diff options
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/Kconfig.common | 1 | ||||
| -rw-r--r-- | arch/um/Kconfig.net | 2 | ||||
| -rw-r--r-- | arch/um/Kconfig.um | 2 | ||||
| -rw-r--r-- | arch/um/Kconfig.x86 | 9 | ||||
| -rw-r--r-- | arch/um/drivers/line.c | 4 | ||||
| -rw-r--r-- | arch/um/drivers/mconsole_kern.c | 21 | ||||
| -rw-r--r-- | arch/um/drivers/ubd_kern.c | 2 | ||||
| -rw-r--r-- | arch/um/include/asm/bug.h | 6 | ||||
| -rw-r--r-- | arch/um/include/asm/common.lds.S | 2 | ||||
| -rw-r--r-- | arch/um/include/asm/processor-generic.h | 2 | ||||
| -rw-r--r-- | arch/um/include/asm/thread_info.h | 5 | ||||
| -rw-r--r-- | arch/um/include/shared/line.h | 4 | ||||
| -rw-r--r-- | arch/um/kernel/irq.c | 72 | ||||
| -rw-r--r-- | arch/um/sys-i386/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/sys-i386/asm/elf.h | 2 | ||||
| -rw-r--r-- | arch/um/sys-i386/atomic64_cx8_32.S | 225 | ||||
| -rw-r--r-- | arch/um/sys-ppc/Makefile | 10 | ||||
| -rw-r--r-- | arch/um/sys-x86_64/asm/elf.h | 2 |
18 files changed, 278 insertions, 95 deletions
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common index e351e14..a923483 100644 --- a/arch/um/Kconfig.common +++ b/arch/um/Kconfig.common @@ -7,6 +7,7 @@ config UML bool default y select HAVE_GENERIC_HARDIRQS + select GENERIC_IRQ_SHOW config MMU bool diff --git a/arch/um/Kconfig.net b/arch/um/Kconfig.net index 9e9a4aa..3160b1a 100644 --- a/arch/um/Kconfig.net +++ b/arch/um/Kconfig.net @@ -186,7 +186,7 @@ config UML_NET_SLIRP other transports, SLiRP works without the need of root level privleges, setuid binaries, or SLIP devices on the host. This also means not every type of connection is possible, but most - situations can be accomodated with carefully crafted slirp + situations can be accommodated with carefully crafted slirp commands that can be passed along as part of the network device's setup string. The effect of this transport on the UML is similar that of a host behind a firewall that masquerades all network diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um index 90a438a..b5e675e 100644 --- a/arch/um/Kconfig.um +++ b/arch/um/Kconfig.um @@ -47,7 +47,7 @@ config HOSTFS config HPPFS tristate "HoneyPot ProcFS (EXPERIMENTAL)" - depends on EXPERIMENTAL + depends on EXPERIMENTAL && PROC_FS help hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc entries to be overridden, removed, or fabricated from the host. diff --git a/arch/um/Kconfig.x86 b/arch/um/Kconfig.x86 index 5ee3280..a9da516 100644 --- a/arch/um/Kconfig.x86 +++ b/arch/um/Kconfig.x86 @@ -4,12 +4,18 @@ menu "UML-specific options" menu "Host processor type and features" +config CMPXCHG_LOCAL + bool + default n + source "arch/x86/Kconfig.cpu" endmenu config UML_X86 def_bool y + select GENERIC_FIND_FIRST_BIT + select GENERIC_FIND_NEXT_BIT config 64BIT bool @@ -19,6 +25,9 @@ config X86_32 def_bool !64BIT select HAVE_AOUT +config X86_64 + def_bool 64BIT + config RWSEM_XCHGADD_ALGORITHM def_bool X86_XADD diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 050e4dd..35dd0b8 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -255,8 +255,8 @@ static const struct { { KDSIGACCEPT, KERN_INFO, "KDSIGACCEPT" }, }; -int line_ioctl(struct tty_struct *tty, struct file * file, - unsigned int cmd, unsigned long arg) +int line_ioctl(struct tty_struct *tty, unsigned int cmd, + unsigned long arg) { int ret; int i; diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index 975613b..c70e047 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -124,35 +124,18 @@ void mconsole_log(struct mc_request *req) #if 0 void mconsole_proc(struct mc_request *req) { - struct nameidata nd; struct vfsmount *mnt = current->nsproxy->pid_ns->proc_mnt; struct file *file; - int n, err; + int n; char *ptr = req->request.data, *buf; mm_segment_t old_fs = get_fs(); ptr += strlen("proc"); ptr = skip_spaces(ptr); - err = vfs_path_lookup(mnt->mnt_root, mnt, ptr, LOOKUP_FOLLOW, &nd); - if (err) { - mconsole_reply(req, "Failed to look up file", 1, 0); - goto out; - } - - err = may_open(&nd.path, MAY_READ, O_RDONLY); - if (result) { - mconsole_reply(req, "Failed to open file", 1, 0); - path_put(&nd.path); - goto out; - } - - file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY, - current_cred()); - err = PTR_ERR(file); + file = file_open_root(mnt->mnt_root, mnt, ptr, O_RDONLY); if (IS_ERR(file)) { mconsole_reply(req, "Failed to open file", 1, 0); - path_put(&nd.path); goto out; } diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index ba4a98b..620f5b7 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -185,7 +185,7 @@ struct ubd { .no_cow = 0, \ .shared = 0, \ .cow = DEFAULT_COW, \ - .lock = SPIN_LOCK_UNLOCKED, \ + .lock = __SPIN_LOCK_UNLOCKED(ubd_devs.lock), \ .request = NULL, \ .start_sg = 0, \ .end_sg = 0, \ diff --git a/arch/um/include/asm/bug.h b/arch/um/include/asm/bug.h new file mode 100644 index 0000000..9e33b86 --- /dev/null +++ b/arch/um/include/asm/bug.h @@ -0,0 +1,6 @@ +#ifndef __UM_BUG_H +#define __UM_BUG_H + +#include <asm-generic/bug.h> + +#endif diff --git a/arch/um/include/asm/common.lds.S b/arch/um/include/asm/common.lds.S index ac55b9e..34bede8 100644 --- a/arch/um/include/asm/common.lds.S +++ b/arch/um/include/asm/common.lds.S @@ -42,7 +42,7 @@ INIT_SETUP(0) } - PERCPU(32) + PERCPU(32, 32) .initcall.init : { INIT_CALLS diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h index bed6688..d1d1b0d 100644 --- a/arch/um/include/asm/processor-generic.h +++ b/arch/um/include/asm/processor-generic.h @@ -66,7 +66,7 @@ struct thread_struct { .request = { 0 } \ } -extern struct task_struct *alloc_task_struct(void); +extern struct task_struct *alloc_task_struct_node(int node); static inline void release_thread(struct task_struct *task) { diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h index e2cf786bd..5bd1bad 100644 --- a/arch/um/include/asm/thread_info.h +++ b/arch/um/include/asm/thread_info.h @@ -49,7 +49,10 @@ static inline struct thread_info *current_thread_info(void) { struct thread_info *ti; unsigned long mask = THREAD_SIZE - 1; - ti = (struct thread_info *) (((unsigned long) &ti) & ~mask); + void *p; + + asm volatile ("" : "=r" (p) : "0" (&ti)); + ti = (struct thread_info *) (((unsigned long)p) & ~mask); return ti; } diff --git a/arch/um/include/shared/line.h b/arch/um/include/shared/line.h index 311a0d3..72f4f25 100644 --- a/arch/um/include/shared/line.h +++ b/arch/um/include/shared/line.h @@ -77,8 +77,8 @@ extern int line_chars_in_buffer(struct tty_struct *tty); extern void line_flush_buffer(struct tty_struct *tty); extern void line_flush_chars(struct tty_struct *tty); extern int line_write_room(struct tty_struct *tty); -extern int line_ioctl(struct tty_struct *tty, struct file * file, - unsigned int cmd, unsigned long arg); +extern int line_ioctl(struct tty_struct *tty, unsigned int cmd, + unsigned long arg); extern void line_throttle(struct tty_struct *tty); extern void line_unthrottle(struct tty_struct *tty); diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 3f0ac9e..9e485c7 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -18,50 +18,6 @@ #include "os.h" /* - * Generic, controller-independent functions: - */ - -int show_interrupts(struct seq_file *p, void *v) -{ - int i = *(loff_t *) v, j; - struct irqaction * action; - unsigned long flags; - - if (i == 0) { - seq_printf(p, " "); - for_each_online_cpu(j) - seq_printf(p, "CPU%d ",j); - seq_putc(p, '\n'); - } - - if (i < NR_IRQS) { - raw_spin_lock_irqsave(&irq_desc[i].lock, flags); - action = irq_desc[i].action; - if (!action) - goto skip; - seq_printf(p, "%3d: ",i); -#ifndef CONFIG_SMP - seq_printf(p, "%10u ", kstat_irqs(i)); -#else - for_each_online_cpu(j) - seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); -#endif - seq_printf(p, " %14s", irq_desc[i].chip->name); - seq_printf(p, " %s", action->name); - - for (action=action->next; action; action = action->next) - seq_printf(p, ", %s", action->name); - - seq_putc(p, '\n'); -skip: - raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); - } else if (i == NR_IRQS) - seq_putc(p, '\n'); - - return 0; -} - -/* * This list is accessed under irq_lock, except in sigio_handler, * where it is safe from being modified. IRQ handlers won't change it - * if an IRQ source has vanished, it will be freed by free_irqs just @@ -360,10 +316,10 @@ EXPORT_SYMBOL(um_request_irq); EXPORT_SYMBOL(reactivate_fd); /* - * irq_chip must define (startup || enable) && - * (shutdown || disable) && end + * irq_chip must define at least enable/disable and ack when + * the edge handler is used. */ -static void dummy(unsigned int irq) +static void dummy(struct irq_data *d) { } @@ -371,31 +327,27 @@ static void dummy(unsigned int irq) static struct irq_chip normal_irq_type = { .name = "SIGIO", .release = free_irq_by_irq_and_dev, - .disable = dummy, - .enable = dummy, - .ack = dummy, - .end = dummy + .irq_disable = dummy, + .irq_enable = dummy, + .irq_ack = dummy, }; static struct irq_chip SIGVTALRM_irq_type = { .name = "SIGVTALRM", .release = free_irq_by_irq_and_dev, - .shutdown = dummy, /* never called */ - .disable = dummy, - .enable = dummy, - .ack = dummy, - .end = dummy + .irq_disable = dummy, + .irq_enable = dummy, + .irq_ack = dummy, }; void __init init_IRQ(void) { int i; - set_irq_chip_and_handler(TIMER_IRQ, &SIGVTALRM_irq_type, handle_edge_irq); + irq_set_chip_and_handler(TIMER_IRQ, &SIGVTALRM_irq_type, handle_edge_irq); - for (i = 1; i < NR_IRQS; i++) { - set_irq_chip_and_handler(i, &normal_irq_type, handle_edge_irq); - } + for (i = 1; i < NR_IRQS; i++) + irq_set_chip_and_handler(i, &normal_irq_type, handle_edge_irq); } /* diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index 804b28d..b1da91c 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -4,7 +4,7 @@ obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \ ptrace_user.o setjmp.o signal.o stub.o stub_segv.o syscalls.o sysrq.o \ - sys_call_table.o tls.o + sys_call_table.o tls.o atomic64_cx8_32.o obj-$(CONFIG_BINFMT_ELF) += elfcore.o diff --git a/arch/um/sys-i386/asm/elf.h b/arch/um/sys-i386/asm/elf.h index a979a22..d964a41 100644 --- a/arch/um/sys-i386/asm/elf.h +++ b/arch/um/sys-i386/asm/elf.h @@ -75,6 +75,8 @@ typedef struct user_i387_struct elf_fpregset_t; pr_reg[16] = PT_REGS_SS(regs); \ } while (0); +#define task_pt_regs(t) (&(t)->thread.regs) + struct task_struct; extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu); diff --git a/arch/um/sys-i386/atomic64_cx8_32.S b/arch/um/sys-i386/atomic64_cx8_32.S new file mode 100644 index 0000000..1e901d3 --- /dev/null +++ b/arch/um/sys-i386/atomic64_cx8_32.S @@ -0,0 +1,225 @@ +/* + * atomic64_t for 586+ + * + * Copied from arch/x86/lib/atomic64_cx8_32.S + * + * Copyright © 2010 Luca Barbieri + * + * 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. + * + */ + +#include <linux/linkage.h> +#include <asm/alternative-asm.h> +#include <asm/dwarf2.h> + +.macro SAVE reg + pushl_cfi %\reg + CFI_REL_OFFSET \reg, 0 +.endm + +.macro RESTORE reg + popl_cfi %\reg + CFI_RESTORE \reg +.endm + +.macro read64 reg + movl %ebx, %eax + movl %ecx, %edx +/* we need LOCK_PREFIX since otherwise cmpxchg8b always does the write */ + LOCK_PREFIX + cmpxchg8b (\reg) +.endm + +ENTRY(atomic64_read_cx8) + CFI_STARTPROC + + read64 %ecx + ret + CFI_ENDPROC +ENDPROC(atomic64_read_cx8) + +ENTRY(atomic64_set_cx8) + CFI_STARTPROC + +1: +/* we don't need LOCK_PREFIX since aligned 64-bit writes + * are atomic on 586 and newer */ + cmpxchg8b (%esi) + jne 1b + + ret + CFI_ENDPROC +ENDPROC(atomic64_set_cx8) + +ENTRY(atomic64_xchg_cx8) + CFI_STARTPROC + + movl %ebx, %eax + movl %ecx, %edx +1: + LOCK_PREFIX + cmpxchg8b (%esi) + jne 1b + + ret + CFI_ENDPROC +ENDPROC(atomic64_xchg_cx8) + +.macro addsub_return func ins insc +ENTRY(atomic64_\func\()_return_cx8) + CFI_STARTPROC + SAVE ebp + SAVE ebx + SAVE esi + SAVE edi + + movl %eax, %esi + movl %edx, %edi + movl %ecx, %ebp + + read64 %ebp +1: + movl %eax, %ebx + movl %edx, %ecx + \ins\()l %esi, %ebx + \insc\()l %edi, %ecx + LOCK_PREFIX + cmpxchg8b (%ebp) + jne 1b + +10: + movl %ebx, %eax + movl %ecx, %edx + RESTORE edi + RESTORE esi + RESTORE ebx + RESTORE ebp + ret + CFI_ENDPROC +ENDPROC(atomic64_\func\()_return_cx8) +.endm + +addsub_return add add adc +addsub_return sub sub sbb + +.macro incdec_return func ins insc +ENTRY(atomic64_\func\()_return_cx8) + CFI_STARTPROC + SAVE ebx + + read64 %esi +1: + movl %eax, %ebx + movl %edx, %ecx + \ins\()l $1, %ebx + \insc\()l $0, %ecx + LOCK_PREFIX + cmpxchg8b (%esi) + jne 1b + +10: + movl %ebx, %eax + movl %ecx, %edx + RESTORE ebx + ret + CFI_ENDPROC +ENDPROC(atomic64_\func\()_return_cx8) +.endm + +incdec_return inc add adc +incdec_return dec sub sbb + +ENTRY(atomic64_dec_if_positive_cx8) + CFI_STARTPROC + SAVE ebx + + read64 %esi +1: + movl %eax, %ebx + movl %edx, %ecx + subl $1, %ebx + sbb $0, %ecx + js 2f + LOCK_PREFIX + cmpxchg8b (%esi) + jne 1b + +2: + movl %ebx, %eax + movl %ecx, %edx + RESTORE ebx + ret + CFI_ENDPROC +ENDPROC(atomic64_dec_if_positive_cx8) + +ENTRY(atomic64_add_unless_cx8) + CFI_STARTPROC + SAVE ebp + SAVE ebx +/* these just push these two parameters on the stack */ + SAVE edi + SAVE esi + + movl %ecx, %ebp + movl %eax, %esi + movl %edx, %edi + + read64 %ebp +1: + cmpl %eax, 0(%esp) + je 4f +2: + movl %eax, %ebx + movl %edx, %ecx + addl %esi, %ebx + adcl %edi, %ecx + LOCK_PREFIX + cmpxchg8b (%ebp) + jne 1b + + movl $1, %eax +3: + addl $8, %esp + CFI_ADJUST_CFA_OFFSET -8 + RESTORE ebx + RESTORE ebp + ret +4: + cmpl %edx, 4(%esp) + jne 2b + xorl %eax, %eax + jmp 3b + CFI_ENDPROC +ENDPROC(atomic64_add_unless_cx8) + +ENTRY(atomic64_inc_not_zero_cx8) + CFI_STARTPROC + SAVE ebx + + read64 %esi +1: + testl %eax, %eax + je 4f +2: + movl %eax, %ebx + movl %edx, %ecx + addl $1, %ebx + adcl $0, %ecx + LOCK_PREFIX + cmpxchg8b (%esi) + jne 1b + + movl $1, %eax +3: + RESTORE ebx + ret +4: + testl %edx, %edx + jne 2b + jmp 3b + CFI_ENDPROC +ENDPROC(atomic64_inc_not_zero_cx8) diff --git a/arch/um/sys-ppc/Makefile b/arch/um/sys-ppc/Makefile index b8bc844..20d363b 100644 --- a/arch/um/sys-ppc/Makefile +++ b/arch/um/sys-ppc/Makefile @@ -6,7 +6,7 @@ OBJ = built-in.o OBJS = ptrace.o sigcontext.o checksum.o miscthings.o misc.o \ ptrace_user.o sysrq.o -EXTRA_AFLAGS := -DCONFIG_PPC32 -I. -I$(srctree)/arch/ppc/kernel +asflags-y := -DCONFIG_PPC32 -I. -I$(srctree)/arch/ppc/kernel all: $(OBJ) @@ -15,10 +15,10 @@ $(OBJ): $(OBJS) $(LD) $(LINKFLAGS) --start-group $^ --end-group -o $@ ptrace_user.o: ptrace_user.c - $(CC) -D__KERNEL__ $(USER_CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $< + $(CC) -D__KERNEL__ $(USER_CFLAGS) $(ccflags-y) -c -o $@ $< sigcontext.o: sigcontext.c - $(CC) $(USER_CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $< + $(CC) $(USER_CFLAGS) $(ccflags-y) -c -o $@ $< checksum.S: rm -f $@ @@ -53,13 +53,13 @@ ppc_defs.h: mk_defs.c ppc_defs.head \ checksum.o: checksum.S rm -f asm ln -s $(srctree)/include/asm-ppc asm - $(CC) $(EXTRA_AFLAGS) $(KBUILD_AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o + $(CC) $(asflags-y) $(KBUILD_AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o rm -f asm misc.o: misc.S ppc_defs.h rm -f asm ln -s $(srctree)/include/asm-ppc asm - $(CC) $(EXTRA_AFLAGS) $(KBUILD_AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o + $(CC) $(asflags-y) $(KBUILD_AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o rm -f asm clean-files := $(OBJS) ppc_defs.h checksum.S mk_defs.c diff --git a/arch/um/sys-x86_64/asm/elf.h b/arch/um/sys-x86_64/asm/elf.h index d760967f..d6d5af3 100644 --- a/arch/um/sys-x86_64/asm/elf.h +++ b/arch/um/sys-x86_64/asm/elf.h @@ -95,6 +95,8 @@ typedef struct user_i387_struct elf_fpregset_t; (pr_reg)[25] = 0; \ (pr_reg)[26] = 0; +#define task_pt_regs(t) (&(t)->thread.regs) + struct task_struct; extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu); |
