Since QEMU commit 83ad95957c7e ("pl031: Expose RTCICR as proper WC
register") the PL031 test gets into an infinite loop. Now we must
write bit zero of RTCICR to clear the IRQ status. Before, writing
anything to RTCICR would work. As '1' is a member of 'anything'
writing it should work for old QEMU as well.
Cc: Alexander Graf <graf@xxxxxxxxxx>
Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
---
arm/pl031.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arm/pl031.c b/arm/pl031.c
index 1f63ef13994f..3b75fd653e96 100644
--- a/arm/pl031.c
+++ b/arm/pl031.c
@@ -143,8 +143,8 @@ static void irq_handler(struct pt_regs *regs)
report(readl(&pl031->ris) == 1, " RTC RIS == 1");
report(readl(&pl031->mis) == 1, " RTC MIS == 1");
- /* Writing any value should clear IRQ status */
- writel(0x80000000ULL, &pl031->icr);
+ /* Writing one to bit zero should clear IRQ status */
+ writel(1, &pl031->icr);
report(readl(&pl031->ris) == 0, " RTC RIS == 0");
report(readl(&pl031->mis) == 0, " RTC MIS == 0");
--
2.21.0
