21 files changed, 140 insertions, 149 deletions

diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index c1cd41456d42..cbe4742d2fff 100644
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -83,7 +83,7 @@ void output_task_defines(void)
 	OFFSET(TASK_FLAGS, task_struct, flags);
 	OFFSET(TASK_MM, task_struct, mm);
 	OFFSET(TASK_PID, task_struct, pid);
-#if defined(CONFIG_CC_STACKPROTECTOR)
+#if defined(CONFIG_STACKPROTECTOR)
 	OFFSET(TASK_STACK_CANARY, task_struct, stack_canary);
 #endif
 	DEFINE(TASK_STRUCT_SIZE, sizeof(struct task_struct));
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 6b07b739f914..b2509c19cfb5 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -414,6 +414,14 @@ static int __init ftlb_disable(char *s)
 
 __setup("noftlb", ftlb_disable);
 
+/*
+ * Check if the CPU has per tc perf counters
+ */
+static inline void cpu_set_mt_per_tc_perf(struct cpuinfo_mips *c)
+{
+	if (read_c0_config7() & MTI_CONF7_PTC)
+		c->options |= MIPS_CPU_MT_PER_TC_PERF_COUNTERS;
+}
 
 static inline void check_errata(void)
 {
@@ -1572,6 +1580,7 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
 		c->cputype = CPU_34K;
 		c->writecombine = _CACHE_UNCACHED;
 		__cpu_name[cpu] = "MIPS 34Kc";
+		cpu_set_mt_per_tc_perf(c);
 		break;
 	case PRID_IMP_74K:
 		c->cputype = CPU_74K;
@@ -1592,6 +1601,7 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
 		c->cputype = CPU_1004K;
 		c->writecombine = _CACHE_UNCACHED;
 		__cpu_name[cpu] = "MIPS 1004Kc";
+		cpu_set_mt_per_tc_perf(c);
 		break;
 	case PRID_IMP_1074K:
 		c->cputype = CPU_1074K;
@@ -1601,10 +1611,12 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
 	case PRID_IMP_INTERAPTIV_UP:
 		c->cputype = CPU_INTERAPTIV;
 		__cpu_name[cpu] = "MIPS interAptiv";
+		cpu_set_mt_per_tc_perf(c);
 		break;
 	case PRID_IMP_INTERAPTIV_MP:
 		c->cputype = CPU_INTERAPTIV;
 		__cpu_name[cpu] = "MIPS interAptiv (multi)";
+		cpu_set_mt_per_tc_perf(c);
 		break;
 	case PRID_IMP_PROAPTIV_UP:
 		c->cputype = CPU_PROAPTIV;
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 38a302919e6b..d7de8adcfcc8 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -79,6 +79,10 @@ FEXPORT(ret_from_fork)
 	jal	schedule_tail		# a0 = struct task_struct *prev
 
 FEXPORT(syscall_exit)
+#ifdef CONFIG_DEBUG_RSEQ
+	move	a0, sp
+	jal	rseq_syscall
+#endif
 	local_irq_disable		# make sure need_resched and
 					# signals dont change between
 					# sampling and return
@@ -141,6 +145,10 @@ work_notifysig:				# deal with pending signals and
 	j	resume_userspace_check
 
 FEXPORT(syscall_exit_partial)
+#ifdef CONFIG_DEBUG_RSEQ
+	move	a0, sp
+	jal	rseq_syscall
+#endif
 	local_irq_disable		# make sure need_resched doesn't
 					# change between and return
 	LONG_L	a2, TI_FLAGS($28)	# current->work
diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S
index f2ee7e1e3342..cff52b283e03 100644
--- a/arch/mips/kernel/mcount.S
+++ b/arch/mips/kernel/mcount.S
@@ -119,10 +119,20 @@ NESTED(_mcount, PT_SIZE, ra)
 EXPORT_SYMBOL(_mcount)
 	PTR_LA	t1, ftrace_stub
 	PTR_L	t2, ftrace_trace_function /* Prepare t2 for (1) */
-	bne	t1, t2, static_trace
+	beq	t1, t2, fgraph_trace
 	 nop
 
+	MCOUNT_SAVE_REGS
+
+	move	a0, ra		/* arg1: self return address */
+	jalr	t2		/* (1) call *ftrace_trace_function */
+	 move	a1, AT		/* arg2: parent's return address */
+
+	MCOUNT_RESTORE_REGS
+
+fgraph_trace:
 #ifdef	CONFIG_FUNCTION_GRAPH_TRACER
+	PTR_LA	t1, ftrace_stub
 	PTR_L	t3, ftrace_graph_return
 	bne	t1, t3, ftrace_graph_caller
 	 nop
@@ -131,24 +141,11 @@ EXPORT_SYMBOL(_mcount)
 	bne	t1, t3, ftrace_graph_caller
 	 nop
 #endif
-	b	ftrace_stub
-#ifdef CONFIG_32BIT
-	 addiu sp, sp, 8
-#else
-	 nop
-#endif
 
-static_trace:
-	MCOUNT_SAVE_REGS
-
-	move	a0, ra		/* arg1: self return address */
-	jalr	t2		/* (1) call *ftrace_trace_function */
-	 move	a1, AT		/* arg2: parent's return address */
-
-	MCOUNT_RESTORE_REGS
 #ifdef CONFIG_32BIT
 	addiu sp, sp, 8
 #endif
+
 	.globl ftrace_stub
 ftrace_stub:
 	RETURN_BACK
diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S
index e42113fe2762..896080b445c2 100644
--- a/arch/mips/kernel/octeon_switch.S
+++ b/arch/mips/kernel/octeon_switch.S
@@ -61,7 +61,7 @@
 #endif
 3:
 
-#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP)
+#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)
 	PTR_LA	t8, __stack_chk_guard
 	LONG_L	t9, TASK_STACK_CANARY(a1)
 	LONG_S	t9, 0(t8)
diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index ee73550f0b9a..413863508f6f 100644
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -129,20 +129,14 @@ static struct mips_pmu mipspmu;
 
 
 #ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
-static int cpu_has_mipsmt_pertccounters;
-
 static DEFINE_RWLOCK(pmuint_rwlock);
 
 #if defined(CONFIG_CPU_BMIPS5000)
 #define vpe_id()	(cpu_has_mipsmt_pertccounters ? \
 			 0 : (smp_processor_id() & MIPS_CPUID_TO_COUNTER_MASK))
 #else
-/*
- * FIXME: For VSMP, vpe_id() is redefined for Perf-events, because
- * cpu_data[cpuid].vpe_id reports 0 for _both_ CPUs.
- */
 #define vpe_id()	(cpu_has_mipsmt_pertccounters ? \
-			 0 : smp_processor_id())
+			 0 : cpu_vpe_id(&current_cpu_data))
 #endif
 
 /* Copied from op_model_mipsxx.c */
@@ -329,7 +323,11 @@ static int mipsxx_pmu_alloc_counter(struct cpu_hw_events *cpuc,
 
 static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
 {
+	struct perf_event *event = container_of(evt, struct perf_event, hw);
 	struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
+#ifdef CONFIG_MIPS_MT_SMP
+	unsigned int range = evt->event_base >> 24;
+#endif /* CONFIG_MIPS_MT_SMP */
 
 	WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
 
@@ -337,11 +335,37 @@ static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
 		(evt->config_base & M_PERFCTL_CONFIG_MASK) |
 		/* Make sure interrupt enabled. */
 		MIPS_PERFCTRL_IE;
-	if (IS_ENABLED(CONFIG_CPU_BMIPS5000))
+
+#ifdef CONFIG_CPU_BMIPS5000
+	{
 		/* enable the counter for the calling thread */
 		cpuc->saved_ctrl[idx] |=
 			(1 << (12 + vpe_id())) | BRCM_PERFCTRL_TC;
+	}
+#else
+#ifdef CONFIG_MIPS_MT_SMP
+	if (range > V) {
+		/* The counter is processor wide. Set it up to count all TCs. */
+		pr_debug("Enabling perf counter for all TCs\n");
+		cpuc->saved_ctrl[idx] |= M_TC_EN_ALL;
+	} else
+#endif /* CONFIG_MIPS_MT_SMP */
+	{
+		unsigned int cpu, ctrl;
+
+		/*
+		 * Set up the counter for a particular CPU when event->cpu is
+		 * a valid CPU number. Otherwise set up the counter for the CPU
+		 * scheduling this thread.
+		 */
+		cpu = (event->cpu >= 0) ? event->cpu : smp_processor_id();
 
+		ctrl = M_PERFCTL_VPEID(cpu_vpe_id(&cpu_data[cpu]));
+		ctrl |= M_TC_EN_VPE;
+		cpuc->saved_ctrl[idx] |= ctrl;
+		pr_debug("Enabling perf counter for CPU%d\n", cpu);
+	}
+#endif /* CONFIG_CPU_BMIPS5000 */
 	/*
 	 * We do not actually let the counter run. Leave it until start().
 	 */
@@ -655,13 +679,14 @@ static unsigned int mipspmu_perf_event_encode(const struct mips_perf_event *pev)
  * event_id.
  */
 #ifdef CONFIG_MIPS_MT_SMP
-	return ((unsigned int)pev->range << 24) |
-		(pev->cntr_mask & 0xffff00) |
-		(pev->event_id & 0xff);
-#else
-	return (pev->cntr_mask & 0xffff00) |
-		(pev->event_id & 0xff);
-#endif
+	if (num_possible_cpus() > 1)
+		return ((unsigned int)pev->range << 24) |
+			(pev->cntr_mask & 0xffff00) |
+			(pev->event_id & 0xff);
+	else
+#endif /* CONFIG_MIPS_MT_SMP */
+		return ((pev->cntr_mask & 0xffff00) |
+			(pev->event_id & 0xff));
 }
 
 static const struct mips_perf_event *mipspmu_map_general_event(int idx)
@@ -1265,37 +1290,6 @@ static const struct mips_perf_event xlp_cache_map
 },
 };
 
-#ifdef CONFIG_MIPS_MT_SMP
-static void check_and_calc_range(struct perf_event *event,
-				 const struct mips_perf_event *pev)
-{
-	struct hw_perf_event *hwc = &event->hw;
-
-	if (event->cpu >= 0) {
-		if (pev->range > V) {
-			/*
-			 * The user selected an event that is processor
-			 * wide, while expecting it to be VPE wide.
-			 */
-			hwc->config_base |= M_TC_EN_ALL;
-		} else {
-			/*
-			 * FIXME: cpu_data[event->cpu].vpe_id reports 0
-			 * for both CPUs.
-			 */
-			hwc->config_base |= M_PERFCTL_VPEID(event->cpu);
-			hwc->config_base |= M_TC_EN_VPE;
-		}
-	} else
-		hwc->config_base |= M_TC_EN_ALL;
-}
-#else
-static void check_and_calc_range(struct perf_event *event,
-				 const struct mips_perf_event *pev)
-{
-}
-#endif
-
 static int __hw_perf_event_init(struct perf_event *event)
 {
 	struct perf_event_attr *attr = &event->attr;
@@ -1331,10 +1325,6 @@ static int __hw_perf_event_init(struct perf_event *event)
 	 */
 	hwc->config_base = MIPS_PERFCTRL_IE;
 
-	/* Calculate range bits and validate it. */
-	if (num_possible_cpus() > 1)
-		check_and_calc_range(event, pev);
-
 	hwc->event_base = mipspmu_perf_event_encode(pev);
 	if (PERF_TYPE_RAW == event->attr.type)
 		mutex_unlock(&raw_event_mutex);
@@ -1723,7 +1713,6 @@ init_hw_perf_events(void)
 	}
 
 #ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
-	cpu_has_mipsmt_pertccounters = read_c0_config7() & (1<<19);
 	if (!cpu_has_mipsmt_pertccounters)
 		counters = counters_total_to_per_cpu(counters);
 #endif
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index b9e9bf628849..8d85046adcc8 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -180,7 +180,7 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
 	return 0;
 }
 
-#ifdef CONFIG_CC_STACKPROTECTOR
+#ifdef CONFIG_STACKPROTECTOR
 #include <linux/stackprotector.h>
 unsigned long __stack_chk_guard __read_mostly;
 EXPORT_SYMBOL(__stack_chk_guard);
@@ -721,6 +721,10 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
 	if (value & ~known_bits)
 		return -EOPNOTSUPP;
 
+	/* Setting FRE without FR is not supported.  */
+	if ((value & (PR_FP_MODE_FR | PR_FP_MODE_FRE)) == PR_FP_MODE_FRE)
+		return -EOPNOTSUPP;
+
 	/* Avoid inadvertently triggering emulation */
 	if ((value & PR_FP_MODE_FR) && raw_cpu_has_fpu &&
 	    !(raw_current_cpu_data.fpu_id & MIPS_FPIR_F64))
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 0b23b1ad99e6..9f6c3f2aa2e2 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -463,7 +463,7 @@ static int fpr_get_msa(struct task_struct *target,
 /*
  * Copy the floating-point context to the supplied NT_PRFPREG buffer.
  * Choose the appropriate helper for general registers, and then copy
- * the FCSR register separately.
+ * the FCSR and FIR registers separately.
  */
 static int fpr_get(struct task_struct *target,
 		   const struct user_regset *regset,
@@ -471,6 +471,7 @@ static int fpr_get(struct task_struct *target,
 		   void *kbuf, void __user *ubuf)
 {
 	const int fcr31_pos = NUM_FPU_REGS * sizeof(elf_fpreg_t);
+	const int fir_pos = fcr31_pos + sizeof(u32);
 	int err;
 
 	if (sizeof(target->thread.fpu.fpr[0]) == sizeof(elf_fpreg_t))
@@ -483,6 +484,12 @@ static int fpr_get(struct task_struct *target,
 	err = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
 				  &target->thread.fpu.fcr31,
 				  fcr31_pos, fcr31_pos + sizeof(u32));
+	if (err)
+		return err;
+
+	err = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+				  &boot_cpu_data.fpu_id,
+				  fir_pos, fir_pos + sizeof(u32));
 
 	return err;
 }
@@ -531,7 +538,8 @@ static int fpr_set_msa(struct task_struct *target,
 /*
  * Copy the supplied NT_PRFPREG buffer to the floating-point context.
  * Choose the appropriate helper for general registers, and then copy
- * the FCSR register separately.
+ * the FCSR register separately.  Ignore the incoming FIR register
+ * contents though, as the register is read-only.
  *
  * We optimize for the case where `count % sizeof(elf_fpreg_t) == 0',
  * which is supposed to have been guaranteed by the kernel before
@@ -545,6 +553,7 @@ static int fpr_set(struct task_struct *target,
 		   const void *kbuf, const void __user *ubuf)
 {
 	const int fcr31_pos = NUM_FPU_REGS * sizeof(elf_fpreg_t);
+	const int fir_pos = fcr31_pos + sizeof(u32);
 	u32 fcr31;
 	int err;
 
@@ -572,6 +581,11 @@ static int fpr_set(struct task_struct *target,
 		ptrace_setfcr31(target, fcr31);
 	}
 
+	if (count > 0)
+		err = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+						fir_pos,
+						fir_pos + sizeof(u32));
+
 	return err;
 }
 
@@ -793,18 +807,18 @@ long arch_ptrace(struct task_struct *child, long request,
 			fregs = get_fpu_regs(child);
 
 #ifdef CONFIG_32BIT
-			if (test_thread_flag(TIF_32BIT_FPREGS)) {
+			if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
 				/*
 				 * The odd registers are actually the high
 				 * order bits of the values stored in the even
-				 * registers - unless we're using r2k_switch.S.
+				 * registers.
 				 */
 				tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE],
 						addr & 1);
 				break;
 			}
 #endif
-			tmp = get_fpr32(&fregs[addr - FPR_BASE], 0);
+			tmp = get_fpr64(&fregs[addr - FPR_BASE], 0);
 			break;
 		case PC:
 			tmp = regs->cp0_epc;
@@ -888,11 +902,11 @@ long arch_ptrace(struct task_struct *child, long request,
 
 			init_fp_ctx(child);
 #ifdef CONFIG_32BIT
-			if (test_thread_flag(TIF_32BIT_FPREGS)) {
+			if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
 				/*
 				 * The odd registers are actually the high
 				 * order bits of the values stored in the even
-				 * registers - unless we're using r2k_switch.S.
+				 * registers.
 				 */
 				set_fpr32(&fregs[(addr & ~1) - FPR_BASE],
 					  addr & 1, data);
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 2b9260f92ccd..7edc629304c8 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -99,17 +99,17 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 				break;
 			}
 			fregs = get_fpu_regs(child);
-			if (test_thread_flag(TIF_32BIT_FPREGS)) {
+			if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
 				/*
 				 * The odd registers are actually the high
 				 * order bits of the values stored in the even
-				 * registers - unless we're using r2k_switch.S.
+				 * registers.
 				 */
 				tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE],
 						addr & 1);
 				break;
 			}
-			tmp = get_fpr32(&fregs[addr - FPR_BASE], 0);
+			tmp = get_fpr64(&fregs[addr - FPR_BASE], 0);
 			break;
 		case PC:
 			tmp = regs->cp0_epc;
@@ -212,11 +212,11 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 				       sizeof(child->thread.fpu));
 				child->thread.fpu.fcr31 = 0;
 			}
-			if (test_thread_flag(TIF_32BIT_FPREGS)) {
+			if (test_tsk_thread_flag(child, TIF_32BIT_FPREGS)) {
 				/*
 				 * The odd registers are actually the high
 				 * order bits of the values stored in the even
-				 * registers - unless we're using r2k_switch.S.
+				 * registers.
 				 */
 				set_fpr32(&fregs[(addr & ~1) - FPR_BASE],
 					  addr & 1, data);
diff --git a/arch/mips/kernel/r2300_switch.S b/arch/mips/kernel/r2300_switch.S
index 665897139f30..71b1aafae1bb 100644
--- a/arch/mips/kernel/r2300_switch.S
+++ b/arch/mips/kernel/r2300_switch.S
@@ -36,7 +36,7 @@ LEAF(resume)
 	cpu_save_nonscratch a0
 	sw	ra, THREAD_REG31(a0)
 
-#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP)
+#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)
 	PTR_LA	t8, __stack_chk_guard
 	LONG_L	t9, TASK_STACK_CANARY(a1)
 	LONG_S	t9, 0(t8)
diff --git a/arch/mips/kernel/r4k_switch.S b/arch/mips/kernel/r4k_switch.S
index 17cf9341c1cf..58232ae6cfae 100644
--- a/arch/mips/kernel/r4k_switch.S
+++ b/arch/mips/kernel/r4k_switch.S
@@ -31,7 +31,7 @@
 	cpu_save_nonscratch a0
 	LONG_S	ra, THREAD_REG31(a0)
 
-#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP)
+#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)
 	PTR_LA	t8, __stack_chk_guard
 	LONG_L	t9, TASK_STACK_CANARY(a1)
 	LONG_S	t9, 0(t8)
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index a9a7d78803cd..91d3c8c46097 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -590,3 +590,5 @@ EXPORT(sys_call_table)
 	PTR	sys_pkey_alloc
 	PTR	sys_pkey_free			/* 4365 */
 	PTR	sys_statx
+	PTR	sys_rseq
+	PTR	sys_io_pgetevents
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 65d5aeeb9bdb..358d9599983d 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -439,4 +439,6 @@ EXPORT(sys_call_table)
 	PTR	sys_pkey_alloc
 	PTR	sys_pkey_free			/* 5325 */
 	PTR	sys_statx
+	PTR	sys_rseq
+	PTR	sys_io_pgetevents
 	.size	sys_call_table,.-sys_call_table
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index cbf190ef9e8a..c65eaacc1abf 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -434,4 +434,6 @@ EXPORT(sysn32_call_table)
 	PTR	sys_pkey_alloc
 	PTR	sys_pkey_free
 	PTR	sys_statx			/* 6330 */
+	PTR	sys_rseq
+	PTR	compat_sys_io_pgetevents
 	.size	sysn32_call_table,.-sysn32_call_table
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 9ebe3e2403b1..73913f072e39 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -583,4 +583,6 @@ EXPORT(sys32_call_table)
 	PTR	sys_pkey_alloc
 	PTR	sys_pkey_free			/* 4365 */
 	PTR	sys_statx
+	PTR	sys_rseq
+	PTR	compat_sys_io_pgetevents
 	.size	sys32_call_table,.-sys32_call_table
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 563188ac6fa2..2c96c0c68116 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -93,7 +93,7 @@ void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
 	 * If the region reaches the top of the physical address space, adjust
 	 * the size slightly so that (start + size) doesn't overflow
 	 */
-	if (start + size - 1 == (phys_addr_t)ULLONG_MAX)
+	if (start + size - 1 == PHYS_ADDR_MAX)
 		--size;
 
 	/* Sanity check */
@@ -376,7 +376,7 @@ static void __init bootmem_init(void)
 	unsigned long reserved_end;
 	unsigned long mapstart = ~0UL;
 	unsigned long bootmap_size;
-	phys_addr_t ramstart = (phys_addr_t)ULLONG_MAX;
+	phys_addr_t ramstart = PHYS_ADDR_MAX;
 	bool bootmap_valid = false;
 	int i;
 
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 9e224469c788..0a9cfe7a0372 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -801,6 +801,8 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 		regs->regs[0] = 0;		/* Don't deal with this again.	*/
 	}
 
+	rseq_signal_deliver(ksig, regs);
+
 	if (sig_uses_siginfo(&ksig->ka, abi))
 		ret = abi->setup_rt_frame(vdso + abi->vdso->off_rt_sigreturn,
 					  ksig, regs, oldset);
@@ -868,6 +870,7 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused,
 	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
 		clear_thread_flag(TIF_NOTIFY_RESUME);
 		tracehook_notify_resume(regs);
+		rseq_handle_notify_resume(NULL, regs);
 	}
 
 	user_enter();
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index c4db910a8794..b5d9e1784aff 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -8,13 +8,13 @@
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  * Copyright (C) 2016, Imagination Technologies Ltd.
  */
+#include <linux/compat.h>
 #include <linux/compiler.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/signal.h>
 #include <linux/syscalls.h>
 
-#include <asm/compat.h>
 #include <asm/compat-signal.h>
 #include <linux/uaccess.h>
 #include <asm/unistd.h>
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index a6ebc8135112..bfe02ded25d1 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -34,21 +34,6 @@
 DEFINE_SPINLOCK(rtc_lock);
 EXPORT_SYMBOL(rtc_lock);
 
-int __weak rtc_mips_set_time(unsigned long sec)
-{
-	return -ENODEV;
-}
-
-int __weak rtc_mips_set_mmss(unsigned long nowtime)
-{
-	return rtc_mips_set_time(nowtime);
-}
-
-int update_persistent_clock(struct timespec now)
-{
-	return rtc_mips_set_mmss(now.tv_sec);
-}
-
 static int null_perf_irq(void)
 {
 	return 0;
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 967e9e4e795e..d67fa74622ee 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -699,17 +699,11 @@ static int simulate_sync(struct pt_regs *regs, unsigned int opcode)
 asmlinkage void do_ov(struct pt_regs *regs)
 {
 	enum ctx_state prev_state;
-	siginfo_t info;
-
-	clear_siginfo(&info);
-	info.si_signo = SIGFPE;
-	info.si_code = FPE_INTOVF;
-	info.si_addr = (void __user *)regs->cp0_epc;
 
 	prev_state = exception_enter();
 	die_if_kernel("Integer overflow", regs);
 
-	force_sig_info(SIGFPE, &info, current);
+	force_sig_fault(SIGFPE, FPE_INTOVF, (void __user *)regs->cp0_epc, current);
 	exception_exit(prev_state);
 }
 
@@ -722,32 +716,27 @@ asmlinkage void do_ov(struct pt_regs *regs)
 void force_fcr31_sig(unsigned long fcr31, void __user *fault_addr,
 		     struct task_struct *tsk)
 {
-	struct siginfo si;
-
-	clear_siginfo(&si);
-	si.si_addr = fault_addr;
-	si.si_signo = SIGFPE;
+	int si_code = FPE_FLTUNK;
 
 	if (fcr31 & FPU_CSR_INV_X)
-		si.si_code = FPE_FLTINV;
+		si_code = FPE_FLTINV;
 	else if (fcr31 & FPU_CSR_DIV_X)
-		si.si_code = FPE_FLTDIV;
+		si_code = FPE_FLTDIV;
 	else if (fcr31 & FPU_CSR_OVF_X)
-		si.si_code = FPE_FLTOVF;
+		si_code = FPE_FLTOVF;
 	else if (fcr31 & FPU_CSR_UDF_X)
-		si.si_code = FPE_FLTUND;
+		si_code = FPE_FLTUND;
 	else if (fcr31 & FPU_CSR_INE_X)
-		si.si_code = FPE_FLTRES;
+		si_code = FPE_FLTRES;
 
-	force_sig_info(SIGFPE, &si, tsk);
+	force_sig_fault(SIGFPE, si_code, fault_addr, tsk);
 }
 
 int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
 {
-	struct siginfo si;
+	int si_code;
 	struct vm_area_struct *vma;
 
-	clear_siginfo(&si);
 	switch (sig) {
 	case 0:
 		return 0;
@@ -757,23 +746,18 @@ int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
 		return 1;
 
 	case SIGBUS:
-		si.si_addr = fault_addr;
-		si.si_signo = sig;
-		si.si_code = BUS_ADRERR;
-		force_sig_info(sig, &si, current);
+		force_sig_fault(SIGBUS, BUS_ADRERR, fault_addr, current);
 		return 1;
 
 	case SIGSEGV:
-		si.si_addr = fault_addr;
-		si.si_signo = sig;
 		down_read(&current->mm->mmap_sem);
 		vma = find_vma(current->mm, (unsigned long)fault_addr);
 		if (vma && (vma->vm_start <= (unsigned long)fault_addr))
-			si.si_code = SEGV_ACCERR;
+			si_code = SEGV_ACCERR;
 		else
-			si.si_code = SEGV_MAPERR;
+			si_code = SEGV_MAPERR;
 		up_read(&current->mm->mmap_sem);
-		force_sig_info(sig, &si, current);
+		force_sig_fault(SIGSEGV, si_code, fault_addr, current);
 		return 1;
 
 	default:
@@ -896,10 +880,8 @@ out:
 void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
 	const char *str)
 {
-	siginfo_t info;
 	char b[40];
 
-	clear_siginfo(&info);
 #ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
 	if (kgdb_ll_trap(DIE_TRAP, str, regs, code, current->thread.trap_nr,
 			 SIGTRAP) == NOTIFY_STOP)
@@ -921,13 +903,9 @@ void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
 	case BRK_DIVZERO:
 		scnprintf(b, sizeof(b), "%s instruction in kernel code", str);
 		die_if_kernel(b, regs);
-		if (code == BRK_DIVZERO)
-			info.si_code = FPE_INTDIV;
-		else
-			info.si_code = FPE_INTOVF;
-		info.si_signo = SIGFPE;
-		info.si_addr = (void __user *) regs->cp0_epc;
-		force_sig_info(SIGFPE, &info, current);
+		force_sig_fault(SIGFPE,
+				code == BRK_DIVZERO ? FPE_INTDIV : FPE_INTOVF,
+				(void __user *) regs->cp0_epc, current);
 		break;
 	case BRK_BUG:
 		die_if_kernel("Kernel bug detected", regs);
@@ -952,9 +930,7 @@ void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
 		scnprintf(b, sizeof(b), "%s instruction in kernel code", str);
 		die_if_kernel(b, regs);
 		if (si_code) {
-			info.si_signo = SIGTRAP;
-			info.si_code = si_code;
-			force_sig_info(SIGTRAP, &info, current);
+			force_sig_fault(SIGTRAP, si_code, NULL,	current);
 		} else {
 			force_sig(SIGTRAP, current);
 		}
@@ -1506,13 +1482,8 @@ asmlinkage void do_mdmx(struct pt_regs *regs)
  */
 asmlinkage void do_watch(struct pt_regs *regs)
 {
-	siginfo_t info;
 	enum ctx_state prev_state;
 
-	clear_siginfo(&info);
-	info.si_signo = SIGTRAP;
-	info.si_code = TRAP_HWBKPT;
-
 	prev_state = exception_enter();
 	/*
 	 * Clear WP (bit 22) bit of cause register so we don't loop
@@ -1528,7 +1499,7 @@ asmlinkage void do_watch(struct pt_regs *regs)
 	if (test_tsk_thread_flag(current, TIF_LOAD_WATCH)) {
 		mips_read_watch_registers();
 		local_irq_enable();
-		force_sig_info(SIGTRAP, &info, current);
+		force_sig_fault(SIGTRAP, TRAP_HWBKPT, NULL, current);
 	} else {
 		mips_clear_watch_registers();
 		local_irq_enable();
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 544ea21bfef9..0bef238d2c0c 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -872,7 +872,7 @@ static ssize_t vpe_write(struct file *file, const char __user *buffer,
 		return -ENODEV;
 
 	if ((count + v->len) > v->plen) {
-		pr_warn("VPE loader: elf size too big. Perhaps strip uneeded symbols\n");
+		pr_warn("VPE loader: elf size too big. Perhaps strip unneeded symbols\n");
 		return -ENOMEM;
 	}