| Message ID | 20200804131639.407049-1-clg@kaod.org |
|---|---|
| State | New |
| Headers | show |
| Series | docs: Update POWER9 XIVE support for nested guests | expand |
On Tue, Aug 04, 2020 at 03:16:39PM +0200, Cédric Le Goater wrote: > It is not yet supported. > > Signed-off-by: Cédric Le Goater <clg@kaod.org> Applied to ppc-for-5.2. > --- > docs/specs/ppc-spapr-xive.rst | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/docs/specs/ppc-spapr-xive.rst b/docs/specs/ppc-spapr-xive.rst > index 6159bc6eed62..7199db730b82 100644 > --- a/docs/specs/ppc-spapr-xive.rst > +++ b/docs/specs/ppc-spapr-xive.rst > @@ -61,6 +61,11 @@ depend on the XIVE KVM capability of the host. On older kernels > without XIVE KVM support, QEMU will use the emulated XIVE device as a > fallback and on newer kernels (>=5.2), the KVM XIVE device. > > +XIVE native exploitation mode is not supported for KVM nested guests, > +VMs running under a L1 hypervisor (KVM on pSeries). In that case, the > +hypervisor will not advertise the KVM capability and QEMU will use the > +emulated XIVE device, same as for older versions of KVM. > + > As a final refinement, the user can also switch the use of the KVM > device with the machine option ``kernel_irqchip``. >
diff --git a/docs/specs/ppc-spapr-xive.rst b/docs/specs/ppc-spapr-xive.rst index 6159bc6eed62..7199db730b82 100644 --- a/docs/specs/ppc-spapr-xive.rst +++ b/docs/specs/ppc-spapr-xive.rst @@ -61,6 +61,11 @@ depend on the XIVE KVM capability of the host. On older kernels without XIVE KVM support, QEMU will use the emulated XIVE device as a fallback and on newer kernels (>=5.2), the KVM XIVE device. +XIVE native exploitation mode is not supported for KVM nested guests, +VMs running under a L1 hypervisor (KVM on pSeries). In that case, the +hypervisor will not advertise the KVM capability and QEMU will use the +emulated XIVE device, same as for older versions of KVM. + As a final refinement, the user can also switch the use of the KVM device with the machine option ``kernel_irqchip``.
It is not yet supported. Signed-off-by: Cédric Le Goater <clg@kaod.org> --- docs/specs/ppc-spapr-xive.rst | 5 +++++ 1 file changed, 5 insertions(+)