KVM: PPC: Book3S HV P9: Implement TM fastpath for guest entry/exit

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If TM is not active, only TM register state needs to be saved and
restored, avoiding several mfmsr/mtmsrd instructions and improving
performance.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-33-npiggin@gmail.com

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

parent d5f4801945

commit 3f9e2966d1

1 changed files with 23 additions and 4 deletions

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arch/powerpc/kvm/book3s_hv_p9_entry.c

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