- 12 Apr, 2017 20 commits
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Ralf Baechle authored
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Paul Burton authored
Commit 41c594ab ("[MIPS] MT: Improved multithreading support.") added an else case to an if statement in do_page_fault() (which has since gained 2 leading underscores) for some unclear reason. If the condition in the if statement evaluates true then we execute a goto & branch elsewhere anyway, so the else has no effect. Combined with an #if 0 block with misleading indentation introduced in the same commit it makes the code less clear than it could be. Remove the unnecessary else statement & de-indent the printk within the #if 0 block in order to make the code easier for humans to parse. Signed-off-by:
Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15842/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Paul Burton authored
Commit fbde2d7d ("MIPS: Add generic SMP IPI support") introduced a sanity check that an IPI IRQ domain can be found during boot, in order to ensure that IPIs are able to be set up in systems using such domains. However it was added at a point where systems may have used an IPI IRQ domain in some situations but not others, and we could not know which were the case until runtime, so commit 578bffc8 ("MIPS: Don't BUG_ON when no IPI domain is found") made that check simply skip IPI init if no domain were found in order to fix the boot for systems such as QEMU Malta. We now use IPI IRQ domains for the MIPS CPU interrupt controller, which means systems which make use of IPI IRQ domains will always do so when running on multiple CPUs. As a result we now strengthen the sanity check to ensure that an IPI IRQ domain is found when multiple CPUs are present in the system. Signed-off-by:
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Paul Burton authored
Remove the smp-mt IPI code that supported single-core multithreaded systems and instead make use of the IPI IRQ domain support provided by the MIPS CPU interrupt controller driver. This removes some less than nice code, the horrible split between arch & board code and the duplication that led to within board code. The lantiq portion of this patch has only been compile tested. Malta has been tested & is functional. Signed-off-by:
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Paul Burton authored
Introduce support for registering an IPI IRQ domain suitable for use by systems using the MIPS MT (multithreading) ASE within a single core. This will allow for such systems to be supported generically, without the current kludge of IPI code split between the MIPS arch & the malta board support code. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15836/Signed-off-by:
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Paul Burton authored
The various struct irq_chip callbacks in the MIPS CPU interrupt controller driver have been calculating the hardware interrupt number by subtracting MIPS_CPU_IRQ_BASE from the virq number. This presumes a linear mapping beginning from MIPS_CPU_IRQ_BASE, and this will not hold once an IPI IRQ domain is introduced. Switch to using the hwirq field of struct irq_data which already contains the hardware interrupt number instead of attempting to calculate it. Similarly, plat_irq_dispatch calculated the virq number by adding MIPS_CPU_IRQ_BASE to the hardware interrupt number. Ready this for the introduction of an IPI IRQ domain by instead using irq_linear_revmap. Signed-off-by:
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Paul Burton authored
Replace use of the magic number 0x100 (ie. bit 8) with the more explanatory IE_SW0 (ie. interrupt enable for software interrupt 0) or C_SW0 (ie. cause bit for software interrupt 0) as appropriate. Signed-off-by:
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James Hogan authored
KGDB is a kernel debug stub and it can't be used to debug userland as it can only safely access kernel memory. On MIPS however KGDB has always got the register state of sleeping processes from the userland register context at the beginning of the kernel stack. This is meaningless for kernel threads (which never enter userland), and for user threads it prevents the user seeing what it is doing while in the kernel: (gdb) info threads Id Target Id Frame ... 3 Thread 2 (kthreadd) 0x0000000000000000 in ?? () 2 Thread 1 (init) 0x000000007705c4b4 in ?? () 1 Thread -2 (shadowCPU0) 0xffffffff8012524c in arch_kgdb_breakpoint () at arch/mips/kernel/kgdb.c:201 Get the register state instead from the (partial) kernel register context stored in the task's thread_struct for resume() to restore. All threads now correctly appear to be in context_switch(): (gdb) info threads Id Target Id Frame ... 3 Thread 2 (kthreadd) context_switch (rq=<optimized out>, cookie=..., next=<optimized out>, prev=0x0) at kernel/sched/core.c:2903 2 Thread 1 (init) context_switch (rq=<optimized out>, cookie=..., next=<optimized out>, prev=0x0) at kernel/sched/core.c:2903 1 Thread -2 (shadowCPU0) 0xffffffff8012524c in arch_kgdb_breakpoint () at arch/mips/kernel/kgdb.c:201 Call clobbered registers which aren't saved and exception registers (BadVAddr & Cause) which can't be easily determined without stack unwinding are reported as 0. The PC is taken from the return address, such that the state presented matches that found immediately after returning from resume(). Fixes: 88547001 ("[MIPS] kgdb: add arch support for the kernel's kgdb core") Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15829/Signed-off-by:
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Paul Burton authored
We declare CONFIG_ARCH_HAS_ILOG2_U32 & CONFIG_ARCH_HAS_ILOG2_U64 in Kconfig, but they are always false since nothing ever selects them. The generic fls-based implementation is efficient for MIPS anyway. Remove the redundant Kconfig entries. Signed-off-by:
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Matt Redfearn authored
Turning on DEBUG in smp-cps.c, or compiling the kernel with CONFIG_DYNAMIC_DEBUG enabled results the build error: arch/mips/kernel/smp-cps.c: In function 'play_dead': ./include/linux/dynamic_debug.h:126:3: error: 'core' may be used uninitialized in this function [-Werror=maybe-uninitialized] Fix this by always initialising the variable. Fixes: 0d2808f3 ("MIPS: smp-cps: Add support for CPU hotplug of MIPSr6 processors") Signed-off-by:
Matt Redfearn <matt.redfearn@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15848/Signed-off-by:
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Matt Redfearn authored
The generic_defconfig is used for platforms like SEAD3 which do not usually have fixed storage available, therefore NFS is the preferred location of the RFS. When the upstream kernel defconfig is built & tested on platforms such as SEAD3 this leads to essentially false failures when the RFS fails to mount. There is little harm in having this feature enabled by default, so enable it in the defconfig. Kernel autoconfiguration & DHCP must also be selected to allow RFS on NFS. Signed-off-by:
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Matt Redfearn authored
After the split of linux/sched.h, KASLR stopped building. Fix this by including the correct header file for init_thread_union Signed-off-by:
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James Cowgill authored
arch_check_elf contains a usage of current_cpu_data that will call smp_processor_id() with preemption enabled and therefore triggers a "BUG: using smp_processor_id() in preemptible" warning when an fpxx executable is loaded. As a follow-up to commit b244614a ("MIPS: Avoid a BUG warning during prctl(PR_SET_FP_MODE, ...)"), apply the same fix to arch_check_elf by using raw_current_cpu_data instead. The rationale quoted from the previous commit: "It is assumed throughout the kernel that if any CPU has an FPU, then all CPUs would have an FPU as well, so it is safe to perform the check with preemption enabled - change the code to use raw_ variant of the check to avoid the warning." Fixes: 46490b57 ("MIPS: kernel: elf: Improve the overall ABI and FPU mode checks") Signed-off-by:
James Cowgill <James.Cowgill@imgtec.com> CC: <stable@vger.kernel.org> # 4.0+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15951/Signed-off-by:
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James Cowgill authored
In commit 827456e7 ("MIPS: Export _mcount alongside its definition") the EXPORT_SYMBOL macro exporting _mcount was moved from C code into assembly. Unlike C, exported assembly symbols need to have a function prototype in asm/asm-prototypes.h for modversions to work properly. Without this, modpost prints out this warning: WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned. Fix by including asm/ftrace.h (where _mcount is declared) in asm/asm-prototypes.h. Fixes: 827456e7 ("MIPS: Export _mcount alongside its definition") Signed-off-by:
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Marcin Nowakowski authored
cpu-feautre-overrides.h in mach-rm unnecessarily includes itself, so drop the pointless include Signed-off-by:
Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15462/Signed-off-by:
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James Cowgill authored
This the mips version of commit c1bd55f9 ("x86: opt into HAVE_COPY_THREAD_TLS, for both 32-bit and 64-bit"). Simply use the tls system call argument instead of extracting the tls argument by magic from the pt_regs structure. See commit 3033f14a ("clone: support passing tls argument via C rather than pt_regs magic") for more background. Signed-off-by:
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Sebastian Andrzej Siewior authored
It is pure mystery to me why we need to be on a specific CPU while looking up a value in an array. My best shot at this is that before commit d4019f0a ("cpufreq: move freq change notifications to cpufreq core") it was required to invoke cpufreq_notify_transition() on a special CPU. Since it looks like a waste, remove it. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by:
Viresh Kumar <viresh.kumar@linaro.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: tglx@linutronix.de Cc: linux-pm@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15888/Signed-off-by:
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Paul Burton authored
We always either target MIPS32/MIPS64 or microMIPS, and always include one & only one of uasm-mips.c or uasm-micromips.c. Therefore the abstraction of the ISA in asm/uasm.h declaring functions for either ISA is redundant & needless. Remove it to simplify the code. This is largely the result of the following: :%s/ISAOPC(\(.\{-}\))/uasm_i##\1/ :%s/ISAFUNC(\(.\{-}\))/\1/ Signed-off-by: -
Matt Redfearn authored
Commit 1a3d5957 ("MIPS: Tidy up FPU context switching") removed the last usage of the macro ST_OFF. Remove the dead code. Signed-off-by:
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Marcin Nowakowski authored
Replace the open-coded CPU-offline notification with common code. In particular avoid calling scheduler code using RCU from an offline CPU that RCU is ignoring. Signed-off-by:
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- 11 Apr, 2017 1 commit
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Marcin Nowakowski authored
When specifying a generic defconfig target with O=... option set, make is invoked in the output location before a target makefile wrapper is created. Ensure that the correct makefile is used by specifying the kernel source makefile during make invocation. This fixes the either of the following errors: $ make sead3_defoncifg ARCH=mips O=test make[1]: Entering directory '/mnt/ssd/MIPS/linux-next/test' make[2]: *** No rule to make target '32r2el_defconfig'. Stop. arch/mips/Makefile:506: recipe for target 'sead3_defconfig' failed make[1]: *** [sead3_defconfig] Error 2 make[1]: Leaving directory '/mnt/ssd/MIPS/linux-next/test' Makefile:152: recipe for target 'sub-make' failed make: *** [sub-make] Error 2 $ make 32r2el_defconfig ARCH=mips O=test make[1]: Entering directory '/mnt/ssd/MIPS/linux-next/test' Using ../arch/mips/configs/generic_defconfig as base Merging ../arch/mips/configs/generic/32r2.config Merging ../arch/mips/configs/generic/el.config Merging ../arch/mips/configs/generic/board-sead-3.config ! ! merged configuration written to .config (needs make) ! make[2]: *** No rule to make target 'olddefconfig'. Stop. arch/mips/Makefile:489: recipe for target '32r2el_defconfig' failed make[1]: *** [32r2el_defconfig] Error 2 make[1]: Leaving directory '/mnt/ssd/MIPS/linux-next/test' Makefile:152: recipe for target 'sub-make' failed make: *** [sub-make] Error 2 Fixes: eed0eabd ('MIPS: generic: Introduce generic DT-based board support') Fixes: 3f5f0a44 ('MIPS: generic: Convert SEAD-3 to a generic board') Signed-off-by:
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- 10 Apr, 2017 19 commits
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James Hogan authored
calculate_min_delta() may incorrectly access a 4th element of buf2[] which only has 3 elements. This may trigger undefined behaviour and has been reported to cause strange crashes in start_kernel() sometime after timer initialization when built with GCC 5.3, possibly due to register/stack corruption: sched_clock: 32 bits at 200MHz, resolution 5ns, wraps every 10737418237ns CPU 0 Unable to handle kernel paging request at virtual address ffffb0aa, epc == 8067daa8, ra == 8067da84 Oops[#1]: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.18 #51 task: 8065e3e0 task.stack: 80644000 $ 0 : 00000000 00000001 00000000 00000000 $ 4 : 8065b4d0 00000000 805d0000 00000010 $ 8 : 00000010 80321400 fffff000 812de408 $12 : 00000000 00000000 00000000 ffffffff $16 : 00000002 ffffffff 80660000 806a666c $20 : 806c0000 00000000 00000000 00000000 $24 : 00000000 00000010 $28 : 80644000 80645ed0 00000000 8067da84 Hi : 00000000 Lo : 00000000 epc : 8067daa8 start_kernel+0x33c/0x500 ra : 8067da84 start_kernel+0x318/0x500 Status: 11000402 KERNEL EXL Cause : 4080040c (ExcCode 03) BadVA : ffffb0aa PrId : 0501992c (MIPS 1004Kc) Modules linked in: Process swapper/0 (pid: 0, threadinfo=80644000, task=8065e3e0, tls=00000000) Call Trace: [<8067daa8>] start_kernel+0x33c/0x500 Code: 24050240 0c0131f9 24849c64 <a200b0a8> 41606020 000000c0 0c1a45e6 00000000 0c1a5f44 UBSAN also detects the same issue: ================================================================ UBSAN: Undefined behaviour in arch/mips/kernel/cevt-r4k.c:85:41 load of address 80647e4c with insufficient space for an object of type 'unsigned int' CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.18 #47 Call Trace: [<80028f70>] show_stack+0x88/0xa4 [<80312654>] dump_stack+0x84/0xc0 [<8034163c>] ubsan_epilogue+0x14/0x50 [<803417d8>] __ubsan_handle_type_mismatch+0x160/0x168 [<8002dab0>] r4k_clockevent_init+0x544/0x764 [<80684d34>] time_init+0x18/0x90 [<8067fa5c>] start_kernel+0x2f0/0x500 ================================================================= buf2[] is intentionally only 3 elements so that the last element is the median once 5 samples have been inserted, so explicitly prevent the possibility of comparing against the 4th element rather than extending the array. Fixes: 1fa40555 ("MIPS: cevt-r4k: Dynamically calculate min_delta_ns") Reported-by:
Rabin Vincent <rabinv@axis.com> Signed-off-by:
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Rabin Vincent authored
mipsxx_pmu_handle_shared_irq() calls irq_work_run() while holding the pmuint_rwlock for read. irq_work_run() can, via perf_pending_event(), call try_to_wake_up() which can try to take rq->lock. However, perf can also call perf_pmu_enable() (and thus take the pmuint_rwlock for write) while holding the rq->lock, from finish_task_switch() via perf_event_context_sched_in(). This leads to an ABBA deadlock: PID: 3855 TASK: 8f7ce288 CPU: 2 COMMAND: "process" #0 [89c39ac8] __delay at 803b5be4 #1 [89c39ac8] do_raw_spin_lock at 8008fdcc #2 [89c39af8] try_to_wake_up at 8006e47c #3 [89c39b38] pollwake at 8018eab0 #4 [89c39b68] __wake_up_common at 800879f4 #5 [89c39b98] __wake_up at 800880e4 #6 [89c39bc8] perf_event_wakeup at 8012109c #7 [89c39be8] perf_pending_event at 80121184 #8 [89c39c08] irq_work_run_list at 801151f0 #9 [89c39c38] irq_work_run at 80115274 #10 [89c39c50] mipsxx_pmu_handle_shared_irq at 8002cc7c PID: 1481 TASK: 8eaac6a8 CPU: 3 COMMAND: "process" #0 [8de7f900] do_raw_write_lock at 800900e0 #1 [8de7f918] perf_event_context_sched_in at 80122310 #2 [8de7f938] __perf_event_task_sched_in at 80122608 #3 [8de7f958] finish_task_switch at 8006b8a4 #4 [8de7f998] __schedule at 805e4dc4 #5 [8de7f9f8] schedule at 805e5558 #6 [8de7fa10] schedule_hrtimeout_range_clock at 805e9984 #7 [8de7fa70] poll_schedule_timeout at 8018e8f8 #8 [8de7fa88] do_select at 8018f338 #9 [8de7fd88] core_sys_select at 8018f5cc #10 [8de7fee0] sys_select at 8018f854 #11 [8de7ff28] syscall_common at 80028fc8 The lock seems to be there to protect the hardware counters so there is no need to hold it across irq_work_run(). Signed-off-by:
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Matt Redfearn authored
Since commit 4cfffcfa ("irqchip/mips-gic: Fix local interrupts"), the gic driver has been allocating virq's for local interrupts during its initialisation. Unfortunately on Malta platforms, these are the first IRQs to be allocated and so are allocated virqs 1-3. The i8259 driver uses a legacy irq domain which expects to map virqs 0-15. Probing of that driver therefore fails because some of those virqs are already taken, with the warning: WARNING: CPU: 0 PID: 0 at kernel/irq/irqdomain.c:344 irq_domain_associate+0x1e8/0x228 error: virq1 is already associated Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.10.0-rc6-00011-g4cfffcfa #368 Stack : 00000000 00000000 807ae03a 0000004d 00000000 806c1010 0000000b ffff0a01 80725467 807258f4 806a64a4 00000000 00000000 807a9acc 00000100 80713e68 806d5598 8017593c 8072bf90 8072bf94 806ac358 00000000 806abb60 80713ce4 00000100 801b22d4 806d5598 8017593c 807ae03a 00000000 80713ce4 80720000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 ... Call Trace: [<8010c480>] show_stack+0x88/0xa4 [<80376758>] dump_stack+0x88/0xd0 [<8012c4a8>] __warn+0x104/0x118 [<8012c4ec>] warn_slowpath_fmt+0x30/0x3c [<8017edfc>] irq_domain_associate+0x1e8/0x228 [<8017efd0>] irq_domain_add_legacy+0x7c/0xb0 [<80764c50>] __init_i8259_irqs+0x64/0xa0 [<80764ca4>] i8259_of_init+0x18/0x74 [<8076ddc0>] of_irq_init+0x19c/0x310 [<80752dd8>] arch_init_irq+0x28/0x19c [<80750a08>] start_kernel+0x2a8/0x434 Fix this by reserving the required i8259 virqs in malta platform code before probing any irq chips. Fixes: 4cfffcfa ("irqchip/mips-gic: Fix local interrupts") Signed-off-by:
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Douglas Leung authored
Correct the treatment of branching conditions for BC1EQZ and BC1NEZ instructions in function isBranchInstr(). Previously, corresponding conditions were swapped, which in turn meant that, for these two instructions, function isBranchInstr() returned wrong value in its output parameter contpc. This change is actually an extension of the fix done by the commit 93583e17 ("MIPS: math-emu: Fix BC1{EQ,NE}Z emulation"). That commit dealt with a similar problem in function cop1Emulate(), while this commit deals with condition handling in function isBranchInstr(). The code styles of changes in these two commits are kept as consistent as possible. Signed-off-by:
Douglas Leung <douglas.leung@imgtec.com> Signed-off-by:
Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by:
Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by:
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Aleksandar Markovic authored
Add missing clearing of BLTZALL and BGEZALL emulation counters in function mipsr2_stats_clear_show(). Previously, it was not possible to reset BLTZALL and BGEZALL emulation counters - their value remained the same even after explicit request via debugfs. As far as other related counters are concerned, they all seem to be properly cleared. This change affects debugfs operation only, core R2 emulation functionality is not affected. Signed-off-by:
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Leonid Yegoshin authored
Fix the problem of inaccurate identification of instructions BLEZL and BGTZL in R2 emulation code by making sure all necessary encoding specifications are met. Previously, certain R6 instructions could be identified as BLEZL or BGTZL. R2 emulation routine didn't take into account that both BLEZL and BGTZL instructions require their rt field (bits 20 to 16 of instruction encoding) to be 0, and that, at same time, if the value in that field is not 0, the encoding may represent a legitimate MIPS R6 instruction. This means that a problem could occur after emulation optimization, when emulation routine tried to pipeline emulation, picked up a next candidate, and subsequently misrecognized an R6 instruction as BLEZL or BGTZL. It should be said that for single pass strategy, the problem does not happen because CPU doesn't trap on branch-compacts which share opcode space with BLEZL/BGTZL (but have rt field != 0, of course). Signed-off-by:
Leonid Yegoshin <leonid.yegoshin@imgtec.com> Signed-off-by:
Miodrag Dinic <miodrag.dinic@imgtech.com> Signed-off-by:
Aleksandar Markovic <aleksandar.markovic@imgtech.com> Reported-by:
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Huacai Chen authored
Some newer Loongson-3 have 64 bytes cache lines, so select MIPS_L1_CACHE_SHIFT_6. Signed-off-by:
Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J . Hill <Steven.Hill@caviumnetworks.com> Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15755/Signed-off-by:
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Ralf Baechle authored
<linux/cache.h> already defines SMP_CACHE_BYTES as L1_CACHE_BYTES. This change results in a build error in <asm/cpu-info.h> which directly includes <asm/cache.h>. Fix this by including <linux/cache.h> instead. Signed-off-by: -
Ralf Baechle authored
Signed-off-by: -
Ralf Baechle authored
Signed-off-by: -
Florian Fainelli authored
Using any value for W= will lead to a ton of warnings which are turned into fatal errors because MIPS adds -Werror to arch/mips/*. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Cc: linux-mips@linux-mips.org Cc: james.hogan@imgtec.com Patchwork: https://patchwork.linux-mips.org/patch/15785/Signed-off-by:
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Steven J. Hill authored
Remove unused headers and fix warnings from checkpatch. Signed-off-by:
Steven J. Hill <Steven.Hill@cavium.com> Acked-by:
David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15407/Signed-off-by:
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Steven J. Hill authored
Remove all unused bitfields and macros. Convert the remaining bitfields to use __BITFIELD_FIELD instead of #ifdef. [ralf@linux-mips.org: Add inclusions of <uapi/asm/bitfield.h> as necessary.] Signed-off-by:
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Steven J. Hill authored
Move all USB platform code to one place within the file. Signed-off-by:
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Steven J. Hill authored
Remove all unused bitfields and macros. Convert the remaining bitfields to use __BITFIELD_FIELD instead of #ifdef. [ralf@linux-mips.org: Add inclusions of <uapi/asm/bitfield.h> as necessary.] Signed-off-by:
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Steven J. Hill authored
Remove all unused bitfields and macros. Convert the remaining bitfields to use __BITFIELD_FIELD instead of #ifdef. [ralf@linux-mips.org: Add inclusions of <uapi/asm/bitfield.h> as necessary.] Signed-off-by:
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Alex Belits authored
Some users must have 4K pages while needing a 48-bit VA space size. The cleanest way do do this is to go to a 4-level page table for this case. Each page table level using order-0 pages adds 9 bits to the VA size (at 4K pages, so for four levels we get 9 * 4 + 12 == 48-bits. For the 4K page size case only we add support functions for the PUD level of the page table tree, also the TLB exception handlers get an extra level of tree walk. [david.daney@cavium.com: Forward port to v4.10.] [david.daney@cavium.com: Forward port to v4.11.] Signed-off-by:
Alex Belits <alex.belits@cavium.com> Signed-off-by:
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David Daney authored
This config option never really worked, and has bit-rotted to the point of being completely useless. Remove it completely. Signed-off-by:
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David Daney authored
o Socket data is unsigned, so use unsigned accessors instructions. o Fix path result pointer generation arithmetic. o Fix half-word byte swapping code for unsigned semantics. Signed-off-by:
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