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2020-03-25.gitignore: add SPDX License IdentifierMasahiro Yamada1-0/+1
Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2020-03-16ARC: allow userspace DSP applications to use AGU extensionsEugeniy Paltsev1-0/+6
To be able to run DSP-enabled userspace applications with AGU (address generation unit) extensions we additionally need to save and restore following registers at context switch: * AGU_AP* * AGU_OS* * AGU_MOD* Reviewed-by: Vineet Gupta <[email protected]> Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2020-03-16ARC: add support for DSP-enabled userspace applicationsEugeniy Paltsev1-0/+4
To be able to run DSP-enabled userspace applications we need to save and restore following DSP-related registers: At IRQ/exception entry/exit: * DSP_CTRL (save it and reset to value suitable for kernel) * ACC0_LO, ACC0_HI (we already save them as r58, r59 pair) At context switch: * ACC0_GLO, ACC0_GHI * DSP_BFLY0, DSP_FFT_CTRL Reviewed-by: Vineet Gupta <[email protected]> Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2020-03-16ARC: handle DSP presence in HWEugeniy Paltsev2-0/+7
When DSP extensions are present, some of the regular integer instructions such as DIV, MACD etc are executed in the DSP unit with semantics alterable by flags in DSP_CTRL aux register. This register is writable by userspace and thus can potentially affect corresponding instructions in kernel code, intentionally or otherwise. So safegaurd kernel by effectively disabling DSP_CTRL upon bootup and every entry to kernel. Do note that for this config we simply zero out the DSP_CTRL reg assuming userspace doesn't really care about DSP. The next patch caters to the DSP aware userspace where this reg is saved/restored upon kernel entry/exit. Reviewed-by: Vineet Gupta <[email protected]> Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2020-03-16ARC: add helpers to sanitize config optionsEugeniy Paltsev1-13/+12
We'll use this macro in coming patches extensively. Reviewed-by: Vineet Gupta <[email protected]> Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2020-03-11ARC: show_regs: reduce lines of outputVineet Gupta1-15/+12
Before ------ | CPU: 1 PID: 29061 Comm: tst-dynarray-at Not tainted 5.6.0-rc1-00002-g941fcc018ca6-dirty #12 | | [ECR ]: 0x00090000 => | [EFA ]: 0x00000000 | [ERET ]: 0x2004aa6c | @off 0x2aa6c in [/lib/libc-2.31.9000.so] VMA: 0x20020000 to 0x20122000 | [STAT32]: 0x80080a82 [IE U ] | BTA: 0x2004aa18 SP: 0x5ffff8a8 FP: 0x5ffff8fc | LPS: 0x2008788e LPE: 0x20087896 LPC: 0x00000000 | r00: 0x00000000 r01: 0x5ffff8a8 r02: 0x00000000 | r03: 0x00000008 r04: 0xffffffff r05: 0x00000000 | r06: 0x00000000 r07: 0x00000000 r08: 0x00000087 | r09: 0x00000000 r10: 0x2010691c r11: 0x00000020 | r12: 0x2003b214 r13: 0x5ffff8a8 r14: 0x20126e68 | r15: 0x2001f26c r16: 0x2012a000 r17: 0x00000001 | r18: 0x5ffff8fc r19: 0x00000000 r20: 0x5ffff948 | r21: 0x00000001 r22: 0xffffffff r23: 0x5fffff8c | r24: 0x4008c2a8 r25: 0x2001f6e0 After ----- | CPU: 1 PID: 29061 Comm: tst-dynarray-at Not tainted 5.6.0-rc1-00002-g941fcc018ca6-dirty #12 | @off 0x2aa6c in [/lib/libc-2.31.9000.so] VMA: 0x20020000 to 0x20122000 | ECR: 0x00090000 EFA: 0x00000000 ERET: 0x2004aa6c | STAT32: 0x80080a82 [IE U ] BTA: 0x2004aa18 | BLK: 0x2003b214 SP: 0x5ffff8a8 FP: 0x5ffff8fc | LPS: 0x2008788e LPE: 0x20087896 LPC: 0x00000000 | r00: 0x00000000 r01: 0x5ffff8a8 r02: 0x00000000 | r03: 0x00000008 r04: 0xffffffff r05: 0x00000000 | r06: 0x00000000 r07: 0x00000000 r08: 0x00000087 | r09: 0x00000000 r10: 0x2010691c r11: 0x00000020 | r12: 0x2003b214 r13: 0x5ffff8a8 r14: 0x20126e68 | r15: 0x2001f26c r16: 0x2012a000 r17: 0x00000001 | r18: 0x5ffff8fc r19: 0x00000000 r20: 0x5ffff948 | r21: 0x00000001 r22: 0xffffffff r23: 0x5fffff8c | r24: 0x4008c2a8 r25: 0x2001f6e0 BTA: 0x2004aa18 Signed-off-by: Vineet Gupta <[email protected]>
2020-02-12ARC: Replace <linux/clk-provider.h> by <linux/of_clk.h>Geert Uytterhoeven1-1/+1
The ARC platform code is not a clock provider, and just needs to call of_clk_init(). Hence it can include <linux/of_clk.h> instead of <linux/clk-provider.h>. Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Stephen Boyd <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2020-01-31Merge tag 'arc-5.6-rc1' of ↵Linus Torvalds5-6/+51
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC updates from Vineet Gupta: - Wire up clone3 syscall - ARCv2 FPU state save/restore across context switch - AXS10x platform and misc fixes * tag 'arc-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARCv2: fpu: preserve userspace fpu state ARC: fpu: declutter code, move bits out into fpu.h ARC: wireup clone3 syscall ARC: [plat-axs10x]: Add missing multicast filter number to GMAC node ARC: update feature support for jump-labels
2020-01-29Merge tag 'tty-5.6-rc1' of ↵Linus Torvalds1-4/+0
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here are the big set of tty and serial driver updates for 5.6-rc1 Included in here are: - dummy_con cleanups (touches lots of arch code) - sysrq logic cleanups (touches lots of serial drivers) - samsung driver fixes (wasn't really being built) - conmakeshash move to tty subdir out of scripts - lots of small tty/serial driver updates All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits) tty: n_hdlc: Use flexible-array member and struct_size() helper tty: baudrate: SPARC supports few more baud rates tty: baudrate: Synchronise baud_table[] and baud_bits[] tty: serial: meson_uart: Add support for kernel debugger serial: imx: fix a race condition in receive path serial: 8250_bcm2835aux: Document struct bcm2835aux_data serial: 8250_bcm2835aux: Use generic remapping code serial: 8250_bcm2835aux: Allocate uart_8250_port on stack serial: 8250_bcm2835aux: Suppress register_port error on -EPROBE_DEFER serial: 8250_bcm2835aux: Suppress clk_get error on -EPROBE_DEFER serial: 8250_bcm2835aux: Fix line mismatch on driver unbind serial_core: Remove unused member in uart_port vt: Correct comment documenting do_take_over_console() vt: Delete comment referencing non-existent unbind_con_driver() arch/xtensa/setup: Drop dummy_con initialization arch/x86/setup: Drop dummy_con initialization arch/unicore32/setup: Drop dummy_con initialization arch/sparc/setup: Drop dummy_con initialization arch/sh/setup: Drop dummy_con initialization arch/s390/setup: Drop dummy_con initialization ...
2020-01-28Merge branch 'sched-core-for-linus' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler updates from Ingo Molnar: "These were the main changes in this cycle: - More -rt motivated separation of CONFIG_PREEMPT and CONFIG_PREEMPTION. - Add more low level scheduling topology sanity checks and warnings to filter out nonsensical topologies that break scheduling. - Extend uclamp constraints to influence wakeup CPU placement - Make the RT scheduler more aware of asymmetric topologies and CPU capacities, via uclamp metrics, if CONFIG_UCLAMP_TASK=y - Make idle CPU selection more consistent - Various fixes, smaller cleanups, updates and enhancements - please see the git log for details" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (58 commits) sched/fair: Define sched_idle_cpu() only for SMP configurations sched/topology: Assert non-NUMA topology masks don't (partially) overlap idle: fix spelling mistake "iterrupts" -> "interrupts" sched/fair: Remove redundant call to cpufreq_update_util() sched/psi: create /proc/pressure and /proc/pressure/{io|memory|cpu} only when psi enabled sched/fair: Fix sgc->{min,max}_capacity calculation for SD_OVERLAP sched/fair: calculate delta runnable load only when it's needed sched/cputime: move rq parameter in irqtime_account_process_tick stop_machine: Make stop_cpus() static sched/debug: Reset watchdog on all CPUs while processing sysrq-t sched/core: Fix size of rq::uclamp initialization sched/uclamp: Fix a bug in propagating uclamp value in new cgroups sched/fair: Load balance aggressively for SCHED_IDLE CPUs sched/fair : Improve update_sd_pick_busiest for spare capacity case watchdog: Remove soft_lockup_hrtimer_cnt and related code sched/rt: Make RT capacity-aware sched/fair: Make EAS wakeup placement consider uclamp restrictions sched/fair: Make task_fits_capacity() consider uclamp restrictions sched/uclamp: Rename uclamp_util_with() into uclamp_rq_util_with() sched/uclamp: Make uclamp util helpers use and return UL values ...
2020-01-17ARCv2: fpu: preserve userspace fpu stateVineet Gupta3-1/+34
Signed-off-by: Vineet Gupta <[email protected]>
2020-01-17ARC: fpu: declutter code, move bits out into fpu.hVineet Gupta1-1/+1
Signed-off-by: Vineet Gupta <[email protected]>
2020-01-15ARC: wireup clone3 syscallVineet Gupta3-4/+16
Signed-off-by: Vineet Gupta <[email protected]>
2020-01-14arch/arc/setup: Drop dummy_con initializationArvind Sankar1-4/+0
con_init in tty/vt.c will now set conswitchp to dummy_con if it's unset. Drop it from arch setup code. Signed-off-by: Arvind Sankar <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2020-01-06Merge tag 'arc-5.5-rc6' of ↵Linus Torvalds1-1/+9
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fixes from Vineet Gupta: "Kconfig warning, stale define, duplicate asm-offset entry ..." * tag 'arc-5.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: pt_regs: remove hardcoded registers offset ARC: asm-offsets: remove duplicate entry ARC: mm: drop stale define of __ARCH_USE_5LEVEL_HACK arc: eznps: fix allmodconfig kconfig warning
2019-12-28ARC: pt_regs: remove hardcoded registers offsetEugeniy Paltsev1-0/+9
Replace hardcoded registers offset numbers by calculated via offsetof. Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2019-12-25Merge tag 'v5.5-rc3' into sched/core, to pick up fixesIngo Molnar3-3/+174
Signed-off-by: Ingo Molnar <[email protected]>
2019-12-19ARC: asm-offsets: remove duplicate entryEugeniy Paltsev1-1/+0
We define 'PT_user_r25' twice in asm-offsets.c It's not a big issue as we define it to the same value, however let's fix it. Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2019-12-09treewide: Use sizeof_field() macroPankaj Bharadiya1-3/+3
Replace all the occurrences of FIELD_SIZEOF() with sizeof_field() except at places where these are defined. Later patches will remove the unused definition of FIELD_SIZEOF(). This patch is generated using following script: EXCLUDE_FILES="include/linux/stddef.h|include/linux/kernel.h" git grep -l -e "\bFIELD_SIZEOF\b" | while read file; do if [[ "$file" =~ $EXCLUDE_FILES ]]; then continue fi sed -i -e 's/\bFIELD_SIZEOF\b/sizeof_field/g' $file; done Signed-off-by: Pankaj Bharadiya <[email protected]> Link: https://lore.kernel.org/r/[email protected] Co-developed-by: Kees Cook <[email protected]> Signed-off-by: Kees Cook <[email protected]> Acked-by: David Miller <[email protected]> # for net
2019-12-08sched/rt, ARC: Use CONFIG_PREEMPTIONThomas Gleixner1-3/+3
CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT. Both PREEMPT and PREEMPT_RT require the same functionality which today depends on CONFIG_PREEMPT. Switch the entry code over to use CONFIG_PREEMPTION. Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Sebastian Andrzej Siewior <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: [email protected] Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2019-12-04Merge tag 'arc-5.5-rc1' of ↵Linus Torvalds2-0/+171
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC updates from Vineet Gupta - Jump Label support for ARC - kmemleak enabled - arc mm backend TLB Miss / flush optimizations - nSIM platform switching to dwuart (vs. arcuart) and ensuing defconfig updates and cleanups - axs platform pll / video-mode updates * tag 'arc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: add kmemleak support ARC: [plat-axs10x]: remove hardcoded video mode from bootargs ARC: [plat-axs10x]: use pgu pll instead of fixed clock ARC: ARCv2: jump label: implement jump label patching ARC: mm: tlb flush optim: elide redundant uTLB invalidates for MMUv3 ARC: mm: tlb flush optim: elide repeated uTLB invalidate in loop ARC: mm: tlb flush optim: Make TLBWriteNI fallback to TLBWrite if not available ARC: mm: TLB Miss optim: avoid re-reading ECR ARCv2: mm: TLB Miss optim: Use double world load/stores LDD/STD ARCv2: mm: TLB Miss optim: SMP builds can cache pgd pointer in mmu scratch reg ARC: nSIM_700: remove unused network options ARC: nSIM_700: switch to DW UART usage ARC: merge HAPS-HS with nSIM-HS configs ARC: HAPS: cleanup defconfigs from unused ETH drivers ARC: HAPS: add HIGHMEM memory zone to DTS ARC: HAPS: use same UART configuration everywhere ARC: HAPS: cleanup defconfigs from unused IO-related options ARC: regenerate nSIM and HAPS defconfigs
2019-11-26Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds1-4/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 asm updates from Ingo Molnar: "The main changes in this cycle were: - Cross-arch changes to move the linker sections for NOTES and EXCEPTION_TABLE into the RO_DATA area, where they belong on most architectures. (Kees Cook) - Switch the x86 linker fill byte from x90 (NOP) to 0xcc (INT3), to trap jumps into the middle of those padding areas instead of sliding execution. (Kees Cook) - A thorough cleanup of symbol definitions within x86 assembler code. The rather randomly named macros got streamlined around a (hopefully) straightforward naming scheme: SYM_START(name, linkage, align...) SYM_END(name, sym_type) SYM_FUNC_START(name) SYM_FUNC_END(name) SYM_CODE_START(name) SYM_CODE_END(name) SYM_DATA_START(name) SYM_DATA_END(name) etc - with about three times of these basic primitives with some label, local symbol or attribute variant, expressed via postfixes. No change in functionality intended. (Jiri Slaby) - Misc other changes, cleanups and smaller fixes" * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits) x86/entry/64: Remove pointless jump in paranoid_exit x86/entry/32: Remove unused resume_userspace label x86/build/vdso: Remove meaningless CFLAGS_REMOVE_*.o m68k: Convert missed RODATA to RO_DATA x86/vmlinux: Use INT3 instead of NOP for linker fill bytes x86/mm: Report actual image regions in /proc/iomem x86/mm: Report which part of kernel image is freed x86/mm: Remove redundant address-of operators on addresses xtensa: Move EXCEPTION_TABLE to RO_DATA segment powerpc: Move EXCEPTION_TABLE to RO_DATA segment parisc: Move EXCEPTION_TABLE to RO_DATA segment microblaze: Move EXCEPTION_TABLE to RO_DATA segment ia64: Move EXCEPTION_TABLE to RO_DATA segment h8300: Move EXCEPTION_TABLE to RO_DATA segment c6x: Move EXCEPTION_TABLE to RO_DATA segment arm64: Move EXCEPTION_TABLE to RO_DATA segment alpha: Move EXCEPTION_TABLE to RO_DATA segment x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment x86/vmlinux: Actually use _etext for the end of the text segment vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA ...
2019-11-08ARC: ARCv2: jump label: implement jump label patchingEugeniy Paltsev2-0/+171
Implement jump label patching for ARC. Jump labels provide an interface to generate dynamic branches using self-modifying code. This allows us to implement conditional branches where changing branch direction is expensive but branch selection is basically 'free' This implementation uses 32-bit NOP and BRANCH instructions which forced to be aligned by 4 to guarantee that they don't cross L1 cache line boundary and can be update atomically. Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2019-11-04vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATAKees Cook1-1/+1
Rename RW_DATA_SECTION to RW_DATA. (Calling this a "section" is a lie, since it's multiple sections and section flags cannot be applied to the macro.) Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Acked-by: Heiko Carstens <[email protected]> # s390 Acked-by: Geert Uytterhoeven <[email protected]> # m68k Cc: Andy Lutomirski <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Dave Hansen <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Michael Ellerman <[email protected]> Cc: Michal Simek <[email protected]> Cc: Rick Edgecombe <[email protected]> Cc: Segher Boessenkool <[email protected]> Cc: Will Deacon <[email protected]> Cc: x86-ml <[email protected]> Cc: Yoshinori Sato <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2019-11-04vmlinux.lds.h: Replace RO_DATA_SECTION with RO_DATAKees Cook1-1/+1
Finish renaming RO_DATA_SECTION to RO_DATA. (Calling this a "section" is a lie, since it's multiple sections and section flags cannot be applied to the macro.) Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Acked-by: Heiko Carstens <[email protected]> # s390 Acked-by: Geert Uytterhoeven <[email protected]> # m68k Cc: Andy Lutomirski <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Dave Hansen <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Michael Ellerman <[email protected]> Cc: Michal Simek <[email protected]> Cc: Rick Edgecombe <[email protected]> Cc: Segher Boessenkool <[email protected]> Cc: Will Deacon <[email protected]> Cc: x86-ml <[email protected]> Cc: Yoshinori Sato <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2019-11-04vmlinux.lds.h: Move NOTES into RO_DATAKees Cook1-2/+0
The .notes section should be non-executable read-only data. As such, move it to the RO_DATA macro instead of being per-architecture defined. Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Acked-by: Heiko Carstens <[email protected]> # s390 Cc: Andy Lutomirski <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Dave Hansen <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Michael Ellerman <[email protected]> Cc: Michal Simek <[email protected]> Cc: Rick Edgecombe <[email protected]> Cc: Segher Boessenkool <[email protected]> Cc: Will Deacon <[email protected]> Cc: x86-ml <[email protected]> Cc: Yoshinori Sato <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2019-10-22ARC: perf: Accommodate big-endian CPUAlexey Brodkin1-2/+2
8-letter strings representing ARC perf events are stores in two 32-bit registers as ASCII characters like that: "IJMP", "IALL", "IJMPTAK" etc. And the same order of bytes in the word is used regardless CPU endianness. Which means in case of big-endian CPU core we need to swap bytes to get the same order as if it was on little-endian CPU. Otherwise we're seeing the following error message on boot: ------------------------->8---------------------- ARC perf : 8 counters (32 bits), 40 conditions, [overflow IRQ support] sysfs: cannot create duplicate filename '/devices/arc_pct/events/pmji' CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.2.18 #3 Stack Trace: arc_unwind_core+0xd4/0xfc dump_stack+0x64/0x80 sysfs_warn_dup+0x46/0x58 sysfs_add_file_mode_ns+0xb2/0x168 create_files+0x70/0x2a0 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at kernel/events/core.c:12144 perf_event_sysfs_init+0x70/0xa0 Failed to register pmu: arc_pct, reason -17 Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.2.18 #3 Stack Trace: arc_unwind_core+0xd4/0xfc dump_stack+0x64/0x80 __warn+0x9c/0xd4 warn_slowpath_fmt+0x22/0x2c perf_event_sysfs_init+0x70/0xa0 ---[ end trace a75fb9a9837bd1ec ]--- ------------------------->8---------------------- What happens here we're trying to register more than one raw perf event with the same name "PMJI". Why? Because ARC perf events are 4 to 8 letters and encoded into two 32-bit words. In this particular case we deal with 2 events: * "IJMP____" which counts all jump & branch instructions * "IJMPC___" which counts only conditional jumps & branches Those strings are split in two 32-bit words this way "IJMP" + "____" & "IJMP" + "C___" correspondingly. Now if we read them swapped due to CPU core being big-endian then we read "PMJI" + "____" & "PMJI" + "___C". And since we interpret read array of ASCII letters as a null-terminated string on big-endian CPU we end up with 2 events of the same name "PMJI". Signed-off-by: Alexey Brodkin <[email protected]> Cc: [email protected] Signed-off-by: Vineet Gupta <[email protected]>
2019-08-29Merge tag 'Wimplicit-fallthrough-5.3-rc7' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux Pull fallthrough fixes from Gustavo A. R. Silva: "Fix fall-through warnings on arc and nds32 for multiple configurations" * tag 'Wimplicit-fallthrough-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: nds32: Mark expected switch fall-throughs ARC: unwind: Mark expected switch fall-through
2019-08-29ARC: unwind: Mark expected switch fall-throughGustavo A. R. Silva1-0/+1
Mark switch cases where we are expecting to fall through. This patch fixes the following warnings (Building: haps_hs_defconfig arc): arch/arc/kernel/unwind.c: In function ‘read_pointer’: ./include/linux/compiler.h:328:5: warning: this statement may fall through [-Wimplicit-fallthrough=] do { \ ^ ./include/linux/compiler.h:338:2: note: in expansion of macro ‘__compiletime_assert’ __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~~~~~~~~~~~~ ./include/linux/compiler.h:350:2: note: in expansion of macro ‘_compiletime_assert’ _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’ #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:50:2: note: in expansion of macro ‘BUILD_BUG_ON_MSG’ BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ arch/arc/kernel/unwind.c:573:3: note: in expansion of macro ‘BUILD_BUG_ON’ BUILD_BUG_ON(sizeof(u32) != sizeof(value)); ^~~~~~~~~~~~ arch/arc/kernel/unwind.c:575:2: note: here case DW_EH_PE_native: ^~~~ Signed-off-by: Gustavo A. R. Silva <[email protected]>
2019-08-26ARCv2: IDU-intc: Add support for edge-triggered interruptsMischa Jonker1-6/+54
This adds support for an optional extra interrupt cell to specify edge vs level triggered. It is backward compatible with dts files with only one cell, and will default to level-triggered in such a case. Note that I had to make a change to idu_irq_set_affinity as well, as this function was setting the interrupt type to "level" unconditionally, since this was the only type supported previously. Signed-off-by: Mischa Jonker <[email protected]> Reviewed-by: Vineet Gupta <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2019-08-06ARC: unwind: Mark expected switch fall-throughsGustavo A. R. Silva1-2/+2
Mark switch cases where we are expecting to fall through. This patch fixes the following warnings (Building: haps_hs_defconfig arc): arch/arc/kernel/unwind.c:827:20: warning: this statement may fall through [-Wimplicit-fallthrough=] arch/arc/kernel/unwind.c:836:20: warning: this statement may fall through [-Wimplicit-fallthrough=] Reviewed-by: Kees Cook <[email protected]> Signed-off-by: Gustavo A. R. Silva <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2019-07-16Merge tag 'arc-5.3-rc1' of ↵Linus Torvalds5-58/+26
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC updates from Vineet Gupta: - long due rewrite of do_page_fault - refactoring of entry/exit code to utilize the double load/store instructions - hsdk platform updates * tag 'arc-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [plat-hsdk]: Enable AXI DW DMAC in defconfig ARC: [plat-hsdk]: enable DW SPI controller ARC: hide unused function unw_hdr_alloc ARC: [haps] Add Virtio support ARCv2: entry: simplify return to Delay Slot via interrupt ARC: entry: EV_Trap expects r10 (vs. r9) to have exception cause ARCv2: entry: rewrite to enable use of double load/stores LDD/STD ARCv2: entry: avoid a branch ARCv2: entry: push out the Z flag unclobber from common EXCEPTION_PROLOGUE ARCv2: entry: comments about hardware auto-save on taken interrupts ARC: mm: do_page_fault refactor #8: release mmap_sem sooner ARC: mm: do_page_fault refactor #7: fold the various error handling ARC: mm: do_page_fault refactor #6: error handlers to use same pattern ARC: mm: do_page_fault refactor #5: scoot no_context to end ARC: mm: do_page_fault refactor #4: consolidate retry related logic ARC: mm: do_page_fault refactor #3: tidyup vma access permission code ARC: mm: do_page_fault refactor #2: remove short lived variable ARC: mm: do_page_fault refactor #1: remove label @good_area
2019-07-08Merge branch 'siginfo-linus' of ↵Linus Torvalds3-4/+4
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull force_sig() argument change from Eric Biederman: "A source of error over the years has been that force_sig has taken a task parameter when it is only safe to use force_sig with the current task. The force_sig function is built for delivering synchronous signals such as SIGSEGV where the userspace application caused a synchronous fault (such as a page fault) and the kernel responded with a signal. Because the name force_sig does not make this clear, and because the force_sig takes a task parameter the function force_sig has been abused for sending other kinds of signals over the years. Slowly those have been fixed when the oopses have been tracked down. This set of changes fixes the remaining abusers of force_sig and carefully rips out the task parameter from force_sig and friends making this kind of error almost impossible in the future" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (27 commits) signal/x86: Move tsk inside of CONFIG_MEMORY_FAILURE in do_sigbus signal: Remove the signal number and task parameters from force_sig_info signal: Factor force_sig_info_to_task out of force_sig_info signal: Generate the siginfo in force_sig signal: Move the computation of force into send_signal and correct it. signal: Properly set TRACE_SIGNAL_LOSE_INFO in __send_signal signal: Remove the task parameter from force_sig_fault signal: Use force_sig_fault_to_task for the two calls that don't deliver to current signal: Explicitly call force_sig_fault on current signal/unicore32: Remove tsk parameter from __do_user_fault signal/arm: Remove tsk parameter from __do_user_fault signal/arm: Remove tsk parameter from ptrace_break signal/nds32: Remove tsk parameter from send_sigtrap signal/riscv: Remove tsk parameter from do_trap signal/sh: Remove tsk parameter from force_sig_info_fault signal/um: Remove task parameter from send_sigtrap signal/x86: Remove task parameter from send_sigtrap signal: Remove task parameter from force_sig_mceerr signal: Remove task parameter from force_sig signal: Remove task parameter from force_sigsegv ...
2019-07-08ARC: hide unused function unw_hdr_allocArnd Bergmann1-5/+4
As kernelci.org reports, this function is not used in vdk_hs38_defconfig: arch/arc/kernel/unwind.c:188:14: warning: 'unw_hdr_alloc' defined but not used [-Wunused-function] Fixes: bc79c9a72165 ("ARC: dw2 unwind: Reinstante unwinding out of modules") Link: https://kernelci.org/build/id/5d1cae3f59b514300340c132/logs/ Cc: [email protected] Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2019-07-08ARCv2: entry: simplify return to Delay Slot via interruptVineet Gupta1-48/+10
Commit 4255b07f2c9c43540 ("ARCv2: STAR 9000793984: Handle return from intr to Delay Slot") involved a complex 2 staged trampoline. Apparently this can be greatly simplified by returning from pure kernel mode (iso interrupt) so drop to pure kernel mdoe and execute the normal exception return path. Testing this was a bit of challenge as return from interrupt is rarely executed now after commit 4de0e52867d83105767 ("ARCv2: STAR 9000814690: Really Re-enable interrupts to avoid deadlocks"). That fix is necessary evil and pct interrupts etc do exercise intr return path. Anyhow after a revert of above in my local test setup I was able to hit this case and verify the patch works. Signed-off-by: Vineet Gupta <[email protected]>
2019-07-08ARC: entry: EV_Trap expects r10 (vs. r9) to have exception causeVineet Gupta2-3/+3
avoids 1 MOV instruction in light of double load/store code Signed-off-by: Vineet Gupta <[email protected]>
2019-07-01ARCv2: entry: rewrite to enable use of double load/stores LDD/STDVineet Gupta2-2/+9
- the motivation was to be remove blatent copy-paste due to hasty support of CONFIG_ARC_IRQ_NO_AUTOSAVE support - but with refactoring we could use LDD/STD to greatly optimize the code Signed-off-by: Vineet Gupta <[email protected]>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner31-128/+31
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Enrico Weigelt <[email protected]> Reviewed-by: Kate Stewart <[email protected]> Reviewed-by: Allison Randal <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 332Thomas Gleixner1-3/+1
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as publishhed by the free software foundation extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 48 file(s). Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Alexios Zavras <[email protected]> Reviewed-by: Kate Stewart <[email protected]> Reviewed-by: Allison Randal <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2019-05-29signal: Remove the task parameter from force_sig_faultEric W. Biederman1-1/+1
As synchronous exceptions really only make sense against the current task (otherwise how are you synchronous) remove the task parameter from from force_sig_fault to make it explicit that is what is going on. The two known exceptions that deliver a synchronous exception to a stopped ptraced task have already been changed to force_sig_fault_to_task. The callers have been changed with the following emacs regular expression (with obvious variations on the architectures that take more arguments) to avoid typos: force_sig_fault[(]\([^,]+\)[,]\([^,]+\)[,]\([^,]+\)[,]\W+current[)] -> force_sig_fault(\1,\2,\3) Signed-off-by: "Eric W. Biederman" <[email protected]>
2019-05-29signal: Explicitly call force_sig_fault on currentEric W. Biederman1-1/+1
Update the calls of force_sig_fault that pass in a variable that is set to current earlier to explicitly use current. This is to make the next change that removes the task parameter from force_sig_fault easier to verify. Signed-off-by: "Eric W. Biederman" <[email protected]>
2019-05-27signal: Remove task parameter from force_sigEric W. Biederman2-2/+2
All of the remaining callers pass current into force_sig so remove the task parameter to make this obvious and to make misuse more difficult in the future. This also makes it clear force_sig passes current into force_sig_info. Signed-off-by: "Eric W. Biederman" <[email protected]>
2019-05-27signal: Remove task parameter from force_sigsegvEric W. Biederman1-1/+1
The function force_sigsegv is always called on the current task so passing in current is redundant and not passing in current makes this fact obvious. This also makes it clear force_sigsegv always calls force_sig on the current task. Signed-off-by: "Eric W. Biederman" <[email protected]>
2019-03-20Merge tag 'arc-5.1-rc2' of ↵Linus Torvalds4-107/+117
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC updates from Vineet Gupta: - unaligned access support for HS cores - Removed extra memory barrier around spinlock code - HSDK platform updates: enable dmac, reset - some more boot logging updates - misc minor fixes * tag 'arc-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: arch: arc: Kconfig: pedantic formatting ARCv2: spinlock: remove the extra smp_mb before lock, after unlock ARC: unaligned: relax the check for gcc supporting -mno-unaligned-access ARC: boot log: cut down on verbosity ARCv2: boot log: refurbish HS core/release identification arc: hsdk_defconfig: Enable CONFIG_BLK_DEV_RAM ARC: u-boot args: check that magic number is correct ARC: perf: bpok condition only exists for ARCompact ARCv2: Add explcit unaligned access support (and ability to disable too) ARCv2: lib: introduce memcpy optimized for unaligned access ARC: [plat-hsdk]: Enable AXI DW DMAC support ARC: [plat-hsdk]: Add reset controller handle to manage USB reset ARC: DTB: [scripted] fix node name and address spelling
2019-03-12memblock: drop memblock_alloc_*_nopanic() variantsMike Rapoport1-2/+1
As all the memblock allocation functions return NULL in case of error rather than panic(), the duplicates with _nopanic suffix can be removed. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> Reviewed-by: Petr Mladek <[email protected]> [printk] Cc: Catalin Marinas <[email protected]> Cc: Christophe Leroy <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Dennis Zhou <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Greentime Hu <[email protected]> Cc: Guan Xuetao <[email protected]> Cc: Guo Ren <[email protected]> Cc: Guo Ren <[email protected]> [c-sky] Cc: Heiko Carstens <[email protected]> Cc: Juergen Gross <[email protected]> [Xen] Cc: Mark Salter <[email protected]> Cc: Matt Turner <[email protected]> Cc: Max Filippov <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Simek <[email protected]> Cc: Paul Burton <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rich Felker <[email protected]> Cc: Rob Herring <[email protected]> Cc: Rob Herring <[email protected]> Cc: Russell King <[email protected]> Cc: Stafford Horne <[email protected]> Cc: Tony Luck <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Yoshinori Sato <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2019-03-05ARC: unaligned: relax the check for gcc supporting -mno-unaligned-accessVineet Gupta1-12/+0
Without bleeding edge gcc, kernel builds were tripping everywhere. So current gcc will generate unaligned code despite !CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS but that is something we have to live with. Signed-off-by: Vineet Gupta <[email protected]>
2019-02-25ARC: boot log: cut down on verbosityVineet Gupta1-52/+32
The syscall ABI has long been fixed, so no need to call that out now. Also, there's no need to print really fine details such as norm, barrel-shifter etc. Those are given in a Linux enabled hardware config. So now we print just 1 line for all optional "instruction" related hardware features | | ISA Extn : atomic ll64 unalign mpy[opt 9] div_rem vs. 2 before | |ISA Extn : atomic ll64 unalign | : mpy[opt 9] div_rem norm barrel-shift swap minmax swape Signed-off-by: Vineet Gupta <[email protected]>
2019-02-25ARCv2: boot log: refurbish HS core/release identificationVineet Gupta1-56/+74
HS core names and releases have so far been identified based solely on IDENTIFY.ARCVER field. With the future HS releases this will not be sufficient as same ARCVER 0x54 could be an HS38 or HS48. So rewrite the code to use a new BCR to identify the cores properly. Signed-off-by: Vineet Gupta <[email protected]>
2019-02-25ARC: u-boot args: check that magic number is correctEugeniy Paltsev2-0/+9
In case of devboards we really often disable bootloader and load Linux image in memory via JTAG. Even if kernel tries to verify uboot_tag and uboot_arg there is sill a chance that we treat some garbage in registers as valid u-boot arguments in JTAG case. E.g. it is enough to have '1' in r0 to treat any value in r2 as a boot command line. So check that magic number passed from u-boot is correct and drop u-boot arguments otherwise. That helps to reduce the possibility of using garbage as u-boot arguments in JTAG case. We can safely check U-boot magic value (0x0) in linux passed via r1 register as U-boot pass it from the beginning. So there is no backward-compatibility issues. Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2019-02-25ARCv2: Add explcit unaligned access support (and ability to disable too)Eugeniy Paltsev4-11/+26
As of today we enable unaligned access unconditionally on ARCv2. Do this under a Kconfig option to allow disable it for test, benchmarking etc. Also while at it - Select HAVE_EFFICIENT_UNALIGNED_ACCESS - Although gcc defaults to unaligned access (since GNU 2018.03), add the right toggles for enabling or disabling as appropriate - update bootlog to prints both HW feature status (exists, enabled/disabled) and SW status (used / not used). - wire up the relaxed memcpy for unaligned access Signed-off-by: Eugeniy Paltsev <[email protected]> Signed-off-by: Vineet Gupta <[email protected]> [vgupta: squashed patches, handle gcc -mno-unaligned-access quick]
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