KVM: PPC: Book3S HV: Allow HV module to load without hypervisor mode

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With this, the KVM-HV module can be loaded in a guest running under
KVM-HV, and if the hypervisor supports nested virtualization, this
guest can now act as a nested hypervisor and run nested guests.

This also adds some checks to inform userspace that HPT guests are not
supported by nested hypervisors (by returning false for the
KVM_CAP_PPC_MMU_HASH_V3 capability), and to prevent userspace from
configuring a guest to use HPT mode.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Paul Mackerras 2018-10-08 16:31:16 +11:00 • committed by Michael Ellerman

parent 10b5022db7

commit de760db4d9

2 changed files with 14 additions and 5 deletions

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16

arch/powerpc/kvm/book3s_hv.c

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3

arch/powerpc/kvm/powerpc.c

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