KVM: selftests: Add vgic initialization for dirty log perf test for ARM

For ARM64, if no vgic is setup before the dirty log perf test, the
userspace irqchip would be used, which would affect the dirty log perf
test result.
Signed-off-by: Jing Zhang <jingzhangos@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220118015703.3630552-4-jingzhangos@google.com

tools/testing/selftests/kvm/dirty_log_perf_test.c

@@ -18,6 +18,12 @@
 #include "test_util.h"
 #include "perf_test_util.h"
 #include "guest_modes.h"
+#ifdef __aarch64__
+#include "aarch64/vgic.h"
+
+#define GICD_BASE_GPA			0x8000000ULL
+#define GICR_BASE_GPA			0x80A0000ULL
+#endif
 
 /* How many host loops to run by default (one KVM_GET_DIRTY_LOG for each loop)*/
 #define TEST_HOST_LOOP_N		2UL
@@ -200,6 +206,10 @@ static void run_test(enum vm_guest_mode mode, void *arg)
 		vm_enable_cap(vm, &cap);
 	}
 
+#ifdef __aarch64__
+	vgic_v3_setup(vm, nr_vcpus, 64, GICD_BASE_GPA, GICR_BASE_GPA);
+#endif
+
 	/* Start the iterations */
 	iteration = 0;
 	host_quit = false;