[PATCH 3/8] tests/qtest/boot-serial-test: Only use available accelerators

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

For example, avoid when TCG is disabled:

  $ make check-qtest-aarch64
  ...
  18/20 qemu:qtest+qtest-aarch64 / qtest-aarch64/boot-serial-test
  qemu-system-aarch64: -accel tcg: invalid accelerator tcg

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 tests/qtest/boot-serial-test.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/tests/qtest/boot-serial-test.c b/tests/qtest/boot-serial-test.c
index fccf706f99..f8d0c684c2 100644
--- a/tests/qtest/boot-serial-test.c
+++ b/tests/qtest/boot-serial-test.c
@@ -17,6 +17,9 @@
 #include "libqtest.h"
 #include "libqos/libqos-spapr.h"
 
+static bool has_tcg;
+static bool has_kvm;
+
 static const uint8_t bios_avr[] = {
     0x88, 0xe0,             /* ldi r24, 0x08   */
     0x80, 0x93, 0xc1, 0x00, /* sts 0x00C1, r24 ; Enable tx */
@@ -264,8 +267,12 @@ static void test_machine(const void *data)
      * Make sure that this test uses tcg if available: It is used as a
      * fast-enough smoketest for that.
      */
-    g_string_append(cmd, "-accel tcg ");
-    g_string_append(cmd, "-accel kvm ");
+    if (has_tcg) {
+        g_string_append(cmd, "-accel tcg ");
+    }
+    if (has_kvm) {
+        g_string_append(cmd, "-accel kvm ");
+    }
     g_string_append(cmd, test->extra);
 
     qts = qtest_init(cmd->str);
@@ -292,6 +299,9 @@ int main(int argc, char *argv[])
     const char *arch = qtest_get_arch();
     int i;
 
+    has_tcg = qtest_has_accel("tcg");
+    has_kvm = qtest_has_accel("kvm");
+
     g_test_init(&argc, &argv, NULL);
 
     for (i = 0; tests[i].arch != NULL; i++) {
-- 
2.38.1