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-rw-r--r--arch/xtensa/configs/common_defconfig5
-rw-r--r--arch/xtensa/include/asm/gpio.h60
-rw-r--r--arch/xtensa/include/asm/kvm_para.h1
-rw-r--r--arch/xtensa/include/asm/processor.h3
-rw-r--r--arch/xtensa/include/asm/signal.h7
-rw-r--r--arch/xtensa/include/asm/syscall.h4
-rw-r--r--arch/xtensa/include/asm/thread_info.h1
-rw-r--r--arch/xtensa/include/asm/unistd.h2
-rw-r--r--arch/xtensa/kernel/Makefile2
-rw-r--r--arch/xtensa/kernel/entry.S6
-rw-r--r--arch/xtensa/kernel/init_task.c31
-rw-r--r--arch/xtensa/kernel/process.c9
-rw-r--r--arch/xtensa/kernel/signal.c77
-rw-r--r--arch/xtensa/variants/s6000/dmac.c2
-rw-r--r--arch/xtensa/variants/s6000/gpio.c4
-rw-r--r--arch/xtensa/variants/s6000/include/variant/dmac.h2
-rw-r--r--arch/xtensa/variants/s6000/irq.c4
17 files changed, 48 insertions, 172 deletions
diff --git a/arch/xtensa/configs/common_defconfig b/arch/xtensa/configs/common_defconfig
index b90038e40dd3..a182a4e6d688 100644
--- a/arch/xtensa/configs/common_defconfig
+++ b/arch/xtensa/configs/common_defconfig
@@ -333,11 +333,6 @@ CONFIG_XT2000_SONIC=y
# CONFIG_S2IO is not set
#
-# Token Ring devices
-#
-# CONFIG_TR is not set
-
-#
# Wireless LAN (non-hamradio)
#
CONFIG_NET_RADIO=y
diff --git a/arch/xtensa/include/asm/gpio.h b/arch/xtensa/include/asm/gpio.h
index a8c9fc46c790..b3799d88ffcf 100644
--- a/arch/xtensa/include/asm/gpio.h
+++ b/arch/xtensa/include/asm/gpio.h
@@ -1,56 +1,4 @@
-/*
- * Generic GPIO API implementation for xtensa.
- *
- * Stolen from x86, which is derived from the generic GPIO API for powerpc:
- *
- * Copyright (c) 2007-2008 MontaVista Software, Inc.
- *
- * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef _ASM_XTENSA_GPIO_H
-#define _ASM_XTENSA_GPIO_H
-
-#include <asm-generic/gpio.h>
-
-#ifdef CONFIG_GPIOLIB
-
-/*
- * Just call gpiolib.
- */
-static inline int gpio_get_value(unsigned int gpio)
-{
- return __gpio_get_value(gpio);
-}
-
-static inline void gpio_set_value(unsigned int gpio, int value)
-{
- __gpio_set_value(gpio, value);
-}
-
-static inline int gpio_cansleep(unsigned int gpio)
-{
- return __gpio_cansleep(gpio);
-}
-
-static inline int gpio_to_irq(unsigned int gpio)
-{
- return __gpio_to_irq(gpio);
-}
-
-/*
- * Not implemented, yet.
- */
-static inline int irq_to_gpio(unsigned int irq)
-{
- return -EINVAL;
-}
-
-#endif /* CONFIG_GPIOLIB */
-
-#endif /* _ASM_XTENSA_GPIO_H */
+#ifndef __LINUX_GPIO_H
+#warning Include linux/gpio.h instead of asm/gpio.h
+#include <linux/gpio.h>
+#endif
diff --git a/arch/xtensa/include/asm/kvm_para.h b/arch/xtensa/include/asm/kvm_para.h
new file mode 100644
index 000000000000..14fab8f0b957
--- /dev/null
+++ b/arch/xtensa/include/asm/kvm_para.h
@@ -0,0 +1 @@
+#include <asm-generic/kvm_para.h>
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 3acb26e8dead..5c371d8d4528 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -168,9 +168,6 @@ struct mm_struct;
/* Free all resources held by a thread. */
#define release_thread(thread) do { } while(0)
-/* Prepare to copy thread state - unlazy all lazy status */
-extern void prepare_to_copy(struct task_struct*);
-
/* Create a kernel thread without removing it from tasklists */
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
diff --git a/arch/xtensa/include/asm/signal.h b/arch/xtensa/include/asm/signal.h
index 633ba73bc4d2..7f201b9d4195 100644
--- a/arch/xtensa/include/asm/signal.h
+++ b/arch/xtensa/include/asm/signal.h
@@ -120,13 +120,6 @@ typedef void (*__sighandler_t)(int);
#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
#ifdef __KERNEL__
-struct old_sigaction {
- __sighandler_t sa_handler;
- old_sigset_t sa_mask;
- unsigned long sa_flags;
- void (*sa_restorer)(void);
-};
-
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index efcf33b92e4c..0b9f2e13c781 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -15,10 +15,6 @@ asmlinkage long xtensa_clone(unsigned long, unsigned long, struct pt_regs*);
asmlinkage long xtensa_ptrace(long, long, long, long);
asmlinkage long xtensa_sigreturn(struct pt_regs*);
asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
-asmlinkage long xtensa_sigsuspend(struct pt_regs*);
-asmlinkage long xtensa_rt_sigsuspend(struct pt_regs*);
-asmlinkage long xtensa_sigaction(int, const struct old_sigaction*,
- struct old_sigaction*);
asmlinkage long xtensa_sigaltstack(struct pt_regs *regs);
asmlinkage long sys_rt_sigaction(int,
const struct sigaction __user *,
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h
index 6abbedd09d85..81abfd5d01ac 100644
--- a/arch/xtensa/include/asm/thread_info.h
+++ b/arch/xtensa/include/asm/thread_info.h
@@ -131,6 +131,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_IRET 4 /* return with iret */
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
index 798ee6d285a1..bc7e005faa60 100644
--- a/arch/xtensa/include/asm/unistd.h
+++ b/arch/xtensa/include/asm/unistd.h
@@ -507,7 +507,7 @@ __SYSCALL(229, sys_rt_sigtimedwait, 4)
#define __NR_rt_sigqueueinfo 230
__SYSCALL(230, sys_rt_sigqueueinfo, 3)
#define __NR_rt_sigsuspend 231
-__SYSCALL(231, xtensa_rt_sigsuspend, 2)
+__SYSCALL(231, sys_rt_sigsuspend, 2)
/* Message */
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile
index 2d2728b3e862..59fc3fe15572 100644
--- a/arch/xtensa/kernel/Makefile
+++ b/arch/xtensa/kernel/Makefile
@@ -6,7 +6,7 @@ extra-y := head.o vmlinux.lds
obj-y := align.o entry.o irq.o coprocessor.o process.o ptrace.o \
setup.o signal.o syscall.o time.o traps.o vectors.o platform.o \
- pci-dma.o init_task.o io.o
+ pci-dma.o io.o
obj-$(CONFIG_KGDB) += xtensa-stub.o
obj-$(CONFIG_PCI) += pci.o
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 6223f3346b5c..7e6236073397 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -409,16 +409,16 @@ common_exception_return:
l32i a4, a2, TI_FLAGS
_bbsi.l a4, TIF_NEED_RESCHED, 3f
+ _bbsi.l a4, TIF_NOTIFY_RESUME, 2f
_bbci.l a4, TIF_SIGPENDING, 4f
- l32i a4, a1, PT_DEPC
+2: l32i a4, a1, PT_DEPC
bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 4f
/* Call do_signal() */
- movi a4, do_signal # int do_signal(struct pt_regs*, sigset_t*)
+ movi a4, do_notify_resume # int do_notify_resume(struct pt_regs*)
mov a6, a1
- movi a7, 0
callx4 a4
j 1b
diff --git a/arch/xtensa/kernel/init_task.c b/arch/xtensa/kernel/init_task.c
deleted file mode 100644
index cd122fb7e48a..000000000000
--- a/arch/xtensa/kernel/init_task.c
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * arch/xtensa/kernel/init_task.c
- *
- * Xtensa Processor version.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2007 Tensilica Inc.
- *
- * Chris Zankel <chris@zankel.net>
- */
-
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/init_task.h>
-#include <linux/module.h>
-#include <linux/mqueue.h>
-
-#include <asm/uaccess.h>
-
-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-union thread_union init_thread_union __init_task_data =
- { INIT_THREAD_INFO(init_task) };
-
-struct task_struct init_task = INIT_TASK(init_task);
-
-EXPORT_SYMBOL(init_task);
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 6a2d6edf8f72..9b306e550e3f 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -140,13 +140,16 @@ void flush_thread(void)
}
/*
- * This is called before the thread is copied.
+ * this gets called so that we can store coprocessor state into memory and
+ * copy the current task into the new thread.
*/
-void prepare_to_copy(struct task_struct *tsk)
+int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
#if XTENSA_HAVE_COPROCESSORS
- coprocessor_flush_all(task_thread_info(tsk));
+ coprocessor_flush_all(task_thread_info(src));
#endif
+ *dst = *src;
+ return 0;
}
/*
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index d78869a00b11..b9f8e5850d3a 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -20,6 +20,7 @@
#include <linux/ptrace.h>
#include <linux/personality.h>
#include <linux/freezer.h>
+#include <linux/tracehook.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
@@ -29,10 +30,6 @@
#define DEBUG_SIG 0
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
-
extern struct task_struct *coproc_owners[];
struct rt_sigframe
@@ -248,6 +245,9 @@ asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3,
sigset_t set;
int ret;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
if (regs->depc > 64)
panic("rt_sigreturn in double exception!\n");
@@ -259,7 +259,6 @@ asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3,
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
if (restore_sigcontext(regs, frame))
@@ -426,37 +425,6 @@ give_sigsegv:
return -EFAULT;
}
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-
-asmlinkage long xtensa_rt_sigsuspend(sigset_t __user *unewset,
- size_t sigsetsize,
- long a2, long a3, long a4, long a5,
- struct pt_regs *regs)
-{
- sigset_t saveset, newset;
-
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
- return -EINVAL;
-
- if (copy_from_user(&newset, unewset, sizeof(newset)))
- return -EFAULT;
-
- sigdelsetmask(&newset, ~_BLOCKABLE);
- saveset = current->blocked;
- set_current_blocked(&newset);
-
- regs->areg[2] = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(regs, &saveset))
- return -EINTR;
- }
-}
-
asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
stack_t __user *uoss,
long a2, long a3, long a4, long a5,
@@ -476,21 +444,12 @@ asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
* the kernel can handle, and then we build all the user-level signal handling
* stack-frames in one go after that.
*/
-int do_signal(struct pt_regs *regs, sigset_t *oldset)
+static void do_signal(struct pt_regs *regs)
{
siginfo_t info;
int signr;
struct k_sigaction ka;
- if (!user_mode(regs))
- return 0;
-
- if (try_to_freeze())
- goto no_signal;
-
- if (!oldset)
- oldset = &current->blocked;
-
task_pt_regs(current)->icountlevel = 0;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
@@ -530,18 +489,17 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
/* Whee! Actually deliver the signal. */
/* Set up the stack frame */
- ret = setup_frame(signr, &ka, &info, oldset, regs);
+ ret = setup_frame(signr, &ka, &info, sigmask_to_save(), regs);
if (ret)
- return ret;
+ return;
- block_sigmask(&ka, signr);
+ signal_delivered(signr, info, ka, regs, 0);
if (current->ptrace & PT_SINGLESTEP)
task_pt_regs(current)->icountlevel = 1;
- return 1;
+ return;
}
-no_signal:
/* Did we come from a system call? */
if ((signed) regs->syscall >= 0) {
/* Restart the system call - no handlers present */
@@ -558,8 +516,23 @@ no_signal:
break;
}
}
+
+ /* If there's no signal to deliver, we just restore the saved mask. */
+ restore_saved_sigmask();
+
if (current->ptrace & PT_SINGLESTEP)
task_pt_regs(current)->icountlevel = 1;
- return 0;
+ return;
}
+void do_notify_resume(struct pt_regs *regs)
+{
+ if (!user_mode(regs))
+ return;
+
+ if (test_thread_flag(TIF_SIGPENDING))
+ do_signal(regs);
+
+ if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME))
+ tracehook_notify_resume(regs);
+}
diff --git a/arch/xtensa/variants/s6000/dmac.c b/arch/xtensa/variants/s6000/dmac.c
index dc7f7c573518..340f5bb0b5ef 100644
--- a/arch/xtensa/variants/s6000/dmac.c
+++ b/arch/xtensa/variants/s6000/dmac.c
@@ -1,5 +1,5 @@
/*
- * Authors: Oskar Schirmer <os@emlix.com>
+ * Authors: Oskar Schirmer <oskar@scara.com>
* Daniel Gloeckner <dg@emlix.com>
* (c) 2008 emlix GmbH http://www.emlix.com
*
diff --git a/arch/xtensa/variants/s6000/gpio.c b/arch/xtensa/variants/s6000/gpio.c
index 7af0757e001b..b89541ba39ab 100644
--- a/arch/xtensa/variants/s6000/gpio.c
+++ b/arch/xtensa/variants/s6000/gpio.c
@@ -2,8 +2,8 @@
* s6000 gpio driver
*
* Copyright (c) 2009 emlix GmbH
- * Authors: Oskar Schirmer <os@emlix.com>
- * Johannes Weiner <jw@emlix.com>
+ * Authors: Oskar Schirmer <oskar@scara.com>
+ * Johannes Weiner <hannes@cmpxchg.org>
* Daniel Gloeckner <dg@emlix.com>
*/
#include <linux/bitops.h>
diff --git a/arch/xtensa/variants/s6000/include/variant/dmac.h b/arch/xtensa/variants/s6000/include/variant/dmac.h
index e81735b2a206..3f88d9fc6897 100644
--- a/arch/xtensa/variants/s6000/include/variant/dmac.h
+++ b/arch/xtensa/variants/s6000/include/variant/dmac.h
@@ -8,7 +8,7 @@
* Copyright (C) 2006 Tensilica Inc.
* Copyright (C) 2008 Emlix GmbH <info@emlix.com>
* Authors: Fabian Godehardt <fg@emlix.com>
- * Oskar Schirmer <os@emlix.com>
+ * Oskar Schirmer <oskar@scara.com>
* Daniel Gloeckner <dg@emlix.com>
*/
diff --git a/arch/xtensa/variants/s6000/irq.c b/arch/xtensa/variants/s6000/irq.c
index 6651e3285fcf..81a241e79075 100644
--- a/arch/xtensa/variants/s6000/irq.c
+++ b/arch/xtensa/variants/s6000/irq.c
@@ -2,8 +2,8 @@
* s6000 irq crossbar
*
* Copyright (c) 2009 emlix GmbH
- * Authors: Johannes Weiner <jw@emlix.com>
- * Oskar Schirmer <os@emlix.com>
+ * Authors: Johannes Weiner <hannes@cmpxchg.org>
+ * Oskar Schirmer <oskar@scara.com>
*/
#include <linux/io.h>
#include <asm/irq.h>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.