[PULL 08/23] softmmu/vl: Be less verbose about missing KVM when running the qtests

[Thomas Huth]

Some of the qtests use "-accel kvm -accel tcg" to run real guest code.
This causes some error messages when kvm is not available. We do not
really care about these messages since the fallback to tcg is expected
here. So let's silence them to avoid that they spoil the output of
the tests.

Unfortunately, we can not use the qtest_enabled() wrapper in this case,
since the qtest accelerator itself is not initialized. Thus we have to
test for the qtest_chrdev variable instead.

Message-Id: <20200710085020.28222-1-thuth@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 softmmu/vl.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/softmmu/vl.c b/softmmu/vl.c
index 5a11a62f78..254ee5e525 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -165,8 +165,9 @@ bool boot_strict;
 uint8_t *boot_splash_filedata;
 int only_migratable; /* turn it off unless user states otherwise */
 bool wakeup_suspend_enabled;
-
 int icount_align_option;
+static const char *qtest_chrdev;
+static const char *qtest_log;
 
 /* The bytes in qemu_uuid are in the order specified by RFC4122, _not_ in the
  * little-endian "wire format" described in the SMBIOS 2.6 specification.
@@ -2713,10 +2714,15 @@ static int do_configure_accelerator(void *opaque, 
QemuOpts *opts, Error **errp)
     AccelClass *ac = accel_find(acc);
     AccelState *accel;
     int ret;
+    bool qtest_with_kvm;
+
+    qtest_with_kvm = g_str_equal(acc, "kvm") && qtest_chrdev != NULL;
 
     if (!ac) {
         *p_init_failed = true;
-        error_report("invalid accelerator %s", acc);
+        if (!qtest_with_kvm) {
+            error_report("invalid accelerator %s", acc);
+        }
         return 0;
     }
     accel = ACCEL(object_new_with_class(OBJECT_CLASS(ac)));
@@ -2728,8 +2734,9 @@ static int do_configure_accelerator(void *opaque, 
QemuOpts *opts, Error **errp)
     ret = accel_init_machine(accel, current_machine);
     if (ret < 0) {
         *p_init_failed = true;
-        error_report("failed to initialize %s: %s",
-                     acc, strerror(-ret));
+        if (!qtest_with_kvm || ret != -ENOENT) {
+            error_report("failed to initialize %s: %s", acc, strerror(-ret));
+        }
         return 0;
     }
 
@@ -2800,7 +2807,7 @@ static void configure_accelerators(const char *progname)
         exit(1);
     }
 
-    if (init_failed) {
+    if (init_failed && !qtest_chrdev) {
         AccelClass *ac = ACCEL_GET_CLASS(current_accel());
         error_report("falling back to %s", ac->name);
     }
@@ -2870,8 +2877,6 @@ void qemu_init(int argc, char **argv, char **envp)
     MachineClass *machine_class;
     const char *cpu_option;
     const char *vga_model = NULL;
-    const char *qtest_chrdev = NULL;
-    const char *qtest_log = NULL;
     const char *incoming = NULL;
     bool userconfig = true;
     bool nographic = false;
-- 
2.18.2