- 09 6月, 2006 15 次提交
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由 Michael Ellerman 提交于
Currently the hvc_rtas driver is painfully slow to use. Our "benchmark" is ls -R /etc, which spits out about 27866 characters. The theoretical maximum speed would be about 2.2 seconds, the current code takes ~50 seconds. The core of the problem is that sometimes when the tty layer asks us to push characters the firmware isn't able to handle some or all of them, and so returns an error. The current code sees this and just returns to the tty code with the buffer half sent. The khvcd thread will eventually wake up and try to push more characters, which will usually work because by then the firmware's had time to make room. But the khvcd thread only wakes up every 10 milliseconds, which isn't fast enough. So change the khvcd thread logic so that if there's an incomplete write we yield() and then immediately try writing again. Doing so makes POLL_QUICK and POLL_WRITE synonymous, so remove POLL_QUICK. With this patch our "benchmark" takes ~2.8 seconds. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Paul Mackerras 提交于
This gives the ability to control whether alignment exceptions get fixed up or reported to the process as a SIGBUS, using the existing PR_SET_UNALIGN and PR_GET_UNALIGN prctls. We do not implement the option of logging a message on alignment exceptions. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Paul Mackerras 提交于
This adds the PowerPC part of the code to allow processes to change their endian mode via prctl. This also extends the alignment exception handler to be able to fix up alignment exceptions that occur in little-endian mode, both for "PowerPC" little-endian and true little-endian. We always enter signal handlers in big-endian mode -- the support for little-endian mode does not amount to the creation of a little-endian user/kernel ABI. If the signal handler returns, the endian mode is restored to what it was when the signal was delivered. We have two new kernel CPU feature bits, one for PPC little-endian and one for true little-endian. Most of the classic 32-bit processors support PPC little-endian, and this is reflected in the CPU feature table. There are two corresponding feature bits reported to userland in the AT_HWCAP aux vector entry. This is based on an earlier patch by Anton Blanchard. Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Anton Blanchard 提交于
This new prctl is intended for changing the execution mode of the processor, on processors that support both a little-endian mode and a big-endian mode. It is intended for use by programs such as instruction set emulators (for example an x86 emulator on PowerPC), which may find it convenient to use the processor in an alternate endianness mode when executing translated instructions. Note that this does not imply the existence of a fully-fledged ABI for both endiannesses, or of compatibility code for converting system calls done in the non-native endianness mode. The program is expected to arrange for all of its system call arguments to be presented in the native endianness. Switching between big and little-endian mode will require some care in constructing the instruction sequence for the switch. Generally the instructions up to the instruction that invokes the prctl system call will have to be in the old endianness, and subsequent instructions will have to be in the new endianness. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
When debugging early kernel crashes that happen after console_init() and before a proper console driver takes over, we often have to go hack into udbg.c to prevent it from unregistering so we can "see" what is happening. This patch adds a kernel command line option "udbg-immortal" instead to avoid having to modify the kernel. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Michael Neuling 提交于
POWER6 moves some of the MMCRA bits and also requires some bits to be cleared each PMU interrupt. Signed-off-by: NMichael Neuling <mikey@neuling.org> Acked-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Christoph Hellwig 提交于
Make sure dma_alloc_coherent allocates memory from the local node. This is important on Cell where we avoid going through the slow cpu interconnect. Note: I could only test this patch on Cell, it should be verified on some pseries machine by those that have the hardware. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Christoph Hellwig 提交于
On 64bit powerpc we can find out what node a pci bus hangs off, so implement the topology.h macros that export this information. For 32bit this seems a little more difficult, but I don't know of 32bit powerpc NUMA machines either, so let's leave it out for now. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 John Rose 提交于
This patch attempts to handle RTAS "busy" return codes in a more simple and consistent manner. Typical callers of RTAS shouldn't have to manage wait times and delay calls. This patch also changes the kernel to use msleep() rather than udelay() when a runtime delay is necessary. This will avoid CPU soft lockups for extended delay conditions. Signed-off-by: NJohn Rose <johnrose@austin.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Andrew Morton 提交于
From: Andrew Morton <akpm@osdl.org> arch/powerpc/Kconfig:339:warning: leading whitespace ignored arch/powerpc/Kconfig:347:warning: leading whitespace ignored arch/powerpc/Kconfig:357:warning: leading whitespace ignored arch/powerpc/Kconfig:373:warning: leading whitespace ignored arch/powerpc/Kconfig:382:warning: leading whitespace ignored arch/powerpc/Kconfig:394:warning: leading whitespace ignored arch/powerpc/Kconfig:842:warning: leading whitespace ignored arch/powerpc/Kconfig:847:warning: leading whitespace ignored Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Anton Blanchard 提交于
The 970MP cputable entry needs a num_pmcs entry for oprofile to work. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Will Schmidt 提交于
My js20 appears to lack the ibm,#dma- properties, and boot fails with a "Kernel panic - not syncing: iommu_init_table: Can't allocate 0 bytes" message. This adds a fallback to the "#address-cells" property in case the "#ibm,dma-address-cells" property is missing. Tested on js20 and power5 lpar. Unless there is a more elegant solution... :-) Signed-off-by: NWill Schmidt <willschm@us.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
Our MMU hash management code would not set the "C" bit (changed bit) in the hardware PTE when updating a RO PTE into a RW PTE. That would cause the hardware to possibly to a write back to the hash table to set it on the first store access, which in addition to being a performance issue, might also hit a bug when running with native hash management (non-HV) as our code is specifically optimized for the case where no write back happens. Thus there is a very small therocial window were a hash PTE can become corrupted if that HPTE has just been upgraded to read write, a store access happens on it, and that races with another processor evicting that same slot. Since eviction (caused by an almost full hash) is extremely rare, the bug is very unlikely to happen fortunately. This fixes by allowing the updating of the protection bits in the native hash handling to also set (but not clear) the "C" bit, and, in order to also improve performances in the general case, by always setting that bit on newly inserted hash PTE so that writeback really never happens. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
This patch cleans up some locking & error handling in the ppc vdso and moves the vdso base pointer from the thread struct to the mm context where it more logically belongs. It brings the powerpc implementation closer to Ingo's new x86 one and also adds an arch_vma_name() function allowing to print [vsdo] in /proc/<pid>/maps if Ingo's x86 vdso patch is also applied. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Renzo Davoli 提交于
I have tested PPC_PTRACE_GETREGS and PPC_PTRACE_SETREGS on umview. I do not understand why historically these tags has been defined as PPC_PTRACE_GETREGS and PPC_PTRACE_SETREGS instead of simply PTRACE_[GS]ETREGS. The other "originality" is that the address must be put into the "addr" field instead of the "data" field as stated in the manual. Signed-off-by: Nrenzo davoli <renzo@cs.unibo.it> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 01 6月, 2006 25 次提交
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由 Paul Mackerras 提交于
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git://ftp.linux-mips.org/pub/scm/upstream-linus由 Linus Torvalds 提交于
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Treat R14000 like R10000. [MIPS] Remove EXPERIMENTAL from PAGE_SIZE_16KB [MIPS] Update/Fix instruction definitions [MIPS] DSP and MDMX share the same config flag bit. [MIPS] Fix deadlock on MP with cache aliases. [MIPS] Use generic STABS_DEBUG macro. [MIPS] Create consistency in "system type" selection. [MIPS] Use generic DWARF_DEBUG [MIPS] Fix kgdb exception handler from user mode. [MIPS] Update struct sigcontext member names [MIPS] Update/fix futex assembly [MIPS] Remove support for sysmips(2) SETNAME and MIPS_RDNVRAM operations. [MIPS] Fix detection and handling of the 74K processor. [MIPS] Add missing 34K processor IDs [MIPS] Fix marking buddy of pte global for MIPS32 w/36-bit physical address [MIPS] AU1xxx mips_timer_interrupt() fixes [MIPS] Fix typo
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由 Kumba 提交于
Signed-off-by: NJoshua Kinard <kumba@gentoo.org> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
This is known to be working fine for a while. While at it also update and fix the help texts. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Thiemo Seufer 提交于
A small bugfix for up to now unused instruction definitions, and a somewhat larger update to cover MIPS32R2 instructions. Signed-off-by: NThiemo Seufer <ths@networkno.de> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Thiemo Seufer 提交于
Clarify comment. Signed-off-by: NThiemo Seufer <ths@networkno.de> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
A proper fix would involve introducing the notion of shared caches but at this stage of 2.6.17 that's going to be too intrusive and not needed for current hardware; aside I think some discussion will be needed. So for now on the affected SMP configurations which happen to suffer from cache aliases we make use of the fact that a single cache will be shared by all processors. This solves the deadlock issue and will improve performance by getting rid of the smp_call_function overhead. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Atsushi Nemoto 提交于
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Martin Michlmayr 提交于
The "system type" Kconfig options on MIPS are not consistent. For some platforms, only the name is listed while other entries are prepended with "Support for". Remove this as it doesn't make sense when describing the "system type". Signed-off-by: NMartin Michlmayr <tbm@cyrius.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Atsushi Nemoto 提交于
When debugging a kernel compiled by gcc 4.1 with gdb 6.4, gdb could not show filename, linenumber, etc. It seems fixed if I used generic DWARF_DEBUG macro. Although gcc 3.x seems work without this change, it would be better to use the generic macro unless there were something MIPS specific. Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Atsushi Nemoto 提交于
Fix a calculation of saved vector address in trap_low. (damage done by lmo f4c72cc7) Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Daniel Jacobowitz 提交于
Rename the 64-bit sc_hi and sc_lo arrays to use the same names as the 32-bit struct sigcontext (sc_mdhi, sc_hi1, et cetera). Signed-off-by: NDaniel Jacobowitz <dan@codesourcery.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
o Implement futex_atomic_op_inuser() operation o Don't use the R10000-ll/sc bug workaround version for every processor. branch likely is deprecated and some historic ll/sc processors don't implement it. In any case it's slow. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
SETNAME only had a minor defect but probably never had a user and MIPS_RDNVRAM was unimplemented anyway. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Chris Dearman 提交于
Nothing exciting; Linux just didn't know it yet so this is most adding a value to a case statement. Signed-off-by: NChris Dearman <chris@mips.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Nigel Stephens 提交于
The 34K is very much like a 24K on steroids. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Sergei Shtylyov 提交于
In case of CONFIG_64BIT_PHYS_ADDR, set_pte() and pte_clear() functions only set _PAGE_GLOBAL bit in the pte_low field of the buddy PTEs, forgetting to propagate ito to pte_high. Thus, the both pages might not really be made global for the CPU (since it AND's the G-bit of the odd / even PTEs together to decide whether they're global or not). Thus, if only a single page is allocated via vmalloc() or ioremap(), it's not really global for CPU (and it must be, since this is kernel mapping), and thus its ASID is compared against the current process' one -- so, we'll get into trouble sooner or later... Also, pte_none() will fail on global pages because _PAGE_GLOBAL bit is set in both pte_low and pte_high, and pte_val() will return u64 value consisting of those fields concateneted. Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Herbert Valerio Riedel 提交于
common/au1000/irq.c was missing a mips_timer_interrupt() prototype, whereas in common/au1000/time.c the actual mips_timer_interrupt() implementation was missing an irq_exit() invocation, causing a preempt_count() leak. Signed-off-by: NHerbert Valerio Riedel <hvr@hvrlab.org> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Ralf Baechle 提交于
Found by Chris Dearman (chris@mips.com). Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Deepak Saxena 提交于
The ARM Architecture Reference Manual lists bit 4 of the PMD as "implementation defined" and it must be set to zero on Intel XScale CPUs or the cache does not behave properly. Found by Mike Rapoport while debugging a flash issue on the PXA255: http://marc.10east.com/?l=linux-arm-kernel&m=114845287600782&w=1Signed-off-by: NDeepak Saxena <dsaxena@plexity.net> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Andrew Morton 提交于
From: Andrew Morton <akpm@osdl.org> Move the forward decl outside the ifdef, since we use it in both legs. Should fix the spacr64 build error reported in http://bugzilla.kernel.org/show_bug.cgi?id=6625Acked-by: N"David S. Miller" <davem@davemloft.net> Cc: Cedric Pellerin <cedric@bidouillesoft.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 NeilBrown 提交于
From: NeilBrown <neilb@suse.de> If an error is reported by a drive in a RAID array (which is done via bi_end_io - in interrupt context), we call md_error and md_new_event which calls sysfs_notify. However sysfs_notify grabs a mutex and so cannot be called in interrupt context. This patch just creates a variant of md_new_event which avoids the sysfs call, and uses that. A better fix for later is to arrange for the event to be called from user-context. Note: avoiding the sysfs call isn't a problem as an error will not, by itself, modify the sync_action attribute. (We do still need to wake_up(&md_event_waiters) as an error by itself will modify /proc/mdstat). Signed-off-by: NNeil Brown <neilb@suse.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Jeremy Higdon 提交于
From: Jeremy Higdon <jeremy@sgi.com> This patch fixes a bug in sgiioc4 where it was using the default IDE port I/O operations instead of MMIO. The IDE part of the IOC4 chip uses MMIO to map the chip registers. Unfortunately, the sgiioc4 driver uses the default port IO operations, which happens to have worked for the past few years. That's about to change, however, thus this change from inX/outX to readX/writeX. Signed-off-by: NJeremy Higdon <jeremy@sgi.com> Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Martin Michlmayr 提交于
From: Martin Michlmayr <tbm@cyrius.com> Fix the following compilation error: CC drivers/video/maxinefb.o drivers/video/maxinefb.c:58: warning: initializer-string for array of chars is too long drivers/video/maxinefb.c:58: warning: (near initialization for \u2018maxinefb_fix.id\u2019) drivers/video/maxinefb.c:110: error: unknown field \u2018fb_get_fix\u2019 specified in initializer drivers/video/maxinefb.c:110: error: \u2018gen_get_fix\u2019 undeclared here (not in a function) drivers/video/maxinefb.c:111: error: unknown field \u2018fb_get_var\u2019 specified in initializer drivers/video/maxinefb.c:111: error: \u2018gen_get_var\u2019 undeclared here (not in a function) make[2]: *** [drivers/video/maxinefb.o] Error 1 Signed-off-by: NMartin Michlmayr <tbm@cyrius.com> Signed-off-by: NAntonino Daplas <adaplas@pol.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Rodolfo Giometti 提交于
From: Rodolfo Giometti <giometti@linux.it> Fix the following warning on compilation: drivers/video/au1100fb.c: In function `au1100fb_fb_setcolreg': drivers/video/au1100fb.c:219: warning: ISO C90 forbids mixed declarations and code drivers/video/au1100fb.c: In function `au1100fb_fb_pan_display': drivers/video/au1100fb.c:321: warning: ISO C90 forbids mixed declarations and code drivers/video/au1100fb.c: In function `au1100fb_fb_mmap': drivers/video/au1100fb.c:387: warning: ISO C90 forbids mixed declarations and code drivers/video/au1100fb.c: In function `au1100fb_drv_probe': drivers/video/au1100fb.c:471: warning: unsigned int format, long unsigned int arg (arg 2) drivers/video/au1100fb.c: At top level: drivers/video/au1100fb.c:617: warning: initialization from incompatible pointer type drivers/video/au1100fb.c:618: warning: initialization from incompatible pointer type Signed-off-by: NRodolfo Giometti <giometti@linux.it> Signed-off-by: NAntonino Daplas <adaplas@pol.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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