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* ARM: bcm: tidy up a few includesAlex Elder2014-04-253-6/+5
| | | | | | | | | Clean up a few header file includes, eliminating a few that are not really needed and putting in their place some that are. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Matt Porter <mporter@linaro.org> Signed-off-by: Matt Porter <mporter@linaro.org>
* ARM: bcm: config option for l2 cache supportAlex Elder2014-04-254-5/+20
| | | | | | | | | | | | | | | | | | | | Add a new config option ARCH_BCM_MOBILE_L2_CACHE that allows support for level-2 cache to be enabled or disabled at build time for BCM218XX and BCM21664 family SoCs. Build support for SMC only if it's required (currently it's only required for to support level 2 cache control). If arch/arm/mach-bcm/kona.c gets compiled, ARCH_BCM_MOBILE_L2_CACHE must have been selected, which implies CONFIG_CACHE_L2X0 is set. There is therefore no need to check CONFIG_CACHE_L2X0 at the top of kona_l2_cache_init(), so get rid of that check. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> Reviewed-by: Matt Porter <mporter@linaro.org> Signed-off-by: Matt Porter <mporter@linaro.org>
* ARM: bcm: don't special-case CPU 0 in bcm_kona_smc()Alex Elder2014-04-251-6/+1
| | | | | | | | | | | | | | | | | | | | There's logic in bcm_kona_smc() to ensure __bcm_kona_smc() gets called on CPU 0; if already executing on CPU 0, that function is called directly. The direct call is not protected from interrupts, however, which is not safe. Note that smp_call_function_single() is designed to handle the case where the target cpu is the current one. It also gets a reference to the CPU and disables IRQs across the call. So we can simplify things and at the same time be protected against interrupts by calling smp_call_function_single() unconditionally. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> Reviewed-by: Matt Porter <mporter@linaro.org> Signed-off-by: Matt Porter <mporter@linaro.org>
* ARM: bcm: have bcm_kona_smc() return request resultAlex Elder2014-04-252-8/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Currently it is assumed that SEC_ROM_RET_OK is the only valid "good" result of a secure monitor request. However the values that can be returned by a secure monitor request are dependent on which service id was provided. We therefore should handle the result in a request-dependent way. The most natural way to do that is to have the initiator of the request--where bcm_kona_smc() is called--handle the result in a way appropriate to the request. An "smc" operation must be performed only on core 0, while the request can be initiated from any core. To pass back the request result, we add a new field to the bcm_kona_smc_data structure, and have bcm_kona_smc() return that value rather than 0. There's only one caller right now. Move the existing check of the result out of __bcm_kona_smc() and into the kona_l2_cache_init() where the SSAPI_ENABLE_L2_CACHE request is initiated. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> Reviewed-by: Matt Porter <mporter@linaro.org> Signed-off-by: Matt Porter <mporter@linaro.org>
* ARM: bcm: clean up SMC codeAlex Elder2014-04-252-67/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch just does some simple cleanup in "bcm_kona_smc.c": - Get rid of the secure_bridge_data structure. Instead, just define two globals that record the physical and virtual addresses of the SMC arguments buffer. Use "buffer" instead of "bounce" in their names. Drop of the erroneous __iomem annotation for the physical address. - Get rid of the initialized flag and just use a non-null buffer address to indicate that. - Get the size of the memory region when fetching the SMC arguments buffer location from the device tree. Use it to call ioremap() directly rather than requiring of_iomap() to go look it up again. - Do some additional validation on that memory region size. - Flush caches unconditionally in __bcm_kona_smc(); nothing supplies SSAPI_BRCM_START_VC_CORE as a service id. - Drop a needless initialization of "rc" in __bcm_kona_smc(). It also deletes most of the content of "bcm_kona_smc.h" because it's never actually used and is of questionable value anyway. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> Reviewed-by: Matt Porter <mporter@linaro.org> Signed-off-by: Matt Porter <mporter@linaro.org>
* ARM: bcm: err, don't BUG() on SMC init failuresAlex Elder2014-04-251-4/+10
| | | | | | | | | | | | | Several conditions in bcm_kona_smc_init() are handled with BUG_ON(). That function is capable of returning an error, so do that instead. Also, don't assume of_get_address() returns a valid pointer. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> Reviewed-by: Matt Porter <mporter@linaro.org> Signed-off-by: Matt Porter <mporter@linaro.org>
* ARM: bcm: use memory accessors for ioremapped areaAlex Elder2014-04-251-5/+5
| | | | | | | | | | | | The pointer used to pass parameters to an "smc" call is produced through a call to ioremap(). As such, we should be using functions like writel() to access it. Signed-off-by: Alex Elder <elder@linaro.org> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> Reviewed-by: Matt Porter <mporter@linaro.org> Signed-off-by: Matt Porter <mporter@linaro.org>
* ARM: bcm: clean up config and build targetsAlex Elder2014-04-252-7/+36
| | | | | | | | | | | | | | | | Currently CONFIG_ARCH_BCM_MOBILE is used to select all (both) Broadcom mobile SoC families. Instead, use that only as a config menu switch, and define specific symbols like ARCH_BCM_281XX to select a particular SoC family. If ARCH_BCM_MOBILE is selected, all of the SoCs will be selected by default, but this way each can be disabled individually as well. Note that BCM281xx and BCM21664 both require the SMC and L2 cache control code, so that code will be built based on ARCH_BCM_MOBILE. Signed-off-by: Alex Elder <elder@linaro.org> [mporter: added ARM: to the description] Signed-off-by: Matt Porter <mporter@linaro.org>
* Linux 3.15-rc2v3.15-rc2Linus Torvalds2014-04-201-1/+1
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* Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2014-04-205-6/+18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull slave-dmaengine fixes from Vinod Koul: "Back from long weekend here in India and now the time to send fixes for slave dmaengine. - Dan's fix of sirf xlate code - Jean's fix for timberland - edma fixes by Sekhar for SG handling and Yuan for changing init call" * 'fixes' of git://git.infradead.org/users/vkoul/slave-dma: dma: fix eDMA driver as a subsys_initcall dmaengine: sirf: off by one in of_dma_sirfsoc_xlate() platform: Fix timberdale dependencies dma: edma: fix incorrect SG list handling
| * dma: fix eDMA driver as a subsys_initcallYuan Yao2014-04-161-1/+11
| | | | | | | | | | | | | | Because of some driver base on DMA, changed the initcall order as subsys_initcall. Signed-off-by: Yuan Yao <yao.yuan@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dmaengine: sirf: off by one in of_dma_sirfsoc_xlate()Dan Carpenter2014-04-161-1/+1
| | | | | | | | | | | | | | | | | | | | The ">" here should be ">=" or we are one step beyond the end of the sdma->channels[] array. Fixes: 2e041c94628c ('dmaengine: sirf: enable generic dt binding for dma channels') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * platform: Fix timberdale dependenciesJean Delvare2014-04-162-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | VIDEO_TIMBERDALE selects TIMB_DMA which itself depends on MFD_TIMBERDALE, so VIDEO_TIMBERDALE should either select or depend on MFD_TIMBERDALE as well. I chose to make it depend on it because I think it makes more sense and it is consistent with what other options are doing. Adding a "|| HAS_IOMEM" to the TIMB_DMA dependencies silenced the kconfig warning about unmet direct dependencies but it was wrong: without MFD_TIMBERDALE, TIMB_DMA is useless as the driver has no device to bind to. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mauro Carvalho Chehab <m.chehab@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: edma: fix incorrect SG list handlingSekhar Nori2014-04-141-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code to handle any length SG lists calls edma_resume() even before edma_start() is called. This is incorrect because edma_resume() enables edma events on the channel after which CPU (in edma_start) cannot clear posted events by writing to ECR (per the EDMA user's guide). Because of this EDMA transfers fail to start if due to some reason there is a pending EDMA event registered even before EDMA transfers are started. This can happen if an EDMA event is a byproduct of device initialization. Fix this by calling edma_resume() only if it is not the first batch of MAX_NR_SG elements. Without this patch, MMC/SD fails to function on DA850 EVM with DMA. The behaviour is triggered by specific IP and this can explain why the issue was not reported before (example with MMC/SD on AM335x). Tested on DA850 EVM and AM335x EVM-SK using MMC/SD card. Cc: stable@vger.kernel.org # v3.12.x+ Cc: Joel Fernandes <joelf@ti.com> Acked-by: Joel Fernandes <joelf@ti.com> Tested-by: Jon Ringle <jringle@gridpoint.com> Tested-by: Alexander Holler <holler@ahsoftware.de> Reported-by: Jon Ringle <jringle@gridpoint.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* | Merge tag 'iommu-fixes-v3.15-rc1' of ↵Linus Torvalds2014-04-203-6/+11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull iommu fixes from Joerg Roedel: "Fixes for regressions: - fix wrong IOMMU enumeration causing some SCSI device drivers initialization failures - ARM-SMMU fixes for a panic condition and a wrong return value" * tag 'iommu-fixes-v3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: iommu/arm-smmu: fix panic in arm_smmu_alloc_init_pte iommu/arm-smmu: Return 0 on unmap failure iommu/vt-d: fix bug in matching PCI devices with DRHD/RMRR descriptors iommu/vt-d: Fix get_domain_for_dev() handling of upstream PCIe bridges iommu/vt-d: fix memory leakage caused by commit ea8ea46
| * \ Merge git://git.infradead.org/iommu-2.6 into iommu/fixesJoerg Roedel2014-04-162-4/+9
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| | * | iommu/vt-d: fix bug in matching PCI devices with DRHD/RMRR descriptorsJiang Liu2014-04-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit "59ce0515cdaf iommu/vt-d: Update DRHD/RMRR/ATSR device scope caches when PCI hotplug happens" introduces a bug, which fails to match PCI devices with DMAR device scope entries if PCI path array in the entry has more than one level. For example, it fails to handle [1D2h 0466 1] Device Scope Entry Type : 01 [1D3h 0467 1] Entry Length : 0A [1D4h 0468 2] Reserved : 0000 [1D6h 0470 1] Enumeration ID : 00 [1D7h 0471 1] PCI Bus Number : 00 [1D8h 0472 2] PCI Path : 1C,04 [1DAh 0474 2] PCI Path : 00,02 And cause DMA failure on HP DL980 as: DMAR:[fault reason 02] Present bit in context entry is clear dmar: DRHD: handling fault status reg 602 dmar: DMAR:[DMA Read] Request device [02:00.2] fault addr 7f61e000 Reported-and-tested-by: Davidlohr Bueso <davidlohr@hp.com> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| | * | iommu/vt-d: Fix get_domain_for_dev() handling of upstream PCIe bridgesDavid Woodhouse2014-04-151-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 146922ec79 ("iommu/vt-d: Make get_domain_for_dev() take struct device") introduced new variables bridge_bus and bridge_devfn to identify the upstream PCIe to PCI bridge responsible for the given target device. Leaving the original bus/devfn variables to identify the target device itself, now that it is no longer assumed to be PCI and we can no longer trivially find that information. However, the patch failed to correctly use the new variables in all cases; instead using the as-yet-uninitialised 'bus' and 'devfn' variables. Reported-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| | * | iommu/vt-d: fix memory leakage caused by commit ea8ea46Jiang Liu2014-04-131-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit ea8ea46 "iommu/vt-d: Clean up and fix page table clear/free behaviour" introduces possible leakage of DMA page tables due to: for (pte = page_address(pg); !first_pte_in_page(pte); pte++) { if (dma_pte_present(pte) && !dma_pte_superpage(pte)) freelist = dma_pte_list_pagetables(domain, level - 1, pte, freelist); } For the first pte in a page, first_pte_in_page(pte) will always be true, thus dma_pte_list_pagetables() will never be called and leak DMA page tables if level is bigger than 1. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * | | iommu/arm-smmu: fix panic in arm_smmu_alloc_init_pteBin Wang2014-04-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kernel panic happened when iommu_unmap a buffer larger than 2MB, more than expected pmd entries got “invalidated”, due to a wrong range passed to arm_smmu_alloc_init_pte. it was likely a typo, now we fix it, passing the correct "end" address to arm_smmu_alloc_init_pte. Signed-off-by: Bin Wang <binw@marvell.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
| * | | iommu/arm-smmu: Return 0 on unmap failureLaurent Pinchart2014-04-151-1/+1
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | The IOMMU core expects the unmap operation to return the number of bytes that have been unmapped or 0 on failure, a negative return value being treated like a number of bytes. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
* | | Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds2014-04-204-2/+12
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf tooling fixes from Ingo Molnar: "Three small tooling fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf tools: Improve error reporting perf tools: Adjust symbols in VDSO perf kvm: Fix 'Min time' counting in report command
| * \ \ Merge tag 'perf-urgent-for-mingo' of ↵Ingo Molnar2014-04-204-2/+12
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf into perf/urgent Pull perf/urgent fixes from Jiri Olsa: User visible changes: * Adjust symbols in VDSO to properly resolve its function names (Vladimir Nikulichev) * Improve error reporting for record session failure (Adrien BAK) * Fix 'Min time' counting in report command (Alexander Yarygin) Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
| | * | | perf tools: Improve error reportingAdrien BAK2014-04-202-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the current version, when using perf record, if something goes wrong in tools/perf/builtin-record.c:375 session = perf_session__new(file, false, NULL); The error message: "Not enough memory for reading per file header" is issued. This error message seems to be outdated and is not very helpful. This patch proposes to replace this error message by "Perf session creation failed" I believe this issue has been brought to lkml: https://lkml.org/lkml/2014/2/24/458 although this patch only tackles a (small) part of the issue. Additionnaly, this patch improves error reporting in tools/perf/util/data.c open_file_write. Currently, if the call to open fails, the user is unaware of it. This patch logs the error, before returning the error code to the caller. Reported-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Adrien BAK <adrien.bak@metascale.org> Link: http://lkml.kernel.org/r/1397786443.3093.4.camel@beast [ Reorganize the changelog into paragraphs ] [ Added empty line after fd declaration in open_file_write ] Signed-off-by: Jiri Olsa <jolsa@redhat.com>
| | * | | perf tools: Adjust symbols in VDSOVladimir Nikulichev2014-04-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pert-report doesn't resolve function names in VDSO: $ perf report --stdio -g flat,0.0,15,callee --sort pid ... 8.76% 0x7fff6b1fe861 __gettimeofday ACE_OS::gettimeofday() ... In this case symbol values should be adjusted the same way as for executables, relocatable objects and prelinked libraries. After fix: $ perf report --stdio -g flat,0.0,15,callee --sort pid ... 8.76% __vdso_gettimeofday __gettimeofday ACE_OS::gettimeofday() Signed-off-by: Vladimir Nikulichev <nvs@tbricks.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/r/969812.163009436-sendEmail@nvs Signed-off-by: Jiri Olsa <jolsa@redhat.com>
| | * | | perf kvm: Fix 'Min time' counting in report commandAlexander Yarygin2014-04-201-0/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Every event in the perf-kvm has a 'stats' structure, which contains max/min/average/etc times of handling this event. The problem is that the 'perf-kvm stat report' command always shows that 'min time' is 0us for every event. Example: # perf kvm stat report Analyze events for all VCPUs: VM-EXIT Samples Samples% Time% Min Time Max Time Avg time [..] 0xB2 MSCH 12 0.07% 0.00% 0us 8us 7.31us ( +- 2.11% ) 0xB2 CHSC 12 0.07% 0.00% 0us 18us 9.39us ( +- 9.49% ) 0xB2 STPX 8 0.05% 0.00% 0us 2us 1.88us ( +- 7.18% ) 0xB2 STSI 7 0.04% 0.00% 0us 44us 16.49us ( +- 38.20% ) [..] This happens because the 'stats' structure is not initialized and stats->min equals to 0. Lets initialize the structure for every event after its allocation using init_stats() function. This initializes stats->min to -1 and makes 'Min time' statistics counting work: # perf kvm stat report Analyze events for all VCPUs: VM-EXIT Samples Samples% Time% Min Time Max Time Avg time [..] 0xB2 MSCH 12 0.07% 0.00% 6us 8us 7.31us ( +- 2.11% ) 0xB2 CHSC 12 0.07% 0.00% 7us 18us 9.39us ( +- 9.49% ) 0xB2 STPX 8 0.05% 0.00% 1us 2us 1.88us ( +- 7.18% ) 0xB2 STSI 7 0.04% 0.00% 1us 44us 16.49us ( +- 38.20% ) [..] Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1397053319-2130-3-git-send-email-borntraeger@de.ibm.com [ Fixing the perf examples changelog output ] Signed-off-by: Jiri Olsa <jolsa@redhat.com>
* | | | coredump: fix va_list corruptionEric Dumazet2014-04-191-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A va_list needs to be copied in case it needs to be used twice. Thanks to Hugh for debugging this issue, leading to various panics. Tested: lpq84:~# echo "|/foobar12345 %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h" >/proc/sys/kernel/core_pattern 'produce_core' is simply : main() { *(int *)0 = 1;} lpq84:~# ./produce_core Segmentation fault (core dumped) lpq84:~# dmesg | tail -1 [ 614.352947] Core dump to |/foobar12345 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 (null) pipe failed Notice the last argument was replaced by a NULL (we were lucky enough to not crash, but do not try this on your production machine !) After fix : lpq83:~# echo "|/foobar12345 %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h" >/proc/sys/kernel/core_pattern lpq83:~# ./produce_core Segmentation fault lpq83:~# dmesg | tail -1 [ 740.800441] Core dump to |/foobar12345 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 pipe failed Fixes: 5fe9d8ca21cc ("coredump: cn_vprintf() has no reason to call vsnprintf() twice") Signed-off-by: Eric Dumazet <edumazet@google.com> Diagnosed-by: Hugh Dickins <hughd@google.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@vger.kernel.org # 3.11+ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2014-04-192-12/+10
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Ingo Molnar: "This fixes the preemption-count imbalance crash reported by Owen Kibel" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mce: Fix CMCI preemption bugs
| * | | | x86/mce: Fix CMCI preemption bugsIngo Molnar2014-04-172-12/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following commit: 27f6c573e0f7 ("x86, CMCI: Add proper detection of end of CMCI storms") Added two preemption bugs: - machine_check_poll() does a get_cpu_var() without a matching put_cpu_var(), which causes preemption imbalance and crashes upon bootup. - it does percpu ops without disabling preemption. Preemption is not disabled due to the mistaken use of a raw spinlock. To fix these bugs fix the imbalance and change cmci_discover_lock to a regular spinlock. Reported-by: Owen Kibel <qmewlo@gmail.com> Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Chen, Gong <gong.chen@linux.intel.com> Cc: Josh Boyer <jwboyer@fedoraproject.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Alexander Todorov <atodorov@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/n/tip-jtjptvgigpfkpvtQxpEk1at2@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> -- arch/x86/kernel/cpu/mcheck/mce.c | 4 +--- arch/x86/kernel/cpu/mcheck/mce_intel.c | 18 +++++++++--------- 2 files changed, 10 insertions(+), 12 deletions(-)
* | | | | Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds2014-04-194-11/+32
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Ingo Molnar: "Two fixes: - a SCHED_DEADLINE task selection fix - a sched/numa related lockdep splat fix" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Check for stop task appearance when balancing happens sched/numa: Fix task_numa_free() lockdep splat
| * | | | | sched: Check for stop task appearance when balancing happensKirill Tkhai2014-04-173-5/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need to do it like we do for the other higher priority classes.. Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> Cc: Michael wang <wangyun@linux.vnet.ibm.com> Cc: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/336561397137116@web27h.yandex.ru Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | sched/numa: Fix task_numa_free() lockdep splatMike Galbraith2014-04-112-6/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sasha reported that lockdep claims that the following commit: made numa_group.lock interrupt unsafe: 156654f491dd ("sched/numa: Move task_numa_free() to __put_task_struct()") While I don't see how that could be, given the commit in question moved task_numa_free() from one irq enabled region to another, the below does make both gripes and lockups upon gripe with numa=fake=4 go away. Reported-by: Sasha Levin <sasha.levin@oracle.com> Fixes: 156654f491dd ("sched/numa: Move task_numa_free() to __put_task_struct()") Signed-off-by: Mike Galbraith <bitbucket@online.de> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: torvalds@linux-foundation.org Cc: mgorman@suse.com Cc: akpm@linux-foundation.org Cc: Dave Jones <davej@redhat.com> Link: http://lkml.kernel.org/r/1396860915.5170.5.camel@marge.simpson.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | | | | Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds2014-04-192-12/+16
|\ \ \ \ \ \ | | |_|/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Two kernel side fixes: - an Intel uncore PMU driver potential crash fix - a kprobes/perf-call-graph interaction fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel: Use rdmsrl_safe() when initializing RAPL PMU kprobes/x86: Fix page-fault handling logic
| * | | | | perf/x86/intel: Use rdmsrl_safe() when initializing RAPL PMUVenkatesh Srinivas2014-04-181-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CPUs which should support the RAPL counters according to Family/Model/Stepping may still issue #GP when attempting to access the RAPL MSRs. This may happen when Linux is running under KVM and we are passing-through host F/M/S data, for example. Use rdmsrl_safe to first access the RAPL_POWER_UNIT MSR; if this fails, do not attempt to use this PMU. Signed-off-by: Venkatesh Srinivas <venkateshs@google.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1394739386-22260-1-git-send-email-venkateshs@google.com Cc: zheng.z.yan@intel.com Cc: eranian@google.com Cc: ak@linux.intel.com Cc: linux-kernel@vger.kernel.org [ The patch also silently fixes another bug: rapl_pmu_init() didn't handle the memory alloc failure case previously. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | kprobes/x86: Fix page-fault handling logicMasami Hiramatsu2014-04-171-9/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current kprobes in-kernel page fault handler doesn't expect that its single-stepping can be interrupted by an NMI handler which may cause a page fault(e.g. perf with callback tracing). In that case, the page-fault handled by kprobes and it misunderstands the page-fault has been caused by the single-stepping code and tries to recover IP address to probed address. But the truth is the page-fault has been caused by the NMI handler, and do_page_fault failes to handle real page fault because the IP address is modified and causes Kernel BUGs like below. ---- [ 2264.726905] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [ 2264.727190] IP: [<ffffffff813c46e0>] copy_user_generic_string+0x0/0x40 To handle this correctly, I fixed the kprobes fault handler to ensure the faulted ip address is its own single-step buffer instead of checking current kprobe state. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Sandeepa Prabhu <sandeepa.prabhu@linaro.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: fche@redhat.com Cc: systemtap@sourceware.org Link: http://lkml.kernel.org/r/20140417081644.26341.52351.stgit@ltc230.yrl.intra.hitachi.co.jp Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | | | | Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds2014-04-1953-914/+1058
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull drm fixes from Dave Airlie: "Unfortunately this contains no easter eggs, its a bit larger than I'd like, but I included a patch that just moves code from one file to another and I'd like to avoid merge conflicts with that later, so it makes it seem worse than it is, Otherwise: - radeon: fixes to use new microcode to stabilise some cards, use some common displayport code, some runtime pm fixes, pll regression fixes - i915: fix for some context oopses, a warn in a used path, backlight fixes - nouveau: regression fix - omap: a bunch of fixes" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (51 commits) drm: bochs: drop unused struct fields drm: bochs: add power management support drm: cirrus: add power management support drm: Split out drm_probe_helper.c from drm_crtc_helper.c drm/plane-helper: Don't fake-implement primary plane disabling drm/ast: fix value check in cbr_scan2 drm/nouveau/bios: fix a bit shift error introduced by 457e77b drm/radeon/ci: make sure mc ucode is loaded before checking the size drm/radeon/si: make sure mc ucode is loaded before checking the size drm/radeon: improve PLL params if we don't match exactly v2 drm/radeon: memory leak on bo reservation failure. v2 drm/radeon: fix VCE fence command drm/radeon: re-enable mclk dpm on R7 260X asics drm/radeon: add support for newer mc ucode on CI (v2) drm/radeon: add support for newer mc ucode on SI (v2) drm/radeon: apply more strict limits for PLL params v2 drm/radeon: update CI DPM powertune settings drm/radeon: fix runpm handling on APUs (v4) drm/radeon: disable mclk dpm on R7 260X drm/tegra: Remove gratuitous pad field ...
| * \ \ \ \ \ Merge branch 'drm-next-3.15-wip' of ↵Dave Airlie2014-04-1913-247/+152
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://people.freedesktop.org/~deathsimple/linux into drm-next Some i2c fixes over DisplayPort. * 'drm-next-3.15-wip' of git://people.freedesktop.org/~deathsimple/linux: drm/radeon: Improve vramlimit module param documentation drm/radeon: fix audio pin counts for DCE6+ (v2) drm/radeon/dp: switch to the common i2c over aux code drm/dp/i2c: Update comments about common i2c over dp assumptions (v3) drm/dp/i2c: send bare addresses to properly reset i2c connections (v4) drm/radeon/dp: handle zero sized i2c over aux transactions (v2) drm/i915: support address only i2c-over-aux transactions drm/tegra: dp: Support address-only I2C-over-AUX transactions
| | * | | | | | drm/radeon: Improve vramlimit module param documentationLauri Kasanen2014-04-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
| | * | | | | | drm/radeon: fix audio pin counts for DCE6+ (v2)Alex Deucher2014-04-082-5/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is actually quite a bit of variance based on the asic. v2: fix typo noticed by Jerome. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com> Cc: stable@vger.kernel.org
| | * | | | | | drm/radeon/dp: switch to the common i2c over aux codeAlex Deucher2014-04-085-200/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provides a nice cleanup in radeon. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com>
| | * | | | | | drm/dp/i2c: Update comments about common i2c over dp assumptions (v3)Alex Deucher2014-04-082-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If you are using the common dp over i2c functionality, it is asumed that the aux transfer function does not modify the any of the msg structure other than the reply field. Doing so breaks the logic in the common code. v2: update struct drm_dp_aux comments about assumptions v3 (chk): rebased on upstream changes Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Thierry Reding <treding@nvidia.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Christian König <christian.koenig@amd.com>
| | * | | | | | drm/dp/i2c: send bare addresses to properly reset i2c connections (v4)Alex Deucher2014-04-081-19/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need bare address packets at the start and end of each i2c over aux transaction to properly reset the connection between transactions. This mirrors what the existing dp i2c over aux algo currently does. This fixes EDID fetches on certain monitors especially with dp bridges. v2: update as per Ville's comments - Set buffer to NULL for zero sized packets - abort the entre transaction if one of the messages fails v3: drop leftover debugging code v4: integrate Thierry's comments - add comments about address only transactions - switch back to i and j Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Thierry Reding <treding@nvidia.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Christian König <christian.koenig@amd.com>
| | * | | | | | drm/radeon/dp: handle zero sized i2c over aux transactions (v2)Alex Deucher2014-04-081-5/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Needed for proper i2c over aux handling for certain monitors and configurations (e.g., dp bridges or adapters). v2: add comments clarifying tx_size setting. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com>
| | * | | | | | drm/i915: support address only i2c-over-aux transactionsJani Nikula2014-04-081-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To support bare address requests used by the drm dp helpers. Signed-off-by: Jani Nikula <jani.nikula@intel.com>
| | * | | | | | drm/tegra: dp: Support address-only I2C-over-AUX transactionsThierry Reding2014-04-082-13/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Certain types of I2C-over-AUX transactions require that only the address is transferred. Detect this by looking at the AUX message's size and set the address-only bit appropriately. Signed-off-by: Thierry Reding <treding@nvidia.com>
| * | | | | | | drm: bochs: drop unused struct fieldsGerd Hoffmann2014-04-182-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
| * | | | | | | drm: bochs: add power management supportGerd Hoffmann2014-04-182-0/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | bochs kms driver lacks power management support, thus the vga display doesn't work any more after S3 resume. Fix this by adding suspend and resume functions. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
| * | | | | | | drm: cirrus: add power management supportGerd Hoffmann2014-04-182-0/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cirrus kms driver lacks power management support, thus the vga display doesn't work any more after S3 resume. Fix this by adding suspend and resume functions. Also make the mode_set function unblank the screen. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
| * | | | | | | drm: Split out drm_probe_helper.c from drm_crtc_helper.cDaniel Vetter2014-04-185-372/+437
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is leftover stuff from my previous doc round which I kinda wanted to do but didn't yet due to rebase hell. The modeset helpers and the probing helpers a independent and e.g. i915 uses the probing stuff but has its own modeset infrastructure. It hence makes to split this up. While at it add a DOC: comment for the probing libraray. It would be rather neat to pull some of the DocBook documenting these two helpers into in-line DOC: comments. But unfortunately kerneldoc doesn't support markdown or something similar to make nice-looking documentation, so the current state is better. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
| * | | | | | | drm/plane-helper: Don't fake-implement primary plane disablingDaniel Vetter2014-04-181-28/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After thinking about this topic a bit more I've reached the conclusion that implementing this doesn't make sense: - The locking is all wrong: set_config(NULL) will also unlink encoders and connectors, but those links are protected with the mode_config mutex. In the ->disable_plane callback we only hold all modeset locks, but eventually we want to switch to just grabbing the per-crtc (and maybe per-plane) locks as needed, maybe based on ww_mutexes. Having a callback which absolutely needs all modeset locks is bad for this conversion. Note that the same isn't true for the provided ->update_plane since we've audited the crtc helpers to make sure that not encoder or connector links are changed. - There's no way to re-enable the plane with an ->update_plane: The connectors/encoder links are lost and so we can't re-enable the CRTC. Even without that issue the driver might have reassigned some shared resources (as opposed to e.g. DPMS off, where drivers are not allowed to do that to make sure the CRTC can be enabled again). - The semantics don't make much sense: Userspace asked to scan out black (or some other color if the driver supports a background color), not that the screen be disabled. - Implementing proper primary plane support (i.e. actually disabling the primary plane without disabling the CRTC) is really simple, at least if all the hw needs is flipping a bit. The big task is auditing all the interactions with other ioctls when the CRTC is on but there's no primary plane (e.g. pageflips). And some of that work still needs to be done. Cc: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 21:26:14 +0100