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-rw-r--r--hw/nvram/fw_cfg.c7
-rw-r--r--tests/fw_cfg-test.c21
2 files changed, 25 insertions, 3 deletions
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 44a3c19326..5d879c471e 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -237,7 +237,7 @@ static void fw_cfg_bootsplash(FWCfgState *s)
 static void fw_cfg_reboot(FWCfgState *s)
 {
     const char *reboot_timeout = NULL;
-    int64_t rt_val = -1;
+    uint64_t rt_val = -1;
     uint32_t rt_le32;
 
     /* get user configuration */
@@ -247,10 +247,11 @@ static void fw_cfg_reboot(FWCfgState *s)
 
     if (reboot_timeout) {
         rt_val = qemu_opt_get_number(opts, "reboot-timeout", -1);
+
         /* validate the input */
-        if (rt_val < 0 || rt_val > 0xffff) {
+        if (rt_val > 0xffff && rt_val != (uint64_t)-1) {
             error_report("reboot timeout is invalid,"
-                         "it should be a value between 0 and 65535");
+                         "it should be a value between -1 and 65535");
             exit(1);
         }
     }
diff --git a/tests/fw_cfg-test.c b/tests/fw_cfg-test.c
index 1d3147f821..5dc807ba23 100644
--- a/tests/fw_cfg-test.c
+++ b/tests/fw_cfg-test.c
@@ -194,6 +194,26 @@ static void test_fw_cfg_reboot_timeout(void)
     qtest_quit(s);
 }
 
+static void test_fw_cfg_no_reboot_timeout(void)
+{
+    QFWCFG *fw_cfg;
+    QTestState *s;
+    uint32_t reboot_timeout = 0;
+    size_t filesize;
+
+    /* Special value -1 means "don't reboot" */
+    s = qtest_init("-boot reboot-timeout=-1");
+    fw_cfg = pc_fw_cfg_init(s);
+
+    filesize = qfw_cfg_get_file(fw_cfg, "etc/boot-fail-wait",
+                                &reboot_timeout, sizeof(reboot_timeout));
+    g_assert_cmpint(filesize, ==, sizeof(reboot_timeout));
+    reboot_timeout = le32_to_cpu(reboot_timeout);
+    g_assert_cmpint(reboot_timeout, ==, UINT32_MAX);
+    pc_fw_cfg_uninit(fw_cfg);
+    qtest_quit(s);
+}
+
 static void test_fw_cfg_splash_time(void)
 {
     QFWCFG *fw_cfg;
@@ -233,6 +253,7 @@ int main(int argc, char **argv)
     qtest_add_func("fw_cfg/numa", test_fw_cfg_numa);
     qtest_add_func("fw_cfg/boot_menu", test_fw_cfg_boot_menu);
     qtest_add_func("fw_cfg/reboot_timeout", test_fw_cfg_reboot_timeout);
+    qtest_add_func("fw_cfg/no_reboot_timeout", test_fw_cfg_no_reboot_timeout);
     qtest_add_func("fw_cfg/splash_time", test_fw_cfg_splash_time);
 
     return g_test_run();