improve timer handling

+ Previous code assumed a timer would only trigger when requested, but
  didn't explicitly disable timers during init. Newer versions of qemu
  (>= 10?) seem to have some kind of timer set, unsure if that's via
  OpenSBI or what exactly but some slower tests were failing because of
  it.

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/riscv64/kernel/timer.c b/arch/riscv64/kernel/timer.c
index c7752f8..e9e509d 100644
--- a/arch/riscv64/kernel/timer.c
+++ b/arch/riscv64/kernel/timer.c
@@ -24,6 +24,11 @@ void set_timer(ticks_t ticks)
 	sbi_set_timer(ticks);
 }
 
+void clear_timer()
+{
+	sbi_set_timer(-1);
+}
+
 /**
  * Get current ticks.
  *