mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 03:05:29 +07:00
4ff83ce111
This patch moves all the the symbols defined in um_arch.c, which are mostly boundaries between different parts of the UML kernel address space, to a new header, as-layout.h. There are also a few things here which aren't really related to address space layout, but which don't really have a better place to go. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
219 lines
4.6 KiB
C
219 lines
4.6 KiB
C
/*
|
|
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include "linux/sched.h"
|
|
#include "linux/slab.h"
|
|
#include "linux/ptrace.h"
|
|
#include "linux/proc_fs.h"
|
|
#include "linux/file.h"
|
|
#include "linux/errno.h"
|
|
#include "linux/init.h"
|
|
#include "asm/uaccess.h"
|
|
#include "asm/atomic.h"
|
|
#include "kern_util.h"
|
|
#include "as-layout.h"
|
|
#include "skas.h"
|
|
#include "os.h"
|
|
#include "user_util.h"
|
|
#include "tlb.h"
|
|
#include "kern.h"
|
|
#include "mode.h"
|
|
#include "registers.h"
|
|
|
|
void switch_to_skas(void *prev, void *next)
|
|
{
|
|
struct task_struct *from, *to;
|
|
|
|
from = prev;
|
|
to = next;
|
|
|
|
/* XXX need to check runqueues[cpu].idle */
|
|
if(current->pid == 0)
|
|
switch_timers(0);
|
|
|
|
switch_threads(&from->thread.mode.skas.switch_buf,
|
|
&to->thread.mode.skas.switch_buf);
|
|
|
|
arch_switch_to_skas(current->thread.prev_sched, current);
|
|
|
|
if(current->pid == 0)
|
|
switch_timers(1);
|
|
}
|
|
|
|
extern void schedule_tail(struct task_struct *prev);
|
|
|
|
/* This is called magically, by its address being stuffed in a jmp_buf
|
|
* and being longjmp-d to.
|
|
*/
|
|
void new_thread_handler(void)
|
|
{
|
|
int (*fn)(void *), n;
|
|
void *arg;
|
|
|
|
if(current->thread.prev_sched != NULL)
|
|
schedule_tail(current->thread.prev_sched);
|
|
current->thread.prev_sched = NULL;
|
|
|
|
fn = current->thread.request.u.thread.proc;
|
|
arg = current->thread.request.u.thread.arg;
|
|
|
|
/* The return value is 1 if the kernel thread execs a process,
|
|
* 0 if it just exits
|
|
*/
|
|
n = run_kernel_thread(fn, arg, ¤t->thread.exec_buf);
|
|
if(n == 1){
|
|
/* Handle any immediate reschedules or signals */
|
|
interrupt_end();
|
|
userspace(¤t->thread.regs.regs);
|
|
}
|
|
else do_exit(0);
|
|
}
|
|
|
|
void release_thread_skas(struct task_struct *task)
|
|
{
|
|
}
|
|
|
|
/* Called magically, see new_thread_handler above */
|
|
void fork_handler(void)
|
|
{
|
|
force_flush_all();
|
|
if(current->thread.prev_sched == NULL)
|
|
panic("blech");
|
|
|
|
schedule_tail(current->thread.prev_sched);
|
|
|
|
/* XXX: if interrupt_end() calls schedule, this call to
|
|
* arch_switch_to_skas isn't needed. We could want to apply this to
|
|
* improve performance. -bb */
|
|
arch_switch_to_skas(current->thread.prev_sched, current);
|
|
|
|
current->thread.prev_sched = NULL;
|
|
|
|
/* Handle any immediate reschedules or signals */
|
|
interrupt_end();
|
|
|
|
userspace(¤t->thread.regs.regs);
|
|
}
|
|
|
|
int copy_thread_skas(int nr, unsigned long clone_flags, unsigned long sp,
|
|
unsigned long stack_top, struct task_struct * p,
|
|
struct pt_regs *regs)
|
|
{
|
|
void (*handler)(void);
|
|
|
|
if(current->thread.forking){
|
|
memcpy(&p->thread.regs.regs.skas, ®s->regs.skas,
|
|
sizeof(p->thread.regs.regs.skas));
|
|
REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.skas.regs, 0);
|
|
if(sp != 0) REGS_SP(p->thread.regs.regs.skas.regs) = sp;
|
|
|
|
handler = fork_handler;
|
|
|
|
arch_copy_thread(¤t->thread.arch, &p->thread.arch);
|
|
}
|
|
else {
|
|
init_thread_registers(&p->thread.regs.regs);
|
|
p->thread.request.u.thread = current->thread.request.u.thread;
|
|
handler = new_thread_handler;
|
|
}
|
|
|
|
new_thread(task_stack_page(p), &p->thread.mode.skas.switch_buf,
|
|
handler);
|
|
return(0);
|
|
}
|
|
|
|
int new_mm(unsigned long stack)
|
|
{
|
|
int fd;
|
|
|
|
fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
|
|
if(fd < 0)
|
|
return(fd);
|
|
|
|
if(skas_needs_stub)
|
|
map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack);
|
|
|
|
return(fd);
|
|
}
|
|
|
|
void init_idle_skas(void)
|
|
{
|
|
cpu_tasks[current_thread->cpu].pid = os_getpid();
|
|
default_idle();
|
|
}
|
|
|
|
extern void start_kernel(void);
|
|
|
|
static int start_kernel_proc(void *unused)
|
|
{
|
|
int pid;
|
|
|
|
block_signals();
|
|
pid = os_getpid();
|
|
|
|
cpu_tasks[0].pid = pid;
|
|
cpu_tasks[0].task = current;
|
|
#ifdef CONFIG_SMP
|
|
cpu_online_map = cpumask_of_cpu(0);
|
|
#endif
|
|
start_kernel();
|
|
return(0);
|
|
}
|
|
|
|
extern int userspace_pid[];
|
|
|
|
int start_uml_skas(void)
|
|
{
|
|
if(proc_mm)
|
|
userspace_pid[0] = start_userspace(0);
|
|
|
|
init_new_thread_signals();
|
|
|
|
init_task.thread.request.u.thread.proc = start_kernel_proc;
|
|
init_task.thread.request.u.thread.arg = NULL;
|
|
return(start_idle_thread(task_stack_page(&init_task),
|
|
&init_task.thread.mode.skas.switch_buf));
|
|
}
|
|
|
|
int external_pid_skas(struct task_struct *task)
|
|
{
|
|
#warning Need to look up userspace_pid by cpu
|
|
return(userspace_pid[0]);
|
|
}
|
|
|
|
int thread_pid_skas(struct task_struct *task)
|
|
{
|
|
#warning Need to look up userspace_pid by cpu
|
|
return(userspace_pid[0]);
|
|
}
|
|
|
|
void kill_off_processes_skas(void)
|
|
{
|
|
if(proc_mm)
|
|
#warning need to loop over userspace_pids in kill_off_processes_skas
|
|
os_kill_ptraced_process(userspace_pid[0], 1);
|
|
else {
|
|
struct task_struct *p;
|
|
int pid, me;
|
|
|
|
me = os_getpid();
|
|
for_each_process(p){
|
|
if(p->mm == NULL)
|
|
continue;
|
|
|
|
pid = p->mm->context.skas.id.u.pid;
|
|
os_kill_ptraced_process(pid, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned long current_stub_stack(void)
|
|
{
|
|
if(current->mm == NULL)
|
|
return(0);
|
|
|
|
return(current->mm->context.skas.id.stack);
|
|
}
|