kernel/arch/powerpc/platforms/cell, branch linux-4.3.y

genirq: Remove irq argument from irq flow handlers

2015-09-16T13:47:51Z

Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner Cc: Julia Lawall Cc: Jiang Liu

powerpc/cell: Prepare irq handler for irq argument removal

2015-09-14T08:30:05Z

The irq argument of most interrupt flow handlers is unused or merily used instead of a local variable. The handlers which need the irq argument can retrieve the irq number from the irq descriptor. Search and update was done with coccinelle and the invaluable help of Julia Lawall. Signed-off-by: Thomas Gleixner Cc: Julia Lawall Cc: Jiang Liu Cc: Arnd Bergmann Cc: linuxppc-dev@lists.ozlabs.org

mm: rename alloc_pages_exact_node() to __alloc_pages_node()

2015-09-08T22:35:28Z

alloc_pages_exact_node() was introduced in commit 6484eb3e2a81 ("page allocator: do not check NUMA node ID when the caller knows the node is valid") as an optimized variant of alloc_pages_node(), that doesn't fallback to current node for nid == NUMA_NO_NODE. Unfortunately the name of the function can easily suggest that the allocation is restricted to the given node and fails otherwise. In truth, the node is only preferred, unless __GFP_THISNODE is passed among the gfp flags. The misleading name has lead to mistakes in the past, see for example commits 5265047ac301 ("mm, thp: really limit transparent hugepage allocation to local node") and b360edb43f8e ("mm, mempolicy: migrate_to_node should only migrate to node"). Another issue with the name is that there's a family of alloc_pages_exact*() functions where 'exact' means exact size (instead of page order), which leads to more confusion. To prevent further mistakes, this patch effectively renames alloc_pages_exact_node() to __alloc_pages_node() to better convey that it's an optimized variant of alloc_pages_node() not intended for general usage. Both functions get described in comments. It has been also considered to really provide a convenience function for allocations restricted to a node, but the major opinion seems to be that __GFP_THISNODE already provides that functionality and we shouldn't duplicate the API needlessly. The number of users would be small anyway. Existing callers of alloc_pages_exact_node() are simply converted to call __alloc_pages_node(), with the exception of sba_alloc_coherent() which open-codes the check for NUMA_NO_NODE, so it is converted to use alloc_pages_node() instead. This means it no longer performs some VM_BUG_ON checks, and since the current check for nid in alloc_pages_node() uses a 'nid < 0' comparison (which includes NUMA_NO_NODE), it may hide wrong values which would be previously exposed. Both differences will be rectified by the next patch. To sum up, this patch makes no functional changes, except temporarily hiding potentially buggy callers. Restricting the checks in alloc_pages_node() is left for the next patch which can in turn expose more existing buggy callers. Signed-off-by: Vlastimil Babka Acked-by: Johannes Weiner Acked-by: Robin Holt Acked-by: Michal Hocko Acked-by: Christoph Lameter Acked-by: Michael Ellerman Cc: Mel Gorman Cc: David Rientjes Cc: Greg Thelen Cc: Aneesh Kumar K.V Cc: Pekka Enberg Cc: Joonsoo Kim Cc: Naoya Horiguchi Cc: Tony Luck Cc: Fenghua Yu Cc: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Gleb Natapov Cc: Paolo Bonzini Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Cliff Whickman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge tag 'powerpc-4.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2015-09-03T23:41:38Z

Pull powerpc updates from Michael Ellerman: - support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask from Benjamin Herrenschmidt - EEH fixes for SRIOV from Gavin - introduce rtas_get_sensor_fast() for IRQ handlers from Thomas Huth - use hardware RNG for arch_get_random_seed_* not arch_get_random_* from Paul Mackerras - seccomp filter support from Michael Ellerman - opal_cec_reboot2() handling for HMIs & machine checks from Mahesh Salgaonkar - add powerpc timebase as a trace clock source from Naveen N. Rao - misc cleanups in the xmon, signal & SLB code from Anshuman Khandual - add an inline function to update POWER8 HID0 from Gautham R. Shenoy - fix pte_pagesize_index() crash on 4K w/64K hash from Michael Ellerman - drop support for 64K local store on 4K kernels from Michael Ellerman - move dma_get_required_mask() from pnv_phb to pci_controller_ops from Andrew Donnellan - initialize distance lookup table from drconf path from Nikunj A Dadhania - enable RTC class support from Vaibhav Jain - disable automatically blocked PCI config from Gavin Shan - add LEDs driver for PowerNV platform from Vasant Hegde - fix endianness issues in the HVSI driver from Laurent Dufour - kexec endian fixes from Samuel Mendoza-Jonas - fix corrupted pdn list from Gavin Shan - fix fenced PHB caused by eeh_slot_error_detail() from Gavin Shan - Freescale updates from Scott: Highlights include 32-bit memcpy/memset optimizations, checksum optimizations, 85xx config fragments and updates, device tree updates, e6500 fixes for non-SMP, and misc cleanup and minor fixes. - a ton of cxl updates & fixes: - add explicit precision specifiers from Rasmus Villemoes - use more common format specifier from Rasmus Villemoes - destroy cxl_adapter_idr on module_exit from Johannes Thumshirn - destroy afu->contexts_idr on release of an afu from Johannes Thumshirn - compile with -Werror from Daniel Axtens - EEH support from Daniel Axtens - plug irq_bitmap getting leaked in cxl_context from Vaibhav Jain - add alternate MMIO error handling from Ian Munsie - allow release of contexts which have been OPENED but not STARTED from Andrew Donnellan - remove use of macro DEFINE_PCI_DEVICE_TABLE from Vaishali Thakkar - release irqs if memory allocation fails from Vaibhav Jain - remove racy attempt to force EEH invocation in reset from Daniel Axtens - fix + cleanup error paths in cxl_dev_context_init from Ian Munsie - fix force unmapping mmaps of contexts allocated through the kernel api from Ian Munsie - set up and enable PSL Timebase from Philippe Bergheaud * tag 'powerpc-4.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (140 commits) cxl: Set up and enable PSL Timebase cxl: Fix force unmapping mmaps of contexts allocated through the kernel api cxl: Fix + cleanup error paths in cxl_dev_context_init powerpc/eeh: Fix fenced PHB caused by eeh_slot_error_detail() powerpc/pseries: Cleanup on pci_dn_reconfig_notifier() powerpc/pseries: Fix corrupted pdn list powerpc/powernv: Enable LEDS support powerpc/iommu: Set default DMA offset in dma_dev_setup cxl: Remove racy attempt to force EEH invocation in reset cxl: Release irqs if memory allocation fails cxl: Remove use of macro DEFINE_PCI_DEVICE_TABLE powerpc/powernv: Fix mis-merge of OPAL support for LEDS driver powerpc/powernv: Reset HILE before kexec_sequence() powerpc/kexec: Reset secondary cpu endianness before kexec powerpc/hvsi: Fix endianness issues in the HVSI driver leds/powernv: Add driver for PowerNV platform powerpc/powernv: Create LED platform device powerpc/powernv: Add OPAL interfaces for accessing and modifying system LED states powerpc/powernv: Fix the log message when disabling VF cxl: Allow release of contexts which have been OPENED but not STARTED ...

powerpc/cell: Drop support for 64K local store on 4K kernels

2015-08-18T09:29:49Z

Back in the olden days we added support for using 64K pages to map the SPU (Synergistic Processing Unit) local store on Cell, when the main kernel was using 4K pages. This was useful at the time because distros were using 4K pages, but using 64K pages on the SPUs could reduce TLB pressure there. However these days the number of Cell users is approaching zero, and supporting this option adds unpleasant complexity to the memory management code. So drop the option, CONFIG_SPU_FS_64K_LS, and all related code. Signed-off-by: Michael Ellerman Acked-by: Jeremy Kerr

genirq/irqdomain: Allow irq domain aliasing

2015-07-29T22:14:36Z

It is not uncommon (at least with the ARM stuff) to have a piece of hardware that implements different flavours of "interrupts". A typical example of this is the GICv3 ITS, which implements standard PCI/MSI support, but also some form of "generic MSI". So far, the PCI/MSI domain is registered using the ITS device_node, so that irq_find_host can return it. On the contrary, the raw MSI domain is not registered with an device_node, making it impossible to be looked up by another subsystem (obviously, using the same device_node twice would only result in confusion, as it is not defined which one irq_find_host would return). A solution to this is to "type" domains that may be aliasing, and to be able to lookup an device_node that matches a given type. For this, we introduce irq_find_matching_host() as a superset of irq_find_host: struct irq_domain *irq_find_matching_host(struct device_node *node, enum irq_domain_bus_token bus_token); where bus_token is the "type" we want to match the domain against (so far, only DOMAIN_BUS_ANY is defined). This result in some moderately invasive changes on the PPC side (which is the only user of the .match method). This has otherwise no functionnal change. Reviewed-by: Hanjun Guo Signed-off-by: Marc Zyngier Cc: Cc: Yijing Wang Cc: Ma Jun Cc: Lorenzo Pieralisi Cc: Duc Dang Cc: Bjorn Helgaas Cc: Jiang Liu Cc: Jason Cooper Link: http://lkml.kernel.org/r/1438091186-10244-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner

powerpc/PCI: Use for_pci_msi_entry() to access MSI device list

2015-07-22T16:37:42Z

Use accessor for_each_pci_msi_entry() to access MSI device list, so we could easily move msi_list from struct pci_dev into struct device later. Signed-off-by: Jiang Liu Cc: Tony Luck Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Stuart Yoder Cc: Yijing Wang Cc: Borislav Petkov Cc: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Olof Johansson Cc: Gavin Shan Cc: Alexey Kardashevskiy Cc: David Gibson Cc: Daniel Axtens Cc: Wei Yang Cc: Nishanth Aravamudan Cc: Alexander Gordeev Cc: Scott Wood Cc: Laurentiu Tudor Cc: Tudor Laurentiu Cc: Hongtao Jia Link: http://lkml.kernel.org/r/1436428847-8886-4-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-05T02:36:06Z

Pull more vfs updates from Al Viro: "Assorted VFS fixes and related cleanups (IMO the most interesting in that part are f_path-related things and Eric's descriptor-related stuff). UFS regression fixes (it got broken last cycle). 9P fixes. fs-cache series, DAX patches, Jan's file_remove_suid() work" [ I'd say this is much more than "fixes and related cleanups". The file_table locking rule change by Eric Dumazet is a rather big and fundamental update even if the patch isn't huge. - Linus ] * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (49 commits) 9p: cope with bogus responses from server in p9_client_{read,write} p9_client_write(): avoid double p9_free_req() 9p: forgetting to cancel request on interrupted zero-copy RPC dax: bdev_direct_access() may sleep block: Add support for DAX reads/writes to block devices dax: Use copy_from_iter_nocache dax: Add block size note to documentation fs/file.c: __fget() and dup2() atomicity rules fs/file.c: don't acquire files->file_lock in fd_install() fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation vfs: avoid creation of inode number 0 in get_next_ino namei: make set_root_rcu() return void make simple_positive() public ufs: use dir_pages instead of ufs_dir_pages() pagemap.h: move dir_pages() over there remove the pointless include of lglock.h fs: cleanup slight list_entry abuse xfs: Correctly lock inode when removing suid and file capabilities fs: Call security_ops->inode_killpriv on truncate fs: Provide function telling whether file_remove_privs() will do anything ...

make simple_positive() public

2015-06-23T22:02:01Z

Signed-off-by: Al Viro

powerpc/iommu: Move tce_xxx callbacks from ppc_md to iommu_table

2015-06-11T05:14:56Z

This adds a iommu_table_ops struct and puts pointer to it into the iommu_table struct. This moves tce_build/tce_free/tce_get/tce_flush callbacks from ppc_md to the new struct where they really belong to. This adds the requirement for @it_ops to be initialized before calling iommu_init_table() to make sure that we do not leave any IOMMU table with iommu_table_ops uninitialized. This is not a parameter of iommu_init_table() though as there will be cases when iommu_init_table() will not be called on TCE tables, for example - VFIO. This does s/tce_build/set/, s/tce_free/clear/ and removes "tce_" redundant prefixes. This removes tce_xxx_rm handlers from ppc_md but does not add them to iommu_table_ops as this will be done later if we decide to support TCE hypercalls in real mode. This removes _vm callbacks as only virtual mode is supported by now so this also removes @rm parameter. For pSeries, this always uses tce_buildmulti_pSeriesLP/ tce_buildmulti_pSeriesLP. This changes multi callback to fall back to tce_build_pSeriesLP/tce_free_pSeriesLP if FW_FEATURE_MULTITCE is not present. The reason for this is we still have to support "multitce=off" boot parameter in disable_multitce() and we do not want to walk through all IOMMU tables in the system and replace "multi" callbacks with single ones. For powernv, this defines _ops per PHB type which are P5IOC2/IODA1/IODA2. This makes the callbacks for them public. Later patches will extend callbacks for IODA1/2. No change in behaviour is expected. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson Reviewed-by: Gavin Shan Signed-off-by: Michael Ellerman