diff options
| author |   Nicholas Piggin <npiggin@gmail.com> | 2017-08-25 14:30:33 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-08-29 14:48:59 +1000 |
| commit | 94a04bc25a2c6296bd0c5e82c10e8231c2b11f77 (patch) | |
| tree | e299908064b8b13718b6f5915d9469d103125b0d /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | powerpc/mm: Rename find_linux_pte_or_hugepte() (diff) | |
| download | wireguard-linux-94a04bc25a2c6296bd0c5e82c10e8231c2b11f77.tar.xz wireguard-linux-94a04bc25a2c6296bd0c5e82c10e8231c2b11f77.zip | |
KVM: PPC: Book3S HV: POWER9 does not require secondary thread management
POWER9 CPUs have independent MMU contexts per thread, so KVM does not
need to quiesce secondary threads, so the hwthread_req/hwthread_state
protocol does not have to be used. So patch it away on POWER9, and patch
away the branch from the Linux idle wakeup to kvm_start_guest that is
never used.
Add a warning and error out of kvmppc_grab_hwthread in case it is ever
called on POWER9.
This avoids a hwsync in the idle wakeup path on POWER9.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
[mpe: Use WARN(...) instead of WARN_ON()/pr_err(...)]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions