diff options
Diffstat (limited to 'arch/arc/kernel')
-rw-r--r-- | arch/arc/kernel/ctx_sw.c | 13 | ||||
-rw-r--r-- | arch/arc/kernel/devtree.c | 2 | ||||
-rw-r--r-- | arch/arc/kernel/disasm.c | 2 | ||||
-rw-r--r-- | arch/arc/kernel/kprobes.c | 54 | ||||
-rw-r--r-- | arch/arc/kernel/perf_event.c | 27 | ||||
-rw-r--r-- | arch/arc/kernel/process.c | 15 | ||||
-rw-r--r-- | arch/arc/kernel/signal.c | 4 | ||||
-rw-r--r-- | arch/arc/kernel/smp.c | 2 | ||||
-rw-r--r-- | arch/arc/kernel/troubleshoot.c | 77 | ||||
-rw-r--r-- | arch/arc/kernel/unwind.c | 6 | ||||
-rw-r--r-- | arch/arc/kernel/vmlinux.lds.S | 1 |
11 files changed, 55 insertions, 148 deletions
diff --git a/arch/arc/kernel/ctx_sw.c b/arch/arc/kernel/ctx_sw.c index e172c3333a84..1a76f2d6f694 100644 --- a/arch/arc/kernel/ctx_sw.c +++ b/arch/arc/kernel/ctx_sw.c @@ -14,9 +14,6 @@ #include <asm/asm-offsets.h> #include <linux/sched.h> #include <linux/sched/debug.h> -#ifdef CONFIG_ARC_PLAT_EZNPS -#include <plat/ctop.h> -#endif #define KSP_WORD_OFF ((TASK_THREAD + THREAD_KSP) / 4) @@ -68,16 +65,9 @@ __switch_to(struct task_struct *prev_task, struct task_struct *next_task) #ifndef CONFIG_SMP "st %2, [@_current_task] \n\t" #else -#ifdef CONFIG_ARC_PLAT_EZNPS - "lr r24, [%4] \n\t" -#ifndef CONFIG_EZNPS_MTM_EXT - "lsr r24, r24, 4 \n\t" -#endif -#else "lr r24, [identity] \n\t" "lsr r24, r24, 8 \n\t" "bmsk r24, r24, 7 \n\t" -#endif "add2 r24, @_current_task, r24 \n\t" "st %2, [r24] \n\t" #endif @@ -115,9 +105,6 @@ __switch_to(struct task_struct *prev_task, struct task_struct *next_task) : "=r"(tmp) : "n"(KSP_WORD_OFF), "r"(next), "r"(prev) -#ifdef CONFIG_ARC_PLAT_EZNPS - , "i"(CTOP_AUX_LOGIC_GLOBAL_ID) -#endif : "blink" ); diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c index fa86d13df5ed..721d465f1580 100644 --- a/arch/arc/kernel/devtree.c +++ b/arch/arc/kernel/devtree.c @@ -29,8 +29,6 @@ static void __init arc_set_early_base_baud(unsigned long dt_root) else if (of_flat_dt_is_compatible(dt_root, "snps,arc-sdp") || of_flat_dt_is_compatible(dt_root, "snps,hsdk")) arc_base_baud = 33333333; /* Fixed 33MHz clk (AXS10x & HSDK) */ - else if (of_flat_dt_is_compatible(dt_root, "ezchip,arc-nps")) - arc_base_baud = 800000000; /* Fixed 800MHz clk (NPS) */ else arc_base_baud = 50000000; /* Fixed default 50MHz */ } diff --git a/arch/arc/kernel/disasm.c b/arch/arc/kernel/disasm.c index d04837d91b40..03f8b1be0c3a 100644 --- a/arch/arc/kernel/disasm.c +++ b/arch/arc/kernel/disasm.c @@ -339,7 +339,7 @@ void __kprobes disasm_instr(unsigned long addr, struct disasm_state *state, case op_LDWX_S: /* LDWX_S c, [b, u6] */ state->x = 1; - /* intentional fall-through */ + fallthrough; case op_LDW_S: /* LDW_S c, [b, u6] */ state->zz = 2; diff --git a/arch/arc/kernel/kprobes.c b/arch/arc/kernel/kprobes.c index 7d3efe83cba7..cabef45f11df 100644 --- a/arch/arc/kernel/kprobes.c +++ b/arch/arc/kernel/kprobes.c @@ -388,6 +388,7 @@ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, { ri->ret_addr = (kprobe_opcode_t *) regs->blink; + ri->fp = NULL; /* Replace the return addr with trampoline addr */ regs->blink = (unsigned long)&kretprobe_trampoline; @@ -396,58 +397,7 @@ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, static int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs) { - struct kretprobe_instance *ri = NULL; - struct hlist_head *head, empty_rp; - struct hlist_node *tmp; - unsigned long flags, orig_ret_address = 0; - unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline; - - INIT_HLIST_HEAD(&empty_rp); - kretprobe_hash_lock(current, &head, &flags); - - /* - * It is possible to have multiple instances associated with a given - * task either because an multiple functions in the call path - * have a return probe installed on them, and/or more than one return - * return probe was registered for a target function. - * - * We can handle this because: - * - instances are always inserted at the head of the list - * - when multiple return probes are registered for the same - * function, the first instance's ret_addr will point to the - * real return address, and all the rest will point to - * kretprobe_trampoline - */ - hlist_for_each_entry_safe(ri, tmp, head, hlist) { - if (ri->task != current) - /* another task is sharing our hash bucket */ - continue; - - if (ri->rp && ri->rp->handler) - ri->rp->handler(ri, regs); - - orig_ret_address = (unsigned long)ri->ret_addr; - recycle_rp_inst(ri, &empty_rp); - - if (orig_ret_address != trampoline_address) { - /* - * This is the real return address. Any other - * instances associated with this task are for - * other calls deeper on the call stack - */ - break; - } - } - - kretprobe_assert(ri, orig_ret_address, trampoline_address); - regs->ret = orig_ret_address; - - kretprobe_hash_unlock(current, &flags); - - hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) { - hlist_del(&ri->hlist); - kfree(ri); - } + regs->ret = __kretprobe_trampoline_handler(regs, &kretprobe_trampoline, NULL); /* By returning a non zero value, we are telling the kprobe handler * that we don't want the post_handler to run diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c index 661fd842ea97..145722f80c9b 100644 --- a/arch/arc/kernel/perf_event.c +++ b/arch/arc/kernel/perf_event.c @@ -562,7 +562,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev) { struct arc_reg_pct_build pct_bcr; struct arc_reg_cc_build cc_bcr; - int i, has_interrupts; + int i, has_interrupts, irq = -1; int counter_size; /* in bits */ union cc_name { @@ -638,22 +638,25 @@ static int arc_pmu_device_probe(struct platform_device *pdev) }; if (has_interrupts) { - int irq = platform_get_irq(pdev, 0); + irq = platform_get_irq(pdev, 0); + if (irq >= 0) { + int ret; - if (irq < 0) { - pr_err("Cannot get IRQ number for the platform\n"); - return -ENODEV; - } + arc_pmu->irq = irq; - arc_pmu->irq = irq; + /* intc map function ensures irq_set_percpu_devid() called */ + ret = request_percpu_irq(irq, arc_pmu_intr, "ARC perf counters", + this_cpu_ptr(&arc_pmu_cpu)); - /* intc map function ensures irq_set_percpu_devid() called */ - request_percpu_irq(irq, arc_pmu_intr, "ARC perf counters", - this_cpu_ptr(&arc_pmu_cpu)); + if (!ret) + on_each_cpu(arc_cpu_pmu_irq_init, &irq, 1); + else + irq = -1; + } - on_each_cpu(arc_cpu_pmu_irq_init, &irq, 1); + } - } else + if (irq == -1) arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT; /* diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c index efeba1fe7252..37f724ad5e39 100644 --- a/arch/arc/kernel/process.c +++ b/arch/arc/kernel/process.c @@ -116,17 +116,6 @@ void arch_cpu_idle(void) :"I"(arg)); /* can't be "r" has to be embedded const */ } -#elif defined(CONFIG_EZNPS_MTM_EXT) /* ARC700 variant in NPS */ - -void arch_cpu_idle(void) -{ - /* only the calling HW thread needs to sleep */ - __asm__ __volatile__( - ".word %0 \n" - : - :"i"(CTOP_INST_HWSCHD_WFT_IE12)); -} - #else /* ARC700 */ void arch_cpu_idle(void) @@ -278,10 +267,6 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp) */ regs->status32 = STATUS_U_MASK | STATUS_L_MASK | ISA_INIT_STATUS_BITS; -#ifdef CONFIG_EZNPS_MTM_EXT - regs->eflags = 0; -#endif - fpu_init_task(regs); /* bogus seed values for debugging */ diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c index 3d57ed0d8535..2be55fb96d87 100644 --- a/arch/arc/kernel/signal.c +++ b/arch/arc/kernel/signal.c @@ -321,7 +321,7 @@ static void arc_restart_syscall(struct k_sigaction *ka, struct pt_regs *regs) regs->r0 = -EINTR; break; } - /* fallthrough */ + fallthrough; case -ERESTARTNOINTR: /* @@ -394,6 +394,6 @@ void do_notify_resume(struct pt_regs *regs) * ASM glue gaurantees that this is only called when returning to * user mode */ - if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) + if (test_thread_flag(TIF_NOTIFY_RESUME)) tracehook_notify_resume(regs); } diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c index eca35e02ce06..52906d314537 100644 --- a/arch/arc/kernel/smp.c +++ b/arch/arc/kernel/smp.c @@ -226,7 +226,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) } if (!cpu_online(cpu)) { - pr_info("Timeout: CPU%u FAILED to comeup !!!\n", cpu); + pr_info("Timeout: CPU%u FAILED to come up !!!\n", cpu); return -1; } diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c index 28e8bf04b253..a331bb5d8319 100644 --- a/arch/arc/kernel/troubleshoot.c +++ b/arch/arc/kernel/troubleshoot.c @@ -18,44 +18,37 @@ #define ARC_PATH_MAX 256 -/* - * Common routine to print scratch regs (r0-r12) or callee regs (r13-r25) - * -Prints 3 regs per line and a CR. - * -To continue, callee regs right after scratch, special handling of CR - */ -static noinline void print_reg_file(long *reg_rev, int start_num) +static noinline void print_regs_scratch(struct pt_regs *regs) { - unsigned int i; - char buf[512]; - int n = 0, len = sizeof(buf); - - for (i = start_num; i < start_num + 13; i++) { - n += scnprintf(buf + n, len - n, "r%02u: 0x%08lx\t", - i, (unsigned long)*reg_rev); - - if (((i + 1) % 3) == 0) - n += scnprintf(buf + n, len - n, "\n"); - - /* because pt_regs has regs reversed: r12..r0, r25..r13 */ - if (is_isa_arcv2() && start_num == 0) - reg_rev++; - else - reg_rev--; - } - - if (start_num != 0) - n += scnprintf(buf + n, len - n, "\n\n"); + pr_cont("BTA: 0x%08lx\n SP: 0x%08lx FP: 0x%08lx BLK: %pS\n", + regs->bta, regs->sp, regs->fp, (void *)regs->blink); + pr_cont("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n", + regs->lp_start, regs->lp_end, regs->lp_count); - /* To continue printing callee regs on same line as scratch regs */ - if (start_num == 0) - pr_info("%s", buf); - else - pr_cont("%s\n", buf); + pr_info("r00: 0x%08lx\tr01: 0x%08lx\tr02: 0x%08lx\n" \ + "r03: 0x%08lx\tr04: 0x%08lx\tr05: 0x%08lx\n" \ + "r06: 0x%08lx\tr07: 0x%08lx\tr08: 0x%08lx\n" \ + "r09: 0x%08lx\tr10: 0x%08lx\tr11: 0x%08lx\n" \ + "r12: 0x%08lx\t", + regs->r0, regs->r1, regs->r2, + regs->r3, regs->r4, regs->r5, + regs->r6, regs->r7, regs->r8, + regs->r9, regs->r10, regs->r11, + regs->r12); } -static void show_callee_regs(struct callee_regs *cregs) +static void print_regs_callee(struct callee_regs *regs) { - print_reg_file(&(cregs->r13), 13); + pr_cont("r13: 0x%08lx\tr14: 0x%08lx\n" \ + "r15: 0x%08lx\tr16: 0x%08lx\tr17: 0x%08lx\n" \ + "r18: 0x%08lx\tr19: 0x%08lx\tr20: 0x%08lx\n" \ + "r21: 0x%08lx\tr22: 0x%08lx\tr23: 0x%08lx\n" \ + "r24: 0x%08lx\tr25: 0x%08lx\n", + regs->r13, regs->r14, + regs->r15, regs->r16, regs->r17, + regs->r18, regs->r19, regs->r20, + regs->r21, regs->r22, regs->r23, + regs->r24, regs->r25); } static void print_task_path_n_nm(struct task_struct *tsk) @@ -175,7 +168,7 @@ static void show_ecr_verbose(struct pt_regs *regs) void show_regs(struct pt_regs *regs) { struct task_struct *tsk = current; - struct callee_regs *cregs; + struct callee_regs *cregs = (struct callee_regs *)tsk->thread.callee_reg; /* * generic code calls us with preemption disabled, but some calls @@ -204,25 +197,15 @@ void show_regs(struct pt_regs *regs) STS_BIT(regs, A2), STS_BIT(regs, A1), STS_BIT(regs, E2), STS_BIT(regs, E1)); #else - pr_cont(" [%2s%2s%2s%2s]", + pr_cont(" [%2s%2s%2s%2s] ", STS_BIT(regs, IE), (regs->status32 & STATUS_U_MASK) ? "U " : "K ", STS_BIT(regs, DE), STS_BIT(regs, AE)); #endif - pr_cont(" BTA: 0x%08lx\n SP: 0x%08lx FP: 0x%08lx BLK: %pS\n", - regs->bta, regs->sp, regs->fp, (void *)regs->blink); - pr_info("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n", - regs->lp_start, regs->lp_end, regs->lp_count); - - /* print regs->r0 thru regs->r12 - * Sequential printing was generating horrible code - */ - print_reg_file(&(regs->r0), 0); - /* If Callee regs were saved, display them too */ - cregs = (struct callee_regs *)current->thread.callee_reg; + print_regs_scratch(regs); if (cregs) - show_callee_regs(cregs); + print_regs_callee(cregs); preempt_disable(); } diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c index f87758a6851b..74ad4256022e 100644 --- a/arch/arc/kernel/unwind.c +++ b/arch/arc/kernel/unwind.c @@ -572,7 +572,7 @@ static unsigned long read_pointer(const u8 **pLoc, const void *end, #else BUILD_BUG_ON(sizeof(u32) != sizeof(value)); #endif - /* Fall through */ + fallthrough; case DW_EH_PE_native: if (end < (const void *)(ptr.pul + 1)) return 0; @@ -827,7 +827,7 @@ static int processCFI(const u8 *start, const u8 *end, unsigned long targetLoc, case DW_CFA_def_cfa: state->cfa.reg = get_uleb128(&ptr.p8, end); unw_debug("cfa_def_cfa: r%lu ", state->cfa.reg); - /* fall through */ + fallthrough; case DW_CFA_def_cfa_offset: state->cfa.offs = get_uleb128(&ptr.p8, end); unw_debug("cfa_def_cfa_offset: 0x%lx ", @@ -835,7 +835,7 @@ static int processCFI(const u8 *start, const u8 *end, unsigned long targetLoc, break; case DW_CFA_def_cfa_sf: state->cfa.reg = get_uleb128(&ptr.p8, end); - /* fall through */ + fallthrough; case DW_CFA_def_cfa_offset_sf: state->cfa.offs = get_sleb128(&ptr.p8, end) * state->dataAlign; diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S index 54139a6f469b..33ce59d91461 100644 --- a/arch/arc/kernel/vmlinux.lds.S +++ b/arch/arc/kernel/vmlinux.lds.S @@ -122,6 +122,7 @@ SECTIONS _end = . ; STABS_DEBUG + ELF_DETAILS DISCARDS .arcextmap 0 : { |