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pl(pc): fix overflow in deadline calculation

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Loïc Grégoire
2026-07-03 10:27:41 -04:00
parent 120b41c8ca
commit b559b8dbf7
1 changed files with 5 additions and 1 deletions
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src/platform/pc/apic.zig
+5 -1
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@@ -199,7 +199,11 @@ fn timer_init() linksection(r.init) void {
pub fn arm_timer(ns: r.Nanoseconds) void {
if (amd64.cpu_features.tsc_deadline) {
const now = amd64.rdtsc();
const deadline = now + (ns * tsc.tsc_timer.frequency / std.time.ns_per_s);
const delta: u64 = @intCast((@as(u128, ns) * tsc.tsc_timer.frequency) / std.time.ns_per_s);
const deadline = now +% delta;
amd64.write_msr(.TscDeadline, deadline);
return;
}