Skip to content

cloud-kernel
cloud-kernel

openanolis / cloud-kernel
1 年多 前同步成功

通知 160
Star 36
Fork 7
cloud-kernel
cloud-kernel
切换分支/标签
  1. 07 10月, 2016 6 次提交
  3. 03 10月, 2016 1 次提交
  5. 02 10月, 2016 1 次提交
    • P
      MIPS: CM: Fix mips_cm_max_vp_width for non-MT kernels on MT systems · 6605d156
      由 Paul Burton 提交于 
      When discovering the number of VPEs per core, smp_num_siblings will be
incorrect for kernels built without support for the MIPS MultiThreading
(MT) ASE running on systems which implement said ASE. This leads to
accesses to VPEs in secondary cores being performed incorrectly since
mips_cm_vp_id calculates the wrong ID to write to the local "other"
registers. Fix this by examining the number of VPEs in the core as
reported by the CM.

This patch presumes that the number of VPEs will be the same in each
core of the system. As this path only applies to systems with CM version
2.5 or lower, and this property is true of all such known systems, this
is likely to be fine but is described in a comment for good measure.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14338/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      6605d156
  7. 01 10月, 2016 19 次提交
    • V
      ARC: [plat*] enables MODULE* · ef25bacb
      由 Vineet Gupta 提交于 
      Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      ef25bacb
    • V
      ARCv2: fix local_save_flags · cd5d38b0
      由 Vineet Gupta 提交于 
      Commit d9676fa1 ("ARCv2: Enable LOCKDEP"), changed
local_save_flags() to not return raw STATUS32 but encoded in the form
such that it could be fed directly to CLRI/SETI instructions.
However the STATUS32.E[] was not captured correctly as it corresponds to
bits [4:1] in the register and not [3:0]

Fixes: d9676fa1 ("ARCv2: Enable LOCKDEP")
Cc: Evgeny Voevodin <evgeny.voevodin@intel.com>
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      cd5d38b0
    • N
      ARC: CONFIG_NODES_SHIFT fix default values · 3528f84f
      由 Noam Camus 提交于 
      Seem like values assigned as absolute number and not and
shift value, i.e. should be 0 for one node (2^0) and 1 for
couple of nodes (2^1)
Signed-off-by: NNoam Camus <noamca@mellanox.com>
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      3528f84f
    • Y
      ARCv2: intc: Use kflag if STATUS32.IE must be reset · bc0c7ece
      由 Yuriy Kolerov 提交于 
      In the end of "arc_init_IRQ" STATUS32.IE flag is going to be affected by
"flag" instruction but "flag" never touches IE flag on ARCv2. So "kflag"
instruction must be used instead of "flag".
Signed-off-by: NYuriy Kolerov <yuriy.kolerov@synopsys.com>
Cc: stable@vger.kernel.org #4.2+
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      bc0c7ece
    • V
      ARC: .exit.* sections can be discarded in .eh_frame regime · 99a2ca65
      由 Vineet Gupta 提交于 
      We used to keep the .exit.* sections as linker would fail in final link
due to references from .debug_frame which itself could not be discardrd
due to the forced "write,alloc" attributes for it.

|   LD      init/built-in.o
| `.exit.text' referenced in section `.debug_frame' of arch/arc/built-in.o: defined in discarded section `.exit.text' of arch/arc/built-in.o
| Makefile:949: recipe for target 'vmlinux' failed

With .debug_frame now retired, this hack is no longer needed.
kernel binary is now a little bit smaller as well.

closes STAR 9000549913
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      99a2ca65
    • V
      ARC: dw2 unwind: enable cfi pseudo ops in string lib · 86effd0d
      由 Vineet Gupta 提交于 
      This uses a new set of annoations viz. ENTRY_CFI/END_CFI to enabel cfi
ops generation.

Note that we didn't change the normal ENTRY/EXIT as we don't actually
want unwind info in the trap/exception/interrutp handlers which use
these, as unwinder then gets confused (it keeps recursing vs. stopping).
Semantically these are leaf routines and unwinding should stop when it
hits those routines.

Before
------

    28.52%     1.19%          9929  hackbench  libuClibc-1.0.17.so   [.] __write_nocancel
            |
            ---__write_nocancel
               |--8.95%--EV_Trap
               |           --8.25%--sys_write
               |                     |--3.93%--sock_write_iter
     ...
               |--2.62%--memset   <==== [LEAF entry as no unwind info]
                         ^^^^^^

After
-----

    29.46%     1.24%         13622  hackbench  libuClibc-1.0.17.so   [.] __write_nocancel
            |
            ---__write_nocancel
               |--9.31%--EV_Trap
               |           --8.62%--sys_write
               |                     |--4.17%--sock_write_iter
     ...
               |--6.19%--sys_write
               |           --6.19%--sock_write_iter
               |                     unix_stream_sendmsg
               |                     |--1.62%--sock_alloc_send_pskb
               |                     |--0.89%--sock_def_readable
               |                     |--0.88%--_raw_spin_unlock_irqrestore
               |                     |--0.69%--memset
               |                     |         ^^^^^^     <==== [now in proper callframe]
               |                     |
               |                      --0.52%--skb_copy_datagram_from_iter
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      86effd0d
    • V
      ARC: dw2 unwind: add infrastructure for adding cfi pseudo ops to asm · 5a205a32
      由 Vineet Gupta 提交于 
      1. detect whether binutils supports the cfi pseudo ops
2. define conditional macros to generate the ops
3. define new ENTRY_CFI/END_CFI to annotate hand asm code.
   - Needed because we don't want to emit dwarf info in general ENTRY/END
     used by lowest level trap/exception/interrutp handlers as unwinder
     gets confused trying to unwind out of them. We want unwinder to
     instead stop when it hits onfo those routines
   - These provide minimal start/end cfi ops assuming routine doesn't
     touch stack memory/regs
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      5a205a32
    • V
      ARC: entry: make ret_from_system_call local label · 2dad1122
      由 Vineet Gupta 提交于 
      This essentially removes ENTRY() assembler annotation for this symbol
since it didn't have a pairing END()

This in ahead of introducing cfi pseudo ops in ENTRY/END which expects
paired cfi_startproc/cfi_endproc

| ../arch/arc/kernel/entry.S: Assembler messages:
| ../arch/arc/kernel/entry.S:270: Error: previous CFI entry not closed (missing .cfi_endproc)
| ../scripts/Makefile.build:326: recipe for target 'arch/arc/kernel/entry-arcv2.o' failed
| make[4]: *** [arch/arc/kernel/entry-arcv2.o] Error 1
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      2dad1122
    • V
      ARC: dw2 unwind: don't force dwarf 2 · 2d048642
      由 Vineet Gupta 提交于 
      In .debug_frame based unwinding regime, we used to force -gdwarf-2 since
kernel unwinder only claimed to handle dwarf 2. This changed since commit
6d0d5060 ("ARC: dw2 unwind: Don't bail for CIE.version != 1")
which added some support beyond dwarf 2, atleast to handle CIE != 1

The ill-effect of -gdwarf-2 is that it forces generation of .debug_*
sections, which bloats loadable modules .ko files. For the curious, this
doesn't affect vmlinx binary since linker script discards .debug_* but
same discard is not yet implemented for modules.

So it seems we can drop the -gdwarf-2 toggle, which should not be needed
anyways given that we now use .eh_frame based unwinding.

I've verified using GNU 2016.09-engo10 that the actual unwind info is
not different with or w/o this toggle - but the debug_* sections are
gone for good.

before
-----
arc-linux-readelf -S q_proc.ko-unwinding-1-eh_frame-switch | grep debug
  [15] .debug_info       PROGBITS        00000000 000300 00d08d 00 	0   0  1
  [16] .rela.debug_info  RELA            00000000 0162a0 008844 0c   I 29  15  4
  [17] .debug_abbrev     PROGBITS        00000000 00d38d 0005f8 00 	0   0  1
  [18] .debug_loc        PROGBITS        00000000 00d985 000070 00 	0   0  1
  [19] .rela.debug_loc   RELA            00000000 01eae4 0000c0 0c   I 29  18  4
  [20] .debug_aranges    PROGBITS        00000000 00d9f5 000040 00 	0   0  1
  [21] .rela.debug_arang RELA            00000000 01eba4 000030 0c   I 29  20  4
  [22] .debug_ranges     PROGBITS        00000000 00da35 000018 00 	0   0  1
  [23] .rela.debug_range RELA            00000000 01ebd4 000030 0c   I 29  22  4
  [24] .debug_line       PROGBITS        00000000 00da4d 000b5b 00 	0   0  1
  [25] .rela.debug_line  RELA            00000000 01ec04 0000cc 0c   I 29  24  4
  [26] .debug_str        PROGBITS        00000000 00e5a8 007831 01   MS 0   0  1

after
----
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      2d048642
    • V
      ARC: dw2 unwind: switch to .eh_frame based unwinding · 6716dbbd
      由 Vineet Gupta 提交于 
      So finally after almost 8 years of dealing with .debug_frame, we are
finally switching to .eh_frame. The reason being stripped kernel
binaries had non-functional unwinder as .debug_frame was gone.
Also, in general .eh_frame seems more common way of doing unwinding.

This also folds a revert of f52e126c ("ARC: unwind: ensure that
.debug_frame is generated (vs. .eh_frame)") to ensure that we start
getting .eh_frame
Reported-by: NDaniel Mentz <danielmentz@google.com>
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      6716dbbd
    • V
      ARC: dw2 unwind: factor CIE specifics for .eh_frame/.debug_frame · d040876b
      由 Vineet Gupta 提交于 
      This paves way for switching to .eh_frame based unwindiing
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      d040876b
    • V
      ARC: module: support R_ARC_32_PCREL relocation · 94f4fb08
      由 Vineet Gupta 提交于 
      Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      94f4fb08
    • A
      arc: perf: Enable generic "cache-references" and "cache-misses" events · e0d5321f
      由 Alexey Brodkin 提交于 
      We used to live with PERF_COUNT_HW_CACHE_REFERENCES and
PERF_COUNT_HW_CACHE_REFERENCES not specified on ARC.

Those events are actually aliases to 2 cache events that we do support
and so this change sets "cache-reference" and "cache-misses" events
in the same way as "L1-dcache-loads" and L1-dcache-load-misses.

And while at it adding debug info for cache events as well as doing a
subtle fix in HW events debug info - config value is much better
represented by hex so we may see not only event index but as well other
control bits set (if they exist).
Signed-off-by: NAlexey Brodkin <abrodkin@synopsys.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      e0d5321f
    • N
      ARC: [plat-eznps] add missing atomic_fetch_xxx operations · ce0f4932
      由 Noam Camus 提交于 
      Build brekeage since last changes to generic atomic operations.
Added couple of missing macros which are now mandatory
Signed-off-by: NNoam Camus <noamca@mellanox.com>
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      ce0f4932
    • V
      ARCv2: Implement atomic64 based on LLOCKD/SCONDD instructions · ce636527
      由 Vineet Gupta 提交于 
      ARCv2 ISA provides 64-bit exclusive load/stores so use them to implement
the 64-bit atomics and elide the spinlock based generic 64-bit atomics

boot tested with atomic64 self-test (and GOD bless the person who wrote
them, I realized my inline assmebly is sloppy as hell)

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      ce636527
    • V
      ARCv2: Support dynamic peripheral address space in HS38 rel 3.0 cores · 26c01c49
      由 Vineet Gupta 提交于 
      HS release 3.0 provides for even more flexibility in specifying the
volatile address space for mapping peripherals.

With HS 2.1 @start was made flexible / programmable - with HS 3.0 even
@end can be setup (vs. fixed to 0xFFFF_FFFF before).

So add code to reflect that and while at it remove an unused struct
defintion
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      26c01c49
    • V
      ARCv2: identify HS38 rel 3.0 cores · f5076846
      由 Vineet Gupta 提交于 
      Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      f5076846
    • V
      ARCv2: Add support for ZeBu Emulation platform for HS cores · 9efac679
      由 Vineet Gupta 提交于 
      The cool thing is that same kernel image can run on
 - nsim OSCI simulation platform
 - SDPlite FPGA setups
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      9efac679
    • A
      arc: Add "model" properly in device tree description of all boards · 618a9cd0
      由 Alexey Brodkin 提交于 
      As it was discussed quite some time ago (see
https://lkml.org/lkml/2015/11/5/862) it's a good practice to add
"model" property in .dts. Moreover as per ePAPR "model" property is
required and should look like "manufacturer,model" so we do here.
Signed-off-by: NAlexey Brodkin <abrodkin@synopsys.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Jonas Gorski <jonas.gorski@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Christian Ruppert <christian.ruppert@alitech.com>
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
      618a9cd0
  9. 30 9月, 2016 13 次提交