diff options
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 3 | ||||
| -rw-r--r-- | arch/mips/kernel/linux32.c | 22 | ||||
| -rw-r--r-- | arch/mips/kernel/perf_event_mipsxx.c | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/pm-cps.c | 31 | ||||
| -rw-r--r-- | arch/mips/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/reset.c | 68 | ||||
| -rw-r--r-- | arch/mips/kernel/setup.c | 5 | ||||
| -rw-r--r-- | arch/mips/kernel/smp-bmips.c | 8 | ||||
| -rw-r--r-- | arch/mips/kernel/syscall.c | 6 | ||||
| -rw-r--r-- | arch/mips/kernel/traps.c | 4 |
10 files changed, 123 insertions, 28 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index cf3fd54..6b07b73 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -848,6 +848,9 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c) if (config5 & MIPS_CONF5_CA2) c->ases |= MIPS_ASE_MIPS16E2; + if (config5 & MIPS_CONF5_CRCP) + elf_hwcap |= HWCAP_MIPS_CRC32; + return config5 & MIPS_CONF_M; } diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index b332f6f..318f1c0 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -67,8 +67,8 @@ SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len, { if (pgoff & (~PAGE_MASK >> 12)) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, - pgoff >> (PAGE_SHIFT-12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT-12)); } #define RLIM_INFINITY32 0x7fffffff @@ -82,13 +82,13 @@ struct rlimit32 { SYSCALL_DEFINE4(32_truncate64, const char __user *, path, unsigned long, __dummy, unsigned long, a2, unsigned long, a3) { - return sys_truncate(path, merge_64(a2, a3)); + return ksys_truncate(path, merge_64(a2, a3)); } SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy, unsigned long, a2, unsigned long, a3) { - return sys_ftruncate(fd, merge_64(a2, a3)); + return ksys_ftruncate(fd, merge_64(a2, a3)); } SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high, @@ -105,13 +105,13 @@ SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high, SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count, unsigned long, unused, unsigned long, a4, unsigned long, a5) { - return sys_pread64(fd, buf, count, merge_64(a4, a5)); + return ksys_pread64(fd, buf, count, merge_64(a4, a5)); } SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, size_t, count, u32, unused, u64, a4, u64, a5) { - return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); + return ksys_pwrite64(fd, buf, count, merge_64(a4, a5)); } SYSCALL_DEFINE1(32_personality, unsigned long, personality) @@ -131,7 +131,7 @@ SYSCALL_DEFINE1(32_personality, unsigned long, personality) asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, size_t count) { - return sys_readahead(fd, merge_64(a2, a3), count); + return ksys_readahead(fd, merge_64(a2, a3), count); } asmlinkage long sys32_sync_file_range(int fd, int __pad, @@ -139,7 +139,7 @@ asmlinkage long sys32_sync_file_range(int fd, int __pad, unsigned long a4, unsigned long a5, int flags) { - return sys_sync_file_range(fd, + return ksys_sync_file_range(fd, merge_64(a2, a3), merge_64(a4, a5), flags); } @@ -149,7 +149,7 @@ asmlinkage long sys32_fadvise64_64(int fd, int __pad, unsigned long a4, unsigned long a5, int flags) { - return sys_fadvise64_64(fd, + return ksys_fadvise64_64(fd, merge_64(a2, a3), merge_64(a4, a5), flags); } @@ -157,6 +157,6 @@ asmlinkage long sys32_fadvise64_64(int fd, int __pad, asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, unsigned offset_a3, unsigned len_a4, unsigned len_a5) { - return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3), - merge_64(len_a4, len_a5)); + return ksys_fallocate(fd, mode, merge_64(offset_a2, offset_a3), + merge_64(len_a4, len_a5)); } diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c index 6668f67..ee73550 100644 --- a/arch/mips/kernel/perf_event_mipsxx.c +++ b/arch/mips/kernel/perf_event_mipsxx.c @@ -711,7 +711,7 @@ static int validate_group(struct perf_event *event) if (mipsxx_pmu_alloc_counter(&fake_cpuc, &leader->hw) < 0) return -EINVAL; - list_for_each_entry(sibling, &leader->sibling_list, group_entry) { + for_each_sibling_event(sibling, leader) { if (mipsxx_pmu_alloc_counter(&fake_cpuc, &sibling->hw) < 0) return -EINVAL; } diff --git a/arch/mips/kernel/pm-cps.c b/arch/mips/kernel/pm-cps.c index 421e06d..55c3fbe 100644 --- a/arch/mips/kernel/pm-cps.c +++ b/arch/mips/kernel/pm-cps.c @@ -12,6 +12,7 @@ #include <linux/init.h> #include <linux/percpu.h> #include <linux/slab.h> +#include <linux/suspend.h> #include <asm/asm-offsets.h> #include <asm/cacheflush.h> @@ -670,6 +671,34 @@ static int cps_pm_online_cpu(unsigned int cpu) return 0; } +static int cps_pm_power_notifier(struct notifier_block *this, + unsigned long event, void *ptr) +{ + unsigned int stat; + + switch (event) { + case PM_SUSPEND_PREPARE: + stat = read_cpc_cl_stat_conf(); + /* + * If we're attempting to suspend the system and power down all + * of the cores, the JTAG detect bit indicates that the CPC will + * instead put the cores into clock-off state. In this state + * a connected debugger can cause the CPU to attempt + * interactions with the powered down system. At best this will + * fail. At worst, it can hang the NoC, requiring a hard reset. + * To avoid this, just block system suspend if a JTAG probe + * is detected. + */ + if (stat & CPC_Cx_STAT_CONF_EJTAG_PROBE) { + pr_warn("JTAG probe is connected - abort suspend\n"); + return NOTIFY_BAD; + } + return NOTIFY_DONE; + default: + return NOTIFY_DONE; + } +} + static int __init cps_pm_init(void) { /* A CM is required for all non-coherent states */ @@ -705,6 +734,8 @@ static int __init cps_pm_init(void) pr_warn("pm-cps: no CPC, clock & power gating unavailable\n"); } + pm_notifier(cps_pm_power_notifier, 0); + return cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "mips/cps_pm:online", cps_pm_online_cpu, NULL); } diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index 57028d4..b9e9bf6 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -781,6 +781,8 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value) atomic_set(&task->mm->context.fp_mode_switching, 0); preempt_enable(); + wake_up_var(&task->mm->context.fp_mode_switching); + return 0; } diff --git a/arch/mips/kernel/reset.c b/arch/mips/kernel/reset.c index 7c746d3..6288780 100644 --- a/arch/mips/kernel/reset.c +++ b/arch/mips/kernel/reset.c @@ -13,6 +13,9 @@ #include <linux/reboot.h> #include <linux/delay.h> +#include <asm/compiler.h> +#include <asm/idle.h> +#include <asm/mipsregs.h> #include <asm/reboot.h> /* @@ -26,6 +29,62 @@ void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); +static void machine_hang(void) +{ + /* + * We're hanging the system so we don't want to be interrupted anymore. + * Any interrupt handlers that ran would at best be useless & at worst + * go awry because the system isn't in a functional state. + */ + local_irq_disable(); + + /* + * Mask all interrupts, giving us a better chance of remaining in the + * low power wait state. + */ + clear_c0_status(ST0_IM); + + while (true) { + if (cpu_has_mips_r) { + /* + * We know that the wait instruction is supported so + * make use of it directly, leaving interrupts + * disabled. + */ + asm volatile( + ".set push\n\t" + ".set " MIPS_ISA_ARCH_LEVEL "\n\t" + "wait\n\t" + ".set pop"); + } else if (cpu_wait) { + /* + * Try the cpu_wait() callback. This isn't ideal since + * it'll re-enable interrupts, but that ought to be + * harmless given that they're all masked. + */ + cpu_wait(); + local_irq_disable(); + } else { + /* + * We're going to burn some power running round the + * loop, but we don't really have a choice. This isn't + * a path we should expect to run for long during + * typical use anyway. + */ + } + + /* + * In most modern MIPS CPUs interrupts will cause the wait + * instruction to graduate even when disabled, and in some + * cases even when masked. In order to prevent a timer + * interrupt from continuously taking us out of the low power + * wait state, we clear any pending timer interrupt here. + */ + if (cpu_has_counter) + write_c0_compare(0); + } +} + void machine_restart(char *command) { if (_machine_restart) @@ -38,8 +97,7 @@ void machine_restart(char *command) do_kernel_restart(command); mdelay(1000); pr_emerg("Reboot failed -- System halted\n"); - local_irq_disable(); - while (1); + machine_hang(); } void machine_halt(void) @@ -51,8 +109,7 @@ void machine_halt(void) preempt_disable(); smp_send_stop(); #endif - local_irq_disable(); - while (1); + machine_hang(); } void machine_power_off(void) @@ -64,6 +121,5 @@ void machine_power_off(void) preempt_disable(); smp_send_stop(); #endif - local_irq_disable(); - while (1); + machine_hang(); } diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 5f8b0a9..563188a 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -155,7 +155,8 @@ void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_add add_memory_region(start, size, BOOT_MEM_RAM); } -bool __init memory_region_available(phys_addr_t start, phys_addr_t size) +static bool __init __maybe_unused memory_region_available(phys_addr_t start, + phys_addr_t size) { int i; bool in_ram = false, free = true; @@ -453,7 +454,7 @@ static void __init bootmem_init(void) pr_info("Wasting %lu bytes for tracking %lu unused pages\n", (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), min_low_pfn - ARCH_PFN_OFFSET); - } else if (min_low_pfn < ARCH_PFN_OFFSET) { + } else if (ARCH_PFN_OFFSET - min_low_pfn > 0UL) { pr_info("%lu free pages won't be used\n", ARCH_PFN_OFFSET - min_low_pfn); } diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c index 9d41732..159e83a 100644 --- a/arch/mips/kernel/smp-bmips.c +++ b/arch/mips/kernel/smp-bmips.c @@ -168,11 +168,11 @@ static void bmips_prepare_cpus(unsigned int max_cpus) return; } - if (request_irq(IPI0_IRQ, bmips_ipi_interrupt, IRQF_PERCPU, - "smp_ipi0", NULL)) + if (request_irq(IPI0_IRQ, bmips_ipi_interrupt, + IRQF_PERCPU | IRQF_NO_SUSPEND, "smp_ipi0", NULL)) panic("Can't request IPI0 interrupt"); - if (request_irq(IPI1_IRQ, bmips_ipi_interrupt, IRQF_PERCPU, - "smp_ipi1", NULL)) + if (request_irq(IPI1_IRQ, bmips_ipi_interrupt, + IRQF_PERCPU | IRQF_NO_SUSPEND, "smp_ipi1", NULL)) panic("Can't request IPI1 interrupt"); } diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c index 58c6f63..69c17b5 100644 --- a/arch/mips/kernel/syscall.c +++ b/arch/mips/kernel/syscall.c @@ -63,7 +63,8 @@ SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len, { if (offset & ~PAGE_MASK) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + offset >> PAGE_SHIFT); } SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len, @@ -73,7 +74,8 @@ SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len, if (pgoff & (~PAGE_MASK >> 12)) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); } save_static_function(sys_fork); diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 0ae4a73..967e9e4 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1248,8 +1248,8 @@ static int enable_restore_fp_context(int msa) * If an FP mode switch is currently underway, wait for it to * complete before proceeding. */ - wait_on_atomic_t(¤t->mm->context.fp_mode_switching, - atomic_t_wait, TASK_KILLABLE); + wait_var_event(¤t->mm->context.fp_mode_switching, + !atomic_read(¤t->mm->context.fp_mode_switching)); if (!used_math()) { /* First time FP context user. */ |
