Here's a 3-part patch kit which adds a ppc64 driver to perfctr,
written by David Gibson <[email protected]>.
ppc64 is sufficiently different from ppc32 that this driver
is kept separate from my ppc32 driver. This shouldn't matter unless
people actually want to run ppc32 kernels on ppc64 processors.
ppc64 perfctr driver from David Gibson <[email protected]>:
- ppc64 arch hooks: Kconfig, syscalls numbers and tables, task struct,
and process management ops (switch_to, exit, fork)
Signed-off-by: Mikael Pettersson <[email protected]>
arch/ppc64/Kconfig | 1 +
arch/ppc64/kernel/misc.S | 12 ++++++++++++
arch/ppc64/kernel/process.c | 6 ++++++
include/asm-ppc64/processor.h | 2 ++
include/asm-ppc64/unistd.h | 8 +++++++-
5 files changed, 28 insertions(+), 1 deletion(-)
diff -rupN linux-2.6.12-rc1-mm4/arch/ppc64/Kconfig linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/arch/ppc64/Kconfig
--- linux-2.6.12-rc1-mm4/arch/ppc64/Kconfig 2005-03-31 21:08:24.000000000 +0200
+++ linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/arch/ppc64/Kconfig 2005-03-31 23:28:07.000000000 +0200
@@ -297,6 +297,7 @@ config SECCOMP
endmenu
+source "drivers/perfctr/Kconfig"
menu "General setup"
diff -rupN linux-2.6.12-rc1-mm4/arch/ppc64/kernel/misc.S linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/arch/ppc64/kernel/misc.S
--- linux-2.6.12-rc1-mm4/arch/ppc64/kernel/misc.S 2005-03-31 21:08:24.000000000 +0200
+++ linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/arch/ppc64/kernel/misc.S 2005-03-31 23:28:07.000000000 +0200
@@ -956,6 +956,12 @@ _GLOBAL(sys_call_table32)
.llong .sys32_request_key
.llong .compat_sys_keyctl
.llong .compat_sys_waitid
+ .llong .sys_ni_syscall /* 273 reserved for sys_ioprio_set */
+ .llong .sys_ni_syscall /* 274 reserved for sys_ioprio_get */
+ .llong .sys_vperfctr_open /* 275 */
+ .llong .sys_vperfctr_control
+ .llong .sys_vperfctr_write
+ .llong .sys_vperfctr_read
.balign 8
_GLOBAL(sys_call_table)
@@ -1232,3 +1238,9 @@ _GLOBAL(sys_call_table)
.llong .sys_request_key /* 270 */
.llong .sys_keyctl
.llong .sys_waitid
+ .llong .sys_ni_syscall /* 273 reserved for sys_ioprio_set */
+ .llong .sys_ni_syscall /* 274 reserved for sys_ioprio_get */
+ .llong .sys_vperfctr_open /* 275 */
+ .llong .sys_vperfctr_control
+ .llong .sys_vperfctr_write
+ .llong .sys_vperfctr_read
diff -rupN linux-2.6.12-rc1-mm4/arch/ppc64/kernel/process.c linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/arch/ppc64/kernel/process.c
--- linux-2.6.12-rc1-mm4/arch/ppc64/kernel/process.c 2005-03-31 21:07:46.000000000 +0200
+++ linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/arch/ppc64/kernel/process.c 2005-03-31 23:28:07.000000000 +0200
@@ -36,6 +36,7 @@
#include <linux/kallsyms.h>
#include <linux/interrupt.h>
#include <linux/utsname.h>
+#include <linux/perfctr.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
@@ -225,7 +226,9 @@ struct task_struct *__switch_to(struct t
local_irq_save(flags);
+ perfctr_suspend_thread(&prev->thread);
last = _switch(old_thread, new_thread);
+ perfctr_resume_thread(¤t->thread);
local_irq_restore(flags);
@@ -323,6 +326,7 @@ void exit_thread(void)
last_task_used_altivec = NULL;
#endif /* CONFIG_ALTIVEC */
#endif /* CONFIG_SMP */
+ perfctr_exit_thread(¤t->thread);
}
void flush_thread(void)
@@ -425,6 +429,8 @@ copy_thread(int nr, unsigned long clone_
*/
kregs->nip = *((unsigned long *)ret_from_fork);
+ perfctr_copy_task(p, regs);
+
return 0;
}
diff -rupN linux-2.6.12-rc1-mm4/include/asm-ppc64/processor.h linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/include/asm-ppc64/processor.h
--- linux-2.6.12-rc1-mm4/include/asm-ppc64/processor.h 2005-03-31 21:08:31.000000000 +0200
+++ linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/include/asm-ppc64/processor.h 2005-03-31 23:28:07.000000000 +0200
@@ -574,6 +574,8 @@ struct thread_struct {
unsigned long vrsave;
int used_vr; /* set if process has used altivec */
#endif /* CONFIG_ALTIVEC */
+ /* performance counters */
+ struct vperfctr *perfctr;
};
#define ARCH_MIN_TASKALIGN 16
diff -rupN linux-2.6.12-rc1-mm4/include/asm-ppc64/unistd.h linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/include/asm-ppc64/unistd.h
--- linux-2.6.12-rc1-mm4/include/asm-ppc64/unistd.h 2005-03-31 21:07:54.000000000 +0200
+++ linux-2.6.12-rc1-mm4.perfctr27-ppc64-arch-hooks/include/asm-ppc64/unistd.h 2005-03-31 23:28:07.000000000 +0200
@@ -283,8 +283,14 @@
#define __NR_request_key 270
#define __NR_keyctl 271
#define __NR_waitid 272
+/* 273 is reserved for ioprio_set */
+/* 274 is reserved for ioprio_get */
+#define __NR_vperfctr_open 275
+#define __NR_vperfctr_control (__NR_vperfctr_open+1)
+#define __NR_vperfctr_write (__NR_vperfctr_open+2)
+#define __NR_vperfctr_read (__NR_vperfctr_open+3)
-#define __NR_syscalls 273
+#define __NR_syscalls 279
#ifdef __KERNEL__
#define NR_syscalls __NR_syscalls
#endif
-
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