Merge tag 'pull-10.0-final-fixes-090425-1' of https://gitlab.com/stsquad/qemu into staging

Final fixes for 10.0

 - properly exit aarch64-softmmu tcg tests on unexpected exceptions
 - fix deadlock when uninstalling a plugin

# -----BEGIN PGP SIGNATURE-----
#
# iQEzBAABCgAdFiEEZoWumedRZ7yvyN81+9DbCVqeKkQFAmf2P+0ACgkQ+9DbCVqe
# KkTHdAf/b4CGLNJBS7UV/eYxhgxJ2TM4KgfXm4FvrcS4V5rpNheMuLoQzgYDY+EC
# 5ioANRcY+rOK2Yd+upO4SbaUyAvf7C5kAtMgs6AYiqbm5F8b47FS/q8f9mBBJ+qB
# tl2FU6hjVjymMRoaPqqpPkkkHy9YNHe48TP4ohGfD6336JA5MW6v8nhdK+d3fsan
# AUCSWAe8gxjmM6qnrhku6vvJ5EOiqpsb8zhsWVXdZesSG+1ATm6KCo6hDd0OkMrk
# si6ML5txU1rxx5VOkGlDUo7ZV2TE/zdgMyaP/kXGtKuj+ipLMzqNjlD50xPJu05b
# o4hTbt8erzxduVHrBKT5qhKQl8BEpw==
# =LN/t
# -----END PGP SIGNATURE-----
# gpg: Signature made Wed 09 Apr 2025 05:37:49 EDT
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* tag 'pull-10.0-final-fixes-090425-1' of https://gitlab.com/stsquad/qemu:
  tests/tcg/plugins: add plugin to test reset and uninstall
  plugins/loader: fix deadlock when resetting/uninstalling a plugin
  tests/tcg: fix semihosting SYS_EXIT for aarch64 in boot.S

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

4 files changed, 77 insertions, 5 deletions

diff --git a/plugins/loader.c b/plugins/loader.c
index 7523d55..0d6e082 100644
--- a/plugins/loader.c
+++ b/plugins/loader.c
@@ -370,7 +370,7 @@ static void plugin_reset_destroy(struct qemu_plugin_reset_data *data)
 {
     qemu_rec_mutex_lock(&plugin.lock);
     plugin_reset_destroy__locked(data);
-    qemu_rec_mutex_lock(&plugin.lock);
+    qemu_rec_mutex_unlock(&plugin.lock);
 }
 
 static void plugin_flush_destroy(CPUState *cpu, run_on_cpu_data arg)
diff --git a/tests/tcg/aarch64/system/boot.S b/tests/tcg/aarch64/system/boot.S
index 4eb1b35..a5df9c1 100644
--- a/tests/tcg/aarch64/system/boot.S
+++ b/tests/tcg/aarch64/system/boot.S
@@ -73,9 +73,8 @@ lower_a32_serror:
 	mov	x0, SYS_WRITE0
 	adr	x1, .error
 	semihosting_call
-	mov	x0, SYS_EXIT
-	mov	x1, 1
-	semihosting_call
+	mov	x0, 1 /* EXIT_FAILURE */
+	bl 	_exit
 	/* never returns */
 
 	.section .rodata
diff --git a/tests/tcg/plugins/meson.build b/tests/tcg/plugins/meson.build
index c8cb062..41f02f2 100644
--- a/tests/tcg/plugins/meson.build
+++ b/tests/tcg/plugins/meson.build
@@ -1,6 +1,6 @@
 t = []
 if get_option('plugins')
-  foreach i : ['bb', 'empty', 'inline', 'insn', 'mem', 'syscall']
+  foreach i : ['bb', 'empty', 'inline', 'insn', 'mem', 'reset', 'syscall']
     if host_os == 'windows'
       t += shared_module(i, files(i + '.c') + '../../../contrib/plugins/win32_linker.c',
                         include_directories: '../../../include/qemu',
diff --git a/tests/tcg/plugins/reset.c b/tests/tcg/plugins/reset.c
new file mode 100644
index 0000000..1be8be2
--- /dev/null
+++ b/tests/tcg/plugins/reset.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2025 Linaro Ltd
+ *
+ * Test the reset/uninstall cycle of a plugin.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <glib.h>
+
+#include <qemu-plugin.h>
+
+QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
+static qemu_plugin_id_t plugin_id;
+static bool was_reset;
+static bool was_uninstalled;
+
+static void after_uninstall(qemu_plugin_id_t id)
+{
+    g_assert(was_reset && !was_uninstalled);
+    qemu_plugin_outs("uninstall done\n");
+    was_uninstalled = true;
+}
+
+static void tb_exec_after_reset(unsigned int vcpu_index, void *userdata)
+{
+    g_assert(was_reset && !was_uninstalled);
+    qemu_plugin_uninstall(plugin_id, after_uninstall);
+}
+
+static void tb_trans_after_reset(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
+{
+    g_assert(was_reset && !was_uninstalled);
+    qemu_plugin_register_vcpu_tb_exec_cb(tb, tb_exec_after_reset,
+                                         QEMU_PLUGIN_CB_NO_REGS, NULL);
+}
+
+static void after_reset(qemu_plugin_id_t id)
+{
+    g_assert(!was_reset && !was_uninstalled);
+    qemu_plugin_outs("reset done\n");
+    was_reset = true;
+    qemu_plugin_register_vcpu_tb_trans_cb(id, tb_trans_after_reset);
+}
+
+static void tb_exec_before_reset(unsigned int vcpu_index, void *userdata)
+{
+    g_assert(!was_reset && !was_uninstalled);
+    qemu_plugin_reset(plugin_id, after_reset);
+}
+
+static void tb_trans_before_reset(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
+{
+    g_assert(!was_reset && !was_uninstalled);
+    qemu_plugin_register_vcpu_tb_exec_cb(tb, tb_exec_before_reset,
+                                         QEMU_PLUGIN_CB_NO_REGS, NULL);
+}
+
+QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
+                                           const qemu_info_t *info,
+                                           int argc, char **argv)
+{
+    plugin_id = id;
+    qemu_plugin_register_vcpu_tb_trans_cb(id, tb_trans_before_reset);
+    return 0;
+}
+
+/* Since we uninstall the plugin, we can't use qemu_plugin_register_atexit_cb,
+ * so we use destructor attribute instead. */
+static void __attribute__((destructor)) on_plugin_exit(void)
+{
+    g_assert(was_reset && was_uninstalled);
+    qemu_plugin_outs("plugin exit\n");
+}