2005-04-17 02:20:36 +04:00
|
|
|
/*
|
|
|
|
* Architecture-specific setup.
|
|
|
|
*
|
|
|
|
* Copyright (C) 1998-2003 Hewlett-Packard Co
|
|
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* David Mosberger-Tang <davidm@hpl.hp.com>
|
2005-04-23 01:44:40 +04:00
|
|
|
* 04/11/17 Ashok Raj <ashok.raj@intel.com> Added CPU Hotplug Support
|
[IA64] Extend notify_die() hooks for IA64
notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and
INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple
notification points for these events because they can take many seconds
to run which has nasty effects on the behaviour of the rest of the
system.
DIE_SS replaced by a generic DIE_FAULT which checks the vector number,
to allow interception of faults other than SS.
DIE_MACHINE_{HALT,RESTART} added to allow last minute close down
processing, especially when the halt/restart routines are called from
error handlers.
DIE_OOPS added.
The check for kprobe's break numbers has been moved from traps.c to
kprobes.c, allowing DIE_BREAK to be used for any additional break
numbers, i.e. it is no longer kprobes specific.
Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE.
Both of these disable the system for long periods which impact on
watchdogs and heartbeat systems in general. More patches to come that
use these events to reset watchdogs and heartbeats.
unregister_die_notifier() added and both routines exported. Requested
by Dean Nelson.
Lock removed from {un,}register_die_notifier. notifier_chain_register()
already takes a lock. Also the generic notifier chain locking is being
reworked to distinguish between callbacks that can block and those that
cannot, the lock in {un,}register_die_notifier would interfere with
that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
Leading white space removed from arch/ia64/kernel/kprobes.c.
Typo in mca.c in original version of this patch found & fixed by Dean
Nelson.
Signed-off-by: Keith Owens <kaos@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-07 22:27:13 +03:00
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|
|
*
|
|
|
|
* 2005-10-07 Keith Owens <kaos@sgi.com>
|
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|
* Add notify_die() hooks.
|
2005-04-17 02:20:36 +04:00
|
|
|
*/
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|
|
|
#include <linux/cpu.h>
|
|
|
|
#include <linux/pm.h>
|
|
|
|
#include <linux/elf.h>
|
|
|
|
#include <linux/errno.h>
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|
|
|
#include <linux/kallsyms.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/mm.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 11:04:11 +03:00
|
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|
#include <linux/slab.h>
|
2005-04-17 02:20:36 +04:00
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|
#include <linux/module.h>
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|
#include <linux/notifier.h>
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|
|
#include <linux/personality.h>
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|
|
#include <linux/sched.h>
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#include <linux/stddef.h>
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|
#include <linux/thread_info.h>
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|
#include <linux/unistd.h>
|
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|
|
#include <linux/efi.h>
|
|
|
|
#include <linux/interrupt.h>
|
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|
|
#include <linux/delay.h>
|
2007-05-08 11:27:03 +04:00
|
|
|
#include <linux/kdebug.h>
|
2007-12-18 22:46:38 +03:00
|
|
|
#include <linux/utsname.h>
|
2008-10-06 21:43:06 +04:00
|
|
|
#include <linux/tracehook.h>
|
2012-08-25 00:22:13 +04:00
|
|
|
#include <linux/rcupdate.h>
|
2005-04-17 02:20:36 +04:00
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|
|
#include <asm/cpu.h>
|
|
|
|
#include <asm/delay.h>
|
|
|
|
#include <asm/elf.h>
|
|
|
|
#include <asm/irq.h>
|
2007-02-06 00:49:10 +03:00
|
|
|
#include <asm/kexec.h>
|
2005-04-17 02:20:36 +04:00
|
|
|
#include <asm/pgalloc.h>
|
|
|
|
#include <asm/processor.h>
|
|
|
|
#include <asm/sal.h>
|
2012-03-30 00:35:22 +04:00
|
|
|
#include <asm/switch_to.h>
|
2005-04-17 02:20:36 +04:00
|
|
|
#include <asm/tlbflush.h>
|
2016-12-24 22:46:01 +03:00
|
|
|
#include <linux/uaccess.h>
|
2005-04-17 02:20:36 +04:00
|
|
|
#include <asm/unwind.h>
|
|
|
|
#include <asm/user.h>
|
|
|
|
|
|
|
|
#include "entry.h"
|
|
|
|
|
|
|
|
#ifdef CONFIG_PERFMON
|
|
|
|
# include <asm/perfmon.h>
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include "sigframe.h"
|
|
|
|
|
|
|
|
void (*ia64_mark_idle)(int);
|
|
|
|
|
2010-11-03 19:06:14 +03:00
|
|
|
unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE;
|
2005-04-17 02:20:36 +04:00
|
|
|
EXPORT_SYMBOL(boot_option_idle_override);
|
2010-02-26 00:09:52 +03:00
|
|
|
void (*pm_power_off) (void);
|
|
|
|
EXPORT_SYMBOL(pm_power_off);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
void
|
|
|
|
ia64_do_show_stack (struct unw_frame_info *info, void *arg)
|
|
|
|
{
|
|
|
|
unsigned long ip, sp, bsp;
|
|
|
|
char buf[128]; /* don't make it so big that it overflows the stack! */
|
|
|
|
|
|
|
|
printk("\nCall Trace:\n");
|
|
|
|
do {
|
|
|
|
unw_get_ip(info, &ip);
|
|
|
|
if (ip == 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
unw_get_sp(info, &sp);
|
|
|
|
unw_get_bsp(info, &bsp);
|
|
|
|
snprintf(buf, sizeof(buf),
|
|
|
|
" [<%016lx>] %%s\n"
|
|
|
|
" sp=%016lx bsp=%016lx\n",
|
|
|
|
ip, sp, bsp);
|
|
|
|
print_symbol(buf, ip);
|
|
|
|
} while (unw_unwind(info) >= 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
show_stack (struct task_struct *task, unsigned long *sp)
|
|
|
|
{
|
|
|
|
if (!task)
|
|
|
|
unw_init_running(ia64_do_show_stack, NULL);
|
|
|
|
else {
|
|
|
|
struct unw_frame_info info;
|
|
|
|
|
|
|
|
unw_init_from_blocked_task(&info, task);
|
|
|
|
ia64_do_show_stack(&info, NULL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
show_regs (struct pt_regs *regs)
|
|
|
|
{
|
|
|
|
unsigned long ip = regs->cr_iip + ia64_psr(regs)->ri;
|
|
|
|
|
|
|
|
print_modules();
|
dump_stack: unify debug information printed by show_regs()
show_regs() is inherently arch-dependent but it does make sense to print
generic debug information and some archs already do albeit in slightly
different forms. This patch introduces a generic function to print debug
information from show_regs() so that different archs print out the same
information and it's much easier to modify what's printed.
show_regs_print_info() prints out the same debug info as dump_stack()
does plus task and thread_info pointers.
* Archs which didn't print debug info now do.
alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
um, xtensa
* Already prints debug info. Replaced with show_regs_print_info().
The printed information is superset of what used to be there.
arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86
* s390 is special in that it used to print arch-specific information
along with generic debug info. Heiko and Martin think that the
arch-specific extra isn't worth keeping s390 specfic implementation.
Converted to use the generic version.
Note that now all archs print the debug info before actual register
dumps.
An example BUG() dump follows.
kernel BUG at /work/os/work/kernel/workqueue.c:4841!
invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
Hardware name: empty empty/S3992, BIOS 080011 10/26/2007
task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
RIP: 0010:[<ffffffff8234a07e>] [<ffffffff8234a07e>] init_workqueues+0x4/0x6
RSP: 0000:ffff88007c861ec8 EFLAGS: 00010246
RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
Call Trace:
[<ffffffff81000312>] do_one_initcall+0x122/0x170
[<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8
[<ffffffff81c47760>] ? rest_init+0x140/0x140
[<ffffffff81c4776e>] kernel_init+0xe/0xf0
[<ffffffff81c6be9c>] ret_from_fork+0x7c/0xb0
[<ffffffff81c47760>] ? rest_init+0x140/0x140
...
v2: Typo fix in x86-32.
v3: CPU number dropped from show_regs_print_info() as
dump_stack_print_info() has been updated to print it. s390
specific implementation dropped as requested by s390 maintainers.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com> [tile bits]
Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon bits]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-01 02:27:17 +04:00
|
|
|
printk("\n");
|
|
|
|
show_regs_print_info(KERN_DEFAULT);
|
2007-12-18 22:46:38 +03:00
|
|
|
printk("psr : %016lx ifs : %016lx ip : [<%016lx>] %s (%s)\n",
|
|
|
|
regs->cr_ipsr, regs->cr_ifs, ip, print_tainted(),
|
|
|
|
init_utsname()->release);
|
2005-04-17 02:20:36 +04:00
|
|
|
print_symbol("ip is at %s\n", ip);
|
|
|
|
printk("unat: %016lx pfs : %016lx rsc : %016lx\n",
|
|
|
|
regs->ar_unat, regs->ar_pfs, regs->ar_rsc);
|
|
|
|
printk("rnat: %016lx bsps: %016lx pr : %016lx\n",
|
|
|
|
regs->ar_rnat, regs->ar_bspstore, regs->pr);
|
|
|
|
printk("ldrs: %016lx ccv : %016lx fpsr: %016lx\n",
|
|
|
|
regs->loadrs, regs->ar_ccv, regs->ar_fpsr);
|
|
|
|
printk("csd : %016lx ssd : %016lx\n", regs->ar_csd, regs->ar_ssd);
|
|
|
|
printk("b0 : %016lx b6 : %016lx b7 : %016lx\n", regs->b0, regs->b6, regs->b7);
|
|
|
|
printk("f6 : %05lx%016lx f7 : %05lx%016lx\n",
|
|
|
|
regs->f6.u.bits[1], regs->f6.u.bits[0],
|
|
|
|
regs->f7.u.bits[1], regs->f7.u.bits[0]);
|
|
|
|
printk("f8 : %05lx%016lx f9 : %05lx%016lx\n",
|
|
|
|
regs->f8.u.bits[1], regs->f8.u.bits[0],
|
|
|
|
regs->f9.u.bits[1], regs->f9.u.bits[0]);
|
|
|
|
printk("f10 : %05lx%016lx f11 : %05lx%016lx\n",
|
|
|
|
regs->f10.u.bits[1], regs->f10.u.bits[0],
|
|
|
|
regs->f11.u.bits[1], regs->f11.u.bits[0]);
|
|
|
|
|
|
|
|
printk("r1 : %016lx r2 : %016lx r3 : %016lx\n", regs->r1, regs->r2, regs->r3);
|
|
|
|
printk("r8 : %016lx r9 : %016lx r10 : %016lx\n", regs->r8, regs->r9, regs->r10);
|
|
|
|
printk("r11 : %016lx r12 : %016lx r13 : %016lx\n", regs->r11, regs->r12, regs->r13);
|
|
|
|
printk("r14 : %016lx r15 : %016lx r16 : %016lx\n", regs->r14, regs->r15, regs->r16);
|
|
|
|
printk("r17 : %016lx r18 : %016lx r19 : %016lx\n", regs->r17, regs->r18, regs->r19);
|
|
|
|
printk("r20 : %016lx r21 : %016lx r22 : %016lx\n", regs->r20, regs->r21, regs->r22);
|
|
|
|
printk("r23 : %016lx r24 : %016lx r25 : %016lx\n", regs->r23, regs->r24, regs->r25);
|
|
|
|
printk("r26 : %016lx r27 : %016lx r28 : %016lx\n", regs->r26, regs->r27, regs->r28);
|
|
|
|
printk("r29 : %016lx r30 : %016lx r31 : %016lx\n", regs->r29, regs->r30, regs->r31);
|
|
|
|
|
|
|
|
if (user_mode(regs)) {
|
|
|
|
/* print the stacked registers */
|
|
|
|
unsigned long val, *bsp, ndirty;
|
|
|
|
int i, sof, is_nat = 0;
|
|
|
|
|
|
|
|
sof = regs->cr_ifs & 0x7f; /* size of frame */
|
|
|
|
ndirty = (regs->loadrs >> 19);
|
|
|
|
bsp = ia64_rse_skip_regs((unsigned long *) regs->ar_bspstore, ndirty);
|
|
|
|
for (i = 0; i < sof; ++i) {
|
|
|
|
get_user(val, (unsigned long __user *) ia64_rse_skip_regs(bsp, i));
|
|
|
|
printk("r%-3u:%c%016lx%s", 32 + i, is_nat ? '*' : ' ', val,
|
|
|
|
((i == sof - 1) || (i % 3) == 2) ? "\n" : " ");
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
show_stack(NULL, NULL);
|
|
|
|
}
|
|
|
|
|
2009-09-14 22:13:37 +04:00
|
|
|
/* local support for deprecated console_print */
|
|
|
|
void
|
|
|
|
console_print(const char *s)
|
|
|
|
{
|
|
|
|
printk(KERN_EMERG "%s", s);
|
|
|
|
}
|
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
void
|
2008-05-09 10:26:35 +04:00
|
|
|
do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
|
|
|
if (fsys_mode(current, &scr->pt)) {
|
2008-05-09 10:26:35 +04:00
|
|
|
/*
|
|
|
|
* defer signal-handling etc. until we return to
|
|
|
|
* privilege-level 0.
|
|
|
|
*/
|
2005-04-17 02:20:36 +04:00
|
|
|
if (!ia64_psr(&scr->pt)->lp)
|
|
|
|
ia64_psr(&scr->pt)->lp = 1;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PERFMON
|
|
|
|
if (current->thread.pfm_needs_checking)
|
2008-05-09 10:26:35 +04:00
|
|
|
/*
|
|
|
|
* Note: pfm_handle_work() allow us to call it with interrupts
|
|
|
|
* disabled, and may enable interrupts within the function.
|
|
|
|
*/
|
2005-04-17 02:20:36 +04:00
|
|
|
pfm_handle_work();
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* deal with pending signal delivery */
|
2008-05-09 10:26:35 +04:00
|
|
|
if (test_thread_flag(TIF_SIGPENDING)) {
|
|
|
|
local_irq_enable(); /* force interrupt enable */
|
2007-01-23 19:03:17 +03:00
|
|
|
ia64_do_signal(scr, in_syscall);
|
2008-05-09 10:26:35 +04:00
|
|
|
}
|
2007-12-12 17:23:34 +03:00
|
|
|
|
2012-09-20 22:47:13 +04:00
|
|
|
if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) {
|
|
|
|
local_irq_enable(); /* force interrupt enable */
|
2008-10-06 21:43:06 +04:00
|
|
|
tracehook_notify_resume(&scr->pt);
|
|
|
|
}
|
|
|
|
|
2007-12-12 17:23:34 +03:00
|
|
|
/* copy user rbs to kernel rbs */
|
2008-05-09 10:26:35 +04:00
|
|
|
if (unlikely(test_thread_flag(TIF_RESTORE_RSE))) {
|
|
|
|
local_irq_enable(); /* force interrupt enable */
|
2007-12-12 17:23:34 +03:00
|
|
|
ia64_sync_krbs();
|
2008-05-09 10:26:35 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
local_irq_disable(); /* force interrupt disable */
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
static int __init nohalt_setup(char * str)
|
|
|
|
{
|
2013-03-22 01:49:47 +04:00
|
|
|
cpu_idle_poll_ctrl(true);
|
2005-04-17 02:20:36 +04:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
__setup("nohalt", nohalt_setup);
|
|
|
|
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
|
|
/* We don't actually take CPU down, just spin without interrupts. */
|
|
|
|
static inline void play_dead(void)
|
|
|
|
{
|
2005-04-23 01:44:40 +04:00
|
|
|
unsigned int this_cpu = smp_processor_id();
|
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
/* Ack it */
|
ia64: Replace __get_cpu_var uses
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2014-08-17 21:30:47 +04:00
|
|
|
__this_cpu_write(cpu_state, CPU_DEAD);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
max_xtp();
|
|
|
|
local_irq_disable();
|
2005-04-23 01:44:40 +04:00
|
|
|
idle_task_exit();
|
|
|
|
ia64_jump_to_sal(&sal_boot_rendez_state[this_cpu]);
|
2005-04-17 02:20:36 +04:00
|
|
|
/*
|
2005-04-23 01:44:40 +04:00
|
|
|
* The above is a point of no-return, the processor is
|
|
|
|
* expected to be in SAL loop now.
|
2005-04-17 02:20:36 +04:00
|
|
|
*/
|
2005-04-23 01:44:40 +04:00
|
|
|
BUG();
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void play_dead(void)
|
|
|
|
{
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_HOTPLUG_CPU */
|
|
|
|
|
2013-03-22 01:49:47 +04:00
|
|
|
void arch_cpu_idle_dead(void)
|
|
|
|
{
|
|
|
|
play_dead();
|
|
|
|
}
|
|
|
|
|
|
|
|
void arch_cpu_idle(void)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
|
|
|
void (*mark_idle)(int) = ia64_mark_idle;
|
2005-11-16 01:37:05 +03:00
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
#ifdef CONFIG_SMP
|
2013-03-22 01:49:47 +04:00
|
|
|
min_xtp();
|
2005-04-17 02:20:36 +04:00
|
|
|
#endif
|
2013-03-22 01:49:47 +04:00
|
|
|
rmb();
|
|
|
|
if (mark_idle)
|
|
|
|
(*mark_idle)(1);
|
|
|
|
|
|
|
|
safe_halt();
|
2005-04-17 02:20:36 +04:00
|
|
|
|
2013-03-22 01:49:47 +04:00
|
|
|
if (mark_idle)
|
|
|
|
(*mark_idle)(0);
|
2005-04-17 02:20:36 +04:00
|
|
|
#ifdef CONFIG_SMP
|
2013-03-22 01:49:47 +04:00
|
|
|
normal_xtp();
|
2005-04-17 02:20:36 +04:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
|
|
|
|
ia64: Replace __get_cpu_var uses
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2014-08-17 21:30:47 +04:00
|
|
|
info = __this_cpu_read(pfm_syst_info);
|
2005-04-17 02:20:36 +04:00
|
|
|
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);
|
|
|
|
|
ia64: Replace __get_cpu_var uses
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2014-08-17 21:30:47 +04:00
|
|
|
info = __this_cpu_read(pfm_syst_info);
|
2005-04-17 02:20:36 +04:00
|
|
|
if (info & PFM_CPUINFO_SYST_WIDE)
|
|
|
|
pfm_syst_wide_update_task(task, info, 1);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Copy the state of an ia-64 thread.
|
|
|
|
*
|
|
|
|
* We get here through the following call chain:
|
|
|
|
*
|
|
|
|
* from user-level: from kernel:
|
|
|
|
*
|
|
|
|
* <clone syscall> <some kernel call frames>
|
|
|
|
* sys_clone :
|
|
|
|
* do_fork do_fork
|
|
|
|
* copy_thread copy_thread
|
|
|
|
*
|
|
|
|
* This means that the stack layout is as follows:
|
|
|
|
*
|
|
|
|
* +---------------------+ (highest addr)
|
|
|
|
* | struct pt_regs |
|
|
|
|
* +---------------------+
|
|
|
|
* | struct switch_stack |
|
|
|
|
* +---------------------+
|
|
|
|
* | |
|
|
|
|
* | memory stack |
|
|
|
|
* | | <-- sp (lowest addr)
|
|
|
|
* +---------------------+
|
|
|
|
*
|
|
|
|
* Observe that we copy the unat values that are in pt_regs and switch_stack. Spilling an
|
|
|
|
* integer to address X causes bit N in ar.unat to be set to the NaT bit of the register,
|
|
|
|
* with N=(X & 0x1ff)/8. Thus, copying the unat value preserves the NaT bits ONLY if the
|
|
|
|
* pt_regs structure in the parent is congruent to that of the child, modulo 512. Since
|
|
|
|
* the stack is page aligned and the page size is at least 4KB, this is always the case,
|
|
|
|
* so there is nothing to worry about.
|
|
|
|
*/
|
|
|
|
int
|
2009-04-03 03:56:59 +04:00
|
|
|
copy_thread(unsigned long clone_flags,
|
2005-04-17 02:20:36 +04:00
|
|
|
unsigned long user_stack_base, unsigned long user_stack_size,
|
2012-10-23 06:51:14 +04:00
|
|
|
struct task_struct *p)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
2010-02-08 21:42:17 +03:00
|
|
|
extern char ia64_ret_from_clone;
|
2005-04-17 02:20:36 +04:00
|
|
|
struct switch_stack *child_stack, *stack;
|
|
|
|
unsigned long rbs, child_rbs, rbs_size;
|
|
|
|
struct pt_regs *child_ptregs;
|
2012-10-23 06:51:14 +04:00
|
|
|
struct pt_regs *regs = current_pt_regs();
|
2005-04-17 02:20:36 +04:00
|
|
|
int retval = 0;
|
|
|
|
|
|
|
|
child_ptregs = (struct pt_regs *) ((unsigned long) p + IA64_STK_OFFSET) - 1;
|
|
|
|
child_stack = (struct switch_stack *) child_ptregs - 1;
|
|
|
|
|
|
|
|
rbs = (unsigned long) current + IA64_RBS_OFFSET;
|
|
|
|
child_rbs = (unsigned long) p + IA64_RBS_OFFSET;
|
|
|
|
|
|
|
|
/* copy parts of thread_struct: */
|
|
|
|
p->thread.ksp = (unsigned long) child_stack - 16;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* NOTE: The calling convention considers all floating point
|
|
|
|
* registers in the high partition (fph) to be scratch. Since
|
|
|
|
* the only way to get to this point is through a system call,
|
|
|
|
* we know that the values in fph are all dead. Hence, there
|
|
|
|
* is no need to inherit the fph state from the parent to the
|
|
|
|
* child and all we have to do is to make sure that
|
|
|
|
* IA64_THREAD_FPH_VALID is cleared in the child.
|
|
|
|
*
|
|
|
|
* XXX We could push this optimization a bit further by
|
|
|
|
* clearing IA64_THREAD_FPH_VALID on ANY system call.
|
|
|
|
* However, it's not clear this is worth doing. Also, it
|
|
|
|
* would be a slight deviation from the normal Linux system
|
|
|
|
* call behavior where scratch registers are preserved across
|
|
|
|
* system calls (unless used by the system call itself).
|
|
|
|
*/
|
|
|
|
# define THREAD_FLAGS_TO_CLEAR (IA64_THREAD_FPH_VALID | IA64_THREAD_DBG_VALID \
|
|
|
|
| IA64_THREAD_PM_VALID)
|
|
|
|
# define THREAD_FLAGS_TO_SET 0
|
|
|
|
p->thread.flags = ((current->thread.flags & ~THREAD_FLAGS_TO_CLEAR)
|
|
|
|
| THREAD_FLAGS_TO_SET);
|
2012-10-14 23:43:06 +04:00
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
ia64_drop_fpu(p); /* don't pick up stale state from a CPU's fph */
|
|
|
|
|
2012-10-14 23:43:06 +04:00
|
|
|
if (unlikely(p->flags & PF_KTHREAD)) {
|
|
|
|
if (unlikely(!user_stack_base)) {
|
|
|
|
/* fork_idle() called us */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
memset(child_stack, 0, sizeof(*child_ptregs) + sizeof(*child_stack));
|
|
|
|
child_stack->r4 = user_stack_base; /* payload */
|
|
|
|
child_stack->r5 = user_stack_size; /* argument */
|
|
|
|
/*
|
|
|
|
* Preserve PSR bits, except for bits 32-34 and 37-45,
|
|
|
|
* which we can't read.
|
|
|
|
*/
|
|
|
|
child_ptregs->cr_ipsr = ia64_getreg(_IA64_REG_PSR) | IA64_PSR_BN;
|
|
|
|
/* mark as valid, empty frame */
|
|
|
|
child_ptregs->cr_ifs = 1UL << 63;
|
|
|
|
child_stack->ar_fpsr = child_ptregs->ar_fpsr
|
|
|
|
= ia64_getreg(_IA64_REG_AR_FPSR);
|
|
|
|
child_stack->pr = (1 << PRED_KERNEL_STACK);
|
|
|
|
child_stack->ar_bspstore = child_rbs;
|
|
|
|
child_stack->b0 = (unsigned long) &ia64_ret_from_clone;
|
|
|
|
|
|
|
|
/* stop some PSR bits from being inherited.
|
|
|
|
* the psr.up/psr.pp bits must be cleared on fork but inherited on execve()
|
|
|
|
* therefore we must specify them explicitly here and not include them in
|
|
|
|
* IA64_PSR_BITS_TO_CLEAR.
|
|
|
|
*/
|
|
|
|
child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
|
|
|
|
& ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
stack = ((struct switch_stack *) regs) - 1;
|
|
|
|
/* copy parent's switch_stack & pt_regs to child: */
|
|
|
|
memcpy(child_stack, stack, sizeof(*child_ptregs) + sizeof(*child_stack));
|
|
|
|
|
|
|
|
/* copy the parent's register backing store to the child: */
|
|
|
|
rbs_size = stack->ar_bspstore - rbs;
|
|
|
|
memcpy((void *) child_rbs, (void *) rbs, rbs_size);
|
|
|
|
if (clone_flags & CLONE_SETTLS)
|
|
|
|
child_ptregs->r13 = regs->r16; /* see sys_clone2() in entry.S */
|
|
|
|
if (user_stack_base) {
|
|
|
|
child_ptregs->r12 = user_stack_base + user_stack_size - 16;
|
|
|
|
child_ptregs->ar_bspstore = user_stack_base;
|
|
|
|
child_ptregs->ar_rnat = 0;
|
|
|
|
child_ptregs->loadrs = 0;
|
|
|
|
}
|
|
|
|
child_stack->ar_bspstore = child_rbs + rbs_size;
|
|
|
|
child_stack->b0 = (unsigned long) &ia64_ret_from_clone;
|
|
|
|
|
|
|
|
/* stop some PSR bits from being inherited.
|
|
|
|
* the psr.up/psr.pp bits must be cleared on fork but inherited on execve()
|
|
|
|
* therefore we must specify them explicitly here and not include them in
|
|
|
|
* IA64_PSR_BITS_TO_CLEAR.
|
|
|
|
*/
|
|
|
|
child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
|
|
|
|
& ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
|
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
#ifdef CONFIG_PERFMON
|
|
|
|
if (current->thread.pfm_context)
|
|
|
|
pfm_inherit(p, child_ptregs);
|
|
|
|
#endif
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
do_copy_task_regs (struct task_struct *task, struct unw_frame_info *info, void *arg)
|
|
|
|
{
|
2007-07-11 19:26:30 +04:00
|
|
|
unsigned long mask, sp, nat_bits = 0, ar_rnat, urbs_end, cfm;
|
|
|
|
unsigned long uninitialized_var(ip); /* GCC be quiet */
|
2005-04-17 02:20:36 +04:00
|
|
|
elf_greg_t *dst = arg;
|
|
|
|
struct pt_regs *pt;
|
|
|
|
char nat;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
memset(dst, 0, sizeof(elf_gregset_t)); /* don't leak any kernel bits to user-level */
|
|
|
|
|
|
|
|
if (unw_unwind_to_user(info) < 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
unw_get_sp(info, &sp);
|
|
|
|
pt = (struct pt_regs *) (sp + 16);
|
|
|
|
|
|
|
|
urbs_end = ia64_get_user_rbs_end(task, pt, &cfm);
|
|
|
|
|
|
|
|
if (ia64_sync_user_rbs(task, info->sw, pt->ar_bspstore, urbs_end) < 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
ia64_peek(task, info->sw, urbs_end, (long) ia64_rse_rnat_addr((long *) urbs_end),
|
|
|
|
&ar_rnat);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* coredump format:
|
|
|
|
* r0-r31
|
|
|
|
* NaT bits (for r0-r31; bit N == 1 iff rN is a NaT)
|
|
|
|
* predicate registers (p0-p63)
|
|
|
|
* b0-b7
|
|
|
|
* ip cfm user-mask
|
|
|
|
* ar.rsc ar.bsp ar.bspstore ar.rnat
|
|
|
|
* ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* r0 is zero */
|
|
|
|
for (i = 1, mask = (1UL << i); i < 32; ++i) {
|
|
|
|
unw_get_gr(info, i, &dst[i], &nat);
|
|
|
|
if (nat)
|
|
|
|
nat_bits |= mask;
|
|
|
|
mask <<= 1;
|
|
|
|
}
|
|
|
|
dst[32] = nat_bits;
|
|
|
|
unw_get_pr(info, &dst[33]);
|
|
|
|
|
|
|
|
for (i = 0; i < 8; ++i)
|
|
|
|
unw_get_br(info, i, &dst[34 + i]);
|
|
|
|
|
|
|
|
unw_get_rp(info, &ip);
|
|
|
|
dst[42] = ip + ia64_psr(pt)->ri;
|
|
|
|
dst[43] = cfm;
|
|
|
|
dst[44] = pt->cr_ipsr & IA64_PSR_UM;
|
|
|
|
|
|
|
|
unw_get_ar(info, UNW_AR_RSC, &dst[45]);
|
|
|
|
/*
|
|
|
|
* For bsp and bspstore, unw_get_ar() would return the kernel
|
|
|
|
* addresses, but we need the user-level addresses instead:
|
|
|
|
*/
|
|
|
|
dst[46] = urbs_end; /* note: by convention PT_AR_BSP points to the end of the urbs! */
|
|
|
|
dst[47] = pt->ar_bspstore;
|
|
|
|
dst[48] = ar_rnat;
|
|
|
|
unw_get_ar(info, UNW_AR_CCV, &dst[49]);
|
|
|
|
unw_get_ar(info, UNW_AR_UNAT, &dst[50]);
|
|
|
|
unw_get_ar(info, UNW_AR_FPSR, &dst[51]);
|
|
|
|
dst[52] = pt->ar_pfs; /* UNW_AR_PFS is == to pt->cr_ifs for interrupt frames */
|
|
|
|
unw_get_ar(info, UNW_AR_LC, &dst[53]);
|
|
|
|
unw_get_ar(info, UNW_AR_EC, &dst[54]);
|
|
|
|
unw_get_ar(info, UNW_AR_CSD, &dst[55]);
|
|
|
|
unw_get_ar(info, UNW_AR_SSD, &dst[56]);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
do_dump_task_fpu (struct task_struct *task, struct unw_frame_info *info, void *arg)
|
|
|
|
{
|
|
|
|
elf_fpreg_t *dst = arg;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
memset(dst, 0, sizeof(elf_fpregset_t)); /* don't leak any "random" bits */
|
|
|
|
|
|
|
|
if (unw_unwind_to_user(info) < 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* f0 is 0.0, f1 is 1.0 */
|
|
|
|
|
|
|
|
for (i = 2; i < 32; ++i)
|
|
|
|
unw_get_fr(info, i, dst + i);
|
|
|
|
|
|
|
|
ia64_flush_fph(task);
|
|
|
|
if ((task->thread.flags & IA64_THREAD_FPH_VALID) != 0)
|
|
|
|
memcpy(dst + 32, task->thread.fph, 96*16);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
do_copy_regs (struct unw_frame_info *info, void *arg)
|
|
|
|
{
|
|
|
|
do_copy_task_regs(current, info, arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
do_dump_fpu (struct unw_frame_info *info, void *arg)
|
|
|
|
{
|
|
|
|
do_dump_task_fpu(current, info, arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
|
|
|
|
{
|
|
|
|
unw_init_running(do_copy_regs, dst);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)
|
|
|
|
{
|
|
|
|
unw_init_running(do_dump_fpu, dst);
|
|
|
|
return 1; /* f0-f31 are always valid so we always return 1 */
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Flush thread state. This is called when a thread does an execve().
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
flush_thread (void)
|
|
|
|
{
|
|
|
|
/* drop floating-point and debug-register state if it exists: */
|
|
|
|
current->thread.flags &= ~(IA64_THREAD_FPH_VALID | IA64_THREAD_DBG_VALID);
|
|
|
|
ia64_drop_fpu(current);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2016-05-21 03:00:20 +03:00
|
|
|
* Clean up state associated with a thread. This is called when
|
2005-04-17 02:20:36 +04:00
|
|
|
* the thread calls exit().
|
|
|
|
*/
|
|
|
|
void
|
2016-05-21 03:00:20 +03:00
|
|
|
exit_thread (struct task_struct *tsk)
|
2005-04-17 02:20:36 +04:00
|
|
|
{
|
2005-06-28 02:17:12 +04:00
|
|
|
|
2016-05-21 03:00:20 +03:00
|
|
|
ia64_drop_fpu(tsk);
|
2005-04-17 02:20:36 +04:00
|
|
|
#ifdef CONFIG_PERFMON
|
|
|
|
/* if needed, stop monitoring and flush state to perfmon context */
|
2016-05-21 03:00:20 +03:00
|
|
|
if (tsk->thread.pfm_context)
|
|
|
|
pfm_exit_thread(tsk);
|
2005-04-17 02:20:36 +04:00
|
|
|
|
|
|
|
/* free debug register resources */
|
2016-05-21 03:00:20 +03:00
|
|
|
if (tsk->thread.flags & IA64_THREAD_DBG_VALID)
|
|
|
|
pfm_release_debug_registers(tsk);
|
2005-04-17 02:20:36 +04:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned long
|
|
|
|
get_wchan (struct task_struct *p)
|
|
|
|
{
|
|
|
|
struct unw_frame_info info;
|
|
|
|
unsigned long ip;
|
|
|
|
int count = 0;
|
|
|
|
|
2007-05-18 22:46:52 +04:00
|
|
|
if (!p || p == current || p->state == TASK_RUNNING)
|
|
|
|
return 0;
|
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
/*
|
|
|
|
* Note: p may not be a blocked task (it could be current or
|
|
|
|
* another process running on some other CPU. Rather than
|
|
|
|
* trying to determine if p is really blocked, we just assume
|
|
|
|
* it's blocked and rely on the unwind routines to fail
|
|
|
|
* gracefully if the process wasn't really blocked after all.
|
|
|
|
* --davidm 99/12/15
|
|
|
|
*/
|
|
|
|
unw_init_from_blocked_task(&info, p);
|
|
|
|
do {
|
2007-05-18 22:46:52 +04:00
|
|
|
if (p->state == TASK_RUNNING)
|
|
|
|
return 0;
|
2005-04-17 02:20:36 +04:00
|
|
|
if (unw_unwind(&info) < 0)
|
|
|
|
return 0;
|
|
|
|
unw_get_ip(&info, &ip);
|
|
|
|
if (!in_sched_functions(ip))
|
|
|
|
return ip;
|
|
|
|
} while (count++ < 16);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
cpu_halt (void)
|
|
|
|
{
|
|
|
|
pal_power_mgmt_info_u_t power_info[8];
|
|
|
|
unsigned long min_power;
|
|
|
|
int i, min_power_state;
|
|
|
|
|
|
|
|
if (ia64_pal_halt_info(power_info) != 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
min_power_state = 0;
|
|
|
|
min_power = power_info[0].pal_power_mgmt_info_s.power_consumption;
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
|
|
if (power_info[i].pal_power_mgmt_info_s.im
|
|
|
|
&& power_info[i].pal_power_mgmt_info_s.power_consumption < min_power) {
|
|
|
|
min_power = power_info[i].pal_power_mgmt_info_s.power_consumption;
|
|
|
|
min_power_state = i;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (1)
|
|
|
|
ia64_pal_halt(min_power_state);
|
|
|
|
}
|
|
|
|
|
2007-02-06 00:49:10 +03:00
|
|
|
void machine_shutdown(void)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
|
|
int cpu;
|
|
|
|
|
|
|
|
for_each_online_cpu(cpu) {
|
|
|
|
if (cpu != smp_processor_id())
|
|
|
|
cpu_down(cpu);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
|
|
kexec_disable_iosapic();
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2005-04-17 02:20:36 +04:00
|
|
|
void
|
|
|
|
machine_restart (char *restart_cmd)
|
|
|
|
{
|
[IA64] Extend notify_die() hooks for IA64
notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and
INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple
notification points for these events because they can take many seconds
to run which has nasty effects on the behaviour of the rest of the
system.
DIE_SS replaced by a generic DIE_FAULT which checks the vector number,
to allow interception of faults other than SS.
DIE_MACHINE_{HALT,RESTART} added to allow last minute close down
processing, especially when the halt/restart routines are called from
error handlers.
DIE_OOPS added.
The check for kprobe's break numbers has been moved from traps.c to
kprobes.c, allowing DIE_BREAK to be used for any additional break
numbers, i.e. it is no longer kprobes specific.
Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE.
Both of these disable the system for long periods which impact on
watchdogs and heartbeat systems in general. More patches to come that
use these events to reset watchdogs and heartbeats.
unregister_die_notifier() added and both routines exported. Requested
by Dean Nelson.
Lock removed from {un,}register_die_notifier. notifier_chain_register()
already takes a lock. Also the generic notifier chain locking is being
reworked to distinguish between callbacks that can block and those that
cannot, the lock in {un,}register_die_notifier would interfere with
that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
Leading white space removed from arch/ia64/kernel/kprobes.c.
Typo in mca.c in original version of this patch found & fixed by Dean
Nelson.
Signed-off-by: Keith Owens <kaos@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-07 22:27:13 +03:00
|
|
|
(void) notify_die(DIE_MACHINE_RESTART, restart_cmd, NULL, 0, 0, 0);
|
2014-06-13 15:22:22 +04:00
|
|
|
efi_reboot(REBOOT_WARM, NULL);
|
2005-04-17 02:20:36 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
machine_halt (void)
|
|
|
|
{
|
[IA64] Extend notify_die() hooks for IA64
notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and
INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple
notification points for these events because they can take many seconds
to run which has nasty effects on the behaviour of the rest of the
system.
DIE_SS replaced by a generic DIE_FAULT which checks the vector number,
to allow interception of faults other than SS.
DIE_MACHINE_{HALT,RESTART} added to allow last minute close down
processing, especially when the halt/restart routines are called from
error handlers.
DIE_OOPS added.
The check for kprobe's break numbers has been moved from traps.c to
kprobes.c, allowing DIE_BREAK to be used for any additional break
numbers, i.e. it is no longer kprobes specific.
Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE.
Both of these disable the system for long periods which impact on
watchdogs and heartbeat systems in general. More patches to come that
use these events to reset watchdogs and heartbeats.
unregister_die_notifier() added and both routines exported. Requested
by Dean Nelson.
Lock removed from {un,}register_die_notifier. notifier_chain_register()
already takes a lock. Also the generic notifier chain locking is being
reworked to distinguish between callbacks that can block and those that
cannot, the lock in {un,}register_die_notifier would interfere with
that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2
Leading white space removed from arch/ia64/kernel/kprobes.c.
Typo in mca.c in original version of this patch found & fixed by Dean
Nelson.
Signed-off-by: Keith Owens <kaos@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-07 22:27:13 +03:00
|
|
|
(void) notify_die(DIE_MACHINE_HALT, "", NULL, 0, 0, 0);
|
2005-04-17 02:20:36 +04:00
|
|
|
cpu_halt();
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
machine_power_off (void)
|
|
|
|
{
|
|
|
|
if (pm_power_off)
|
|
|
|
pm_power_off();
|
|
|
|
machine_halt();
|
|
|
|
}
|
|
|
|
|