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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/arch/um/kernel/process.c
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@@ -1,9 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
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  * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
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  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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  * Copyright 2003 PathScale, Inc.
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- * Licensed under the GPL
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  */
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 #include <linux/stddef.h>
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@@ -25,14 +25,13 @@
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 #include <linux/threads.h>
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 #include <linux/tracehook.h>
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 #include <asm/current.h>
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-#include <asm/pgtable.h>
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 #include <asm/mmu_context.h>
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 #include <linux/uaccess.h>
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 #include <as-layout.h>
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 #include <kern_util.h>
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 #include <os.h>
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 #include <skas.h>
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-#include <timer-internal.h>
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+#include <linux/time-internal.h>
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 /*
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  * This is a per-cpu array.  A processor only modifies its entry and it only
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@@ -100,9 +99,10 @@
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 	if (need_resched())
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 		schedule();
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-	if (test_thread_flag(TIF_SIGPENDING))
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+	if (test_thread_flag(TIF_SIGPENDING) ||
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+	    test_thread_flag(TIF_NOTIFY_SIGNAL))
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 		do_signal(regs);
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-	if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME))
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+	if (test_thread_flag(TIF_NOTIFY_RESUME))
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 		tracehook_notify_resume(regs);
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 }
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@@ -154,10 +154,10 @@
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 }
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 int copy_thread(unsigned long clone_flags, unsigned long sp,
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-		unsigned long arg, struct task_struct * p)
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+		unsigned long arg, struct task_struct * p, unsigned long tls)
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 {
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 	void (*handler)(void);
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-	int kthread = current->flags & PF_KTHREAD;
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+	int kthread = current->flags & (PF_KTHREAD | PF_IO_WORKER);
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 	int ret = 0;
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 	p->thread = (struct thread_struct) INIT_THREAD;
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@@ -188,7 +188,7 @@
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 		 * Set a new TLS for the child thread?
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 		 */
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 		if (clone_flags & CLONE_SETTLS)
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-			ret = arch_copy_tls(p);
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+			ret = arch_set_tls(p, tls);
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 	}
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 	return ret;
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@@ -203,11 +203,22 @@
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 	kmalloc_ok = save_kmalloc_ok;
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 }
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+static void um_idle_sleep(void)
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+{
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+	unsigned long long duration = UM_NSEC_PER_SEC;
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+
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+	if (time_travel_mode != TT_MODE_OFF) {
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+		time_travel_sleep(duration);
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+	} else {
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+		os_idle_sleep(duration);
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+	}
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+}
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+
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 void arch_cpu_idle(void)
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 {
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 	cpu_tasks[current_thread_info()->cpu].pid = os_getpid();
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-	os_idle_sleep(UM_NSEC_PER_SEC);
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-	local_irq_enable();
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+	um_idle_sleep();
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+	raw_local_irq_enable();
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 }
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 int __cant_sleep(void) {
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@@ -300,13 +311,12 @@
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 	return count;
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 }
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-static const struct file_operations sysemu_proc_fops = {
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-	.owner		= THIS_MODULE,
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-	.open		= sysemu_proc_open,
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-	.read		= seq_read,
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-	.llseek		= seq_lseek,
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-	.release	= single_release,
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-	.write		= sysemu_proc_write,
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+static const struct proc_ops sysemu_proc_ops = {
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+	.proc_open	= sysemu_proc_open,
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+	.proc_read	= seq_read,
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+	.proc_lseek	= seq_lseek,
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+	.proc_release	= single_release,
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+	.proc_write	= sysemu_proc_write,
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 };
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 int __init make_proc_sysemu(void)
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@@ -315,7 +325,7 @@
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 	if (!sysemu_supported)
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 		return 0;
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-	ent = proc_create("sysemu", 0600, NULL, &sysemu_proc_fops);
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+	ent = proc_create("sysemu", 0600, NULL, &sysemu_proc_ops);
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 	if (ent == NULL)
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 	{
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@@ -332,7 +342,7 @@
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 {
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 	struct task_struct *task = t ? t : current;
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-	if (!(task->ptrace & PT_DTRACE))
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+	if (!test_thread_flag(TIF_SINGLESTEP))
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 		return 0;
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 	if (task->thread.singlestep_syscall)