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2013-09-11mm: migrate: check movability of hugepage in unmap_and_move_huge_page()Naoya Horiguchi1-0/+5
Currently hugepage migration works well only for pmd-based hugepages (mainly due to lack of testing,) so we had better not enable migration of other levels of hugepages until we are ready for it. Some users of hugepage migration (mbind, move_pages, and migrate_pages) do page table walk and check pud/pmd_huge() there, so they are safe. But the other users (softoffline and memory hotremove) don't do this, so without this patch they can try to migrate unexpected types of hugepages. To prevent this, we introduce hugepage_migration_support() as an architecture dependent check of whether hugepage are implemented on a pmd basis or not. And on some architecture multiple sizes of hugepages are available, so hugepage_migration_support() also checks hugepage size. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Rik van Riel <riel@redhat.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11Merge branch 'for-linus' of ↵Linus Torvalds20-122/+117
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull more s390 updates from Heiko Carstens: "This includes one bpf/jit bug fix where the jit compiler could sometimes write generated code out of bounds of the allocated memory area. The rest of the patches are only cleanups and minor improvements" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/irq: reduce size of external interrupt handler hash array s390/compat,uid16: use current_cred() s390/ap_bus: use and-mask instead of a cast s390/ftrace: avoid pointer arithmetics with function pointers s390: make various functions static, add declarations to header files s390/compat signal: add couple of __force annotations s390/mm: add __releases()/__acquires() annotations to gmap_alloc_table() s390: keep Kconfig sorted s390/irq: rework irq subclass handling s390/irq: use hlists for external interrupt handler array s390/dumpstack: convert print_symbol to %pSR s390/perf: Remove print_hex_dump_bytes() debug output s390: update defconfig s390/bpf,jit: fix address randomization
2013-09-09s390/irq: reduce size of external interrupt handler hash arrayHeiko Carstens1-2/+4
Change the hash algorithm a bit so it produces only values in the range of 0..31. This allows to reduce the size of the external interrupt handler hash array even further while making sure that each of the known interrupt sources keeps its unique hash with the slightly modified algorithm: 0x1004 --> 12 0x1201 --> 10 0x1202 --> 11 0x1406 --> 16 0x1407 --> 17 0x2401 --> 19 0x2603 --> 22 0x4000 --> 0 This also means that the entire array now fits into exactly one cache line; so add a proper align statement as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390/compat,uid16: use current_cred()Heiko Carstens1-4/+5
86a264ab "CRED: Wrap current->cred and a few other accessors" converted all uses of current->cred into current_cred() but left s390 alone. So let's convert s390 finally as well, only five years later. This way we also get rid of a sparse warning which complains about a possible invalid rcu dereference which however is a false positive. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390/ftrace: avoid pointer arithmetics with function pointersHeiko Carstens1-2/+2
Pointer arithmetics with function pointers is not really defined, but seems to do the right thing. Let's cast to a void pointer to have a defined behaviour, at least when using gcc. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390: make various functions static, add declarations to header filesHeiko Carstens8-16/+13
Make various functions static, add declarations to header files to fix a couple of sparse findings. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390/compat signal: add couple of __force annotationsHeiko Carstens1-5/+5
Add __force annotations to get rid of a couple of sparse warnings: arch/s390/kernel/compat_signal.c:335:35: warning: cast removes address space of expression Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390/mm: add __releases()/__acquires() annotations to gmap_alloc_table()Heiko Carstens1-1/+3
Let sparse not incorrectly complain about unbalanced locking. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-07s390: keep Kconfig sortedHeiko Carstens1-3/+3
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-06Merge tag 'soc-for-linus' of ↵Linus Torvalds2-5/+0
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform changes from Olof Johansson: "This branch contains mostly additions and changes to platform enablement and SoC-level drivers. Since there's sometimes a dependency on device-tree changes, there's also a fair amount of those in this branch. Pieces worth mentioning are: - Mbus driver for Marvell platforms, allowing kernel configuration and resource allocation of on-chip peripherals. - Enablement of the mbus infrastructure from Marvell PCI-e drivers. - Preparation of MSI support for Marvell platforms. - Addition of new PCI-e host controller driver for Tegra platforms - Some churn caused by sharing of macro names between i.MX 6Q and 6DL platforms in the device tree sources and header files. - Various suspend/PM updates for Tegra, including LP1 support. - Versatile Express support for MCPM, part of big little support. - Allwinner platform support for A20 and A31 SoCs (dual and quad Cortex-A7) - OMAP2+ support for DRA7, a new Cortex-A15-based SoC. The code that touches other architectures are patches moving MSI arch-specific functions over to weak symbols and removal of ARCH_SUPPORTS_MSI, acked by PCI maintainers" * tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (266 commits) tegra-cpuidle: provide stub when !CONFIG_CPU_IDLE PCI: tegra: replace devm_request_and_ioremap by devm_ioremap_resource ARM: tegra: Drop ARCH_SUPPORTS_MSI and sort list ARM: dts: vf610-twr: enable i2c0 device ARM: dts: i.MX51: Add one more I2C2 pinmux entry ARM: dts: i.MX51: Move pins configuration under "iomuxc" label ARM: dtsi: imx6qdl-sabresd: Add USB OTG vbus pin to pinctrl_hog ARM: dtsi: imx6qdl-sabresd: Add USB host 1 VBUS regulator ARM: dts: imx27-phytec-phycore-som: Enable AUDMUX ARM: dts: i.MX27: Disable AUDMUX in the template ARM: dts: wandboard: Add support for SDIO bcm4329 ARM: i.MX5 clocks: Remove optional clock setup (CKIH1) from i.MX51 template ARM: dts: imx53-qsb: Make USBH1 functional ARM i.MX6Q: dts: Enable I2C1 with EEPROM and PMIC on Phytec phyFLEX-i.MX6 Ouad module ARM i.MX6Q: dts: Enable SPI NOR flash on Phytec phyFLEX-i.MX6 Ouad module ARM: dts: imx6qdl-sabresd: Add touchscreen support ARM: imx: add ocram clock for imx53 ARM: dts: imx: ocram size is different between imx6q and imx6dl ARM: dts: imx27-phytec-phycore-som: Fix regulator settings ARM: dts: i.MX27: Remove clock name from CPU node ...
2013-09-05Merge branch 'for-linus' of ↵Linus Torvalds5-106/+93
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs pile 1 from Al Viro: "Unfortunately, this merge window it'll have a be a lot of small piles - my fault, actually, for not keeping #for-next in anything that would resemble a sane shape ;-/ This pile: assorted fixes (the first 3 are -stable fodder, IMO) and cleanups + %pd/%pD formats (dentry/file pathname, up to 4 last components) + several long-standing patches from various folks. There definitely will be a lot more (starting with Miklos' check_submount_and_drop() series)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits) direct-io: Handle O_(D)SYNC AIO direct-io: Implement generic deferred AIO completions add formats for dentry/file pathnames kvm eventfd: switch to fdget powerpc kvm: use fdget switch fchmod() to fdget switch epoll_ctl() to fdget switch copy_module_from_fd() to fdget git simplify nilfs check for busy subtree ibmasmfs: don't bother passing superblock when not needed don't pass superblock to hypfs_{mkdir,create*} don't pass superblock to hypfs_diag_create_files don't pass superblock to hypfs_vm_create_files() oprofile: get rid of pointless forward declarations of struct super_block oprofilefs_create_...() do not need superblock argument oprofilefs_mkdir() doesn't need superblock argument don't bother with passing superblock to oprofile_create_stats_files() oprofile: don't bother with passing superblock to ->create_files() don't bother passing sb to oprofile_create_files() coh901318: don't open-code simple_read_from_buffer() ...
2013-09-04Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds10-116/+195
Pull KVM updates from Gleb Natapov: "The highlights of the release are nested EPT and pv-ticketlocks support (hypervisor part, guest part, which is most of the code, goes through tip tree). Apart of that there are many fixes for all arches" Fix up semantic conflicts as discussed in the pull request thread.. * 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (88 commits) ARM: KVM: Add newlines to panic strings ARM: KVM: Work around older compiler bug ARM: KVM: Simplify tracepoint text ARM: KVM: Fix kvm_set_pte assignment ARM: KVM: vgic: Bump VGIC_NR_IRQS to 256 ARM: KVM: Bugfix: vgic_bytemap_get_reg per cpu regs ARM: KVM: vgic: fix GICD_ICFGRn access ARM: KVM: vgic: simplify vgic_get_target_reg KVM: MMU: remove unused parameter KVM: PPC: Book3S PR: Rework kvmppc_mmu_book3s_64_xlate() KVM: PPC: Book3S PR: Make instruction fetch fallback work for system calls KVM: PPC: Book3S PR: Don't corrupt guest state when kernel uses VMX KVM: x86: update masterclock when kvmclock_offset is calculated (v2) KVM: PPC: Book3S: Fix compile error in XICS emulation KVM: PPC: Book3S PR: return appropriate error when allocation fails arch: powerpc: kvm: add signed type cast for comparation KVM: x86: add comments where MMIO does not return to the emulator KVM: vmx: count exits to userspace during invalid guest emulation KVM: rename __kvm_io_bus_sort_cmp to kvm_io_bus_cmp kvm: optimize away THP checks in kvm_is_mmio_pfn() ...
2013-09-04Merge tag 'PTR_RET-for-linus' of ↵Linus Torvalds2-5/+9
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull PTR_RET() removal patches from Rusty Russell: "PTR_RET() is a weird name, and led to some confusing usage. We ended up with PTR_ERR_OR_ZERO(), and replacing or fixing all the usages. This has been sitting in linux-next for a whole cycle" [ There are still some PTR_RET users scattered about, with some of them possibly being new, but most of them existing in Rusty's tree too. We have that #define PTR_RET(p) PTR_ERR_OR_ZERO(p) thing in <linux/err.h>, so they continue to work for now - Linus ] * tag 'PTR_RET-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: GFS2: Replace PTR_RET with PTR_ERR_OR_ZERO Btrfs: volume: Replace PTR_RET with PTR_ERR_OR_ZERO drm/cma: Replace PTR_RET with PTR_ERR_OR_ZERO sh_veu: Replace PTR_RET with PTR_ERR_OR_ZERO dma-buf: Replace PTR_RET with PTR_ERR_OR_ZERO drivers/rtc: Replace PTR_RET with PTR_ERR_OR_ZERO mm/oom_kill: remove weird use of ERR_PTR()/PTR_ERR(). staging/zcache: don't use PTR_RET(). remoteproc: don't use PTR_RET(). pinctrl: don't use PTR_RET(). acpi: Replace weird use of PTR_RET. s390: Replace weird use of PTR_RET. PTR_RET is now PTR_ERR_OR_ZERO(): Replace most. PTR_RET is now PTR_ERR_OR_ZERO
2013-09-04Merge branch 'timers-nohz-for-linus' of ↵Linus Torvalds3-3/+8
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timers/nohz changes from Ingo Molnar: "It mostly contains fixes and full dynticks off-case optimizations, by Frederic Weisbecker" * 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) nohz: Include local CPU in full dynticks global kick nohz: Optimize full dynticks's sched hooks with static keys nohz: Optimize full dynticks state checks with static keys nohz: Rename a few state variables vtime: Always debug check snapshot source _before_ updating it vtime: Always scale generic vtime accounting results vtime: Optimize full dynticks accounting off case with static keys vtime: Describe overriden functions in dedicated arch headers m68k: hardirq_count() only need preempt_mask.h hardirq: Split preempt count mask definitions context_tracking: Split low level state headers vtime: Fix racy cputime delta update vtime: Remove a few unneeded generic vtime state checks context_tracking: User/kernel broundary cross trace events context_tracking: Optimize context switch off case with static keys context_tracking: Optimize guest APIs off case with static key context_tracking: Optimize main APIs off case with static key context_tracking: Ground setup for static key use context_tracking: Remove full dynticks' hacky dependency on wide context tracking nohz: Only enable context tracking on full dynticks CPUs ...
2013-09-04s390/irq: rework irq subclass handlingHeiko Carstens6-51/+32
Let's not add a function for every external interrupt subclass for which we need reference counting. Just have two register/unregister functions which have a subclass parameter: void irq_subclass_register(enum irq_subclass subclass); void irq_subclass_unregister(enum irq_subclass subclass); Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390/irq: use hlists for external interrupt handler arrayHeiko Carstens1-12/+12
Use hlists for the hashed array of external interrupt handlers. Reduces the size of the array by 50% (2KB). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390/dumpstack: convert print_symbol to %pSRHeiko Carstens1-10/+10
This is the same as what other architectures did. The change has also the advantage that there won't be any interleaving messages between printk() and print_symbol(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390/perf: Remove print_hex_dump_bytes() debug outputHendrik Brueckner1-4/+1
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390: update defconfigHeiko Carstens1-12/+27
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-04s390/bpf,jit: fix address randomizationHeiko Carstens1-1/+1
Add misssing braces to hole calculation. This resulted in an addition instead of an substraction. Which in turn means that the jit compiler could try to write out of bounds of the allocated piece of memory. This bug was introduced with aa2d2c73 "s390/bpf,jit: address randomize and write protect jit code". Fixes this one: [ 37.320956] Unable to handle kernel pointer dereference at virtual kernel address 000003ff80231000 [ 37.320984] Oops: 0011 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 37.320993] Modules linked in: dm_multipath scsi_dh eadm_sch dm_mod ctcm fsm autofs4 [ 37.321007] CPU: 28 PID: 6443 Comm: multipathd Not tainted 3.10.9-61.x.20130829-s390xdefault #1 [ 37.321011] task: 0000004ada778000 ti: 0000004ae3304000 task.ti: 0000004ae3304000 [ 37.321014] Krnl PSW : 0704c00180000000 000000000012d1de (bpf_jit_compile+0x198e/0x23d0) [ 37.321022] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3 Krnl GPRS: 000000004350207d 0000004a00000001 0000000000000007 000003ff80231002 [ 37.321029] 0000000000000007 000003ff80230ffe 00000000a7740000 000003ff80230f76 [ 37.321032] 000003ffffffffff 000003ff00000000 000003ff0000007d 000000000071e820 [ 37.321035] 0000004adbe99950 000000000071ea18 0000004af3d9e7c0 0000004ae3307b80 [ 37.321046] Krnl Code: 000000000012d1d0: 41305004 la %r3,4(%r5) 000000000012d1d4: e330f0f80021 clg %r3,248(%r15) #000000000012d1da: a7240009 brc 2,12d1ec >000000000012d1de: 50805000 st %r8,0(%r5) 000000000012d1e2: e330f0f00004 lg %r3,240(%r15) 000000000012d1e8: 41303004 la %r3,4(%r3) 000000000012d1ec: e380f0e00004 lg %r8,224(%r15) 000000000012d1f2: e330f0f00024 stg %r3,240(%r15) [ 37.321074] Call Trace: [ 37.321077] ([<000000000012da78>] bpf_jit_compile+0x2228/0x23d0) [ 37.321083] [<00000000006007c2>] sk_attach_filter+0xfe/0x214 [ 37.321090] [<00000000005d2d92>] sock_setsockopt+0x926/0xbdc [ 37.321097] [<00000000005cbfb6>] SyS_setsockopt+0x8a/0xe8 [ 37.321101] [<00000000005ccaa8>] SyS_socketcall+0x264/0x364 [ 37.321106] [<0000000000713f1c>] sysc_nr_ok+0x22/0x28 [ 37.321113] [<000003fffce10ea8>] 0x3fffce10ea8 [ 37.321118] INFO: lockdep is turned off. [ 37.321121] Last Breaking-Event-Address: [ 37.321124] [<000000000012d192>] bpf_jit_compile+0x1942/0x23d0 [ 37.321132] [ 37.321135] Kernel panic - not syncing: Fatal exception: panic_on_oops Cc: stable@vger.kernel.org # v3.11 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2013-09-03don't pass superblock to hypfs_{mkdir,create*}Al Viro4-46/+39
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-03don't pass superblock to hypfs_diag_create_filesAl Viro3-30/+26
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-03don't pass superblock to hypfs_vm_create_files()Al Viro3-36/+35
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-03oprofilefs_create_...() do not need superblock argumentAl Viro1-13/+13
same story as with oprofilefs_mkdir() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-03oprofilefs_mkdir() doesn't need superblock argumentAl Viro1-3/+3
it's always equal to ->d_sb of the second argument (parent dentry), due to either being literally that, or ->d_sb of parent's parent. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-03oprofile: don't bother with passing superblock to ->create_files()Al Viro1-18/+17
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-30s390/pci: use virtual memory for iommu bitmapSebastian Ott1-9/+3
The bitmap used to mark dma mappings can be quite large on systems with huge amounts of memory. Use virtual memory for this bitmap. Suggested-by: Alexander Schmidt <alexschm@de.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/pci: update function handle after resume from hibernateSebastian Ott4-5/+45
Function handles may change while the system was in hibernation use list pci functions and update the function handles. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/pci: try harder to modify a functionSebastian Ott1-2/+2
In rare situations a PCI function can report a busy condition when we issue the modify pci function command. A temporary busy condition can exceed 1 second but not 2 seconds. Increase the time until we report an error to 2 seconds. Also increase the time we sleep between the retries to reduce the load in this case. Suggested-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/pci: split lpfSebastian Ott4-54/+72
List pci functions is used to query and iterate over pci functions. This function currently has 2 users - initial device discovery and rescan after a machine check. Instead of having a multipurpose function pass a callback which gets called for each pci function. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/hibernate: add early resume functionSebastian Ott3-5/+12
Some functions that do arch specific resume actions are called directly from swsusp_asm64.S . Before we add another function call provide a generic s390_early_resume function which can be used for this purpose. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/pci: add recover sysfs knobSebastian Ott2-2/+29
Add an arch specific attribute to recover a pci function from an error state or config space blockage. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/pci: use claim_resourceSebastian Ott1-29/+34
Use pci_claim_resource to find and request bus ressources in pcibios_add_device. Also move some (de)initialization stuff to pcibios_enable_device/pcibios_disable_device. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-30s390/pci/hotplug: convert to be builtin onlySebastian Ott2-41/+17
Convert s390' pci hotplug to be builtin only, with no module option. Suggested-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-29s390/mm: implement software referenced bitsMartin Schwidefsky5-187/+244
The last remaining use for the storage key of the s390 architecture is reference counting. The alternative is to make page table entries invalid while they are old. On access the fault handler marks the pte/pmd as young which makes the pte/pmd valid if the access rights allow read access. The pte/pmd invalidations required for software managed reference bits cost a bit of performance, on the other hand the RRBE/RRBM instructions to read and reset the referenced bits are quite expensive as well. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-28s390/tx: allow program interruption filtering in user spaceMartin Schwidefsky1-3/+3
A user space program using the transactional execution facility should be allowed to do program interrupt filtering. Do not set the transactional-execution program-interruption-filtering override (PIFO) bit in CR0. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-28s390/pgtable: fix mprotect for single-threaded KVM guestsMartin Schwidefsky1-0/+1
For a single-threaded KVM guest ptep_modify_prot_start will not use IPTE, the invalid bit will therefore not be set. If DEBUG_VM is set pgste_set_key called by ptep_modify_prot_commit will complain about the missing invalid bit. ptep_modify_prot_start should set the invalid bit in all cases. Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-28s390/time: return with irqs disabled from psw_idleMartin Schwidefsky5-6/+4
Modify the psw_idle waiting logic in entry[64].S to return with interrupts disabled. This avoids potential issues with udelay and interrupt loops as interrupts are not reenabled after clock comparator interrupts. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/kprobes: add support for compare and branch instructionsHeiko Carstens1-2/+19
The compare and branch instructions (not relative) all need special handling when kprobed: - if a branch was taken, the instruction pointer should be left alone - if a branch was not taken, the instruction pointer must be adjusted The compare and branch instructions family was introduced with the general instruction extension facility (z10). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/switch_to: fix save_access_regs() / restore_access_regs()Heiko Carstens1-2/+7
Fix broken contraints for both save_access_regs() and restore_access_regs(). The constraints are incorrect since they tell the compiler that the inline assemblies only access the first element of an array of 16 elements. Therefore the compiler could generate incorrect code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/bitops: fix inline assembly constraintsHeiko Carstens1-6/+6
Fix inline assembly contraints for non atomic bitops functions. This is broken since 2.6.34 987bcdac "[S390] use inline assembly contraints available with gcc 3.3.3". Reported-by: Andreas Krebbel <krebbel@linux.vnet.ibm.com> Reported-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/mm: introduce ptep_flush_lazy helperMartin Schwidefsky5-25/+24
Isolate the logic of IDTE vs. IPTE flushing of ptes in two functions, ptep_flush_lazy and __tlb_flush_mm_lazy. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/time: clock comparator revalidationMartin Schwidefsky1-4/+1
Always use the S390_lowcore.clock_comparator field to revalidate the clock comparator CPU register after a machine check. This avoids an unnecssary external interrupt after a machine check if no timer is pending. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/pgtable: add pgste_get helperMartin Schwidefsky1-1/+10
ptep_modify_prot_start uses the pgste_set helper to store the pgste, while ptep_modify_prot_commit uses its own pointer magic to retrieve the value again. Add the pgste_get help function to keep things symmetrical and improve readability. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/pgtable: skip pgste updates on full flushMartin Schwidefsky1-4/+3
On process exit there is no more need for the pgste information. Skip the expensive storage key operations which should speed up termination of KVM processes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/mm: cleanup page table definitionsMartin Schwidefsky10-325/+333
Improve the encoding of the different pte types and the naming of the page, segment table and region table bits. Due to the different pte encoding the hugetlbfs primitives need to be adapted as well. To improve compatability with common code make the huge ptes use the encoding of normal ptes. The conversion between the pte and pmd encoding for a huge pte is done with set_huge_pte_at and huge_ptep_get. Overall the code is now easier to understand. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/mm: remove dead pfmf inline assemblyHeiko Carstens1-10/+0
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390: convert interrupt handling to use generic hardirqMartin Schwidefsky12-455/+207
With the introduction of PCI it became apparent that s390 should convert to generic hardirqs as too many drivers do not have the correct dependency for GENERIC_HARDIRQS. On the architecture level s390 does not have irq lines. It has external interrupts, I/O interrupts and adapter interrupts. This patch hard-codes all external interrupts as irq #1, all I/O interrupts as irq #2 and all adapter interrupts as irq #3. The additional information from the lowcore associated with the interrupt is stored in the pt_regs of the interrupt frame, where the interrupt handler can pick it up. For PCI/MSI interrupts the adapter interrupt handler scans the relevant bit fields and calls generic_handle_irq with the virtual irq number for the MSI interrupt. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/pci: use adapter interrupt vector helpersMartin Schwidefsky3-208/+165
Make use of the adapter interrupt helpers in the PCI code. This is the first step to convert the MSI interrupt code to PCI domains. The patch removes the limitation of 64 adapter interrupts per PCI function. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-08-22s390/pci: cleanup function namesMartin Schwidefsky5-28/+28
Rename s390pci_xyz to zpci_xxz and set_irq_ctrl to zpci_set_irq_ctrl. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 17:49:13 +0000