[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 <mbrug...@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