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| author | Marc Zyngier <maz@kernel.org> | 2022-04-19 19:27:49 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-04-20 13:24:44 +0100 |
| commit | daf85a5f6be33788e18ff3efad1d7c3ad66a8cb3 (patch) | |
| tree | 008707fd27ba54bb589a748d8f1b6d447c4d2e66 /arch/arm64/kvm/arch_timer.c | |
| parent | b57de4ffd7c6d1247fdaef8437450ab7c1dd4ed0 (diff) | |
| download | linux-daf85a5f6be33788e18ff3efad1d7c3ad66a8cb3.tar.bz2 | |
KVM: arm64: Introduce kvm_counter_compute_delta() helper
Refactor kvm_timer_compute_delta() and extract a helper that
compute the delta (in ns) between a given timer and an arbitrary
value.
No functional change expected.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220419182755.601427-5-maz@kernel.org
Diffstat (limited to 'arch/arm64/kvm/arch_timer.c')
| -rw-r--r-- | arch/arm64/kvm/arch_timer.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/arch/arm64/kvm/arch_timer.c b/arch/arm64/kvm/arch_timer.c index 16dda1a383a6..c92a68190f6a 100644 --- a/arch/arm64/kvm/arch_timer.c +++ b/arch/arm64/kvm/arch_timer.c @@ -208,18 +208,16 @@ static irqreturn_t kvm_arch_timer_handler(int irq, void *dev_id) return IRQ_HANDLED; } -static u64 kvm_timer_compute_delta(struct arch_timer_context *timer_ctx) +static u64 kvm_counter_compute_delta(struct arch_timer_context *timer_ctx, + u64 val) { - u64 cval, now; - - cval = timer_get_cval(timer_ctx); - now = kvm_phys_timer_read() - timer_get_offset(timer_ctx); + u64 now = kvm_phys_timer_read() - timer_get_offset(timer_ctx); - if (now < cval) { + if (now < val) { u64 ns; ns = cyclecounter_cyc2ns(timecounter->cc, - cval - now, + val - now, timecounter->mask, &timecounter->frac); return ns; @@ -228,6 +226,11 @@ static u64 kvm_timer_compute_delta(struct arch_timer_context *timer_ctx) return 0; } +static u64 kvm_timer_compute_delta(struct arch_timer_context *timer_ctx) +{ + return kvm_counter_compute_delta(timer_ctx, timer_get_cval(timer_ctx)); +} + static bool kvm_timer_irq_can_fire(struct arch_timer_context *timer_ctx) { WARN_ON(timer_ctx && timer_ctx->loaded); |