| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 14 Jan 2021 17:05:14 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>,
Robert Richter <rric@...nel.org>,
Richard Henderson <rth@...ddle.net>,
Ivan Kokshaysky <ink@...assic.park.msu.ru>,
Matt Turner <mattst88@...il.com>
Cc: Viresh Kumar <viresh.kumar@...aro.org>,
Vincent Guittot <vincent.guittot@...aro.org>,
Arnd Bergmann <arnd@...nel.org>, oprofile-list@...ts.sf.net,
William Cohen <wcohen@...hat.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
anmar.oueja@...aro.org, Christoph Hellwig <hch@...radead.org>,
linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 01/18] arch: alpha: Remove CONFIG_OPROFILE support
The "oprofile" user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.
Remove the old oprofile's architecture specific support.
Suggested-by: Christoph Hellwig <hch@...radead.org>
Suggested-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
arch/alpha/Kconfig | 1 -
arch/alpha/Makefile | 1 -
arch/alpha/oprofile/Makefile | 20 ---
arch/alpha/oprofile/common.c | 189 --------------------
arch/alpha/oprofile/op_impl.h | 55 ------
arch/alpha/oprofile/op_model_ev4.c | 114 ------------
arch/alpha/oprofile/op_model_ev5.c | 209 ----------------------
arch/alpha/oprofile/op_model_ev6.c | 101 -----------
arch/alpha/oprofile/op_model_ev67.c | 261 ----------------------------
9 files changed, 951 deletions(-)
delete mode 100644 arch/alpha/oprofile/Makefile
delete mode 100644 arch/alpha/oprofile/common.c
delete mode 100644 arch/alpha/oprofile/op_impl.h
delete mode 100644 arch/alpha/oprofile/op_model_ev4.c
delete mode 100644 arch/alpha/oprofile/op_model_ev5.c
delete mode 100644 arch/alpha/oprofile/op_model_ev6.c
delete mode 100644 arch/alpha/oprofile/op_model_ev67.c
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 1f51437d5765..a401c1481a11 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -14,7 +14,6 @@ config ALPHA
select HAVE_AOUT
select HAVE_ASM_MODVERSIONS
select HAVE_IDE
- select HAVE_OPROFILE
select HAVE_PCSPKR_PLATFORM
select HAVE_PERF_EVENTS
select NEED_DMA_MAP_STATE
diff --git a/arch/alpha/Makefile b/arch/alpha/Makefile
index 12dee59b011c..c2946431d88d 100644
--- a/arch/alpha/Makefile
+++ b/arch/alpha/Makefile
@@ -40,7 +40,6 @@ head-y := arch/alpha/kernel/head.o
core-y += arch/alpha/kernel/ arch/alpha/mm/
core-$(CONFIG_MATHEMU) += arch/alpha/math-emu/
-drivers-$(CONFIG_OPROFILE) += arch/alpha/oprofile/
libs-y += arch/alpha/lib/
# export what is needed by arch/alpha/boot/Makefile
diff --git a/arch/alpha/oprofile/Makefile b/arch/alpha/oprofile/Makefile
deleted file mode 100644
index 79f32820a42f..000000000000
--- a/arch/alpha/oprofile/Makefile
+++ /dev/null
@@ -1,20 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-ccflags-y := -Werror -Wno-sign-compare
-
-obj-$(CONFIG_OPROFILE) += oprofile.o
-
-DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
- oprof.o cpu_buffer.o buffer_sync.o \
- event_buffer.o oprofile_files.o \
- oprofilefs.o oprofile_stats.o \
- timer_int.o )
-
-oprofile-y := $(DRIVER_OBJS) common.o
-oprofile-$(CONFIG_ALPHA_GENERIC) += op_model_ev4.o \
- op_model_ev5.o \
- op_model_ev6.o \
- op_model_ev67.o
-oprofile-$(CONFIG_ALPHA_EV4) += op_model_ev4.o
-oprofile-$(CONFIG_ALPHA_EV5) += op_model_ev5.o
-oprofile-$(CONFIG_ALPHA_EV6) += op_model_ev6.o \
- op_model_ev67.o
diff --git a/arch/alpha/oprofile/common.c b/arch/alpha/oprofile/common.c
deleted file mode 100644
index 1b1259c7d7d1..000000000000
--- a/arch/alpha/oprofile/common.c
+++ /dev/null
@@ -1,189 +0,0 @@
-/**
- * @file arch/alpha/oprofile/common.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author Richard Henderson <rth@...ddle.net>
- */
-
-#include <linux/oprofile.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <asm/ptrace.h>
-#include <asm/special_insns.h>
-
-#include "op_impl.h"
-
-extern struct op_axp_model op_model_ev4 __attribute__((weak));
-extern struct op_axp_model op_model_ev5 __attribute__((weak));
-extern struct op_axp_model op_model_pca56 __attribute__((weak));
-extern struct op_axp_model op_model_ev6 __attribute__((weak));
-extern struct op_axp_model op_model_ev67 __attribute__((weak));
-
-static struct op_axp_model *model;
-
-extern void (*perf_irq)(unsigned long, struct pt_regs *);
-static void (*save_perf_irq)(unsigned long, struct pt_regs *);
-
-static struct op_counter_config ctr[20];
-static struct op_system_config sys;
-static struct op_register_config reg;
-
-/* Called from do_entInt to handle the performance monitor interrupt. */
-
-static void
-op_handle_interrupt(unsigned long which, struct pt_regs *regs)
-{
- model->handle_interrupt(which, regs, ctr);
-
- /* If the user has selected an interrupt frequency that is
- not exactly the width of the counter, write a new value
- into the counter such that it'll overflow after N more
- events. */
- if ((reg.need_reset >> which) & 1)
- model->reset_ctr(®, which);
-}
-
-static int
-op_axp_setup(void)
-{
- unsigned long i, e;
-
- /* Install our interrupt handler into the existing hook. */
- save_perf_irq = perf_irq;
- perf_irq = op_handle_interrupt;
-
- /* Compute the mask of enabled counters. */
- for (i = e = 0; i < model->num_counters; ++i)
- if (ctr[i].enabled)
- e |= 1 << i;
- reg.enable = e;
-
- /* Pre-compute the values to stuff in the hardware registers. */
- model->reg_setup(®, ctr, &sys);
-
- /* Configure the registers on all cpus. */
- smp_call_function(model->cpu_setup, ®, 1);
- model->cpu_setup(®);
- return 0;
-}
-
-static void
-op_axp_shutdown(void)
-{
- /* Remove our interrupt handler. We may be removing this module. */
- perf_irq = save_perf_irq;
-}
-
-static void
-op_axp_cpu_start(void *dummy)
-{
- wrperfmon(1, reg.enable);
-}
-
-static int
-op_axp_start(void)
-{
- smp_call_function(op_axp_cpu_start, NULL, 1);
- op_axp_cpu_start(NULL);
- return 0;
-}
-
-static inline void
-op_axp_cpu_stop(void *dummy)
-{
- /* Disable performance monitoring for all counters. */
- wrperfmon(0, -1);
-}
-
-static void
-op_axp_stop(void)
-{
- smp_call_function(op_axp_cpu_stop, NULL, 1);
- op_axp_cpu_stop(NULL);
-}
-
-static int
-op_axp_create_files(struct dentry *root)
-{
- int i;
-
- for (i = 0; i < model->num_counters; ++i) {
- struct dentry *dir;
- char buf[4];
-
- snprintf(buf, sizeof buf, "%d", i);
- dir = oprofilefs_mkdir(root, buf);
-
- oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
- oprofilefs_create_ulong(dir, "event", &ctr[i].event);
- oprofilefs_create_ulong(dir, "count", &ctr[i].count);
- /* Dummies. */
- oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
- oprofilefs_create_ulong(dir, "user", &ctr[i].user);
- oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
- }
-
- if (model->can_set_proc_mode) {
- oprofilefs_create_ulong(root, "enable_pal",
- &sys.enable_pal);
- oprofilefs_create_ulong(root, "enable_kernel",
- &sys.enable_kernel);
- oprofilefs_create_ulong(root, "enable_user",
- &sys.enable_user);
- }
-
- return 0;
-}
-
-int __init
-oprofile_arch_init(struct oprofile_operations *ops)
-{
- struct op_axp_model *lmodel = NULL;
-
- switch (implver()) {
- case IMPLVER_EV4:
- lmodel = &op_model_ev4;
- break;
- case IMPLVER_EV5:
- /* 21164PC has a slightly different set of events.
- Recognize the chip by the presence of the MAX insns. */
- if (!amask(AMASK_MAX))
- lmodel = &op_model_pca56;
- else
- lmodel = &op_model_ev5;
- break;
- case IMPLVER_EV6:
- /* 21264A supports ProfileMe.
- Recognize the chip by the presence of the CIX insns. */
- if (!amask(AMASK_CIX))
- lmodel = &op_model_ev67;
- else
- lmodel = &op_model_ev6;
- break;
- }
-
- if (!lmodel)
- return -ENODEV;
- model = lmodel;
-
- ops->create_files = op_axp_create_files;
- ops->setup = op_axp_setup;
- ops->shutdown = op_axp_shutdown;
- ops->start = op_axp_start;
- ops->stop = op_axp_stop;
- ops->cpu_type = lmodel->cpu_type;
-
- printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
- lmodel->cpu_type);
-
- return 0;
-}
-
-
-void
-oprofile_arch_exit(void)
-{
-}
diff --git a/arch/alpha/oprofile/op_impl.h b/arch/alpha/oprofile/op_impl.h
deleted file mode 100644
index b2b87ae9a353..000000000000
--- a/arch/alpha/oprofile/op_impl.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/**
- * @file arch/alpha/oprofile/op_impl.h
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author Richard Henderson <rth@...ddle.net>
- */
-
-#ifndef OP_IMPL_H
-#define OP_IMPL_H 1
-
-/* Per-counter configuration as set via oprofilefs. */
-struct op_counter_config {
- unsigned long enabled;
- unsigned long event;
- unsigned long count;
- /* Dummies because I am too lazy to hack the userspace tools. */
- unsigned long kernel;
- unsigned long user;
- unsigned long unit_mask;
-};
-
-/* System-wide configuration as set via oprofilefs. */
-struct op_system_config {
- unsigned long enable_pal;
- unsigned long enable_kernel;
- unsigned long enable_user;
-};
-
-/* Cached values for the various performance monitoring registers. */
-struct op_register_config {
- unsigned long enable;
- unsigned long mux_select;
- unsigned long proc_mode;
- unsigned long freq;
- unsigned long reset_values;
- unsigned long need_reset;
-};
-
-/* Per-architecture configuration and hooks. */
-struct op_axp_model {
- void (*reg_setup) (struct op_register_config *,
- struct op_counter_config *,
- struct op_system_config *);
- void (*cpu_setup) (void *);
- void (*reset_ctr) (struct op_register_config *, unsigned long);
- void (*handle_interrupt) (unsigned long, struct pt_regs *,
- struct op_counter_config *);
- char *cpu_type;
- unsigned char num_counters;
- unsigned char can_set_proc_mode;
-};
-
-#endif
diff --git a/arch/alpha/oprofile/op_model_ev4.c b/arch/alpha/oprofile/op_model_ev4.c
deleted file mode 100644
index 086a0d5445c5..000000000000
--- a/arch/alpha/oprofile/op_model_ev4.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/**
- * @file arch/alpha/oprofile/op_model_ev4.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author Richard Henderson <rth@...ddle.net>
- */
-
-#include <linux/oprofile.h>
-#include <linux/smp.h>
-#include <asm/ptrace.h>
-
-#include "op_impl.h"
-
-
-/* Compute all of the registers in preparation for enabling profiling. */
-
-static void
-ev4_reg_setup(struct op_register_config *reg,
- struct op_counter_config *ctr,
- struct op_system_config *sys)
-{
- unsigned long ctl = 0, count, hilo;
-
- /* Select desired events. We've mapped the event numbers
- such that they fit directly into the event selection fields.
-
- Note that there is no "off" setting. In both cases we select
- the EXTERNAL event source, hoping that it'll be the lowest
- frequency, and set the frequency counter to LOW. The interrupts
- for these "disabled" counter overflows are ignored by the
- interrupt handler.
-
- This is most irritating, because the hardware *can* enable and
- disable the interrupts for these counters independently, but the
- wrperfmon interface doesn't allow it. */
-
- ctl |= (ctr[0].enabled ? ctr[0].event << 8 : 14 << 8);
- ctl |= (ctr[1].enabled ? (ctr[1].event - 16) << 32 : 7ul << 32);
-
- /* EV4 can not read or write its counter registers. The only
- thing one can do at all is see if you overflow and get an
- interrupt. We can set the width of the counters, to some
- extent. Take the interrupt count selected by the user,
- map it onto one of the possible values, and write it back. */
-
- count = ctr[0].count;
- if (count <= 4096)
- count = 4096, hilo = 1;
- else
- count = 65536, hilo = 0;
- ctr[0].count = count;
- ctl |= (ctr[0].enabled && hilo) << 3;
-
- count = ctr[1].count;
- if (count <= 256)
- count = 256, hilo = 1;
- else
- count = 4096, hilo = 0;
- ctr[1].count = count;
- ctl |= (ctr[1].enabled && hilo);
-
- reg->mux_select = ctl;
-
- /* Select performance monitoring options. */
- /* ??? Need to come up with some mechanism to trace only
- selected processes. EV4 does not have a mechanism to
- select kernel or user mode only. For now, enable always. */
- reg->proc_mode = 0;
-
- /* Frequency is folded into mux_select for EV4. */
- reg->freq = 0;
-
- /* See above regarding no writes. */
- reg->reset_values = 0;
- reg->need_reset = 0;
-
-}
-
-/* Program all of the registers in preparation for enabling profiling. */
-
-static void
-ev4_cpu_setup(void *x)
-{
- struct op_register_config *reg = x;
-
- wrperfmon(2, reg->mux_select);
- wrperfmon(3, reg->proc_mode);
-}
-
-static void
-ev4_handle_interrupt(unsigned long which, struct pt_regs *regs,
- struct op_counter_config *ctr)
-{
- /* EV4 can't properly disable counters individually.
- Discard "disabled" events now. */
- if (!ctr[which].enabled)
- return;
-
- /* Record the sample. */
- oprofile_add_sample(regs, which);
-}
-
-
-struct op_axp_model op_model_ev4 = {
- .reg_setup = ev4_reg_setup,
- .cpu_setup = ev4_cpu_setup,
- .reset_ctr = NULL,
- .handle_interrupt = ev4_handle_interrupt,
- .cpu_type = "alpha/ev4",
- .num_counters = 2,
- .can_set_proc_mode = 0,
-};
diff --git a/arch/alpha/oprofile/op_model_ev5.c b/arch/alpha/oprofile/op_model_ev5.c
deleted file mode 100644
index c300f5ef3482..000000000000
--- a/arch/alpha/oprofile/op_model_ev5.c
+++ /dev/null
@@ -1,209 +0,0 @@
-/**
- * @file arch/alpha/oprofile/op_model_ev5.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author Richard Henderson <rth@...ddle.net>
- */
-
-#include <linux/oprofile.h>
-#include <linux/smp.h>
-#include <asm/ptrace.h>
-
-#include "op_impl.h"
-
-
-/* Compute all of the registers in preparation for enabling profiling.
-
- The 21164 (EV5) and 21164PC (PCA65) vary in the bit placement and
- meaning of the "CBOX" events. Given that we don't care about meaning
- at this point, arrange for the difference in bit placement to be
- handled by common code. */
-
-static void
-common_reg_setup(struct op_register_config *reg,
- struct op_counter_config *ctr,
- struct op_system_config *sys,
- int cbox1_ofs, int cbox2_ofs)
-{
- int i, ctl, reset, need_reset;
-
- /* Select desired events. The event numbers are selected such
- that they map directly into the event selection fields:
-
- PCSEL0: 0, 1
- PCSEL1: 24-39
- CBOX1: 40-47
- PCSEL2: 48-63
- CBOX2: 64-71
-
- There are two special cases, in that CYCLES can be measured
- on PCSEL[02], and SCACHE_WRITE can be measured on CBOX[12].
- These event numbers are canonicalizes to their first appearance. */
-
- ctl = 0;
- for (i = 0; i < 3; ++i) {
- unsigned long event = ctr[i].event;
- if (!ctr[i].enabled)
- continue;
-
- /* Remap the duplicate events, as described above. */
- if (i == 2) {
- if (event == 0)
- event = 12+48;
- else if (event == 2+41)
- event = 4+65;
- }
-
- /* Convert the event numbers onto mux_select bit mask. */
- if (event < 2)
- ctl |= event << 31;
- else if (event < 24)
- /* error */;
- else if (event < 40)
- ctl |= (event - 24) << 4;
- else if (event < 48)
- ctl |= (event - 40) << cbox1_ofs | 15 << 4;
- else if (event < 64)
- ctl |= event - 48;
- else if (event < 72)
- ctl |= (event - 64) << cbox2_ofs | 15;
- }
- reg->mux_select = ctl;
-
- /* Select processor mode. */
- /* ??? Need to come up with some mechanism to trace only selected
- processes. For now select from pal, kernel and user mode. */
- ctl = 0;
- ctl |= !sys->enable_pal << 9;
- ctl |= !sys->enable_kernel << 8;
- ctl |= !sys->enable_user << 30;
- reg->proc_mode = ctl;
-
- /* Select interrupt frequencies. Take the interrupt count selected
- by the user, and map it onto one of the possible counter widths.
- If the user value is in between, compute a value to which the
- counter is reset at each interrupt. */
-
- ctl = reset = need_reset = 0;
- for (i = 0; i < 3; ++i) {
- unsigned long max, hilo, count = ctr[i].count;
- if (!ctr[i].enabled)
- continue;
-
- if (count <= 256)
- count = 256, hilo = 3, max = 256;
- else {
- max = (i == 2 ? 16384 : 65536);
- hilo = 2;
- if (count > max)
- count = max;
- }
- ctr[i].count = count;
-
- ctl |= hilo << (8 - i*2);
- reset |= (max - count) << (48 - 16*i);
- if (count != max)
- need_reset |= 1 << i;
- }
- reg->freq = ctl;
- reg->reset_values = reset;
- reg->need_reset = need_reset;
-}
-
-static void
-ev5_reg_setup(struct op_register_config *reg,
- struct op_counter_config *ctr,
- struct op_system_config *sys)
-{
- common_reg_setup(reg, ctr, sys, 19, 22);
-}
-
-static void
-pca56_reg_setup(struct op_register_config *reg,
- struct op_counter_config *ctr,
- struct op_system_config *sys)
-{
- common_reg_setup(reg, ctr, sys, 8, 11);
-}
-
-/* Program all of the registers in preparation for enabling profiling. */
-
-static void
-ev5_cpu_setup (void *x)
-{
- struct op_register_config *reg = x;
-
- wrperfmon(2, reg->mux_select);
- wrperfmon(3, reg->proc_mode);
- wrperfmon(4, reg->freq);
- wrperfmon(6, reg->reset_values);
-}
-
-/* CTR is a counter for which the user has requested an interrupt count
- in between one of the widths selectable in hardware. Reset the count
- for CTR to the value stored in REG->RESET_VALUES.
-
- For EV5, this means disabling profiling, reading the current values,
- masking in the value for the desired register, writing, then turning
- profiling back on.
-
- This can be streamlined if profiling is only enabled for user mode.
- In that case we know that the counters are not currently incrementing
- (due to being in kernel mode). */
-
-static void
-ev5_reset_ctr(struct op_register_config *reg, unsigned long ctr)
-{
- unsigned long values, mask, not_pk, reset_values;
-
- mask = (ctr == 0 ? 0xfffful << 48
- : ctr == 1 ? 0xfffful << 32
- : 0x3fff << 16);
-
- not_pk = 1 << 9 | 1 << 8;
-
- reset_values = reg->reset_values;
-
- if ((reg->proc_mode & not_pk) == not_pk) {
- values = wrperfmon(5, 0);
- values = (reset_values & mask) | (values & ~mask & -2);
- wrperfmon(6, values);
- } else {
- wrperfmon(0, -1);
- values = wrperfmon(5, 0);
- values = (reset_values & mask) | (values & ~mask & -2);
- wrperfmon(6, values);
- wrperfmon(1, reg->enable);
- }
-}
-
-static void
-ev5_handle_interrupt(unsigned long which, struct pt_regs *regs,
- struct op_counter_config *ctr)
-{
- /* Record the sample. */
- oprofile_add_sample(regs, which);
-}
-
-
-struct op_axp_model op_model_ev5 = {
- .reg_setup = ev5_reg_setup,
- .cpu_setup = ev5_cpu_setup,
- .reset_ctr = ev5_reset_ctr,
- .handle_interrupt = ev5_handle_interrupt,
- .cpu_type = "alpha/ev5",
- .num_counters = 3,
- .can_set_proc_mode = 1,
-};
-
-struct op_axp_model op_model_pca56 = {
- .reg_setup = pca56_reg_setup,
- .cpu_setup = ev5_cpu_setup,
- .reset_ctr = ev5_reset_ctr,
- .handle_interrupt = ev5_handle_interrupt,
- .cpu_type = "alpha/pca56",
- .num_counters = 3,
- .can_set_proc_mode = 1,
-};
diff --git a/arch/alpha/oprofile/op_model_ev6.c b/arch/alpha/oprofile/op_model_ev6.c
deleted file mode 100644
index 02edf5971614..000000000000
--- a/arch/alpha/oprofile/op_model_ev6.c
+++ /dev/null
@@ -1,101 +0,0 @@
-/**
- * @file arch/alpha/oprofile/op_model_ev6.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author Richard Henderson <rth@...ddle.net>
- */
-
-#include <linux/oprofile.h>
-#include <linux/smp.h>
-#include <asm/ptrace.h>
-
-#include "op_impl.h"
-
-
-/* Compute all of the registers in preparation for enabling profiling. */
-
-static void
-ev6_reg_setup(struct op_register_config *reg,
- struct op_counter_config *ctr,
- struct op_system_config *sys)
-{
- unsigned long ctl, reset, need_reset, i;
-
- /* Select desired events. We've mapped the event numbers
- such that they fit directly into the event selection fields. */
- ctl = 0;
- if (ctr[0].enabled && ctr[0].event)
- ctl |= (ctr[0].event & 1) << 4;
- if (ctr[1].enabled)
- ctl |= (ctr[1].event - 2) & 15;
- reg->mux_select = ctl;
-
- /* Select logging options. */
- /* ??? Need to come up with some mechanism to trace only
- selected processes. EV6 does not have a mechanism to
- select kernel or user mode only. For now, enable always. */
- reg->proc_mode = 0;
-
- /* EV6 cannot change the width of the counters as with the
- other implementations. But fortunately, we can write to
- the counters and set the value such that it will overflow
- at the right time. */
- reset = need_reset = 0;
- for (i = 0; i < 2; ++i) {
- unsigned long count = ctr[i].count;
- if (!ctr[i].enabled)
- continue;
-
- if (count > 0x100000)
- count = 0x100000;
- ctr[i].count = count;
- reset |= (0x100000 - count) << (i ? 6 : 28);
- if (count != 0x100000)
- need_reset |= 1 << i;
- }
- reg->reset_values = reset;
- reg->need_reset = need_reset;
-}
-
-/* Program all of the registers in preparation for enabling profiling. */
-
-static void
-ev6_cpu_setup (void *x)
-{
- struct op_register_config *reg = x;
-
- wrperfmon(2, reg->mux_select);
- wrperfmon(3, reg->proc_mode);
- wrperfmon(6, reg->reset_values | 3);
-}
-
-/* CTR is a counter for which the user has requested an interrupt count
- in between one of the widths selectable in hardware. Reset the count
- for CTR to the value stored in REG->RESET_VALUES. */
-
-static void
-ev6_reset_ctr(struct op_register_config *reg, unsigned long ctr)
-{
- wrperfmon(6, reg->reset_values | (1 << ctr));
-}
-
-static void
-ev6_handle_interrupt(unsigned long which, struct pt_regs *regs,
- struct op_counter_config *ctr)
-{
- /* Record the sample. */
- oprofile_add_sample(regs, which);
-}
-
-
-struct op_axp_model op_model_ev6 = {
- .reg_setup = ev6_reg_setup,
- .cpu_setup = ev6_cpu_setup,
- .reset_ctr = ev6_reset_ctr,
- .handle_interrupt = ev6_handle_interrupt,
- .cpu_type = "alpha/ev6",
- .num_counters = 2,
- .can_set_proc_mode = 0,
-};
diff --git a/arch/alpha/oprofile/op_model_ev67.c b/arch/alpha/oprofile/op_model_ev67.c
deleted file mode 100644
index adb1744d20f3..000000000000
--- a/arch/alpha/oprofile/op_model_ev67.c
+++ /dev/null
@@ -1,261 +0,0 @@
-/**
- * @file arch/alpha/oprofile/op_model_ev67.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author Richard Henderson <rth@...ddle.net>
- * @author Falk Hueffner <falk@...ian.org>
- */
-
-#include <linux/oprofile.h>
-#include <linux/smp.h>
-#include <asm/ptrace.h>
-
-#include "op_impl.h"
-
-
-/* Compute all of the registers in preparation for enabling profiling. */
-
-static void
-ev67_reg_setup(struct op_register_config *reg,
- struct op_counter_config *ctr,
- struct op_system_config *sys)
-{
- unsigned long ctl, reset, need_reset, i;
-
- /* Select desired events. */
- ctl = 1UL << 4; /* Enable ProfileMe mode. */
-
- /* The event numbers are chosen so we can use them directly if
- PCTR1 is enabled. */
- if (ctr[1].enabled) {
- ctl |= (ctr[1].event & 3) << 2;
- } else {
- if (ctr[0].event == 0) /* cycles */
- ctl |= 1UL << 2;
- }
- reg->mux_select = ctl;
-
- /* Select logging options. */
- /* ??? Need to come up with some mechanism to trace only
- selected processes. EV67 does not have a mechanism to
- select kernel or user mode only. For now, enable always. */
- reg->proc_mode = 0;
-
- /* EV67 cannot change the width of the counters as with the
- other implementations. But fortunately, we can write to
- the counters and set the value such that it will overflow
- at the right time. */
- reset = need_reset = 0;
- for (i = 0; i < 2; ++i) {
- unsigned long count = ctr[i].count;
- if (!ctr[i].enabled)
- continue;
-
- if (count > 0x100000)
- count = 0x100000;
- ctr[i].count = count;
- reset |= (0x100000 - count) << (i ? 6 : 28);
- if (count != 0x100000)
- need_reset |= 1 << i;
- }
- reg->reset_values = reset;
- reg->need_reset = need_reset;
-}
-
-/* Program all of the registers in preparation for enabling profiling. */
-
-static void
-ev67_cpu_setup (void *x)
-{
- struct op_register_config *reg = x;
-
- wrperfmon(2, reg->mux_select);
- wrperfmon(3, reg->proc_mode);
- wrperfmon(6, reg->reset_values | 3);
-}
-
-/* CTR is a counter for which the user has requested an interrupt count
- in between one of the widths selectable in hardware. Reset the count
- for CTR to the value stored in REG->RESET_VALUES. */
-
-static void
-ev67_reset_ctr(struct op_register_config *reg, unsigned long ctr)
-{
- wrperfmon(6, reg->reset_values | (1 << ctr));
-}
-
-/* ProfileMe conditions which will show up as counters. We can also
- detect the following, but it seems unlikely that anybody is
- interested in counting them:
- * Reset
- * MT_FPCR (write to floating point control register)
- * Arithmetic trap
- * Dstream Fault
- * Machine Check (ECC fault, etc.)
- * OPCDEC (illegal opcode)
- * Floating point disabled
- * Differentiate between DTB single/double misses and 3 or 4 level
- page tables
- * Istream access violation
- * Interrupt
- * Icache Parity Error.
- * Instruction killed (nop, trapb)
-
- Unfortunately, there seems to be no way to detect Dcache and Bcache
- misses; the latter could be approximated by making the counter
- count Bcache misses, but that is not precise.
-
- We model this as 20 counters:
- * PCTR0
- * PCTR1
- * 9 ProfileMe events, induced by PCTR0
- * 9 ProfileMe events, induced by PCTR1
-*/
-
-enum profileme_counters {
- PM_STALLED, /* Stalled for at least one cycle
- between the fetch and map stages */
- PM_TAKEN, /* Conditional branch taken */
- PM_MISPREDICT, /* Branch caused mispredict trap */
- PM_ITB_MISS, /* ITB miss */
- PM_DTB_MISS, /* DTB miss */
- PM_REPLAY, /* Replay trap */
- PM_LOAD_STORE, /* Load-store order trap */
- PM_ICACHE_MISS, /* Icache miss */
- PM_UNALIGNED, /* Unaligned Load/Store */
- PM_NUM_COUNTERS
-};
-
-static inline void
-op_add_pm(unsigned long pc, int kern, unsigned long counter,
- struct op_counter_config *ctr, unsigned long event)
-{
- unsigned long fake_counter = 2 + event;
- if (counter == 1)
- fake_counter += PM_NUM_COUNTERS;
- if (ctr[fake_counter].enabled)
- oprofile_add_pc(pc, kern, fake_counter);
-}
-
-static void
-ev67_handle_interrupt(unsigned long which, struct pt_regs *regs,
- struct op_counter_config *ctr)
-{
- unsigned long pmpc, pctr_ctl;
- int kern = !user_mode(regs);
- int mispredict = 0;
- union {
- unsigned long v;
- struct {
- unsigned reserved: 30; /* 0-29 */
- unsigned overcount: 3; /* 30-32 */
- unsigned icache_miss: 1; /* 33 */
- unsigned trap_type: 4; /* 34-37 */
- unsigned load_store: 1; /* 38 */
- unsigned trap: 1; /* 39 */
- unsigned mispredict: 1; /* 40 */
- } fields;
- } i_stat;
-
- enum trap_types {
- TRAP_REPLAY,
- TRAP_INVALID0,
- TRAP_DTB_DOUBLE_MISS_3,
- TRAP_DTB_DOUBLE_MISS_4,
- TRAP_FP_DISABLED,
- TRAP_UNALIGNED,
- TRAP_DTB_SINGLE_MISS,
- TRAP_DSTREAM_FAULT,
- TRAP_OPCDEC,
- TRAP_INVALID1,
- TRAP_MACHINE_CHECK,
- TRAP_INVALID2,
- TRAP_ARITHMETIC,
- TRAP_INVALID3,
- TRAP_MT_FPCR,
- TRAP_RESET
- };
-
- pmpc = wrperfmon(9, 0);
- /* ??? Don't know how to handle physical-mode PALcode address. */
- if (pmpc & 1)
- return;
- pmpc &= ~2; /* clear reserved bit */
-
- i_stat.v = wrperfmon(8, 0);
- if (i_stat.fields.trap) {
- switch (i_stat.fields.trap_type) {
- case TRAP_INVALID1:
- case TRAP_INVALID2:
- case TRAP_INVALID3:
- /* Pipeline redirection occurred. PMPC points
- to PALcode. Recognize ITB miss by PALcode
- offset address, and get actual PC from
- EXC_ADDR. */
- oprofile_add_pc(regs->pc, kern, which);
- if ((pmpc & ((1 << 15) - 1)) == 581)
- op_add_pm(regs->pc, kern, which,
- ctr, PM_ITB_MISS);
- /* Most other bit and counter values will be
- those for the first instruction in the
- fault handler, so we're done. */
- return;
- case TRAP_REPLAY:
- op_add_pm(pmpc, kern, which, ctr,
- (i_stat.fields.load_store
- ? PM_LOAD_STORE : PM_REPLAY));
- break;
- case TRAP_DTB_DOUBLE_MISS_3:
- case TRAP_DTB_DOUBLE_MISS_4:
- case TRAP_DTB_SINGLE_MISS:
- op_add_pm(pmpc, kern, which, ctr, PM_DTB_MISS);
- break;
- case TRAP_UNALIGNED:
- op_add_pm(pmpc, kern, which, ctr, PM_UNALIGNED);
- break;
- case TRAP_INVALID0:
- case TRAP_FP_DISABLED:
- case TRAP_DSTREAM_FAULT:
- case TRAP_OPCDEC:
- case TRAP_MACHINE_CHECK:
- case TRAP_ARITHMETIC:
- case TRAP_MT_FPCR:
- case TRAP_RESET:
- break;
- }
-
- /* ??? JSR/JMP/RET/COR or HW_JSR/HW_JMP/HW_RET/HW_COR
- mispredicts do not set this bit but can be
- recognized by the presence of one of these
- instructions at the PMPC location with bit 39
- set. */
- if (i_stat.fields.mispredict) {
- mispredict = 1;
- op_add_pm(pmpc, kern, which, ctr, PM_MISPREDICT);
- }
- }
-
- oprofile_add_pc(pmpc, kern, which);
-
- pctr_ctl = wrperfmon(5, 0);
- if (pctr_ctl & (1UL << 27))
- op_add_pm(pmpc, kern, which, ctr, PM_STALLED);
-
- /* Unfortunately, TAK is undefined on mispredicted branches.
- ??? It is also undefined for non-cbranch insns, should
- check that. */
- if (!mispredict && pctr_ctl & (1UL << 0))
- op_add_pm(pmpc, kern, which, ctr, PM_TAKEN);
-}
-
-struct op_axp_model op_model_ev67 = {
- .reg_setup = ev67_reg_setup,
- .cpu_setup = ev67_cpu_setup,
- .reset_ctr = ev67_reset_ctr,
- .handle_interrupt = ev67_handle_interrupt,
- .cpu_type = "alpha/ev67",
- .num_counters = 20,
- .can_set_proc_mode = 0,
-};
--
2.25.0.rc1.19.g042ed3e048af
Powered by blists - more mailing lists