Hibernation makes use of broadcast TLBI. Error out
early when this is not supported by the hardware.
Signed-off-by: Matthias Brugger <mbrugger@xxxxxxxx>
---
arch/arm64/kernel/hibernate.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index 21ab5df..7269642 100644
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c
@@ -481,6 +481,11 @@ static int check_boot_cpu_online_pm_callback(struct notifier_block *nb,
static int __init check_boot_cpu_online_init(void)
{
+ if (cpus_have_cap(ARM64_HAS_NO_BCAST_TLBI)) {
+ pr_err("Can't hibernate: missing broadcast TLBI support.\n");
+ return -EINVAL;
+ }
+
/*
* Set this pm_notifier callback with a lower priority than
* cpu_hotplug_pm_callback, so that cpu_hotplug_pm_callback will be
--
2.6.6
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