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Intel suggest that some workloads will benefit from this. > > > > +### svm_avic (x86) > > +> `= true | false | nodoorbell` > > + > > +This option configures Advanced Virtual Interrupt Controller (AVIC), which > > +is an extension of AMD Secure Virtual Machine (SVM) to virtualize local APIC > > +for guest VM. > > + > > +This parameter is experimental and for expert configuration only. > > + > > +Xen has mitigatations for the following AVIC hardware flaws: > > Nit: mitigations > > > + * AMD Erratum 1235. A hardware flaw affecting certain AMD Family 17h and > > + Hygon Family 18h processors where the CPU hardware reads a stale > > + `IsRunning=1` bit during Interrupt Control Register (ICR) write emulation. > > + > > +Limitations: > > + > > + * AVIC in x2APIC mode is not supported. > > + > > + * AVIC in nested virtualization setup is not supported. > > + > > ### sync_console > > > `= ` > > This wants to be part of the patch where the option is introduced. New options I introduced 'svm_avic=nodoorbell' later in the series, after svm_avic= appears for the first time. So my thinking was to document all new options in one patch... > also want to use dashes in favor of underscores. Plus the default setting of > this option wants making explicit. Will switch to dashes. > > Jan >