KVM: PPC: Book3S HV P9: Optimise timebase reads

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Reduce the number of mfTB executed by passing the current timebase
around entry and exit code rather than read it multiple times.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-25-npiggin@gmail.com

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Nicholas Piggin 2021-11-23 19:52:02 +10:00 • committed by Michael Ellerman

parent 6547af3eba

commit cb2553a093

3 changed files with 65 additions and 58 deletions

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2

arch/powerpc/include/asm/kvm_book3s_64.h

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88

arch/powerpc/kvm/book3s_hv.c

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33

arch/powerpc/kvm/book3s_hv_p9_entry.c

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