2006-01-08 02:01:31 -07:00
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/*
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2007-10-16 02:27:00 -06:00
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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2005-04-16 16:20:36 -06:00
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* Licensed under the GPL
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*/
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2008-02-04 23:31:14 -07:00
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/string.h>
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#include <linux/utsname.h>
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2012-05-03 03:03:00 -06:00
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#include <linux/sched.h>
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2008-02-04 23:31:14 -07:00
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#include <asm/pgtable.h>
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#include <asm/processor.h>
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2013-11-12 12:42:27 -07:00
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#include <asm/sections.h>
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2008-02-04 23:31:14 -07:00
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#include <asm/setup.h>
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2012-10-07 20:27:32 -06:00
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#include <as-layout.h>
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#include <arch.h>
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#include <init.h>
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#include <kern.h>
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#include <kern_util.h>
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#include <mem_user.h>
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#include <os.h>
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2005-04-16 16:20:36 -06:00
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#define DEFAULT_COMMAND_LINE "root=98:0"
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2007-05-06 15:51:26 -06:00
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/* Changed in add_arg and setup_arch, which run before SMP is started */
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2007-02-12 01:54:26 -07:00
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static char __initdata command_line[COMMAND_LINE_SIZE] = { 0 };
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2005-04-16 16:20:36 -06:00
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2007-02-12 01:54:26 -07:00
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static void __init add_arg(char *arg)
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2005-04-16 16:20:36 -06:00
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{
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if (strlen(command_line) + strlen(arg) + 1 > COMMAND_LINE_SIZE) {
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printf("add_arg: Too many command line arguments!\n");
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exit(1);
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}
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2007-10-16 02:27:00 -06:00
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if (strlen(command_line) > 0)
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2005-04-16 16:20:36 -06:00
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strcat(command_line, " ");
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strcat(command_line, arg);
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}
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2007-05-06 15:51:26 -06:00
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/*
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* These fields are initialized at boot time and not changed.
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* XXX This structure is used only in the non-SMP case. Maybe this
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* should be moved to smp.c.
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*/
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struct cpuinfo_um boot_cpu_data = {
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2005-04-16 16:20:36 -06:00
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.loops_per_jiffy = 0,
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.ipi_pipe = { -1, -1 }
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};
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2012-05-03 03:03:00 -06:00
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union thread_union cpu0_irqstack
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__attribute__((__section__(".data..init_irqstack"))) =
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{ INIT_THREAD_INFO(init_task) };
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2005-04-16 16:20:36 -06:00
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unsigned long thread_saved_pc(struct task_struct *task)
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{
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2007-10-16 02:26:58 -06:00
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/* FIXME: Need to look up userspace_pid by cpu */
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return os_process_pc(userspace_pid[0]);
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2005-04-16 16:20:36 -06:00
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}
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2007-05-06 15:50:59 -06:00
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/* Changed in setup_arch, which is called in early boot */
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static char host_info[(__NEW_UTS_LEN + 1) * 5];
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2005-04-16 16:20:36 -06:00
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static int show_cpuinfo(struct seq_file *m, void *v)
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{
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int index = 0;
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#ifdef CONFIG_SMP
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index = (struct cpuinfo_um *) v - cpu_data;
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if (!cpu_online(index))
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return 0;
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#endif
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seq_printf(m, "processor\t: %d\n", index);
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seq_printf(m, "vendor_id\t: User Mode Linux\n");
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seq_printf(m, "model name\t: UML\n");
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2007-10-16 02:26:56 -06:00
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seq_printf(m, "mode\t\t: skas\n");
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2005-04-16 16:20:36 -06:00
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seq_printf(m, "host\t\t: %s\n", host_info);
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seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
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loops_per_jiffy/(500000/HZ),
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(loops_per_jiffy/(5000/HZ)) % 100);
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2007-05-06 15:50:58 -06:00
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return 0;
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2005-04-16 16:20:36 -06:00
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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return *pos < NR_CPUS ? cpu_data + *pos : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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2006-09-27 02:50:33 -06:00
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const struct seq_operations cpuinfo_op = {
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2005-04-16 16:20:36 -06:00
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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/* Set in linux_main */
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unsigned long uml_physmem;
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2011-08-18 13:14:10 -06:00
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EXPORT_SYMBOL(uml_physmem);
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2007-05-06 15:51:26 -06:00
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unsigned long uml_reserved; /* Also modified in mem_init */
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2005-04-16 16:20:36 -06:00
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unsigned long start_vm;
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unsigned long end_vm;
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2007-05-06 15:51:26 -06:00
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/* Set in uml_ncpus_setup */
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2005-04-16 16:20:36 -06:00
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int ncpus = 1;
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/* Set in early boot */
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static int have_root __initdata = 0;
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2007-05-06 15:51:26 -06:00
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/* Set in uml_mem_setup and modified in linux_main */
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2005-11-07 01:58:57 -07:00
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long long physmem_size = 32 * 1024 * 1024;
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2005-04-16 16:20:36 -06:00
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2008-04-28 03:13:52 -06:00
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static const char *usage_string =
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2005-04-16 16:20:36 -06:00
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"User Mode Linux v%s\n"
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" available at http://user-mode-linux.sourceforge.net/\n\n";
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static int __init uml_version_setup(char *line, int *add)
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{
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2006-10-02 03:18:13 -06:00
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printf("%s\n", init_utsname()->release);
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2005-04-16 16:20:36 -06:00
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exit(0);
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return 0;
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}
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__uml_setup("--version", uml_version_setup,
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"--version\n"
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" Prints the version number of the kernel.\n\n"
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);
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static int __init uml_root_setup(char *line, int *add)
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{
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have_root = 1;
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return 0;
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}
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__uml_setup("root=", uml_root_setup,
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"root=<file containing the root fs>\n"
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" This is actually used by the generic kernel in exactly the same\n"
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" way as in any other kernel. If you configure a number of block\n"
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" devices and want to boot off something other than ubd0, you \n"
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" would use something like:\n"
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" root=/dev/ubd5\n\n"
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);
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2006-02-07 13:58:40 -07:00
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static int __init no_skas_debug_setup(char *line, int *add)
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{
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printf("'debug' is not necessary to gdb UML in skas mode - run \n");
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2008-05-12 15:01:48 -06:00
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printf("'gdb linux'\n");
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2006-02-07 13:58:40 -07:00
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return 0;
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}
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__uml_setup("debug", no_skas_debug_setup,
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"debug\n"
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" this flag is not needed to run gdb on UML in skas mode\n\n"
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);
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2005-04-16 16:20:36 -06:00
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#ifdef CONFIG_SMP
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static int __init uml_ncpus_setup(char *line, int *add)
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{
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2007-05-06 15:50:58 -06:00
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if (!sscanf(line, "%d", &ncpus)) {
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printf("Couldn't parse [%s]\n", line);
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return -1;
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}
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2005-04-16 16:20:36 -06:00
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2007-05-06 15:50:58 -06:00
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return 0;
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2005-04-16 16:20:36 -06:00
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}
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__uml_setup("ncpus=", uml_ncpus_setup,
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"ncpus=<# of desired CPUs>\n"
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2007-10-16 02:27:00 -06:00
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" This tells an SMP kernel how many virtual processors to start.\n\n"
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2005-04-16 16:20:36 -06:00
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);
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#endif
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static int __init Usage(char *line, int *add)
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{
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2007-05-06 15:50:58 -06:00
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const char **p;
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2005-04-16 16:20:36 -06:00
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2006-10-02 03:18:13 -06:00
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printf(usage_string, init_utsname()->release);
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2007-05-06 15:50:58 -06:00
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p = &__uml_help_start;
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while (p < &__uml_help_end) {
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printf("%s", *p);
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p++;
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}
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2005-04-16 16:20:36 -06:00
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exit(0);
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return 0;
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}
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__uml_setup("--help", Usage,
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"--help\n"
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" Prints this message.\n\n"
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);
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2008-02-04 23:30:50 -07:00
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static void __init uml_checksetup(char *line, int *add)
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2005-04-16 16:20:36 -06:00
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{
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struct uml_param *p;
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p = &__uml_setup_start;
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2008-02-04 23:31:14 -07:00
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while (p < &__uml_setup_end) {
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2008-04-28 03:13:52 -06:00
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size_t n;
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2005-04-16 16:20:36 -06:00
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n = strlen(p->str);
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2007-10-16 02:27:00 -06:00
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if (!strncmp(line, p->str, n) && p->setup_func(line + n, add))
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2008-02-04 23:30:50 -07:00
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return;
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2005-04-16 16:20:36 -06:00
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p++;
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}
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}
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static void __init uml_postsetup(void)
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{
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initcall_t *p;
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p = &__uml_postsetup_start;
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2008-02-04 23:31:14 -07:00
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while (p < &__uml_postsetup_end) {
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2005-04-16 16:20:36 -06:00
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(*p)();
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p++;
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}
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return;
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}
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2008-02-04 23:31:08 -07:00
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static int panic_exit(struct notifier_block *self, unsigned long unused1,
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void *unused2)
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{
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bust_spinlocks(1);
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bust_spinlocks(0);
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uml_exitcode = 1;
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os_dump_core();
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return 0;
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}
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static struct notifier_block panic_exit_notifier = {
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.notifier_call = panic_exit,
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.next = NULL,
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.priority = 0
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};
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2005-04-16 16:20:36 -06:00
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/* Set during early boot */
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2008-02-08 05:22:07 -07:00
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unsigned long task_size;
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EXPORT_SYMBOL(task_size);
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unsigned long host_task_size;
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2005-04-16 16:20:36 -06:00
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unsigned long brk_start;
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unsigned long end_iomem;
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EXPORT_SYMBOL(end_iomem);
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#define MIN_VMALLOC (32 * 1024 * 1024)
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2006-07-10 05:45:06 -06:00
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extern char __binary_start;
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2007-02-12 01:54:26 -07:00
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int __init linux_main(int argc, char **argv)
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2005-04-16 16:20:36 -06:00
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{
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unsigned long avail, diff;
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unsigned long virtmem_size, max_physmem;
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2008-05-12 15:01:57 -06:00
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unsigned long stack;
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2008-04-28 03:13:52 -06:00
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unsigned int i;
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int add;
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2005-07-27 12:43:31 -06:00
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char * mode;
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2005-04-16 16:20:36 -06:00
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2007-10-16 02:27:00 -06:00
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for (i = 1; i < argc; i++) {
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if ((i == 1) && (argv[i][0] == ' '))
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continue;
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2005-04-16 16:20:36 -06:00
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add = 1;
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uml_checksetup(argv[i], &add);
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if (add)
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add_arg(argv[i]);
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}
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2007-10-16 02:27:00 -06:00
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if (have_root == 0)
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2005-04-16 16:20:36 -06:00
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add_arg(DEFAULT_COMMAND_LINE);
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2008-06-05 23:46:12 -06:00
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host_task_size = os_get_top_address();
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2008-02-08 05:22:07 -07:00
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/*
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* TASK_SIZE needs to be PGDIR_SIZE aligned or else exit_mmap craps
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* out
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*/
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task_size = host_task_size & PGDIR_MASK;
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2007-10-16 02:27:00 -06:00
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/* OS sanity checks that need to happen before the kernel runs */
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2005-09-03 16:57:47 -06:00
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os_early_checks();
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2005-07-27 12:43:31 -06:00
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uml: throw out CONFIG_MODE_TT
This patchset throws out tt mode, which has been non-functional for a while.
This is done in phases, interspersed with code cleanups on the affected files.
The removal is done as follows:
remove all code, config options, and files which depend on
CONFIG_MODE_TT
get rid of the CHOOSE_MODE macro, which decided whether to
call tt-mode or skas-mode code, and replace invocations with their
skas portions
replace all now-trivial procedures with their skas equivalents
There are now a bunch of now-redundant pieces of data structures, including
mode-specific pieces of the thread structure, pt_regs, and mm_context. These
are all replaced with their skas-specific contents.
As part of the ongoing style compliance project, I made a style pass over all
files that were changed. There are three such patches, one for each phase,
covering the files affected by that phase but no later ones.
I noticed that we weren't freeing the LDT state associated with a process when
it exited, so that's fixed in one of the later patches.
The last patch is a tidying patch which I've had for a while, but which caused
inexplicable crashes under tt mode. Since that is no longer a problem, this
can now go in.
This patch:
Start getting rid of tt mode support.
This patch throws out CONFIG_MODE_TT and all config options, code, and files
which depend on it.
CONFIG_MODE_SKAS is gone and everything that depends on it is included
unconditionally.
The few changed lines are in re-written Kconfig help, lines which needed
something skas-related removed from them, and a few more which weren't
strictly deletions.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 02:26:50 -06:00
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can_do_skas();
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if (proc_mm && ptrace_faultinfo)
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2005-07-27 12:43:31 -06:00
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mode = "SKAS3";
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else
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mode = "SKAS0";
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printf("UML running in %s mode\n", mode);
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
brk_start = (unsigned long) sbrk(0);
|
2007-10-16 02:26:58 -06:00
|
|
|
|
2007-10-16 02:27:00 -06:00
|
|
|
/*
|
|
|
|
* Increase physical memory size for exec-shield users
|
|
|
|
* so they actually get what they asked for. This should
|
|
|
|
* add zero for non-exec shield users
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
|
2007-10-16 02:27:00 -06:00
|
|
|
if (diff > 1024 * 1024) {
|
2005-04-16 16:20:36 -06:00
|
|
|
printf("Adding %ld bytes to physical memory to account for "
|
|
|
|
"exec-shield gap\n", diff);
|
|
|
|
physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end);
|
|
|
|
}
|
|
|
|
|
2007-05-06 15:51:26 -06:00
|
|
|
uml_physmem = (unsigned long) &__binary_start & PAGE_MASK;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Reserve up to 4M after the current brk */
|
|
|
|
uml_reserved = ROUND_4M(brk_start) + (1 << 22);
|
|
|
|
|
2006-10-02 03:18:13 -06:00
|
|
|
setup_machinename(init_utsname()->machine);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
highmem = 0;
|
|
|
|
iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK;
|
2008-02-08 05:22:07 -07:00
|
|
|
max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-10-16 02:27:00 -06:00
|
|
|
/*
|
|
|
|
* Zones have to begin on a 1 << MAX_ORDER page boundary,
|
2005-04-16 16:20:36 -06:00
|
|
|
* so this makes sure that's true for highmem
|
|
|
|
*/
|
|
|
|
max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1);
|
2007-10-16 02:27:00 -06:00
|
|
|
if (physmem_size + iomem_size > max_physmem) {
|
2005-04-16 16:20:36 -06:00
|
|
|
highmem = physmem_size + iomem_size - max_physmem;
|
|
|
|
physmem_size -= highmem;
|
|
|
|
#ifndef CONFIG_HIGHMEM
|
|
|
|
highmem = 0;
|
|
|
|
printf("CONFIG_HIGHMEM not enabled - physical memory shrunk "
|
2006-03-27 02:14:29 -07:00
|
|
|
"to %Lu bytes\n", physmem_size);
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
high_physmem = uml_physmem + physmem_size;
|
|
|
|
end_iomem = high_physmem + iomem_size;
|
|
|
|
high_memory = (void *) end_iomem;
|
|
|
|
|
|
|
|
start_vm = VMALLOC_START;
|
|
|
|
|
|
|
|
setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
|
2007-10-16 02:27:00 -06:00
|
|
|
if (init_maps(physmem_size, iomem_size, highmem)) {
|
2006-03-27 02:14:29 -07:00
|
|
|
printf("Failed to allocate mem_map for %Lu bytes of physical "
|
|
|
|
"memory and %Lu bytes of highmem\n", physmem_size,
|
2005-04-16 16:20:36 -06:00
|
|
|
highmem);
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
virtmem_size = physmem_size;
|
2008-05-12 15:01:57 -06:00
|
|
|
stack = (unsigned long) argv;
|
|
|
|
stack &= ~(1024 * 1024 - 1);
|
|
|
|
avail = stack - start_vm;
|
2007-10-16 02:27:00 -06:00
|
|
|
if (physmem_size > avail)
|
|
|
|
virtmem_size = avail;
|
2005-04-16 16:20:36 -06:00
|
|
|
end_vm = start_vm + virtmem_size;
|
|
|
|
|
2007-10-16 02:27:00 -06:00
|
|
|
if (virtmem_size < physmem_size)
|
2005-11-07 01:58:57 -07:00
|
|
|
printf("Kernel virtual memory size shrunk to %lu bytes\n",
|
2005-04-16 16:20:36 -06:00
|
|
|
virtmem_size);
|
|
|
|
|
2008-02-04 23:31:08 -07:00
|
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
|
|
&panic_exit_notifier);
|
|
|
|
|
2007-05-06 15:50:58 -06:00
|
|
|
uml_postsetup();
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-05-10 23:22:30 -06:00
|
|
|
stack_protections((unsigned long) &init_thread_info);
|
2005-04-16 16:20:36 -06:00
|
|
|
os_flush_stdout();
|
|
|
|
|
2007-10-16 02:26:58 -06:00
|
|
|
return start_uml();
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
|
|
{
|
|
|
|
paging_init();
|
2007-02-12 01:54:23 -07:00
|
|
|
strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
|
2007-05-06 15:50:58 -06:00
|
|
|
*cmdline_p = command_line;
|
2007-05-06 15:50:59 -06:00
|
|
|
setup_hostinfo(host_info, sizeof host_info);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void __init check_bugs(void)
|
|
|
|
{
|
|
|
|
arch_check_bugs();
|
2007-05-06 15:50:58 -06:00
|
|
|
os_check_bugs();
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2006-03-23 03:59:32 -07:00
|
|
|
void apply_alternatives(struct alt_instr *start, struct alt_instr *end)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2006-07-03 01:24:09 -06:00
|
|
|
#ifdef CONFIG_SMP
|
2006-03-23 03:59:32 -07:00
|
|
|
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)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
}
|
2006-07-03 01:24:09 -06:00
|
|
|
#endif
|