diff options
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/Makefile | 4 | ||||
| -rw-r--r-- | arch/um/kernel/irq.c | 3 | ||||
| -rw-r--r-- | arch/um/kernel/kmsg_dump.c | 43 | ||||
| -rw-r--r-- | arch/um/kernel/mem.c | 66 | ||||
| -rw-r--r-- | arch/um/kernel/physmem.c | 41 | ||||
| -rw-r--r-- | arch/um/kernel/process.c | 11 | ||||
| -rw-r--r-- | arch/um/kernel/ptrace.c | 32 | ||||
| -rw-r--r-- | arch/um/kernel/reboot.c | 35 | ||||
| -rw-r--r-- | arch/um/kernel/skas/mmu.c | 68 | ||||
| -rw-r--r-- | arch/um/kernel/skas/process.c | 31 | ||||
| -rw-r--r-- | arch/um/kernel/smp.c | 238 | ||||
| -rw-r--r-- | arch/um/kernel/sysrq.c | 6 | ||||
| -rw-r--r-- | arch/um/kernel/trap.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/um_arch.c | 67 |
14 files changed, 132 insertions, 515 deletions
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile index 2d840a070c8b..a6a5e42caaef 100644 --- a/arch/um/kernel/Makefile +++ b/arch/um/kernel/Makefile @@ -12,8 +12,8 @@ clean-files := obj-y = config.o exec.o exitcode.o irq.o ksyms.o mem.o \ physmem.o process.o ptrace.o reboot.o sigio.o \ - signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o \ - um_arch.o umid.o maccess.o skas/ + signal.o syscall.o sysrq.o time.o tlb.o trap.o \ + um_arch.o umid.o maccess.o kmsg_dump.o skas/ obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o obj-$(CONFIG_GPROF) += gprof_syms.o diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 1d8505b1e290..23cb9350d47e 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -35,9 +35,6 @@ void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) struct irq_fd *irq_fd; int n; - if (smp_sigio_handler()) - return; - while (1) { n = os_waiting_for_events(active_fds); if (n <= 0) { diff --git a/arch/um/kernel/kmsg_dump.c b/arch/um/kernel/kmsg_dump.c new file mode 100644 index 000000000000..407d49251d6f --- /dev/null +++ b/arch/um/kernel/kmsg_dump.c @@ -0,0 +1,43 @@ +#include <linux/kmsg_dump.h> +#include <linux/console.h> +#include <shared/init.h> +#include <shared/kern.h> +#include <os.h> + +static void kmsg_dumper_stdout(struct kmsg_dumper *dumper, + enum kmsg_dump_reason reason) +{ + static char line[1024]; + + size_t len = 0; + bool con_available = false; + + /* only dump kmsg when no console is available */ + if (!console_trylock()) + return; + + if (console_drivers != NULL) + con_available = true; + + console_unlock(); + + if (con_available == true) + return; + + printf("kmsg_dump:\n"); + while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len)) { + line[len] = '\0'; + printf("%s", line); + } +} + +static struct kmsg_dumper kmsg_dumper = { + .dump = kmsg_dumper_stdout +}; + +int __init kmsg_dumper_stdout_init(void) +{ + return kmsg_dump_register(&kmsg_dumper); +} + +__uml_postsetup(kmsg_dumper_stdout_init); diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 8636e905426f..b2a2dff50b4e 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -38,19 +38,6 @@ int kmalloc_ok = 0; /* Used during early boot */ static unsigned long brk_end; -#ifdef CONFIG_HIGHMEM -static void setup_highmem(unsigned long highmem_start, - unsigned long highmem_len) -{ - unsigned long highmem_pfn; - int i; - - highmem_pfn = __pa(highmem_start) >> PAGE_SHIFT; - for (i = 0; i < highmem_len >> PAGE_SHIFT; i++) - free_highmem_page(&mem_map[highmem_pfn + i]); -} -#endif - void __init mem_init(void) { /* clear the zero-page */ @@ -67,9 +54,6 @@ void __init mem_init(void) /* this will put all low memory onto the freelists */ free_all_bootmem(); max_low_pfn = totalram_pages; -#ifdef CONFIG_HIGHMEM - setup_highmem(end_iomem, highmem); -#endif max_pfn = totalram_pages; mem_init_print_info(NULL); kmalloc_ok = 1; @@ -127,49 +111,6 @@ static void __init fixrange_init(unsigned long start, unsigned long end, } } -#ifdef CONFIG_HIGHMEM -pte_t *kmap_pte; -pgprot_t kmap_prot; - -#define kmap_get_fixmap_pte(vaddr) \ - pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)),\ - (vaddr)), (vaddr)) - -static void __init kmap_init(void) -{ - unsigned long kmap_vstart; - - /* cache the first kmap pte */ - kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN); - kmap_pte = kmap_get_fixmap_pte(kmap_vstart); - - kmap_prot = PAGE_KERNEL; -} - -static void __init init_highmem(void) -{ - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - unsigned long vaddr; - - /* - * Permanent kmaps: - */ - vaddr = PKMAP_BASE; - fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, swapper_pg_dir); - - pgd = swapper_pg_dir + pgd_index(vaddr); - pud = pud_offset(pgd, vaddr); - pmd = pmd_offset(pud, vaddr); - pte = pte_offset_kernel(pmd, vaddr); - pkmap_page_table = pte; - - kmap_init(); -} -#endif /* CONFIG_HIGHMEM */ - static void __init fixaddr_user_init( void) { #ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA @@ -211,9 +152,6 @@ void __init paging_init(void) zones_size[ZONE_NORMAL] = (end_iomem >> PAGE_SHIFT) - (uml_physmem >> PAGE_SHIFT); -#ifdef CONFIG_HIGHMEM - zones_size[ZONE_HIGHMEM] = highmem >> PAGE_SHIFT; -#endif free_area_init(zones_size); /* @@ -224,10 +162,6 @@ void __init paging_init(void) fixrange_init(vaddr, FIXADDR_TOP, swapper_pg_dir); fixaddr_user_init(); - -#ifdef CONFIG_HIGHMEM - init_highmem(); -#endif } /* diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index 549ecf3f5857..9034fc8056b4 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -57,22 +57,51 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len, extern int __syscall_stub_start; +/** + * setup_physmem() - Setup physical memory for UML + * @start: Start address of the physical kernel memory, + * i.e start address of the executable image. + * @reserve_end: end address of the physical kernel memory. + * @len: Length of total physical memory that should be mapped/made + * available, in bytes. + * @highmem: Number of highmem bytes that should be mapped/made available. + * + * Creates an unlinked temporary file of size (len + highmem) and memory maps + * it on the last executable image address (uml_reserved). + * + * The offset is needed as the length of the total physical memory + * (len + highmem) includes the size of the memory used be the executable image, + * but the mapped-to address is the last address of the executable image + * (uml_reserved == end address of executable image). + * + * The memory mapped memory of the temporary file is used as backing memory + * of all user space processes/kernel tasks. + */ void __init setup_physmem(unsigned long start, unsigned long reserve_end, unsigned long len, unsigned long long highmem) { unsigned long reserve = reserve_end - start; - int pfn = PFN_UP(__pa(reserve_end)); - int delta = (len - reserve) >> PAGE_SHIFT; - int err, offset, bootmap_size; + unsigned long pfn = PFN_UP(__pa(reserve_end)); + unsigned long delta = (len - reserve) >> PAGE_SHIFT; + unsigned long offset, bootmap_size; + long map_size; + int err; + + offset = uml_reserved - uml_physmem; + map_size = len - offset; + if(map_size <= 0) { + printf("Too few physical memory! Needed=%d, given=%d\n", + offset, len); + exit(1); + } physmem_fd = create_mem_file(len + highmem); - offset = uml_reserved - uml_physmem; err = os_map_memory((void *) uml_reserved, physmem_fd, offset, - len - offset, 1, 1, 1); + map_size, 1, 1, 1); if (err < 0) { printf("setup_physmem - mapping %ld bytes of memory at 0x%p " - "failed - errno = %d\n", len - offset, + "failed - errno = %d\n", map_size, (void *) uml_reserved, err); exit(1); } diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index f17bca8ed2ce..68b9119841cd 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -259,17 +259,6 @@ int strlen_user_proc(char __user *str) return strlen_user(str); } -int smp_sigio_handler(void) -{ -#ifdef CONFIG_SMP - int cpu = current_thread_info()->cpu; - IPI_handler(cpu); - if (cpu != 0) - return 1; -#endif - return 0; -} - int cpu(void) { return current_thread_info()->cpu; diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index 62435ef003d9..174ee5017264 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -8,9 +8,6 @@ #include <linux/sched.h> #include <linux/tracehook.h> #include <asm/uaccess.h> -#include <skas_ptrace.h> - - void user_enable_single_step(struct task_struct *child) { @@ -104,35 +101,6 @@ long arch_ptrace(struct task_struct *child, long request, ret = ptrace_set_thread_area(child, addr, vp); break; - case PTRACE_FAULTINFO: { - /* - * Take the info from thread->arch->faultinfo, - * but transfer max. sizeof(struct ptrace_faultinfo). - * On i386, ptrace_faultinfo is smaller! - */ - ret = copy_to_user(p, &child->thread.arch.faultinfo, - sizeof(struct ptrace_faultinfo)) ? - -EIO : 0; - break; - } - -#ifdef PTRACE_LDT - case PTRACE_LDT: { - struct ptrace_ldt ldt; - - if (copy_from_user(&ldt, p, sizeof(ldt))) { - ret = -EIO; - break; - } - - /* - * This one is confusing, so just punt and return -EIO for - * now - */ - ret = -EIO; - break; - } -#endif default: ret = ptrace_request(child, request, addr, data); if (ret == -EIO) diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c index ced8903921ae..9bdf67a092a5 100644 --- a/arch/um/kernel/reboot.c +++ b/arch/um/kernel/reboot.c @@ -15,28 +15,21 @@ void (*pm_power_off)(void); static void kill_off_processes(void) { - if (proc_mm) - /* - * FIXME: need to loop over userspace_pids - */ - os_kill_ptraced_process(userspace_pid[0], 1); - else { - struct task_struct *p; - int pid; - - read_lock(&tasklist_lock); - for_each_process(p) { - struct task_struct *t; - - t = find_lock_task_mm(p); - if (!t) - continue; - pid = t->mm->context.id.u.pid; - task_unlock(t); - os_kill_ptraced_process(pid, 1); - } - read_unlock(&tasklist_lock); + struct task_struct *p; + int pid; + + read_lock(&tasklist_lock); + for_each_process(p) { + struct task_struct *t; + + t = find_lock_task_mm(p); + if (!t) + continue; + pid = t->mm->context.id.u.pid; + task_unlock(t); + os_kill_ptraced_process(pid, 1); } + read_unlock(&tasklist_lock); } void uml_cleanup(void) diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index 007d5503f49b..94abdcc1d6ad 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -54,35 +54,22 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm) unsigned long stack = 0; int ret = -ENOMEM; - if (skas_needs_stub) { - stack = get_zeroed_page(GFP_KERNEL); - if (stack == 0) - goto out; - } + stack = get_zeroed_page(GFP_KERNEL); + if (stack == 0) + goto out; to_mm->id.stack = stack; if (current->mm != NULL && current->mm != &init_mm) from_mm = ¤t->mm->context; - if (proc_mm) { - ret = new_mm(stack); - if (ret < 0) { - printk(KERN_ERR "init_new_context_skas - " - "new_mm failed, errno = %d\n", ret); - goto out_free; - } - to_mm->id.u.mm_fd = ret; - } - else { - if (from_mm) - to_mm->id.u.pid = copy_context_skas0(stack, - from_mm->id.u.pid); - else to_mm->id.u.pid = start_userspace(stack); - - if (to_mm->id.u.pid < 0) { - ret = to_mm->id.u.pid; - goto out_free; - } + if (from_mm) + to_mm->id.u.pid = copy_context_skas0(stack, + from_mm->id.u.pid); + else to_mm->id.u.pid = start_userspace(stack); + + if (to_mm->id.u.pid < 0) { + ret = to_mm->id.u.pid; + goto out_free; } ret = init_new_ldt(to_mm, from_mm); @@ -105,9 +92,6 @@ void uml_setup_stubs(struct mm_struct *mm) { int err, ret; - if (!skas_needs_stub) - return; - ret = init_stub_pte(mm, STUB_CODE, (unsigned long) &__syscall_stub_start); if (ret) @@ -154,25 +138,19 @@ void destroy_context(struct mm_struct *mm) { struct mm_context *mmu = &mm->context; - if (proc_mm) - os_close_file(mmu->id.u.mm_fd); - else { - /* - * If init_new_context wasn't called, this will be - * zero, resulting in a kill(0), which will result in the - * whole UML suddenly dying. Also, cover negative and - * 1 cases, since they shouldn't happen either. - */ - if (mmu->id.u.pid < 2) { - printk(KERN_ERR "corrupt mm_context - pid = %d\n", - mmu->id.u.pid); - return; - } - os_kill_ptraced_process(mmu->id.u.pid, 1); + /* + * If init_new_context wasn't called, this will be + * zero, resulting in a kill(0), which will result in the + * whole UML suddenly dying. Also, cover negative and + * 1 cases, since they shouldn't happen either. + */ + if (mmu->id.u.pid < 2) { + printk(KERN_ERR "corrupt mm_context - pid = %d\n", + mmu->id.u.pid); + return; } + os_kill_ptraced_process(mmu->id.u.pid, 1); - if (skas_needs_stub) - free_page(mmu->id.stack); - + free_page(mmu->id.stack); free_ldt(mmu); } diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c index 4da11b3c8ddb..527fa5881915 100644 --- a/arch/um/kernel/skas/process.c +++ b/arch/um/kernel/skas/process.c @@ -10,25 +10,6 @@ #include <os.h> #include <skas.h> -int new_mm(unsigned long stack) -{ - int fd, err; - - fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0); - if (fd < 0) - return fd; - - if (skas_needs_stub) { - err = map_stub_pages(fd, STUB_CODE, STUB_DATA, stack); - if (err) { - os_close_file(fd); - return err; - } - } - - return fd; -} - extern void start_kernel(void); static int __init start_kernel_proc(void *unused) @@ -40,9 +21,7 @@ static int __init start_kernel_proc(void *unused) cpu_tasks[0].pid = pid; cpu_tasks[0].task = current; -#ifdef CONFIG_SMP - init_cpu_online(get_cpu_mask(0)); -#endif + start_kernel(); return 0; } @@ -55,14 +34,6 @@ int __init start_uml(void) { stack_protections((unsigned long) &cpu0_irqstack); set_sigstack(cpu0_irqstack, THREAD_SIZE); - if (proc_mm) { - userspace_pid[0] = start_userspace(0); - if (userspace_pid[0] < 0) { - printf("start_uml - start_userspace returned %d\n", - userspace_pid[0]); - exit(1); - } - } init_new_thread_signals(); diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c deleted file mode 100644 index 5c8c3ea7db7b..000000000000 --- a/arch/um/kernel/smp.c +++ /dev/null @@ -1,238 +0,0 @@ -/* - * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) - * Licensed under the GPL - */ - -#include <linux/percpu.h> -#include <asm/pgalloc.h> -#include <asm/tlb.h> - -#ifdef CONFIG_SMP - -#include <linux/sched.h> -#include <linux/module.h> -#include <linux/threads.h> -#include <linux/interrupt.h> -#include <linux/err.h> -#include <linux/hardirq.h> -#include <asm/smp.h> -#include <asm/processor.h> -#include <asm/spinlock.h> -#include <kern.h> -#include <irq_user.h> -#include <os.h> - -/* Per CPU bogomips and other parameters - * The only piece used here is the ipi pipe, which is set before SMP is - * started and never changed. - */ -struct cpuinfo_um cpu_data[NR_CPUS]; - -/* A statistic, can be a little off */ -int num_reschedules_sent = 0; - -/* Not changed after boot */ -struct task_struct *idle_threads[NR_CPUS]; - -void smp_send_reschedule(int cpu) -{ - os_write_file(cpu_data[cpu].ipi_pipe[1], "R", 1); - num_reschedules_sent++; -} - -void smp_send_stop(void) -{ - int i; - - printk(KERN_INFO "Stopping all CPUs..."); - for (i = 0; i < num_online_cpus(); i++) { - if (i == current_thread->cpu) - continue; - os_write_file(cpu_data[i].ipi_pipe[1], "S", 1); - } - printk(KERN_CONT "done\n"); -} - -static cpumask_t smp_commenced_mask = CPU_MASK_NONE; -static cpumask_t cpu_callin_map = CPU_MASK_NONE; - -static int idle_proc(void *cpup) -{ - int cpu = (int) cpup, err; - - err = os_pipe(cpu_data[cpu].ipi_pipe, 1, 1); - if (err < 0) - panic("CPU#%d failed to create IPI pipe, err = %d", cpu, -err); - - os_set_fd_async(cpu_data[cpu].ipi_pipe[0]); - - wmb(); - if (cpu_test_and_set(cpu, cpu_callin_map)) { - printk(KERN_ERR "huh, CPU#%d already present??\n", cpu); - BUG(); - } - - while (!cpu_isset(cpu, smp_commenced_mask)) - cpu_relax(); - - notify_cpu_starting(cpu); - set_cpu_online(cpu, true); - default_idle(); - return 0; -} - -static struct task_struct *idle_thread(int cpu) -{ - struct task_struct *new_task; - - current->thread.request.u.thread.proc = idle_proc; - current->thread.request.u.thread.arg = (void *) cpu; - new_task = fork_idle(cpu); - if (IS_ERR(new_task)) - panic("copy_process failed in idle_thread, error = %ld", - PTR_ERR(new_task)); - - cpu_tasks[cpu] = ((struct cpu_task) - { .pid = new_task->thread.mode.tt.extern_pid, - .task = new_task } ); - idle_threads[cpu] = new_task; - panic("skas mode doesn't support SMP"); - return new_task; -} - -void smp_prepare_cpus(unsigned int maxcpus) -{ - struct task_struct *idle; - unsigned long waittime; - int err, cpu, me = smp_processor_id(); - int i; - - for (i = 0; i < ncpus; ++i) - set_cpu_possible(i, true); - - set_cpu_online(me, true); - cpu_set(me, cpu_callin_map); - - err = os_pipe(cpu_data[me].ipi_pipe, 1, 1); - if (err < 0) - panic("CPU#0 failed to create IPI pipe, errno = %d", -err); - - os_set_fd_async(cpu_data[me].ipi_pipe[0]); - - for (cpu = 1; cpu < ncpus; cpu++) { - printk(KERN_INFO "Booting processor %d...\n", cpu); - - idle = idle_thread(cpu); - - init_idle(idle, cpu); - - waittime = 200000000; - while (waittime-- && !cpu_isset(cpu, cpu_callin_map)) - cpu_relax(); - - printk(KERN_INFO "%s\n", - cpu_isset(cpu, cpu_calling_map) ? "done" : "failed"); - } -} - -void smp_prepare_boot_cpu(void) -{ - set_cpu_online(smp_processor_id(), true); -} - -int __cpu_up(unsigned int cpu, struct task_struct *tidle) -{ - cpu_set(cpu, smp_commenced_mask); - while (!cpu_online(cpu)) - mb(); - return 0; -} - -int setup_profiling_timer(unsigned int multiplier) -{ - printk(KERN_INFO "setup_profiling_timer\n"); - return 0; -} - -void smp_call_function_slave(int cpu); - -void IPI_handler(int cpu) -{ - unsigned char c; - int fd; - - fd = cpu_data[cpu].ipi_pipe[0]; - while (os_read_file(fd, &c, 1) == 1) { - switch (c) { - case 'C': - smp_call_function_slave(cpu); - break; - - case 'R': - scheduler_ipi(); - break; - - case 'S': - printk(KERN_INFO "CPU#%d stopping\n", cpu); - while (1) - pause(); - break; - - default: - printk(KERN_ERR "CPU#%d received unknown IPI [%c]!\n", - cpu, c); - break; - } - } -} - -int hard_smp_processor_id(void) -{ - return pid_to_processor_id(os_getpid()); -} - -static DEFINE_SPINLOCK(call_lock); -static atomic_t scf_started; -static atomic_t scf_finished; -static void (*func)(void *info); -static void *info; - -void smp_call_function_slave(int cpu) -{ - atomic_inc(&scf_started); - (*func)(info); - atomic_inc(&scf_finished); -} - -int smp_call_function(void (*_func)(void *info), void *_info, int wait) -{ - int cpus = num_online_cpus() - 1; - int i; - - if (!cpus) - return 0; - - /* Can deadlock when called with interrupts disabled */ - WARN_ON(irqs_disabled()); - - spin_lock_bh(&call_lock); - atomic_set(&scf_started, 0); - atomic_set(&scf_finished, 0); - func = _func; - info = _info; - - for_each_online_cpu(i) - os_write_file(cpu_data[i].ipi_pipe[1], "C", 1); - - while (atomic_read(&scf_started) != cpus) - barrier(); - - if (wait) - while (atomic_read(&scf_finished) != cpus) - barrier(); - - spin_unlock_bh(&call_lock); - return 0; -} - -#endif diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c index 894c8d303cda..aa1b56f5ac68 100644 --- a/arch/um/kernel/sysrq.c +++ b/arch/um/kernel/sysrq.c @@ -29,7 +29,7 @@ static const struct stacktrace_ops stackops = { void show_stack(struct task_struct *task, unsigned long *stack) { - unsigned long *sp = stack, bp = 0; + unsigned long *sp = stack; struct pt_regs *segv_regs = current->thread.segv_regs; int i; @@ -39,10 +39,6 @@ void show_stack(struct task_struct *task, unsigned long *stack) return; } -#ifdef CONFIG_FRAME_POINTER - bp = get_frame_pointer(task, segv_regs); -#endif - if (!stack) sp = get_stack_pointer(task, segv_regs); diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 209617302df8..8e4daf44e980 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -220,7 +220,7 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, panic("Segfault with no mm"); } - if (SEGV_IS_FIXABLE(&fi) || SEGV_MAYBE_FIXABLE(&fi)) + if (SEGV_IS_FIXABLE(&fi)) err = handle_page_fault(address, ip, is_write, is_user, &si.si_code); else { diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 9274eae6ae7b..07f798f4bcee 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -11,6 +11,7 @@ #include <linux/string.h> #include <linux/utsname.h> #include <linux/sched.h> +#include <linux/kmsg_dump.h> #include <asm/pgtable.h> #include <asm/processor.h> #include <asm/sections.h> @@ -66,12 +67,6 @@ static int show_cpuinfo(struct seq_file *m, void *v) { int index = 0; -#ifdef CONFIG_SMP - index = (struct cpuinfo_um *) v - cpu_data; - if (!cpu_online(index)) - return 0; -#endif - seq_printf(m, "processor\t: %d\n", index); seq_printf(m, "vendor_id\t: User Mode Linux\n"); seq_printf(m, "model name\t: UML\n"); @@ -168,23 +163,6 @@ __uml_setup("debug", no_skas_debug_setup, " this flag is not needed to run gdb on UML in skas mode\n\n" ); -#ifdef CONFIG_SMP -static int __init uml_ncpus_setup(char *line, int *add) -{ - if (!sscanf(line, "%d", &ncpus)) { - printf("Couldn't parse [%s]\n", line); - return -1; - } - - return 0; -} - -__uml_setup("ncpus=", uml_ncpus_setup, -"ncpus=<# of desired CPUs>\n" -" This tells an SMP kernel how many virtual processors to start.\n\n" -); -#endif - static int __init Usage(char *line, int *add) { const char **p; @@ -234,6 +212,7 @@ static void __init uml_postsetup(void) static int panic_exit(struct notifier_block *self, unsigned long unused1, void *unused2) { + kmsg_dump(KMSG_DUMP_PANIC); bust_spinlocks(1); bust_spinlocks(0); uml_exitcode = 1; @@ -247,6 +226,16 @@ static struct notifier_block panic_exit_notifier = { .priority = 0 }; +void uml_finishsetup(void) +{ + atomic_notifier_chain_register(&panic_notifier_list, + &panic_exit_notifier); + + uml_postsetup(); + + new_thread_handler(); +} + /* Set during early boot */ unsigned long task_size; EXPORT_SYMBOL(task_size); @@ -268,7 +257,6 @@ int __init linux_main(int argc, char **argv) unsigned long stack; unsigned int i; int add; - char * mode; for (i = 1; i < argc; i++) { if ((i == 1) && (argv[i][0] == ' ')) @@ -291,15 +279,6 @@ int __init linux_main(int argc, char **argv) /* OS sanity checks that need to happen before the kernel runs */ os_early_checks(); - can_do_skas(); - - if (proc_mm && ptrace_faultinfo) - mode = "SKAS3"; - else - mode = "SKAS0"; - - printf("UML running in %s mode\n", mode); - brk_start = (unsigned long) sbrk(0); /* @@ -334,11 +313,6 @@ int __init linux_main(int argc, char **argv) if (physmem_size + iomem_size > max_physmem) { highmem = physmem_size + iomem_size - max_physmem; physmem_size -= highmem; -#ifndef CONFIG_HIGHMEM - highmem = 0; - printf("CONFIG_HIGHMEM not enabled - physical memory shrunk " - "to %Lu bytes\n", physmem_size); -#endif } high_physmem = uml_physmem + physmem_size; @@ -362,11 +336,6 @@ int __init linux_main(int argc, char **argv) printf("Kernel virtual memory size shrunk to %lu bytes\n", virtmem_size); - atomic_notifier_chain_register(&panic_notifier_list, - &panic_exit_notifier); - - uml_postsetup(); - stack_protections((unsigned long) &init_thread_info); os_flush_stdout(); @@ -390,15 +359,3 @@ void __init check_bugs(void) void apply_alternatives(struct alt_instr *start, struct alt_instr *end) { } - -#ifdef CONFIG_SMP -void alternatives_smp_module_add(struct module *mod, char *name, - void *locks, void *locks_end, - void *text, void *text_end) -{ -} - -void alternatives_smp_module_del(struct module *mod) -{ -} -#endif |