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2015-08-03ARCv2: Fix the peripheral address space detectionVineet Gupta1-1/+7
With HS 2.1 release, the peripheral space register no longer contains the uncached space specifics, causing the kernel to panic early on. So read the newer NON VOLATILE AUX register to get that info. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-31arc/irq: Prepare idu_cascade_isr for irq argument removalThomas Gleixner1-1/+2
The irq argument of most interrupt flow handlers is unused or merily used instead of a local variable. The handlers which need the irq argument can retrieve the irq number from the irq descriptor. Search and update was done with coccinelle and the invaluable help of Julia Lawall. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Vineet Gupta <vgupta@synopsys.com>
2015-07-20ARC/time: Migrate to new 'set-state' interfaceViresh Kumar1-25/+15
Migrate arc driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. Cc: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-13ARCv2: support HS38 releasesVineet Gupta1-1/+5
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-09ARC: slightly refactor macros for boot loggingVineet Gupta1-4/+5
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-09arc:irqchip: prepare for drivers/irqchip/irqchip.h removalJoël Porquet3-3/+0
The IRQCHIP_DECLARE macro migrated to 'include/linux/irqchip.h'. See commit 91e20b5040c67c51aad88cf87db4305c5bd7f79d ("irqchip: Move IRQCHIP_DECLARE macro to include/linux/irqchip.h"). This patch removes the inclusions of private header 'drivers/irqchip/irqchip.h' and if necessary replaces them with inclusions of 'include/linux/irqchip.h'. Signed-off-by: Joel Porquet <joel@porquet.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-06ARCv2: intc: IDU: Fix potential race in installing a chained IRQ handlerVineet Gupta1-2/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-06ARCv2: intc: IDU: support irq affinityVineet Gupta1-1/+18
With this nsim standlone / OSCI have working irq affinity - AXS103 still needs some work as IDU is not visible in intc hierarchy yet ! Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-06ARC: fix unused var wanringVineet Gupta1-1/+0
Fixes: 9bf39ab2adaf ("vfs: add file_path() helper") Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-07-04Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds1-7/+3
Pull more vfs updates from Al Viro: "Assorted VFS fixes and related cleanups (IMO the most interesting in that part are f_path-related things and Eric's descriptor-related stuff). UFS regression fixes (it got broken last cycle). 9P fixes. fs-cache series, DAX patches, Jan's file_remove_suid() work" [ I'd say this is much more than "fixes and related cleanups". The file_table locking rule change by Eric Dumazet is a rather big and fundamental update even if the patch isn't huge. - Linus ] * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (49 commits) 9p: cope with bogus responses from server in p9_client_{read,write} p9_client_write(): avoid double p9_free_req() 9p: forgetting to cancel request on interrupted zero-copy RPC dax: bdev_direct_access() may sleep block: Add support for DAX reads/writes to block devices dax: Use copy_from_iter_nocache dax: Add block size note to documentation fs/file.c: __fget() and dup2() atomicity rules fs/file.c: don't acquire files->file_lock in fd_install() fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation vfs: avoid creation of inode number 0 in get_next_ino namei: make set_root_rcu() return void make simple_positive() public ufs: use dir_pages instead of ufs_dir_pages() pagemap.h: move dir_pages() over there remove the pointless include of lglock.h fs: cleanup slight list_entry abuse xfs: Correctly lock inode when removing suid and file capabilities fs: Call security_ops->inode_killpriv on truncate fs: Provide function telling whether file_remove_privs() will do anything ...
2015-06-28ARC: Fix build failures for ARCompact in linux-next after ARCv2 supportVineet Gupta1-7/+1
Reported-by: Guenter Roeck <private@roeck-us.net> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-25ARCv2: [vdk] dts files and defconfig for HS38 VDKRuud Derwig1-0/+2
- CONFIG_ARC_UBOOT_SUPPORT to handle arguments passed in r0, r1, r2 - CONFIG_DEVTMPFS_MOUNT for mouting rootfs since it uses external cpio for rootfs Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Ruud Derwig <rderwig@synopsys.com> [vgupta: folded the Main baord DT files for smp/up into one] Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-25ARCv2: [axs103] Support ARC SDP FPGA platform for HS38x coresVineet Gupta1-1/+1
Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-23vfs: add file_path() helperMiklos Szeredi1-7/+3
Turn d_path(&file->f_path, ...); into file_path(file, ...); Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-06-22ARCv2: SMP: intc: IDU 2nd level intc for dynamic IRQ distributionVineet Gupta1-1/+182
Cc: Jason Cooper <jason@lakedaemon.net> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: SMP: clocksource: Enable Global Real Time counterVineet Gupta2-0/+48
Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: SMP: ARConnect debug/robustnessVineet Gupta2-8/+60
- Handle possible interrupt coalescing from MCIP - chk if prev IPI ack before sending new Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: SMP: Support ARConnect (MCIP) for Inter-Core-Interrupts et alVineet Gupta3-1/+119
Cc: Jason Cooper <jason@lakedaemon.net> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARC: make plat_smp_ops weak to allow over-ridesVineet Gupta1-1/+1
This allows platforms to provide their own cpu wakeup routines as well as IPI send / clear backends, while allowing a SMP kernel w/o any such backend to build/boot Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: clocksource: Introduce 64bit local RTC counterVineet Gupta2-2/+57
Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: STAR 9000808988: signals involving Delay SlotVineet Gupta1-0/+2
Reported by Anton as LTP:munmap01 failing with Illegal Instruction Exception. --------------------->8-------------------------------------- mmap2(NULL, 24576, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0x200d2000 munmap(0x200d2000, 24576) = 0 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x200d2000} --- potentially unexpected fatal signal 4. Path: /munmap01 CPU: 0 PID: 61 Comm: munmap01 Not tainted 3.13.0-g5d5c46d9a556 #8 task: 9f1a8000 ti: 9f154000 task.ti: 9f154000 [ECR ]: 0x00020100 => Illegal Insn [EFA ]: 0x0001354c [BLINK ]: 0x200515d4 [ERET ]: 0x1354c @off 0x1354c in [/munmap01] VMA: 0x00010000 to 0x00018000 [STAT32]: 0x800802c0 ... --------------------->8-------------------------------------- The issue was 1. munmap01 accessed unmapped memory (on purpose) with signal handler installed for SIGSEGV 2. The faulting instruction happened to be in Delay Slot 00011864 <main>: 11908: bl.d 13284 <tst_resm> 1190c: stb r16,[r2] 3. kernel sets up the reg file for signal handler and correctly clears the DE bit in pt_regs->status32 placeholder 4. However RESTORE_CALLEE_SAVED_USER macro is not adjusted for ARCv2, and it over-writes the above with orig/stale value of status32 5. After RTIE, userspace signal handler executes a non branch instruction with DE bit set, triggering Illegal Instruction Exception. Reported-by: Anton Kolesov <akolesov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: STAR 9000793984: Handle return from intr to Delay SlotVineet Gupta3-0/+53
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: Support for ARCv2 ISA and HS38x coresVineet Gupta8-21/+278
The notable features are: - SMP configurations of upto 4 cores with coherency - Optional L2 Cache and IO-Coherency - Revised Interrupt Architecture (multiple priorites, reg banks, auto stack switch, auto regfile save/restore) - MMUv4 (PIPT dcache, Huge Pages) - Instructions for * 64bit load/store: LDD, STD * Hardware assisted divide/remainder: DIV, REM * Function prologue/epilogue: ENTER_S, LEAVE_S * IRQ enable/disable: CLRI, SETI * pop count: FFS, FLS * SETcc, BMSKN, XBFU... Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARCv2: [intc] HS38 core interrupt controllerVineet Gupta1-0/+143
Cc: Jason Cooper <jason@lakedaemon.net> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-22ARC: uncached base is hard constant for ARC, don't save itVineet Gupta1-2/+2
ioremap already uses the hard define, just make sure BCR value matches that Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: intc: split into ARCompact ISA specific, common bitsVineet Gupta4-213/+228
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: Make way for pt_regs != user_regs_structVineet Gupta2-9/+137
These have been register compatible so far. However ARCv2 mandates different pt_regs layout (due to h/w auto save). To keep pt_regs same for both, we start by removing the assumption - used mainly for block copies between the 2 structs in signal handling and ptrace Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: use single EXCEPTION_PROLOGUEVineet Gupta1-8/+6
Returning from pure kernel mode and exception mode use the same code anyways. Remove one the duplicate blocks Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: micro-optimize Trap handlerVineet Gupta1-2/+2
Elide the need to re-read ECR in Trap handler by ensuring that EXCEPTION_PROLOGUE does that at the very end just before returning to Trap handler ARCv2 EXCEPTION_PROLOGUE already did that, so same for ARcompact and the common trap handler adjusted to use cached ECR Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: move some code around for cache locality in return pathVineet Gupta2-48/+52
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: split into ARCompact ISA specific, common bitsVineet Gupta3-384/+402
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: Ensure that restore_regs is local to compilation unitVineet Gupta1-4/+4
This fixes the possible link/relo errors, since restore_regs will be provided by ISA code, but called from ARC common code. The .L prefix reassures binutils that it will be in same compilation unit. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: comments cleanupVineet Gupta1-26/+20
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: Trap handler to use r10 for syscall vs. brkpt decisionVineet Gupta1-2/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: FAKE_RET_FROM_EXCPN can always use r9Vineet Gupta1-13/+11
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: confine EXCEPTION_* macros to one fileVineet Gupta1-0/+16
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: canonical'ize EXCEPTION_{PROLOGUE,EPILOGUE}Vineet Gupta1-2/+2
-EXCEPTION_EPILOGUE introduced -EXCEPTION_PROLOGUE now also includes reg file saving Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: Introduce INTERRUPT_{PROLOGUE,EPILOGUE}Vineet Gupta1-18/+4
-common'ize macros for level 1 and level 2 interrupts Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: entry.S: common'ize scrtach reg freeup in intr + exceptionsVineet Gupta1-8/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: [axs101] support early 8250 uartVineet Gupta1-0/+2
Earlycon calculates UART clock as "BASE_BAUD * 16". In case of ARC "BASE_BAUD" is calculated dynamically in runtime, basically it is an alias to arc_early_base_baud(), which in turn just does "arc_base_baud/16". 8250 UART on AXS/SDP board uses 33.3MHz clock source which is set in "arc_base_baud" with this change. Additional compatibility string "snps,arc-sdp" is introduced as well because there're different flavours of AXS boards but they all share the same motherboard and so it's possible to re-use the same code for motherbord even if CPU daughterboard changes. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: stack unwinder to bail if PC is not kernel modeVineet Gupta1-10/+8
Currently, it doesn't invoke the callback but continues to unwind Also while at it - simplify the code a bit Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: perf: Remove unnecessary local variableTobias Klauser1-4/+2
Directly return the result of perf_pmu_register() in arc_pmu_device_probe() instead of assigning and returning variable ret. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19arc: fix use of uninitialized arc_pmuMax Filippov1-1/+0
static arc_pmu in the arch/arc/kernel/perf_event.c is not initialized as it's shadowed by a local variable of the same name in the arc_pmu_device_probe. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Fixes: 03c94fcf954d "ARC: perf: make @arc_pmu static global" CC: <stable@vger.kernel.org> # 4.1 Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: fix section mismatch with allyesconfigVineet Gupta1-1/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: explicit'ify uboot supportVineet Gupta2-1/+6
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: clocksource cleanupsVineet Gupta1-10/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-06-19ARC: RIP broken 64bit RTSCVineet Gupta2-54/+3
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-04-24Merge tag 'arc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arcLinus Torvalds4-22/+69
Pull ARC updates from Vineet Gupta: - perf fixes/improvements - misc cleanups * tag 'arc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: perf: don't add code for impossible case ARC: perf: Rename DT binding to not confuse with power mgmt ARC: perf: add user space attribution in callchains ARC: perf: Add kernel callchain support ARC: perf: support cache hit/miss ratio ARC: perf: Add some comments/debug stuff ARC: perf: make @arc_pmu static global ARC: mem init spring cleaning - No functional changes ARC: Fix RTT boot printing ARC: fold __builtin_constant_p() into test_bit() ARC: rename unhandled exception handler ARC: cosmetic: Remove unused ECR bitfield masks ARC: Fix WRITE_BCR ARC: [nsimosci] Update defconfig arc: copy_thread(): rename 'arg' argument to 'kthread_arg'
2015-04-20ARC: perf: don't add code for impossible caseVineet Gupta1-4/+1
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2015-04-20ARC: perf: Rename DT binding to not confuse with power mgmtVineet Gupta1-2/+2
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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