From: Peter Maydell <peter.maydell@linaro.org>
Date: Tue, 29 Jan 2019 11:46:05 +0000 (+0000)
Subject: xlnx-zynqmp: Don't create rpu-cluster if there are no RPUs
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e5b517536cb47989236fbfe5bd69e644a1ff8467;p=qemu.git

xlnx-zynqmp: Don't create rpu-cluster if there are no RPUs

If we aren't going to create any RPUs, then don't create the
rpu-cluster unit. This allows us to add an assertion to the
cluster object that it contains at least one CPU, which helps
to avoid bugs in creating clusters and putting CPUs in them.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190121184314.14311-1-peter.maydell@linaro.org
---

diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index c67ac2e64a..70cbe6bd47 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -178,6 +178,11 @@ static void xlnx_zynqmp_create_rpu(XlnxZynqMPState *s, const char *boot_cpu,
     int i;
     int num_rpus = MIN(smp_cpus - XLNX_ZYNQMP_NUM_APU_CPUS, XLNX_ZYNQMP_NUM_RPU_CPUS);
 
+    if (num_rpus <= 0) {
+        /* Don't create rpu-cluster object if there's nothing to put in it */
+        return;
+    }
+
     object_initialize_child(OBJECT(s), "rpu-cluster", &s->rpu_cluster,
                             sizeof(s->rpu_cluster), TYPE_CPU_CLUSTER,
                             &error_abort, NULL);