1. 27 4月, 2020 1 次提交
    • D
      qemu: Add capability for CFPC pSeries feature · a0a2c8ab
      Daniel Henrique Barboza 提交于
      CFPC (Cache Flush on Privilege Change) is one of the capabilities
      added to QEMU to mitigate Spectre vulnerabilities in Power chips.
      It was implemented in QEMU 2.12 by commit 6898aed77f46.
      
      This capability is still used today due to differences in how
      the host setup (hardware and firmware/kernel) can handle this
      mitigation. Its default value also varies with the pseries machine
      version of the time. There's also certain OSes, like AIX, that
      might not support the default value of the pseries machine the
      guest uses.
      
      Exposing this in the Libvirt XML as a feature will allow users to tune
      CFPC values in a cleaner way, instead of hacking parameters in
      <qemu:commandline> elements.
      Signed-off-by: NDaniel Henrique Barboza <danielhb413@gmail.com>
      Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>
      a0a2c8ab
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