- 09 1月, 2006 10 次提交
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由 Arnd Bergmann 提交于
This adds a scheduler for SPUs to make it possible to use more logical SPUs than physical ones are present in the system. Currently, there is no support for preempting a running SPU thread, they have to leave the SPU by either triggering an event on the SPU that causes it to return to the owning thread or by sending a signal to it. This patch also adds operations that enable accessing an SPU in either runnable or saved state. We use an RW semaphore to protect the state of the SPU from changing underneath us, while we are holding it readable. In order to change the state, it is acquired writeable and a context save or restore is executed before downgrading the semaphore to read-only. From: Mark Nutter <mnutter@us.ibm.com>, Uli Weigand <Ulrich.Weigand@de.ibm.com> Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Mark Nutter 提交于
Add the source code that is used to generate spu_save_dump.h and spu_restore_dump.h. Since a full spu tool chain is needed to generate these files, the default remains to use the shipped versions in order to keep the number of tools for building the kernel down. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Mark Nutter 提交于
This adds the code needed to perform a context switch from spufs, following the recommended 76-step sequence. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Mark Nutter 提交于
Add some infrastructure for saving and restoring the context of an SPE. This patch creates a new structure that can hold the whole state of a physical SPE in memory. It also contains code that avoids races during the context switch and the binary code that is loaded to the SPU in order to access its registers. The actual PPE- and SPE-side context switch code are two separate patches. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Arnd Bergmann 提交于
This is the current version of the spu file system, used for driving SPEs on the Cell Broadband Engine. This release is almost identical to the version for the 2.6.14 kernel posted earlier, which is available as part of the Cell BE Linux distribution from http://www.bsc.es/projects/deepcomputing/linuxoncell/. The first patch provides all the interfaces for running spu application, but does not have any support for debugging SPU tasks or for scheduling. Both these functionalities are added in the subsequent patches. See Documentation/filesystems/spufs.txt on how to use spufs. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Heiko J Schick 提交于
This patch adds the necessary core bus support used by device drivers that sit on the IBM GX bus on modern pSeries machines like the Galaxy infiniband for example. It provide transparent DMA ops (the low level driver works with virtual addresses directly) along with a simple bus layer using the Open Firmware matching routines. Signed-off-by: NHeiko J Schick <schickhj@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 David Woodhouse 提交于
This cleanup patch speeds up the null syscall path on ppc64 by about 3%, and brings the ppc32 and ppc64 code slightly closer together. The ppc64 code was checking current_thread_info()->flags twice in the syscall exit path; once for TIF_SYSCALL_T_OR_A before disabling interrupts, and then again for TIF_SIGPENDING|TIF_NEED_RESCHED etc after disabling interrupts. Now we do the same as ppc32 -- check the flags only once in the fast path, and re-enable interrupts if necessary in the ptrace case. The patch abolishes the 'syscall_noerror' member of struct thread_info and replaces it with a TIF_NOERROR bit in the flags, which is handled in the slow path. This shortens the syscall entry code, which no longer needs to clear syscall_noerror. The patch adds a TIF_SAVE_NVGPRS flag which causes the syscall exit slow path to save the non-volatile GPRs into a signal frame. This removes the need for the assembly wrappers around sys_sigsuspend(), sys_rt_sigsuspend(), et al which existed solely to save those registers in advance. It also means I don't have to add new wrappers for ppoll() and pselect(), which is what I was supposed to be doing when I got distracted into this... Finally, it unifies the ppc64 and ppc32 methods of handling syscall exit directly into a signal handler (as required by sigsuspend et al) by introducing a TIF_RESTOREALL flag which causes _all_ the registers to be reloaded from the pt_regs by taking the ret_from_exception path, instead of the normal syscall exit path which stomps on the callee-saved GPRs. It appears to pass an LTP test run on ppc64, and passes basic testing on ppc32 too. Brief tests of ptrace functionality with strace and gdb also appear OK. I wouldn't send it to Linus for 2.6.15 just yet though :) Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Kumar Gala 提交于
Moved 83xx and QUICC Engine interrupt handling code into arch/powerpc as a precursor of getting 83xx sub-arch building in arch/powerpc. Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Michael Ellerman 提交于
This patch merges, to some extent, the PPC32 and PPC64 kexec implementations. We adopt the PPC32 approach of having ppc_md callbacks for the kexec functions. The current PPC64 implementation becomes the "default" implementation for PPC64 which platforms can select if they need no special treatment. I've added these default callbacks to pseries/maple/cell/powermac, this means iSeries no longer supports kexec - but it never worked anyway. I've renamed PPC32's machine_kexec_simple to default_machine_kexec, inline with PPC64. Judging by the comments it might be better named machine_kexec_non_of, or something, but at the moment it's the only implementation for PPC32 so it's the "default". Kexec requires machine_shutdown(), which is in machine_kexec.c on PPC32, but we already have in setup-common.c on powerpc. All this does is call ppc_md.nvram_sync, which only powermac implements, so instead make machine_shutdown a ppc_md member and have it call core99_nvram_sync directly on powermac. I've also stuck relocate_kernel.S into misc_32.S for powerpc. Built for ARCH=ppc, and 32 & 64 bit ARCH=powerpc, with KEXEC=y/n. Booted on P5 LPAR and successfully kexec'ed. Should apply on top of 493f25ef. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Adrian Bunk 提交于
This patch removes the EXPORT_SYMBOL'ed but completely unused variable ucSystemType and removes the unneeded EXPORT_SYMBOL(_prep_type). Signed-off-by: NAdrian Bunk <bunk@stusta.de> Acked-by: NTom Rini <trini@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 08 1月, 2006 8 次提交
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由 Linus Torvalds 提交于
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由 Linus Torvalds 提交于
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由 Linus Torvalds 提交于
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由 Knut Petersen 提交于
Nothing prevents a user to modprobe a framebuffer driver from e.g. the xterm prompt. As a result, the set_par() function of the driver will be called from fbcon_init(). This is fatal as a lot of X / framebuffer combinations are unable to recover from set_par() reprogramming the graphics controller in KD_GRAPHICS mode. It is also unnecessary as the set_par() function will be called during a switch to KD_TEXT anyway. Because of this no side effects are possible. Signed-off-by: NKnut Petersen <Knut_Petersen@t-online.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Vernon Mauery 提交于
Update the ibmasm driver to use the dynamic allocation of input_dev structs to work with the sysfs subsystem. Vojtech: Fixed some problems/bugs in the patch. Dmitry: Fixed some more. Signed-off-by: NVernon Mauery <vernux@us.ibm.com> Signed-off-by: NVojtech Pavlik <vojtech@suse.cz> Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
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由 Russell King 提交于
This is needs to be visible to other architectures using the AMBA bus and peripherals. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
- 07 1月, 2006 22 次提交
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由 Russell King 提交于
Make the AMBA bus code visible to other architectures. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
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由 Russell King 提交于
Since the ARM AMBA bus is used on MIPS as well as ARM, we need to make the bus available for other architectures to use. Move the AMBA include files from include/asm-arm/hardware/ to include/linux/amba/ Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Andre McCurdy 提交于
Patch from Andre McCurdy Replaces generic swab32 routine with a more ARM friendly version. Reduces kernel text size by approx 1200 bytes when compiled with 3.4.4 and approx 2400 bytes with 4.0.2 Probably some performance benefit as well. Signed-off-by: NAndre McCurdy <armccurdy@yahoo.co.uk> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Richard Purdie 提交于
Patch from Richard Purdie Fix a gcc4 build error (incomplete element type) in the pxa SharpSL PM code. Signed-off-by: NRichard Purdie <rpurdie@rpsys.net> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Pavel Pisa 提交于
Patch from Pavel Pisa Correction of the code broken by update whole-tree platform devices update. Signed-off-by: NPavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Borislav Petkov 提交于
Signed-off-by: NBorislav Petkov <petkov@uni-muenster.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLen Brown <len.brown@intel.com>
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由 Randy Dunlap 提交于
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLen Brown <len.brown@intel.com>
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由 Len Brown 提交于
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由 David S. Miller 提交于
I've spent the past 3 days digging into a glibc testsuite failure in current CVS, specifically libc/rt/tst-cputimer1.c The thr1 and thr2 timers fire too early in the second pass of this test. The second pass is noteworthy because it makes use of intervals, whereas the first pass does not. All throughout the posix-cpu-timers.c code, the calculation of the process sched_time sum is implemented roughly as: unsigned long long sum; sum = tsk->signal->sched_time; t = tsk; do { sum += t->sched_time; t = next_thread(t); } while (t != tsk); In fact this is the exact scheme used by check_process_timers(). In the case of check_process_timers(), current->sched_time has just been updated (via scheduler_tick(), which is invoked by update_process_times(), which subsequently invokes run_posix_cpu_timers()) So there is no special processing necessary wrt. that. In other contexts, we have to allot for the fact that tsk->sched_time might be a bit out of date if we are current. And the posix-cpu-timers.c code uses current_sched_time() to deal with that. Unfortunately it does so in an erroneous and inconsistent manner in one spot which is what results in the early timer firing. In cpu_clock_sample_group_locked(), it does this: cpu->sched = p->signal->sched_time; /* Add in each other live thread. */ while ((t = next_thread(t)) != p) { cpu->sched += t->sched_time; } if (p->tgid == current->tgid) { /* * We're sampling ourselves, so include the * cycles not yet banked. We still omit * other threads running on other CPUs, * so the total can always be behind as * much as max(nthreads-1,ncpus) * (NSEC_PER_SEC/HZ). */ cpu->sched += current_sched_time(current); } else { cpu->sched += p->sched_time; } The problem is the "p->tgid == current->tgid" test. If "p" is not current, and the tgids are the same, we will add the process t->sched_time twice into cpu->sched and omit "p"'s sched_time which is very very very wrong. posix-cpu-timers.c has a helper function, sched_ns(p) which takes care of this, so my fix is to use that here instead of this special tgid test. The fact that current can be one of the sub-threads of "p" points out that we could make things a little bit more accurate, perhaps by using sched_ns() on every thread we process in these loops. It also points out that we don't use the most accurate value for threads in the group actively running other cpus (and this is mentioned in the comment). But that is a future enhancement, and this fix here definitely makes sense. Signed-off-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Linus Torvalds 提交于
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由 Linus Torvalds 提交于
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由 Evgeniy 提交于
This patch should fix compilation failure of fs/ufs/dir.c with defined UFS_DIR_DEBUG Signed-off-by: NEvgeniy Dushistov <dushistov@mail.ru> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Dimitri Sivanich 提交于
This greatly reduces the amount of memory used by mmtimer on smaller machines with large values of MAX_COMPACT_NODES. Signed-off-by: NDimitri Sivanich <sivanich@sgi.com> Signed-off-by: NChristoph Lameter <clameter@sgi.com> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Adrian Bunk 提交于
Randy Dunlap: "Dave is no longer at OSDL and is no longer maintaining that driver." Signed-off-by: NAdrian Bunk <bunk@stusta.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Len Brown 提交于
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由 Alexey Dobriyan 提交于
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Alexey Dobriyan 提交于
And fix trivial warnings that emerged. Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Trent Jaeger 提交于
This patch contains two corrections to the LSM-IPsec Nethooks patches previously applied. (1) free a security context on a failed insert via xfrm_user interface in xfrm_add_policy. Memory leak. (2) change the authorization of the allocation of a security context in a xfrm_policy or xfrm_state from both relabelfrom and relabelto to setcontext. Signed-off-by: NTrent Jaeger <tjaeger@cse.psu.edu> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Luiz Capitulino 提交于
pktgen_find_thread() and pktgen_create_thread() are only called at initialization time. Signed-off-by: NLuiz Capitulino <lcapitulino@mandriva.com.br> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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