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Message-Id: <200610091410.k99EAORY026218@frankl.hpl.hp.com>
Date: Mon, 9 Oct 2006 07:10:25 -0700
From: Stephane Eranian <eranian@...nkl.hpl.hp.com>
To: linux-kernel@...r.kernel.org
Cc: eranian@....hp.com
Subject: [PATCH 17/21] 2.6.18 perfmon2 : modified powerpc files
This patch contains the modified powerpc files.
The modified files are as follows:
arch/powerpc/Kconfig:
- add link to perfmon menuconfig options
arch/powerpc/Makefile:
- add perfmon subdir
arch/powerpc/kernel/entry_64.S:
- add hook for extra work before kernel exit. Need to block a thread after a overflow with
user level notification. Also needed to do some bookeeeping, such as reset certain counters
and cleanup in some difficult corner cases
arch/powerpc/kernel/process.c:
- add hook in exit_thread() to cleanup perfmon2 context
- add hook in copy_thread() to cleanup perfmon2 context in child (perfmon2 context
is never inherited)
- add hook in __switch_to() for PMU state save/restore
arch/powerpc/kernel/systbl.S:
- add new system calls definitions
include/asm-powerpc/thread_info.h:
- add TIF_PERFMON which is used for PMU context switching in __switch_to()
include/asm-powerpc/unistd.h:
- add new system calls
diff -urp linux-2.6.18.base/arch/powerpc/Kconfig linux-2.6.18/arch/powerpc/Kconfig
--- linux-2.6.18.base/arch/powerpc/Kconfig 2006-09-21 23:45:09.000000000 -0700
+++ linux-2.6.18/arch/powerpc/Kconfig 2006-09-22 01:58:48.000000000 -0700
@@ -320,6 +320,9 @@ config NOT_COHERENT_CACHE
bool
depends on 4xx || 8xx || E200
default y
+
+source "arch/powerpc/perfmon/Kconfig"
+
endmenu
source "init/Kconfig"
diff -urp linux-2.6.18.base/arch/powerpc/Makefile linux-2.6.18/arch/powerpc/Makefile
--- linux-2.6.18.base/arch/powerpc/Makefile 2006-09-21 23:45:09.000000000 -0700
+++ linux-2.6.18/arch/powerpc/Makefile 2006-09-22 01:58:48.000000000 -0700
@@ -134,6 +134,7 @@ core-y += arch/powerpc/kernel/ \
arch/powerpc/platforms/
core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/
core-$(CONFIG_XMON) += arch/powerpc/xmon/
+core-$(CONFIG_PERFMON) += arch/powerpc/perfmon/
drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
diff -urp linux-2.6.18.base/arch/powerpc/kernel/entry_64.S linux-2.6.18/arch/powerpc/kernel/entry_64.S
--- linux-2.6.18.base/arch/powerpc/kernel/entry_64.S 2006-09-21 23:45:09.000000000 -0700
+++ linux-2.6.18/arch/powerpc/kernel/entry_64.S 2006-09-22 01:58:48.000000000 -0700
@@ -568,6 +568,9 @@ user_work:
b .ret_from_except_lite
1: bl .save_nvgprs
+#ifdef CONFIG_PERFMON
+ bl .ppc64_pfm_handle_work
+#endif /* CONFIG_PERFMON */
li r3,0
addi r4,r1,STACK_FRAME_OVERHEAD
bl .do_signal
diff -urp linux-2.6.18.base/arch/powerpc/kernel/process.c linux-2.6.18/arch/powerpc/kernel/process.c
--- linux-2.6.18.base/arch/powerpc/kernel/process.c 2006-09-21 23:45:09.000000000 -0700
+++ linux-2.6.18/arch/powerpc/kernel/process.c 2006-09-22 01:58:48.000000000 -0700
@@ -34,6 +34,7 @@
#include <linux/mqueue.h>
#include <linux/hardirq.h>
#include <linux/utsname.h>
+#include <linux/perfmon.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
@@ -325,6 +326,9 @@ struct task_struct *__switch_to(struct t
new_thread->start_tb = current_tb;
}
#endif
+ if (test_tsk_thread_flag(new, TIF_PERFMON_CTXSW)
+ || test_tsk_thread_flag(prev, TIF_PERFMON_CTXSW))
+ pfm_ctxsw(prev, new);
local_irq_save(flags);
@@ -464,6 +468,7 @@ void show_regs(struct pt_regs * regs)
void exit_thread(void)
{
discard_lazy_cpu_state();
+ pfm_exit_thread(current);
}
void flush_thread(void)
@@ -575,6 +580,7 @@ int copy_thread(int nr, unsigned long cl
kregs->nip = (unsigned long)ret_from_fork;
p->thread.last_syscall = -1;
#endif
+ pfm_copy_thread(p);
return 0;
}
Only in linux-2.6.18/arch/powerpc: perfmon
Only in linux-2.6.18/include/asm-powerpc: perfmon.h
diff -urp linux-2.6.18.base/include/asm-powerpc/systbl.h linux-2.6.18/include/asm-powerpc/systbl.h
--- linux-2.6.18.base/include/asm-powerpc/systbl.h 2006-09-21 23:45:36.000000000 -0700
+++ linux-2.6.18/include/asm-powerpc/systbl.h 2006-09-22 02:27:07.000000000 -0700
@@ -304,3 +304,15 @@ SYSCALL_SPU(fchmodat)
SYSCALL_SPU(faccessat)
COMPAT_SYS_SPU(get_robust_list)
COMPAT_SYS_SPU(set_robust_list)
+SYSCALL(pfm_create_context)
+SYSCALL(pfm_write_pmcs)
+SYSCALL(pfm_write_pmds)
+SYSCALL(pfm_read_pmds)
+SYSCALL(pfm_load_context)
+SYSCALL(pfm_start)
+SYSCALL(pfm_stop)
+SYSCALL(pfm_restart)
+SYSCALL(pfm_create_evtsets)
+SYSCALL(pfm_getinfo_evtsets)
+SYSCALL(pfm_delete_evtsets)
+SYSCALL(pfm_unload_context)
diff -urp linux-2.6.18.base/include/asm-powerpc/thread_info.h linux-2.6.18/include/asm-powerpc/thread_info.h
--- linux-2.6.18.base/include/asm-powerpc/thread_info.h 2006-09-21 23:45:36.000000000 -0700
+++ linux-2.6.18/include/asm-powerpc/thread_info.h 2006-09-22 01:58:48.000000000 -0700
@@ -122,6 +122,8 @@ static inline struct thread_info *curren
#define TIF_RESTOREALL 12 /* Restore all regs (implies NOERROR) */
#define TIF_NOERROR 14 /* Force successful syscall return */
#define TIF_RESTORE_SIGMASK 15 /* Restore signal mask in do_signal */
+#define TIF_PERFMON_WORK 10 /* work for pfm_handle_work() */
+#define TIF_PERFMON_CTXSW 20 /* perfmon needs ctxsw calls */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
@@ -139,9 +141,12 @@ static inline struct thread_info *curren
#define _TIF_NOERROR (1<<TIF_NOERROR)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
+#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
+#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)
#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
- _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
+ _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK | \
+ _TIF_PERFMON_WORK)
#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
/* Bits in local_flags */
diff -urp linux-2.6.18.base/include/asm-powerpc/unistd.h linux-2.6.18/include/asm-powerpc/unistd.h
--- linux-2.6.18.base/include/asm-powerpc/unistd.h 2006-09-21 23:45:36.000000000 -0700
+++ linux-2.6.18/include/asm-powerpc/unistd.h 2006-09-22 02:04:28.000000000 -0700
@@ -323,10 +323,22 @@
#define __NR_faccessat 298
#define __NR_get_robust_list 299
#define __NR_set_robust_list 300
-
+#define __NR_pfm_create_context 301
+#define __NR_pfm_write_pmcs (__NR_pfm_create_context+1)
+#define __NR_pfm_write_pmds (__NR_pfm_create_context+2)
+#define __NR_pfm_read_pmds (__NR_pfm_create_context+3)
+#define __NR_pfm_load_context (__NR_pfm_create_context+4)
+#define __NR_pfm_start (__NR_pfm_create_context+5)
+#define __NR_pfm_stop (__NR_pfm_create_context+6)
+#define __NR_pfm_restart (__NR_pfm_create_context+7)
+#define __NR_pfm_create_evtsets (__NR_pfm_create_context+8)
+#define __NR_pfm_getinfo_evtsets (__NR_pfm_create_context+9)
+#define __NR_pfm_delete_evtsets (__NR_pfm_create_context+10)
+#define __NR_pfm_unload_context (__NR_pfm_create_context+11)
+
#ifdef __KERNEL__
-#define __NR_syscalls 301
+#define __NR_syscalls 312
#define __NR__exit __NR_exit
#define NR_syscalls __NR_syscalls
-
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