1 files changed, 131 insertions, 0 deletions
diff --git a/plugins/api-system.c b/plugins/api-system.c
new file mode 100644
index 0000000..cc190b1
--- /dev/null
+++ b/plugins/api-system.c
@@ -0,0 +1,131 @@
+/*
+ * QEMU Plugin API - System specific implementations
+ *
+ * This provides the APIs that have a specific system implementation
+ * or are only relevant to system-mode.
+ *
+ * Copyright (C) 2017, Emilio G. Cota <cota@braap.org>
+ * Copyright (C) 2019-2025, Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/main-loop.h"
+#include "qapi/error.h"
+#include "migration/blocker.h"
+#include "hw/boards.h"
+#include "qemu/plugin-memory.h"
+#include "qemu/plugin.h"
+
+/*
+ * In system mode we cannot trace the binary being executed so the
+ * helpers all return NULL/0.
+ */
+const char *qemu_plugin_path_to_binary(void)
+{
+    return NULL;
+}
+
+uint64_t qemu_plugin_start_code(void)
+{
+    return 0;
+}
+
+uint64_t qemu_plugin_end_code(void)
+{
+    return 0;
+}
+
+uint64_t qemu_plugin_entry_code(void)
+{
+    return 0;
+}
+
+/*
+ * Virtual Memory queries
+ */
+
+static __thread struct qemu_plugin_hwaddr hwaddr_info;
+
+struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
+                                                  uint64_t vaddr)
+{
+    CPUState *cpu = current_cpu;
+    unsigned int mmu_idx = get_mmuidx(info);
+    enum qemu_plugin_mem_rw rw = get_plugin_meminfo_rw(info);
+    hwaddr_info.is_store = (rw & QEMU_PLUGIN_MEM_W) != 0;
+
+    assert(mmu_idx < NB_MMU_MODES);
+
+    if (!tlb_plugin_lookup(cpu, vaddr, mmu_idx,
+                           hwaddr_info.is_store, &hwaddr_info)) {
+        error_report("invalid use of qemu_plugin_get_hwaddr");
+        return NULL;
+    }
+
+    return &hwaddr_info;
+}
+
+bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr)
+{
+    return haddr->is_io;
+}
+
+uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr)
+{
+    if (haddr) {
+        return haddr->phys_addr;
+    }
+    return 0;
+}
+
+const char *qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *h)
+{
+    if (h && h->is_io) {
+        MemoryRegion *mr = h->mr;
+        if (!mr->name) {
+            unsigned maddr = (uintptr_t)mr;
+            g_autofree char *temp = g_strdup_printf("anon%08x", maddr);
+            return g_intern_string(temp);
+        } else {
+            return g_intern_string(mr->name);
+        }
+    } else {
+        return g_intern_static_string("RAM");
+    }
+}
+
+/*
+ * Time control
+ */
+static bool has_control;
+static Error *migration_blocker;
+
+const void *qemu_plugin_request_time_control(void)
+{
+    if (!has_control) {
+        has_control = true;
+        error_setg(&migration_blocker,
+                   "TCG plugin time control does not support migration");
+        migrate_add_blocker(&migration_blocker, NULL);
+        return &has_control;
+    }
+    return NULL;
+}
+
+static void advance_virtual_time__async(CPUState *cpu, run_on_cpu_data data)
+{
+    int64_t new_time = data.host_ulong;
+    qemu_clock_advance_virtual_time(new_time);
+}
+
+void qemu_plugin_update_ns(const void *handle, int64_t new_time)
+{
+    if (handle == &has_control) {
+        /* Need to execute out of cpu_exec, so bql can be locked. */
+        async_run_on_cpu(current_cpu,
+                         advance_virtual_time__async,
+                         RUN_ON_CPU_HOST_ULONG(new_time));
+    }
+}