[libvirt] [PATCH v4 2/4] conf: add support for Direct Mode for Hyper-V Synthetic timers

Support 'Direct Mode' for Hyper-V Synthetic Timers in domain config. Make it 'stimer' enlightenment option as it is not a separate thing. Reviewed-by: Ján Tomko <jtomko(a)redhat.com&gt; Signed-off-by: Vitaly Kuznetsov <vkuznets(a)redhat.com&gt; --- docs/formatdomain.html.in | 10 +++--- docs/schemas/domaincommon.rng | 16 ++++++++- src/conf/domain_conf.c | 62 ++++++++++++++++++++++++++++++++++- src/conf/domain_conf.h | 1 + src/cpu/cpu_x86.c | 3 ++ src/cpu/cpu_x86_data.h | 2 ++ 6 files changed, 88 insertions(+), 6 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index f5c882141a..de577e5755 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -2033,7 +2033,9 @@ &lt;vpindex state='on'/&gt; &lt;runtime state='on'/&gt; &lt;synic state='on'/&gt; - &lt;stimer state='on'/&gt; + &lt;stimer state='on'&gt; + &lt;direct state='on'/&gt; + &lt;/stimer&gt; &lt;reset state='on'/&gt; &lt;vendor_id state='on' value='KVM Hv'/&gt; &lt;frequencies state='on'/&gt; @@ -2148,9 +2150,9 @@ </tr> <tr> <td>stimer</td> - <td>Enable SynIC timers</td> - <td>on, off</td> - <td><span class="since">1.3.3 (QEMU 2.6)</span></td> + <td>Enable SynIC timers, optionally with Direct Mode support</td> + <td>on, off; direct - on,off</td> + <td><span class="since">1.3.3 (QEMU 2.6), direct mode 5.7.0 (QEMU 4.1)</span></td> </tr> <tr> <td>reset</td> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index a0771da45b..6707dcc634 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -5907,7 +5907,7 @@ </optional> <optional> <element name="stimer"> - <ref name="featurestate"/> + <ref name="stimer"/> </element> </optional> <optional> @@ -5956,6 +5956,20 @@ </element> </define> + <!-- Hyper-V stimer features --> + <define name="stimer"> + <interleave> + <optional> + <ref name="featurestate"/> + </optional> + <optional> + <element name="direct"> + <ref name="featurestate"/> + </element> + </optional> + </interleave> + </define> + <!-- Optional KVM features --> <define name="kvm"> <element name="kvm"> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 0456369d55..f56e850ade 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -20388,6 +20388,39 @@ virDomainDefParseXML(xmlDocPtr xml, ctxt->node = node; } + if (def->features[VIR_DOMAIN_HYPERV_STIMER] == VIR_TRISTATE_SWITCH_ON) { + int value; + if ((n = virXPathNodeSet("./features/hyperv/stimer/*", ctxt, &nodes)) < 0) + goto error; + + for (i = 0; i < n; i++) { + if (STRNEQ((const char *)nodes[i]->name, "direct")) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("unsupported Hyper-V stimer feature: %s"), + nodes[i]->name); + goto error; + } + + if (!(tmp = virXMLPropString(nodes[i], "state"))) { + virReportError(VIR_ERR_XML_ERROR, + _("missing 'state' attribute for " + "Hyper-V stimer '%s' feature"), "direct"); + goto error; + } + + if ((value = virTristateSwitchTypeFromString(tmp)) < 0) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("invalid value of state argument " + "for Hyper-V stimer '%s' feature"), "direct"); + goto error; + } + + VIR_FREE(tmp); + def->hyperv_stimer_direct = value; + } + VIR_FREE(nodes); + } + if (def->features[VIR_DOMAIN_FEATURE_KVM] == VIR_TRISTATE_SWITCH_ON) { int feature; int value; @@ -22612,6 +22645,17 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src, } } + if (src->hyperv_features[VIR_DOMAIN_HYPERV_STIMER] == VIR_TRISTATE_SWITCH_ON) { + if (src->hyperv_stimer_direct != dst->hyperv_stimer_direct) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("State of HyperV stimer direct feature differs: " + "source: '%s', destination: '%s'"), + virTristateSwitchTypeToString(src->hyperv_stimer_direct), + virTristateSwitchTypeToString(dst->hyperv_stimer_direct)); + return false; + } + } + /* kvm */ if (src->features[VIR_DOMAIN_FEATURE_KVM] == VIR_TRISTATE_SWITCH_ON) { for (i = 0; i < VIR_DOMAIN_KVM_LAST; i++) { @@ -28071,7 +28115,6 @@ virDomainDefFormatFeatures(virBufferPtr buf, case VIR_DOMAIN_HYPERV_VPINDEX: case VIR_DOMAIN_HYPERV_RUNTIME: case VIR_DOMAIN_HYPERV_SYNIC: - case VIR_DOMAIN_HYPERV_STIMER: case VIR_DOMAIN_HYPERV_RESET: case VIR_DOMAIN_HYPERV_FREQUENCIES: case VIR_DOMAIN_HYPERV_REENLIGHTENMENT: @@ -28090,6 +28133,23 @@ virDomainDefFormatFeatures(virBufferPtr buf, def->hyperv_spinlocks); break; + case VIR_DOMAIN_HYPERV_STIMER: + if (def->hyperv_features[j] != VIR_TRISTATE_SWITCH_ON) { + virBufferAddLit(&childBuf, "/>\n"); + break; + } + if (def->hyperv_stimer_direct == VIR_TRISTATE_SWITCH_ON) { + virBufferAddLit(&childBuf, ">\n"); + virBufferAdjustIndent(&childBuf, 2); + virBufferAddLit(&childBuf, "<direct state='on'/>\n"); + virBufferAdjustIndent(&childBuf, -2); + virBufferAddLit(&childBuf, "</stimer>\n"); + } else { + virBufferAddLit(&childBuf, "/>\n"); + } + + break; + case VIR_DOMAIN_HYPERV_VENDOR_ID: if (def->hyperv_features[j] != VIR_TRISTATE_SWITCH_ON) { virBufferAddLit(&childBuf, "/>\n"); diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 57ca2a8ad1..8434f1fd0b 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2400,6 +2400,7 @@ struct _virDomainDef { int kvm_features[VIR_DOMAIN_KVM_LAST]; int msrs_features[VIR_DOMAIN_MSRS_LAST]; unsigned int hyperv_spinlocks; + int hyperv_stimer_direct; virGICVersion gic_version; virDomainHPTResizing hpt_resizing; unsigned long long hpt_maxpagesize; /* Stored in KiB */ diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c index d2d9537c32..32b9836dd5 100644 --- a/src/cpu/cpu_x86.c +++ b/src/cpu/cpu_x86.c @@ -100,6 +100,8 @@ KVM_FEATURE_DEF(VIR_CPU_x86_HV_IPI, 0x40000004, 0x00000400, 0x0); KVM_FEATURE_DEF(VIR_CPU_x86_HV_EVMCS, 0x40000004, 0x00004000, 0x0); +KVM_FEATURE_DEF(VIR_CPU_x86_HV_STIMER_DIRECT, + 0x40000003, 0x0, 0x00080000); static virCPUx86Feature x86_kvm_features[] = { @@ -116,6 +118,7 @@ static virCPUx86Feature x86_kvm_features[] = KVM_FEATURE(VIR_CPU_x86_HV_TLBFLUSH), KVM_FEATURE(VIR_CPU_x86_HV_IPI), KVM_FEATURE(VIR_CPU_x86_HV_EVMCS), + KVM_FEATURE(VIR_CPU_x86_HV_STIMER_DIRECT), }; typedef struct _virCPUx86Model virCPUx86Model; diff --git a/src/cpu/cpu_x86_data.h b/src/cpu/cpu_x86_data.h index cc0c93dff0..cebf3b6669 100644 --- a/src/cpu/cpu_x86_data.h +++ b/src/cpu/cpu_x86_data.h @@ -64,6 +64,8 @@ struct _virCPUx86MSR { #define VIR_CPU_x86_HV_IPI "hv-ipi" #define VIR_CPU_x86_HV_EVMCS "hv-evmcs" +/* Hyper-V Synthetic Timer option */ +#define VIR_CPU_x86_HV_STIMER_DIRECT "hv-stimer-direct" #define VIR_CPU_X86_DATA_INIT { 0 } -- 2.20.1