[PATCH] cpus: verify that number of created cpus do not exceed smp params

[Pavel Dovgalyuk]

Machine definitions may miss some vCPU-related parameters.
E.g., xlnx-versal-virt missed min_cpus and it was set to 1 by default.
This allowed using -smp 1 command line argument. But the machine
still created 2 vCPUs and passed all checks.
This patch adds one more check that does not allow creating
extra cpus that exceed the values specified in machine/smp.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgal...@ispras.ru>
---
 0 files changed

diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index 47cceddd80..da74794e09 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -603,6 +603,11 @@ void qemu_init_vcpu(CPUState *cpu)
 {
     MachineState *ms = MACHINE(qdev_get_machine());
 
+    if (cpu->cpu_index >= ms->smp.cpus) {
+        fprintf(stderr, "Machine definition error: trying to create too many 
CPUs\n");
+        exit(1);
+    }
+
     cpu->nr_cores = ms->smp.cores;
     cpu->nr_threads =  ms->smp.threads;
     cpu->stopped = true;