xnu-3247.1.106.tar.gz

[apple/xnu.git] / bsd / kern / kern_kpc.c

diff --git a/bsd/kern/kern_kpc.c b/bsd/kern/kern_kpc.c
index dde93bbce390077794e0f4d2ea94670375ae4e15..3e3443fc3da7c30ada59c31be8b458167c242636 100644 (file)
--- a/bsd/kern/kern_kpc.c
+++ b/bsd/kern/kern_kpc.c
@@ -53,6 +53,7 @@
 #define REQ_PERIOD              (10)
 #define REQ_ACTIONID            (11)
 #define REQ_SW_INC              (14)
+#define REQ_PMU_VERSION         (15)
 
 /* Type-munging casts */
 typedef int (*getint_t)(void);
@@ -70,11 +71,6 @@ static void           *sysctl_buffer = NULL;
 
 typedef int (*setget_func_t)(int);
 
-/* init our stuff */
-extern void kpc_arch_init(void);
-extern void kpc_common_init(void);
-extern void kpc_thread_init(void); /* osfmk/kern/kpc_thread.c */
-
 void
 kpc_init(void)
 {
@@ -247,6 +243,9 @@ sysctl_kpc_get_config(uint32_t classes, void* buf)
 static int
 sysctl_kpc_set_config(uint32_t classes, void* buf)
 {
+       /* userspace cannot reconfigure the power class */
+       if (classes & KPC_CLASS_POWER_MASK)
+               return (EPERM);
        return kpc_set_config( classes, buf);
 }
 
@@ -259,6 +258,9 @@ sysctl_kpc_get_period(uint32_t classes, void* buf)
 static int
 sysctl_kpc_set_period(uint32_t classes, void* buf)
 {
+       /* userspace cannot reconfigure the power class */
+       if (classes & KPC_CLASS_POWER_MASK)
+               return (EPERM);
        return kpc_set_period( classes, buf);
 }
 
@@ -500,6 +502,10 @@ kpc_sysctl SYSCTL_HANDLER_ARGS
                ret = sysctl_set_int( req, (setget_func_t)kpc_set_sw_inc );
                break;          
 
+       case REQ_PMU_VERSION:
+               ret = sysctl_get_int(oidp, req, kpc_get_pmu_version());
+               break;
+
        default:
                ret = ENOENT;
                break;
@@ -533,6 +539,11 @@ SYSCTL_PROC(_kpc, OID_AUTO, thread_counting,
             (void*)REQ_THREAD_COUNTING, 
             sizeof(int), kpc_sysctl, "I", "Thread accumulation");
 
+SYSCTL_PROC(_kpc, OID_AUTO, pmu_version,
+            CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_ANYBODY,
+            (void *)REQ_PMU_VERSION,
+            sizeof(int), kpc_sysctl, "I", "PMU version for hardware");
+
 /* faux values */
 SYSCTL_PROC(_kpc, OID_AUTO, config_count,
             CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_ANYBODY,