KVM: PPC: Book3S HV nestedv2: Register the VPA with the L0

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In the nestedv2 case, the L1 may register the L2's VPA with the L0. This
allows the L0 to manage the L2's dispatch count, as well as enable
possible performance optimisations by seeing if certain resources are
not being used by the L2 (such as the PMCs).

Use the H_GUEST_SET_STATE call to inform the L0 of the L2's VPA
address. This can not be done in the H_GUEST_VCPU_RUN input buffer.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231201132618.555031-11-vaibhav@linux.ibm.com

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Jordan Niethe 2023-12-01 18:56:15 +05:30 • committed by Michael Ellerman

parent 4bc8ff6f17

commit db1dcfae1d

3 changed files with 59 additions and 9 deletions

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1

arch/powerpc/include/asm/kvm_book3s_64.h

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38

arch/powerpc/kvm/book3s_hv.c

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29

arch/powerpc/kvm/book3s_hv_nestedv2.c

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