Commit 57ed609d authored by Linus Torvalds's avatar Linus Torvalds
parents a74d70b6 f133ecca
......@@ -11,6 +11,7 @@ config TILE
select GENERIC_IRQ_PROBE
select GENERIC_PENDING_IRQ if SMP
select GENERIC_IRQ_SHOW
select SYS_HYPERVISOR
# FIXME: investigate whether we need/want these options.
# select HAVE_IOREMAP_PROT
......
......@@ -40,6 +40,10 @@
#define HARDWALL_DEACTIVATE \
_IO(HARDWALL_IOCTL_BASE, _HARDWALL_DEACTIVATE)
#define _HARDWALL_GET_ID 4
#define HARDWALL_GET_ID \
_IO(HARDWALL_IOCTL_BASE, _HARDWALL_GET_ID)
#ifndef __KERNEL__
/* This is the canonical name expected by userspace. */
......@@ -47,9 +51,14 @@
#else
/* Hook for /proc/tile/hardwall. */
struct seq_file;
int proc_tile_hardwall_show(struct seq_file *sf, void *v);
/* /proc hooks for hardwall. */
struct proc_dir_entry;
#ifdef CONFIG_HARDWALL
void proc_tile_hardwall_init(struct proc_dir_entry *root);
int proc_pid_hardwall(struct task_struct *task, char *buffer);
#else
static inline void proc_tile_hardwall_init(struct proc_dir_entry *root) {}
#endif
#endif
......
......@@ -5,7 +5,7 @@
extra-y := vmlinux.lds head_$(BITS).o
obj-y := backtrace.o entry.o init_task.o irq.o messaging.o \
pci-dma.o proc.o process.o ptrace.o reboot.o \
setup.o signal.o single_step.o stack.o sys.o time.o traps.o \
setup.o signal.o single_step.o stack.o sys.o sysfs.o time.o traps.o \
intvec_$(BITS).o regs_$(BITS).o tile-desc_$(BITS).o
obj-$(CONFIG_HARDWALL) += hardwall.o
......
......@@ -40,16 +40,25 @@
struct hardwall_info {
struct list_head list; /* "rectangles" list */
struct list_head task_head; /* head of tasks in this hardwall */
struct cpumask cpumask; /* cpus in the rectangle */
int ulhc_x; /* upper left hand corner x coord */
int ulhc_y; /* upper left hand corner y coord */
int width; /* rectangle width */
int height; /* rectangle height */
int id; /* integer id for this hardwall */
int teardown_in_progress; /* are we tearing this one down? */
};
/* Currently allocated hardwall rectangles */
static LIST_HEAD(rectangles);
/* /proc/tile/hardwall */
static struct proc_dir_entry *hardwall_proc_dir;
/* Functions to manage files in /proc/tile/hardwall. */
static void hardwall_add_proc(struct hardwall_info *rect);
static void hardwall_remove_proc(struct hardwall_info *rect);
/*
* Guard changes to the hardwall data structures.
* This could be finer grained (e.g. one lock for the list of hardwall
......@@ -105,6 +114,8 @@ static int setup_rectangle(struct hardwall_info *r, struct cpumask *mask)
r->ulhc_y = cpu_y(ulhc);
r->width = cpu_x(lrhc) - r->ulhc_x + 1;
r->height = cpu_y(lrhc) - r->ulhc_y + 1;
cpumask_copy(&r->cpumask, mask);
r->id = ulhc; /* The ulhc cpu id can be the hardwall id. */
/* Width and height must be positive */
if (r->width <= 0 || r->height <= 0)
......@@ -388,6 +399,9 @@ static struct hardwall_info *hardwall_create(
/* Set up appropriate hardwalling on all affected cpus. */
hardwall_setup(rect);
/* Create a /proc/tile/hardwall entry. */
hardwall_add_proc(rect);
return rect;
}
......@@ -645,6 +659,9 @@ static void hardwall_destroy(struct hardwall_info *rect)
/* Restart switch and disable firewall. */
on_each_cpu_mask(&mask, restart_udn_switch, NULL, 1);
/* Remove the /proc/tile/hardwall entry. */
hardwall_remove_proc(rect);
/* Now free the rectangle from the list. */
spin_lock_irqsave(&hardwall_lock, flags);
BUG_ON(!list_empty(&rect->task_head));
......@@ -654,35 +671,57 @@ static void hardwall_destroy(struct hardwall_info *rect)
}
/*
* Dump hardwall state via /proc; initialized in arch/tile/sys/proc.c.
*/
int proc_tile_hardwall_show(struct seq_file *sf, void *v)
static int hardwall_proc_show(struct seq_file *sf, void *v)
{
struct hardwall_info *r;
struct hardwall_info *rect = sf->private;
char buf[256];
if (udn_disabled) {
seq_printf(sf, "%dx%d 0,0 pids:\n", smp_width, smp_height);
return 0;
}
spin_lock_irq(&hardwall_lock);
list_for_each_entry(r, &rectangles, list) {
struct task_struct *p;
seq_printf(sf, "%dx%d %d,%d pids:",
r->width, r->height, r->ulhc_x, r->ulhc_y);
list_for_each_entry(p, &r->task_head, thread.hardwall_list) {
unsigned int cpu = cpumask_first(&p->cpus_allowed);
unsigned int x = cpu % smp_width;
unsigned int y = cpu / smp_width;
seq_printf(sf, " %d@%d,%d", p->pid, x, y);
}
seq_printf(sf, "\n");
}
spin_unlock_irq(&hardwall_lock);
int rc = cpulist_scnprintf(buf, sizeof(buf), &rect->cpumask);
buf[rc++] = '\n';
seq_write(sf, buf, rc);
return 0;
}
static int hardwall_proc_open(struct inode *inode,
struct file *file)
{
return single_open(file, hardwall_proc_show, PDE(inode)->data);
}
static const struct file_operations hardwall_proc_fops = {
.open = hardwall_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void hardwall_add_proc(struct hardwall_info *rect)
{
char buf[64];
snprintf(buf, sizeof(buf), "%d", rect->id);
proc_create_data(buf, 0444, hardwall_proc_dir,
&hardwall_proc_fops, rect);
}
static void hardwall_remove_proc(struct hardwall_info *rect)
{
char buf[64];
snprintf(buf, sizeof(buf), "%d", rect->id);
remove_proc_entry(buf, hardwall_proc_dir);
}
int proc_pid_hardwall(struct task_struct *task, char *buffer)
{
struct hardwall_info *rect = task->thread.hardwall;
return rect ? sprintf(buffer, "%d\n", rect->id) : 0;
}
void proc_tile_hardwall_init(struct proc_dir_entry *root)
{
if (!udn_disabled)
hardwall_proc_dir = proc_mkdir("hardwall", root);
}
/*
* Character device support via ioctl/close.
......@@ -716,6 +755,9 @@ static long hardwall_ioctl(struct file *file, unsigned int a, unsigned long b)
return -EINVAL;
return hardwall_deactivate(current);
case _HARDWALL_GET_ID:
return rect ? rect->id : -EINVAL;
default:
return -EINVAL;
}
......
......@@ -27,6 +27,7 @@
#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/homecache.h>
#include <asm/hardwall.h>
#include <arch/chip.h>
......@@ -88,3 +89,75 @@ const struct seq_operations cpuinfo_op = {
.stop = c_stop,
.show = show_cpuinfo,
};
/*
* Support /proc/tile directory
*/
static int __init proc_tile_init(void)
{
struct proc_dir_entry *root = proc_mkdir("tile", NULL);
if (root == NULL)
return 0;
proc_tile_hardwall_init(root);
return 0;
}
arch_initcall(proc_tile_init);
/*
* Support /proc/sys/tile directory
*/
#ifndef __tilegx__ /* FIXME: GX: no support for unaligned access yet */
static ctl_table unaligned_subtable[] = {
{
.procname = "enabled",
.data = &unaligned_fixup,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.procname = "printk",
.data = &unaligned_printk,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.procname = "count",
.data = &unaligned_fixup_count,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{}
};
static ctl_table unaligned_table[] = {
{
.procname = "unaligned_fixup",
.mode = 0555,
.child = unaligned_subtable
},
{}
};
#endif
static struct ctl_path tile_path[] = {
{ .procname = "tile" },
{ }
};
static int __init proc_sys_tile_init(void)
{
#ifndef __tilegx__ /* FIXME: GX: no support for unaligned access yet */
register_sysctl_paths(tile_path, unaligned_table);
#endif
return 0;
}
arch_initcall(proc_sys_tile_init);
/*
* Copyright 2011 Tilera Corporation. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*
* /sys entry support.
*/
#include <linux/sysdev.h>
#include <linux/cpu.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <hv/hypervisor.h>
/* Return a string queried from the hypervisor, truncated to page size. */
static ssize_t get_hv_confstr(char *page, int query)
{
ssize_t n = hv_confstr(query, (unsigned long)page, PAGE_SIZE - 1);
n = n < 0 ? 0 : min(n, (ssize_t)PAGE_SIZE - 1) - 1;
if (n)
page[n++] = '\n';
page[n] = '\0';
return n;
}
static ssize_t chip_width_show(struct sysdev_class *dev,
struct sysdev_class_attribute *attr,
char *page)
{
return sprintf(page, "%u\n", smp_width);
}
static SYSDEV_CLASS_ATTR(chip_width, 0444, chip_width_show, NULL);
static ssize_t chip_height_show(struct sysdev_class *dev,
struct sysdev_class_attribute *attr,
char *page)
{
return sprintf(page, "%u\n", smp_height);
}
static SYSDEV_CLASS_ATTR(chip_height, 0444, chip_height_show, NULL);
static ssize_t chip_serial_show(struct sysdev_class *dev,
struct sysdev_class_attribute *attr,
char *page)
{
return get_hv_confstr(page, HV_CONFSTR_CHIP_SERIAL_NUM);
}
static SYSDEV_CLASS_ATTR(chip_serial, 0444, chip_serial_show, NULL);
static ssize_t chip_revision_show(struct sysdev_class *dev,
struct sysdev_class_attribute *attr,
char *page)
{
return get_hv_confstr(page, HV_CONFSTR_CHIP_REV);
}
static SYSDEV_CLASS_ATTR(chip_revision, 0444, chip_revision_show, NULL);
static ssize_t type_show(struct sysdev_class *dev,
struct sysdev_class_attribute *attr,
char *page)
{
return sprintf(page, "tilera\n");
}
static SYSDEV_CLASS_ATTR(type, 0444, type_show, NULL);
#define HV_CONF_ATTR(name, conf) \
static ssize_t name ## _show(struct sysdev_class *dev, \
struct sysdev_class_attribute *attr, \
char *page) \
{ \
return get_hv_confstr(page, conf); \
} \
static SYSDEV_CLASS_ATTR(name, 0444, name ## _show, NULL);
HV_CONF_ATTR(version, HV_CONFSTR_HV_SW_VER)
HV_CONF_ATTR(config_version, HV_CONFSTR_HV_CONFIG_VER)
HV_CONF_ATTR(board_part, HV_CONFSTR_BOARD_PART_NUM)
HV_CONF_ATTR(board_serial, HV_CONFSTR_BOARD_SERIAL_NUM)
HV_CONF_ATTR(board_revision, HV_CONFSTR_BOARD_REV)
HV_CONF_ATTR(board_description, HV_CONFSTR_BOARD_DESC)
HV_CONF_ATTR(mezz_part, HV_CONFSTR_MEZZ_PART_NUM)
HV_CONF_ATTR(mezz_serial, HV_CONFSTR_MEZZ_SERIAL_NUM)
HV_CONF_ATTR(mezz_revision, HV_CONFSTR_MEZZ_REV)
HV_CONF_ATTR(mezz_description, HV_CONFSTR_MEZZ_DESC)
HV_CONF_ATTR(switch_control, HV_CONFSTR_SWITCH_CONTROL)
static struct attribute *board_attrs[] = {
&attr_board_part.attr,
&attr_board_serial.attr,
&attr_board_revision.attr,
&attr_board_description.attr,
&attr_mezz_part.attr,
&attr_mezz_serial.attr,
&attr_mezz_revision.attr,
&attr_mezz_description.attr,
&attr_switch_control.attr,
NULL
};
static struct attribute_group board_attr_group = {
.name = "board",
.attrs = board_attrs,
};
static struct bin_attribute hvconfig_bin;
static ssize_t
hvconfig_bin_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
static size_t size;
/* Lazily learn the true size (minus the trailing NUL). */
if (size == 0)
size = hv_confstr(HV_CONFSTR_HV_CONFIG, 0, 0) - 1;
/* Check and adjust input parameters. */
if (off > size)
return -EINVAL;
if (count > size - off)
count = size - off;
if (count) {
/* Get a copy of the hvc and copy out the relevant portion. */
char *hvc;
size = off + count;
hvc = kmalloc(size, GFP_KERNEL);
if (hvc == NULL)
return -ENOMEM;
hv_confstr(HV_CONFSTR_HV_CONFIG, (unsigned long)hvc, size);
memcpy(buf, hvc + off, count);
kfree(hvc);
}
return count;
}
static int __init create_sysfs_entries(void)
{
struct sysdev_class *cls = &cpu_sysdev_class;
int err = 0;
#define create_cpu_attr(name) \
if (!err) \
err = sysfs_create_file(&cls->kset.kobj, &attr_##name.attr);
create_cpu_attr(chip_width);
create_cpu_attr(chip_height);
create_cpu_attr(chip_serial);
create_cpu_attr(chip_revision);
#define create_hv_attr(name) \
if (!err) \
err = sysfs_create_file(hypervisor_kobj, &attr_##name.attr);
create_hv_attr(type);
create_hv_attr(version);
create_hv_attr(config_version);
if (!err)
err = sysfs_create_group(hypervisor_kobj, &board_attr_group);
if (!err) {
sysfs_bin_attr_init(&hvconfig_bin);
hvconfig_bin.attr.name = "hvconfig";
hvconfig_bin.attr.mode = S_IRUGO;
hvconfig_bin.read = hvconfig_bin_read;
hvconfig_bin.size = PAGE_SIZE;
err = sysfs_create_bin_file(hypervisor_kobj, &hvconfig_bin);
}
return err;
}
subsys_initcall(create_sysfs_entries);
......@@ -83,6 +83,9 @@
#include <linux/pid_namespace.h>
#include <linux/fs_struct.h>
#include <linux/slab.h>
#ifdef CONFIG_HARDWALL
#include <asm/hardwall.h>
#endif
#include "internal.h"
/* NOTE:
......@@ -2842,6 +2845,9 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_TASK_IO_ACCOUNTING
INF("io", S_IRUGO, proc_tgid_io_accounting),
#endif
#ifdef CONFIG_HARDWALL
INF("hardwall", S_IRUGO, proc_pid_hardwall),
#endif
};
static int proc_tgid_base_readdir(struct file * filp,
......@@ -3181,6 +3187,9 @@ static const struct pid_entry tid_base_stuff[] = {
#ifdef CONFIG_TASK_IO_ACCOUNTING
INF("io", S_IRUGO, proc_tid_io_accounting),
#endif
#ifdef CONFIG_HARDWALL
INF("hardwall", S_IRUGO, proc_pid_hardwall),
#endif
};
static int proc_tid_base_readdir(struct file * filp,
......
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