/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*
*/
-#include <cputypes.h>
-#include <platforms.h>
-
#include <kern/ast.h>
#include <kern/counters.h>
#include <kern/cpu_number.h>
#include <kern/thread.h>
#include <kern/processor.h>
#include <kern/spl.h>
-#include <kern/wait_queue.h>
+#include <kern/sfi.h>
+#if CONFIG_TELEMETRY
+#include <kern/telemetry.h>
+#endif
+#include <kern/waitq.h>
+#include <kern/ledger.h>
+#include <kperf/kperf_kpc.h>
#include <mach/policy.h>
#include <machine/trap.h> // for CHUD AST hook
+#include <machine/pal_routines.h>
+#include <security/mac_mach_internal.h> // for MACF AST hook
+
+volatile perfASTCallback perfASTHook;
+
void
ast_init(void)
{
}
+#ifdef CONFIG_DTRACE
+extern void dtrace_ast(void);
+#endif
+
/*
* Called at splsched.
*/
boolean_t preempt_trap = (reasons == AST_PREEMPTION);
ast_t *myast = ast_pending();
thread_t thread = current_thread();
+ perfASTCallback perf_hook = perfASTHook;
/*
* CHUD hook - all threads including idle processor threads
*/
- if(perfASTHook) {
- if(*myast & AST_CHUD_ALL) {
- perfASTHook(0, NULL, 0, 0);
+ if (perf_hook) {
+ if (*myast & AST_CHUD_ALL) {
+ (*perf_hook)(reasons, myast);
- if(*myast == AST_NONE) {
- return; // nothing left to do
- }
+ if (*myast == AST_NONE)
+ return;
}
- } else {
- *myast &= ~AST_CHUD_ALL;
}
+ else
+ *myast &= ~AST_CHUD_ALL;
reasons &= *myast;
*myast &= ~reasons;
* Check for urgent preemption.
*/
if ( (reasons & AST_URGENT) &&
- wait_queue_assert_possible(thread) ) {
+ waitq_wait_possible(thread) ) {
if (reasons & AST_PREEMPT) {
counter(c_ast_taken_block++);
thread_block_reason(THREAD_CONTINUE_NULL, NULL,
- AST_PREEMPT | AST_URGENT);
+ reasons & AST_PREEMPTION);
}
reasons &= ~AST_PREEMPTION;
if (!preempt_trap) {
ml_set_interrupts_enabled(enable);
+#if CONFIG_DTRACE
+ if (reasons & AST_DTRACE) {
+ dtrace_ast();
+ }
+#endif
+
#ifdef MACH_BSD
/*
* Handle BSD hook.
bsd_ast(thread);
}
#endif
-
+#if CONFIG_MACF
+ /*
+ * Handle MACF hook.
+ */
+ if (reasons & AST_MACF) {
+ thread_ast_clear(thread, AST_MACF);
+ mac_thread_userret(thread);
+ }
+#endif
/*
* Thread APC hook.
*/
- if (reasons & AST_APC)
- act_execute_returnhandlers();
+ if (reasons & AST_APC) {
+ thread_ast_clear(thread, AST_APC);
+ thread_apc_ast(thread);
+ }
- ml_set_interrupts_enabled(FALSE);
+ if (reasons & AST_GUARD) {
+ thread_ast_clear(thread, AST_GUARD);
+ guard_ast(thread);
+ }
- /*
- * Check for preemption.
+ if (reasons & AST_LEDGER) {
+ thread_ast_clear(thread, AST_LEDGER);
+ ledger_ast(thread);
+ }
+
+ /*
+ * Kernel Profiling Hook
*/
- if (reasons & AST_PREEMPT) {
- processor_t myprocessor = current_processor();
+ if (reasons & AST_KPERF) {
+ thread_ast_clear(thread, AST_KPERF);
+ kperf_kpc_thread_ast(thread);
+ }
- if (csw_needed(thread, myprocessor))
- reasons = AST_PREEMPT;
- else
- reasons = AST_NONE;
+#if CONFIG_TELEMETRY
+ if (reasons & AST_TELEMETRY_ALL) {
+ boolean_t interrupted_userspace = FALSE;
+ boolean_t io_telemetry = FALSE;
+
+ assert((reasons & AST_TELEMETRY_ALL) != AST_TELEMETRY_ALL); /* only one is valid at a time */
+ interrupted_userspace = (reasons & AST_TELEMETRY_USER) ? TRUE : FALSE;
+ io_telemetry = ((reasons & AST_TELEMETRY_IO) ? TRUE : FALSE);
+ thread_ast_clear(thread, AST_TELEMETRY_ALL);
+ telemetry_ast(thread, interrupted_userspace, io_telemetry);
+ }
+#endif
+
+ ml_set_interrupts_enabled(FALSE);
+
+#if CONFIG_SCHED_SFI
+ if (reasons & AST_SFI) {
+ sfi_ast(thread);
}
- if ( (reasons & AST_PREEMPT) &&
- wait_queue_assert_possible(thread) ) {
+#endif
+
+ /*
+ * Check for preemption. Conditions may have changed from when the AST_PREEMPT was originally set.
+ */
+ thread_lock(thread);
+ if (reasons & AST_PREEMPT)
+ reasons = csw_check(current_processor(), reasons & AST_QUANTUM);
+ thread_unlock(thread);
+
+ assert(waitq_wait_possible(thread));
+
+ if (reasons & AST_PREEMPT) {
counter(c_ast_taken_block++);
- thread_block_reason((thread_continue_t)thread_exception_return, NULL, AST_PREEMPT);
+ thread_block_reason((thread_continue_t)thread_exception_return, NULL, reasons & AST_PREEMPTION);
}
}
}
*/
void
ast_check(
- processor_t processor)
+ processor_t processor)
{
- register thread_t thread = processor->active_thread;
+ thread_t thread = processor->active_thread;
- processor->current_pri = thread->sched_pri;
- if ( processor->state == PROCESSOR_RUNNING ||
- processor->state == PROCESSOR_SHUTDOWN ) {
- register ast_t preempt;
+ if (processor->state == PROCESSOR_RUNNING ||
+ processor->state == PROCESSOR_SHUTDOWN) {
+ ast_t preempt;
/*
* Propagate thread ast to processor.
*/
+ pal_ast_check(thread);
+
ast_propagate(thread->ast);
/*
* Context switch check.
*/
- if ((preempt = csw_check(thread, processor)) != AST_NONE)
+ thread_lock(thread);
+
+ processor->current_pri = thread->sched_pri;
+ processor->current_thmode = thread->sched_mode;
+ processor->current_sfi_class = thread->sfi_class = sfi_thread_classify(thread);
+
+ if ((preempt = csw_check(processor, AST_NONE)) != AST_NONE)
ast_on(preempt);
+
+ thread_unlock(thread);
}
}
+
+/*
+ * Set AST flags on current processor
+ * Called at splsched
+ */
+void
+ast_on(ast_t reasons)
+{
+ ast_t *pending_ast = ast_pending();
+
+ *pending_ast |= reasons;
+}
+
+/*
+ * Clear AST flags on current processor
+ * Called at splsched
+ */
+void
+ast_off(ast_t reasons)
+{
+ ast_t *pending_ast = ast_pending();
+
+ *pending_ast &= ~reasons;
+}
+
+/*
+ * Re-set current processor's per-thread AST flags to those set on thread
+ * Called at splsched
+ */
+void
+ast_context(thread_t thread)
+{
+ ast_t *pending_ast = ast_pending();
+
+ *pending_ast = ((*pending_ast & ~AST_PER_THREAD) | thread->ast);
+}
+
+void
+ast_dtrace_on(void)
+{
+ ast_on(AST_DTRACE);
+}
+
projects / apple / xnu.git / blobdiff