Merge tag 'pull-maintainer-updates-280224-1' of https://gitlab.com/stsquad/qemu into staging

Testing, gdbstub and plugin updates:

  - fix some test/tcg license headers to GPLv2+
  - bump up check-tcg timeout to 120s
  - avoid re-building VM images too often
  - update OpenBSD to 7.4
  - use GDBFeature to build gdbstub XML
  - unify plugin vcpu count under qemu_plugin_num_vcpus
  - avoid spurious idle/resume callbacks on new vCPUs
  - ensure nios2-linux-user processes async work
  - call vcpu_init plugin callback through async work
  - define plugin helpers when registers being read
  - add plugin API for reading register values
  - add support for register tracking to execlog
  - update plugin docs with assumptions
  - mention plugins can trigger tb_flush in mttcg design doc

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* tag 'pull-maintainer-updates-280224-1' of https://gitlab.com/stsquad/qemu: (29 commits)
  docs/devel: plugins can trigger a tb flush
  docs/devel: document some plugin assumptions
  docs/devel: lift example and plugin API sections up
  contrib/plugins: extend execlog to track register changes
  contrib/plugins: fix imatch
  tests/tcg: expand insn test case to exercise register API
  plugins: add an API to read registers
  plugins: create CPUPluginState and migrate plugin_mask
  gdbstub: expose api to find registers
  plugins: Use different helpers when reading registers
  cpu: call plugin init hook asynchronously
  linux-user: ensure nios2 processes queued work
  plugins: fix order of init/idle/resume callback
  plugins: add qemu_plugin_num_vcpus function
  plugins: remove previous n_vcpus functions from API
  gdbstub: Add members to identify registers to GDBFeature
  hw/core/cpu: Remove gdb_get_dynamic_xml member
  gdbstub: Infer number of core registers from XML
  gdbstub: Simplify XML lookup
  gdbstub: Change gdb_get_reg_cb and gdb_set_reg_cb
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/plugin/insn.c b/tests/plugin/insn.c
index 5fd3017..54da06f 100644
--- a/tests/plugin/insn.c
+++ b/tests/plugin/insn.c
@@ -46,6 +46,25 @@ typedef struct {
     char *disas;
 } Instruction;
 
+/*
+ * Initialise a new vcpu with reading the register list
+ */
+static void vcpu_init(qemu_plugin_id_t id, unsigned int vcpu_index)
+{
+    g_autoptr(GArray) reg_list = qemu_plugin_get_registers();
+    g_autoptr(GByteArray) reg_value = g_byte_array_new();
+
+    if (reg_list) {
+        for (int i = 0; i < reg_list->len; i++) {
+            qemu_plugin_reg_descriptor *rd = &g_array_index(
+                reg_list, qemu_plugin_reg_descriptor, i);
+            int count = qemu_plugin_read_register(rd->handle, reg_value);
+            g_assert(count > 0);
+        }
+    }
+}
+
+
 static void vcpu_insn_exec_before(unsigned int cpu_index, void *udata)
 {
     unsigned int i = cpu_index % MAX_CPUS;
@@ -212,6 +231,8 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
         sizes = g_array_new(true, true, sizeof(unsigned long));
     }
 
+    /* Register init, translation block and exit callbacks */
+    qemu_plugin_register_vcpu_init_cb(id, vcpu_init);
     qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
     qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
     return 0;