diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 19:51:41 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 21:08:56 +1100 |
| commit | 5955c7469a73033f607ebd6d418058943fe13dd3 (patch) | |
| tree | 81741c2f1b2e197b469e6fd77577bbeb83ac832f /arch/powerpc/kvm/book3s_hv.c | |
| parent | 736df58fd5bcd02f811f7d474bbe02a35ffaa8f0 (diff) | |
KMV: PPC: Book3S HV P9: Use set_dec to set decrementer to host
The host Linux timer code arms the decrementer with the value
'decrementers_next_tb - current_tb' using set_dec(), which stores
val - 1 on Book3S-64, which is not quite the same as what KVM does
to re-arm the host decrementer when exiting the guest.
This shouldn't be a significant change, but it makes the logic match
and avoids this small extra change being brought into the next patch.
Suggested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-4-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 2777f66001a8..c7dbdec183b9 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4063,7 +4063,7 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit, vc->entry_exit_map = 0x101; vc->in_guest = 0; - mtspr(SPRN_DEC, local_paca->kvm_hstate.dec_expires - mftb()); + set_dec(local_paca->kvm_hstate.dec_expires - mftb()); /* We may have raced with new irq work */ if (test_irq_work_pending()) set_dec(1); |