KVM: arm64: vgic-v3: Log which GICv3 system registers are trapped

BugLink: https://bugs.launchpad.net/bugs/1673564
In order to facilitate debug, let's log which class of GICv3 system
registers are trapped.

Tested-by: Alexander Graf <agraf@suse.de>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
(cherry picked from commit 2873b5082c5fbe2037f12e8d2abc8ad8f8d82a1b)
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index 1dfd5a19a43c5a929c15c338c3b2f38cbf692898..d79c70badc3be05df58fb4d37781395b6803de83 100644 (file)
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -393,7 +393,10 @@ int vgic_v3_probe(const struct gic_kvm_info *info)
 #endif
 
        if (group0_trap || group1_trap || common_trap) {
-               kvm_info("GICv3 sysreg trapping enabled (reduced performance)\n");
+               kvm_info("GICv3 sysreg trapping enabled ([%s%s%s], reduced performance)\n",
+                        group0_trap ? "G0" : "",
+                        group1_trap ? "G1" : "",
+                        common_trap ? "C"  : "");
                static_branch_enable(&vgic_v3_cpuif_trap);
        }