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2017-03-31powerpc/mm/hash: Pull hash constants into hash__alloc_context_id()Michael Ellerman1-7/+6
The min and max context id values used in alloc_context_id() are currently the right values for use on hash, and happen to also be safe for use on radix. But we need to change that in a subsequent patch, so make the min/max ids parameters and pull the hash values into hsah__alloc_context_id(). Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/hash: Abstract context id allocation for KVMMichael Ellerman3-4/+10
KVM wants to be able to allocate an MMU context id, which it does currently by calling __init_new_context(). We're about to rework that code, so provide a wrapper for KVM so it can not worry about the details. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/slice: Update slice mask printing to use bitmap printing.Aneesh Kumar K.V1-23/+7
We now get output like below which is much better. [ 0.935306] good_mask low_slice: 0-15 [ 0.935360] good_mask high_slice: 0-511 Compared to [ 0.953414] good_mask:1111111111111111 - 1111111111111......... I also fixed an error with slice_dbg printing. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/slice: Move slice_mask struct definition to slice.cAneesh Kumar K.V2-12/+9
This structure definition need not be in a header since this is used only by slice.c file. So move it to slice.c. This also allow us to use SLICE_NUM_HIGH instead of 64. I also switch the low_slices type to u64 from u16. This doesn't have an impact on size of struct due to padding added with u16 type. This helps in using bitmap printing function for printing slice mask. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Remove checks that TASK_SIZE_USER64 is too smallAneesh Kumar K.V1-4/+0
Remove the checks that TASK_SIZE_USER64 is smaller than H_PGTABLE_RANGE and USER_VSID_RANGE. In a following patch we will deliberately add support for a TASK_SIZE smaller than both ranges, so this will no longer be an error condition. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> [mpe: Keep the check in pgtable_64.c that we don't exceed USER_VSID_RANGE] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Move copy_mm_to_paca to paca.cAneesh Kumar K.V5-21/+24
We also update the function arg to struct mm_struct. Move this so that function finds the definition of struct mm_struct. No functional change in this patch. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/slice: Update the function prototypeAneesh Kumar K.V1-34/+28
This avoid copying the slice_mask struct as function return value Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/slice: Convert slice_mask high slice to a bitmapAneesh Kumar K.V2-46/+81
In followup patch we want to increase the va range which will result in us requiring high_slices to have more than 64 bits. To enable this convert high_slices to bitmap. We keep the number bits same in this patch and later change that to higher value Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> [mpe: Fold in fix to use bitmap_empty()] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Move hash specific pte bits to be top bits of RPNAneesh Kumar K.V3-15/+31
We don't support the full 57 bits of physical address and hence can overload the top bits of RPN as hash specific pte bits. Add a BUILD_BUG_ON() to enforce the relationship between H_PAGE_F_SECOND and H_PAGE_F_GIX. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: Paul Mackerras <paulus@ozlabs.org> [mpe: Move the BUILD_BUG_ON() into hash_utils_64.c and comment it] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Lower the max real address to 53 bitsAneesh Kumar K.V1-3/+28
Max value supported by hardware is 51 bits address. Radix page table define a slot of 57 bits for future expansion. We restrict the value supported in linux kernel 53 bits, so that we can use the bits between 57-53 for storing hash linux page table bits. This is done in the next patch. This will free up the software page table bits to be used for features that are needed for both hash and radix. The current hash linux page table format doesn't have any free software bits. Moving hash linux page table specific bits to top of RPN field free up the software bits for other purpose. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Define all PTE bits based on radix definitions.Aneesh Kumar K.V2-2/+4
Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Define _PAGE_SOFT_DIRTY unconditionallyAneesh Kumar K.V1-4/+0
Conditional PTE bit definition is confusing and results in coding error. Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/hugetlb: Filter out hugepage size not supported by page table layoutAneesh Kumar K.V1-0/+18
Without this if firmware reports 1MB page size support we will crash trying to use 1MB as hugetlb page size. echo 300 > /sys/kernel/mm/hugepages/hugepages-1024kB/nr_hugepages kernel BUG at ./arch/powerpc/include/asm/hugetlb.h:19! ..... .... [c0000000e2c27b30] c00000000029dae8 .hugetlb_fault+0x638/0xda0 [c0000000e2c27c30] c00000000026fb64 .handle_mm_fault+0x844/0x1d70 [c0000000e2c27d70] c00000000004805c .do_page_fault+0x3dc/0x7c0 [c0000000e2c27e30] c00000000000ac98 handle_page_fault+0x10/0x30 With fix, we don't enable 1MB as hugepage size. bash-4.2# cd /sys/kernel/mm/hugepages/ bash-4.2# ls hugepages-16384kB hugepages-16777216kB Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Add translation mode information in /proc/cpuinfoAneesh Kumar K.V2-0/+8
With this we have on powernv and pseries /proc/cpuinfo reporting timebase : 512000000 platform : PowerNV model : 8247-22L machine : PowerNV 8247-22L firmware : OPAL MMU : Hash Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/radix: rename _PAGE_LARGE to R_PAGE_LARGEAneesh Kumar K.V3-4/+4
This bit is only used by radix and it is nice to follow the naming style of having bit name start with H_/R_ depending on which translation mode they are used. No functional change in this patch. Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm: Cleanup bits definition between hash and radix.Aneesh Kumar K.V4-12/+17
Define everything based on bits present in pgtable.h. This will help in easily identifying overlapping bits between hash/radix. No functional change with this patch. Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/slice: Fix off-by-1 error when computing slice maskAneesh Kumar K.V1-3/+2
For low slice, max addr should be less than 4G. Without limiting this correctly we will end up with a low slice mask which has 17th bit set. This is not a problem with the current code because our low slice mask is of type u16. But in later patch I am switching low slice mask to u64 type and having the 17bit set result in wrong slice mask which in turn results in mmap failures. Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/mm/nohash: MM_SLICE is only used by book3s 64Aneesh Kumar K.V5-23/+1
BOOKE code is dead code as per the Kconfig details. So make it simpler by enabling MM_SLICE only for book3s_64. The changes w.r.t nohash is just removing deadcode. W.r.t ppc64, 4k without hugetlb will now enable MM_SLICE. But that is good, because we reduce one extra variant which probably is not getting tested much. Reviewed-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/4xx: Make sam440ep_setup_rtc() initYang Shi1-1/+1
sam440ep_setup_rtc() is just called by machine_device_initcall() so make it __init. Signed-off-by: Yang Shi <yang.shi@windriver.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/fadump: Update fadump documentationHari Bathini1-17/+17
With the unnecessary restriction to reserve memory for fadump at the top of RAM forgone, update the documentation accordingly. Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/fadump: Reserve memory at an offset closer to bottom of RAMHari Bathini1-7/+26
Currently, the area to preserve boot memory is reserved at the top of RAM. This leaves fadump vulnerable to memory hot-remove operations. As memory for fadump has to be reserved early in the boot process, fadump can't be registered after a memory hot-remove operation. Though this problem can't be eleminated completely, the impact can be minimized by reserving memory at an offset closer to bottom of the RAM. The offset for fadump memory reservation can be any value greater than fadump boot memory size. Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-31powerpc/powernv: Handle OPAL_WRONG_STATE in opal_get_sensor_data()Vipin K Parashar1-0/+4
OPAL returns OPAL_WRONG_STATE upon failing to provide sensor data due to core sleeping/offline. Add a check in opal_get_sensor_data() for sensor read failure with OPAL_WRONG_STATE return code and return -EIO. Signed-off-by: Vipin K Parashar <vipin@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc: Make /proc/self/stack always print the current stackThadeu Lima de Souza Cascardo1-1/+8
For the current task, the kernel stack would only tell the last time the process was rescheduled, if ever. Use the current stack pointer for the current task. Otherwise, every once in a while, the stacktrace printed when reading /proc/self/stack would look like the process is running in userspace, while it's not, which some may consider as a bug. This is also consistent with some other architectures, like x86 and arm, at least. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/64: Don't use early_cpu_has_feature() in cpu_ready_for_interrupts()Michael Ellerman1-2/+2
cpu_ready_for_interrupts() is called after feature patching, so there's no need to use early_cpu_has_feature(). Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/configs: Re-enable POWER8 crc32cAnton Blanchard3-3/+3
The config option for the POWER8 crc32c recently changed from CONFIG_CRYPT_CRC32C_VPMSUM to CONFIG_CRYPTO_CRC32C_VPMSUM. Update the configs. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/configs: Make oprofile a moduleAnton Blanchard3-3/+3
Most people use perf these days, so save about 31kB by making oprofile a module. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/configs: Re-enable ISO9660_FS as a built-in in 64 bit configsAnton Blanchard3-3/+3
It turns out cloud-config uses ISO9660 filesystems to inject configuration data into cloud images. The cloud-config failures when ISO9660_FS is not enabled are cryptic, and building it in makes mainline testing easier, so re-enable it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/powernv: Fix XSCOM address mangling for form 1 indirectMichael Neuling1-10/+17
POWER9 adds form 1 scoms. The form of the indirection is specified in the top nibble of the scom address. Currently we do some (ugly) bit mangling so that we can fit a 64 bit scom address into the debugfs interface. The current code only shifts the top bit (indirect bit). This patch changes it to shift the whole top nibble so that the form of the indirection is also shifted. This patch is backwards compatible with older scoms. (This change isn't required in the arch/powerpc/platforms/powernv/opal-prd.c scom interface as it passes the whole 64bit scom address without any bit mangling) Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/powernv: de-deuplicate OPAL call wrappersOliver O'Halloran1-31/+22
Currently the code to perform an OPAL call is duplicated between the normal path and path taken when tracepoints are enabled. There's no real need for this and combining them makes opal_tracepoint_entry considerably easier to understand. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/xmon: add debugfs entry for xmonGuilherme G. Piccoli1-0/+31
Currently the xmon debugger is set only via kernel boot command-line. It's disabled by default, and can be enabled with "xmon=on" on the command-line. Also, xmon may be accessed via sysrq mechanism. But we cannot enable/disable xmon in runtime, it needs kernel reload. This patch introduces a debugfs entry for xmon, allowing user to query its current state and change it if desired. Basically, the "xmon" file to read from/write to is under the debugfs mount point, on powerpc directory. It's a simple attribute, value 0 meaning xmon is disabled and value 1 the opposite. Writing these states to the file will take immediate effect in the debugger. Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/xmon: drop the nobt option from xmon plus minor fixesGuilherme G. Piccoli1-10/+3
The xmon parameter nobt was added long time ago, by commit 26c8af5f01df ("[POWERPC] print backtrace when entering xmon"). The problem that time was that during a crash in a machine with USB keyboard, xmon wouldn't respond to commands from the keyboard, so printing the backtrace wouldn't be possible. Idea then was to show automatically the backtrace on xmon crash for the first time it's invoked (if it recovers, next time xmon won't show backtrace automatically). The nobt parameter was added _only_ to prevent this automatic trace show. Seems long time ago USB keyboards didn't work that well! We don't need this parameter anymore, the feature of auto showing the backtrace is interesting (imagine a case of auto-reboot script), so this patch extends the functionality, by always showing the backtrace automatically when xmon is invoked; it removes the nobt parameter too. Also, this patch fixes __initdata placement on xmon_early and replaces __initcall() with modern device_initcall() on sysrq handler. Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-28powerpc/xmon: Fix an unexpected xmon on/off state changePan Xinhui1-7/+10
Once xmon is triggered by sysrq-x, it is enabled always afterwards even if it is disabled during boot. This will cause a system reset interrupt fail to dump. So keep xmon in its original state after exit. We have several ways to set xmon on or off. 1) by a build config CONFIG_XMON_DEFAULT. 2) by a boot cmdline with xmon or xmon=early or xmon=on to enable xmon and xmon=off to disable xmon. This value will override that in step 1. 3) by a debugfs interface, as proposed in this patchset. And this value can override those in step 1 and 2. Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/64s: POWER8 add missing machine check definitionsNicholas Piggin1-7/+19
POWER8 uses bit 36 in SRR1 like POWER9 for i-side machine checks, and contains several conditions for link timeouts that are not currently handled. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/64s: Data driven machine check handlingNicholas Piggin1-254/+74
Move the handling (corrective action) of machine checks to the table based evaluation. This changes P7 and P8 ERAT flushing from using SLB flush to using ERAT flush. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/64s: Data driven machine check evaluationNicholas Piggin1-243/+326
Have machine types define i-side and d-side tables to describe their machine check encodings, and match entries to evaluate (for reporting) machine checks. Functionality is mostly unchanged (tested with a userspace harness), but it does make a change in that it no longer records DAR as the effective address for those errors where it is specified to be invalid (which is a reporting change only). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/64s: Move POWER machine check defines into mce_power.cNicholas Piggin2-91/+92
Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/64s: Clean up machine check recovery flushingNicholas Piggin1-74/+23
Use the flush function introduced with the POWER9 machine check handler for POWER7 and 8, rather than open coding it multiple times in callers. There is a specific ERAT flush type introduced for POWER9, but the POWER7-8 ERAT errors continue to do SLB flushing (which also flushes ERAT), so as not to introduce functional changes with this cleanup patch. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/64s: Machine check print NIPNicholas Piggin1-1/+2
Print the faulting address of the machine check that may help with debugging. The effective address reported can be a target memory address rather than the faulting instruction address. Fix up a dangling bracket while here. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21drivers/pcmcia: NO_IRQ removal for electra_cf.cMichael Ellerman1-2/+2
We'd like to eventually remove NO_IRQ on powerpc, so remove usages of it from electra_cf.c which is a powerpc-only driver. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21MAINTAINERS: Add file patterns for powerpc device tree bindingsGeert Uytterhoeven1-1/+2
Submitters of device tree binding documentation may forget to CC the subsystem maintainer if this is missing. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc: Fix missing CRCs, add more asm-prototypes.h declarationsBen Hutchings1-0/+2
Add declarations for: - __mfdcr, __mtdcr (if CONFIG_PPC_DCR_NATIVE=y; through <asm/dcr.h>) - switch_mmu_context (if CONFIG_PPC_BOOK3S_64=n; through <asm/mmu_context.h>) Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/32: Remove Mac-on-Linux/rtlinux hooksBen Hutchings2-17/+1
The symbols exported for use by MOL/rtlinux aren't getting CRCs and I was about to fix that. But MOL is dead upstream, and the latest work on it was to make it use KVM instead of its own kernel module. So remove them instead. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/mm: Move mmap_sem unlocking in do_page_fault()Laurent Dufour1-15/+4
Since the fault retry is now handled earlier, we can release the mmap_sem lock earlier too and remove later unlocking previously done in mm_fault_error(). Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/mm: Handle VM_FAULT_RETRY earlierLaurent Dufour1-29/+38
In do_page_fault() if handle_mm_fault() returns VM_FAULT_RETRY, retry the page fault handling before anything else. This would simplify the handling of the mmap_sem lock in this part of the code. Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-21powerpc/mm: Move mmap_sem unlock up from do_sigbusLaurent Dufour1-3/+3
Move mmap_sem releasing in the do_sigbus()'s unique caller : mm_fault_error() No functional changes. Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-20powerpc/powernv/npu: Remove dead iommu codeAlexey Kardashevskiy1-3/+1
PNV_IODA_PE_DEV is only used for NPU devices (emulated PCI bridges representing NVLink). These are added to IOMMU groups with corresponding NVIDIA devices after all non-NPU PEs are setup; a special helper - pnv_pci_ioda_setup_iommu_api() - handles this in pnv_pci_ioda_fixup(). The pnv_pci_ioda2_setup_dma_pe() helper sets up DMA for a PE. It is called for VFs (so it does not handle NPU case) and PCI bridges but only IODA1 and IODA2 types. An NPU bridge has its own type id (PNV_PHB_NPU) so pnv_pci_ioda2_setup_dma_pe() cannot be called on NPU and therefore (pe->flags & PNV_IODA_PE_DEV) is always "false". This removes not used iommu_add_device(). This should not cause any behavioral change. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-20powerpc/powernv: Fix it_ops::get() callback to return in cpu endianAlexey Kardashevskiy1-1/+1
The iommu_table_ops callbacks are declared CPU endian as they take and return "unsigned long"; underlying hardware tables are big-endian. However get() was missing be64_to_cpu(), this adds the missing conversion. The only caller of this is crash dump at arch/powerpc/kernel/iommu.c, iommu_table_clear() which only compares TCE to zero so this change should not cause behavioral change. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-20powerpc/ftrace: Add prototype for prepare_ftrace_return()Tobin C. Harding2-0/+3
Sparse emits a warning: symbol 'prepare_ftrace_return' was not declared. Should it be static? prepare_ftrace_return() is called from assembler and should not be static. Add a prototype for it to asm-prototypes.h and include that in ftrace.c. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-20powerpc/swsusp: Include suspend.h to silence sparse warningsTobin C. Harding1-0/+1
Sparse emits two symbol not declared warnings for swsusp.c. The two functions, save_processor_state() and restore_processor_state() are declared already in suspend.h, so include it. Signed-off-by: Tobin C. Harding <me@tobin.cc> Reviewed-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-20powerpc/pseries: Move struct hcall_stats to hvCall_inst.cTobin C. Harding2-10/+10
struct hcall_stats is only used in hvCall_inst.c, so move it there. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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