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2014-12-01target: Move dev_alua_tg_pt_gps_cit to struct se_subsystem_apiNicholas Bellinger
This patch adds support for dev_alua_tg_pt_gps_cit as an external config_item_type using TB_CIT_SETUP() helper macro, and sets only ct_group_ops following existing code. It updates target_core_make_subdev() + target_core_setup_dev_attrib_cit() + struct target_backend_cits, and drops left-over target_core_dev_alua_tg_pt_gps_cit from target_core_configfs.c code and update comments. This patch introduces no functional change from existing code. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-01target: Move dev_wwn_cit to struct se_subsystem_apiNicholas Bellinger
This patch adds support for dev_wwn_cit as an external config_item_type using TB_CIT_SETUP() helper macro, and sets both ct_item_ops + ct_attr following existing code. It updates target_core_make_subdev() + target_core_setup_dev_attrib_cit() + struct target_backend_cits, and drops left-over target_core_dev_wwn_cit from target_core_configfs.c code and update comments. This patch introduces no functional change from existing code. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-01target: Move dev_pr_cit to struct se_subsystem_apiNicholas Bellinger
This patch adds support for dev_pr_cit as an external config_item_type using TB_CIT_SETUP() helper macro, and sets both ct_item_ops + ct_attr following existing code. It updates target_core_make_subdev() + target_core_setup_dev_attrib_cit() + struct target_backend_cits, and drops left-over target_core_dev_pr_cit from target_core_configfs.c code and update comments. This patch introduces no functional change from existing code. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-01target: Move dev_attrib_cit to struct se_subsystem_apiNicholas Bellinger
This patch adds support for dev_attrib_cit as an external config_item_type using TB_CIT_SETUP() helper macro, and sets both ct_item_ops + ct_attr following existing code. It updates target_core_make_subdev() + target_core_setup_dev_attrib_cit() + struct target_backend_cits, and drops left-over target_core_dev_attrib_cit from target_core_configfs.c code and update comments. This patch introduces no functional change from existing code. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-01target: Move dev_cit to struct se_subsystem_apiNicholas Bellinger
This patch adds initial support for dev_cit as external config_item_type. This includes a new struct target_backend_cits to hold the external CITs within struct se_subsystem_api, and target_core_setup_sub_cits() to be used by backend drivers ahead of transport_subsystem_register(). It adds a TB_CIT_SETUP() helper following target_core_fabric_configfs.c to perform the config_item_type assignments. Also, drop left-over target_core_dev_cit from target_core_configfs.c code and update comments. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-01target: Deletion of unnecessary checks before the function call "module_put"Markus Elfring
The module_put() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-01target: Fix target_core_register_fabric() for built-in fabric modulesRoland Dreier
If we try to create a fabric directory in configfs for one of the default hard-coded fabric modules (iscsi and loopback), and that fabric is actually built into the kernel, then the operation will spuriously fail because request_module() (for the code that's already linked into the kernel) fails. Fix this by running the autoprobing code only if an initial target_core_get_fabric() fails. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-12-02drm/nouveau: prevent stale fence->channel pointers, and protect with rcuMaarten Lankhorst
Tested-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2014-12-02drm/nouveau/fifo/g84-: ack non-stall interrupt before handling itBen Skeggs
Closes a very unlikely race that can occur if another NonStallInterrupt method passes between checking fences and acking the previous interrupt. With this change, the interrupt will re-fire under such conditions. Tested-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2014-12-01Merge tag 'ext4_for_linus_urgent' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 bugfix from Ted Ts'o: "Fix an ext4 metadata checksum regression introduced in v3.18-rc3" * tag 'ext4_for_linus_urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: jbd2: fix regression where we fail to initialize checksum seed when loading
2014-12-02drm/gma500: add support for atom e6xx lpc lvds i2cJan Safrata
add gpio bitbanging i2c adapter on LPC device of atom e6xx gpu chipset to access lvds EDID tested on SECO QuadMo747-E6xx-EXTREME Qseven platform Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: Jan Safrata <jan.nikitenko@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-12-02powerpc/xmon: Cleanup the breakpoint flagsMichael Ellerman
Drop BP_IABR_TE, which though used, does not do anything useful. Rename BP_IABR to BP_CIABR. Renumber the flags. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-12-02powerpc/xmon: Enable HW instruction breakpoint on POWER8Anshuman Khandual
This patch enables support for hardware instruction breakpoint in xmon on POWER8 platform with the help of a new register called the CIABR (Completed Instruction Address Breakpoint Register). With this patch, a single hardware instruction breakpoint can be added and cleared during any active xmon debug session. The hardware based instruction breakpoint mechanism works correctly with the existing TRAP based instruction breakpoint available on xmon. There are no powerpc CPU with CPU_FTR_IABR feature any more. This patch has re-purposed all the existing IABR related code to work with CIABR register based HW instruction breakpoint. This has one odd feature, which is that when we hit a breakpoint xmon doesn't tell us we have hit the breakpoint. This is because xmon is expecting bp->address == regs->nip. Because CIABR fires on completition regs->nip points to the instruction after the breakpoint. We could fix that, but it would then confuse other parts of the xmon code which think we need to emulate the instruction. [mpe] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
2014-12-02Merge remote-tracking branch 'benh/next' into nextMichael Ellerman
Merge updates collected & acked by Ben. A few EEH patches from Gavin, some mm updates from Aneesh and a few odds and ends.
2014-12-02powerpc/mm/thp: Use tlbiel if possibleAneesh Kumar K.V
If we know that user address space has never executed on other cpus we could use tlbiel. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/mm/thp: Remove code duplicationAneesh Kumar K.V
Rename invalidate_old_hpte to flush_hash_hugepage and use that in other places. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/mm/hugetlb: Sanity check gigantic hugepage countJames Yang
Limit the number of gigantic hugepages specified by the hugepages= parameter to MAX_NUMBER_GPAGES. Signed-off-by: James Yang <James.Yang@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/oprofile: Disable pagefaults during user stack readJiang Lu
A page fault occurred during reading user stack in oprofile backtrace would lead following calltrace: WARNING: at linux/kernel/smp.c:210 Modules linked in: CPU: 5 PID: 736 Comm: sh Tainted: G W 3.14.23-WR7.0.0.0_standard #1 task: c0000000f6208bc0 ti: c00000007c72c000 task.ti: c00000007c72c000 NIP: c0000000000ed6e4 LR: c0000000000ed5b8 CTR: 0000000000000000 REGS: c00000007c72f050 TRAP: 0700 Tainted: G W (3.14.23-WR7.0.0 tandard) MSR: 0000000080021000 <CE,ME> CR: 48222482 XER: 00000000 SOFTE: 0 GPR00: c0000000000ed5b8 c00000007c72f2d0 c0000000010aa048 0000000000000005 GPR04: c000000000fdb820 c00000007c72f410 0000000000000001 0000000000000005 GPR08: c0000000010b5768 c000000000f8a048 0000000000000001 0000000000000000 GPR12: 0000000048222482 c00000000fffe580 0000000022222222 0000000010129664 GPR16: 0000000010143cc0 0000000000000000 0000000044444444 0000000000000000 GPR20: c00000007c7221d8 c0000000f638e3c8 000003f15a20120d 0000000000000001 GPR24: 000000005a20120d c00000007c722000 c00000007cdedda8 00003fffef23b160 GPR28: 0000000000000001 c00000007c72f410 c000000000fdb820 0000000000000006 NIP [c0000000000ed6e4] .smp_call_function_single+0x18c/0x248 LR [c0000000000ed5b8] .smp_call_function_single+0x60/0x248 Call Trace: [c00000007c72f2d0] [c0000000000ed5b8] .smp_call_function_single+0x60/0x248 (unreliable) [c00000007c72f3a0] [c000000000030810] .__flush_tlb_page+0x164/0x1b0 [c00000007c72f460] [c00000000002e054] .ptep_set_access_flags+0xb8/0x168 [c00000007c72f500] [c0000000001ad3d8] .handle_mm_fault+0x4a8/0xbac [c00000007c72f5e0] [c000000000bb3238] .do_page_fault+0x3b8/0x868 [c00000007c72f810] [c00000000001e1d0] storage_fault_common+0x20/0x44 Exception: 301 at .__copy_tofrom_user_base+0x54/0x5b0 LR = .op_powerpc_backtrace+0x190/0x20c [c00000007c72fb00] [c000000000a2ec34] .op_powerpc_backtrace+0x204/0x20c (unreliable) [c00000007c72fbc0] [c000000000a2b5fc] .oprofile_add_ext_sample+0xe8/0x118 [c00000007c72fc70] [c000000000a2eee0] .fsl_emb_handle_interrupt+0x20c/0x27c [c00000007c72fd30] [c000000000a2e440] .op_handle_interrupt+0x44/0x58 [c00000007c72fdb0] [c000000000016d68] .performance_monitor_exception+0x74/0x90 [c00000007c72fe30] [c00000000001d8b4] exc_0x260_common+0xfc/0x100 performance_monitor_exception() is executed in a context with interrupt disabled and preemption enabled. When there is a user space page fault happened, do_page_fault() invoke in_atomic() to decide whether kernel should handle such page fault. in_atomic() only check preempt_count. So need call pagefault_disable() to disable preemption before reading user stack. Signed-off-by: Jiang Lu <lu.jiang@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-01jbd2: fix regression where we fail to initialize checksum seed when loadingDarrick J. Wong
When we're enabling journal features, we cannot use the predicate jbd2_journal_has_csum_v2or3() because we haven't yet set the sb feature flag fields! Moreover, we just finished loading the shash driver, so the test is unnecessary; calculate the seed always. Without this patch, we fail to initialize the checksum seed the first time we turn on journal_checksum, which means that all journal blocks written during that first mount are corrupt. Transactions written after the second mount will be fine, since the feature flag will be set in the journal superblock. xfstests generic/{034,321,322} are the regression tests. (This is important for 3.18.) Signed-off-by: Darrick J. Wong <darrick.wong@oracle.coM> Reported-by: Eric Whitney <enwlinux@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2014-12-02NFC: hci: Add support for NOTIFY_ALL_PIPE_CLEAREDChristophe Ricard
When switching from UICC to another, the CLF may signals to the Terminal Host that some existing pipe are cleared for future update. This notification needs to be "acked" by the Terminal Host with a ANY_OK message. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: hci: Add open pipe command handlerChristophe Ricard
If our terminal connect with other host like UICC, it may create a pipe with us, the host controller will notify us new pipe created, after that UICC will open that pipe, if we don't handle that request, UICC may failed to continue initialize which may lead to card emulation feature failed to work Signed-off-by: Arron Wang <arron.wang@intel.com> Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: st21nfcb: Improve ndlc commentChristophe Ricard
In ndlc_probe function we initialize timers. They are not started. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: st21nfca: Rework st21nfca_hci_event_received to route event to relevent ↵Christophe Ricard
gate. As many event with the same id can come from several gates, it will be easier to manage each of them by gate. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: nci: Add se_io NCI operandChristophe Ricard
se_io allows to send apdu over the CLF to the embedded Secure Element. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: nci: Update nci_disable_se to run proprietary commands to disable a ↵Christophe Ricard
secure element Some NFC controller using NCI protocols may need a proprietary commands flow to disable a secure element Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: nci: Update nci_enable_se to run proprietary commands to enable a ↵Christophe Ricard
secure element Some NFC controller using NCI protocols may need a proprietary commands flow to enable a secure element Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: nci: Update nci_discover_se to run proprietary commands to discover all ↵Christophe Ricard
available secure element Some NFC controller using NCI protocols may need a proprietary commands flow to discover all available secure element Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02Merge tag 'v3.18-rc7' into drm-nextDave Airlie
This fixes a bunch of conflicts prior to merging i915 tree. Linux 3.18-rc7 Conflicts: drivers/gpu/drm/exynos/exynos_drm_drv.c drivers/gpu/drm/i915/i915_drv.c drivers/gpu/drm/i915/intel_pm.c drivers/gpu/drm/tegra/dc.c
2014-12-02NFC: nci: Fix sparse: symbol 'nci_get_prop_rf_protocol' was not declared.Christophe Ricard
Fix sparse warning introduced by commit: 9e87f9a9c4c4754508b2c2638fbde9e10c7a103b It was generating the following warning: net/nfc/nci/ntf.c:170:7: sparse: symbol 'nci_get_prop_rf_protocol' was not declared. Should it be static? Procedure to reproduce it: # apt-get install sparse git checkout 9e87f9a9c4c4754508b2c2638fbde9e10c7a103b make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__ Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: hci: Add se_io HCI operandChristophe Ricard
se_io allows to send apdu over the CLF to the embedded Secure Element. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02powerpc/mm: Check for matching hpte without taking hpte lockAneesh Kumar K.V
With smaller hash page table config, we would end up in situation where we would be replacing hash page table slot frequently. In such config, we will find the hpte to be not matching, and we can do that check without holding the hpte lock. We need to recheck the hpte again after holding lock. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc: Drop useless warning in eeh_init()Greg Kurz
This is what we get in dmesg when booting a pseries guest and the hypervisor doesn't provide EEH support. [ 0.166655] EEH functionality not supported [ 0.166778] eeh_init: Failed to call platform init function (-22) Since both powernv_eeh_init() and pseries_eeh_init() already complain when hitting an error, it is not needed to print more (especially such an uninformative message). Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/powernv: Cleanup unused MCE definitions/declarations.Mahesh Salgaonkar
Cleanup OpalMCE_* definitions/declarations and other related code which is not used anymore. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: Benjamin Herrrenschmidt <benh@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/eeh: Dump PHB diag-data earlyGavin Shan
On PowerNV platform, PHB diag-data is dumped after stopping device drivers. In case of recursive EEH errors, the kernel is usually crashed before dumping PHB diag-data for the second EEH error. It's hard to locate the root cause of the second EEH error without PHB diag-data. The patch adds one more EEH option "eeh=early_log", which helps dumping PHB diag-data immediately once frozen PE is detected, in order to get the PHB diag-data for the second EEH error. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/eeh: Recover EEH error on ownership change for BCM5719Gavin Shan
In PCI passthrou scenario, we need simulate EEH recovery for Emulex adapters when their ownership changes, as we did in commit 5cfb20b96 ("powerpc/eeh: Emulate EEH recovery for VFIO devices"). Broadcom BCM5719 adpaters are facing same problem and needs same cure. Reported-by: Rajeshkumar Subramanian <rajeshkumars@in.ibm.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/eeh: Set EEH_PE_RESET on PE resetGavin Shan
The patch introduces additional flag EEH_PE_RESET to indicate the corresponding PE is under reset. In turn, the PE retrieval bakcend on PowerNV platform can return unfrozen state for the EEH core to moving forward. Flag EEH_PE_CFG_BLOCKED isn't the correct one for the purpose. In PCI passthrou case, the problem is more worse: Guest doesn't recover 6th EEH error. The PE is left in isolated (frozen) and config blocked state on Broadcom adapters. We can't retrieve the PE's state correctly any more, even from the host side via sysfs /sys/bus/pci/devices/xxx/eeh_pe_state. Reported-by: Rajeshkumar Subramanian <rajeshkumars@in.ibm.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/eeh: Refactor eeh_reset_pe()Gavin Shan
The patch refactors eeh_reset_pe() in order for: * Varied return values for different failure cases. * Replace pr_err() with pr_warn() and print function name. * Coding style cleanup. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-01PCI: tegra: Use physical range for I/O mappingThierry Reding
Commit 0b0b0893d49b ("of/pci: Fix the conversion of IO ranges into IO resources") changed how I/O resources are parsed from DT. Rather than containing the physical address of the I/O region, the addresses will now be in I/O address space. On Tegra the union of all ranges is used to expose a top-level memory- mapped resource for the PCI host bridge. This helps to make /proc/iomem more readable. Combining both of the above, the union would now include the I/O space region. This causes a regression on Tegra20, where the physical base address of the PCIe controller (and therefore of the union) is located at physical address 0x80000000. Since I/O space starts at 0, the union will now include all of system RAM which starts at 0x00000000. This commit fixes this by keeping two copies of the I/O range: one that represents the range in the CPU's physical address space, the other for the range in the I/O address space. This allows the translation setup within the driver to reuse the physical addresses. The code registering the I/O region with the PCI core uses both ranges to establish the mapping. Fixes: 0b0b0893d49b ("of/pci: Fix the conversion of IO ranges into IO resources") Reported-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Marc Zyngier <marc.zyngier@arm.com> Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2014-12-02NFC: st21nfcb: Remove gpio_irq field in static and dts configurationChristophe Ricard
- phy->gpio_irq is never done out of the request resources. - irq_of_parse_and_map is already done in the i2c core so client->irq is already set when entering in st21nfcb_hci_i2c_of_request_resources - In case of static platform configuration client->irq can be set directly. - It simplifies the code a bit. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: st21nfcb: Add of_st21nfcb_i2c_match to MODULE_DEVICE_TABLEChristophe Ricard
When CONFIG_OF is define add of_st21nfcb_i2c_match to MODULE_DEVICE_TABLE Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: st21nfca: Remove gpio_irq field in static and dts configurationChristophe Ricard
- phy->gpio_irq is never done out of the request resources. - irq_of_parse_and_map is already done in the i2c core so client->irq is already set when entering in st21nfca_hci_i2c_of_request_resources - In case of static platform configuration client->irq can be set directly - It simplifies the code a bit. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02NFC: st21nfca: Add of_st21nfca_i2c_match to MODULE_DEVICE_TABLEChristophe Ricard
When CONFIG_OF is define add of_st21nfca_i2c_match to MODULE_DEVICE_TABLE. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-12-02cpufreq: arm_big_little: free OPP table created during ->init()Viresh Kumar
OPP layer now supports freeing of OPPs and we should free them once they aren't useful anymore. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-01perf report: In branch stack mode use address history sortingAndi Kleen
Enable CCKEY_ADDRESS address history sorting with --branch-history. This makes get_srcline display the source lines correctly, otherwise all history entries for a function a hunked into one. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1416275935-20971-1-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-12-01perf report: Add --branch-history optionAndi Kleen
Add a --branch-history option to perf report that changes all the settings necessary for using the branches in callstacks. This is just a short cut to make this nicer to use, it does not enable any functionality by itself. v2: Change sort order. Rename option to --branch-history to be less confusing. v3: Updates v4: Fix conflict with newer perf base v5: Port to latest tip v6: Add more comments. Remove CCKEY_ADDRESS setting. Remove unnecessary branch_mode setting. Use a boolean. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1415844328-4884-5-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-12-01perf callchain: Support handling complete branch stacks as histogramsAndi Kleen
Currently branch stacks can be only shown as edge histograms for individual branches. I never found this display particularly useful. This implements an alternative mode that creates histograms over complete branch traces, instead of individual branches, similar to how normal callgraphs are handled. This is done by putting it in front of the normal callgraph and then using the normal callgraph histogram infrastructure to unify them. This way in complex functions we can understand the control flow that lead to a particular sample, and may even see some control flow in the caller for short functions. Example (simplified, of course for such simple code this is usually not needed), please run this after the whole patchkit is in, as at this point in the patch order there is no --branch-history, that will be added in a patch after this one: tcall.c: volatile a = 10000, b = 100000, c; __attribute__((noinline)) f2() { c = a / b; } __attribute__((noinline)) f1() { f2(); f2(); } main() { int i; for (i = 0; i < 1000000; i++) f1(); } % perf record -b -g ./tsrc/tcall [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.044 MB perf.data (~1923 samples) ] % perf report --no-children --branch-history ... 54.91% tcall.c:6 [.] f2 tcall | |--65.53%-- f2 tcall.c:5 | | | |--70.83%-- f1 tcall.c:11 | | f1 tcall.c:10 | | main tcall.c:18 | | main tcall.c:18 | | main tcall.c:17 | | main tcall.c:17 | | f1 tcall.c:13 | | f1 tcall.c:13 | | f2 tcall.c:7 | | f2 tcall.c:5 | | f1 tcall.c:12 | | f1 tcall.c:12 | | f2 tcall.c:7 | | f2 tcall.c:5 | | f1 tcall.c:11 | | | --29.17%-- f1 tcall.c:12 | f1 tcall.c:12 | f2 tcall.c:7 | f2 tcall.c:5 | f1 tcall.c:11 | f1 tcall.c:10 | main tcall.c:18 | main tcall.c:18 | main tcall.c:17 | main tcall.c:17 | f1 tcall.c:13 | f1 tcall.c:13 | f2 tcall.c:7 | f2 tcall.c:5 | f1 tcall.c:12 The default output is unchanged. This is only implemented in perf report, no change to record or anywhere else. This adds the basic code to report: - add a new "branch" option to the -g option parser to enable this mode - when the flag is set include the LBR into the callstack in machine.c. The rest of the history code is unchanged and doesn't know the difference between LBR entry and normal call entry. - detect overlaps with the callchain - remove small loop duplicates in the LBR Current limitations: - The LBR flags (mispredict etc.) are not shown in the history and LBR entries have no special marker. - It would be nice if annotate marked the LBR entries somehow (e.g. with arrows) v2: Various fixes. v3: Merge further patches into this one. Fix white space. v4: Improve manpage. Address review feedback. v5: Rename functions. Better error message without -g. Fix crash without -b. v6: Rebase v7: Rebase. Use NO_ENTRY in memset. v8: Port to latest tip. Move add_callchain_ip to separate patch. Skip initial entries in callchain. Minor cleanups. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1415844328-4884-3-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-12-01perf stat: Add support for snapshot countersJiri Olsa
The .snapshot file indicates that the provided event value is a snapshot value. Bypassing the delta computation logic for such event. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-12-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-12-01perf stat: Add support for per-pkg countersJiri Olsa
The .per-pkg file indicates that all but one value per socket should be discarded. Adding the logic of skipping the rest of the socket once first value was read. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-11-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-12-01perf tools: Remove perf_evsel__read interfaceJiri Olsa
Removing the perf_evsel__read interfaces because we replaced the only user in the stat command code. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-8-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-12-01perf stat: Use read_counter in read_counter_aggrJiri Olsa
Use the read_counter function as the values retrieval function for aggr counter values thus eliminating the use of __perf_evsel__read function. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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