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| * sparc64: Fix trailing whitespace in NG4 memcpy.David S. Miller2012-09-28
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * sparc64: Fix comment type in NG4 copy from user.David S. Miller2012-09-27
| | | | | | | | | | | | Noticed by Greg Onufer. Signed-off-by: David S. Miller <davem@davemloft.net>
| * sparc64: Add SPARC-T4 optimized memcpy.David S. Miller2012-09-27
| | | | | | | | | | | | | | | | | | | | | | | | | | Before After -------------- -------------- bw_tcp: 1288.53 MB/sec 1637.77 MB/sec bw_pipe: 1517.18 MB/sec 2107.61 MB/sec bw_unix: 1838.38 MB/sec 2640.91 MB/sec make -s -j128 allmodconfig 5min 49sec 5min 31sec Signed-off-by: David S. Miller <davem@davemloft.net>
| * sparc64: Add SHA1 driver making use of the 'sha1' instruction.David S. Miller2012-08-20
| | | | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
* | sparc64: Fix return value of Niagara-2 memcpy.David S. Miller2012-09-27
|/ | | | | | | | | It gets clobbered by the kernel's VISEntryHalf, so we have to save it in a different register than the set clobbered by that macro. The instance in glibc is OK and doesn't have this problem. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Consistently use fsrc2 rather than fmovd in optimized asm.David S. Miller2012-06-27
| | | | | | Because fsrc2, unlike fmovd, does not update the %fsr register. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: use the new generic strnlen_user() functionDavid Miller2012-05-26
| | | | | | | This throws away the sparc-specific functions in favor of the generic optimized version. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib: Sparc's strncpy_from_user is generic enough, move under lib/David S. Miller2012-05-24
| | | | | | | | | | | | | | To use this, an architecture simply needs to: 1) Provide a user_addr_max() implementation via asm/uaccess.h 2) Add "select GENERIC_STRNCPY_FROM_USER" to their arch Kcnfig 3) Remove the existing strncpy_from_user() implementation and symbol exports their architecture had. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: David Howells <dhowells@redhat.com>
* kernel: Move REPEAT_BYTE definition into linux/kernel.hDavid S. Miller2012-05-24
| | | | | | | And make sure that everything using it explicitly includes that header file. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Increase portability of strncpy_from_user() implementation.David S. Miller2012-05-24
| | | | | | | | | | | | | | Hide details of maximum user address calculation in a new asm/uaccess.h interface named user_addr_max(). Provide little-endian implementation in find_zero(), which should work but can probably be improved. Abstrace alignment check behind IS_UNALIGNED() macro. Kill double-semicolon, noticed by David Howells. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Optimize strncpy_from_user() zero byte search.David S. Miller2012-05-23
| | | | | | | | | | | | | | | Compute a mask that will only have 0x80 in the bytes which had a zero in them. The formula is: ~(((x & 0x7f7f7f7f) + 0x7f7f7f7f) | x | 0x7f7f7f7f) In the inner word iteration, we have to compute the "x | 0x7f7f7f7f" part, so we can reuse that in the above calculation. Once we have this mask, we perform divide and conquer to find the highest 0x80 location. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Add full proper error handling to strncpy_from_user().David S. Miller2012-05-23
| | | | | | | | | | | | Linus removed the end-of-address-space hackery from fs/namei.c:do_getname() so we really have to validate these edge conditions and cannot cheat any more (as x86 used to as well). Move to a common C implementation like x86 did. And if both src and dst are sufficiently aligned we'll do word at a time copies and checks as well. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc32: Add ucmpdi2.o to obj-y instead of lib-y.David S. Miller2012-05-19
| | | | | | | Otherwise if no references exist in the static kernel image, we won't export the symbol properly to modules. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc32: add ucmpdi2Sam Ravnborg2012-05-19
| | | | | | | | | | | | | | Based on copy from microblaze add ucmpdi2 implementation. This fixes build of niu driver which failed with: drivers/built-in.o: In function `niu_get_nfc': niu.c:(.text+0x91494): undefined reference to `__ucmpdi2' This driver will never be used on a sparc32 system, but patch added to fix build breakage with all*config builds. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc32: Kill off software 32-bit multiply/divide routines.David S. Miller2012-05-15
| | | | | | | | | | | | | For the explicit calls to .udiv/.umul in assembler, I made a mechanical (read as: safe) transformation. I didn't attempt to make any simplifications. In particular, __ndelay and __udelay can be simplified significantly. Some of the %y reads are unnecessary and these routines have no need any longer for allocating a register window, they can be leaf functions. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc32: Kill btfixup for xchg()'s 'swap' instruction.David S. Miller2012-05-13
| | | | | | | | | | We always have this instruction available, so no need to use btfixup for it any more. This also eradicates the whole of atomic_32.S and thus the __atomic_begin and __atomic_end symbols completely. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Convert some assembler over to linakge.h's ENTRY/ENDPROCDavid S. Miller2012-05-11
| | | | | | Use those, instead of doing it all by hand. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc32: Remove inline strncmp "optimization" for constant counts.David S. Miller2012-05-11
| | | | | | Let the compiler do stuff like this. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc32: drop sun4c specific ___xchg32 implementationSam Ravnborg2012-05-11
| | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* lib: Fix multiple definitions of clz_tabDavid Miller2012-02-01
| | | | | | | | | | | | Both sparc 32-bit's software divide assembler and MPILIB provide clz_tab[] with identical contents. Break it out into a seperate object file and select it when SPARC32 or MPILIB is set. Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: James Morris <jmorris@namei.org>
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds2012-01-10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lib: use generic pci_iomap on all architectures Many architectures don't want to pull in iomap.c, so they ended up duplicating pci_iomap from that file. That function isn't trivial, and we are going to modify it https://lkml.org/lkml/2011/11/14/183 so the duplication hurts. This reduces the scope of the problem significantly, by moving pci_iomap to a separate file and referencing that from all architectures. * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: alpha: drop pci_iomap/pci_iounmap from pci-noop.c mn10300: switch to GENERIC_PCI_IOMAP mn10300: add missing __iomap markers frv: switch to GENERIC_PCI_IOMAP tile: switch to GENERIC_PCI_IOMAP tile: don't panic on iomap sparc: switch to GENERIC_PCI_IOMAP sh: switch to GENERIC_PCI_IOMAP powerpc: switch to GENERIC_PCI_IOMAP parisc: switch to GENERIC_PCI_IOMAP mips: switch to GENERIC_PCI_IOMAP microblaze: switch to GENERIC_PCI_IOMAP arm: switch to GENERIC_PCI_IOMAP alpha: switch to GENERIC_PCI_IOMAP lib: add GENERIC_PCI_IOMAP lib: move GENERIC_IOMAP to lib/Kconfig Fix up trivial conflicts due to changes nearby in arch/{m68k,score}/Kconfig
| * sparc: switch to GENERIC_PCI_IOMAPMichael S. Tsirkin2011-12-04
| | | | | | | | | | | | | | | | sparc copied pci_iomap from generic code, probably to avoid pulling the rest of iomap.c in. Since that's in a separate file now, we can reuse the common implementation. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* | sparc32: drop unused atomic24 supportSam Ravnborg2011-12-27
|/ | | | | | | atomic24 support was used to semaphores in the past - but is no longer used. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc32: Correct the return value of memcpy.David S. Miller2011-10-20
| | | | | | | Properly return the original destination buffer pointer. Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Kjetil Oftedal <oftedal@gmail.com>
* sparc32: Remove uses of %g7 in memcpy implementation.David S. Miller2011-10-20
| | | | | | | | | This is setting things up so that we can correct the return value, so that it properly returns the original destination buffer pointer. Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Kjetil Oftedal <oftedal@gmail.com>
* sparc32: Remove non-kernel code from memcpy implementation.David S. Miller2011-10-20
| | | | | Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Kjetil Oftedal <oftedal@gmail.com>
* sparc: Fix __atomic_add_unless() return value.Josip Rodin2011-08-04
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Use popc when possible for ffs/__ffs/ffz.David S. Miller2011-08-03
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Use popc if possible for hweight routines.David S. Miller2011-08-03
| | | | | | Just like powerpc, we code patch at boot time. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Minor tweaks to Niagara page copy/clear.David S. Miller2011-08-03
| | | | | | | | | | Don't use floating point on Niagara2, use the traditional plain Niagara code instead. Unroll Niagara loops to 128 bytes for copy, and 256 bytes for clear. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: rename atomic_add_unlessStephen Rothwell2011-07-27
| | | | | | | | | | | | Should have been done in commit 1af08a1407f4 ("This is in preparation for more generic atomic"). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Arun Sharma <asharma@fb.com> Cc: David Miller <davem@davemloft.net> Cc: "Hans-Christian Egtvedt" <hans-christian.egtvedt@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* atomic: use <linux/atomic.h>Arun Sharma2011-07-26
| | | | | | | | | | | | | | This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'master' of ↵David S. Miller2011-05-20
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
| * sparc32: Fixed unaligned memory copying in function ↵Tkhai Kirill2011-05-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | __csum_partial_copy_sparc_generic When we are in the label cc_dword_align, registers %o0 and %o1 have the same last 2 bits, but it's not guaranteed one of them is zero. So we can get unaligned memory access in label ccte. Example of parameters which lead to this: %o0=0x7ff183e9, %o1=0x8e709e7d, %g1=3 With the parameters I had a memory corruption, when the additional 5 bytes were rewritten. This patch corrects the error. One comment to the patch. We don't care about the third bit in %o1, because cc_end_cruft stores word or less. Signed-off-by: Tkhai Kirill <tkhai@yandex.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: removed unused code, implemented by generic codeDaniel Hellstrom2011-04-21
|/ | | | | Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'core-locking-for-linus' of ↵Linus Torvalds2011-03-15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rtmutex: tester: Remove the remaining BKL leftovers lockdep/timers: Explain in detail the locking problems del_timer_sync() may cause rtmutex: Simplify PI algorithm and make highest prio task get lock rwsem: Remove redundant asmregparm annotation rwsem: Move duplicate function prototypes to linux/rwsem.h rwsem: Unify the duplicate rwsem_is_locked() inlines rwsem: Move duplicate init macros and functions to linux/rwsem.h rwsem: Move duplicate struct rwsem declaration to linux/rwsem.h x86: Cleanup rwsem_count_t typedef rwsem: Cleanup includes locking: Remove deprecated lock initializers cred: Replace deprecated spinlock initialization kthread: Replace deprecated spinlock initialization xtensa: Replace deprecated spinlock initialization um: Replace deprecated spinlock initialization sparc: Replace deprecated spinlock initialization mips: Replace deprecated spinlock initialization cris: Replace deprecated spinlock initialization alpha: Replace deprecated spinlock initialization rtmutex-tester: Remove BKL tests
| * sparc: Replace deprecated spinlock initializationThomas Gleixner2011-01-27
| | | | | | | | | | | | | | | | SPIN_LOCK_UNLOCK is deprecated. Use the lockdep capable variant instead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: David S. Miller <davem@davemloft.net>
* | sparc: use bitmap_set()Akinobu Mita2011-02-09
|/ | | | | | | | | Use bitmap_set() instead of calling __set_bit() each bit. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Make lock backoff really a NOP on UP builds.David S. Miller2010-08-19
| | | | | | | | | | | As noticed by Mikulas Patocka, the backoff macros don't completely nop out for UP builds, we still get a branch always and a delay slot nop. Fix this by making the branch to the backoff spin loop selective, then we can nop out the spin loop completely. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: simple microoptimizations for atomic functionsMikulas Patocka2010-08-19
| | | | | | | | | Simple microoptimizations for sparc64 atomic functions: Save one instruction by using a delay slot. Use %g1 instead of %g7, because %g1 is written earlier. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Make rwsems 64-bit.David S. Miller2010-08-18
| | | | | | | | | | | | | | | | | | | | Basically tip-off the powerpc code, use a 64-bit type and atomic64_t interfaces for the implementation. This gets us off of the by-hand asm code I wrote, which frankly I think probably ruins I-cache hit rates. The idea was the keep the call chains less deep, but anything taking the rw-semaphores probably is also calling other stuff and therefore already has allocated a stack-frame. So no real stack frame savings ever. Ben H. has posted patches to make powerpc use 64-bit too and with some abstractions we can probably use a shared header file somewhere. With suggestions from Sam Ravnborg. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Allocate sufficient stack space in ftrace stubs.David S. Miller2010-04-13
| | | | | | | | | | | | | 128 bytes is sufficient for the register window save area, but the calling conventions allow the callee to save up to 6 incoming argument registers into the stack frame after the register window save area. This means a minimal stack frame is 176 bytes (128 + (6 * 8)). This fixes random crashes when using the function tracer. Reported-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Add function graph tracer support.David S. Miller2010-04-13
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Give a stack frame to the ftrace call sites.David S. Miller2010-04-13
| | | | | | | | | | | It's the only way we'll be able to implement the function graph tracer properly. A positive is that we no longer have to worry about the linker over-optimizing the tail call, since we don't use a tail call any more. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Kill CONFIG_STACK_DEBUG code.David S. Miller2010-04-13
| | | | | | The generic stack tracer does this job just as well. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Add HAVE_FUNCTION_TRACE_MCOUNT_TEST and tidy up.David S. Miller2010-04-13
| | | | | | | | | | | | | | Check function_trace_stop at ftrace_caller Toss mcount_call and dummy call of ftrace_stub, unnecessary. Document problems we'll have if the final kernel image link ever turns on relaxation. Properly size 'ftrace_call' so it looks right when inspecting instructions under gdb et al. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Stop trying to be so fancy and use __builtin_{memcpy,memset}()David S. Miller2009-12-11
| | | | | | | This mirrors commit ff60fab71bb3b4fdbf8caf57ff3739ffd0887396 (x86: Use __builtin_memset and __builtin_memcpy for memset/memcpy) Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: Use __builtin_object_size() to validate the buffer size for ↵David S. Miller2009-12-11
| | | | | | | | | copy_from_user() This mirrors x86 commit 9f0cf4adb6aa0bfccf675c938124e68f7f06349d (x86: Use __builtin_object_size() to validate the buffer size for copy_from_user()) Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Fix stack debugging IRQ stack regression.David S. Miller2009-12-09
| | | | | | | | | | | | | Commit 4f70f7a91bffdcc39f088748dc678953eb9a3fbd (sparc64: Implement IRQ stacks.) has two bugs. First, the softirq range check forgets to subtract STACK_BIAS before comparing with %sp. Next, on failure the wrong label is jumped to, resulting in a bogus stack being loaded. Reported-by: Igor Kovalenko <igor.v.kovalenko@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Fix section attribute warnings.David S. Miller2009-05-29
| | | | | | | CSUM copy to/from user assembler was missing allocatable and executable attributes for .fixup Signed-off-by: David S. Miller <davem@davemloft.net>
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