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| author |   Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 19:51:58 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 21:08:58 +1100 |
| commit | 2251fbe76395e4d89c31099984714c5f1135f052 (patch) | |
| tree | c1971c38297e1a4f0672386bf59ff7b133d5bf1e /include/linux/debugobjects.h | |
| parent | KVM: PPC: Book3S HV P9: Reduce mtmsrd instructions required to save host SPRs (diff) | |
KVM: PPC: Book3S HV P9: Improve mtmsrd scheduling by delaying MSR[EE] disable
Moving the mtmsrd after the host SPRs are saved and before the guest
SPRs start to be loaded can prevent an SPR scoreboard stall (because
the mtmsrd is L=1 type which does not cause context synchronisation.
This is also now more convenient to combined with the mtmsrd L=0
instruction to enable facilities just below, but that is not done yet.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-21-npiggin@gmail.com
Diffstat (limited to 'include/linux/debugobjects.h')
0 files changed, 0 insertions, 0 deletions