- 15 Nov, 2012 39 commits
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Aravinda Prasad authored
On powerpc, ptrace will disable hardware breakpoint request once the breakpoint is hit. It is the responsibility of the caller to set it again. However, when the caller sets the hardware breakpoint again using ptrace(PTRACE_SET_DEBUGREG, child_pid, 0, addr), the hardware breakpoint is not enabled. While gdb's approach is to unregister and re-register the hardware breakpoint every time the breakpoint is hit - which is working fine, this could affect other programs trying to re-register hardware breakpoint without unregistering. This patch enables hardware breakpoint if the caller is re-registering. Signed-off-by:
Aravinda Prasad <aravinda@linux.vnet.ibm.com> Acked-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Akinobu Mita authored
The only difference between powerpc and asm-generic le-bitops is test_bit_le(). Usually all bitops require a long aligned bitmap. But powerpc test_bit_le() can take an unaligned address. There is no special callsite of test_bit_le() that needs unaligned access in powerpc as far as I can see. So convert to use asm-generic/bitops/le.h for powerpc. Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by:
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Akinobu Mita authored
Replace BITOP_MASK and BITOP_WORD with BIT_MASK and BIT_WORD defined in linux/bitops.h and remove BITOP_* which are not used anymore. Signed-off-by:
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Akinobu Mita authored
- Caluculate the bitmap size with BITS_TO_LONGS() - Use bitmap_empty() to verify that all bits are cleared This also includes a printk to pr_warn() conversion. Signed-off-by:
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Sukadev Bhattiprolu authored
Use the 'unistd.h' from arch/powerpc/include/uapi to build the perf tool. Signed-off-by:
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by:
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Yang Li authored
There are many cases that Semiconductor is misspelled. The patch fix these typos. Signed-off-by:
Li Yang <leoli@freescale.com> Acked-by:
Timur Tabi <timur@freescale.com> Signed-off-by:
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Anton Blanchard authored
I noticed a couple of function prototypes for functions that no longer exist. Remove them. Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
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Anton Blanchard authored
Most of setup.h should not be exported to userspace, so move it back. All we are left with is the asm-generic include to pick up the COMMAND_LINE_SIZE define. Signed-off-by:
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Michael Neuling authored
Fix global symbol name to match actual denorm_exception_hv label. Signed-off-by:
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Michael Neuling authored
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Michael Neuling authored
Just a copy of POWER7 for now. Will update with new code later. Signed-off-by:
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Michael Neuling authored
We are going to reuse this in POWER8 so make the name generic. Signed-off-by:
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Michael Ellerman authored
If we have two cache events that require different settings of the L2SEL bits in MMCR1 then we can not schedule those events simultaneously. Add logic to the constraint handling to express that. Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Acked-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Andreas Schwab authored
The transition time for the 7447A is around 8ms which makes it possible to use the ondemand governor. This has been tested on the iBook G4 (PowerBook6,7). Signed-off-by:
Andreas Schwab <schwab@linux-m68k.org> Tested-by:
Michel Dänzer <michel@daenzer.net> Signed-off-by:
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Michael Neuling authored
Signed-off-by:
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Michael Neuling authored
s/intruction/instruction/ Signed-off-by:
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K.Prasad authored
PPC_PTRACE_GETHWDBGINFO, PPC_PTRACE_SETHWDEBUG and PPC_PTRACE_DELHWDEBUG are PowerPC specific ptrace flags that use the watchpoint register. While they are targeted primarily towards BookE users, user-space applications such as GDB have started using them for BookS too. This patch enables the use of generic hardware breakpoint interfaces for these new flags. Apart from the usual benefits of using generic hw-breakpoint interfaces, these changes allow debuggers (such as GDB) to use a common set of ptrace flags for their watchpoint needs and allow more precise breakpoint specification (length of the variable can be specified). Mikey added: rebased and added dbginfo.features around #ifdef CONFIG_HAVE_HW_BREAKPOINT Signed-off-by:K.Prasad <prasad@linux.vnet.ibm.com> Acked-by:
David Gibson <david@gibson.dropbear.id.au> Signed-off-by:
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Michael Ellerman authored
The last user of ppc_md.idle_loop() was removed when we dropped the legacy iSeries code, in commit 8ee3e0d6. Signed-off-by:
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Li Zhong authored
This patch tries to fix the following BUG report: [ 0.012313] BUG: MAX_STACK_TRACE_ENTRIES too low! [ 0.012318] turning off the locking correctness validator. [ 0.012321] Call Trace: [ 0.012330] [c00000017666f6d0] [c000000000012128] .show_stack+0x78/0x184 (unreliable) [ 0.012339] [c00000017666f780] [c0000000000b6348] .save_trace+0x12c/0x14c [ 0.012345] [c00000017666f800] [c0000000000b7448] .mark_lock+0x2bc/0x710 [ 0.012351] [c00000017666f8b0] [c0000000000bb198] .__lock_acquire+0x748/0xaec [ 0.012357] [c00000017666f9b0] [c0000000000bb684] .lock_acquire+0x148/0x194 [ 0.012365] [c00000017666fa80] [c00000000069371c] .mutex_lock_nested+0x84/0x4ec [ 0.012372] [c00000017666fb90] [c000000000096998] .smpboot_register_percpu_thread+0x3c/0x10c [ 0.012380] [c00000017666fc30] [c0000000009ba910] .spawn_ksoftirqd+0x28/0x48 [ 0.012386] [c00000017666fcb0] [c00000000000a98c] .do_one_initcall+0xd8/0x1d0 [ 0.012392] [c00000017666fd60] [c00000000000b1f8] .kernel_init+0x120/0x398 [ 0.012398] [c00000017666fe30] [c000000000009ad4] .ret_from_kernel_thread+0x5c/0x64 [ 0.012404] [c00000017666fa00] [c00000017666fb20] 0xc00000017666fb20 [ 0.012410] [c00000017666fa80] [c00000000069371c] .mutex_lock_nested+0x84/0x4ec [ 0.012416] [c00000017666fb90] [c000000000096998] .smpboot_register_percpu_thread+0x3c/0x10c [ 0.012422] [c00000017666fc30] [c0000000009ba910] .spawn_ksoftirqd+0x28/0x48 [ 0.012427] [c00000017666fcb0] [c00000000000a98c] .do_one_initcall+0xd8/0x1d0 [ 0.012433] [c00000017666fd60] [c00000000000b1f8] .kernel_init+0x120/0x398 [ 0.012439] [c00000017666fe30] [c000000000009ad4] .ret_from_kernel_thread+0x5c/0x64 ....... The reason is that the back chain of c00000017666fe30 (ret_from_kernel_thread) contains some invalid value, which might form a loop. Signed-off-by:
Li Zhong <zhong@linux.vnet.ibm.com> Signed-off-by:
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Benjamin Herrenschmidt authored
OPAL provides the firmware base/entry in registers at boot time for debugging purposes. We had a bug in the code trying to stash these into the appropriate kernel globals (a line of code was probably dropped by accident back when this was merged) Signed-off-by: -
Julia Lawall authored
The function initialize_flash_pde_data is only called four times. All four calls are in the function rtas_flash_init, and on the failure of any of the calls, remove_flash_pde is called on the third argument of each of the calls. There is thus no need for initialize_flash_pde_data to call remove_flash_pde on the same argument. remove_flash_pde kfrees the data field of its argument, and does not clear that field, so this amounts ot a possible double free. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ identifier f,free,a; parameter list[n] ps; type T; expression e; @@ f(ps,T a,...) { ... when any when != a = e if(...) { ... free(a); ... return ...; } ... when any } @@ identifier r.f,r.free; expression x,a; expression list[r.n] xs; @@ * x = f(xs,a,...); if (...) { ... free(a); ... return ...; } // </smpl> Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
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Gavin Shan authored
There're couples of functions defined to print debugging messages during initializing P7IOC. However, we got bogus output from those functions like pe_info(). The problem here is that the message level (the first parameter to printk()) isn't printable and that caused the bogus output. The patch fixes the issue by merging __pe_printk() to the macro define_pe_printk_level() so that we can pass the message level directly to printk(). Reported-by:
Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by:
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Srinivas Kandagatla authored
This patch removes some code duplication by using module_platform_driver. Signed-off-by:
Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by:
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Michael Ellerman authored
It is possible to configure a kernel which has xmon enabled, but has no udbg backend to provide IO. This can make xmon rather confusing, as it produces no output, blocks for two seconds, and then returns. As a last resort we can instead try to printk(), which may deadlock or otherwise crash, but tries quite hard not to. Signed-off-by:
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Michael Ellerman authored
Currently xmon_depth_to_print is static and global, but it's only ever used in xmon_show_stack(). At least with a modern compiler it's inlined, so there's no point in it being static, we could #define it but it's only used in one place. By reworking the logic we can drop count and just decrement the max value as a loop counter. Also switch to a while loop so we actually print no more than 64 frames as you'd expect based on the variable name. Signed-off-by:
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Michael Ellerman authored
We use STACK_FRAME_OVERHEAD in the exception vectors to establish the exception frame, so it should be good enough to use here. Signed-off-by:
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Michael Ellerman authored
Neither REGS_PER_LINE or LAST_VOLATILE are used, nor have they ever been as far back as I can see. Signed-off-by:
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Michael Ellerman authored
We have two #defines that rename scanhex() and skipbl() to xmon_scanhex() and xmon_skipbl() - but no one ever uses those names. So the only effect is to rename the actual symbols in the generated code, and AFACIS there is no reason to do that, so drop them. Signed-off-by:
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Michael Ellerman authored
The routines in start.c are only ever called from nonstdio.c, so if we move them in there they can become static which is nice. I suspect the idea behind the separation was that start.c could be replaced in order to build xmon in userland. If anyone still cares about doing that we could handle that with an ifdef or two. Signed-off-by:
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Michael Ellerman authored
xmon_getchar() is only called from within nonstdio.c, so make it static. Signed-off-by:
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Michael Ellerman authored
This has been empty since 2005, commit 51d3082f "Unify udbg (#2)". Signed-off-by:
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Michael Ellerman authored
It looks like xmon_expect() was used for doing xmon over a modem (!?), that code was dropped in 2005 in commit 51d3082f "Unify udbg (#2)". Once xmon_expect() is gone xmon_read_poll() is unused, drop it too. Signed-off-by:
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Michael Ellerman authored
The last user of udbg_read() was removed in 2005, in commit fca5dcd4 "Simplify and clean up the xmon terminal I/O". Given we haven't needed it for 7 years we can probably drop it. Signed-off-by:
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Wei Yongjun authored
Use the module_i2c_driver() macro to make the code smaller and a bit simpler. dpatch engine is used to auto generate this patch. (https://github.com/weiyj/dpatch) Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by:
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Tony Breeds authored
Since the "Disintegrate asm/system.h for PowerPC" (ae3a197e) This has been failing when DEBUG is #defined. Signed-off-by:
Tony Breeds <tony@bakeyournoodle.com> Signed-off-by:
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Tony Breeds authored
Don't use 47x only #defines for TLBIVAX or ICBT, supply and use helpers in ppc-opcode.h This fixes a compile breakage. Signed-off-by:
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Matthew McClintock authored
Fixes this following: $ make distclean; make corenet32_smp_defconfig; make p4080ds.dtb CLEAN arch/powerpc/boot CLEAN scripts/basic CLEAN scripts/dtc CLEAN scripts/genksyms CLEAN scripts/kconfig CLEAN scripts/mod CLEAN scripts CLEAN include/config include/generated CLEAN .config HOSTCC scripts/basic/fixdep HOSTCC scripts/kconfig/conf.o SHIPPED scripts/kconfig/zconf.tab.c SHIPPED scripts/kconfig/zconf.lex.c SHIPPED scripts/kconfig/zconf.hash.c HOSTCC scripts/kconfig/zconf.tab.o HOSTLD scripts/kconfig/conf scripts/kconfig/conf --silentoldconfig Kconfig DTC arch/powerpc/boot/p4080ds.dtb /bin/sh: /local/home/mattsm/git/linux/scripts/dtc/dtc: No such file or directory make[1]: *** [arch/powerpc/boot/p4080ds.dtb] Error 1 make: *** [p4080ds.dtb] Error 2 Signed-off-by:
Matthew McClintock <msm@freescale.com> Signed-off-by:
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Nishanth Aravamudan authored
Anticipating growth in coming years, we should ensure we are getting a good lead on testing. Signed-off-by:
Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by:
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Dan Horák authored
I'm reviving an old patch from 2009 that adds support for GXT4000P and GXT6500P adapter to the gxt4500 driver. See threads at http://marc.info/?l=linux-fbdev-devel&m=124345080216952&w=2 and https://lists.ozlabs.org/pipermail/linuxppc-dev/2009-June/072672.html for more details. This patch adds support for GXT4000P and GXT6500P cards found on some IBM pSeries machines. GXT4000P/6000P and GXT4500P/6500P couples are identical from software's point of view and are based on the same Raster Engine (RC1000), except for a different reference clock for the PLL. GXT6x00P models are equipped with an additional Geometry Engine (GT1000) but this driver doesn't use it. Signed-off-by:
Nico Macrionitis <acrux@cruxppc.org> Signed-off-by:
Giuseppe Coviello <cjg@cruxppc.org> Tested-by:
Dan Horák <dan@danny.cz> Signed-off-by:
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- 17 Oct, 2012 1 commit
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Deepthi Dharwar authored
Earlier without cpuidle framework on pseries, the native arch idle routine comprised of both snooze and nap states. smt_snooze_delay variable was used to delay the idle process entry to deeper idle state like nap. With the coming of cpuidle, this arch specific idle was replaced by two different idle routines, one for supporting snooze and other for nap. This enabled addition of more low level idle states on pseries in the future. On adopting the generic cpuidle framework for POWER systems, the decision of which idle state to choose from, given a predicted idle time is taken by the menu governor based on target_residency and exit_latency of the idle states. target_residency is the minimum time to be resident in that idle state. Exit_latency is time taken to exit out of idle state. Deeper the idle state, both the target residency and exit latency would be higher. In the current design, smt_snooze_delay is used as target_residency for the snooze state which is incorrect, as it is not the minimum but the maximum duration to be in snooze state. This would result in the governor in taking bad decision, as presently target_residency of nap < target_residency of snooze inspite of nap being deeper idle state. This patch aims to fix this problem by replacing the smt_snooze_delay loop in snooze state, with the need_resched() as the governor is aware of entry and exit of various idle transitions based on which next idle time prediction. The governor is intelligent enough to determine the idle state the needs to be transitioned to and maintains a whole of heuristics including io load, previous idle states predictions etc for the same, based on which idle state entry decision is taken. With this fix, of setting target_residency of snooze to 0 nap to smt_snooze_delay if the predicted idle time is less than smt_snooze_delay (target_residency of nap) value governor would pick snooze state, else nap. This adhers to the previous native idle design. Signed-off-by:
Deepthi Dharwar <deepthi@linux.vnet.ibm.com> Signed-off-by:
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