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2013-04-30powerpc: New hugepage directory formatAneesh Kumar K.V
Change the hugepage directory format so that we can have leaf ptes directly at page directory avoiding the allocation of hugepage directory. With the new table format we have 3 cases for pgds and pmds: (1) invalid (all zeroes) (2) pointer to next table, as normal; bottom 6 bits == 0 (4) hugepd pointer, bottom two bits == 00, next 4 bits indicate size of table Instead of storing shift value in hugepd pointer we use mmu_psize_def index so that we can fit all the supported hugepage size in 4 bits Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc: Don't truncate pgd_index wronglyAneesh Kumar K.V
With PGD_INDEX_SIZE set to 12 the existing macro doesn't work. Fix it to use PTRS_PER_PGD The idea originally was to have one more bit in the result of pgd_index() than PGD_INDEX_SIZE, so that if one had an address corresponding to the last PGD entry, and then incremented that address by PGD_SIZE, and took pgd_index() of that, you wouldn't end up with zero. The commit that introduced that dates back to 2002, and the code that was sensitive to that edge case has long since been refactored (several times), so there is no need for it these days. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc: Don't hard code the size of pte pageAneesh Kumar K.V
USE PTRS_PER_PTE to indicate the size of pte page. To support THP, later patches will be changing PTRS_PER_PTE value. Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc: Save DAR and DSISR in pt_regs on MCEAneesh Kumar K.V
We were not saving DAR and DSISR on MCE. Save then and also print the values along with exception details in xmon. Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc: Use signed formatting when printing errorAneesh Kumar K.V
PAPR defines these errors as negative values. So print them accordingly for easy debugging. Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc/pseries: Correct builds break when CONFIG_SMP not definedNathan Fontenot
Correct build failure for powerpc/pseries builds with CONFIG_SMP not defined. The function cpu_sibling_mask has no meaning (or definition) when CONFIG_SMP is not defined. Additionally, the updating of NUMA affinity for a CPU in a UP system doesn't really make sense. This patch ifdef's out the code making the affinity updates for PRRN events to fix the following build break. arch/powerpc/mm/numa.c: In function ‘stage_topology_update’: arch/powerpc/mm/numa.c:1535: error: implicit declaration of function ‘cpu_sibling_mask’ arch/powerpc/mm/numa.c:1535: warning: passing argument 3 of ‘cpumask_or’ makes pointer from integer without a cast make[1]: *** [arch/powerpc/mm/numa.o] Error 1 Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc/booke: Remove obsolete macro FINISH_EXCEPTIONKevin Hao
This is stale and not used by anyone now. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc/rtas_flash: Fix bad memory accessVasant Hegde
We use kmem_cache_alloc() to allocate memory to hold the new firmware which will be flashed. kmem_cache_alloc() calls rtas_block_ctor() to set memory to NULL. But these constructor is called only for newly allocated slabs. If we run below command multiple time without rebooting, allocator may allocate memory from the area which was free'd by kmem_cache_free and it will not call constructor. In this situation we may hit kernel oops. dd if=<fw image> of=/proc/ppc64/rtas/firmware_flash bs=4096 oops message: ------------- [ 1602.399755] Oops: Kernel access of bad area, sig: 11 [#1] [ 1602.399772] SMP NR_CPUS=1024 NUMA pSeries [ 1602.399779] Modules linked in: rtas_flash nfsd lockd auth_rpcgss nfs_acl sunrpc fuse loop dm_mod sg ipv6 ses enclosure ehea ehci_pci ohci_hcd ehci_hcd usbcore sd_mod usb_common crc_t10dif scsi_dh_alua scsi_dh_emc scsi_dh_hp_sw scsi_dh_rdac scsi_dh ipr libata scsi_mod [ 1602.399817] NIP: d00000000a170b9c LR: d00000000a170b64 CTR: c00000000079cd58 [ 1602.399823] REGS: c0000003b9937930 TRAP: 0300 Not tainted (3.9.0-rc4-0.27-ppc64) [ 1602.399828] MSR: 8000000000009032 <SF,EE,ME,IR,DR,RI> CR: 22000428 XER: 20000000 [ 1602.399841] SOFTE: 1 [ 1602.399844] CFAR: c000000000005f24 [ 1602.399848] DAR: 8c2625a820631fef, DSISR: 40000000 [ 1602.399852] TASK = c0000003b4520760[3655] 'dd' THREAD: c0000003b9934000 CPU: 3 GPR00: 8c2625a820631fe7 c0000003b9937bb0 d00000000a179f28 d00000000a171f08 GPR04: 0000000010040000 0000000000001000 c0000003b9937df0 c0000003b5fb2080 GPR08: c0000003b58f7200 d00000000a179f28 c0000003b40058d4 c00000000079cd58 GPR12: d00000000a171450 c000000007f40900 0000000000000005 0000000010178d20 GPR16: 00000000100cb9d8 000000000000001d 0000000000000000 000000001003ffff GPR20: 0000000000000001 0000000000000000 00003fffa0b50d30 000000001001f010 GPR24: 0000000010020888 0000000010040000 d00000000a171f08 d00000000a172808 GPR28: 0000000000001000 0000000010040000 c0000003b4005880 8c2625a820631fe7 [ 1602.399924] NIP [d00000000a170b9c] .rtas_flash_write+0x7c/0x1e8 [rtas_flash] [ 1602.399930] LR [d00000000a170b64] .rtas_flash_write+0x44/0x1e8 [rtas_flash] [ 1602.399934] Call Trace: [ 1602.399939] [c0000003b9937bb0] [d00000000a170b64] .rtas_flash_write+0x44/0x1e8 [rtas_flash] (unreliable) [ 1602.399948] [c0000003b9937c60] [c000000000282830] .proc_reg_write+0x90/0xe0 [ 1602.399955] [c0000003b9937ce0] [c0000000001ff374] .vfs_write+0x114/0x238 [ 1602.399961] [c0000003b9937d80] [c0000000001ff5d8] .SyS_write+0x70/0xe8 [ 1602.399968] [c0000003b9937e30] [c000000000009cdc] syscall_exit+0x0/0xa0 [ 1602.399973] Instruction dump: [ 1602.399977] eb698010 801b0028 2f80dcd6 419e00a4 2fbc0000 419e009c ebfb0030 2fbf0000 [ 1602.399989] 409e0010 480000d8 60000000 7c1f0378 <e81f0008> 2fa00000 409efff4 e81f0000 [ 1602.400012] ---[ end trace b4136d115dc31dac ]--- [ 1602.402178] [ 1602.402185] Sending IPI to other CPUs [ 1602.403329] IPI complete This patch uses kmem_cache_zalloc() instead of kmem_cache_alloc() to allocate memory, which makes sure memory is set to 0 before using. Also removes rtas_block_ctor(), which is no longer required. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc: Fix build failure after merge of the cgroup treeStephen Rothwell
After merging the cgroup tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: arch/powerpc/mm/numa.c: In function 'arch_update_cpu_topology': arch/powerpc/mm/numa.c:1465:2: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration] arch/powerpc/mm/numa.c:1465:10: error: assignment makes pointer from integer without a cast [-Werror] arch/powerpc/mm/numa.c:1497:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration] Caused by commit 30c05350c39d ("powerpc/pseries: Use stop machine to update cpu maps") from the powerpc tree interacting with (probably) commit ff794dea52ea ("cpuset: remove include of cgroup.h from cpuset.h") from the cgroup tree. Removing includes from header files is fraught with danger ... The former should have added an include of linux/slab.h to arch/powerpc/mm/numa.c. I have added the following merge fix patch for today (but it should be applied to the powerpc tree ASAP). From: Stephen Rothwell <sfr@canb.auug.org.au> Date: Mon, 29 Apr 2013 14:01:44 +1000 Subject: [PATCH] powerpc: numa.c: using kzalloc/kfree requires including slab.h fixes these build errors: arch/powerpc/mm/numa.c: In function 'arch_update_cpu_topology': arch/powerpc/mm/numa.c:1465:2: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration] arch/powerpc/mm/numa.c:1465:10: error: assignment makes pointer from integer without a cast [-Werror] arch/powerpc/mm/numa.c:1497:2: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30powerpc: Fix usage of setup_pci_atmu()Michael Neuling
Linux next is currently failing to compile mpc85xx_defconfig with: arch/powerpc/sysdev/fsl_pci.c:944:2: error: too many arguments to function 'setup_pci_atmu' This is caused by (from Kumar's next branch): commit 34642bbb3d12121333efcf4ea7dfe66685e403a1 Author: Kumar Gala <galak@kernel.crashing.org> powerpc/fsl-pci: Keep PCI SoC controller registers in pci_controller Which changed definition of setup_pci_atmu() but didn't update one of the callers. Below fixes this. Signed-off-by: Michael Neuling <mikey@neuling.org> Reviewed-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-29Merge branch 'akpm' (incoming from Andrew)Linus Torvalds
Merge second batch of fixes from Andrew Morton: - various misc bits - some printk updates - a new "SRAM" driver. - MAINTAINERS updates - the backlight driver queue - checkpatch updates - a few init/ changes - a huge number of drivers/rtc changes - fatfs updates - some lib/idr.c work - some renaming of the random driver interfaces * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (285 commits) net: rename random32 to prandom net/core: remove duplicate statements by do-while loop net/core: rename random32() to prandom_u32() net/netfilter: rename random32() to prandom_u32() net/sched: rename random32() to prandom_u32() net/sunrpc: rename random32() to prandom_u32() scsi: rename random32() to prandom_u32() lguest: rename random32() to prandom_u32() uwb: rename random32() to prandom_u32() video/uvesafb: rename random32() to prandom_u32() mmc: rename random32() to prandom_u32() drbd: rename random32() to prandom_u32() kernel/: rename random32() to prandom_u32() mm/: rename random32() to prandom_u32() lib/: rename random32() to prandom_u32() x86: rename random32() to prandom_u32() x86: pageattr-test: remove srandom32 call uuid: use prandom_bytes() raid6test: use prandom_bytes() sctp: convert sctp_assoc_set_id() to use idr_alloc_cyclic() ...
2013-04-29Merge branch 'for-3.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup updates from Tejun Heo: - Fixes and a lot of cleanups. Locking cleanup is finally complete. cgroup_mutex is no longer exposed to individual controlelrs which used to cause nasty deadlock issues. Li fixed and cleaned up quite a bit including long standing ones like racy cgroup_path(). - device cgroup now supports proper hierarchy thanks to Aristeu. - perf_event cgroup now supports proper hierarchy. - A new mount option "__DEVEL__sane_behavior" is added. As indicated by the name, this option is to be used for development only at this point and generates a warning message when used. Unfortunately, cgroup interface currently has too many brekages and inconsistencies to implement a consistent and unified hierarchy on top. The new flag is used to collect the behavior changes which are necessary to implement consistent unified hierarchy. It's likely that this flag won't be used verbatim when it becomes ready but will be enabled implicitly along with unified hierarchy. The option currently disables some of broken behaviors in cgroup core and also .use_hierarchy switch in memcg (will be routed through -mm), which can be used to make very unusual hierarchy where nesting is partially honored. It will also be used to implement hierarchy support for blk-throttle which would be impossible otherwise without introducing a full separate set of control knobs. This is essentially versioning of interface which isn't very nice but at this point I can't see any other options which would allow keeping the interface the same while moving towards hierarchy behavior which is at least somewhat sane. The planned unified hierarchy is likely to require some level of adaptation from userland anyway, so I think it'd be best to take the chance and update the interface such that it's supportable in the long term. Maintaining the existing interface does complicate cgroup core but shouldn't put too much strain on individual controllers and I think it'd be manageable for the foreseeable future. Maybe we'll be able to drop it in a decade. Fix up conflicts (including a semantic one adding a new #include to ppc that was uncovered by header the file changes) as per Tejun. * 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (45 commits) cpuset: fix compile warning when CONFIG_SMP=n cpuset: fix cpu hotplug vs rebuild_sched_domains() race cpuset: use rebuild_sched_domains() in cpuset_hotplug_workfn() cgroup: restore the call to eventfd->poll() cgroup: fix use-after-free when umounting cgroupfs cgroup: fix broken file xattrs devcg: remove parent_cgroup. memcg: force use_hierarchy if sane_behavior cgroup: remove cgrp->top_cgroup cgroup: introduce sane_behavior mount option move cgroupfs_root to include/linux/cgroup.h cgroup: convert cgroupfs_root flag bits to masks and add CGRP_ prefix cgroup: make cgroup_path() not print double slashes Revert "cgroup: remove bind() method from cgroup_subsys." perf: make perf_event cgroup hierarchical cgroup: implement cgroup_is_descendant() cgroup: make sure parent won't be destroyed before its children cgroup: remove bind() method from cgroup_subsys. devcg: remove broken_hierarchy tag cgroup: remove cgroup_lock_is_held() ...
2013-04-29early_printk: consolidate random copies of identical codeThomas Gleixner
The early console implementations are the same all over the place. Move the print function to kernel/printk and get rid of the copies. [akpm@linux-foundation.org: arch/mips/kernel/early_printk.c needs kernel.h for va_list] [paul.gortmaker@windriver.com: sh4: make the bios early console support depend on EARLY_PRINTK] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Richard Weinberger <richard@nod.at> Reviewed-by: Ingo Molnar <mingo@kernel.org> Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-30Merge remote-tracking branch 'kumar/next' into nextBenjamin Herrenschmidt
From Kumar Gala: << Add support for T4 and B4 SoC families from Freescale, e6500 altivec support, some various board fixes and other minor cleanups. >>
2013-04-30Merge remote-tracking branch 'agust/next' into nextBenjamin Herrenschmidt
From Anatolij Gustschin: << There are some changes for mpc5121 generic platform code to support mpc5125 SoC and DTS files for ac14xx and MPC5125-TWR boards. >>
2013-04-30mm: use vm_unmapped_area() on powerpc architectureMichel Lespinasse
Update the powerpc slice_get_unmapped_area function to make use of vm_unmapped_area() instead of implementing a brute force search. Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Tested-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-30mm: remove free_area_cache use in powerpc architectureMichel Lespinasse
As all other architectures have been converted to use vm_unmapped_area(), we are about to retire the free_area_cache. This change simply removes the use of that cache in slice_get_unmapped_area(), which will most certainly have a performance cost. Next one will convert that function to use the vm_unmapped_area() infrastructure and regain the performance. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-04-29mm, hotplug: avoid compiling memory hotremove functions when disabledDavid Rientjes
__remove_pages() is only necessary for CONFIG_MEMORY_HOTREMOVE. PowerPC pseries will return -EOPNOTSUPP if unsupported. Adding an #ifdef causes several other functions it depends on to also become unnecessary, which saves in .text when disabled (it's disabled in most defconfigs besides powerpc, including x86). remove_memory_block() becomes static since it is not referenced outside of drivers/base/memory.c. Build tested on x86 and powerpc with CONFIG_MEMORY_HOTREMOVE both enabled and disabled. Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Toshi Kani <toshi.kani@hp.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Wen Congyang <wency@cn.fujitsu.com> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29powerpc/mm/numa: use setup_nr_node_ids() instead of opencoding.Cody P Schafer
[sfr@canb.auug.org.au: add missing semicolon] Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29sparse-vmemmap: specify vmemmap population range in bytesJohannes Weiner
The sparse code, when asking the architecture to populate the vmemmap, specifies the section range as a starting page and a number of pages. This is an awkward interface, because none of the arch-specific code actually thinks of the range in terms of 'struct page' units and always translates it to bytes first. In addition, later patches mix huge page and regular page backing for the vmemmap. For this, they need to call vmemmap_populate_basepages() on sub-section ranges with PAGE_SIZE and PMD_SIZE in mind. But these are not necessarily multiples of the 'struct page' size and so this unit is too coarse. Just translate the section range into bytes once in the generic sparse code, then pass byte ranges down the stack. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Bernhard Schmidt <Bernhard.Schmidt@lrz.de> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: David S. Miller <davem@davemloft.net> Tested-by: David S. Miller <davem@davemloft.net> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29mm/hugetlb: add more arch-defined huge_pte functionsGerald Schaefer
Commit abf09bed3cce ("s390/mm: implement software dirty bits") introduced another difference in the pte layout vs. the pmd layout on s390, thoroughly breaking the s390 support for hugetlbfs. This requires replacing some more pte_xxx functions in mm/hugetlbfs.c with a huge_pte_xxx version. This patch introduces those huge_pte_xxx functions and their generic implementation in asm-generic/hugetlb.h, which will now be included on all architectures supporting hugetlbfs apart from s390. This change will be a no-op for those architectures. [akpm@linux-foundation.org: fix warning] Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: Hillf Danton <dhillf@gmail.com> Acked-by: Michal Hocko <mhocko@suse.cz> [for !s390 parts] Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29mm/PPC: use free_highmem_page() to free highmem pages into buddy systemJiang Liu
Use helper function free_highmem_page() to free highmem pages into the buddy system. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Alexander Graf <agraf@suse.de> Cc: "Suzuki K. Poulose" <suzuki@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29mm/ppc: use common help functions to free reserved pagesJiang Liu
Use common help functions to free reserved pages. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Anatolij Gustschin <agust@denx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29powerpc/fsl-booke: add the reg prop for pci bridge device node for T4/B4Kevin Hao
The reg property in the pci bridge device node is used to bind this device node to the pci bridge device. Then all the pci devices under this bridge could use the interrupt maps defined in this device node to do the irq translation. So if this property is missed, the pci traditional irq mechanism will not work. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2013-04-29powerpc/fsl-pci: don't unmap the PCI SoC controller registers in setup_pci_atmuKevin Hao
In patch 34642bbb (powerpc/fsl-pci: Keep PCI SoC controller registers in pci_controller) we choose to keep the map of the PCI SoC controller registers. But we missed to delete the unmap in setup_pci_atmu function. This will cause the following call trace once we access the PCI SoC controller registers later. Unable to handle kernel paging request for data at address 0x8000080080040f14 Faulting instruction address: 0xc00000000002ea58 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=24 T4240 QDS Modules linked in: NIP: c00000000002ea58 LR: c00000000002eaf4 CTR: c00000000002eac0 REGS: c00000017e10b4a0 TRAP: 0300 Not tainted (3.9.0-rc1-00052-gfa3529f-dirty) MSR: 0000000080029000 <CE,EE,ME> CR: 28adbe22 XER: 00000000 SOFTE: 0 DEAR: 8000080080040f14, ESR: 0000000000000000 TASK = c00000017e100000[1] 'swapper/0' THREAD: c00000017e108000 CPU: 2 GPR00: 0000000000000000 c00000017e10b720 c0000000009928d8 c00000017e578e00 GPR04: 0000000000000000 000000000000000c 0000000000000001 c00000017e10bb40 GPR08: 0000000000000000 8000080080040000 0000000000000000 0000000000000016 GPR12: 0000000088adbe22 c00000000fffa800 c000000000001ba0 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000000 c0000000008a5b70 GPR24: c0000000008af938 c0000000009a28d8 c0000000009bb5dc c00000017e10bb40 GPR28: c00000017e32a400 c00000017e10bc00 c00000017e32a400 c00000017e578e00 NIP [c00000000002ea58] .fsl_pcie_check_link+0x88/0xf0 LR [c00000000002eaf4] .fsl_indirect_read_config+0x34/0xb0 Call Trace: [c00000017e10b720] [c00000017e10b7a0] 0xc00000017e10b7a0 (unreliable) [c00000017e10ba30] [c00000000002eaf4] .fsl_indirect_read_config+0x34/0xb0 [c00000017e10bad0] [c00000000033aa08] .pci_bus_read_config_byte+0x88/0xd0 [c00000017e10bb90] [c00000000088d708] .pci_apply_final_quirks+0x9c/0x18c [c00000017e10bc40] [c0000000000013dc] .do_one_initcall+0x5c/0x1f0 [c00000017e10bcf0] [c00000000086ebac] .kernel_init_freeable+0x180/0x26c [c00000017e10bdb0] [c000000000001bbc] .kernel_init+0x1c/0x460 [c00000017e10be30] [c000000000000880] .ret_from_kernel_thread+0x64/0xe4 Instruction dump: 38210310 2b800015 4fdde842 7c600026 5463fffe e8010010 7c0803a6 4e800020 60000000 60000000 e92301d0 7c0004ac <80690f14> 0c030000 4c00012c 38210310 ---[ end trace 7a8fe0cbccb7d992 ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b Signed-off-by: Kevin Hao <haokexin@gmail.com> Acked-by: Roy Zang <tie-fei.zang@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2013-04-29powerpc/dts: Fix the dts for p1025rdb 36bitZhicheng Fan
Fix the following errors: Error: p1025rdb.dtsi:326.2-3 label or path, 'qe', not found Error: p1021si-post.dtsi:242.2-3 label or path, 'qe', not found FATAL ERROR: Syntax error parsing input tree Signed-off-by: Zhicheng Fan <B32736@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2013-04-29Merge tag 'usb-3.10-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB patches from Greg Kroah-Hartman: "Here's the big USB pull request for 3.10-rc1. Lots of USB patches here, the majority being USB gadget changes and USB-serial driver cleanups, the rest being ARM build fixes / cleanups, and individual driver updates. We also finally got some chipidea fixes, which have been delayed for a number of kernel releases, as the maintainer has now reappeared. All of these have been in linux-next for a while" * tag 'usb-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (568 commits) USB: ehci-msm: USB_MSM_OTG needs USB_PHY USB: OHCI: avoid conflicting platform drivers USB: OMAP: ISP1301 needs USB_PHY USB: lpc32xx: ISP1301 needs USB_PHY USB: ftdi_sio: enable two UART ports on ST Microconnect Lite usb: phy: tegra: don't call into tegra-ehci directly usb: phy: phy core cannot yet be a module USB: Fix initconst in ehci driver usb-storage: CY7C68300A chips do not support Cypress ATACB USB: serial: option: Added support Olivetti Olicard 145 USB: ftdi_sio: correct ST Micro Connect Lite PIDs ARM: mxs_defconfig: add CONFIG_USB_PHY ARM: imx_v6_v7_defconfig: add CONFIG_USB_PHY usb: phy: remove exported function from __init section usb: gadget: zero: put function instances on unbind usb: gadget: f_sourcesink.c: correct a copy-paste misnomer usb: gadget: cdc2: fix error return code in cdc_do_config() usb: gadget: multi: fix error return code in rndis_do_config() usb: gadget: f_obex: fix error return code in obex_bind() USB: storage: convert to use module_usb_driver() ...
2013-04-28Merge branch 'pm-cpufreq'Rafael J. Wysocki
* pm-cpufreq: (57 commits) cpufreq: MAINTAINERS: Add co-maintainer cpufreq: pxa2xx: initialize variables ARM: S5pv210: compiling issue, ARM_S5PV210_CPUFREQ needs CONFIG_CPU_FREQ_TABLE=y cpufreq: cpu0: Put cpu parent node after using it cpufreq: ARM big LITTLE: Adapt to latest cpufreq updates cpufreq: ARM big LITTLE: put DT nodes after using them cpufreq: Don't call __cpufreq_governor() for drivers without target() cpufreq: exynos5440: Protect OPP search calls with RCU lock cpufreq: dbx500: Round to closest available freq cpufreq: Call __cpufreq_governor() with correct policy->cpus mask cpufreq / intel_pstate: Optimize intel_pstate_set_policy cpufreq: OMAP: instantiate omap-cpufreq as a platform_driver arm: exynos: Enable OPP library support for exynos5440 cpufreq: exynos: Remove error return even if no soc is found cpufreq: exynos: Add cpufreq driver for exynos5440 cpufreq: AMD "frequency sensitivity feedback" powersave bias for ondemand governor cpufreq: ondemand: allow custom powersave_bias_target handler to be registered cpufreq: convert cpufreq_driver to using RCU cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq cpufreq: sparc: move cpufreq driver to drivers/cpufreq ... Conflicts: MAINTAINERS (with commit a8e39c3 from pm-cpuidle) drivers/cpufreq/cpufreq_governor.h (with commit beb0ff3)
2013-04-28Merge branch 'pm-cpuidle'Rafael J. Wysocki
* pm-cpuidle: (51 commits) cpuidle: add maintainer entry ARM: s3c64xx: cpuidle: use init/exit common routine SH: cpuidle: use init/exit common routine cpuidle: fix comment format ARM: imx: cpuidle: use init/exit common routine ARM: davinci: cpuidle: use init/exit common routine ARM: kirkwood: cpuidle: use init/exit common routine ARM: calxeda: cpuidle: use init/exit common routine ARM: tegra: cpuidle: use init/exit common routine for tegra3 ARM: tegra: cpuidle: use init/exit common routine for tegra2 ARM: OMAP4: cpuidle: use init/exit common routine ARM: shmobile: cpuidle: use init/exit common routine ARM: tegra: cpuidle: use init/exit common routine ARM: OMAP3: cpuidle: use init/exit common routine ARM: at91: cpuidle: use init/exit common routine ARM: ux500: cpuidle: use init/exit common routine cpuidle: make a single register function for all ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu cpuidle: remove en_core_tk_irqen flag ARM: OMAP3: remove cpuidle_wrap_enter ...
2013-04-26KVM: PPC: Book3S: Facilities to save/restore XICS presentation ctrler statePaul Mackerras
This adds the ability for userspace to save and restore the state of the XICS interrupt presentation controllers (ICPs) via the KVM_GET/SET_ONE_REG interface. Since there is one ICP per vcpu, we simply define a new 64-bit register in the ONE_REG space for the ICP state. The state includes the CPU priority setting, the pending IPI priority, and the priority and source number of any pending external interrupt. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S: Add support for ibm,int-on/off RTAS callsPaul Mackerras
This adds support for the ibm,int-on and ibm,int-off RTAS calls to the in-kernel XICS emulation and corrects the handling of the saved priority by the ibm,set-xive RTAS call. With this, ibm,int-off sets the specified interrupt's priority in its saved_priority field and sets the priority to 0xff (the least favoured value). ibm,int-on restores the saved_priority to the priority field, and ibm,set-xive sets both the priority and the saved_priority to the specified priority value. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S HV: Improve real-mode handling of external interruptsPaul Mackerras
This streamlines our handling of external interrupts that come in while we're in the guest. First, when waking up a hardware thread that was napping, we split off the "napping due to H_CEDE" case earlier, and use the code that handles an external interrupt (0x500) in the guest to handle that too. Secondly, the code that handles those external interrupts now checks if any other thread is exiting to the host before bouncing an external interrupt to the guest, and also checks that there is actually an external interrupt pending for the guest before setting the LPCR MER bit (mediated external request). This also makes sure that we clear the "ceded" flag when we handle a wakeup from cede in real mode, and fixes a potential infinite loop in kvmppc_run_vcpu() which can occur if we ever end up with the ceded flag set but MSR[EE] off. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S HV: Add support for real mode ICP in XICS emulationBenjamin Herrenschmidt
This adds an implementation of the XICS hypercalls in real mode for HV KVM, which allows us to avoid exiting the guest MMU context on all threads for a variety of operations such as fetching a pending interrupt, EOI of messages, IPIs, etc. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S HV: Speed up wakeups of CPUs on HV KVMBenjamin Herrenschmidt
Currently, we wake up a CPU by sending a host IPI with smp_send_reschedule() to thread 0 of that core, which will take all threads out of the guest, and cause them to re-evaluate their interrupt status on the way back in. This adds a mechanism to differentiate real host IPIs from IPIs sent by KVM for guest threads to poke each other, in order to target the guest threads precisely when possible and avoid that global switch of the core to host state. We then use this new facility in the in-kernel XICS code. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S: Add kernel emulation for the XICS interrupt controllerBenjamin Herrenschmidt
This adds in-kernel emulation of the XICS (eXternal Interrupt Controller Specification) interrupt controller specified by PAPR, for both HV and PR KVM guests. The XICS emulation supports up to 1048560 interrupt sources. Interrupt source numbers below 16 are reserved; 0 is used to mean no interrupt and 2 is used for IPIs. Internally these are represented in blocks of 1024, called ICS (interrupt controller source) entities, but that is not visible to userspace. Each vcpu gets one ICP (interrupt controller presentation) entity, used to store the per-vcpu state such as vcpu priority, pending interrupt state, IPI request, etc. This does not include any API or any way to connect vcpus to their ICP state; that will be added in later patches. This is based on an initial implementation by Michael Ellerman <michael@ellerman.id.au> reworked by Benjamin Herrenschmidt and Paul Mackerras. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org> [agraf: fix typo, add dependency on !KVM_MPIC] Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S: Add infrastructure to implement kernel-side RTAS callsMichael Ellerman
For pseries machine emulation, in order to move the interrupt controller code to the kernel, we need to intercept some RTAS calls in the kernel itself. This adds an infrastructure to allow in-kernel handlers to be registered for RTAS services by name. A new ioctl, KVM_PPC_RTAS_DEFINE_TOKEN, then allows userspace to associate token values with those service names. Then, when the guest requests an RTAS service with one of those token values, it will be handled by the relevant in-kernel handler rather than being passed up to userspace as at present. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org> [agraf: fix warning] Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26kvm/ppc/mpic: Eliminate mmio_mappedScott Wood
We no longer need to keep track of this now that MPIC destruction always happens either during VM destruction (after MMIO has been destroyed) or during a failed creation (before the fd has been exposed to userspace, and thus before the MMIO region could have been registered). Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26kvm: destroy emulated devices on VM exitScott Wood
The hassle of getting refcounting right was greater than the hassle of keeping a list of devices to destroy on VM exit. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: MPIC: Restrict to e500 platformsAlexander Graf
The code as is doesn't make any sense on non-e500 platforms. Restrict it there, so that people don't get wrong ideas on what would actually work. This patch should get reverted as soon as it's possible to either run e500 guests on non-e500 hosts or the MPIC emulation gains support for non-e500 modes. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: MPIC: Add support for KVM_IRQ_LINEAlexander Graf
Now that all pieces are in place for reusing generic irq infrastructure, we can copy x86's implementation of KVM_IRQ_LINE irq injection and simply reuse it for PPC, as it will work there just as well. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Support irq routing and irqfd for in-kernel MPICAlexander Graf
Now that all the irq routing and irqfd pieces are generic, we can expose real irqchip support to all of KVM's internal helpers. This allows us to use irqfd with the in-kernel MPIC. Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26kvm/ppc/mpic: add KVM_CAP_IRQ_MPICScott Wood
Enabling this capability connects the vcpu to the designated in-kernel MPIC. Using explicit connections between vcpus and irqchips allows for flexibility, but the main benefit at the moment is that it simplifies the code -- KVM doesn't need vm-global state to remember which MPIC object is associated with this vm, and it doesn't need to care about ordering between irqchip creation and vcpu creation. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: add stub functions for kvmppc_mpic_{dis,}connect_vcpu] Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26kvm/ppc/mpic: in-kernel MPIC emulationScott Wood
Hook the MPIC code up to the KVM interfaces, add locking, etc. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: add stub function for kvmppc_mpic_set_epr, non-booke, 64bit] Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26kvm/ppc/mpic: adapt to kernel style and environmentScott Wood
Remove braces that Linux style doesn't permit, remove space after '*' that Lindent added, keep error/debug strings contiguous, etc. Substitute type names, debug prints, etc. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26kvm/ppc/mpic: remove some obviously unneeded codeScott Wood
Remove some parts of the code that are obviously QEMU or Raven specific before fixing style issues, to reduce the style issues that need to be fixed. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26kvm/ppc/mpic: import hw/openpic.c from QEMUScott Wood
This is QEMU's hw/openpic.c from commit abd8d4a4d6dfea7ddea72f095f993e1de941614e ("Update version for 1.4.0-rc0"), run through Lindent with no other changes to ease merging future changes between Linux and QEMU. Remaining style issues (including those introduced by Lindent) will be fixed in a later patch. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S HV: Report VPA and DTL modifications in dirty mapPaul Mackerras
At present, the KVM_GET_DIRTY_LOG ioctl doesn't report modifications done by the host to the virtual processor areas (VPAs) and dispatch trace logs (DTLs) registered by the guest. This is because those modifications are done either in real mode or in the host kernel context, and in neither case does the access go through the guest's HPT, and thus no change (C) bit gets set in the guest's HPT. However, the changes done by the host do need to be tracked so that the modified pages get transferred when doing live migration. In order to track these modifications, this adds a dirty flag to the struct representing the VPA/DTL areas, and arranges to set the flag when the VPA/DTL gets modified by the host. Then, when we are collecting the dirty log, we also check the dirty flags for the VPA and DTL for each vcpu and set the relevant bit in the dirty log if necessary. Doing this also means we now need to keep track of the guest physical address of the VPA/DTL areas. So as not to lose track of modifications to a VPA/DTL area when it gets unregistered, or when a new area gets registered in its place, we need to transfer the dirty state to the rmap chain. This adds code to kvmppc_unpin_guest_page() to do that if the area was dirty. To simplify that code, we now require that all VPA, DTL and SLB shadow buffer areas fit within a single host page. Guests already comply with this requirement because pHyp requires that these areas not cross a 4k boundary. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: Book3S HV: Make HPT reading code notice R/C bit changesPaul Mackerras
At present, the code that determines whether a HPT entry has changed, and thus needs to be sent to userspace when it is copying the HPT, doesn't consider a hardware update to the reference and change bits (R and C) in the HPT entries to constitute a change that needs to be sent to userspace. This adds code to check for changes in R and C when we are scanning the HPT to find changed entries, and adds code to set the changed flag for the HPTE when we update the R and C bits in the guest view of the HPTE. Since we now need to set the HPTE changed flag in book3s_64_mmu_hv.c as well as book3s_hv_rm_mmu.c, we move the note_hpte_modification() function into kvm_book3s_64.h. Current Linux guest kernels don't use the hardware updates of R and C in the HPT, so this change won't affect them. Linux (or other) kernels might in future want to use the R and C bits and have them correctly transferred across when a guest is migrated, so it is better to correct this deficiency. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: e500: Add e6500 core to Kconfig descriptionMihai Caraman
Add e6500 core to Kconfig description. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-26KVM: PPC: e500mc: Enable e6500 coresMihai Caraman
Extend processor compatibility names to e6500 cores. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>