diff options
| -rw-r--r-- | include/qemu/qemu-plugin.h | 26 | ||||
| -rw-r--r-- | plugins/loader.c | 23 |
2 files changed, 43 insertions, 6 deletions
diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index c213d1d..784f1df 100644 --- a/include/qemu/qemu-plugin.h +++ b/include/qemu/qemu-plugin.h @@ -38,9 +38,27 @@ typedef uint64_t qemu_plugin_id_t; +typedef struct { + /* string describing architecture */ + const char *target_name; + /* is this a full system emulation? */ + bool system_emulation; + union { + /* + * smp_vcpus may change if vCPUs can be hot-plugged, max_vcpus + * is the system-wide limit. + */ + struct { + int smp_vcpus; + int max_vcpus; + } system; + }; +} qemu_info_t; + /** * qemu_plugin_install() - Install a plugin * @id: this plugin's opaque ID + * @info: a block describing some details about the guest * @argc: number of arguments * @argv: array of arguments (@argc elements) * @@ -49,10 +67,14 @@ typedef uint64_t qemu_plugin_id_t; * Note: Calling qemu_plugin_uninstall() from this function is a bug. To raise * an error during install, return !0. * + * Note: @info is only live during the call. Copy any information we + * want to keep. + * * Note: @argv remains valid throughout the lifetime of the loaded plugin. */ -QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id, int argc, - char **argv); +QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id, + const qemu_info_t *info, + int argc, char **argv); /* * Prototypes for the various callback styles we will be registering diff --git a/plugins/loader.c b/plugins/loader.c index eaedff5..ce724ed 100644 --- a/plugins/loader.c +++ b/plugins/loader.c @@ -28,6 +28,10 @@ #include "hw/core/cpu.h" #include "cpu.h" #include "exec/exec-all.h" +#ifndef CONFIG_USER_ONLY +#include "hw/boards.h" +#endif + #include "plugin.h" /* @@ -58,7 +62,7 @@ QemuOptsList qemu_plugin_opts = { }, }; -typedef int (*qemu_plugin_install_func_t)(qemu_plugin_id_t, int, char **); +typedef int (*qemu_plugin_install_func_t)(qemu_plugin_id_t, const qemu_info_t *, int, char **); extern struct qemu_plugin_state plugin; @@ -145,7 +149,7 @@ static uint64_t xorshift64star(uint64_t x) return x * UINT64_C(2685821657736338717); } -static int plugin_load(struct qemu_plugin_desc *desc) +static int plugin_load(struct qemu_plugin_desc *desc, const qemu_info_t *info) { qemu_plugin_install_func_t install; struct qemu_plugin_ctx *ctx; @@ -193,7 +197,7 @@ static int plugin_load(struct qemu_plugin_desc *desc) } QTAILQ_INSERT_TAIL(&plugin.ctxs, ctx, entry); ctx->installing = true; - rc = install(ctx->id, desc->argc, desc->argv); + rc = install(ctx->id, info, desc->argc, desc->argv); ctx->installing = false; if (rc) { error_report("%s: qemu_plugin_install returned error code %d", @@ -241,11 +245,22 @@ static void plugin_desc_free(struct qemu_plugin_desc *desc) int qemu_plugin_load_list(QemuPluginList *head) { struct qemu_plugin_desc *desc, *next; + g_autofree qemu_info_t *info = g_new0(qemu_info_t, 1); + + info->target_name = TARGET_NAME; +#ifndef CONFIG_USER_ONLY + MachineState *ms = MACHINE(qdev_get_machine()); + info->system_emulation = true; + info->system.smp_vcpus = ms->smp.cpus; + info->system.max_vcpus = ms->smp.max_cpus; +#else + info->system_emulation = false; +#endif QTAILQ_FOREACH_SAFE(desc, head, entry, next) { int err; - err = plugin_load(desc); + err = plugin_load(desc, info); if (err) { return err; } |