KVM: PPC: Book3S HV P9: Restrict DSISR canary workaround to processors that require it

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Use CPU_FTR_P9_RADIX_PREFETCH_BUG to apply the workaround, to test for
DD2.1 and below processors. This saves a mtSPR in guest entry.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-35-npiggin@gmail.com

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Nicholas Piggin 2021-11-23 19:52:12 +10:00 • committed by Michael Ellerman

parent 3e7b337902

commit d55b1eccc7

2 changed files with 6 additions and 3 deletions

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3

arch/powerpc/kvm/book3s_hv.c

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6

arch/powerpc/kvm/book3s_hv_p9_entry.c

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