diff options
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-v3.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index 722bdebdfbb5..4b2b62b73470 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -435,6 +435,12 @@ out: DEFINE_STATIC_KEY_FALSE(vgic_v3_cpuif_trap); +static int __init early_group1_trap_cfg(char *buf) +{ + return strtobool(buf, &group1_trap); +} +early_param("kvm-arm.vgic_v3_group1_trap", early_group1_trap_cfg); + /** * vgic_v3_probe - probe for a GICv3 compatible interrupt controller in DT * @node: pointer to the DT node @@ -486,6 +492,11 @@ int vgic_v3_probe(const struct gic_kvm_info *info) if (kvm_vgic_global_state.vcpu_base == 0) kvm_info("disabling GICv2 emulation\n"); + if (group1_trap) { + kvm_info("GICv3 sysreg trapping enabled (reduced performance)\n"); + static_branch_enable(&vgic_v3_cpuif_trap); + } + kvm_vgic_global_state.vctrl_base = NULL; kvm_vgic_global_state.type = VGIC_V3; kvm_vgic_global_state.max_gic_vcpus = VGIC_V3_MAX_CPUS; |