summaryrefslogtreecommitdiffstats
path: root/arch/microblaze
diff options
context:
space:
mode:
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/Kconfig11
-rw-r--r--arch/microblaze/include/asm/gpio.h57
-rw-r--r--arch/microblaze/include/asm/kvm_para.h1
-rw-r--r--arch/microblaze/include/asm/thread_info.h18
-rw-r--r--arch/microblaze/kernel/entry.S7
-rw-r--r--arch/microblaze/kernel/mcount.S2
-rw-r--r--arch/microblaze/kernel/process.c6
-rw-r--r--arch/microblaze/kernel/signal.c41
-rw-r--r--arch/microblaze/mm/fault.c33
9 files changed, 70 insertions, 106 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index ac22dc7f4ca..0bf44231aaf 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -22,6 +22,7 @@ config MICROBLAZE
select GENERIC_PCI_IOMAP
select GENERIC_CPU_DEVICES
select GENERIC_ATOMIC64
+ select GENERIC_CLOCKEVENTS
config SWAP
def_bool n
@@ -50,14 +51,8 @@ config GENERIC_HWEIGHT
config GENERIC_CALIBRATE_DELAY
def_bool y
-config GENERIC_TIME_VSYSCALL
- def_bool n
-
-config GENERIC_CLOCKEVENTS
- def_bool y
-
config GENERIC_GPIO
- def_bool y
+ bool
config GENERIC_CSUM
def_bool y
@@ -79,8 +74,6 @@ source "arch/microblaze/platform/Kconfig.platform"
menu "Processor type and features"
-source "kernel/time/Kconfig"
-
source "kernel/Kconfig.preempt"
source "kernel/Kconfig.hz"
diff --git a/arch/microblaze/include/asm/gpio.h b/arch/microblaze/include/asm/gpio.h
index 2b2c18be71c..b3799d88ffc 100644
--- a/arch/microblaze/include/asm/gpio.h
+++ b/arch/microblaze/include/asm/gpio.h
@@ -1,53 +1,4 @@
-/*
- * Generic GPIO API implementation 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_MICROBLAZE_GPIO_H
-#define _ASM_MICROBLAZE_GPIO_H
-
-#include <linux/errno.h>
-#include <asm-generic/gpio.h>
-
-#ifdef CONFIG_GPIOLIB
-
-/*
- * We don't (yet) implement inlined/rapid versions for on-chip gpios.
- * 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);
-}
-
-static inline int irq_to_gpio(unsigned int irq)
-{
- return -EINVAL;
-}
-
-#endif /* CONFIG_GPIOLIB */
-
-#endif /* _ASM_MICROBLAZE_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/microblaze/include/asm/kvm_para.h b/arch/microblaze/include/asm/kvm_para.h
new file mode 100644
index 00000000000..14fab8f0b95
--- /dev/null
+++ b/arch/microblaze/include/asm/kvm_para.h
@@ -0,0 +1 @@
+#include <asm-generic/kvm_para.h>
diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h
index 1a8ab6a5c03..6c610234ffa 100644
--- a/arch/microblaze/include/asm/thread_info.h
+++ b/arch/microblaze/include/asm/thread_info.h
@@ -166,7 +166,23 @@ static inline void set_restore_sigmask(void)
{
struct thread_info *ti = current_thread_info();
ti->status |= TS_RESTORE_SIGMASK;
- set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
+ WARN_ON(!test_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags));
+}
+static inline void clear_restore_sigmask(void)
+{
+ current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
+}
+static inline bool test_restore_sigmask(void)
+{
+ return current_thread_info()->status & TS_RESTORE_SIGMASK;
+}
+static inline bool test_and_clear_restore_sigmask(void)
+{
+ struct thread_info *ti = current_thread_info();
+ if (!(ti->status & TS_RESTORE_SIGMASK))
+ return false;
+ ti->status &= ~TS_RESTORE_SIGMASK;
+ return true;
}
#endif
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index daff9e5e4a1..03f7b8ce6b6 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -492,10 +492,11 @@ C_ENTRY(sys_clone):
bnei r6, 1f; /* See if child SP arg (arg 1) is 0. */
lwi r6, r1, PT_R1; /* If so, use paret's stack ptr */
1: addik r7, r1, 0; /* Arg 2: parent context */
- add r8, r0, r0; /* Arg 3: (unused) */
- add r9, r0, r0; /* Arg 4: (unused) */
+ lwi r9, r1, PT_R8; /* parent tid. */
+ lwi r10, r1, PT_R9; /* child tid. */
+ /* do_fork will pick up TLS from regs->r10. */
brid do_fork /* Do real work (tail-call) */
- add r10, r0, r0; /* Arg 5: (unused) */
+ add r8, r0, r0; /* Arg 3: (unused) */
C_ENTRY(sys_execve):
brid microblaze_execve; /* Do real work (tail-call).*/
diff --git a/arch/microblaze/kernel/mcount.S b/arch/microblaze/kernel/mcount.S
index e7eaa7a8cbd..fc1e1322ce4 100644
--- a/arch/microblaze/kernel/mcount.S
+++ b/arch/microblaze/kernel/mcount.S
@@ -138,7 +138,7 @@ NOALIGN_ENTRY(ftrace_call)
#endif /* CONFIG_DYNAMIC_FTRACE */
/* static normal trace */
lwi r6, r1, 120; /* MS: load parent addr */
- addik r5, r15, 0; /* MS: load current function addr */
+ addik r5, r15, -4; /* MS: load current function addr */
/* MS: here is dependency on previous code */
brald r15, r20; /* MS: jump to ftrace handler */
nop;
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 883b92789cd..1944e00f07e 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -182,8 +182,12 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
#endif
ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8;
+ /*
+ * r21 is the thread reg, r10 is 6th arg to clone
+ * which contains TLS area
+ */
if (clone_flags & CLONE_SETTLS)
- ;
+ childregs->r21 = childregs->r10;
return 0;
}
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 7f4c7bef164..76b9722557d 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -41,8 +41,6 @@
#include <asm/cacheflush.h>
#include <asm/syscalls.h>
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
asmlinkage long
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
struct pt_regs *regs)
@@ -106,7 +104,6 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
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->uc.uc_mcontext, &rval))
@@ -310,10 +307,11 @@ do_restart:
* OK, we're invoking a handler
*/
-static int
+static void
handle_signal(unsigned long sig, struct k_sigaction *ka,
- siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
+ siginfo_t *info, struct pt_regs *regs)
{
+ sigset_t *oldset = sigmask_to_save();
int ret;
/* Set up the stack frame */
@@ -323,11 +321,9 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
ret = setup_rt_frame(sig, ka, NULL, oldset, regs);
if (ret)
- return ret;
-
- block_sigmask(ka, sig);
+ return;
- return 0;
+ signal_delivered(sig, info, ka, regs, 0);
}
/*
@@ -344,33 +340,18 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
siginfo_t info;
int signr;
struct k_sigaction ka;
- sigset_t *oldset;
#ifdef DEBUG_SIG
printk(KERN_INFO "do signal: %p %d\n", regs, in_syscall);
printk(KERN_INFO "do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1,
regs->r12, current_thread_info()->flags);
#endif
- if (current_thread_info()->status & TS_RESTORE_SIGMASK)
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
-
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
/* Whee! Actually deliver the signal. */
if (in_syscall)
handle_restart(regs, &ka, 1);
- if (!handle_signal(signr, &ka, &info, oldset, regs)) {
- /*
- * A signal was successfully delivered; the saved
- * sigmask will have been stored in the signal frame,
- * and will be restored by sigreturn, so we can simply
- * clear the TS_RESTORE_SIGMASK flag.
- */
- current_thread_info()->status &=
- ~TS_RESTORE_SIGMASK;
- }
+ handle_signal(signr, &ka, &info, regs);
return;
}
@@ -381,10 +362,7 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
* If there's no signal to deliver, we just put the saved sigmask
* back.
*/
- if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
- current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
- }
+ restore_saved_sigmask();
}
void do_notify_resume(struct pt_regs *regs, int in_syscall)
@@ -401,9 +379,6 @@ void do_notify_resume(struct pt_regs *regs, int in_syscall)
if (test_thread_flag(TIF_SIGPENDING))
do_signal(regs, in_syscall);
- if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) {
+ if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME))
tracehook_notify_resume(regs);
- if (current->replacement_session_keyring)
- key_replace_session_keyring();
- }
}
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index c38a265846d..eb365d6795f 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -92,6 +92,8 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
int code = SEGV_MAPERR;
int is_write = error_code & ESR_S;
int fault;
+ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
+ (is_write ? FAULT_FLAG_WRITE : 0);
regs->ear = address;
regs->esr = error_code;
@@ -138,6 +140,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
if (kernel_mode(regs) && !search_exception_tables(regs->pc))
goto bad_area_nosemaphore;
+retry:
down_read(&mm->mmap_sem);
}
@@ -210,7 +213,11 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, is_write ? FAULT_FLAG_WRITE : 0);
+ fault = handle_mm_fault(mm, vma, address, flags);
+
+ if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+ return;
+
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
@@ -218,11 +225,27 @@ good_area:
goto do_sigbus;
BUG();
}
- if (unlikely(fault & VM_FAULT_MAJOR))
- current->maj_flt++;
- else
- current->min_flt++;
+
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (unlikely(fault & VM_FAULT_MAJOR))
+ current->maj_flt++;
+ else
+ current->min_flt++;
+ if (fault & VM_FAULT_RETRY) {
+ flags &= ~FAULT_FLAG_ALLOW_RETRY;
+
+ /*
+ * No need to up_read(&mm->mmap_sem) as we would
+ * have already released it in __lock_page_or_retry
+ * in mm/filemap.c.
+ */
+
+ goto retry;
+ }
+ }
+
up_read(&mm->mmap_sem);
+
/*
* keep track of tlb+htab misses that are good addrs but
* just need pte's created via handle_mm_fault()
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-02-16 02:19:47 +0000