[Minios-devel] [UNIKRAFT RFC PATCH 2/6] plat/kvm: Implement time_block_until for arm64

[Jianyong Wu <jianyong.wu@xxxxxxx>]

From: Wei Chen <Wei.Chen@xxxxxxx>

As we haven't implement full functions for timer for arm64.
But this function is needed by Unikraft. So we impplement
a temporary function to make compiler happy.

Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
---
 plat/common/arm/time.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/plat/common/arm/time.c b/plat/common/arm/time.c
index 93b0521..8457511 100644
--- a/plat/common/arm/time.c
+++ b/plat/common/arm/time.c
@@ -139,6 +139,21 @@ static int generic_timer_init(void)
        return 0;
 }

+long sched_have_pending_events;
+
+void time_block_until(__snsec until)
+{
+       while ((__snsec) ukplat_monotonic_clock() < until) {
+               /*
+                * TODO:
+                * As we haven't support interrupt on Arm, so we just
+                * use busy polling for now.
+                */
+               if (ukarch_test_and_clr_bit(0, &sched_have_pending_events))
+               break;
+       }
+}
+
 /* return ns since time_init() */
 __nsec ukplat_monotonic_clock(void)
 {
--
2.7.4

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