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-rw-r--r--arch/s390/Kconfig10
-rw-r--r--arch/s390/boot/install.sh4
-rw-r--r--arch/s390/defconfig1
-rw-r--r--arch/s390/kernel/Makefile10
-rw-r--r--arch/s390/kernel/compat_ioctl.c6
-rw-r--r--arch/s390/kernel/compat_linux.h2
-rw-r--r--arch/s390/kernel/compat_wrapper.S8
-rw-r--r--arch/s390/kernel/cpcmd.c109
-rw-r--r--arch/s390/kernel/crash.c17
-rw-r--r--arch/s390/kernel/debug.c820
-rw-r--r--arch/s390/kernel/entry.S102
-rw-r--r--arch/s390/kernel/entry64.S97
-rw-r--r--arch/s390/kernel/head.S27
-rw-r--r--arch/s390/kernel/head64.S25
-rw-r--r--arch/s390/kernel/machine_kexec.c98
-rw-r--r--arch/s390/kernel/process.c46
-rw-r--r--arch/s390/kernel/relocate_kernel.S81
-rw-r--r--arch/s390/kernel/relocate_kernel64.S82
-rw-r--r--arch/s390/kernel/setup.c19
-rw-r--r--arch/s390/kernel/smp.c23
-rw-r--r--arch/s390/kernel/syscalls.S2
-rw-r--r--arch/s390/kernel/traps.c7
-rw-r--r--arch/s390/mm/cmm.c2
-rw-r--r--arch/s390/mm/extmem.c4
24 files changed, 1184 insertions, 418 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index ab79af84699a..6600ee87f896 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -226,6 +226,8 @@ config WARN_STACK_SIZE
This allows you to specify the maximum frame size a function may
have without the compiler complaining about it.
+source "mm/Kconfig"
+
comment "I/O subsystem configuration"
config MACHCHK_WARNING
@@ -453,6 +455,14 @@ config NO_IDLE_HZ_INIT
The HZ timer is switched off in idle by default. That means the
HZ timer is already disabled at boot time.
+config KEXEC
+ bool "kexec system call (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ help
+ kexec is a system call that implements the ability to shutdown your
+ current kernel, and to start another kernel. It is like a reboot
+ but is independent of hardware/microcode support.
+
endmenu
config PCMCIA
diff --git a/arch/s390/boot/install.sh b/arch/s390/boot/install.sh
index 278a8139cb18..d4026f62cb06 100644
--- a/arch/s390/boot/install.sh
+++ b/arch/s390/boot/install.sh
@@ -21,8 +21,8 @@
# User may have a custom install script
-if [ -x ~/bin/installkernel ]; then exec ~/bin/installkernel "$@"; fi
-if [ -x /sbin/installkernel ]; then exec /sbin/installkernel "$@"; fi
+if [ -x ~/bin/${CROSS_COMPILE}installkernel ]; then exec ~/bin/${CROSS_COMPILE}installkernel "$@"; fi
+if [ -x /sbin/${CROSS_COMPILE}installkernel ]; then exec /sbin/${CROSS_COMPILE}installkernel "$@"; fi
# Default install - same as make zlilo
diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index 07fd0414a4bf..89850b2c27ea 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -245,6 +245,7 @@ CONFIG_S390_TAPE_BLOCK=y
#
CONFIG_S390_TAPE_34XX=m
# CONFIG_VMLOGRDR is not set
+# CONFIG_VMCP is not set
# CONFIG_MONREADER is not set
# CONFIG_DCSS_SHM is not set
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index b41e0e199a7c..ab1e49d2e518 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -25,6 +25,16 @@ obj-$(CONFIG_ARCH_S390X) += entry64.o reipl64.o
obj-$(CONFIG_VIRT_TIMER) += vtime.o
+# Kexec part
+S390_KEXEC_OBJS := machine_kexec.o crash.o
+ifeq ($(CONFIG_ARCH_S390X),y)
+S390_KEXEC_OBJS += relocate_kernel64.o
+else
+S390_KEXEC_OBJS += relocate_kernel.o
+endif
+obj-$(CONFIG_KEXEC) += $(S390_KEXEC_OBJS)
+
+
#
# This is just to get the dependencies...
#
diff --git a/arch/s390/kernel/compat_ioctl.c b/arch/s390/kernel/compat_ioctl.c
index 03d03c6d3cbb..24a1e9f069a7 100644
--- a/arch/s390/kernel/compat_ioctl.c
+++ b/arch/s390/kernel/compat_ioctl.c
@@ -42,7 +42,6 @@ struct ioctl_trans ioctl_start[] = {
#include "../../../fs/compat_ioctl.c"
/* s390 only ioctls */
-#if defined(CONFIG_DASD) || defined(CONFIG_DASD_MODULE)
COMPATIBLE_IOCTL(DASDAPIVER)
COMPATIBLE_IOCTL(BIODASDDISABLE)
COMPATIBLE_IOCTL(BIODASDENABLE)
@@ -59,16 +58,11 @@ COMPATIBLE_IOCTL(BIODASDPRRD)
COMPATIBLE_IOCTL(BIODASDPSRD)
COMPATIBLE_IOCTL(BIODASDGATTR)
COMPATIBLE_IOCTL(BIODASDSATTR)
-#if defined(CONFIG_DASD_CMB) || defined(CONFIG_DASD_CMB_MODULE)
COMPATIBLE_IOCTL(BIODASDCMFENABLE)
COMPATIBLE_IOCTL(BIODASDCMFDISABLE)
COMPATIBLE_IOCTL(BIODASDREADALLCMB)
-#endif
-#endif
-#if defined(CONFIG_S390_TAPE) || defined(CONFIG_S390_TAPE_MODULE)
COMPATIBLE_IOCTL(TAPE390_DISPLAY)
-#endif
/* s390 doesn't need handlers here */
COMPATIBLE_IOCTL(TIOCGSERIAL)
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index bf33dcfec7db..3898f66d0b2f 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -45,7 +45,7 @@ typedef struct compat_siginfo {
/* POSIX.1b timers */
struct {
- timer_t _tid; /* timer id */
+ compat_timer_t _tid; /* timer id */
int _overrun; /* overrun count */
compat_sigval_t _sigval; /* same as below */
int _sys_private; /* not to be passed to user */
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 7a607b1d0380..bf529739c8ab 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1441,3 +1441,11 @@ compat_sys_waitid_wrapper:
lgfr %r5,%r5 # int
llgtr %r6,%r6 # struct rusage_emu31 *
jg compat_sys_waitid
+
+ .globl compat_sys_kexec_load_wrapper
+compat_sys_kexec_load_wrapper:
+ llgfr %r2,%r2 # unsigned long
+ llgfr %r3,%r3 # unsigned long
+ llgtr %r4,%r4 # struct kexec_segment *
+ llgfr %r5,%r5 # unsigned long
+ jg compat_sys_kexec_load
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c
index 44df8dc07c59..20062145e84e 100644
--- a/arch/s390/kernel/cpcmd.c
+++ b/arch/s390/kernel/cpcmd.c
@@ -2,7 +2,7 @@
* arch/s390/kernel/cpcmd.c
*
* S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright (C) 1999,2005 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Christian Borntraeger (cborntra@de.ibm.com),
*/
@@ -18,93 +18,114 @@
#include <asm/system.h>
static DEFINE_SPINLOCK(cpcmd_lock);
-static char cpcmd_buf[240];
+static char cpcmd_buf[241];
/*
* the caller of __cpcmd has to ensure that the response buffer is below 2 GB
*/
-void __cpcmd(char *cmd, char *response, int rlen)
+int __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
{
const int mask = 0x40000000L;
unsigned long flags;
+ int return_code;
+ int return_len;
int cmdlen;
spin_lock_irqsave(&cpcmd_lock, flags);
cmdlen = strlen(cmd);
BUG_ON(cmdlen > 240);
- strcpy(cpcmd_buf, cmd);
+ memcpy(cpcmd_buf, cmd, cmdlen);
ASCEBC(cpcmd_buf, cmdlen);
if (response != NULL && rlen > 0) {
memset(response, 0, rlen);
#ifndef CONFIG_ARCH_S390X
- asm volatile ("LRA 2,0(%0)\n\t"
- "LR 4,%1\n\t"
- "O 4,%4\n\t"
- "LRA 3,0(%2)\n\t"
- "LR 5,%3\n\t"
- ".long 0x83240008 # Diagnose X'08'\n\t"
- : /* no output */
- : "a" (cpcmd_buf), "d" (cmdlen),
- "a" (response), "d" (rlen), "m" (mask)
- : "cc", "2", "3", "4", "5" );
+ asm volatile ( "lra 2,0(%2)\n"
+ "lr 4,%3\n"
+ "o 4,%6\n"
+ "lra 3,0(%4)\n"
+ "lr 5,%5\n"
+ "diag 2,4,0x8\n"
+ "brc 8, .Litfits\n"
+ "ar 5, %5\n"
+ ".Litfits: \n"
+ "lr %0,4\n"
+ "lr %1,5\n"
+ : "=d" (return_code), "=d" (return_len)
+ : "a" (cpcmd_buf), "d" (cmdlen),
+ "a" (response), "d" (rlen), "m" (mask)
+ : "cc", "2", "3", "4", "5" );
#else /* CONFIG_ARCH_S390X */
- asm volatile (" lrag 2,0(%0)\n"
- " lgr 4,%1\n"
- " o 4,%4\n"
- " lrag 3,0(%2)\n"
- " lgr 5,%3\n"
- " sam31\n"
- " .long 0x83240008 # Diagnose X'08'\n"
- " sam64"
- : /* no output */
- : "a" (cpcmd_buf), "d" (cmdlen),
- "a" (response), "d" (rlen), "m" (mask)
- : "cc", "2", "3", "4", "5" );
+ asm volatile ( "lrag 2,0(%2)\n"
+ "lgr 4,%3\n"
+ "o 4,%6\n"
+ "lrag 3,0(%4)\n"
+ "lgr 5,%5\n"
+ "sam31\n"
+ "diag 2,4,0x8\n"
+ "sam64\n"
+ "brc 8, .Litfits\n"
+ "agr 5, %5\n"
+ ".Litfits: \n"
+ "lgr %0,4\n"
+ "lgr %1,5\n"
+ : "=d" (return_code), "=d" (return_len)
+ : "a" (cpcmd_buf), "d" (cmdlen),
+ "a" (response), "d" (rlen), "m" (mask)
+ : "cc", "2", "3", "4", "5" );
#endif /* CONFIG_ARCH_S390X */
EBCASC(response, rlen);
} else {
+ return_len = 0;
#ifndef CONFIG_ARCH_S390X
- asm volatile ("LRA 2,0(%0)\n\t"
- "LR 3,%1\n\t"
- ".long 0x83230008 # Diagnose X'08'\n\t"
- : /* no output */
- : "a" (cpcmd_buf), "d" (cmdlen)
- : "2", "3" );
+ asm volatile ( "lra 2,0(%1)\n"
+ "lr 3,%2\n"
+ "diag 2,3,0x8\n"
+ "lr %0,3\n"
+ : "=d" (return_code)
+ : "a" (cpcmd_buf), "d" (cmdlen)
+ : "2", "3" );
#else /* CONFIG_ARCH_S390X */
- asm volatile (" lrag 2,0(%0)\n"
- " lgr 3,%1\n"
- " sam31\n"
- " .long 0x83230008 # Diagnose X'08'\n"
- " sam64"
- : /* no output */
- : "a" (cpcmd_buf), "d" (cmdlen)
- : "2", "3" );
+ asm volatile ( "lrag 2,0(%1)\n"
+ "lgr 3,%2\n"
+ "sam31\n"
+ "diag 2,3,0x8\n"
+ "sam64\n"
+ "lgr %0,3\n"
+ : "=d" (return_code)
+ : "a" (cpcmd_buf), "d" (cmdlen)
+ : "2", "3" );
#endif /* CONFIG_ARCH_S390X */
}
spin_unlock_irqrestore(&cpcmd_lock, flags);
+ if (response_code != NULL)
+ *response_code = return_code;
+ return return_len;
}
EXPORT_SYMBOL(__cpcmd);
#ifdef CONFIG_ARCH_S390X
-void cpcmd(char *cmd, char *response, int rlen)
+int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
{
char *lowbuf;
+ int len;
+
if ((rlen == 0) || (response == NULL)
|| !((unsigned long)response >> 31))
- __cpcmd(cmd, response, rlen);
+ len = __cpcmd(cmd, response, rlen, response_code);
else {
lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
if (!lowbuf) {
printk(KERN_WARNING
"cpcmd: could not allocate response buffer\n");
- return;
+ return -ENOMEM;
}
- __cpcmd(cmd, lowbuf, rlen);
+ len = __cpcmd(cmd, lowbuf, rlen, response_code);
memcpy(response, lowbuf, rlen);
kfree(lowbuf);
}
+ return len;
}
EXPORT_SYMBOL(cpcmd);
diff --git a/arch/s390/kernel/crash.c b/arch/s390/kernel/crash.c
new file mode 100644
index 000000000000..7bd169c58b0c
--- /dev/null
+++ b/arch/s390/kernel/crash.c
@@ -0,0 +1,17 @@
+/*
+ * arch/s390/kernel/crash.c
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ *
+ */
+
+#include <linux/threads.h>
+#include <linux/kexec.h>
+
+note_buf_t crash_notes[NR_CPUS];
+
+void machine_crash_shutdown(struct pt_regs *regs)
+{
+}
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 91f8ce5543d3..960ba6029c3a 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -19,22 +19,27 @@
#include <linux/sysctl.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
-
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/debugfs.h>
#include <asm/debug.h>
#define DEBUG_PROLOG_ENTRY -1
+#define ALL_AREAS 0 /* copy all debug areas */
+#define NO_AREAS 1 /* copy no debug areas */
+
/* typedefs */
typedef struct file_private_info {
loff_t offset; /* offset of last read in file */
int act_area; /* number of last formated area */
+ int act_page; /* act page in given area */
int act_entry; /* last formated entry (offset */
/* relative to beginning of last */
- /* formated area) */
+ /* formated page) */
size_t act_entry_offset; /* up to this offset we copied */
/* in last read the last formated */
/* entry to userland */
@@ -51,8 +56,8 @@ typedef struct
* This assumes that all args are converted into longs
* on L/390 this is the case for all types of parameter
* except of floats, and long long (32 bit)
- *
- */
+ *
+ */
long args[0];
} debug_sprintf_entry_t;
@@ -63,32 +68,38 @@ extern void tod_to_timeval(uint64_t todval, struct timeval *xtime);
static int debug_init(void);
static ssize_t debug_output(struct file *file, char __user *user_buf,
- size_t user_len, loff_t * offset);
+ size_t user_len, loff_t * offset);
static ssize_t debug_input(struct file *file, const char __user *user_buf,
- size_t user_len, loff_t * offset);
+ size_t user_len, loff_t * offset);
static int debug_open(struct inode *inode, struct file *file);
static int debug_close(struct inode *inode, struct file *file);
-static debug_info_t* debug_info_create(char *name, int page_order, int nr_areas, int buf_size);
+static debug_info_t* debug_info_create(char *name, int pages_per_area,
+ int nr_areas, int buf_size);
static void debug_info_get(debug_info_t *);
static void debug_info_put(debug_info_t *);
static int debug_prolog_level_fn(debug_info_t * id,
- struct debug_view *view, char *out_buf);
+ struct debug_view *view, char *out_buf);
static int debug_input_level_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t user_buf_size, loff_t * offset);
+ struct file *file, const char __user *user_buf,
+ size_t user_buf_size, loff_t * offset);
+static int debug_prolog_pages_fn(debug_info_t * id,
+ struct debug_view *view, char *out_buf);
+static int debug_input_pages_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_buf_size, loff_t * offset);
static int debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t user_buf_size, loff_t * offset);
+ struct file *file, const char __user *user_buf,
+ size_t user_buf_size, loff_t * offset);
static int debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, const char *in_buf);
+ char *out_buf, const char *in_buf);
static int debug_raw_format_fn(debug_info_t * id,
- struct debug_view *view, char *out_buf,
- const char *in_buf);
+ struct debug_view *view, char *out_buf,
+ const char *in_buf);
static int debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
- int area, debug_entry_t * entry, char *out_buf);
+ int area, debug_entry_t * entry, char *out_buf);
static int debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, debug_sprintf_entry_t *curr_event);
+ char *out_buf, debug_sprintf_entry_t *curr_event);
/* globals */
@@ -119,6 +130,15 @@ struct debug_view debug_level_view = {
NULL
};
+struct debug_view debug_pages_view = {
+ "pages",
+ &debug_prolog_pages_fn,
+ NULL,
+ NULL,
+ &debug_input_pages_fn,
+ NULL
+};
+
struct debug_view debug_flush_view = {
"flush",
NULL,
@@ -149,98 +169,161 @@ DECLARE_MUTEX(debug_lock);
static int initialized;
static struct file_operations debug_file_ops = {
- .owner = THIS_MODULE,
+ .owner = THIS_MODULE,
.read = debug_output,
- .write = debug_input,
+ .write = debug_input,
.open = debug_open,
.release = debug_close,
};
-static struct proc_dir_entry *debug_proc_root_entry;
+static struct dentry *debug_debugfs_root_entry;
/* functions */
/*
+ * debug_areas_alloc
+ * - Debug areas are implemented as a threedimensonal array:
+ * areas[areanumber][pagenumber][pageoffset]
+ */
+
+static debug_entry_t***
+debug_areas_alloc(int pages_per_area, int nr_areas)
+{
+ debug_entry_t*** areas;
+ int i,j;
+
+ areas = (debug_entry_t ***) kmalloc(nr_areas *
+ sizeof(debug_entry_t**),
+ GFP_KERNEL);
+ if (!areas)
+ goto fail_malloc_areas;
+ for (i = 0; i < nr_areas; i++) {
+ areas[i] = (debug_entry_t**) kmalloc(pages_per_area *
+ sizeof(debug_entry_t*),GFP_KERNEL);
+ if (!areas[i]) {
+ goto fail_malloc_areas2;
+ }
+ for(j = 0; j < pages_per_area; j++) {
+ areas[i][j] = (debug_entry_t*)kmalloc(PAGE_SIZE,
+ GFP_KERNEL);
+ if(!areas[i][j]) {
+ for(j--; j >=0 ; j--) {
+ kfree(areas[i][j]);
+ }
+ kfree(areas[i]);
+ goto fail_malloc_areas2;
+ } else {
+ memset(areas[i][j],0,PAGE_SIZE);
+ }
+ }
+ }
+ return areas;
+
+fail_malloc_areas2:
+ for(i--; i >= 0; i--){
+ for(j=0; j < pages_per_area;j++){
+ kfree(areas[i][j]);
+ }
+ kfree(areas[i]);
+ }
+ kfree(areas);
+fail_malloc_areas:
+ return NULL;
+
+}
+
+
+/*
* debug_info_alloc
* - alloc new debug-info
*/
-static debug_info_t* debug_info_alloc(char *name, int page_order,
- int nr_areas, int buf_size)
+static debug_info_t*
+debug_info_alloc(char *name, int pages_per_area, int nr_areas, int buf_size,
+ int level, int mode)
{
debug_info_t* rc;
- int i;
/* alloc everything */
- rc = (debug_info_t*) kmalloc(sizeof(debug_info_t), GFP_ATOMIC);
+ rc = (debug_info_t*) kmalloc(sizeof(debug_info_t), GFP_KERNEL);
if(!rc)
goto fail_malloc_rc;
- rc->active_entry = (int*)kmalloc(nr_areas * sizeof(int), GFP_ATOMIC);
- if(!rc->active_entry)
- goto fail_malloc_active_entry;
- memset(rc->active_entry, 0, nr_areas * sizeof(int));
- rc->areas = (debug_entry_t **) kmalloc(nr_areas *
- sizeof(debug_entry_t *),
- GFP_ATOMIC);
- if (!rc->areas)
- goto fail_malloc_areas;
- for (i = 0; i < nr_areas; i++) {
- rc->areas[i] = (debug_entry_t *) __get_free_pages(GFP_ATOMIC,
- page_order);
- if (!rc->areas[i]) {
- for (i--; i >= 0; i--) {
- free_pages((unsigned long) rc->areas[i],
- page_order);
- }
- goto fail_malloc_areas2;
- } else {
- memset(rc->areas[i], 0, PAGE_SIZE << page_order);
- }
+ rc->active_entries = (int*)kmalloc(nr_areas * sizeof(int), GFP_KERNEL);
+ if(!rc->active_entries)
+ goto fail_malloc_active_entries;
+ memset(rc->active_entries, 0, nr_areas * sizeof(int));
+ rc->active_pages = (int*)kmalloc(nr_areas * sizeof(int), GFP_KERNEL);
+ if(!rc->active_pages)
+ goto fail_malloc_active_pages;
+ memset(rc->active_pages, 0, nr_areas * sizeof(int));
+ if((mode == ALL_AREAS) && (pages_per_area != 0)){
+ rc->areas = debug_areas_alloc(pages_per_area, nr_areas);
+ if(!rc->areas)
+ goto fail_malloc_areas;
+ } else {
+ rc->areas = NULL;
}
/* initialize members */
spin_lock_init(&rc->lock);
- rc->page_order = page_order;
- rc->nr_areas = nr_areas;
- rc->active_area = 0;
- rc->level = DEBUG_DEFAULT_LEVEL;
- rc->buf_size = buf_size;
- rc->entry_size = sizeof(debug_entry_t) + buf_size;
- strlcpy(rc->name, name, sizeof(rc->name));
+ rc->pages_per_area = pages_per_area;
+ rc->nr_areas = nr_areas;
+ rc->active_area = 0;
+ rc->level = level;
+ rc->buf_size = buf_size;
+ rc->entry_size = sizeof(debug_entry_t) + buf_size;
+ strlcpy(rc->name, name, sizeof(rc->name)-1);
memset(rc->views, 0, DEBUG_MAX_VIEWS * sizeof(struct debug_view *));
-#ifdef CONFIG_PROC_FS
- memset(rc->proc_entries, 0 ,DEBUG_MAX_VIEWS *
- sizeof(struct proc_dir_entry*));
-#endif /* CONFIG_PROC_FS */
+ memset(rc->debugfs_entries, 0 ,DEBUG_MAX_VIEWS *
+ sizeof(struct dentry*));
atomic_set(&(rc->ref_count), 0);
return rc;
-fail_malloc_areas2:
- kfree(rc->areas);
fail_malloc_areas:
- kfree(rc->active_entry);
-fail_malloc_active_entry:
+ kfree(rc->active_pages);
+fail_malloc_active_pages:
+ kfree(rc->active_entries);
+fail_malloc_active_entries:
kfree(rc);
fail_malloc_rc:
return NULL;
}
/*
- * debug_info_free
- * - free memory debug-info
+ * debug_areas_free
+ * - free all debug areas
*/
-static void debug_info_free(debug_info_t* db_info){
- int i;
+static void
+debug_areas_free(debug_info_t* db_info)
+{
+ int i,j;
+
+ if(!db_info->areas)
+ return;
for (i = 0; i < db_info->nr_areas; i++) {
- free_pages((unsigned long) db_info->areas[i],
- db_info->page_order);
+ for(j = 0; j < db_info->pages_per_area; j++) {
+ kfree(db_info->areas[i][j]);
+ }
+ kfree(db_info->areas[i]);
}
kfree(db_info->areas);
- kfree(db_info->active_entry);
+ db_info->areas = NULL;
+}
+
+/*
+ * debug_info_free
+ * - free memory debug-info
+ */
+
+static void
+debug_info_free(debug_info_t* db_info){
+ debug_areas_free(db_info);
+ kfree(db_info->active_entries);
+ kfree(db_info->active_pages);
kfree(db_info);
}
@@ -249,21 +332,22 @@ static void debug_info_free(debug_info_t* db_info){
* - create new debug-info
*/
-static debug_info_t* debug_info_create(char *name, int page_order,
- int nr_areas, int buf_size)
+static debug_info_t*
+debug_info_create(char *name, int pages_per_area, int nr_areas, int buf_size)
{
debug_info_t* rc;
- rc = debug_info_alloc(name, page_order, nr_areas, buf_size);
+ rc = debug_info_alloc(name, pages_per_area, nr_areas, buf_size,
+ DEBUG_DEFAULT_LEVEL, ALL_AREAS);
if(!rc)
goto out;
-
- /* create proc rood directory */
- rc->proc_root_entry = proc_mkdir(rc->name, debug_proc_root_entry);
+ /* create root directory */
+ rc->debugfs_root_entry = debugfs_create_dir(rc->name,
+ debug_debugfs_root_entry);
/* append new element to linked list */
- if (debug_area_first == NULL) {
+ if (!debug_area_first) {
/* first element in list */
debug_area_first = rc;
rc->prev = NULL;
@@ -285,17 +369,21 @@ out:
* - copy debug-info
*/
-static debug_info_t* debug_info_copy(debug_info_t* in)
+static debug_info_t*
+debug_info_copy(debug_info_t* in, int mode)
{
- int i;
+ int i,j;
debug_info_t* rc;
- rc = debug_info_alloc(in->name, in->page_order,
- in->nr_areas, in->buf_size);
- if(!rc)
+
+ rc = debug_info_alloc(in->name, in->pages_per_area, in->nr_areas,
+ in->buf_size, in->level, mode);
+ if(!rc || (mode == NO_AREAS))
goto out;
for(i = 0; i < in->nr_areas; i++){
- memcpy(rc->areas[i],in->areas[i], PAGE_SIZE << in->page_order);
+ for(j = 0; j < in->pages_per_area; j++) {
+ memcpy(rc->areas[i][j], in->areas[i][j],PAGE_SIZE);
+ }
}
out:
return rc;
@@ -306,7 +394,8 @@ out:
* - increments reference count for debug-info
*/
-static void debug_info_get(debug_info_t * db_info)
+static void
+debug_info_get(debug_info_t * db_info)
{
if (db_info)
atomic_inc(&db_info->ref_count);
@@ -317,29 +406,20 @@ static void debug_info_get(debug_info_t * db_info)
* - decreases reference count for debug-info and frees it if necessary
*/
-static void debug_info_put(debug_info_t *db_info)
+static void
+debug_info_put(debug_info_t *db_info)
{
int i;
if (!db_info)
return;
if (atomic_dec_and_test(&db_info->ref_count)) {
-#ifdef DEBUG
- printk(KERN_INFO "debug: freeing debug area %p (%s)\n",
- db_info, db_info->name);
-#endif
for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
- if (db_info->views[i] == NULL)
+ if (!db_info->views[i])
continue;
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(db_info->proc_entries[i]->name,
- db_info->proc_root_entry);
-#endif
+ debugfs_remove(db_info->debugfs_entries[i]);
}
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(db_info->proc_root_entry->name,
- debug_proc_root_entry);
-#endif
+ debugfs_remove(db_info->debugfs_root_entry);
if(db_info == debug_area_first)
debug_area_first = db_info->next;
if(db_info == debug_area_last)
@@ -355,9 +435,9 @@ static void debug_info_put(debug_info_t *db_info)
* - format one debug entry and return size of formated data
*/
-static int debug_format_entry(file_private_info_t *p_info)
+static int
+debug_format_entry(file_private_info_t *p_info)
{
- debug_info_t *id_org = p_info->debug_info_org;
debug_info_t *id_snap = p_info->debug_info_snap;
struct debug_view *view = p_info->view;
debug_entry_t *act_entry;
@@ -365,22 +445,23 @@ static int debug_format_entry(file_private_info_t *p_info)
if(p_info->act_entry == DEBUG_PROLOG_ENTRY){
/* print prolog */
if (view->prolog_proc)
- len += view->prolog_proc(id_org, view,p_info->temp_buf);
+ len += view->prolog_proc(id_snap,view,p_info->temp_buf);
goto out;
}
-
- act_entry = (debug_entry_t *) ((char*)id_snap->areas[p_info->act_area] +
- p_info->act_entry);
+ if (!id_snap->areas) /* this is true, if we have a prolog only view */
+ goto out; /* or if 'pages_per_area' is 0 */
+ act_entry = (debug_entry_t *) ((char*)id_snap->areas[p_info->act_area]
+ [p_info->act_page] + p_info->act_entry);
if (act_entry->id.stck == 0LL)
goto out; /* empty entry */
if (view->header_proc)
- len += view->header_proc(id_org, view, p_info->act_area,
+ len += view->header_proc(id_snap, view, p_info->act_area,
act_entry, p_info->temp_buf + len);
if (view->format_proc)
- len += view->format_proc(id_org, view, p_info->temp_buf + len,
+ len += view->format_proc(id_snap, view, p_info->temp_buf + len,
DEBUG_DATA(act_entry));
- out:
+out:
return len;
}
@@ -389,20 +470,30 @@ static int debug_format_entry(file_private_info_t *p_info)
* - goto next entry in p_info
*/
-extern inline int debug_next_entry(file_private_info_t *p_info)
+extern inline int
+debug_next_entry(file_private_info_t *p_info)
{
- debug_info_t *id = p_info->debug_info_snap;
+ debug_info_t *id;
+
+ id = p_info->debug_info_snap;
if(p_info->act_entry == DEBUG_PROLOG_ENTRY){
p_info->act_entry = 0;
+ p_info->act_page = 0;
goto out;
}
- if ((p_info->act_entry += id->entry_size)
- > ((PAGE_SIZE << (id->page_order))
- - id->entry_size)){
-
- /* next area */
+ if(!id->areas)
+ return 1;
+ p_info->act_entry += id->entry_size;
+ /* switch to next page, if we reached the end of the page */
+ if (p_info->act_entry > (PAGE_SIZE - id->entry_size)){
+ /* next page */
p_info->act_entry = 0;
- p_info->act_area++;
+ p_info->act_page += 1;
+ if((p_info->act_page % id->pages_per_area) == 0) {
+ /* next area */
+ p_info->act_area++;
+ p_info->act_page=0;
+ }
if(p_info->act_area >= id->nr_areas)
return 1;
}
@@ -416,13 +507,14 @@ out:
* - copies formated debug entries to the user buffer
*/
-static ssize_t debug_output(struct file *file, /* file descriptor */
- char __user *user_buf, /* user buffer */
- size_t len, /* length of buffer */
- loff_t *offset) /* offset in the file */
+static ssize_t
+debug_output(struct file *file, /* file descriptor */
+ char __user *user_buf, /* user buffer */
+ size_t len, /* length of buffer */
+ loff_t *offset) /* offset in the file */
{
size_t count = 0;
- size_t entry_offset, size = 0;
+ size_t entry_offset;
file_private_info_t *p_info;
p_info = ((file_private_info_t *) file->private_data);
@@ -430,27 +522,33 @@ static ssize_t debug_output(struct file *file, /* file descriptor */
return -EPIPE;
if(p_info->act_area >= p_info->debug_info_snap->nr_areas)
return 0;
-
entry_offset = p_info->act_entry_offset;
-
while(count < len){
- size = debug_format_entry(p_info);
- size = min((len - count), (size - entry_offset));
-
- if(size){
- if (copy_to_user(user_buf + count,
- p_info->temp_buf + entry_offset, size))
- return -EFAULT;
+ int formatted_line_size;
+ int formatted_line_residue;
+ int user_buf_residue;
+ size_t copy_size;
+
+ formatted_line_size = debug_format_entry(p_info);
+ formatted_line_residue = formatted_line_size - entry_offset;
+ user_buf_residue = len-count;
+ copy_size = min(user_buf_residue, formatted_line_residue);
+ if(copy_size){
+ if (copy_to_user(user_buf + count, p_info->temp_buf
+ + entry_offset, copy_size))
+ return -EFAULT;
+ count += copy_size;
+ entry_offset += copy_size;
}
- count += size;
- entry_offset = 0;
- if(count != len)
- if(debug_next_entry(p_info))
+ if(copy_size == formatted_line_residue){
+ entry_offset = 0;
+ if(debug_next_entry(p_info))
goto out;
+ }
}
out:
p_info->offset = *offset + count;
- p_info->act_entry_offset = size;
+ p_info->act_entry_offset = entry_offset;
*offset = p_info->offset;
return count;
}
@@ -461,9 +559,9 @@ out:
* - calls input function of view
*/
-static ssize_t debug_input(struct file *file,
- const char __user *user_buf, size_t length,
- loff_t *offset)
+static ssize_t
+debug_input(struct file *file, const char __user *user_buf, size_t length,
+ loff_t *offset)
{
int rc = 0;
file_private_info_t *p_info;
@@ -487,26 +585,23 @@ static ssize_t debug_input(struct file *file,
* handle
*/
-static int debug_open(struct inode *inode, struct file *file)
+static int
+debug_open(struct inode *inode, struct file *file)
{
int i = 0, rc = 0;
file_private_info_t *p_info;
debug_info_t *debug_info, *debug_info_snapshot;
-#ifdef DEBUG
- printk("debug_open\n");
-#endif
down(&debug_lock);
/* find debug log and view */
-
debug_info = debug_area_first;
while(debug_info != NULL){
for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
- if (debug_info->views[i] == NULL)
+ if (!debug_info->views[i])
continue;
- else if (debug_info->proc_entries[i] ==
- PDE(file->f_dentry->d_inode)) {
+ else if (debug_info->debugfs_entries[i] ==
+ file->f_dentry) {
goto found; /* found view ! */
}
}
@@ -516,41 +611,42 @@ static int debug_open(struct inode *inode, struct file *file)
rc = -EINVAL;
goto out;
- found:
+found:
- /* make snapshot of current debug areas to get it consistent */
+ /* Make snapshot of current debug areas to get it consistent. */
+ /* To copy all the areas is only needed, if we have a view which */
+ /* formats the debug areas. */
- debug_info_snapshot = debug_info_copy(debug_info);
+ if(!debug_info->views[i]->format_proc &&
+ !debug_info->views[i]->header_proc){
+ debug_info_snapshot = debug_info_copy(debug_info, NO_AREAS);
+ } else {
+ debug_info_snapshot = debug_info_copy(debug_info, ALL_AREAS);
+ }
if(!debug_info_snapshot){
-#ifdef DEBUG
- printk(KERN_ERR "debug_open: debug_info_copy failed (out of mem)\n");
-#endif
rc = -ENOMEM;
goto out;
}
-
- if ((file->private_data =
- kmalloc(sizeof(file_private_info_t), GFP_ATOMIC)) == 0) {
-#ifdef DEBUG
- printk(KERN_ERR "debug_open: kmalloc failed\n");
-#endif
- debug_info_free(debug_info_snapshot);
+ p_info = (file_private_info_t *) kmalloc(sizeof(file_private_info_t),
+ GFP_KERNEL);
+ if(!p_info){
+ if(debug_info_snapshot)
+ debug_info_free(debug_info_snapshot);
rc = -ENOMEM;
goto out;
}
- p_info = (file_private_info_t *) file->private_data;
p_info->offset = 0;
p_info->debug_info_snap = debug_info_snapshot;
p_info->debug_info_org = debug_info;
p_info->view = debug_info->views[i];
p_info->act_area = 0;
+ p_info->act_page = 0;
p_info->act_entry = DEBUG_PROLOG_ENTRY;
p_info->act_entry_offset = 0;
-
+ file->private_data = p_info;
debug_info_get(debug_info);
-
- out:
+out:
up(&debug_lock);
return rc;
}
@@ -561,14 +657,13 @@ static int debug_open(struct inode *inode, struct file *file)
* - deletes private_data area of the file handle
*/
-static int debug_close(struct inode *inode, struct file *file)
+static int
+debug_close(struct inode *inode, struct file *file)
{
file_private_info_t *p_info;
-#ifdef DEBUG
- printk("debug_close\n");
-#endif
p_info = (file_private_info_t *) file->private_data;
- debug_info_free(p_info->debug_info_snap);
+ if(p_info->debug_info_snap)
+ debug_info_free(p_info->debug_info_snap);
debug_info_put(p_info->debug_info_org);
kfree(file->private_data);
return 0; /* success */
@@ -580,8 +675,8 @@ static int debug_close(struct inode *inode, struct file *file)
* - returns handle for debug area
*/
-debug_info_t *debug_register
- (char *name, int page_order, int nr_areas, int buf_size)
+debug_info_t*
+debug_register (char *name, int pages_per_area, int nr_areas, int buf_size)
{
debug_info_t *rc = NULL;
@@ -591,18 +686,14 @@ debug_info_t *debug_register
/* create new debug_info */
- rc = debug_info_create(name, page_order, nr_areas, buf_size);
+ rc = debug_info_create(name, pages_per_area, nr_areas, buf_size);
if(!rc)
goto out;
debug_register_view(rc, &debug_level_view);
debug_register_view(rc, &debug_flush_view);
-#ifdef DEBUG
- printk(KERN_INFO
- "debug: reserved %d areas of %d pages for debugging %s\n",
- nr_areas, 1 << page_order, rc->name);
-#endif
- out:
- if (rc == NULL){
+ debug_register_view(rc, &debug_pages_view);
+out:
+ if (!rc){
printk(KERN_ERR "debug: debug_register failed for %s\n",name);
}
up(&debug_lock);
@@ -614,27 +705,65 @@ debug_info_t *debug_register
* - give back debug area
*/
-void debug_unregister(debug_info_t * id)
+void
+debug_unregister(debug_info_t * id)
{
if (!id)
goto out;
down(&debug_lock);
-#ifdef DEBUG
- printk(KERN_INFO "debug: unregistering %s\n", id->name);
-#endif
debug_info_put(id);
up(&debug_lock);
- out:
+out:
return;
}
/*
+ * debug_set_size:
+ * - set area size (number of pages) and number of areas
+ */
+static int
+debug_set_size(debug_info_t* id, int nr_areas, int pages_per_area)
+{
+ unsigned long flags;
+ debug_entry_t *** new_areas;
+ int rc=0;
+
+ if(!id || (nr_areas <= 0) || (pages_per_area < 0))
+ return -EINVAL;
+ if(pages_per_area > 0){
+ new_areas = debug_areas_alloc(pages_per_area, nr_areas);
+ if(!new_areas) {
+ printk(KERN_WARNING "debug: could not allocate memory "\
+ "for pagenumber: %i\n",pages_per_area);
+ rc = -ENOMEM;
+ goto out;
+ }
+ } else {
+ new_areas = NULL;
+ }
+ spin_lock_irqsave(&id->lock,flags);
+ debug_areas_free(id);
+ id->areas = new_areas;
+ id->nr_areas = nr_areas;
+ id->pages_per_area = pages_per_area;
+ id->active_area = 0;
+ memset(id->active_entries,0,sizeof(int)*id->nr_areas);
+ memset(id->active_pages, 0, sizeof(int)*id->nr_areas);
+ spin_unlock_irqrestore(&id->lock,flags);
+ printk(KERN_INFO "debug: %s: set new size (%i pages)\n"\
+ ,id->name, pages_per_area);
+out:
+ return rc;
+}
+
+/*
* debug_set_level:
* - set actual debug level
*/
-void debug_set_level(debug_info_t* id, int new_level)
+void
+debug_set_level(debug_info_t* id, int new_level)
{
unsigned long flags;
if(!id)
@@ -649,10 +778,6 @@ void debug_set_level(debug_info_t* id, int new_level)
id->name, new_level, 0, DEBUG_MAX_LEVEL);
} else {
id->level = new_level;
-#ifdef DEBUG
- printk(KERN_INFO
- "debug: %s: new level %i\n",id->name,id->level);
-#endif
}
spin_unlock_irqrestore(&id->lock,flags);
}
@@ -663,11 +788,16 @@ void debug_set_level(debug_info_t* id, int new_level)
* - set active entry to next in the ring buffer
*/
-extern inline void proceed_active_entry(debug_info_t * id)
+extern inline void
+proceed_active_entry(debug_info_t * id)
{
- if ((id->active_entry[id->active_area] += id->entry_size)
- > ((PAGE_SIZE << (id->page_order)) - id->entry_size))
- id->active_entry[id->active_area] = 0;
+ if ((id->active_entries[id->active_area] += id->entry_size)
+ > (PAGE_SIZE - id->entry_size)){
+ id->active_entries[id->active_area] = 0;
+ id->active_pages[id->active_area] =
+ (id->active_pages[id->active_area] + 1) %
+ id->pages_per_area;
+ }
}
/*
@@ -675,7 +805,8 @@ extern inline void proceed_active_entry(debug_info_t * id)
* - set active area to next in the ring buffer
*/
-extern inline void proceed_active_area(debug_info_t * id)
+extern inline void
+proceed_active_area(debug_info_t * id)
{
id->active_area++;
id->active_area = id->active_area % id->nr_areas;
@@ -685,10 +816,12 @@ extern inline void proceed_active_area(debug_info_t * id)
* get_active_entry:
*/
-extern inline debug_entry_t *get_active_entry(debug_info_t * id)
+extern inline debug_entry_t*
+get_active_entry(debug_info_t * id)
{
- return (debug_entry_t *) ((char *) id->areas[id->active_area] +
- id->active_entry[id->active_area]);
+ return (debug_entry_t *) (((char *) id->areas[id->active_area]
+ [id->active_pages[id->active_area]]) +
+ id->active_entries[id->active_area]);
}
/*
@@ -696,8 +829,9 @@ extern inline debug_entry_t *get_active_entry(debug_info_t * id)
* - set timestamp, caller address, cpu number etc.
*/
-extern inline void debug_finish_entry(debug_info_t * id, debug_entry_t* active,
- int level, int exception)
+extern inline void
+debug_finish_entry(debug_info_t * id, debug_entry_t* active, int level,
+ int exception)
{
STCK(active->id.stck);
active->id.fields.cpuid = smp_processor_id();
@@ -721,7 +855,8 @@ static int debug_active=1;
* always allow read, allow write only if debug_stoppable is set or
* if debug_active is already off
*/
-static int s390dbf_procactive(ctl_table *table, int write, struct file *filp,
+static int
+s390dbf_procactive(ctl_table *table, int write, struct file *filp,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
if (!write || debug_stoppable || !debug_active)
@@ -766,7 +901,8 @@ static struct ctl_table s390dbf_dir_table[] = {
struct ctl_table_header *s390dbf_sysctl_header;
-void debug_stop_all(void)
+void
+debug_stop_all(void)
{
if (debug_stoppable)
debug_active = 0;
@@ -778,13 +914,13 @@ void debug_stop_all(void)
* - write debug entry with given size
*/
-debug_entry_t *debug_event_common(debug_info_t * id, int level, const void *buf,
- int len)
+debug_entry_t*
+debug_event_common(debug_info_t * id, int level, const void *buf, int len)
{
unsigned long flags;
debug_entry_t *active;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
spin_lock_irqsave(&id->lock, flags);
active = get_active_entry(id);
@@ -801,13 +937,13 @@ debug_entry_t *debug_event_common(debug_info_t * id, int level, const void *buf,
* - write debug entry with given size and switch to next debug area
*/
-debug_entry_t *debug_exception_common(debug_info_t * id, int level,
- const void *buf, int len)
+debug_entry_t
+*debug_exception_common(debug_info_t * id, int level, const void *buf, int len)
{
unsigned long flags;
debug_entry_t *active;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
spin_lock_irqsave(&id->lock, flags);
active = get_active_entry(id);
@@ -823,7 +959,8 @@ debug_entry_t *debug_exception_common(debug_info_t * id, int level,
* counts arguments in format string for sprintf view
*/
-extern inline int debug_count_numargs(char *string)
+extern inline int
+debug_count_numargs(char *string)
{
int numargs=0;
@@ -838,8 +975,8 @@ extern inline int debug_count_numargs(char *string)
* debug_sprintf_event:
*/
-debug_entry_t *debug_sprintf_event(debug_info_t* id,
- int level,char *string,...)
+debug_entry_t*
+debug_sprintf_event(debug_info_t* id, int level,char *string,...)
{
va_list ap;
int numargs,idx;
@@ -849,7 +986,7 @@ debug_entry_t *debug_sprintf_event(debug_info_t* id,
if((!id) || (level > id->level))
return NULL;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
numargs=debug_count_numargs(string);
@@ -871,8 +1008,8 @@ debug_entry_t *debug_sprintf_event(debug_info_t* id,
* debug_sprintf_exception:
*/
-debug_entry_t *debug_sprintf_exception(debug_info_t* id,
- int level,char *string,...)
+debug_entry_t*
+debug_sprintf_exception(debug_info_t* id, int level,char *string,...)
{
va_list ap;
int numargs,idx;
@@ -882,7 +1019,7 @@ debug_entry_t *debug_sprintf_exception(debug_info_t* id,
if((!id) || (level > id->level))
return NULL;
- if (!debug_active)
+ if (!debug_active || !id->areas)
return NULL;
numargs=debug_count_numargs(string);
@@ -906,15 +1043,14 @@ debug_entry_t *debug_sprintf_exception(debug_info_t* id,
* - is called exactly once to initialize the debug feature
*/
-static int __init debug_init(void)
+static int
+__init debug_init(void)
{
int rc = 0;
s390dbf_sysctl_header = register_sysctl_table(s390dbf_dir_table, 1);
down(&debug_lock);
-#ifdef CONFIG_PROC_FS
- debug_proc_root_entry = proc_mkdir(DEBUG_DIR_ROOT, NULL);
-#endif /* CONFIG_PROC_FS */
+ debug_debugfs_root_entry = debugfs_create_dir(DEBUG_DIR_ROOT,NULL);
printk(KERN_INFO "debug: Initialization complete\n");
initialized = 1;
up(&debug_lock);
@@ -926,13 +1062,14 @@ static int __init debug_init(void)
* debug_register_view:
*/
-int debug_register_view(debug_info_t * id, struct debug_view *view)
+int
+debug_register_view(debug_info_t * id, struct debug_view *view)
{
int rc = 0;
int i;
unsigned long flags;
mode_t mode = S_IFREG;
- struct proc_dir_entry *pde;
+ struct dentry *pde;
if (!id)
goto out;
@@ -940,16 +1077,17 @@ int debug_register_view(debug_info_t * id, struct debug_view *view)
mode |= S_IRUSR;
if (view->input_proc)
mode |= S_IWUSR;
- pde = create_proc_entry(view->name, mode, id->proc_root_entry);
+ pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,
+ NULL, &debug_file_ops);
if (!pde){
- printk(KERN_WARNING "debug: create_proc_entry() failed! Cannot register view %s/%s\n", id->name,view->name);
+ printk(KERN_WARNING "debug: debugfs_create_file() failed!"\
+ " Cannot register view %s/%s\n", id->name,view->name);
rc = -1;
goto out;
}
-
spin_lock_irqsave(&id->lock, flags);
for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
- if (id->views[i] == NULL)
+ if (!id->views[i])
break;
}
if (i == DEBUG_MAX_VIEWS) {
@@ -957,16 +1095,14 @@ int debug_register_view(debug_info_t * id, struct debug_view *view)
id->name,view->name);
printk(KERN_WARNING
"debug: maximum number of views reached (%i)!\n", i);
- remove_proc_entry(pde->name, id->proc_root_entry);
+ debugfs_remove(pde);
rc = -1;
- }
- else {
+ } else {
id->views[i] = view;
- pde->proc_fops = &debug_file_ops;
- id->proc_entries[i] = pde;
+ id->debugfs_entries[i] = pde;
}
spin_unlock_irqrestore(&id->lock, flags);
- out:
+out:
return rc;
}
@@ -974,7 +1110,8 @@ int debug_register_view(debug_info_t * id, struct debug_view *view)
* debug_unregister_view:
*/
-int debug_unregister_view(debug_info_t * id, struct debug_view *view)
+int
+debug_unregister_view(debug_info_t * id, struct debug_view *view)
{
int rc = 0;
int i;
@@ -990,15 +1127,46 @@ int debug_unregister_view(debug_info_t * id, struct debug_view *view)
if (i == DEBUG_MAX_VIEWS)
rc = -1;
else {
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(id->proc_entries[i]->name,
- id->proc_root_entry);
-#endif
+ debugfs_remove(id->debugfs_entries[i]);
id->views[i] = NULL;
rc = 0;
}
spin_unlock_irqrestore(&id->lock, flags);
- out:
+out:
+ return rc;
+}
+
+static inline char *
+debug_get_user_string(const char __user *user_buf, size_t user_len)
+{
+ char* buffer;
+
+ buffer = kmalloc(user_len + 1, GFP_KERNEL);
+ if (!buffer)
+ return ERR_PTR(-ENOMEM);
+ if (copy_from_user(buffer, user_buf, user_len) != 0) {
+ kfree(buffer);
+ return ERR_PTR(-EFAULT);
+ }
+ /* got the string, now strip linefeed. */
+ if (buffer[user_len - 1] == '\n')
+ buffer[user_len - 1] = 0;
+ else
+ buffer[user_len] = 0;
+ return buffer;
+}
+
+static inline int
+debug_get_uint(char *buf)
+{
+ int rc;
+
+ for(; isspace(*buf); buf++);
+ rc = simple_strtoul(buf, &buf, 10);
+ if(*buf){
+ printk("debug: no integer specified!\n");
+ rc = -EINVAL;
+ }
return rc;
}
@@ -1011,13 +1179,69 @@ int debug_unregister_view(debug_info_t * id, struct debug_view *view)
* prints out actual debug level
*/
-static int debug_prolog_level_fn(debug_info_t * id,
+static int
+debug_prolog_pages_fn(debug_info_t * id,
struct debug_view *view, char *out_buf)
{
+ return sprintf(out_buf, "%i\n", id->pages_per_area);
+}
+
+/*
+ * reads new size (number of pages per debug area)
+ */
+
+static int
+debug_input_pages_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_len, loff_t * offset)
+{
+ char *str;
+ int rc,new_pages;
+
+ if (user_len > 0x10000)
+ user_len = 0x10000;
+ if (*offset != 0){
+ rc = -EPIPE;
+ goto out;
+ }
+ str = debug_get_user_string(user_buf,user_len);
+ if(IS_ERR(str)){
+ rc = PTR_ERR(str);
+ goto out;
+ }
+ new_pages = debug_get_uint(str);
+ if(new_pages < 0){
+ rc = -EINVAL;
+ goto free_str;
+ }
+ rc = debug_set_size(id,id->nr_areas, new_pages);
+ if(rc != 0){
+ rc = -EINVAL;
+ goto free_str;
+ }
+ rc = user_len;
+free_str:
+ kfree(str);
+out:
+ *offset += user_len;
+ return rc; /* number of input characters */
+}
+
+/*
+ * prints out actual debug level
+ */
+
+static int
+debug_prolog_level_fn(debug_info_t * id, struct debug_view *view, char *out_buf)
+{
int rc = 0;
- if(id->level == -1) rc = sprintf(out_buf,"-\n");
- else rc = sprintf(out_buf, "%i\n", id->level);
+ if(id->level == DEBUG_OFF_LEVEL) {
+ rc = sprintf(out_buf,"-\n");
+ }
+ else {
+ rc = sprintf(out_buf, "%i\n", id->level);
+ }
return rc;
}
@@ -1025,30 +1249,43 @@ static int debug_prolog_level_fn(debug_info_t * id,
* reads new debug level
*/
-static int debug_input_level_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t in_buf_size, loff_t * offset)
+static int
+debug_input_level_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_len, loff_t * offset)
{
- char input_buf[1];
- int rc = in_buf_size;
+ char *str;
+ int rc,new_level;
- if (*offset != 0)
+ if (user_len > 0x10000)
+ user_len = 0x10000;
+ if (*offset != 0){
+ rc = -EPIPE;
goto out;
- if (copy_from_user(input_buf, user_buf, 1)){
- rc = -EFAULT;
+ }
+ str = debug_get_user_string(user_buf,user_len);
+ if(IS_ERR(str)){
+ rc = PTR_ERR(str);
goto out;
}
- if (isdigit(input_buf[0])) {
- int new_level = ((int) input_buf[0] - (int) '0');
- debug_set_level(id, new_level);
- } else if(input_buf[0] == '-') {
+ if(str[0] == '-'){
debug_set_level(id, DEBUG_OFF_LEVEL);
+ rc = user_len;
+ goto free_str;
} else {
- printk(KERN_INFO "debug: level `%c` is not valid\n",
- input_buf[0]);
+ new_level = debug_get_uint(str);
}
- out:
- *offset += in_buf_size;
+ if(new_level < 0) {
+ printk(KERN_INFO "debug: level `%s` is not valid\n", str);
+ rc = -EINVAL;
+ } else {
+ debug_set_level(id, new_level);
+ rc = user_len;
+ }
+free_str:
+ kfree(str);
+out:
+ *offset += user_len;
return rc; /* number of input characters */
}
@@ -1057,29 +1294,36 @@ static int debug_input_level_fn(debug_info_t * id, struct debug_view *view,
* flushes debug areas
*/
-void debug_flush(debug_info_t* id, int area)
+void
+debug_flush(debug_info_t* id, int area)
{
unsigned long flags;
- int i;
+ int i,j;
- if(!id)
+ if(!id || !id->areas)
return;
spin_lock_irqsave(&id->lock,flags);
if(area == DEBUG_FLUSH_ALL){
id->active_area = 0;
- memset(id->active_entry, 0, id->nr_areas * sizeof(int));
- for (i = 0; i < id->nr_areas; i++)
- memset(id->areas[i], 0, PAGE_SIZE << id->page_order);
+ memset(id->active_entries, 0, id->nr_areas * sizeof(int));
+ for (i = 0; i < id->nr_areas; i++) {
+ id->active_pages[i] = 0;
+ for(j = 0; j < id->pages_per_area; j++) {
+ memset(id->areas[i][j], 0, PAGE_SIZE);
+ }
+ }
printk(KERN_INFO "debug: %s: all areas flushed\n",id->name);
} else if(area >= 0 && area < id->nr_areas) {
- id->active_entry[area] = 0;
- memset(id->areas[area], 0, PAGE_SIZE << id->page_order);
- printk(KERN_INFO
- "debug: %s: area %i has been flushed\n",
+ id->active_entries[area] = 0;
+ id->active_pages[area] = 0;
+ for(i = 0; i < id->pages_per_area; i++) {
+ memset(id->areas[area][i],0,PAGE_SIZE);
+ }
+ printk(KERN_INFO "debug: %s: area %i has been flushed\n",
id->name, area);
} else {
printk(KERN_INFO
- "debug: %s: area %i cannot be flushed (range: %i - %i)\n",
+ "debug: %s: area %i cannot be flushed (range: %i - %i)\n",
id->name, area, 0, id->nr_areas-1);
}
spin_unlock_irqrestore(&id->lock,flags);
@@ -1089,15 +1333,20 @@ void debug_flush(debug_info_t* id, int area)
* view function: flushes debug areas
*/
-static int debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
- struct file *file, const char __user *user_buf,
- size_t in_buf_size, loff_t * offset)
+static int
+debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
+ struct file *file, const char __user *user_buf,
+ size_t user_len, loff_t * offset)
{
char input_buf[1];
- int rc = in_buf_size;
-
- if (*offset != 0)
+ int rc = user_len;
+
+ if (user_len > 0x10000)
+ user_len = 0x10000;
+ if (*offset != 0){
+ rc = -EPIPE;
goto out;
+ }
if (copy_from_user(input_buf, user_buf, 1)){
rc = -EFAULT;
goto out;
@@ -1114,8 +1363,8 @@ static int debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
printk(KERN_INFO "debug: area `%c` is not valid\n", input_buf[0]);
- out:
- *offset += in_buf_size;
+out:
+ *offset += user_len;
return rc; /* number of input characters */
}
@@ -1123,8 +1372,9 @@ static int debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
* prints debug header in raw format
*/
-int debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
- int area, debug_entry_t * entry, char *out_buf)
+static int
+debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
+ int area, debug_entry_t * entry, char *out_buf)
{
int rc;
@@ -1137,7 +1387,8 @@ int debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
* prints debug data in raw format
*/
-static int debug_raw_format_fn(debug_info_t * id, struct debug_view *view,
+static int
+debug_raw_format_fn(debug_info_t * id, struct debug_view *view,
char *out_buf, const char *in_buf)
{
int rc;
@@ -1151,8 +1402,9 @@ static int debug_raw_format_fn(debug_info_t * id, struct debug_view *view,
* prints debug data in hex/ascii format
*/
-static int debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, const char *in_buf)
+static int
+debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
+ char *out_buf, const char *in_buf)
{
int i, rc = 0;
@@ -1176,7 +1428,8 @@ static int debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
* prints header for debug entry
*/
-int debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
+int
+debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
int area, debug_entry_t * entry, char *out_buf)
{
struct timeval time_val;
@@ -1210,8 +1463,9 @@ int debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
#define DEBUG_SPRINTF_MAX_ARGS 10
-int debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
- char *out_buf, debug_sprintf_entry_t *curr_event)
+static int
+debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
+ char *out_buf, debug_sprintf_entry_t *curr_event)
{
int num_longs, num_used_args = 0,i, rc = 0;
int index[DEBUG_SPRINTF_MAX_ARGS];
@@ -1251,14 +1505,10 @@ out:
/*
* clean up module
*/
-void __exit debug_exit(void)
+void
+__exit debug_exit(void)
{
-#ifdef DEBUG
- printk("debug_cleanup_module: \n");
-#endif
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(debug_proc_root_entry->name, NULL);
-#endif /* CONFIG_PROC_FS */
+ debugfs_remove(debug_debugfs_root_entry);
unregister_sysctl_table(s390dbf_sysctl_header);
return;
}
@@ -1266,7 +1516,7 @@ void __exit debug_exit(void)
/*
* module definitions
*/
-core_initcall(debug_init);
+postcore_initcall(debug_init);
module_exit(debug_exit);
MODULE_LICENSE("GPL");
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index c0e09b33febe..5b262b5d869f 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -7,6 +7,7 @@
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Hartmut Penner (hp@de.ibm.com),
* Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/sys.h>
@@ -49,9 +50,9 @@ SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC
SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP
SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
-_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
+_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING | \
_TIF_RESTART_SVC | _TIF_SINGLE_STEP )
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
+_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
@@ -121,7 +122,11 @@ STACK_SIZE = 1 << STACK_SHIFT
bz BASED(stack_overflow)
3:
#endif
-2: s %r15,BASED(.Lc_spsize) # make room for registers & psw
+2:
+ .endm
+
+ .macro CREATE_STACK_FRAME psworg,savearea
+ s %r15,BASED(.Lc_spsize) # make room for registers & psw
mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
la %r12,\psworg
st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
@@ -161,6 +166,13 @@ __switch_to_base:
be __switch_to_noper-__switch_to_base(%r1) # we got away w/o bashing TLB's
lctl %c9,%c11,__THREAD_per(%r3) # Nope we didn't
__switch_to_noper:
+ l %r4,__THREAD_info(%r2) # get thread_info of prev
+ tm __TI_flags+3(%r4),_TIF_MCCK_PENDING # machine check pending?
+ bz __switch_to_no_mcck-__switch_to_base(%r1)
+ ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
+ l %r4,__THREAD_info(%r3) # get thread_info of next
+ oi __TI_flags+3(%r4),_TIF_MCCK_PENDING # set it in next
+__switch_to_no_mcck:
stm %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
st %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
l %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
@@ -185,6 +197,7 @@ system_call:
sysc_saveall:
SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
lh %r7,0x8a # get svc number from lowcore
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
sysc_vtime:
@@ -234,6 +247,8 @@ sysc_work_loop:
# One of the work bits is on. Find out which one.
#
sysc_work:
+ tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
+ bo BASED(sysc_mcck_pending)
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
bo BASED(sysc_reschedule)
tm __TI_flags+3(%r9),_TIF_SIGPENDING
@@ -253,6 +268,14 @@ sysc_reschedule:
br %r1 # call scheduler
#
+# _TIF_MCCK_PENDING is set, call handler
+#
+sysc_mcck_pending:
+ l %r1,BASED(.Ls390_handle_mcck)
+ la %r14,BASED(sysc_work_loop)
+ br %r1 # TIF bit will be cleared by handler
+
+#
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
@@ -430,6 +453,7 @@ pgm_check_handler:
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
bnz BASED(pgm_per) # got per exception -> special case
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime)
@@ -468,6 +492,7 @@ pgm_per:
#
pgm_per_std:
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime2)
@@ -493,6 +518,7 @@ pgm_no_vtime2:
#
pgm_svcper:
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime3)
@@ -521,6 +547,7 @@ io_int_handler:
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
+ CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(io_no_vtime)
@@ -578,9 +605,11 @@ io_work:
lr %r15,%r1
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING and _TIF_NEED_RESCHED
+# Checked are: _TIF_SIGPENDING, _TIF_NEED_RESCHED and _TIF_MCCK_PENDING
#
io_work_loop:
+ tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
+ bo BASED(io_mcck_pending)
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
bo BASED(io_reschedule)
tm __TI_flags+3(%r9),_TIF_SIGPENDING
@@ -588,6 +617,14 @@ io_work_loop:
b BASED(io_leave)
#
+# _TIF_MCCK_PENDING is set, call handler
+#
+io_mcck_pending:
+ l %r1,BASED(.Ls390_handle_mcck)
+ l %r14,BASED(io_work_loop)
+ br %r1 # TIF bit will be cleared by handler
+
+#
# _TIF_NEED_RESCHED is set, call schedule
#
io_reschedule:
@@ -621,6 +658,7 @@ ext_int_handler:
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
+ CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(ext_no_vtime)
@@ -642,19 +680,62 @@ ext_no_vtime:
.globl mcck_int_handler
mcck_int_handler:
- STORE_TIMER __LC_ASYNC_ENTER_TIMER
+ spt __LC_CPU_TIMER_SAVE_AREA # revalidate cpu timer
+ lm %r0,%r15,__LC_GPREGS_SAVE_AREA # revalidate gprs
SAVE_ALL_BASE __LC_SAVE_AREA+32
- SAVE_ALL __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32,0
+ la %r12,__LC_MCK_OLD_PSW
+ tm __LC_MCCK_CODE,0x80 # system damage?
+ bo BASED(mcck_int_main) # yes -> rest of mcck code invalid
+ tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
+ bo BASED(0f)
+ spt __LC_LAST_UPDATE_TIMER # revalidate cpu timer
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- tm SP_PSW+1(%r15),0x01 # interrupting from user ?
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_EXIT_TIMER
+0: tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
+ bno BASED(mcck_no_vtime) # no -> skip cleanup critical
+ tm __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
bz BASED(mcck_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
mcck_no_vtime:
#endif
+0:
+ tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
+ bno BASED(mcck_int_main) # no -> skip cleanup critical
+ tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
+ bnz BASED(mcck_int_main) # from user -> load async stack
+ clc __LC_MCK_OLD_PSW+4(4),BASED(.Lcritical_end)
+ bhe BASED(mcck_int_main)
+ clc __LC_MCK_OLD_PSW+4(4),BASED(.Lcritical_start)
+ bl BASED(mcck_int_main)
+ l %r14,BASED(.Lcleanup_critical)
+ basr %r14,%r14
+mcck_int_main:
+ l %r14,__LC_PANIC_STACK # are we already on the panic stack?
+ slr %r14,%r15
+ sra %r14,PAGE_SHIFT
+ be BASED(0f)
+ l %r15,__LC_PANIC_STACK # load panic stack
+0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ls390_mcck)
- basr %r14,%r1 # call machine check handler
+ basr %r14,%r1 # call machine check handler
+ tm SP_PSW+1(%r15),0x01 # returning to user ?
+ bno BASED(mcck_return)
+ l %r1,__LC_KERNEL_STACK # switch to kernel stack
+ s %r1,BASED(.Lc_spsize)
+ mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
+ xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
+ lr %r15,%r1
+ stosm __SF_EMPTY(%r15),0x04 # turn dat on
+ tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
+ bno BASED(mcck_return)
+ l %r1,BASED(.Ls390_handle_mcck)
+ basr %r14,%r1 # call machine check handler
mcck_return:
RESTORE_ALL 0
@@ -742,7 +823,7 @@ cleanup_critical:
clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop)
bl BASED(0f)
clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
- bl BASED(cleanup_sysc_leave)
+ bl BASED(cleanup_sysc_return)
0:
br %r14
@@ -760,6 +841,7 @@ cleanup_system_call:
mvc __LC_SAVE_AREA(16),__LC_SAVE_AREA+16
0: st %r13,__LC_SAVE_AREA+20
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
st %r15,__LC_SAVE_AREA+28
lh %r7,0x8a
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
@@ -834,6 +916,8 @@ cleanup_sysc_leave_insn:
* Symbol constants
*/
.Ls390_mcck: .long s390_do_machine_check
+.Ls390_handle_mcck:
+ .long s390_handle_mcck
.Ldo_IRQ: .long do_IRQ
.Ldo_extint: .long do_extint
.Ldo_signal: .long do_signal
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 51527ab8c8f9..57ca75d0ad7f 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -7,6 +7,7 @@
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Hartmut Penner (hp@de.ibm.com),
* Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/sys.h>
@@ -52,9 +53,9 @@ SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
-_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
+_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING | \
_TIF_RESTART_SVC | _TIF_SINGLE_STEP )
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
+_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
#define BASED(name) name-system_call(%r13)
@@ -114,7 +115,11 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
jz stack_overflow
3:
#endif
-2: aghi %r15,-SP_SIZE # make room for registers & psw
+2:
+ .endm
+
+ .macro CREATE_STACK_FRAME psworg,savearea
+ aghi %r15,-SP_SIZE # make room for registers & psw
mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
la %r12,\psworg
stg %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
@@ -152,6 +157,13 @@ __switch_to:
je __switch_to_noper # we got away without bashing TLB's
lctlg %c9,%c11,__THREAD_per(%r3) # Nope we didn't
__switch_to_noper:
+ lg %r4,__THREAD_info(%r2) # get thread_info of prev
+ tm __TI_flags+7(%r4),_TIF_MCCK_PENDING # machine check pending?
+ jz __switch_to_no_mcck
+ ni __TI_flags+7(%r4),255-_TIF_MCCK_PENDING # clear flag in prev
+ lg %r4,__THREAD_info(%r3) # get thread_info of next
+ oi __TI_flags+7(%r4),_TIF_MCCK_PENDING # set it in next
+__switch_to_no_mcck:
stmg %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
stg %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
lg %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
@@ -176,6 +188,7 @@ system_call:
sysc_saveall:
SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
sysc_vtime:
@@ -232,6 +245,8 @@ sysc_work_loop:
# One of the work bits is on. Find out which one.
#
sysc_work:
+ tm __TI_flags+7(%r9),_TIF_MCCK_PENDING
+ jo sysc_mcck_pending
tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
jo sysc_reschedule
tm __TI_flags+7(%r9),_TIF_SIGPENDING
@@ -250,6 +265,13 @@ sysc_reschedule:
jg schedule # return point is sysc_return
#
+# _TIF_MCCK_PENDING is set, call handler
+#
+sysc_mcck_pending:
+ larl %r14,sysc_work_loop
+ jg s390_handle_mcck # TIF bit will be cleared by handler
+
+#
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
@@ -474,6 +496,7 @@ pgm_check_handler:
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
jnz pgm_per # got per exception -> special case
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime
@@ -512,6 +535,7 @@ pgm_per:
#
pgm_per_std:
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime2
@@ -537,6 +561,7 @@ pgm_no_vtime2:
#
pgm_svcper:
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime3
@@ -564,6 +589,7 @@ io_int_handler:
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+32
SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+32,0
+ CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+32
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz io_no_vtime
@@ -621,9 +647,11 @@ io_work:
lgr %r15,%r1
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING and _TIF_NEED_RESCHED
+# Checked are: _TIF_SIGPENDING, _TIF_NEED_RESCHED and _TIF_MCCK_PENDING
#
io_work_loop:
+ tm __TI_flags+7(%r9),_TIF_MCCK_PENDING
+ jo io_mcck_pending
tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
jo io_reschedule
tm __TI_flags+7(%r9),_TIF_SIGPENDING
@@ -631,6 +659,13 @@ io_work_loop:
j io_leave
#
+# _TIF_MCCK_PENDING is set, call handler
+#
+io_mcck_pending:
+ larl %r14,io_work_loop
+ jg s390_handle_mcck # TIF bit will be cleared by handler
+
+#
# _TIF_NEED_RESCHED is set, call schedule
#
io_reschedule:
@@ -661,6 +696,7 @@ ext_int_handler:
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+32
SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32,0
+ CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz ext_no_vtime
@@ -680,18 +716,60 @@ ext_no_vtime:
*/
.globl mcck_int_handler
mcck_int_handler:
- STORE_TIMER __LC_ASYNC_ENTER_TIMER
+ la %r1,4095 # revalidate r1
+ spt __LC_CPU_TIMER_SAVE_AREA-4095(%r1) # revalidate cpu timer
+ lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# revalidate gprs
SAVE_ALL_BASE __LC_SAVE_AREA+64
- SAVE_ALL __LC_MCK_OLD_PSW,__LC_SAVE_AREA+64,0
+ la %r12,__LC_MCK_OLD_PSW
+ tm __LC_MCCK_CODE,0x80 # system damage?
+ jo mcck_int_main # yes -> rest of mcck code invalid
+ tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
+ jo 0f
+ spt __LC_LAST_UPDATE_TIMER
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- tm SP_PSW+1(%r15),0x01 # interrupting from user ?
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_EXIT_TIMER
+0: tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
+ jno mcck_no_vtime # no -> no timer update
+ tm __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
jz mcck_no_vtime
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
mcck_no_vtime:
#endif
- brasl %r14,s390_do_machine_check
+0:
+ tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
+ jno mcck_int_main # no -> skip cleanup critical
+ tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
+ jnz mcck_int_main # from user -> load kernel stack
+ clc __LC_MCK_OLD_PSW+8(8),BASED(.Lcritical_end)
+ jhe mcck_int_main
+ clc __LC_MCK_OLD_PSW+8(8),BASED(.Lcritical_start)
+ jl mcck_int_main
+ brasl %r14,cleanup_critical
+mcck_int_main:
+ lg %r14,__LC_PANIC_STACK # are we already on the panic stack?
+ slgr %r14,%r15
+ srag %r14,%r14,PAGE_SHIFT
+ jz 0f
+ lg %r15,__LC_PANIC_STACK # load panic stack
+0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+64
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ la %r2,SP_PTREGS(%r15) # load pt_regs
+ brasl %r14,s390_do_machine_check
+ tm SP_PSW+1(%r15),0x01 # returning to user ?
+ jno mcck_return
+ lg %r1,__LC_KERNEL_STACK # switch to kernel stack
+ aghi %r1,-SP_SIZE
+ mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
+ xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) # clear back chain
+ lgr %r15,%r1
+ stosm __SF_EMPTY(%r15),0x04 # turn dat on
+ tm __TI_flags+7(%r9),_TIF_MCCK_PENDING
+ jno mcck_return
+ brasl %r14,s390_handle_mcck
mcck_return:
RESTORE_ALL 0
@@ -775,7 +853,7 @@ cleanup_critical:
clc 8(8,%r12),BASED(cleanup_table_sysc_work_loop)
jl 0f
clc 8(8,%r12),BASED(cleanup_table_sysc_work_loop+8)
- jl cleanup_sysc_leave
+ jl cleanup_sysc_return
0:
br %r14
@@ -793,6 +871,7 @@ cleanup_system_call:
mvc __LC_SAVE_AREA(32),__LC_SAVE_AREA+32
0: stg %r13,__LC_SAVE_AREA+40
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
stg %r15,__LC_SAVE_AREA+56
llgh %r7,__LC_SVC_INT_CODE
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index b804c55bd919..fc8bf5e285f6 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -345,10 +345,25 @@ iplstart:
bno .Lnoreset
la %r2,.Lreset
lhi %r3,26
- .long 0x83230008
+ diag %r2,%r3,8
+ mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
+.Lwaitrdrirq:
+ lpsw .Lrdrwaitpsw
+.Lrdrint:
+ c %r1,0xb8 # compare subchannel number
+ bne .Lwaitrdrirq
+ la %r5,.Lirb
+ tsch 0(%r5)
.Lnoreset:
+ b .Lnoload
+
+ .align 8
+.Lrdrnewpsw:
+ .long 0x00080000,0x80000000+.Lrdrint
+.Lrdrwaitpsw:
+ .long 0x020a0000,0x80000000+.Lrdrint
#endif
-
+
#
# everything loaded, go for it
#
@@ -517,10 +532,10 @@ startup:basr %r13,0 # get base
l %r2, .Lrcp2-.LPG1(%r13) # try with Read SCP
b .Lservicecall-.LPG1(%r13)
.Lprocsccb:
- lh %r1,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
- chi %r1,0x00
- jne .Lscnd
- l %r1,.Lscpincr2-PARMAREA(%r4) # otherwise use this one
+ lhi %r1,0
+ icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
+ jnz .Lscnd
+ l %r1,.Lscpincr2-PARMAREA+4(%r4) # otherwise use this one
.Lscnd:
xr %r3,%r3 # same logic
ic %r3,.Lscpa1-PARMAREA(%r4)
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 8366793bc371..f525c0c21250 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -344,10 +344,25 @@ iplstart:
bno .Lnoreset
la %r2,.Lreset
lhi %r3,26
- .long 0x83230008
+ diag %r2,%r3,8
+ mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
+.Lwaitrdrirq:
+ lpsw .Lrdrwaitpsw
+.Lrdrint:
+ c %r1,0xb8 # compare subchannel number
+ bne .Lwaitrdrirq
+ la %r5,.Lirb
+ tsch 0(%r5)
.Lnoreset:
+ b .Lnoload
+
+ .align 8
+.Lrdrnewpsw:
+ .long 0x00080000,0x80000000+.Lrdrint
+.Lrdrwaitpsw:
+ .long 0x020a0000,0x80000000+.Lrdrint
#endif
-
+
#
# everything loaded, go for it
#
@@ -518,9 +533,9 @@ startup:basr %r13,0 # get base
l %r2,.Lrcp2-.LPG1(%r13) # try with Read SCP
b .Lservicecall-.LPG1(%r13)
.Lprocsccb:
- lh %r1,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
- chi %r1,0x00
- jne .Lscnd
+ lghi %r1,0
+ icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
+ jnz .Lscnd
lg %r1,.Lscpincr2-PARMAREA(%r4) # otherwise use this one
.Lscnd:
xr %r3,%r3 # same logic
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
new file mode 100644
index 000000000000..2721c3a32b84
--- /dev/null
+++ b/arch/s390/kernel/machine_kexec.c
@@ -0,0 +1,98 @@
+/*
+ * arch/s390/kernel/machine_kexec.c
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
+ *
+ */
+
+/*
+ * s390_machine_kexec.c - handle the transition of Linux booting another kernel
+ * on the S390 architecture.
+ */
+
+#include <asm/cio.h>
+#include <asm/setup.h>
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/kexec.h>
+#include <linux/delay.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/system.h>
+
+static void kexec_halt_all_cpus(void *);
+
+typedef void (*relocate_kernel_t) (kimage_entry_t *, unsigned long);
+
+const extern unsigned char relocate_kernel[];
+const extern unsigned long long relocate_kernel_len;
+
+int
+machine_kexec_prepare(struct kimage *image)
+{
+ unsigned long reboot_code_buffer;
+
+ /* We don't support anything but the default image type for now. */
+ if (image->type != KEXEC_TYPE_DEFAULT)
+ return -EINVAL;
+
+ /* Get the destination where the assembler code should be copied to.*/
+ reboot_code_buffer = page_to_pfn(image->control_code_page)<<PAGE_SHIFT;
+
+ /* Then copy it */
+ memcpy((void *) reboot_code_buffer, relocate_kernel,
+ relocate_kernel_len);
+ return 0;
+}
+
+void
+machine_kexec_cleanup(struct kimage *image)
+{
+}
+
+void
+machine_shutdown(void)
+{
+ printk(KERN_INFO "kexec: machine_shutdown called\n");
+}
+
+NORET_TYPE void
+machine_kexec(struct kimage *image)
+{
+ clear_all_subchannels();
+
+ /* Disable lowcore protection */
+ ctl_clear_bit(0,28);
+
+ on_each_cpu(kexec_halt_all_cpus, image, 0, 0);
+ for (;;);
+}
+
+static void
+kexec_halt_all_cpus(void *kernel_image)
+{
+ static atomic_t cpuid = ATOMIC_INIT(-1);
+ int cpu;
+ struct kimage *image;
+ relocate_kernel_t data_mover;
+
+ if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid))
+ signal_processor(smp_processor_id(), sigp_stop);
+
+ /* Wait for all other cpus to enter stopped state */
+ for_each_online_cpu(cpu) {
+ if (cpu == smp_processor_id())
+ continue;
+ while (!smp_cpu_not_running(cpu))
+ cpu_relax();
+ }
+
+ image = (struct kimage *) kernel_image;
+ data_mover = (relocate_kernel_t)
+ (page_to_pfn(image->control_code_page) << PAGE_SHIFT);
+
+ /* Call the moving routine */
+ (*data_mover) (&image->head, image->start);
+}
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 7aea25d6e300..9f3dff6c0b72 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -91,13 +91,12 @@ void do_monitor_call(struct pt_regs *regs, long interruption_code)
(void *)(long) smp_processor_id());
}
+extern void s390_handle_mcck(void);
/*
* The idle loop on a S390...
*/
void default_idle(void)
{
- psw_t wait_psw;
- unsigned long reg;
int cpu, rc;
local_irq_disable();
@@ -125,38 +124,17 @@ void default_idle(void)
cpu_die();
#endif
- /*
- * Wait for external, I/O or machine check interrupt and
- * switch off machine check bit after the wait has ended.
- */
- wait_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK | PSW_MASK_WAIT |
- PSW_MASK_IO | PSW_MASK_EXT;
-#ifndef CONFIG_ARCH_S390X
- asm volatile (
- " basr %0,0\n"
- "0: la %0,1f-0b(%0)\n"
- " st %0,4(%1)\n"
- " oi 4(%1),0x80\n"
- " lpsw 0(%1)\n"
- "1: la %0,2f-1b(%0)\n"
- " st %0,4(%1)\n"
- " oi 4(%1),0x80\n"
- " ni 1(%1),0xf9\n"
- " lpsw 0(%1)\n"
- "2:"
- : "=&a" (reg) : "a" (&wait_psw) : "memory", "cc" );
-#else /* CONFIG_ARCH_S390X */
- asm volatile (
- " larl %0,0f\n"
- " stg %0,8(%1)\n"
- " lpswe 0(%1)\n"
- "0: larl %0,1f\n"
- " stg %0,8(%1)\n"
- " ni 1(%1),0xf9\n"
- " lpswe 0(%1)\n"
- "1:"
- : "=&a" (reg) : "a" (&wait_psw) : "memory", "cc" );
-#endif /* CONFIG_ARCH_S390X */
+ local_mcck_disable();
+ if (test_thread_flag(TIF_MCCK_PENDING)) {
+ local_mcck_enable();
+ local_irq_enable();
+ s390_handle_mcck();
+ return;
+ }
+
+ /* Wait for external, I/O or machine check interrupt. */
+ __load_psw_mask(PSW_KERNEL_BITS | PSW_MASK_WAIT |
+ PSW_MASK_IO | PSW_MASK_EXT);
}
void cpu_idle(void)
diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S
new file mode 100644
index 000000000000..d5e4a62fbb79
--- /dev/null
+++ b/arch/s390/kernel/relocate_kernel.S
@@ -0,0 +1,81 @@
+/*
+ * arch/s390/kernel/relocate_kernel.S
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
+ *
+ */
+
+/*
+ * moves the new kernel to its destination...
+ * %r2 = pointer to first kimage_entry_t
+ * %r3 = start address - where to jump to after the job is done...
+ *
+ * %r5 will be used as temp. storage
+ * %r6 holds the destination address
+ * %r7 = PAGE_SIZE
+ * %r8 holds the source address
+ * %r9 = PAGE_SIZE
+ * %r10 is a page mask
+ */
+
+ .text
+ .globl relocate_kernel
+ relocate_kernel:
+ basr %r13,0 #base address
+ .base:
+ spx zero64-.base(%r13) #absolute addressing mode
+ stnsm sys_msk-.base(%r13),0xf8 #disable DAT and IRQ (external)
+ lhi %r10,-1 #preparing the mask
+ sll %r10,12 #shift it such that it becomes 0xf000
+ .top:
+ lhi %r7,4096 #load PAGE_SIZE in r7
+ lhi %r9,4096 #load PAGE_SIZE in r9
+ l %r5,0(%r2) #read another word for indirection page
+ ahi %r2,4 #increment pointer
+ tml %r5,0x1 #is it a destination page?
+ je .indir_check #NO, goto "indir_check"
+ lr %r6,%r5 #r6 = r5
+ nr %r6,%r10 #mask it out and...
+ j .top #...next iteration
+ .indir_check:
+ tml %r5,0x2 #is it a indirection page?
+ je .done_test #NO, goto "done_test"
+ nr %r5,%r10 #YES, mask out,
+ lr %r2,%r5 #move it into the right register,
+ j .top #and read next...
+ .done_test:
+ tml %r5,0x4 #is it the done indicator?
+ je .source_test #NO! Well, then it should be the source indicator...
+ j .done #ok, lets finish it here...
+ .source_test:
+ tml %r5,0x8 #it should be a source indicator...
+ je .top #NO, ignore it...
+ lr %r8,%r5 #r8 = r5
+ nr %r8,%r10 #masking
+ 0: mvcle %r6,%r8,0x0 #copy PAGE_SIZE bytes from r8 to r6 - pad with 0
+ jo 0b
+ j .top
+ .done:
+ sr %r0,%r0 #clear register r0
+ la %r4,load_psw-.base(%r13) #load psw-address into the register
+ o %r3,4(%r4) #or load address into psw
+ st %r3,4(%r4)
+ mvc 0(8,%r0),0(%r4) #copy psw to absolute address 0
+ sr %r1,%r1 #clear %r1
+ sr %r2,%r2 #clear %r2
+ sigp %r1,%r2,0x12 #set cpuid to zero
+ lpsw 0 #hopefully start new kernel...
+
+ .align 8
+ zero64:
+ .quad 0
+ load_psw:
+ .long 0x00080000,0x80000000
+ sys_msk:
+ .quad 0
+ relocate_kernel_end:
+ .globl relocate_kernel_len
+ relocate_kernel_len:
+ .quad relocate_kernel_end - relocate_kernel
diff --git a/arch/s390/kernel/relocate_kernel64.S b/arch/s390/kernel/relocate_kernel64.S
new file mode 100644
index 000000000000..96290cc4eb3c
--- /dev/null
+++ b/arch/s390/kernel/relocate_kernel64.S
@@ -0,0 +1,82 @@
+/*
+ * arch/s390/kernel/relocate_kernel64.S
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
+ *
+ */
+
+/*
+ * moves the new kernel to its destination...
+ * %r2 = pointer to first kimage_entry_t
+ * %r3 = start address - where to jump to after the job is done...
+ *
+ * %r5 will be used as temp. storage
+ * %r6 holds the destination address
+ * %r7 = PAGE_SIZE
+ * %r8 holds the source address
+ * %r9 = PAGE_SIZE
+ *
+ * 0xf000 is a page_mask
+ */
+
+ .text
+ .globl relocate_kernel
+ relocate_kernel:
+ basr %r13,0 #base address
+ .base:
+ spx zero64-.base(%r13) #absolute addressing mode
+ stnsm sys_msk-.base(%r13),0xf8 #disable DAT and IRQ (external)
+ .top:
+ lghi %r7,4096 #load PAGE_SIZE in r7
+ lghi %r9,4096 #load PAGE_SIZE in r9
+ lg %r5,0(%r2) #read another word for indirection page
+ aghi %r2,8 #increment pointer
+ tml %r5,0x1 #is it a destination page?
+ je .indir_check #NO, goto "indir_check"
+ lgr %r6,%r5 #r6 = r5
+ nill %r6,0xf000 #mask it out and...
+ j .top #...next iteration
+ .indir_check:
+ tml %r5,0x2 #is it a indirection page?
+ je .done_test #NO, goto "done_test"
+ nill %r5,0xf000 #YES, mask out,
+ lgr %r2,%r5 #move it into the right register,
+ j .top #and read next...
+ .done_test:
+ tml %r5,0x4 #is it the done indicator?
+ je .source_test #NO! Well, then it should be the source indicator...
+ j .done #ok, lets finish it here...
+ .source_test:
+ tml %r5,0x8 #it should be a source indicator...
+ je .top #NO, ignore it...
+ lgr %r8,%r5 #r8 = r5
+ nill %r8,0xf000 #masking
+ 0: mvcle %r6,%r8,0x0 #copy PAGE_SIZE bytes from r8 to r6 - pad with 0
+ jo 0b
+ j .top
+ .done:
+ sgr %r0,%r0 #clear register r0
+ la %r4,load_psw-.base(%r13) #load psw-address into the register
+ o %r3,4(%r4) #or load address into psw
+ st %r3,4(%r4)
+ mvc 0(8,%r0),0(%r4) #copy psw to absolute address 0
+ sam31 #31 bit mode
+ sr %r1,%r1 #erase register r1
+ sr %r2,%r2 #erase register r2
+ sigp %r1,%r2,0x12 #set cpuid to zero
+ lpsw 0 #hopefully start new kernel...
+
+ .align 8
+ zero64:
+ .quad 0
+ load_psw:
+ .long 0x00080000,0x80000000
+ sys_msk:
+ .quad 0
+ relocate_kernel_end:
+ .globl relocate_kernel_len
+ relocate_kernel_len:
+ .quad relocate_kernel_end - relocate_kernel
+
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index df83215beac3..b6d740ac0e6e 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -198,11 +198,11 @@ static void __init conmode_default(void)
char *ptr;
if (MACHINE_IS_VM) {
- __cpcmd("QUERY CONSOLE", query_buffer, 1024);
+ __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
ptr = strstr(query_buffer, "SUBCHANNEL =");
console_irq = simple_strtoul(ptr + 13, NULL, 16);
- __cpcmd("QUERY TERM", query_buffer, 1024);
+ __cpcmd("QUERY TERM", query_buffer, 1024, NULL);
ptr = strstr(query_buffer, "CONMODE");
/*
* Set the conmode to 3215 so that the device recognition
@@ -211,7 +211,7 @@ static void __init conmode_default(void)
* 3215 and the 3270 driver will try to access the console
* device (3215 as console and 3270 as normal tty).
*/
- __cpcmd("TERM CONMODE 3215", NULL, 0);
+ __cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
if (ptr == NULL) {
#if defined(CONFIG_SCLP_CONSOLE)
SET_CONSOLE_SCLP;
@@ -414,7 +414,8 @@ setup_lowcore(void)
lc->program_new_psw.mask = PSW_KERNEL_BITS;
lc->program_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
- lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
+ lc->mcck_new_psw.mask =
+ PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
lc->mcck_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
lc->io_new_psw.mask = PSW_KERNEL_BITS;
@@ -424,12 +425,18 @@ setup_lowcore(void)
lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
lc->async_stack = (unsigned long)
__alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
-#ifdef CONFIG_CHECK_STACK
lc->panic_stack = (unsigned long)
__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
-#endif
lc->current_task = (unsigned long) init_thread_union.thread_info.task;
lc->thread_info = (unsigned long) &init_thread_union;
+#ifndef CONFIG_ARCH_S390X
+ if (MACHINE_HAS_IEEE) {
+ lc->extended_save_area_addr = (__u32)
+ __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
+ /* enable extended save area */
+ ctl_set_bit(14, 29);
+ }
+#endif
#ifdef CONFIG_ARCH_S390X
if (MACHINE_HAS_DIAG44)
lc->diag44_opcode = 0x83000044;
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index fdfcf0488b49..642572a8e334 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -284,7 +284,7 @@ static void do_machine_restart(void * __unused)
* locks are always held disabled).
*/
if (MACHINE_IS_VM)
- cpcmd ("IPL", NULL, 0);
+ cpcmd ("IPL", NULL, 0, NULL);
else
reipl (0x10000 | S390_lowcore.ipl_device);
}
@@ -313,7 +313,7 @@ static void do_machine_halt(void * __unused)
if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) {
smp_send_stop();
if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
- cpcmd(vmhalt_cmd, NULL, 0);
+ cpcmd(vmhalt_cmd, NULL, 0, NULL);
signal_processor(smp_processor_id(),
sigp_stop_and_store_status);
}
@@ -332,7 +332,7 @@ static void do_machine_power_off(void * __unused)
if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) {
smp_send_stop();
if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
- cpcmd(vmpoff_cmd, NULL, 0);
+ cpcmd(vmpoff_cmd, NULL, 0, NULL);
signal_processor(smp_processor_id(),
sigp_stop_and_store_status);
}
@@ -679,12 +679,14 @@ __cpu_disable(void)
{
unsigned long flags;
ec_creg_mask_parms cr_parms;
+ int cpu = smp_processor_id();
spin_lock_irqsave(&smp_reserve_lock, flags);
- if (smp_cpu_reserved[smp_processor_id()] != 0) {
+ if (smp_cpu_reserved[cpu] != 0) {
spin_unlock_irqrestore(&smp_reserve_lock, flags);
return -EBUSY;
}
+ cpu_clear(cpu, cpu_online_map);
#ifdef CONFIG_PFAULT
/* Disable pfault pseudo page faults on this cpu. */
@@ -771,13 +773,24 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
*(lowcore_ptr[i]) = S390_lowcore;
lowcore_ptr[i]->async_stack = stack + (ASYNC_SIZE);
-#ifdef CONFIG_CHECK_STACK
stack = __get_free_pages(GFP_KERNEL,0);
if (stack == 0ULL)
panic("smp_boot_cpus failed to allocate memory\n");
lowcore_ptr[i]->panic_stack = stack + (PAGE_SIZE);
+#ifndef __s390x__
+ if (MACHINE_HAS_IEEE) {
+ lowcore_ptr[i]->extended_save_area_addr =
+ (__u32) __get_free_pages(GFP_KERNEL,0);
+ if (lowcore_ptr[i]->extended_save_area_addr == 0)
+ panic("smp_boot_cpus failed to "
+ "allocate memory\n");
+ }
#endif
}
+#ifndef __s390x__
+ if (MACHINE_HAS_IEEE)
+ ctl_set_bit(14, 29); /* enable extended save area */
+#endif
set_prefix((u32)(unsigned long) lowcore_ptr[smp_processor_id()]);
for_each_cpu(cpu)
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 515938628f82..a8668afb5f87 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -285,7 +285,7 @@ SYSCALL(sys_mq_timedsend,sys_mq_timedsend,compat_sys_mq_timedsend_wrapper)
SYSCALL(sys_mq_timedreceive,sys_mq_timedreceive,compat_sys_mq_timedreceive_wrapper)
SYSCALL(sys_mq_notify,sys_mq_notify,compat_sys_mq_notify_wrapper) /* 275 */
SYSCALL(sys_mq_getsetattr,sys_mq_getsetattr,compat_sys_mq_getsetattr_wrapper)
-NI_SYSCALL /* reserved for kexec */
+SYSCALL(sys_kexec_load,sys_kexec_load,compat_sys_kexec_load_wrapper)
SYSCALL(sys_add_key,sys_add_key,compat_sys_add_key_wrapper)
SYSCALL(sys_request_key,sys_request_key,compat_sys_request_key_wrapper)
SYSCALL(sys_keyctl,sys_keyctl,compat_sys_keyctl) /* 280 */
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 8b90e9528b91..bc7b7be7acbe 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -668,7 +668,10 @@ asmlinkage void space_switch_exception(struct pt_regs * regs, long int_code)
asmlinkage void kernel_stack_overflow(struct pt_regs * regs)
{
- die("Kernel stack overflow", regs, 0);
+ bust_spinlocks(1);
+ printk("Kernel stack overflow.\n");
+ show_regs(regs);
+ bust_spinlocks(0);
panic("Corrupt kernel stack, can't continue.");
}
@@ -732,7 +735,7 @@ void __init trap_init(void)
&ext_int_pfault);
#endif
#ifndef CONFIG_ARCH_S390X
- cpcmd("SET PAGEX ON", NULL, 0);
+ cpcmd("SET PAGEX ON", NULL, 0, NULL);
#endif
}
}
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c
index f5a5bc09b8fa..2d5cb1385753 100644
--- a/arch/s390/mm/cmm.c
+++ b/arch/s390/mm/cmm.c
@@ -21,7 +21,7 @@
#include <asm/uaccess.h>
static char *sender = "VMRMSVM";
-module_param(sender, charp, 0);
+module_param(sender, charp, 0400);
MODULE_PARM_DESC(sender,
"Guest name that may send SMSG messages (default VMRMSVM)");
diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index 648deed17e25..c5348108ca3c 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -576,8 +576,8 @@ segment_save(char *name)
segtype_string[seg->range[i].start & 0xff]);
}
sprintf(cmd2, "SAVESEG %s", name);
- cpcmd(cmd1, NULL, 0);
- cpcmd(cmd2, NULL, 0);
+ cpcmd(cmd1, NULL, 0, NULL);
+ cpcmd(cmd2, NULL, 0, NULL);
spin_unlock(&dcss_lock);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 20:42:47 +0100