPU_x86_KVM_HV_REENLIGHTENMENT "__kvm_hv_reenlightenment"
 
 
 # define VIR_CPU_X86_DATA_INIT { 0 }
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 82c349819e..48f3b09ec9 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6920,6 +6920,7 @@ qemuBuildCpuCommandLine(virCommandPtr cmd,
             case VIR_DOMAIN_HYPERV_STIMER:
             case VIR_DOMAIN_HYPERV_RESET:
             case VIR_DOMAIN_HYPERV_FREQUENCIES:
+            case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
                 if (def->hyperv_features[i] == VIR_TRISTATE_SWITCH_ON)
                     virBufferAsprintf(&buf, ",hv_%s",
                                       virDomainHypervTypeToString(i));
diff --git a/src/qemu/qemu_parse_command.c b/src/qemu/qemu_parse_command.c
index ffea9a26bd..1e67a5a8c8 100644
--- a/src/qemu/qemu_parse_command.c
+++ b/src/qemu/qemu_parse_command.c
@@ -1537,6 +1537,7 @@ qemuParseCommandLineCPU(virDomainDefPtr dom,
             case VIR_DOMAIN_HYPERV_STIMER:
             case VIR_DOMAIN_HYPERV_RESET:
             case VIR_DOMAIN_HYPERV_FREQUENCIES:
+            case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
                 if (value) {
                     virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                                    _("HyperV feature '%s' should not "
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index dd92a6c179..990d4d3046 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -3924,6 +3924,7 @@ qemuProcessVerifyHypervFeatures(virDomainDefPtr def,
         case VIR_DOMAIN_HYPERV_STIMER:
         case VIR_DOMAIN_HYPERV_RESET:
         case VIR_DOMAIN_HYPERV_FREQUENCIES:
+        case VIR_DOMAIN_HYPERV_REENLIGHTENMENT:
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                            _("host doesn't support hyperv '%s' feature"),
                            virDomainHypervTypeToString(i));
diff --git a/tests/qemuxml2argvdata/hyperv-off.xml b/tests/qemuxml2argvdata/hyperv-off.xml
index d3a8455ac3..b2e3612df9 100644
--- a/tests/qemuxml2argvdata/hyperv-off.xml
+++ b/tests/qemuxml2argvdata/hyperv-off.xml
@@ -21,6 +21,7 @@
       <reset state='off'/>
       <vendor_id state='off'/>
       <frequencies state='off'/>
+      <reenlightenment state='off'/>
     </hyperv>
   </features>
   <clock offset='utc'/>
diff --git a/tests/qemuxml2argvdata/hyperv.args b/tests/qemuxml2argvdata/hyperv.args
index 53026bb2d5..4feafad8e2 100644
--- a/tests/qemuxml2argvdata/hyperv.args
+++ b/tests/qemuxml2argvdata/hyperv.args
@@ -9,7 +9,8 @@ QEMU_AUDIO_DRV=none \
 -S \
 -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_synic,hv_stimer,hv_reset,hv_vendor_id=KVM Hv,hv_frequencies,\
+hv_reenlightenment' \
 -m 214 \
 -smp 6,sockets=6,cores=1,threads=1 \
 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
diff --git a/tests/qemuxml2argvdata/hyperv.xml b/tests/qemuxml2argvdata/hyperv.xml
index 27372d1636..20fcdba59e 100644
--- a/tests/qemuxml2argvdata/hyperv.xml
+++ b/tests/qemuxml2argvdata/hyperv.xml
@@ -21,6 +21,7 @@
       <reset state='on'/>
       <vendor_id state='on' value='KVM Hv'/>
       <frequencies state='on'/>
+      <reenlightenment state='on'/>
     </hyperv>
   </features>
   <clock offset='utc'/>
diff --git a/tests/qemuxml2xmloutdata/hyperv-off.xml b/tests/qemuxml2xmloutdata/hyperv-off.xml
index 3ba0b827c3..4a41e0c37e 100644
--- a/tests/qemuxml2xmloutdata/hyperv-off.xml
+++ b/tests/qemuxml2xmloutdata/hyperv-off.xml
@@ -21,6 +21,7 @@
       <reset state='off'/>
       <vendor_id state='off'/>
       <frequencies state='off'/>
+      <reenlightenment state='off'/>
     </hyperv>
   </features>
   <clock offset='utc'/>
diff --git a/tests/qemuxml2xmloutdata/hyperv.xml b/tests/qemuxml2xmloutdata/hyperv.xml
index 1e47a946d6..183b45980b 100644
--- a/tests/qemuxml2xmloutdata/hyperv.xml
+++ b/tests/qemuxml2xmloutdata/hyperv.xml
@@ -21,6 +21,7 @@
       <reset state='on'/>
       <vendor_id state='on' value='KVM Hv'/>
       <frequencies state='on'/>
+      <reenlightenment state='on'/>
     </hyperv>
   </features>
   <clock offset='utc'/>
-- 
2.19.1
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