KVM: PPC: Book3S HV: CTRL SPR does not require read-modify-write

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Processors that support KVM HV do not require read-modify-write of
the CTRL SPR to set/clear their thread's runlatch. Just write 1 or 0
to it.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-18-npiggin@gmail.com

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Nicholas Piggin 2021-11-23 19:51:55 +10:00 • committed by Michael Ellerman

parent b1adcf57ce

commit a1a19e1154

2 changed files with 7 additions and 10 deletions

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2

arch/powerpc/kvm/book3s_hv.c

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15

arch/powerpc/kvm/book3s_hv_rmhandlers.S

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