From db728c2f7fff23446feeeaf3b3f16189a18a8f1e Mon Sep 17 00:00:00 2001
From: Julian Bouzas <julian.bouzas@collabora.com>
Date: Fri, 14 Jan 2022 14:34:38 -0500
Subject: [PATCH] core: add API to check if running in a virtual machine

---
 lib/wp/core.c                      | 26 ++++++++++++++++++++++++++
 lib/wp/core.h                      |  5 +++++
 modules/module-lua-scripting/api.c |  9 +++++++++
 3 files changed, 40 insertions(+)

diff --git a/lib/wp/core.c b/lib/wp/core.c
index 23f6f35f..3713135c 100644
--- a/lib/wp/core.c
+++ b/lib/wp/core.c
@@ -15,6 +15,7 @@
 #include <pipewire/pipewire.h>
 
 #include <spa/utils/result.h>
+#include <spa/support/cpu.h>
 #include <spa/debug/types.h>
 
 /*
@@ -986,6 +987,31 @@ wp_core_get_registry (WpCore * self)
   return &self->registry;
 }
 
+/*!
+ * \brief Checks whether core is a guest running in a virtual machine or not.
+ *
+ * \ingroup wpcore
+ * \param self the core
+ * \returns: TRUE if core is a guest, FALSE otherwise
+ */
+gboolean
+wp_core_is_guest (WpCore * self)
+{
+  const struct spa_support *support;
+  uint32_t n_support;
+  struct spa_cpu *cpu;
+
+  g_return_val_if_fail (WP_IS_CORE (self), FALSE);
+  g_return_val_if_fail (self->pw_context, FALSE);
+
+  support = pw_context_get_support (self->pw_context, &n_support);
+  cpu = spa_support_find (support, n_support, SPA_TYPE_INTERFACE_CPU);
+  if (!cpu)
+    return FALSE;
+
+  return spa_cpu_get_vm_type (cpu) != SPA_CPU_VM_NONE;
+}
+
 WpCore *
 wp_registry_get_core (WpRegistry * self)
 {
diff --git a/lib/wp/core.h b/lib/wp/core.h
index 07a6125b..8efb922d 100644
--- a/lib/wp/core.h
+++ b/lib/wp/core.h
@@ -115,6 +115,11 @@ WP_API
 gboolean wp_core_sync_finish (WpCore * self, GAsyncResult * res,
     GError ** error);
 
+/* Misc */
+
+WP_API
+gboolean wp_core_is_guest (WpCore * self);
+
 /* Object Manager */
 
 WP_API
diff --git a/modules/module-lua-scripting/api.c b/modules/module-lua-scripting/api.c
index 876b4f6f..27033027 100644
--- a/modules/module-lua-scripting/api.c
+++ b/modules/module-lua-scripting/api.c
@@ -228,6 +228,14 @@ core_require_api (lua_State *L)
   return wp_require_api_transition_new_from_lua (L, core);
 }
 
+static int
+core_is_guest (lua_State *L)
+{
+  WpCore * core = get_wp_core (L);
+  lua_pushboolean (L, wp_core_is_guest (core));
+  return 1;
+}
+
 static const luaL_Reg core_funcs[] = {
   { "get_info", core_get_info },
   { "idle_add", core_idle_add },
@@ -235,6 +243,7 @@ static const luaL_Reg core_funcs[] = {
   { "sync", core_sync },
   { "quit", core_quit },
   { "require_api", core_require_api },
+  { "is_guest", core_is_guest },
   { NULL, NULL }
 };
 
-- 
GitLab