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2018-03-13powerpc/mm/slice: Switch to 3-operand slice bitops helpersNicholas Piggin1-15/+23
This converts the slice_mask bit operation helpers to be the usual 3-operand kind, which allows 2 inputs to set a different output without an extra copy, which is used in the next patch. Adds slice_copy_mask, which will be used in the next patch. Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/mm/slice: implement slice_check_range_fitsNicholas Piggin1-28/+34
Rather than build slice masks from a range then use that to check for fit in a candidate mask, implement slice_check_range_fits that checks if a range fits in a mask directly. This allows several structures to be removed from stacks, and also we don't expect a huge range in a lot of these cases, so building and comparing a full mask is going to be more expensive than testing just one or two bits of the range. On POWER8, this increases vfork+exec+exit performance by 0.3% and reduces time to mmap+munmap a 64kB page by 5%. Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/mm/slice: implement a slice mask cacheNicholas Piggin3-42/+98
Calculating the slice mask can become a signifcant overhead for get_unmapped_area. This patch adds a struct slice_mask for each page size in the mm_context, and keeps these in synch with the slices psize arrays and slb_addr_limit. On Book3S/64 this adds 288 bytes to the mm_context_t for the slice mask caches. On POWER8, this increases vfork+exec+exit performance by 9.9% and reduces time to mmap+munmap a 64kB page by 28%. Reduces time to mmap+munmap by about 10% on 8xx. Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/mm/slice: pass pointers to struct slice_mask where possibleNicholas Piggin1-39/+45
Pass around const pointers to struct slice_mask where possible, rather than copies of slice_mask, to reduce stack and call overhead. checkstack.pl gives, before: 0x00000d1c slice_get_unmapped_area [slice.o]: 592 0x00001864 is_hugepage_only_range [slice.o]: 448 0x00000754 slice_find_area_topdown [slice.o]: 400 0x00000484 slice_find_area_bottomup.isra.1 [slice.o]: 272 0x000017b4 slice_set_range_psize [slice.o]: 224 0x00000a4c slice_find_area [slice.o]: 128 0x00000160 slice_check_fit [slice.o]: 112 after: 0x00000ad0 slice_get_unmapped_area [slice.o]: 448 0x00001464 is_hugepage_only_range [slice.o]: 288 0x000006c0 slice_find_area [slice.o]: 144 0x0000016c slice_check_fit [slice.o]: 128 0x00000528 slice_find_area_bottomup.isra.2 [slice.o]: 128 0x000013e4 slice_set_range_psize [slice.o]: 128 This increases vfork+exec+exit performance by 1.5%. Reduces time to mmap+munmap a 64kB page by 17%. Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/mm/slice: tidy lpsizes and hpsizes update loopsNicholas Piggin1-10/+12
Make these loops look the same, and change their form so the important part is not wrapped over so many lines. Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/mm/slice: Simplify and optimise slice context initialisationNicholas Piggin4-71/+23
The slice state of an mm gets zeroed then initialised upon exec. This is the only caller of slice_set_user_psize now, so that can be removed and instead implement a faster and simplified approach that requires no locking or checking existing state. This speeds up vfork+exec+exit performance on POWER8 by 3%. Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/xmon: Move empty plpar_set_ciabr() into plpar_wrappers.hMichael Ellerman2-6/+7
Now that plpar_wrappers.h has an #ifdef PSERIES we can move the empty version of plpar_set_ciabr() which xmon wants into there. Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Rename plapr routines to plparMichael Ellerman4-7/+7
Back in 2013 we added some hypercall wrappers which misspelled "plpar" (P-series Logical PARtition) as "plapr". Visually they're hard to distinguish and it almost doesn't matter, but it is confusing when grepping to miss some calls because of the typo. They've also started spreading, so before they take over let's fix them all to be "plpar". Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/pseries: Make plpar_wrappers.h safe to include when PSERIES=nMichael Ellerman1-0/+4
Currently plpar_wrappers.h is not safe to include when CONFIG_PPC_PSERIES=n, or at least it can be depending on other config options and so on. Fix that by wrapping the entire content in an ifdef. Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/pseries: Move smp_query_cpu_stopped() etc. out of plpar_wrappers.hMichael Ellerman2-8/+8
smp_query_cpu_stopped() and related #defines are currently in plpar_wrappers.h. The function actually does an RTAS call, not an hcall, and basically has nothing to do with plpar_wrappers.h Move it into pseries.h, where it can easily be used by the only two callers in pseries/smp.c and pseries/hotplug-cpu.c. Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/32: Add missing prototypes for (early|machine)_init()Mathieu Malaterre2-0/+4
early_init() and machine_init() have no prototype, add one in asm-prototypes.h. Fixes the following warnings (treated as error in W=1): arch/powerpc/kernel/setup_32.c:68:30: error: no previous prototype for ‘early_init’ arch/powerpc/kernel/setup_32.c:99:21: error: no previous prototype for ‘machine_init’ Signed-off-by: Mathieu Malaterre <[email protected]> [mpe: Move them to asm-prototypes.h, drop other functions] Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/32: Make some functions staticMathieu Malaterre2-5/+4
These functions can all be static, make it so. Signed-off-by: Mathieu Malaterre <[email protected]> [mpe: Combine a patch of Mathieu's with some other static conversions] Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Avoid comparison of unsigned long >= 0 in __access_ok()Mathieu Malaterre1-3/+7
Rewrite function-like macro into regular static inline function to avoid a warning during macro expansion. Fix warning (treated as error in W=1): ./arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true (((size) == 0) || (((size) - 1) <= ((segment).seg - (addr))))) ^ Suggested-by: Segher Boessenkool <[email protected]> Signed-off-by: Mathieu Malaterre <[email protected]> Reviewed-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Avoid comparison of unsigned long >= 0 in pfn_valid()Mathieu Malaterre1-1/+9
Rewrite comparison since all values compared are of type `unsigned long`. Instead of using unsigned properties and rewriting the original code as: (originally suggested by Segher Boessenkool <[email protected]>) #define pfn_valid(pfn) \ (((pfn) - ARCH_PFN_OFFSET) < (max_mapnr - ARCH_PFN_OFFSET)) Prefer a static inline function to make code as readable as possible. Fix a warning (treated as error in W=1): arch/powerpc/include/asm/page.h:129:32: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits] #define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr) ^ Suggested-by: Christophe Leroy <[email protected]> Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/prom: Remove warning on array size when emptyMathieu Malaterre1-2/+2
When neither CONFIG_ALTIVEC, nor CONFIG_VSX or CONFIG_PPC64 is defined, the array feature_properties is defined as an empty array, which in turn triggers the following warning (treated as error on W=1): arch/powerpc/kernel/prom.c: In function ‘check_cpu_feature_properties’: arch/powerpc/kernel/prom.c:298:16: error: comparison of unsigned expression < 0 is always false for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) { ^ Suggested-by: Michael Ellerman <[email protected]> Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototypes for ppc_select() & ppc_fadvise64_64()Mathieu Malaterre1-0/+4
Add missing prototypes for ppc_select() & ppc_fadvise64_64() to header asm-prototypes.h. Fix the following warnings (treated as errors in W=1) arch/powerpc/kernel/syscalls.c:87:1: error: no previous prototype for ‘ppc_select’ arch/powerpc/kernel/syscalls.c:119:6: error: no previous prototype for ‘ppc_fadvise64_64’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototypes for hw_breakpoint_handler() & ↵Mathieu Malaterre1-0/+2
arch_unregister_hw_breakpoint() In commit 5aae8a537080 ("powerpc, hw_breakpoints: Implement hw_breakpoints for 64-bit server processors") function hw_breakpoint_handler() and arch_unregister_hw_breakpoint() were added without function prototypes in hw_breakpoint.h header. Fix the following warning(s) (treated as error in W=1): arch/powerpc/kernel/hw_breakpoint.c:106:6: error: no previous prototype for ‘arch_unregister_hw_breakpoint’ arch/powerpc/kernel/hw_breakpoint.c:209:5: error: no previous prototype for ‘hw_breakpoint_handler’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototypes for sys_sigreturn() & sys_rt_sigreturn()Mathieu Malaterre1-0/+5
Two functions did not have a prototype defined in signal.h header. Fix the following two warnings (treated as errors in W=1): arch/powerpc/kernel/signal_32.c:1135:6: error: no previous prototype for ‘sys_rt_sigreturn’ arch/powerpc/kernel/signal_32.c:1422:6: error: no previous prototype for ‘sys_sigreturn’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototype for sys_debug_setcontext()Mathieu Malaterre1-0/+4
In commit 81e7009ea46c ("powerpc: merge ppc signal.c and ppc64 signal32.c") the function sys_debug_setcontext was added without a prototype. Fix compilation warning (treated as error in W=1): arch/powerpc/kernel/signal_32.c:1227:5: error: no previous prototype for ‘sys_debug_setcontext’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototype for init_IRQ()Mathieu Malaterre1-0/+1
A function init_IRQ() was added without a prototype declared in header irq.h. Fix the following warning (treated as error in W=1): arch/powerpc/kernel/irq.c:662:13: error: no previous prototype for ‘init_IRQ’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototype for arch_irq_work_raise()Mathieu Malaterre1-0/+1
In commit 4f8b50bbbe63 ("irq_work, ppc: Fix up arch hooks") a new function arch_irq_work_raise() was added without a prototype in header irq_work.h. Fix the following warning (treated as error in W=1): arch/powerpc/kernel/time.c:523:6: error: no previous prototype for ‘arch_irq_work_raise’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototype for arch_dup_task_struct()Mathieu Malaterre1-0/+1
In commit 55ccf3fe3f9a ("fork: move the real prepare_to_copy() users to arch_dup_task_struct()") a new arch_dup_task_struct() was added without a prototype declared in thread_info.h header. Fix the following warning (treated as error in W=1): arch/powerpc/kernel/process.c:1609:5: error: no previous prototype for ‘arch_dup_task_struct’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototype for time_init()Mathieu Malaterre1-0/+1
The function time_init did not have a prototype defined in the time.h header. Fix the following warning (treated as error in W=1): arch/powerpc/kernel/time.c:1068:13: error: no previous prototype for ‘time_init’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototype for hdec_interruptMathieu Malaterre1-0/+1
In commit dabe859ec636 ("powerpc: Give hypervisor decrementer interrupts their own handler") an empty body function was added, but no prototype was declared. Fix warning (treated as error in W=1): arch/powerpc/kernel/time.c:629:6: error: no previous prototype for ‘hdec_interrupt’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc: Add missing prototype for slb_miss_bad_addr()Mathieu Malaterre1-0/+1
In commit f0f558b131db ("powerpc/mm: Preserve CFAR value on SLB miss caused by access to bogus address"), the function slb_miss_bad_addr() was added without a prototype. This commit adds it. Fix a warning (treated as error in W=1): arch/powerpc/kernel/traps.c:1498:6: error: no previous prototype for ‘slb_miss_bad_addr’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/kernel: Make function __giveup_fpu() staticMathieu Malaterre2-3/+2
__giveup_fpu() is never called outside process.c, so it can be static. That also means we don't need an empty definition in switch_to.h Signed-off-by: Mathieu Malaterre <[email protected]> [mpe: Also drop the empty version, rewrite change log] Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/embedded6xx: Make functions flipper_pic_init() & ug_udbg_putc() staticMathieu Malaterre2-2/+2
Change signature of two functions, adding static keyword to prevent the following two warnings (treated as errors on W=1): arch/powerpc/platforms/embedded6xx/flipper-pic.c:135:28: error: no previous prototype for ‘flipper_pic_init’ arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c:172:6: error: no previous prototype for ‘ug_udbg_putc’ Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/32: Mark both tmp variables as unusedMathieu Malaterre1-2/+2
Since the value of `tmp` is never intended to be read, declare both `tmp` variables as unused. Fix warning (treated as error in W=1): arch/powerpc/kernel/signal_32.c: In function ‘sys_swapcontext’: arch/powerpc/kernel/signal_32.c:1048:16: error: variable ‘tmp’ set but not used arch/powerpc/kernel/signal_32.c: In function ‘sys_debug_setcontext’: arch/powerpc/kernel/signal_32.c:1234:16: error: variable ‘tmp’ set but not used Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/32: Move the inline keyword at the beginning of function declarationMathieu Malaterre1-2/+2
The inline keyword was not at the beginning of the function declaration. Fix the following warning (treated as error in W=1): arch/powerpc/lib/sstep.c:283:1: error: ‘inline’ is not at beginning of declaration static int nokprobe_inline copy_mem_in(u8 *dest, unsigned long ea, int nb, arch/powerpc/lib/sstep.c:388:1: error: ‘inline’ is not at beginning of declaration static int nokprobe_inline copy_mem_out(u8 *dest, unsigned long ea, int nb, Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/epapr: Move register keyword at the beginning of declarationMathieu Malaterre1-11/+11
Fix warning for all register unsigned long (0,3-12) that appear during W=1 compilation: ./arch/powerpc/include/asm/epapr_hcalls.h:479:2: warning: ‘register’ is not at beginning of declaration [-Wold-style-declaration] unsigned long register r[\d] asm("r[\d]"); Signed-off-by: Mathieu Malaterre <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13PCI/hotplug: ppc: correct a php_slot usage after freeSimon Guo1-1/+1
In pnv_php_unregister_one(), pnv_php_put_slot() might kfree php_slot structure. But there is pci_hp_deregister() after that with php_slot reference. This patch moves pnv_php_put_slot() to the end of function. Signed-off-by: Simon Guo <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/powernv/mce: Don't silently restart the machineBalbir Singh1-1/+4
On MCE the current code will restart the machine with ppc_md.restart(). This case was extremely unlikely since prior to that a skiboot call is made and that resulted in a checkstop for analysis. With newer skiboots, on P9 we don't checkstop the box by default, instead we return back to the kernel to extract useful information at the time of the MCE. While we still get this information, this patch converts the restart to a panic(), so that if configured a dump can be taken and we can track and probably debug the potential issue causing the MCE. Signed-off-by: Balbir Singh <[email protected]> Reviewed-by: Nicholas Piggin <[email protected]> Reviewed-by: Stewart Smith <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13cxl: read PHB indications from the device treePhilippe Bergheaud3-7/+45
Configure the P9 XSL_DSNCTL register with PHB indications found in the device tree, or else use legacy hard-coded values. Signed-off-by: Philippe Bergheaud <[email protected]> Reviewed-by: Frederic Barrat <[email protected]> Reviewed-by: Christophe Lombard <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/powernv: Enable tunneled operationsPhilippe Bergheaud6-9/+148
P9 supports PCI tunneled operations (atomics and as_notify). This patch adds support for tunneled operations on powernv, with a new API, to be called by device drivers: pnv_pci_enable_tunnel() Enable tunnel operations, tell driver the 16-bit ASN indication used by kernel. pnv_pci_disable_tunnel() Disable tunnel operations. pnv_pci_set_tunnel_bar() Tell kernel the Tunnel BAR Response address used by driver. This function uses two new OPAL calls, as the PBCQ Tunnel BAR register is configured by skiboot. pnv_pci_get_as_notify_info() Return the ASN info of the thread to be woken up. Signed-off-by: Philippe Bergheaud <[email protected]> Reviewed-by: Frederic Barrat <[email protected]> Reviewed-by: Christophe Lombard <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/powernv/npu: Fix deadlock in mmio_invalidate()Alistair Popple1-88/+141
When sending TLB invalidates to the NPU we need to send extra flushes due to a hardware issue. The original implementation would lock the all the ATSD MMIO registers sequentially before unlocking and relocking each of them sequentially to do the extra flush. This introduced a deadlock as it is possible for one thread to hold one ATSD register whilst waiting for another register to be freed while the other thread is holding that register waiting for the one in the first thread to be freed. For example if there are two threads and two ATSD registers: Thread A Thread B ---------------------- Acquire 1 Acquire 2 Release 1 Acquire 1 Wait 1 Wait 2 Both threads will be stuck waiting to acquire a register resulting in an RCU stall warning or soft lockup. This patch solves the deadlock by refactoring the code to ensure registers are not released between flushes and to ensure all registers are either acquired or released together and in order. Fixes: bbd5ff50afff ("powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD") Signed-off-by: Alistair Popple <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/8xx: fix cpm_cascade() dual end of interruptChristophe Leroy1-7/+1
cpm_cascade() doesn't have to call eoi() as it is already called by handle_fasteoi_irq() And cpm_get_irq() will always return an unsigned int so the test is useless Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/mm: Drop the function native_register_proc_table()Anshuman Khandual1-15/+0
This is left over from the segment table implementation and not getting called from any where now. Hence just drop it. Suggested-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Anshuman Khandual <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13cxl: Check if PSL data-cache is available before issue flush requestVaibhav Jain3-7/+27
PSL9D doesn't have a data-cache that needs to be flushed before resetting the card. However when cxl tries to flush data-cache on such a card, it times-out as PSL_Control register never indicates flush operation complete due to missing data-cache. This is usually indicated in the kernel logs with this message: "WARNING: cache flush timed out" To fix this the patch checks PSL_Debug register CDC-Field(BIT:27) which indicates the absence of a data-cache and sets a flag 'no_data_cache' in 'struct cxl_native' to indicate this. When cxl_data_cache_flush() is called it checks the flag and if set bails out early without requesting a data-cache flush operation to the PSL. Signed-off-by: Vaibhav Jain <[email protected]> Acked-by: Andrew Donnellan <[email protected]> Acked-by: Frederic Barrat <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13cxl: Remove function write_timebase_ctrl_psl9() for PSL9Vaibhav Jain1-8/+2
For PSL9 the contents of PSL_TB_CTLSTAT register have changed in PSL9 and all of the register is now readonly. Hence we don't need an sl_ops implementation for 'write_timebase_ctrl' for to populate this register for PSL9. Hence this patch removes function write_timebase_ctrl_psl9() and its references from the code. Signed-off-by: Vaibhav Jain <[email protected]> Acked-by: Andrew Donnellan <[email protected]> Acked-by: Frederic Barrat <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13cxl: Enable NORST bit in PSL_DEBUG register for PSL9Vaibhav Jain1-2/+6
We enable the NORST bit by default for debug afu images to prevent reset of AFU trace-data on a PCI link drop. For production AFU images this bit is always ignored and PSL gets reconfigured anyways thereby resetting the trace data. So setting this bit for non-debug images doesn't have any impact. Signed-off-by: Vaibhav Jain <[email protected]> Reviewed-by: Christophe Lombard <[email protected]> Acked-by: Frederic Barrat <[email protected]> Acked-by: Andrew Donnellan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/xmon: Clear all breakpoints when xmon is disabled via debugfsVaibhav Jain1-0/+24
Presently when xmon is disabled by debugfs any existing instruction/data-access breakpoints set are not disabled. This may lead to kernel oops when those breakpoints are hit as the necessary debugger hooks aren't installed. Hence this patch introduces a new function named clear_all_bpt() which is called when xmon is disabled via debugfs. The function will unpatch/clear all the trap and ciabr/dab based breakpoints. Signed-off-by: Vaibhav Jain <[email protected]> Reviewed-by: Balbir Singh <[email protected]> [mpe: Fix build break when CONFIG_DEBUG_FS=n] Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/xmon: Setup debugger hooks when first break-point is setVaibhav Jain1-1/+16
Presently sysrq key for xmon('x') is registered during kernel init irrespective of the value of kernel param 'xmon'. Thus xmon is enabled even if 'xmon=off' is passed on the kernel command line. However this doesn't enable the kernel debugger hooks needed for instruction or data breakpoints. Thus when a break-point is hit with xmon=off a kernel oops of the form below is reported: Oops: Exception in kernel mode, sig: 5 [#1] < snip > Trace/breakpoint trap To fix this the patch checks and enables debugger hooks when an instruction or data break-point is set via xmon console. Signed-off-by: Vaibhav Jain <[email protected]> Reviewed-by: Balbir Singh <[email protected]> [mpe: Just printf directly, no need for static const char[]] Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13selftests/powerpc: Skip tm-unavailable if TM is not enabledGustavo Romero1-8/+16
Some processor revisions do not support transactional memory, and additionally kernel support can be disabled. In either case the tm-unavailable test should be skipped, otherwise it will fail with a SIGILL. That commit also sets this selftest to be called through the test harness as it's done for other TM selftests. Finally, it avoids using "ping" as a thread name since it's ambiguous and can be confusing when shown, for instance, in a kernel backtrace log. Fixes: 77fad8bfb1d2 ("selftests/powerpc: Check FP/VEC on exception in TM") Signed-off-by: Gustavo Romero <[email protected]> Reviewed-by: Cyril Bur <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/via-pmu: Fix section mismatch warningMathieu Malaterre1-1/+1
Make the struct via_pmu_driver const to avoid following warning: WARNING: vmlinux.o(.data+0x4739c): Section mismatch in reference from the variable via_pmu_driver to the function .init.text:pmu_init() The variable via_pmu_driver references the function __init pmu_init() If the reference is valid then annotate the variable with __init* or __refdata (see linux/init.h) or name the variable: *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console Signed-off-by: Mathieu Malaterre <[email protected]> Suggested-by: Laurent Vivier <[email protected]> Reviewed-by: Laurent Vivier <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/powernv/vas: Fix order of cleanup in vas_window_init_dbgdir()Sukadev Bhattiprolu1-4/+4
Fix the order of cleanup to ensure we free the name buffer in case of an error creating 'hvwc' or 'info' files. Signed-off-by: Sukadev Bhattiprolu <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13powerpc/powernv/vas: Remove a stray line in MakefileSukadev Bhattiprolu1-1/+0
Remove a bogus line from arch/powerpc/platforms/powernv/Makefile that was added by commit ece4e51 ("powerpc/vas: Export HVWC to debugfs"). Signed-off-by: Sukadev Bhattiprolu <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13selftest/powerpc: Add test for sigreturn in transactionLaurent Dufour2-1/+93
Ensure that kernel is throwing away the suspended transaction when sigreturn() is called otherwise it if fails to restore the signal frame's TM SPRS. Signed-off-by: Laurent Dufour <[email protected]> Reviewed-by: Cyril Bur <[email protected]> [mpe: Add have_htm() check, minor formatting, add SPDX tag] Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13macintosh: Add module license to ans-lcdLarry Finger1-0/+1
In kernel 4.15, the modprobe step on my PowerBook G4 started complaining that there was no module license for ans-lcd. Signed-off-by: Larry Finger <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-03-13Merge two commits from 'kvm-ppc-fixes' into nextMichael Ellerman1-1/+3
This merges two commits from the `kvm-ppc-fixes` branch into next, as they fix build breaks we are seeing while testing next.
2018-03-06powerpc/pseries: Fix vector5 in ibm architecture vector tableBharata B Rao1-1/+0
With ibm,dynamic-memory-v2 and ibm,drc-info coming around the same time, byte22 in vector5 of ibm architecture vector table got set twice separately. The end result is that guest kernel isn't advertising support for ibm,dynamic-memory-v2. Fix this by removing the duplicate assignment of byte22. Fixes: 02ef6dd8109b ("powerpc: Enable support for ibm,drc-info devtree property") Signed-off-by: Bharata B Rao <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
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