diff options
| author | Marc Zyngier <maz@kernel.org> | 2023-03-30 18:47:41 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-03-30 19:01:09 +0100 |
| commit | 0d0ae656b71155ccc0be9388beef77a1f7e7558e (patch) | |
| tree | 730aaccc2d4e322717589caa4f9e09ead005ab77 | |
| parent | e8d018dd0257f744ca50a729e3d042cf2ec9da65 (diff) | |
KVM: arm64: timers: Use a per-vcpu, per-timer accumulator for fractional ns
Instead of accumulating the fractional ns value generated every time
we compute a ns delta in a global variable, use a per-vcpu, per-timer
variable. This keeps the fractional ns local to the timer instead of
contributing to any odd, unrelated timer.
Reviewed-by: Colton Lewis <coltonlewis@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230330174800.2677007-2-maz@kernel.org
| -rw-r--r-- | arch/arm64/kvm/arch_timer.c | 2 | ||||
| -rw-r--r-- | include/kvm/arm_arch_timer.h | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/kvm/arch_timer.c b/arch/arm64/kvm/arch_timer.c index e1af4301b913..9515c645f03d 100644 --- a/arch/arm64/kvm/arch_timer.c +++ b/arch/arm64/kvm/arch_timer.c @@ -212,7 +212,7 @@ static u64 kvm_counter_compute_delta(struct arch_timer_context *timer_ctx, ns = cyclecounter_cyc2ns(timecounter->cc, val - now, timecounter->mask, - &timecounter->frac); + &timer_ctx->ns_frac); return ns; } diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h index c52a6e6839da..70d47c4adc6a 100644 --- a/include/kvm/arm_arch_timer.h +++ b/include/kvm/arm_arch_timer.h @@ -44,6 +44,7 @@ struct arch_timer_context { /* Emulated Timer (may be unused) */ struct hrtimer hrtimer; + u64 ns_frac; /* Offset for this counter/timer */ struct arch_timer_offset offset; |