diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 19:52:03 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 21:08:59 +1100 |
| commit | 9a1e530bbbdaa2184993a7d7fc61d78871540ccd (patch) | |
| tree | 5833774a0d676fd979366875ff7d529521ecfb27 /arch/powerpc/kvm/book3s_hv.c | |
| parent | cb2553a093093ae46cfaee31321bcedcd0312c5d (diff) | |
KVM: PPC: Book3S HV P9: Avoid SPR scoreboard stalls
Avoid interleaving mfSPR and mtSPR to reduce SPR scoreboard stalls.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-26-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 3a9447f75a9e..75a674b5cd84 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4321,10 +4321,6 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit, store_spr_state(vcpu); - timer_rearm_host_dec(*tb); - - restore_p9_host_os_sprs(vcpu, &host_os_sprs); - store_fp_state(&vcpu->arch.fp); #ifdef CONFIG_ALTIVEC store_vr_state(&vcpu->arch.vr); @@ -4339,6 +4335,10 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit, switch_pmu_to_host(vcpu, &host_os_sprs); + timer_rearm_host_dec(*tb); + + restore_p9_host_os_sprs(vcpu, &host_os_sprs); + vc->entry_exit_map = 0x101; vc->in_guest = 0; |