[PATCH 3/4] KVM: arm/arm64: Check for broadcast TLBI support

[Matthias Brugger]

KVM awaits a working broadcast TLBI implementation.
Error out early when this is not provided by the
hardware.

Signed-off-by: Matthias Brugger <mbrugger at suse.com>
---
 arch/arm/kvm/arm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index f1bde7c..e627fac 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -1376,6 +1376,11 @@ int kvm_arch_init(void *opaque)
 	int err;
 	int ret, cpu;
 
+	if (cpus_have_cap(ARM64_HAS_NO_BCAST_TLBI)) {
+		kvm_err("Missing broadcast TLBI support.\n");
+		return -ENODEV;
+	}
+
 	if (!is_hyp_mode_available()) {
 		kvm_err("HYP mode not available\n");
 		return -ENODEV;
-- 
2.6.6