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Diffstat (limited to 'arch/ia64/kernel/perfmon.c')
-rw-r--r--arch/ia64/kernel/perfmon.c203
1 files changed, 80 insertions, 123 deletions
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 6bcbe215b9a..5845ffea67c 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -41,6 +41,8 @@
#include <linux/rcupdate.h>
#include <linux/completion.h>
#include <linux/tracehook.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
#include <asm/errno.h>
#include <asm/intrinsics.h>
@@ -48,7 +50,6 @@
#include <asm/perfmon.h>
#include <asm/processor.h>
#include <asm/signal.h>
-#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
@@ -520,7 +521,7 @@ static pmu_config_t *pmu_conf;
pfm_sysctl_t pfm_sysctl;
EXPORT_SYMBOL(pfm_sysctl);
-static ctl_table pfm_ctl_table[]={
+static struct ctl_table pfm_ctl_table[] = {
{
.procname = "debug",
.data = &pfm_sysctl.debug,
@@ -551,7 +552,7 @@ static ctl_table pfm_ctl_table[]={
},
{}
};
-static ctl_table pfm_sysctl_dir[] = {
+static struct ctl_table pfm_sysctl_dir[] = {
{
.procname = "perfmon",
.mode = 0555,
@@ -559,7 +560,7 @@ static ctl_table pfm_sysctl_dir[] = {
},
{}
};
-static ctl_table pfm_sysctl_root[] = {
+static struct ctl_table pfm_sysctl_root[] = {
{
.procname = "kernel",
.mode = 0555,
@@ -604,31 +605,22 @@ pfm_unprotect_ctx_ctxsw(pfm_context_t *x, unsigned long f)
spin_unlock(&(x)->ctx_lock);
}
-static inline unsigned int
-pfm_do_munmap(struct mm_struct *mm, unsigned long addr, size_t len, int acct)
-{
- return do_munmap(mm, addr, len);
-}
-
-static inline unsigned long
-pfm_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags, unsigned long exec)
-{
- return get_unmapped_area(file, addr, len, pgoff, flags);
-}
-
+/* forward declaration */
+static const struct dentry_operations pfmfs_dentry_operations;
-static int
-pfmfs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data,
- struct vfsmount *mnt)
+static struct dentry *
+pfmfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data)
{
- return get_sb_pseudo(fs_type, "pfm:", NULL, PFMFS_MAGIC, mnt);
+ return mount_pseudo(fs_type, "pfm:", NULL, &pfmfs_dentry_operations,
+ PFMFS_MAGIC);
}
static struct file_system_type pfm_fs_type = {
.name = "pfmfs",
- .get_sb = pfmfs_get_sb,
+ .mount = pfmfs_mount,
.kill_sb = kill_anon_super,
};
+MODULE_ALIAS_FS("pfmfs");
DEFINE_PER_CPU(unsigned long, pfm_syst_info);
DEFINE_PER_CPU(struct task_struct *, pmu_owner);
@@ -829,10 +821,9 @@ pfm_rvmalloc(unsigned long size)
unsigned long addr;
size = PAGE_ALIGN(size);
- mem = vmalloc(size);
+ mem = vzalloc(size);
if (mem) {
//printk("perfmon: CPU%d pfm_rvmalloc(%ld)=%p\n", smp_processor_id(), size, mem);
- memset(mem, 0, size);
addr = (unsigned long)mem;
while (size > 0) {
pfm_reserve_page(addr);
@@ -1332,8 +1323,6 @@ out:
}
EXPORT_SYMBOL(pfm_unregister_buffer_fmt);
-extern void update_pal_halt_status(int);
-
static int
pfm_reserve_session(struct task_struct *task, int is_syswide, unsigned int cpu)
{
@@ -1381,9 +1370,9 @@ pfm_reserve_session(struct task_struct *task, int is_syswide, unsigned int cpu)
cpu));
/*
- * disable default_idle() to go to PAL_HALT
+ * Force idle() into poll mode
*/
- update_pal_halt_status(0);
+ cpu_idle_poll_ctrl(true);
UNLOCK_PFS(flags);
@@ -1440,11 +1429,8 @@ pfm_unreserve_session(pfm_context_t *ctx, int is_syswide, unsigned int cpu)
is_syswide,
cpu));
- /*
- * if possible, enable default_idle() to go into PAL_HALT
- */
- if (pfm_sessions.pfs_task_sessions == 0 && pfm_sessions.pfs_sys_sessions == 0)
- update_pal_halt_status(1);
+ /* Undo forced polling. Last session reenables pal_halt */
+ cpu_idle_poll_ctrl(false);
UNLOCK_PFS(flags);
@@ -1457,8 +1443,9 @@ pfm_unreserve_session(pfm_context_t *ctx, int is_syswide, unsigned int cpu)
* a PROTECT_CTX() section.
*/
static int
-pfm_remove_smpl_mapping(struct task_struct *task, void *vaddr, unsigned long size)
+pfm_remove_smpl_mapping(void *vaddr, unsigned long size)
{
+ struct task_struct *task = current;
int r;
/* sanity checks */
@@ -1472,13 +1459,8 @@ pfm_remove_smpl_mapping(struct task_struct *task, void *vaddr, unsigned long siz
/*
* does the actual unmapping
*/
- down_write(&task->mm->mmap_sem);
-
- DPRINT(("down_write done smpl_vaddr=%p size=%lu\n", vaddr, size));
+ r = vm_munmap((unsigned long)vaddr, size);
- r = pfm_do_munmap(task->mm, (unsigned long)vaddr, size, 0);
-
- up_write(&task->mm->mmap_sem);
if (r !=0) {
printk(KERN_ERR "perfmon: [%d] unable to unmap sampling buffer @%p size=%lu\n", task_pid_nr(task), vaddr, size);
}
@@ -1542,7 +1524,7 @@ pfm_exit_smpl_buffer(pfm_buffer_fmt_t *fmt)
* any operations on the root directory. However, we need a non-trivial
* d_name - pfm: will go nicely and kill the special-casing in procfs.
*/
-static struct vfsmount *pfmfs_mnt;
+static struct vfsmount *pfmfs_mnt __read_mostly;
static int __init
init_pfm_fs(void)
@@ -1572,7 +1554,7 @@ pfm_read(struct file *filp, char __user *buf, size_t size, loff_t *ppos)
return -EINVAL;
}
- ctx = (pfm_context_t *)filp->private_data;
+ ctx = filp->private_data;
if (ctx == NULL) {
printk(KERN_ERR "perfmon: pfm_read: NULL ctx [%d]\n", task_pid_nr(current));
return -EINVAL;
@@ -1672,7 +1654,7 @@ pfm_poll(struct file *filp, poll_table * wait)
return 0;
}
- ctx = (pfm_context_t *)filp->private_data;
+ ctx = filp->private_data;
if (ctx == NULL) {
printk(KERN_ERR "perfmon: pfm_poll: NULL ctx [%d]\n", task_pid_nr(current));
return 0;
@@ -1695,8 +1677,8 @@ pfm_poll(struct file *filp, poll_table * wait)
return mask;
}
-static int
-pfm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long
+pfm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
DPRINT(("pfm_ioctl called\n"));
return -EINVAL;
@@ -1732,7 +1714,7 @@ pfm_fasync(int fd, struct file *filp, int on)
return -EBADF;
}
- ctx = (pfm_context_t *)filp->private_data;
+ ctx = filp->private_data;
if (ctx == NULL) {
printk(KERN_ERR "perfmon: pfm_fasync NULL ctx [%d]\n", task_pid_nr(current));
return -EBADF;
@@ -1840,7 +1822,7 @@ pfm_flush(struct file *filp, fl_owner_t id)
return -EBADF;
}
- ctx = (pfm_context_t *)filp->private_data;
+ ctx = filp->private_data;
if (ctx == NULL) {
printk(KERN_ERR "perfmon: pfm_flush: NULL ctx [%d]\n", task_pid_nr(current));
return -EBADF;
@@ -1944,7 +1926,7 @@ pfm_flush(struct file *filp, fl_owner_t id)
* because some VM function reenables interrupts.
*
*/
- if (smpl_buf_vaddr) pfm_remove_smpl_mapping(current, smpl_buf_vaddr, smpl_buf_size);
+ if (smpl_buf_vaddr) pfm_remove_smpl_mapping(smpl_buf_vaddr, smpl_buf_size);
return 0;
}
@@ -1983,7 +1965,7 @@ pfm_close(struct inode *inode, struct file *filp)
return -EBADF;
}
- ctx = (pfm_context_t *)filp->private_data;
+ ctx = filp->private_data;
if (ctx == NULL) {
printk(KERN_ERR "perfmon: pfm_close: NULL ctx [%d]\n", task_pid_nr(current));
return -EBADF;
@@ -2173,25 +2155,26 @@ pfm_no_open(struct inode *irrelevant, struct file *dontcare)
static const struct file_operations pfm_file_ops = {
- .llseek = no_llseek,
- .read = pfm_read,
- .write = pfm_write,
- .poll = pfm_poll,
- .ioctl = pfm_ioctl,
- .open = pfm_no_open, /* special open code to disallow open via /proc */
- .fasync = pfm_fasync,
- .release = pfm_close,
- .flush = pfm_flush
+ .llseek = no_llseek,
+ .read = pfm_read,
+ .write = pfm_write,
+ .poll = pfm_poll,
+ .unlocked_ioctl = pfm_ioctl,
+ .open = pfm_no_open, /* special open code to disallow open via /proc */
+ .fasync = pfm_fasync,
+ .release = pfm_close,
+ .flush = pfm_flush
};
-static int
-pfmfs_delete_dentry(struct dentry *dentry)
+static char *pfmfs_dname(struct dentry *dentry, char *buffer, int buflen)
{
- return 1;
+ return dynamic_dname(dentry, buffer, buflen, "pfm:[%lu]",
+ dentry->d_inode->i_ino);
}
static const struct dentry_operations pfmfs_dentry_operations = {
- .d_delete = pfmfs_delete_dentry,
+ .d_delete = always_delete_dentry,
+ .d_dname = pfmfs_dname,
};
@@ -2201,8 +2184,7 @@ pfm_alloc_file(pfm_context_t *ctx)
struct file *file;
struct inode *inode;
struct path path;
- char name[32];
- struct qstr this;
+ struct qstr this = { .name = "" };
/*
* allocate a new inode
@@ -2217,28 +2199,22 @@ pfm_alloc_file(pfm_context_t *ctx)
inode->i_uid = current_fsuid();
inode->i_gid = current_fsgid();
- sprintf(name, "[%lu]", inode->i_ino);
- this.name = name;
- this.len = strlen(name);
- this.hash = inode->i_ino;
-
/*
* allocate a new dcache entry
*/
- path.dentry = d_alloc(pfmfs_mnt->mnt_sb->s_root, &this);
+ path.dentry = d_alloc(pfmfs_mnt->mnt_root, &this);
if (!path.dentry) {
iput(inode);
return ERR_PTR(-ENOMEM);
}
path.mnt = mntget(pfmfs_mnt);
- path.dentry->d_op = &pfmfs_dentry_operations;
d_add(path.dentry, inode);
file = alloc_file(&path, FMODE_READ, &pfm_file_ops);
- if (!file) {
+ if (IS_ERR(file)) {
path_put(&path);
- return ERR_PTR(-ENFILE);
+ return file;
}
file->f_flags = O_RDONLY;
@@ -2315,13 +2291,14 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t
DPRINT(("Cannot allocate vma\n"));
goto error_kmem;
}
+ INIT_LIST_HEAD(&vma->anon_vma_chain);
/*
* partially initialize the vma for the sampling buffer
*/
vma->vm_mm = mm;
- vma->vm_file = filp;
- vma->vm_flags = VM_READ| VM_MAYREAD |VM_RESERVED;
+ vma->vm_file = get_file(filp);
+ vma->vm_flags = VM_READ|VM_MAYREAD|VM_DONTEXPAND|VM_DONTDUMP;
vma->vm_page_prot = PAGE_READONLY; /* XXX may need to change */
/*
@@ -2341,8 +2318,8 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t
down_write(&task->mm->mmap_sem);
/* find some free area in address space, must have mmap sem held */
- vma->vm_start = pfm_get_unmapped_area(NULL, 0, size, 0, MAP_PRIVATE|MAP_ANONYMOUS, 0);
- if (vma->vm_start == 0UL) {
+ vma->vm_start = get_unmapped_area(NULL, 0, size, 0, MAP_PRIVATE|MAP_ANONYMOUS);
+ if (IS_ERR_VALUE(vma->vm_start)) {
DPRINT(("Cannot find unmapped area for size %ld\n", size));
up_write(&task->mm->mmap_sem);
goto error;
@@ -2359,15 +2336,12 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t
goto error;
}
- get_file(filp);
-
/*
* now insert the vma in the vm list for the process, must be
* done with mmap lock held
*/
insert_vm_struct(mm, vma);
- mm->total_vm += size >> PAGE_SHIFT;
vm_stat_account(vma->vm_mm, vma->vm_flags, vma->vm_file,
vma_pages(vma));
up_write(&task->mm->mmap_sem);
@@ -2395,8 +2369,8 @@ static int
pfm_bad_permissions(struct task_struct *task)
{
const struct cred *tcred;
- uid_t uid = current_uid();
- gid_t gid = current_gid();
+ kuid_t uid = current_uid();
+ kgid_t gid = current_gid();
int ret;
rcu_read_lock();
@@ -2404,20 +2378,20 @@ pfm_bad_permissions(struct task_struct *task)
/* inspired by ptrace_attach() */
DPRINT(("cur: uid=%d gid=%d task: euid=%d suid=%d uid=%d egid=%d sgid=%d\n",
- uid,
- gid,
- tcred->euid,
- tcred->suid,
- tcred->uid,
- tcred->egid,
- tcred->sgid));
-
- ret = ((uid != tcred->euid)
- || (uid != tcred->suid)
- || (uid != tcred->uid)
- || (gid != tcred->egid)
- || (gid != tcred->sgid)
- || (gid != tcred->gid)) && !capable(CAP_SYS_PTRACE);
+ from_kuid(&init_user_ns, uid),
+ from_kgid(&init_user_ns, gid),
+ from_kuid(&init_user_ns, tcred->euid),
+ from_kuid(&init_user_ns, tcred->suid),
+ from_kuid(&init_user_ns, tcred->uid),
+ from_kgid(&init_user_ns, tcred->egid),
+ from_kgid(&init_user_ns, tcred->sgid)));
+
+ ret = ((!uid_eq(uid, tcred->euid))
+ || (!uid_eq(uid, tcred->suid))
+ || (!uid_eq(uid, tcred->uid))
+ || (!gid_eq(gid, tcred->egid))
+ || (!gid_eq(gid, tcred->sgid))
+ || (!gid_eq(gid, tcred->gid))) && !capable(CAP_SYS_PTRACE);
rcu_read_unlock();
return ret;
@@ -2713,7 +2687,7 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg
goto buffer_error;
}
- DPRINT(("ctx=%p flags=0x%x system=%d notify_block=%d excl_idle=%d no_msg=%d ctx_fd=%d \n",
+ DPRINT(("ctx=%p flags=0x%x system=%d notify_block=%d excl_idle=%d no_msg=%d ctx_fd=%d\n",
ctx,
ctx_flags,
ctx->ctx_fl_system,
@@ -3677,7 +3651,7 @@ pfm_restart(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
* "self-monitoring".
*/
if (CTX_OVFL_NOBLOCK(ctx) == 0 && state == PFM_CTX_MASKED) {
- DPRINT(("unblocking [%d] \n", task_pid_nr(task)));
+ DPRINT(("unblocking [%d]\n", task_pid_nr(task)));
complete(&ctx->ctx_restart_done);
} else {
DPRINT(("[%d] armed exit trap\n", task_pid_nr(task)));
@@ -4797,7 +4771,7 @@ recheck:
asmlinkage long
sys_perfmonctl (int fd, int cmd, void __user *arg, int count)
{
- struct file *file = NULL;
+ struct fd f = {NULL, 0};
pfm_context_t *ctx = NULL;
unsigned long flags = 0UL;
void *args_k = NULL;
@@ -4894,17 +4868,17 @@ restart_args:
ret = -EBADF;
- file = fget(fd);
- if (unlikely(file == NULL)) {
+ f = fdget(fd);
+ if (unlikely(f.file == NULL)) {
DPRINT(("invalid fd %d\n", fd));
goto error_args;
}
- if (unlikely(PFM_IS_FILE(file) == 0)) {
+ if (unlikely(PFM_IS_FILE(f.file) == 0)) {
DPRINT(("fd %d not related to perfmon\n", fd));
goto error_args;
}
- ctx = (pfm_context_t *)file->private_data;
+ ctx = f.file->private_data;
if (unlikely(ctx == NULL)) {
DPRINT(("no context for fd %d\n", fd));
goto error_args;
@@ -4934,8 +4908,8 @@ abort_locked:
if (call_made && PFM_CMD_RW_ARG(cmd) && copy_to_user(arg, args_k, base_sz*count)) ret = -EFAULT;
error_args:
- if (file)
- fput(file);
+ if (f.file)
+ fdput(f);
kfree(args_k);
@@ -5667,24 +5641,8 @@ pfm_proc_show_header(struct seq_file *m)
list_for_each(pos, &pfm_buffer_fmt_list) {
entry = list_entry(pos, pfm_buffer_fmt_t, fmt_list);
- seq_printf(m, "format : %02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x %s\n",
- entry->fmt_uuid[0],
- entry->fmt_uuid[1],
- entry->fmt_uuid[2],
- entry->fmt_uuid[3],
- entry->fmt_uuid[4],
- entry->fmt_uuid[5],
- entry->fmt_uuid[6],
- entry->fmt_uuid[7],
- entry->fmt_uuid[8],
- entry->fmt_uuid[9],
- entry->fmt_uuid[10],
- entry->fmt_uuid[11],
- entry->fmt_uuid[12],
- entry->fmt_uuid[13],
- entry->fmt_uuid[14],
- entry->fmt_uuid[15],
- entry->fmt_name);
+ seq_printf(m, "format : %16phD %s\n",
+ entry->fmt_uuid, entry->fmt_name);
}
spin_unlock(&pfm_buffer_fmt_lock);
@@ -6429,7 +6387,6 @@ pfm_flush_pmds(struct task_struct *task, pfm_context_t *ctx)
static struct irqaction perfmon_irqaction = {
.handler = pfm_interrupt_handler,
- .flags = IRQF_DISABLED,
.name = "perfmon"
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 11:07:28 +0000