From: Daan De Meyer <daan@amutable.com>
Date: Fri, 27 Mar 2026 13:24:00 +0000 (+0100)
Subject: vmspawn: Use qemu config file for smp and memory
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=73c0a797893f2fb8dcf70d883bbef2b9163f015d;p=thirdparty%2Fsystemd.git

vmspawn: Use qemu config file for smp and memory

Pass -no-user-config while we're at it to avoid loading qemu config
from /etc which is more likely to cause hard to debug issues rather
than do something useful.
---

diff --git a/src/vmspawn/vmspawn.c b/src/vmspawn/vmspawn.c
index 18f2833ae7f..0de314ac183 100644
--- a/src/vmspawn/vmspawn.c
+++ b/src/vmspawn/vmspawn.c
@@ -2308,6 +2308,16 @@ static int run_virtual_machine(int kvm_device_fd, int vhost_device_fd) {
                         return r;
         }
 
+        r = qemu_config_section(config_file, "smp-opts", /* id= */ NULL,
+                                "cpus", arg_cpus ?: "1");
+        if (r < 0)
+                return r;
+
+        r = qemu_config_section(config_file, "memory", /* id= */ NULL,
+                                "size", mem);
+        if (r < 0)
+                return r;
+
         r = qemu_config_section(config_file, "object", "rng0",
                                 "qom-type", "rng-random",
                                 "filename", "/dev/urandom");
@@ -2349,8 +2359,7 @@ static int run_virtual_machine(int kvm_device_fd, int vhost_device_fd) {
 
         /* Start building the cmdline for items that must remain as command line arguments */
         cmdline = strv_new(qemu_binary,
-                           "-smp", arg_cpus ?: "1",
-                           "-m", mem);
+                           "-no-user-config");
         if (!cmdline)
                 return log_oom();