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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 19:52:10 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 21:09:00 +1100 |
| commit | 3f9e2966d1b0dd81bcfaeb816335e0ddeedde3c1 (patch) | |
| tree | 1b88b6471db113e4881bff279b4551599962bac3 /scripts/stackusage | |
| parent | d5f480194577423731ee8413791a5486f26a95ab (diff) | |
| download | cachepc-linux-3f9e2966d1b0dd81bcfaeb816335e0ddeedde3c1.tar.gz cachepc-linux-3f9e2966d1b0dd81bcfaeb816335e0ddeedde3c1.zip | |
KVM: PPC: Book3S HV P9: Implement TM fastpath for guest entry/exit
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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