`virsh capabilities` with a SapphireRapid cpu returns Broadwell-noTSX-IBRS on RHEL 9.2 EUS:

~~~

    <cpu>
      <arch>x86_64</arch>
      <model>Broadwell-noTSX-IBRS</model>
      <vendor>Intel</vendor>
      <microcode version='721421882'/>
      <signature family='6' model='143' stepping='8'/>
      <counter name='tsc' frequency='2000000000' scaling='yes'/>
      <topology sockets='1' dies='1' cores='28' threads='2'/>
      <maxphysaddr mode='emulate' bits='46'/>

~~~