KVM: PPC: Book3S HV P9: Move remaining SPR and MSR access into low level entry

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Move register saving and loading from kvmhv_p9_guest_entry() into the HV
and nested entry handlers.

Accesses are scheduled to reduce mtSPR / mfSPR interleaving which
reduces SPR scoreboard stalls.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-32-npiggin@gmail.com

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Nicholas Piggin 2021-11-23 19:52:09 +10:00 • committed by Michael Ellerman

parent 08b3f08af5

commit d5f4801945

2 changed files with 109 additions and 66 deletions

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79

arch/powerpc/kvm/book3s_hv.c

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96

arch/powerpc/kvm/book3s_hv_p9_entry.c

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