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* tracing/kmemtrace: export kmemtrace_mark_alloc_node() / kmemtrace_mark_free()Ingo Molnar2008-12-303-2/+5
| | | | | | | | Impact: build fix Also fix up Kconfig dependencies and include files. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* tracing, kvm: change MARKERS to select instead of depends onIngo Molnar2008-12-301-1/+2
| | | | | | | | | | | | | | Impact: build fix fix: kernel/trace/Kconfig:42:error: found recursive dependency: TRACING -> TRACEPOINTS -> MARKERS -> KVM_TRACE -> RELAY -> KMEMTRACE -> TRACING markers is a facility that should be selected - not depended on by an interactive Kconfig entry. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* tracing/kmemtrace: normalize the raw tracer event to the unified tracing APIFrederic Weisbecker2008-12-3012-41/+401
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: new tracer plugin This patch adapts kmemtrace raw events tracing to the unified tracing API. To enable and use this tracer, just do the following: echo kmemtrace > /debugfs/tracing/current_tracer cat /debugfs/tracing/trace You will have the following output: # tracer: kmemtrace # # # ALLOC TYPE REQ GIVEN FLAGS POINTER NODE CALLER # FREE | | | | | | | | # | type_id 1 call_site 18446744071565527833 ptr 18446612134395152256 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 0 call_site 18446744071565636711 ptr 18446612134345164672 bytes_req 240 bytes_alloc 240 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 0 call_site 18446744071565636711 ptr 18446612134345164912 bytes_req 240 bytes_alloc 240 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 0 call_site 18446744071565636711 ptr 18446612134345165152 bytes_req 240 bytes_alloc 240 gfp_flags 208 node -1 type_id 0 call_site 18446744071566144042 ptr 18446612134346191680 bytes_req 1304 bytes_alloc 1312 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 type_id 0 call_site 18446744071565585597 ptr 18446612134405955584 bytes_req 4096 bytes_alloc 4096 gfp_flags 208 node -1 type_id 1 call_site 18446744071565585534 ptr 18446612134405955584 That was to stay backward compatible with the format output produced in inux/tracepoint.h. This is the default ouput, but note that I tried something else. If you change an option: echo kmem_minimalistic > /debugfs/trace_options and then cat /debugfs/trace, you will have the following output: # tracer: kmemtrace # # # ALLOC TYPE REQ GIVEN FLAGS POINTER NODE CALLER # FREE | | | | | | | | # | - C 0xffff88007c088780 file_free_rcu + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname + K 240 240 000000d0 0xffff8800790dc780 -1 d_alloc - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname + K 240 240 000000d0 0xffff8800790dc870 -1 d_alloc - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname + K 240 240 000000d0 0xffff8800790dc960 -1 d_alloc + K 1304 1312 000000d0 0xffff8800791d7340 -1 reiserfs_alloc_inode - C 0xffff88007cad6000 putname + K 4096 4096 000000d0 0xffff88007cad6000 -1 getname - C 0xffff88007cad6000 putname + K 992 1000 000000d0 0xffff880079045b58 -1 alloc_inode + K 768 1024 000080d0 0xffff88007c096400 -1 alloc_pipe_info + K 240 240 000000d0 0xffff8800790dca50 -1 d_alloc + K 272 320 000080d0 0xffff88007c088780 -1 get_empty_filp + K 272 320 000080d0 0xffff88007c088000 -1 get_empty_filp Yeah I shall confess kmem_minimalistic should be: kmem_alternative. Whatever, I find it more readable but this a personal opinion of course. We can drop it if you want. On the ALLOC/FREE column, + means an allocation and - a free. On the type column, you have K = kmalloc, C = cache, P = page I would like the flags to be GFP_* strings but that would not be easy to not break the column with strings.... About the node...it seems to always be -1. I don't know why but that shouldn't be difficult to find. I moved linux/tracepoint.h to trace/tracepoint.h as well. I think that would be more easy to find the tracer headers if they are all in their common directory. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* relayfs: replace BUG() with WARN_ON() in relay_late_setup_files()Ingo Molnar2008-12-301-3/+1
| | | | | | | | | | | | | | | | | | | | | | Impact: turn boot crash into boot warning This BUG() can trigger: [ 16.684131] initcall fail_page_alloc_debugfs+0x0/0xc1 returned 0 after 0 usecs [ 16.692035] calling kmemtrace_setup_late+0x0/0xd5 @ 1 [ 16.700087] relay_late_setup_files: CPU 1 has no buffer, it must have! [ 16.704044] ------------[ cut here ]------------ [ 16.708030] kernel BUG at kernel/relay.c:680! [ 16.708030] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC [ 16.708030] last sysfs file: [ 16.708030] [ 16.708030] Pid: 1, comm: swapper Not tainted (2.6.28-tip-03903-g9a39f58-dirty #13207) System Product Name [ 16.708030] EIP: 0060:[<c01604ae>] EFLAGS: 00010246 CPU: 1 [ 16.708030] EIP is at relay_late_setup_files+0x8c/0x176 Reduce it to a more reportable WARN_ONCE(). Signed-off-by: Ingo Molnar <mingo@elte.hu>
* kmemtrace: move #include linesIngo Molnar2008-12-302-2/+2
| | | | | | | | | Impact: avoid conflicts with kmemcheck kmemcheck modifies the same area of slab.c and slub.c - move the include lines up a bit. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'topic/kmemtrace' of ↵Ingo Molnar2008-12-2916-65/+967
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 into tracing/kmemtrace
| * kmemtrace: add missing newlineVegard Nossum2008-12-291-1/+1
| | | | | | | | | | | | | | | | This was causing artifacts in my dmesg. Acked-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: remove config option for enabling tracing at bootPekka Enberg2008-12-293-14/+4
| | | | | | | | | | | | | | | | Users can pass kmemtrace.enabled=yes as a kernel parameter to enable kmemtrace at boot so remove the useless CONFIG_KMEMTRACE_DEFAULT_ENABLED config option. Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: allow kmemtrace to be enabled after bootPekka Enberg2008-12-291-13/+13
| | | | | | | | | | | | | | | | | | | | The kmemtrace_init() function returns early if kmemtrace is disabled at boot causing kmemtrace_setup_late() to also bail out on NULL channel. This has the unfortunate side effect that none of the debugfs files needed to enable kmemtrace after boot are created. Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: remove unnecessary castsPekka Enberg2008-12-291-4/+3
| | | | | | | | | | | | Now that we use _RET_IP_ there's no need to cast 'caller' to unsigned long. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: SLUB hooks for caller-tracking functions.Eduard - Gabriel Munteanu2008-12-291-2/+17
| | | | | | | | | | | | | | | | | | | | This patch adds kmemtrace hooks for __kmalloc_track_caller() and __kmalloc_node_track_caller(). Currently, they set the call site pointer to the value recieved as a parameter. (This could change if we implement stack trace exporting in kmemtrace.) Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: Better alternative to "kmemtrace: fix printk format warnings".Eduard - Gabriel Munteanu2008-12-291-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the problem "kmemtrace: fix printk format warnings" attempted to fix, but resulted in marker-probe format mismatch warnings. Instead of carrying size_t into probes, we get rid of it by casting to unsigned long, just as we did with gfp_t. This way, we don't need to change marker format strings and we don't have to rely on other format specifiers like "%zu", making for consistent use of more generic data types (since there are no format specifiers for gfp_t, for example). Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: Fix typos in documentation.Eduard - Gabriel Munteanu2008-12-292-2/+2
| | | | | | | | | | | | | | | | Corrected the ABI description and the kmemtrace usage guide. Thanks to Randy Dunlap for noticing these errors. Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: SLUB hooks.Eduard - Gabriel Munteanu2008-12-292-9/+109
| | | | | | | | | | | | | | This adds hooks for the SLUB allocator, to allow tracing with kmemtrace. Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: SLOB hooks.Eduard - Gabriel Munteanu2008-12-292-10/+36
| | | | | | | | | | | | | | | | | | | | | | | | This adds hooks for the SLOB allocator, to allow tracing with kmemtrace. We also convert some inline functions to __always_inline to make sure _RET_IP_, which expands to __builtin_return_address(0), always works as expected. Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: SLAB hooks.Eduard - Gabriel Munteanu2008-12-292-16/+123
| | | | | | | | | | | | | | | | | | | | | | This adds hooks for the SLAB allocator, to allow tracing with kmemtrace. We also convert some inline functions to __always_inline to make sure _RET_IP_, which expands to __builtin_return_address(0), always works as expected. Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: Additional documentation.Eduard - Gabriel Munteanu2008-12-292-0/+197
| | | | | | | | | | | | | | | | | | Documented kmemtrace's ABI, purpose and design. Also includes a short usage guide, FAQ, as well as a link to the userspace application's Git repository, which is currently hosted at repo.or.cz. Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * kmemtrace: Core implementation.Eduard - Gabriel Munteanu2008-12-297-0/+467
| | | | | | | | | | | | | | | | | | | | | | kmemtrace provides tracing for slab allocator functions, such as kmalloc, kfree, kmem_cache_alloc, kmem_cache_free etc.. Collected data is then fed to the userspace application in order to analyse allocation hotspots, internal fragmentation and so on, making it possible to see how well an allocator performs, as well as debug and profile kernel code. Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| * SLUB: Replace __builtin_return_address(0) with _RET_IP_.Eduard - Gabriel Munteanu2008-12-293-32/+32
| | | | | | | | | | | | | | | | | | | | | | This patch replaces __builtin_return_address(0) with _RET_IP_, since a previous patch moved _RET_IP_ and _THIS_IP_ to include/linux/kernel.h and they're widely available now. This makes for shorter and easier to read code. [penberg@cs.helsinki.fi: remove _RET_IP_ casts to void pointer] Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
| |
| \
*-. \ Merge branches 'tracing/docs', 'tracing/function-graph-tracer' and 'linus' ↵Ingo Molnar2008-12-292756-77059/+133830
|\ \ \ | | | | | | | | | | | | into tracing/core
| | * \ Merge branch 'next' of ↵Linus Torvalds2008-12-29254-2728/+7138
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (144 commits) powerpc/44x: Support 16K/64K base page sizes on 44x powerpc: Force memory size to be a multiple of PAGE_SIZE powerpc/32: Wire up the trampoline code for kdump powerpc/32: Add the ability for a classic ppc kernel to be loaded at 32M powerpc/32: Allow __ioremap on RAM addresses for kdump kernel powerpc/32: Setup OF properties for kdump powerpc/32/kdump: Implement crash_setup_regs() using ppc_save_regs() powerpc: Prepare xmon_save_regs for use with kdump powerpc: Remove default kexec/crash_kernel ops assignments powerpc: Make default kexec/crash_kernel ops implicit powerpc: Setup OF properties for ppc32 kexec powerpc/pseries: Fix cpu hotplug powerpc: Fix KVM build on ppc440 powerpc/cell: add QPACE as a separate Cell platform powerpc/cell: fix build breakage with CONFIG_SPUFS disabled powerpc/mpc5200: fix error paths in PSC UART probe function powerpc/mpc5200: add rts/cts handling in PSC UART driver powerpc/mpc5200: Make PSC UART driver update serial errors counters powerpc/mpc5200: Remove obsolete code from mpc5200 MDIO driver powerpc/mpc5200: Add MDMA/UDMA support to MPC5200 ATA driver ... Fix trivial conflict in drivers/char/Makefile as per Paul's directions
| | | * | powerpc/44x: Support 16K/64K base page sizes on 44xIlya Yanok2008-12-2810-48/+130
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for 16k and 64k page sizes on PowerPC 44x processors. The PGDIR table is much smaller than a page when using 16k or 64k pages (512 and 32 bytes respectively) so we allocate the PGDIR with kzalloc() instead of __get_free_pages(). One PTE table covers rather a large memory area when using 16k or 64k pages (32MB or 512MB respectively), so we can easily put FIXMAP and PKMAP in the area covered by one PTE table. Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Vladimir Panfilov <pvr@emcraft.com> Signed-off-by: Ilya Yanok <yanok@emcraft.com> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc: Force memory size to be a multiple of PAGE_SIZEHollis Blanchard2008-12-281-1/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure that total memory size is page-aligned, because otherwise mark_bootmem() gets upset. This error case was triggered by using 64 KiB pages in the kernel while arch/powerpc/boot/4xx.c arbitrarily reduced the amount of memory by 4096 (to work around a chip bug that affects the last 256 bytes of physical memory). Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/32: Wire up the trampoline code for kdumpDale Farnsworth2008-12-233-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Wire up the trampoline code for ppc32 to relay exceptions from the vectors at address 0 to vectors at address 32MB, and modify Kconfig to enable Kdump support for all classic powerpcs. Signed-off-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/32: Add the ability for a classic ppc kernel to be loaded at 32MDale Farnsworth2008-12-235-14/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the ability for a classic ppc kernel to be loaded at an address of 32MB. This done by fixing a few places that assume we are loaded at address 0, and by changing several uses of KERNELBASE to use PAGE_OFFSET, instead. Signed-off-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/32: Allow __ioremap on RAM addresses for kdump kernelAnton Vorontsov2008-12-231-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While for debugging it is good to catch bogus users of ioremap, though for kdump support it is more convenient to use __ioremap for copy_oldmem_page() (exactly as we do for PPC64 currently). Note that copy_oldmem_page() calls __ioremap with flags set to '0', so it should be safe with the regard to the caches. The other option is to use kmap_atomic_pfn()[1], but it will not work for kernels compiled without HIGHMEM. That is, on a board with 256MB RAM and crashkernel=64M@32M case, the !HIGHMEM capturing kernel maps 0-96M range, which does not include all the memory needed to capture the dump. And, obviously, accessing anything upper than 96M will cause faults. [1] http://ozlabs.org/pipermail/linuxppc-dev/2007-November/046747.html Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/32: Setup OF properties for kdumpDale Farnsworth2008-12-232-52/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Refactor the setting of kdump OF properties, moving the common code from machine_kexec_64.c to machine_kexec.c where it can be used on both ppc64 and ppc32. This will be needed for kdump to work on ppc32 platforms. Signed-off-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/32/kdump: Implement crash_setup_regs() using ppc_save_regs()Anton Vorontsov2008-12-232-10/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This replaces the dummy crash_setup_regs function with full-fledged crash_setup_regs implementation. On PPC32 we simply use the new ppc_save_regs function to dump the registers. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc: Prepare xmon_save_regs for use with kdumpAnton Vorontsov2008-12-235-5/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Today the arch/powerpc/xmon/setjmp.S file contains only the xmon_save_regs function. We want to use it for kdump purposes, so let's move the file into arch/powerpc/kernel/ and give the function a more generic name (ppc_save_regs). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc: Remove default kexec/crash_kernel ops assignmentsAnton Vorontsov2008-12-237-43/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Default ops are implicit now. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc: Make default kexec/crash_kernel ops implicitAnton Vorontsov2008-12-231-12/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This removes the need for each platform to specify default kexec and crash kernel ops, thus effectively adds a working kexec support for most 6xx/7xx/7xxx-based boards. Platforms that can't cope with default ops will explode in some weird way (a hang or reboot is most likely), which means that the board's kexec support should be fixed or blacklisted via dummy _prepare callback returning -ENOSYS. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc: Setup OF properties for ppc32 kexecDale Farnsworth2008-12-232-19/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Refactor the setting of kexec OF properties, moving the common code from machine_kexec_64.c to machine_kexec.c where it can be used on both ppc64 and ppc32. This is needed for kexec to work on ppc32 platforms. Signed-off-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/pseries: Fix cpu hotplugSebastien Dugue2008-12-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, pseries_cpu_die() calls msleep() while polling RTAS for the status of the dying cpu. However, if the cpu that is going down also happens to be the one doing the tick then we're hosed as the tick_do_timer_cpu 'baton' is only passed later on in tick_shutdown() when _cpu_down() does the CPU_DEAD notification. Therefore jiffies won't be updated anymore. This replaces that msleep() with a cpu_relax() to make sure we're not going to schedule at that point. With this patch my test box survives a 100k iterations hotplug stress test on _all_ cpus, whereas without it, it quickly dies after ~50 iterations. Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net> Cc: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc: Fix KVM build on ppc440Paul Mackerras2008-12-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 2a4aca1144394653269720ffbb5a325a77abd5fa ("powerpc/mm: Split low level tlb invalidate for nohash processors") changed a call to _tlbia to _tlbil_all but didn't include the header that defines _tlbil_all, leading to a build failure on 440 if KVM is enabled. This fixes it. Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/cell: add QPACE as a separate Cell platformBenjamin Krill2008-12-225-16/+175
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the QPACE (Chromodynamics Parallel Computing on the Cell Broadband Engine) platform doesn't use a iommu, doesn't have PCI devices and a MPIC much lesser setup and configurations are needed. So far all devices are detected as OF device. A notifier function is used to set the dma_ops for the of_platform bus. Further this patch splits the PPC_CELL_NATIVE into PPC_CELL_COMMON which are parts that are shared with the QPACE platform and the rest. Signed-off-by: Benjamin Krill <ben@codiert.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| | | * | powerpc/cell: fix build breakage with CONFIG_SPUFS disabledArnd Bergmann2008-12-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CBE_THERM and OPROFILE_CELL both cannot be built without SPU_FS disabled, so make the dependency explicit. Reported-by: Milton Miller <miltonm@bga.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| | | * | powerpc/mpc5200: fix error paths in PSC UART probe functionWolfram Sang2008-12-211-8/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - error cases for mapbase and irq were unbundled - mapped irq now gets disposed on error Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: add rts/cts handling in PSC UART driverWolfram Sang2008-12-212-5/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add RTS/CTS-support for the PSC of the MPC5200B. Tested with a Phytec MPC5200B-IO. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Make PSC UART driver update serial errors countersRené Bürgel2008-12-211-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the capability to the mpc52xx-uart to report framing errors, parity errors, breaks and overruns to userspace. These values may be requested in userspace by using the ioctl TIOCGICOUNT. Signed-off-by: René Bürgel <r.buergel@unicontrol.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Remove obsolete code from mpc5200 MDIO driverWolfram Sang2008-12-211-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As this driver polls for a complete MDIO transaction, there is no need to enable interrupts for it. Furthermore, make both checks for freeing MDIO-bus irqs consistent. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Add MDMA/UDMA support to MPC5200 ATA driverTim Yamin2008-12-213-78/+488
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds MDMA/UDMA support using BestComm for DMA on the MPC5200 platform. Based heavily on previous work by Freescale (Bernard Kuhn, John Rigby) and Domen Puncer. With this patch, a SanDisk Extreme IV CF card gets read speeds of approximately 26.70 MB/sec. Signed-off-by: Tim Yamin <plasm@roo.me.uk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Disable bestcomm prefetching when ATA DMA enabledGrant Likely2008-12-213-5/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When ATA DMA is enabled, bestcomm prefetching does not work. This patch adds a function to disable bestcomm prefetch when the ATA Bestcomm task is initialized. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Bestcomm fixes to ATA supportTim Yamin2008-12-212-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) ata.h has dst_pa in the wrong place (needs to match what the BestComm task microcode in bcom_ata_task.c expects); fix it. 2) The BestComm ATA task priority was changed to maximum in bestcomm_priv.h; this fixes a deadlock issue experienced with heavy DMA occurring on both the ATA and Ethernet BestComm tasks, e.g. when downloading a large file over a LAN to disk. Signed-off-by: Tim Yamin <plasm@roo.me.uk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Bugfix on handling variable sized buffer descriptorsGrant Likely2008-12-211-19/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The buffer descriptors for the ATA BestComm task are larger than the current definition for bcom_bd. This causes problems because the various bcom_... functions dereference the buffer descriptor pointer by using the array operator which doesn't work when the buffer descriptors are a different size. This patch adds the bcom_get_bd() function which uses the value in bcom_task.bd_size to calculate the offset into the BD table. This patch also changes the definition of bcom_bd to specify a data size of 0 instead of 1 so that it will never work if anyone attempts to dereference the bd list as an array (as opposed to something that might work even though it is wrong). Finally, this patch moves the definition of bcom_bd up in the file to eliminate a forward declaration. Based on patch originally written by Tim Yamin. Signed-off-by: Tim Yamin <plasm@roo.me.uk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Make internal 5200 PIC the default interrupt controllerGrant Likely2008-12-211-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The MPC5200 internal interrupt controller setup function needs to set the default interrupt controller when it is called. Without this irq_create_of_mapping() cannot be called without first determining the pointer to the irq controller (ie. call with controller = NULL). Reported-by: Steven Cavanagh <scavanagh@secretlab.ca> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/mpc5200: Document and tidy irq driverGrant Likely2008-12-215-122/+189
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds documentation to the mpc5200 interrupt controller driver and cleans up some minor coding conventions. It also moves the contents of mpc52xx_pic.h into the driver proper (except for a small common bit that is moved to the common mpc52xx.h) because the information encoded there is not required by any other part of kernel code. Finally for code readability sake, the L2_OFFSET shift value is removed because the code using it resolves to a noop. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc: Fix missing 'blr' in _tlbia()Benjamin Herrenschmidt2008-12-211-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rework to MMU code dropped a much missed 'blr' instruction. Brown-Paper-Bag-Worn-By: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | | * | powerpc/bootwrapper: Use the child-bus #address-cells to decide which range ↵Scott Wood2008-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | entry to use The correct #address-cells was still used for the actual translation, so the impact is only a possibility of choosing the wrong range entry or failing to find any match. Most common cases were not affected. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc: Const-qualify Device Node Argument to DCR Resource Extent APIGrant Erickson2008-12-212-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add const qualifier to device_node argument for dcr_resource_{start,len} as of_get_property also const-qualifies this argument. Signed-off-by: Grant Erickson <gerickson@nuovations.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | | * | powerpc/44x: 44x TLB doesn't need "Guarded" set for all pagesBenjamin Herrenschmidt2008-12-211-1/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After discussing with chip designers, it appears that it's not necessary to set G everywhere on 440 cores. The various core errata related to prefetch should be sorted out by firmware by disabling icache prefetching in CCR0. We add the workaround to the kernel however just in case oooold firmwares don't do it. This is valid for -all- 4xx core variants. Later ones hard wire the absence of prefetch but it doesn't harm to clear the bits in CCR0 (they should already be cleared anyway). We still leave G=1 on the linear mapping for now, we need to stop over-mapping RAM to be able to remove it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-27 03:47:26 +0100