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| -rw-r--r-- | docs/specs/ppc-spapr-xive.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/docs/specs/ppc-spapr-xive.rst b/docs/specs/ppc-spapr-xive.rst index 6159bc6eed..7199db730b 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``. |