Commit Graph

1521 Commits

Author SHA1 Message Date
Thomas Gleixner
cdbedc61c8 mips: Use generic idle loop
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Link: http://lkml.kernel.org/r/20130321215234.754954871@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-08 17:39:26 +02:00
Linus Torvalds
6cfa92382e Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
 "Fixes for a number of small glitches in various corners of the MIPS
  tree.  No particular areas is standing out.

  With this applied all MIPS defconfigs are building fine.  No merge
  conflicts are expected."

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Delete definition of SA_RESTORER.
  MIPS: Fix ISA level which causes secondary cache init bypassing and more
  MIPS: Fix build error cavium-octeon without CONFIG_SMP
  MIPS: Kconfig: Rename SNIPROM too
  MIPS: Alchemy: Fix typo "CONFIG_DEBUG_PCI"
  MIPS: Unbreak function tracer for 64-bit kernel.
2013-04-05 12:23:12 -07:00
Deng-Cheng Zhu
adb3789264 MIPS: Fix ISA level which causes secondary cache init bypassing and more
The commit a96102be70 introduced set_isa() where compatible ISA info is
also set aside from the one gets passed in. It means, for example, 1004K
will have MIPS_CPU_ISA_M32R2/M32R1/II/I flags. This leads to things like
the following inappropriate:

if (c->isa_level == MIPS_CPU_ISA_M32R1 ||
    c->isa_level == MIPS_CPU_ISA_M32R2 ||
    c->isa_level == MIPS_CPU_ISA_M64R1 ||
    c->isa_level == MIPS_CPU_ISA_M64R2)

This patch fixes it.

Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-04-05 15:10:45 +02:00
David Daney
ad8c396936 MIPS: Unbreak function tracer for 64-bit kernel.
Commit 58b69401c7 [MIPS: Function tracer: Fix broken function tracing]
completely broke the function tracer for 64-bit kernels.  The symptom is
a system hang very early in the boot process.

The fix: Remove/fix $sp adjustments for 64-bit case.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Al Cooper <alcooperx@gmail.com>
Cc: viric@viric.name
Cc: stable@vger.kernel.org # 3.8.x
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-04-05 15:10:22 +02:00
Florian Fainelli
63c2b6812f MIPS: Fix code generation for non-DSP capable CPUs
Commit 32a7ede (MIPS: dsp: Add assembler support for DSP ASEs) has
enabled the use of DSP ASE specific instructions such as rddsp and wrdsp
under the idea that all code path that will make use of these two
instructions are properly checking for cpu_has_dsp to ensure that the
particular CPU we are running on *actually* supports DSP ASE.

This commit actually causes the following oops on QEMU Malta emulating a
MIPS 24Kc without the DSP ASE implemented:

[    7.960000] Reserved instruction in kernel
[    7.960000] Cpu 0
[    7.960000] $ 0   : 00000000 00000000 00000014 00000005
[    7.960000] $ 4   : 8fc2de48 00000001 00000000 8f59ddb0
[    7.960000] $ 8   : 8f5ceec4 00000018 00000c00 00800000
[    7.960000] $12   : 00000100 00000200 00000000 00457b84
[    7.960000] $16   : 00000000 8fc2ba78 8f4ec980 00000001
[    7.960000] $20   : 80418f90 00000000 00000000 000002dd
[    7.960000] $24   : 0000009c 7730d7b8
[    7.960000] $28   : 8f59c000 8f59dd38 00000001 80104248
[    7.960000] Hi    : 0000001d
[    7.960000] Lo    : 0000000b
[    7.960000] epc   : 801041ec thread_saved_pc+0x2c/0x38
[    7.960000]     Not tainted
[    7.960000] ra    : 80104248 get_wchan+0x48/0xac
[    7.960000] Status: 1000b703    KERNEL EXL IE
[    7.960000] Cause : 10800028
[    7.960000] PrId  : 00019300 (MIPS 24Kc)
[    7.960000] Modules linked in:
[    7.960000] Process killall (pid: 1574, threadinfo=8f59c000,
task=8fd14558, tls=773aa440)
[    7.960000] Stack : 8fc2ba78 8012b008 0000000c 0000001d 00000000
00000000 8f58a380
                  8f58a380 8fc2ba78 80202668 8f59de78 8f468600 8f59de28
801b2a3c 8f59df00 8f98ba20 74696e69
                  8f468600 8f59de28 801b7308 0081c007 00000000 00000000
00000000 00000000 00000000 00000000
                  00000000 8fc2bbb4 00000001 0000001d 0000000b 77f038cc
7fe80648 ffffffff ffffffff 00000000
                  00000001 0016e000 00000000 ...
[    7.960000] Call Trace:
[    7.960000] [<801041ec>] thread_saved_pc+0x2c/0x38
[    7.960000] [<80104248>] get_wchan+0x48/0xac

The disassembly of thread_saved_pc points to the following:
000006d0 <thread_saved_pc>:
 6d0:   8c820208        lw      v0,520(a0)
 6d4:   3c030000        lui     v1,0x0
 6d8:   24630000        addiu   v1,v1,0
 6dc:   10430008        beq     v0,v1,700 <thread_saved_pc+0x30>
 6e0:   00000000        nop
 6e4:   3c020000        lui     v0,0x0
 6e8:   8c43000c        lw      v1,12(v0)
 6ec:   04620004        bltzl   v1,700 <thread_saved_pc+0x30>
 6f0:   00001021        move    v0,zero
 6f4:   8c840200        lw      a0,512(a0)
 6f8:   00031080        sll     v0,v1,0x2
 6fc:   7c44100a        lwx     v0,a0(v0)   <------------
 700:   03e00008        jr      ra
 704:   00000000        nop

If we specifically disable -mdsp/-mdspr2 for arch/mips/kernel/process.o,
we get the following (non-crashing) assembly:

00000708 <thread_saved_pc>:
 708:   8c820208        lw      v0,520(a0)
 70c:   3c030000        lui     v1,0x0
 710:   24630000        addiu   v1,v1,0
 714:   10430009        beq     v0,v1,73c <thread_saved_pc+0x34>
 718:   00000000        nop
 71c:   3c020000        lui     v0,0x0
 720:   8c42000c        lw      v0,12(v0)
 724:   04420005        bltzl   v0,73c <thread_saved_pc+0x34>
 728:   00001021        move    v0,zero
 72c:   8c830200        lw      v1,512(a0)
 730:   00021080        sll     v0,v0,0x2
 734:   00431021        addu    v0,v0,v1
 738:   8c420000        lw      v0,0(v0)
 73c:   03e00008        jr      ra
 740:   00000000        nop

The specific line that leads a different assembly being produced is:

unsigned long thread_saved_pc(struct task_struct *tsk)
...
	return ((unsigned long *)t->reg29)[schedule_mfi.pc_offset]; <---

The problem here is that the compiler was given the right to use DSP
instructions with the -mdsp / -mdspr2 command-line switches and
performed some optimization for us and used DSP ASE instructions where
we are not checking that the running CPU actually supports DSP ASE.

This patch fixes the issue by partially reverting commit 32a7ede for
arch/mips/kernel/Makefile in order to remove the -mdsp / -mdspr2
compiler command-line switches such that we are now guaranteed that the
compiler will not optimize using DSP ASE reserved instructions. We also
need to fixup the rddsp/wrdsp and m{t,h}{hi,lo}{0,1,2,3} macros in
arch/mips/include/asm/mipsregs.h to tell the assembler that we are going
to explicitely use DSP ASE reserved instructions. The comment in
arch/mips/kernel/Makefile is also updated to reflect that.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: blogic@openwrt.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-03-19 19:15:35 +01:00
John Crispin
a4285b99e0 MIPS: Fix inconsistent formatting inside /proc/cpuinfo
There is a missing " " inside /proc/cpuinfo.

The bad commit was:
commit a96102be70
Author: Steven J. Hill <sjhill@mips.com>
Date:   Fri Dec 7 04:31:36 2012 +0000
MIPS: Add printing of ISA version in cpuinfo.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4988/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-03-13 23:08:36 +01:00
Yoichi Yuasa
9f91e5064c MIPS: VR4133: Fix probe for LL/SC.
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4963/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-03-12 18:57:52 +01:00
Ralf Baechle
63981a4096 MIPS: compat: Return same error ENOSYS as native for invalid operation.
The pains for multiplexed syscalls.

Noticed by Al Viro <viro@zeniv.linux.org.uk>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-03-11 16:34:50 +01:00
Linus Torvalds
14cc0b55b7 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal/compat fixes from Al Viro:
 "Fixes for several regressions introduced in the last signal.git pile,
  along with fixing bugs in truncate and ftruncate compat (on just about
  anything biarch at least one of those two had been done wrong)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  compat: restore timerfd settime and gettime compat syscalls
  [regression] braino in "sparc: convert to ksignal"
  fix compat truncate/ftruncate
  switch lseek to COMPAT_SYSCALL_DEFINE
  lseek() and truncate() on sparc really need sign extension
2013-03-02 08:34:06 -08:00
Linus Torvalds
aebb2afd54 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:

 o Add basic support for the Mediatek/Ralink Wireless SoC family.

 o The Qualcomm Atheros platform is extended by support for the new
   QCA955X SoC series as well as a bunch of patches that get the code
   ready for OF support.

 o Lantiq and BCM47XX platform have a few improvements and bug fixes.

 o MIPS has sent a few patches that get the kernel ready for the
   upcoming microMIPS support.

 o The rest of the series is made up of small bug fixes and cleanups
   that relate to various parts of the MIPS code.  The biggy in there is
   a whitespace cleanup.  After I was sent another set of whitespace
   cleanup patches I decided it was the time to clean the whitespace
   "issues" for once and and that touches many files below arch/mips/.

Fix up silly conflicts, mostly due to whitespace cleanups.

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (105 commits)
  MIPS: Quit exporting kernel internel break codes to uapi/asm/break.h
  MIPS: remove broken conditional inside vpe loader code
  MIPS: SMTC: fix implicit declaration of set_vi_handler
  MIPS: early_printk: drop __init annotations
  MIPS: Probe for and report hardware virtualization support.
  MIPS: ath79: add support for the Qualcomm Atheros AP136-010 board
  MIPS: ath79: add USB controller registration code for the QCA955X SoCs
  MIPS: ath79: add PCI controller registration code for the QCA955X SoCs
  MIPS: ath79: add WMAC registration code for the QCA955X SoCs
  MIPS: ath79: register UART for the QCA955X SoCs
  MIPS: ath79: add QCA955X specific glue to ath79_device_reset_{set, clear}
  MIPS: ath79: add GPIO setup code for the QCA955X SoCs
  MIPS: ath79: add IRQ handling code for the QCA955X SoCs
  MIPS: ath79: add clock setup code for the QCA955X SoCs
  MIPS: ath79: add SoC detection code for the QCA955X SoCs
  MIPS: ath79: add early printk support for the QCA955X SoCs
  MIPS: ath79: fix WMAC IRQ resource assignment
  mips: reserve elfcorehdr
  mips: Make sure kernel memory is in iomem
  MIPS: ath79: use dynamically allocated USB platform devices
  ...
2013-03-02 07:44:16 -08:00
Sasha Levin
b67bfe0d42 hlist: drop the node parameter from iterators
I'm not sure why, but the hlist for each entry iterators were conceived

        list_for_each_entry(pos, head, member)

The hlist ones were greedy and wanted an extra parameter:

        hlist_for_each_entry(tpos, pos, head, member)

Why did they need an extra pos parameter? I'm not quite sure. Not only
they don't really need it, it also prevents the iterator from looking
exactly like the list iterator, which is unfortunate.

Besides the semantic patch, there was some manual work required:

 - Fix up the actual hlist iterators in linux/list.h
 - Fix up the declaration of other iterators based on the hlist ones.
 - A very small amount of places were using the 'node' parameter, this
 was modified to use 'obj->member' instead.
 - Coccinelle didn't handle the hlist_for_each_entry_safe iterator
 properly, so those had to be fixed up manually.

The semantic patch which is mostly the work of Peter Senna Tschudin is here:

@@
iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;

type T;
expression a,c,d,e;
identifier b;
statement S;
@@

-T b;
    <+... when != b
(
hlist_for_each_entry(a,
- b,
c, d) S
|
hlist_for_each_entry_continue(a,
- b,
c) S
|
hlist_for_each_entry_from(a,
- b,
c) S
|
hlist_for_each_entry_rcu(a,
- b,
c, d) S
|
hlist_for_each_entry_rcu_bh(a,
- b,
c, d) S
|
hlist_for_each_entry_continue_rcu_bh(a,
- b,
c) S
|
for_each_busy_worker(a, c,
- b,
d) S
|
ax25_uid_for_each(a,
- b,
c) S
|
ax25_for_each(a,
- b,
c) S
|
inet_bind_bucket_for_each(a,
- b,
c) S
|
sctp_for_each_hentry(a,
- b,
c) S
|
sk_for_each(a,
- b,
c) S
|
sk_for_each_rcu(a,
- b,
c) S
|
sk_for_each_from
-(a, b)
+(a)
S
+ sk_for_each_from(a) S
|
sk_for_each_safe(a,
- b,
c, d) S
|
sk_for_each_bound(a,
- b,
c) S
|
hlist_for_each_entry_safe(a,
- b,
c, d, e) S
|
hlist_for_each_entry_continue_rcu(a,
- b,
c) S
|
nr_neigh_for_each(a,
- b,
c) S
|
nr_neigh_for_each_safe(a,
- b,
c, d) S
|
nr_node_for_each(a,
- b,
c) S
|
nr_node_for_each_safe(a,
- b,
c, d) S
|
- for_each_gfn_sp(a, c, d, b) S
+ for_each_gfn_sp(a, c, d) S
|
- for_each_gfn_indirect_valid_sp(a, c, d, b) S
+ for_each_gfn_indirect_valid_sp(a, c, d) S
|
for_each_host(a,
- b,
c) S
|
for_each_host_safe(a,
- b,
c, d) S
|
for_each_mesh_entry(a,
- b,
c, d) S
)
    ...+>

[akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
[akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: fix warnings]
[akpm@linux-foudnation.org: redo intrusive kvm changes]
Tested-by: Peter Senna Tschudin <peter.senna@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:24 -08:00
Linus Torvalds
d895cb1af1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile (part one) from Al Viro:
 "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
  locking violations, etc.

  The most visible changes here are death of FS_REVAL_DOT (replaced with
  "has ->d_weak_revalidate()") and a new helper getting from struct file
  to inode.  Some bits of preparation to xattr method interface changes.

  Misc patches by various people sent this cycle *and* ocfs2 fixes from
  several cycles ago that should've been upstream right then.

  PS: the next vfs pile will be xattr stuff."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
  saner proc_get_inode() calling conventions
  proc: avoid extra pde_put() in proc_fill_super()
  fs: change return values from -EACCES to -EPERM
  fs/exec.c: make bprm_mm_init() static
  ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
  ocfs2: fix possible use-after-free with AIO
  ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
  get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
  target: writev() on single-element vector is pointless
  export kernel_write(), convert open-coded instances
  fs: encode_fh: return FILEID_INVALID if invalid fid_type
  kill f_vfsmnt
  vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
  nfsd: handle vfs_getattr errors in acl protocol
  switch vfs_getattr() to struct path
  default SET_PERSONALITY() in linux/elf.h
  ceph: prepopulate inodes only when request is aborted
  d_hash_and_lookup(): export, switch open-coded instances
  9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
  9p: split dropping the acls from v9fs_set_create_acl()
  ...
2013-02-26 20:16:07 -08:00
Linus Torvalds
9043a2650c The sweeping change is to make add_taint() explicitly indicate whether to disable
lockdep, but it's a mechanical change.
 
 Cheers,
 Rusty.
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Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull module update from Rusty Russell:
 "The sweeping change is to make add_taint() explicitly indicate whether
  to disable lockdep, but it's a mechanical change."

* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  MODSIGN: Add option to not sign modules during modules_install
  MODSIGN: Add -s <signature> option to sign-file
  MODSIGN: Specify the hash algorithm on sign-file command line
  MODSIGN: Simplify Makefile with a Kconfig helper
  module: clean up load_module a little more.
  modpost: Ignore ARC specific non-alloc sections
  module: constify within_module_*
  taint: add explicit flag to show whether lock dep is still OK.
  module: printk message when module signature fail taints kernel.
2013-02-25 15:41:43 -08:00
Al Viro
3f6d078d4a fix compat truncate/ftruncate
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-25 09:24:55 -05:00
Linus Torvalds
9e2d59ad58 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal handling cleanups from Al Viro:
 "This is the first pile; another one will come a bit later and will
  contain SYSCALL_DEFINE-related patches.

   - a bunch of signal-related syscalls (both native and compat)
     unified.

   - a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
     (fixing several potential problems with missing argument
     validation, while we are at it)

   - a lot of now-pointless wrappers killed

   - a couple of architectures (cris and hexagon) forgot to save
     altstack settings into sigframe, even though they used the
     (uninitialized) values in sigreturn; fixed.

   - microblaze fixes for delivery of multiple signals arriving at once

   - saner set of helpers for signal delivery introduced, several
     architectures switched to using those."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
  x86: convert to ksignal
  sparc: convert to ksignal
  arm: switch to struct ksignal * passing
  alpha: pass k_sigaction and siginfo_t using ksignal pointer
  burying unused conditionals
  make do_sigaltstack() static
  arm64: switch to generic old sigaction() (compat-only)
  arm64: switch to generic compat rt_sigaction()
  arm64: switch compat to generic old sigsuspend
  arm64: switch to generic compat rt_sigqueueinfo()
  arm64: switch to generic compat rt_sigpending()
  arm64: switch to generic compat rt_sigprocmask()
  arm64: switch to generic sigaltstack
  sparc: switch to generic old sigsuspend
  sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
  sparc: kill sign-extending wrappers for native syscalls
  kill sparc32_open()
  sparc: switch to use of generic old sigaction
  sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
  mips: switch to generic sys_fork() and sys_clone()
  ...
2013-02-23 18:50:11 -08:00
Al Viro
496ad9aa8e new helper: file_inode(file)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:31 -05:00
Ralf Baechle
8bfc245f9a Merge branch 'mips-next-3.9' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next 2013-02-21 12:51:33 +01:00
John Crispin
535237ceca MIPS: remove broken conditional inside vpe loader code
The commit [1] breaks builds and results in the following error

	arch/mips/kernel/vpe.c: In function 'vpe_run':
	arch/mips/kernel/vpe.c:708:16: error: invalid type argument of '->' (have 'struct list_head')

Taking a closer look at the conditional we notice that list_first_entry wont
ever return NULL. The easiest fix is to just drop the dead code.

[1]
commit 3d2d032476
MIPS: vpe.c: Fix null pointer dereference in print arguments.

Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-19 09:36:40 +01:00
Florian Fainelli
df1cc3da21 MIPS: SMTC: fix implicit declaration of set_vi_handler
This patch fixes the following implicit declaration while building with
MIPS SMTC support enabled:

arch/mips/kernel/smtc.c: In function 'setup_cross_vpe_interrupts':
arch/mips/kernel/smtc.c:1205:2: error: implicit declaration of function
'set_vi_handler' [-Werror=implicit-function-declaration]
cc1: all warnings being treated as errors

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4931/
Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-19 09:36:39 +01:00
Aaro Koskinen
f7be4e754b MIPS: early_printk: drop __init annotations
We cannot use __init for earlyprintk code or data, since the kernel
parameter "keep_bootcon" allows leaving the boot console enabled.

Currently MIPS will crash/hang/die if you use keep_bootcon. The patch
fixes it at least on Lemote FuLoong mini-PC. Changes for other boards
were done based on what I could find with grep...

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Patchwork: http://patchwork.linux-mips.org/patch/4935/
Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-19 09:36:37 +01:00
David Daney
1e7decdb27 MIPS: Probe for and report hardware virtualization support.
The presence of the MIPS Virtualization Application-Specific Extension
is indicated by CP0_Config3[23].  Probe for this and report it in
/proc/cpuinfo.

Signed-off-by: David Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4904/
Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-19 09:36:36 +01:00
Corey Minyard
4893fc8856 mips: reserve elfcorehdr
/proc/vmcore wasn't showing up in kdump kernels.  It turns that that
for Octeon, the memory used by elfcorehdr wasn't being set aside
properly and it was getting clobbered before /proc/vmcore could get
it.  So reserve the memory if it shows up in a memory area managed
by the kernel.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Acked-by: David Daney  <ddaney@caviumnetworks.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/4936/
2013-02-19 09:36:23 +01:00
Corey Minyard
d3ff933802 mips: Make sure kernel memory is in iomem
Kernel memory isn't necessarily added to the memory tables, so it
wouldn't show up in /proc/iomem.  This was breaking kdump, which
requires these memory addresses to work correctly.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Acked-by: David Daney <ddaney@caviumnetworks.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/4937/
2013-02-19 09:36:15 +01:00
Gabor Juhos
0916b46962 MIPS: add irqdomain support for the CPU IRQ controller
Add code to load a irq_domain for the MIPS IRQ controller from a devicetree
file.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John Crispin <blogic@openwrt.org>
Acked-by: David Daney <david.daney@cavium.com>
Patchwork: http://patchwork.linux-mips.org/patch/4902/
2013-02-17 01:25:34 +01:00
Steven J. Hill
778eeb1b19 MIPS: Add new GIC clocksource.
Add new clocksource that uses the counter present on the MIPS
Global Interrupt Controller.

Signed-off-by: Steven J. Hill <sjhill@mips.com>
Patchwork: http://patchwork.linux-mips.org/patch/4681/
Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-17 01:25:21 +01:00
Steven J. Hill
32a7ede673 MIPS: dsp: Add assembler support for DSP ASEs.
Newer toolchains support the DSP and DSP Rev2 instructions. This patch
performs a check for that support and adds compiler and assembler
flags for only the files that need use those instructions.

Signed-off-by: Steven J. Hill <sjhill@mips.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4752/
Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-17 00:15:23 +01:00
Steven J. Hill
f8fa4811db MIPS: Add support for the M14KEc core.
Signed-off-by: Steven J. Hill <sjhill@mips.com>
Patchwork: http://patchwork.linux-mips.org/patch/4682/
Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-17 00:15:23 +01:00
John Crispin
42f3caef03 MIPS: show correct cpu name for 24KEc
Make sure 24KEc is properly identified inside /proc/cpuinfo

Signed-off-by: John Crispin <blogic@openwrt.org>
2013-02-17 00:15:16 +01:00
Steven J. Hill
a96102be70 MIPS: Add printing of ISA version in cpuinfo.
Display the MIPS ISA version release in the /proc/cpuinfo file.

[ralf@linux-mips.org: Add support for MIPS I ... IV legacy architecture
revisions.  Also differenciate between MIPS32 and MIPS64 versions instead
of lumping them together as just r1 and r2.

Note to application programmers: this indicates the CPU's ISA level
It does not imply the current execution environment does support it.  For
example an O32 application seeing "mips64r2" would still be restricted by
by the execution environment to 32-bit - but the kernel could run mips64r2
code.  The same for a 32-bit kernel running on a 64-bit processor.  This
field doesn't include ASEs or optional architecture modules nor other
detailed flags such as the availability of an FPU.]

Signed-off-by: Steven J. Hill <sjhill@mips.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/4714/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-15 23:07:38 +01:00
Julia Lawall
42913c7992 MIPS: Loongson2: Use clk API instead of direct dereferences
A struct clk value is intended to be an abstract pointer, so it should be
manipulated using the various API functions.

clk_put is additionally added on the failure paths.

The semantic match that finds the first problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e,e1;
identifier i;
@@

*e = clk_get(...)
 ... when != e = e1
     when any
*e->i
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: kernel-janitors@vger.kernel.org
Cc: linux-mips@linux-mips.org,
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/4751/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-15 23:07:37 +01:00
Al Viro
50150d2bb9 mips: switch to generic sys_fork() and sys_clone()
we still need the wrappers to store callee-saved registers in
pt_regs, but once that done we can jump to kernel/fork.c variants.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:33:02 -05:00
Al Viro
64b3122df4 mips: take the "zero newsp means inherit the parent's one" to copy_thread()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:33:01 -05:00
Al Viro
974fdb3c20 mips: no magic arguments for sysm_pipe()
current_pt_regs() works just fine

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:33:01 -05:00
Al Viro
5e392b8db7 mips: don't bother with compat_sys_futex() wrappers
... it's COMPAT_SYSCALL_DEFINE now

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:33:01 -05:00
Al Viro
aa584802e5 mips: switch to generic compat rt_sigaction()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:33:00 -05:00
Al Viro
0450d22f4b mips: switch to generic compat sched_rr_get_interval()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:33:00 -05:00
Al Viro
1910f4ab77 mips: sigsuspend() is essentially the same as rt_sigsuspend() here
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:32:59 -05:00
Al Viro
ea5d83db67 mips: switch to generic compat rt_sigqueueinfo()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:32:59 -05:00
Al Viro
45cb66f797 mips: switch to generic compat rt_sigpending()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:32:59 -05:00
Al Viro
056a060803 mips: switch to generic compat rt_sigprocmask()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:32:58 -05:00
Al Viro
bde208d2e1 switch mips to generic rt_sigsuspend(), make it unconditional
mips was the last architecture not using the generic variant.
Both native and compat variants switched to generic, which is
made unconditional now.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:32:49 -05:00
Al Viro
1c37ea8277 mips: switch to compat_sys_waitid()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:32:24 -05:00
Al Viro
ea536ad4f2 mips: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:32:24 -05:00
Al Viro
c6489c147d Merge commit '12890d0f61fc' into arch-mips 2013-02-03 18:16:33 -05:00
Al Viro
709410a03e mips: use sane prototype for sys_rt_sigsuspend()
we want to do that before branchpoint for arch-* to be able to
consolidate sys_rt_sigsuspend() declarations.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-03 18:14:17 -05:00
Ralf Baechle
7034228792 MIPS: Whitespace cleanup.
Having received another series of whitespace patches I decided to do this
once and for all rather than dealing with this kind of patches trickling
in forever.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-01 10:00:22 +01:00
Steven J. Hill
b9688310d7 MIPS: Whitespace cleanups and reformatting.
Signed-off-by: Steven J. Hill <sjhill@mips.com>
Cc: linux-mips@linux-mips.org
Cc: Steven J. Hill <sjhill@mips.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/4781/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-01 10:00:20 +01:00
Ralf Baechle
bc4f297554 MIPS: sysmips: Rewrite to use SYSCALL_DEFINE3().
Thanks to current_pt_regs() there is no need to use the dark MIPS magic.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-01 10:00:20 +01:00
Ralf Baechle
33722a2e73 MIPS: sysmips: Use unreachable().
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-01 10:00:20 +01:00
Al Cooper
58b69401c7 MIPS: Function tracer: Fix broken function tracing
Function tracing is currently broken for all 32 bit MIPS platforms.
When tracing is enabled, the kernel immediately hangs on boot.
This is a result of commit b732d439cb
that changes the kernel/trace/Kconfig file so that is no longer
forces FRAME_POINTER when FUNCTION_TRACING is enabled.

MIPS frame pointers are generally considered to be useless because
they cannot be used to unwind the stack. Unfortunately the MIPS
function tracing code has bugs that are masked by the use of frame
pointers. This commit fixes the bugs so that MIPS frame pointers
don't need to be enabled.

The bugs are a result of the odd calling sequence used to call the trace
routine. This calling sequence is inserted into every traceable function
when the tracing CONFIG option is enabled. This sequence is generated
for 32bit MIPS platforms by the compiler via the "-pg" flag.

Part of the sequence is "addiu sp,sp,-8" in the delay slot after every
call to the trace routine "_mcount" (some legacy thing where 2 arguments
used to be pushed on the stack). The _mcount routine is expected to
adjust the sp by +8 before returning.  So when not disabled, the original
jalr and addiu will be there, so _mcount has to adjust sp.

The problem is that when tracing is disabled for a function, the
"jalr _mcount" instruction is replaced with a nop, but the
"addiu sp,sp,-8" is still executed and the stack pointer is left
trashed. When frame pointers are enabled the problem is masked
because any access to the stack is done through the frame
pointer and the stack pointer is restored from the frame pointer when
the function returns.

This patch writes two nops starting at the address of the "jalr _mcount"
instruction whenever tracing is disabled. This means that the
"addiu sp,sp.-8" will be converted to a nop along with the "jalr".  When
disabled, there will be two nops.

This is SMP safe because the first time this happens is during
ftrace_init() which is before any other processor has been started.
Subsequent calls to enable/disable tracing when other CPUs ARE running
will still be safe because the enable will only change the first nop
to a "jalr" and the disable, while writing 2 nops, will only be changing
the "jalr". This patch also stops using stop_machine() to call the
tracer enable/disable routines and calls them directly because the
routines are SMP safe.

When the kernel first boots we have to be able to handle the gcc
generated jalr, addui sequence until ftrace_init gets a chance to run
and change the sequence. At this point mcount just adjusts the stack
and returns. When ftrace_init runs, we convert the jalr/addui to nops.
Then whenever tracing is enabled we convert the first nop to a "jalr
mcount+8". The mcount+8 entry point skips the stack adjust.

[ralf@linux-mips.org: Folded in  Steven Rostedt's build fix.]

Signed-off-by: Al Cooper <alcooperx@gmail.com>
Cc: rostedt@goodmis.org
Cc: ddaney.cavm@gmail.com
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/4806/
Patchwork: https://patchwork.linux-mips.org/patch/4841/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-31 15:28:48 +01:00