KVM: PPC: Book3S HV Nested: Stop forwarding all HFUs to L1

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If the nested hypervisor has no access to a facility because it has
been disabled by the host, it should also not be able to see the
Hypervisor Facility Unavailable that arises from one of its guests
trying to access the facility.

This patch turns a HFU that happened in L2 into a Hypervisor Emulation
Assistance interrupt and forwards it to L1 for handling. The ones that
happened because L1 explicitly disabled the facility for L2 are still
let through, along with the corresponding Cause bits in the HFSCR.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
[np: move handling into kvmppc_handle_nested_exit]
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210811160134.904987-8-npiggin@gmail.com

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Fabiano Rosas 2021-08-12 02:00:41 +10:00 • committed by Michael Ellerman

parent 8b210a880b

commit 7c3ded5735

1 changed files with 29 additions and 2 deletions

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arch/powerpc/kvm/book3s_hv.c

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