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ia64: Remove perfmon

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perfmon has been marked broken and thus been disabled for all builds
for more than two years.  Remove it entirely.

Cc: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Enthusiastically-ACKed-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20200911094920.1173631-1-hch@lst.de
This commit is contained in:
Christoph Hellwig 2020-09-11 11:49:19 +02:00 committed by Tony Luck
parent f4d51dffc6
commit ecf5b72d5f
20 changed files with 4 additions and 6998 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/ia64/Kconfig
View File

@ -362,15 +362,6 @@ config ARCH_PROC_KCORE_TEXT
config IA64_MCA_RECOVERY
tristate "MCA recovery from errors other than TLB."
config PERFMON
bool "Performance monitor support"
depends on BROKEN
help
Selects whether support for the IA-64 performance monitor hardware
is included in the kernel. This makes some kernel data-structures a
little bigger and slows down execution a bit, but it is generally
a good idea to turn this on. If you're unsure, say Y.
config IA64_PALINFO
tristate "/proc/pal support"
help

1
arch/ia64/configs/bigsur_defconfig
View File

@ -11,7 +11,6 @@ CONFIG_SMP=y
CONFIG_NR_CPUS=2
CONFIG_PREEMPT=y
# CONFIG_VIRTUAL_MEM_MAP is not set
CONFIG_PERFMON=y
CONFIG_IA64_PALINFO=y
CONFIG_EFI_VARS=y
CONFIG_BINFMT_MISC=m

1
arch/ia64/configs/generic_defconfig
View File

@ -18,7 +18,6 @@ CONFIG_IA64_CYCLONE=y
CONFIG_SMP=y
CONFIG_HOTPLUG_CPU=y
CONFIG_IA64_MCA_RECOVERY=y
CONFIG_PERFMON=y
CONFIG_IA64_PALINFO=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y

1
arch/ia64/configs/gensparse_defconfig
View File

@ -17,7 +17,6 @@ CONFIG_NR_CPUS=512
CONFIG_HOTPLUG_CPU=y
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_IA64_MCA_RECOVERY=y
CONFIG_PERFMON=y
CONFIG_IA64_PALINFO=y
CONFIG_EFI_VARS=y
CONFIG_BINFMT_MISC=m

1
arch/ia64/configs/tiger_defconfig
View File

@ -21,7 +21,6 @@ CONFIG_HOTPLUG_CPU=y
CONFIG_PERMIT_BSP_REMOVE=y
CONFIG_FORCE_CPEI_RETARGET=y
CONFIG_IA64_MCA_RECOVERY=y
CONFIG_PERFMON=y
CONFIG_IA64_PALINFO=y
CONFIG_KEXEC=y
CONFIG_EFI_VARS=y

1
arch/ia64/configs/zx1_defconfig
View File

@ -10,7 +10,6 @@ CONFIG_NR_CPUS=16
CONFIG_HOTPLUG_CPU=y
CONFIG_FLATMEM_MANUAL=y
CONFIG_IA64_MCA_RECOVERY=y
CONFIG_PERFMON=y
CONFIG_IA64_PALINFO=y
CONFIG_CRASH_DUMP=y
CONFIG_EFI_VARS=y

10
arch/ia64/include/asm/processor.h
View File

@ -280,15 +280,6 @@ struct thread_struct {
__u64 map_base; /* base address for get_unmapped_area() */
__u64 rbs_bot; /* the base address for the RBS */
int last_fph_cpu; /* CPU that may hold the contents of f32-f127 */
#ifdef CONFIG_PERFMON
void *pfm_context; /* pointer to detailed PMU context */
unsigned long pfm_needs_checking; /* when >0, pending perfmon work on kernel exit */
# define INIT_THREAD_PM .pfm_context = NULL, \
.pfm_needs_checking = 0UL,
#else
# define INIT_THREAD_PM
#endif
unsigned long dbr[IA64_NUM_DBG_REGS];
unsigned long ibr[IA64_NUM_DBG_REGS];
struct ia64_fpreg fph[96]; /* saved/loaded on demand */
@ -301,7 +292,6 @@ struct thread_struct {
.map_base = DEFAULT_MAP_BASE, \
.rbs_bot = STACK_TOP - DEFAULT_USER_STACK_SIZE, \
.last_fph_cpu = -1, \
INIT_THREAD_PM \
.dbr = {0, }, \
.ibr = {0, }, \
.fph = {{{{0}}}, } \

10
arch/ia64/include/asm/switch_to.h
View File

@ -31,16 +31,8 @@ extern struct task_struct *ia64_switch_to (void *next_task);
extern void ia64_save_extra (struct task_struct *task);
extern void ia64_load_extra (struct task_struct *task);
#ifdef CONFIG_PERFMON
DECLARE_PER_CPU(unsigned long, pfm_syst_info);
# define PERFMON_IS_SYSWIDE() (__this_cpu_read(pfm_syst_info) & 0x1)
#else
# define PERFMON_IS_SYSWIDE() (0)
#endif
#define IA64_HAS_EXTRA_STATE(t) \
((t)->thread.flags & (IA64_THREAD_DBG_VALID|IA64_THREAD_PM_VALID) \
|| PERFMON_IS_SYSWIDE())
((t)->thread.flags & (IA64_THREAD_DBG_VALID|IA64_THREAD_PM_VALID))
#define __switch_to(prev,next,last) do { \
if (IA64_HAS_EXTRA_STATE(prev)) \

3
arch/ia64/kernel/Makefile
View File

@ -10,7 +10,7 @@ endif
extra-y := head.o vmlinux.lds
obj-y := entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o \
irq_lsapic.o ivt.o pal.o patch.o process.o perfmon.o ptrace.o sal.o \
irq_lsapic.o ivt.o pal.o patch.o process.o ptrace.o sal.o \
salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
unwind.o mca.o mca_asm.o topology.o dma-mapping.o iosapic.o acpi.o \
acpi-ext.o
@ -21,7 +21,6 @@ obj-$(CONFIG_IA64_PALINFO) += palinfo.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_SMP) += smp.o smpboot.o
obj-$(CONFIG_NUMA) += numa.o
obj-$(CONFIG_PERFMON) += perfmon_default_smpl.o
obj-$(CONFIG_IA64_CYCLONE) += cyclone.o
obj-$(CONFIG_IA64_MCA_RECOVERY) += mca_recovery.o
obj-$(CONFIG_KPROBES) += kprobes.o

7
arch/ia64/kernel/irq_ia64.c
View File

@ -40,10 +40,6 @@
#include <asm/hw_irq.h>
#include <asm/tlbflush.h>
#ifdef CONFIG_PERFMON
# include <asm/perfmon.h>
#endif
#define IRQ_DEBUG 0
#define IRQ_VECTOR_UNASSIGNED (0)
@ -627,9 +623,6 @@ init_IRQ (void)
"irq_move");
}
#endif
#ifdef CONFIG_PERFMON
pfm_init_percpu();
#endif
}
void

6703
arch/ia64/kernel/perfmon.c
View File

File diff suppressed because it is too large Load Diff

53
arch/ia64/kernel/process.c
View File

@ -51,10 +51,6 @@
#include "entry.h"
#ifdef CONFIG_PERFMON
# include <asm/perfmon.h>
#endif
#include "sigframe.h"
void (*ia64_mark_idle)(int);
@ -174,15 +170,6 @@ do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall)
return;
}
#ifdef CONFIG_PERFMON
if (current->thread.pfm_needs_checking)
/*
* Note: pfm_handle_work() allow us to call it with interrupts
* disabled, and may enable interrupts within the function.
*/
pfm_handle_work();
#endif
/* deal with pending signal delivery */
if (test_thread_flag(TIF_SIGPENDING)) {
local_irq_enable(); /* force interrupt enable */
@ -264,41 +251,15 @@ void arch_cpu_idle(void)
void
ia64_save_extra (struct task_struct *task)
{
#ifdef CONFIG_PERFMON
unsigned long info;
#endif
if ((task->thread.flags & IA64_THREAD_DBG_VALID) != 0)
ia64_save_debug_regs(&task->thread.dbr[0]);
#ifdef CONFIG_PERFMON
if ((task->thread.flags & IA64_THREAD_PM_VALID) != 0)
pfm_save_regs(task);
info = __this_cpu_read(pfm_syst_info);
if (info & PFM_CPUINFO_SYST_WIDE)
pfm_syst_wide_update_task(task, info, 0);
#endif
}
void
ia64_load_extra (struct task_struct *task)
{
#ifdef CONFIG_PERFMON
unsigned long info;
#endif
if ((task->thread.flags & IA64_THREAD_DBG_VALID) != 0)
ia64_load_debug_regs(&task->thread.dbr[0]);
#ifdef CONFIG_PERFMON
if ((task->thread.flags & IA64_THREAD_PM_VALID) != 0)
pfm_load_regs(task);
info = __this_cpu_read(pfm_syst_info);
if (info & PFM_CPUINFO_SYST_WIDE)
pfm_syst_wide_update_task(task, info, 1);
#endif
}
/*
@ -432,11 +393,6 @@ copy_thread(unsigned long clone_flags, unsigned long user_stack_base,
*/
child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
& ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
#ifdef CONFIG_PERFMON
if (current->thread.pfm_context)
pfm_inherit(p, child_ptregs);
#endif
return retval;
}
@ -563,15 +519,6 @@ exit_thread (struct task_struct *tsk)
{
ia64_drop_fpu(tsk);
#ifdef CONFIG_PERFMON
/* if needed, stop monitoring and flush state to perfmon context */
if (tsk->thread.pfm_context)
pfm_exit_thread(tsk);
/* free debug register resources */
if (tsk->thread.flags & IA64_THREAD_DBG_VALID)
pfm_release_debug_registers(tsk);
#endif
}
unsigned long

24
arch/ia64/kernel/ptrace.c
View File

@ -30,9 +30,6 @@
#include <asm/rse.h>
#include <linux/uaccess.h>
#include <asm/unwind.h>
#ifdef CONFIG_PERFMON
#include <asm/perfmon.h>
#endif
#include "entry.h"
@ -1951,27 +1948,6 @@ access_uarea(struct task_struct *child, unsigned long addr,
"address 0x%lx\n", addr);
return -1;
}
#ifdef CONFIG_PERFMON
/*
* Check if debug registers are used by perfmon. This
* test must be done once we know that we can do the
* operation, i.e. the arguments are all valid, but
* before we start modifying the state.
*
* Perfmon needs to keep a count of how many processes
* are trying to modify the debug registers for system
* wide monitoring sessions.
*
* We also include read access here, because they may
* cause the PMU-installed debug register state
* (dbr[], ibr[]) to be reset. The two arrays are also
* used by perfmon, but we do not use
* IA64_THREAD_DBG_VALID. The registers are restored
* by the PMU context switch code.
*/
if (pfm_use_debug_registers(child))
return -1;
#endif
if (!(child->thread.flags & IA64_THREAD_DBG_VALID)) {
child->thread.flags |= IA64_THREAD_DBG_VALID;

8
arch/ia64/kernel/smpboot.c
View File

@ -355,10 +355,6 @@ smp_callin (void)
extern void ia64_init_itm(void);
extern volatile int time_keeper_id;
#ifdef CONFIG_PERFMON
extern void pfm_init_percpu(void);
#endif
cpuid = smp_processor_id();
phys_id = hard_smp_processor_id();
itc_master = time_keeper_id;
@ -389,10 +385,6 @@ smp_callin (void)
ia64_mca_cmc_vector_setup(); /* Setup vector on AP */
#ifdef CONFIG_PERFMON
pfm_init_percpu();
#endif
local_irq_enable();
if (!(sal_platform_features & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)) {

2
arch/ia64/kernel/syscalls/syscall.tbl
View File

@ -160,7 +160,7 @@
148 common mmap2 sys_mmap2
149 common pciconfig_read sys_pciconfig_read
150 common pciconfig_write sys_pciconfig_write
151 common perfmonctl sys_perfmonctl
151 common perfmonctl sys_ni_syscall
152 common sigaltstack sys_sigaltstack
153 common rt_sigaction sys_rt_sigaction
154 common rt_sigpending sys_rt_sigpending

1
arch/ia64/lib/Makefile
View File

@ -12,7 +12,6 @@ lib-y := io.o __divsi3.o __udivsi3.o __modsi3.o __umodsi3.o \
lib-$(CONFIG_ITANIUM) += copy_page.o copy_user.o memcpy.o
lib-$(CONFIG_MCKINLEY) += copy_page_mck.o memcpy_mck.o
lib-$(CONFIG_PERFMON) += carta_random.o
AFLAGS___divdi3.o =
AFLAGS___udivdi3.o = -DUNSIGNED

55
arch/ia64/lib/carta_random.S
View File

@ -1,55 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Fast, simple, yet decent quality random number generator based on
* a paper by David G. Carta ("Two Fast Implementations of the
* `Minimal Standard' Random Number Generator," Communications of the
* ACM, January, 1990).
*
* Copyright (C) 2002 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#include <asm/asmmacro.h>
#define a r2
#define m r3
#define lo r8
#define hi r9
#define t0 r16
#define t1 r17
#define seed r32
GLOBAL_ENTRY(carta_random32)
movl a = (16807 << 16) | 16807
;;
pmpyshr2.u t0 = a, seed, 0
pmpyshr2.u t1 = a, seed, 16
;;
unpack2.l t0 = t1, t0
dep m = -1, r0, 0, 31
;;
zxt4 lo = t0
shr.u hi = t0, 32
;;
dep t0 = 0, hi, 15, 49 // t0 = (hi & 0x7fff)
;;
shl t0 = t0, 16 // t0 = (hi & 0x7fff) << 16
shr t1 = hi, 15 // t1 = (hi >> 15)
;;
add lo = lo, t0
;;
cmp.gtu p6, p0 = lo, m
;;
(p6) and lo = lo, m
;;
(p6) add lo = 1, lo
;;
add lo = lo, t1
;;
cmp.gtu p6, p0 = lo, m
;;
(p6) and lo = lo, m
;;
(p6) add lo = 1, lo
br.ret.sptk.many rp
END(carta_random32)

1
arch/ia64/oprofile/Makefile
View File

@ -8,4 +8,3 @@ DRIVER_OBJS := $(addprefix ../../../drivers/oprofile/, \
timer_int.o )
oprofile-y := $(DRIVER_OBJS) init.o backtrace.o
oprofile-$(CONFIG_PERFMON) += perfmon.o

12
arch/ia64/oprofile/init.c
View File

@ -18,21 +18,11 @@ extern void ia64_backtrace(struct pt_regs * const regs, unsigned int depth);
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
int ret = -ENODEV;
#ifdef CONFIG_PERFMON
/* perfmon_init() can fail, but we have no way to report it */
ret = perfmon_init(ops);
#endif
ops->backtrace = ia64_backtrace;
return ret;
return -ENODEV;
}
void oprofile_arch_exit(void)
{
#ifdef CONFIG_PERFMON
perfmon_exit();
#endif
}

99
arch/ia64/oprofile/perfmon.c
View File

@ -1,99 +0,0 @@
/**
* @file perfmon.c
*
* @remark Copyright 2003 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon <levon@movementarian.org>
*/
#include <linux/kernel.h>
#include <linux/oprofile.h>
#include <linux/sched.h>
#include <asm/perfmon.h>
#include <asm/ptrace.h>
#include <asm/errno.h>
static int allow_ints;
static int
perfmon_handler(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg,
struct pt_regs *regs, unsigned long stamp)
{
int event = arg->pmd_eventid;
arg->ovfl_ctrl.bits.reset_ovfl_pmds = 1;
/* the owner of the oprofile event buffer may have exited
* without perfmon being shutdown (e.g. SIGSEGV)
*/
if (allow_ints)
oprofile_add_sample(regs, event);
return 0;
}
static int perfmon_start(void)
{
allow_ints = 1;
return 0;
}
static void perfmon_stop(void)
{
allow_ints = 0;
}
#define OPROFILE_FMT_UUID { \
0x77, 0x7a, 0x6e, 0x61, 0x20, 0x65, 0x73, 0x69, 0x74, 0x6e, 0x72, 0x20, 0x61, 0x65, 0x0a, 0x6c }
static pfm_buffer_fmt_t oprofile_fmt = {
.fmt_name = "oprofile_format",
.fmt_uuid = OPROFILE_FMT_UUID,
.fmt_handler = perfmon_handler,
};
static char *get_cpu_type(void)
{
__u8 family = local_cpu_data->family;
switch (family) {
case 0x07:
return "ia64/itanium";
case 0x1f:
return "ia64/itanium2";
default:
return "ia64/ia64";
}
}
/* all the ops are handled via userspace for IA64 perfmon */
static int using_perfmon;
int perfmon_init(struct oprofile_operations *ops)
{
int ret = pfm_register_buffer_fmt(&oprofile_fmt);
if (ret)
return -ENODEV;
ops->cpu_type = get_cpu_type();
ops->start = perfmon_start;
ops->stop = perfmon_stop;
using_perfmon = 1;
printk(KERN_INFO "oprofile: using perfmon.\n");
return 0;
}
void perfmon_exit(void)
{
if (!using_perfmon)
return;
pfm_unregister_buffer_fmt(oprofile_fmt.fmt_uuid);
}