aboutsummaryrefslogtreecommitdiff
path: root/arch/s390/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/Makefile2
-rw-r--r--arch/s390/kernel/cpcmd.c18
-rw-r--r--arch/s390/kernel/head.S21
-rw-r--r--arch/s390/kernel/head31.S8
-rw-r--r--arch/s390/kernel/head64.S17
-rw-r--r--arch/s390/kernel/ipl.c185
-rw-r--r--arch/s390/kernel/machine_kexec.c78
-rw-r--r--arch/s390/kernel/reipl.S17
-rw-r--r--arch/s390/kernel/reipl64.S16
-rw-r--r--arch/s390/kernel/relocate_kernel.S5
-rw-r--r--arch/s390/kernel/relocate_kernel64.S5
-rw-r--r--arch/s390/kernel/reset.S48
-rw-r--r--arch/s390/kernel/setup.c66
-rw-r--r--arch/s390/kernel/smp.c117
-rw-r--r--arch/s390/kernel/traps.c30
15 files changed, 337 insertions, 296 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index aa978978d3d..a81881c9b29 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -4,7 +4,7 @@
EXTRA_AFLAGS := -traditional
-obj-y := bitmap.o traps.o time.o process.o \
+obj-y := bitmap.o traps.o time.o process.o reset.o \
setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
semaphore.o s390_ext.o debug.o profile.o irq.o ipl.o
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c
index 1eae74e72f9..a5972f1541f 100644
--- a/arch/s390/kernel/cpcmd.c
+++ b/arch/s390/kernel/cpcmd.c
@@ -21,14 +21,15 @@ static DEFINE_SPINLOCK(cpcmd_lock);
static char cpcmd_buf[241];
/*
- * the caller of __cpcmd has to ensure that the response buffer is below 2 GB
+ * __cpcmd has some restrictions over cpcmd
+ * - the response buffer must reside below 2GB (if any)
+ * - __cpcmd is unlocked and therefore not SMP-safe
*/
int __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
{
- unsigned long flags, cmdlen;
+ unsigned cmdlen;
int return_code, return_len;
- spin_lock_irqsave(&cpcmd_lock, flags);
cmdlen = strlen(cmd);
BUG_ON(cmdlen > 240);
memcpy(cpcmd_buf, cmd, cmdlen);
@@ -74,7 +75,6 @@ int __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
: "+d" (reg3) : "d" (reg2) : "cc");
return_code = (int) reg3;
}
- spin_unlock_irqrestore(&cpcmd_lock, flags);
if (response_code != NULL)
*response_code = return_code;
return return_len;
@@ -82,15 +82,18 @@ int __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
EXPORT_SYMBOL(__cpcmd);
-#ifdef CONFIG_64BIT
int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
{
char *lowbuf;
int len;
+ unsigned long flags;
if ((rlen == 0) || (response == NULL)
- || !((unsigned long)response >> 31))
+ || !((unsigned long)response >> 31)) {
+ spin_lock_irqsave(&cpcmd_lock, flags);
len = __cpcmd(cmd, response, rlen, response_code);
+ spin_unlock_irqrestore(&cpcmd_lock, flags);
+ }
else {
lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
if (!lowbuf) {
@@ -98,7 +101,9 @@ int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
"cpcmd: could not allocate response buffer\n");
return -ENOMEM;
}
+ spin_lock_irqsave(&cpcmd_lock, flags);
len = __cpcmd(cmd, lowbuf, rlen, response_code);
+ spin_unlock_irqrestore(&cpcmd_lock, flags);
memcpy(response, lowbuf, rlen);
kfree(lowbuf);
}
@@ -106,4 +111,3 @@ int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
}
EXPORT_SYMBOL(cpcmd);
-#endif /* CONFIG_64BIT */
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 0cf59bb7a85..8f8c802f1bc 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -418,24 +418,6 @@ start:
.gotr:
l %r10,.tbl # EBCDIC to ASCII table
tr 0(240,%r8),0(%r10)
- stidp __LC_CPUID # Are we running on VM maybe
- cli __LC_CPUID,0xff
- bnz .test
- .long 0x83300060 # diag 3,0,x'0060' - storage size
- b .done
-.test:
- mvc 0x68(8),.pgmnw # set up pgm check handler
- l %r2,.fourmeg
- lr %r3,%r2
- bctr %r3,%r0 # 4M-1
-.loop: iske %r0,%r3
- ar %r3,%r2
-.pgmx:
- sr %r3,%r2
- la %r3,1(%r3)
-.done:
- l %r1,.memsize
- st %r3,ARCH_OFFSET(%r1)
slr %r0,%r0
st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11)
st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11)
@@ -443,9 +425,6 @@ start:
.tbl: .long _ebcasc # translate table
.cmd: .long COMMAND_LINE # address of command line buffer
.parm: .long PARMAREA
-.memsize: .long memory_size
-.fourmeg: .long 0x00400000 # 4M
-.pgmnw: .long 0x00080000,.pgmx
.lowcase:
.byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
.byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index 0a2c929486a..4388b3309e0 100644
--- a/arch/s390/kernel/head31.S
+++ b/arch/s390/kernel/head31.S
@@ -131,10 +131,11 @@ startup_continue:
.long init_thread_union
.Lpmask:
.byte 0
-.align 8
+ .align 8
.Lpcext:.long 0x00080000,0x80000000
.Lcr:
.long 0x00 # place holder for cr0
+ .align 8
.Lwaitsclp:
.long 0x010a0000,0x80000000 + .Lsclph
.Lrcp:
@@ -156,7 +157,7 @@ startup_continue:
slr %r4,%r4 # set start of chunk to zero
slr %r5,%r5 # set end of chunk to zero
slr %r6,%r6 # set access code to zero
- la %r10, MEMORY_CHUNKS # number of chunks
+ la %r10,MEMORY_CHUNKS # number of chunks
.Lloop:
tprot 0(%r5),0 # test protection of first byte
ipm %r7
@@ -176,8 +177,6 @@ startup_continue:
st %r0,4(%r3) # store size of chunk
st %r6,8(%r3) # store type of chunk
la %r3,12(%r3)
- l %r4,.Lmemsize-.LPG1(%r13) # address of variable memory_size
- st %r5,0(%r4) # store last end to memory size
ahi %r10,-1 # update chunk number
.Lchkloop:
lr %r6,%r7 # set access code to last cc
@@ -292,7 +291,6 @@ startup_continue:
.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
.Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte
.Lpcdiag9c:.long 0x00080000,0x80000000 + .Lchkdiag9c
-.Lmemsize:.long memory_size
.Lmchunk:.long memory_chunk
.Lmflags:.long machine_flags
.Lbss_bgn: .long __bss_start
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 42f54d48244..c526279e112 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -70,7 +70,20 @@ startup_continue:
sgr %r5,%r5 # set src,length and pad to zero
mvcle %r2,%r4,0 # clear mem
jo .-4 # branch back, if not finish
+ # set program check new psw mask
+ mvc __LC_PGM_NEW_PSW(8),.Lpcmsk-.LPG1(%r13)
+ larl %r1,.Lslowmemdetect # set program check address
+ stg %r1,__LC_PGM_NEW_PSW+8
+ lghi %r1,0xc
+ diag %r0,%r1,0x260 # get memory size of virtual machine
+ cgr %r0,%r1 # different? -> old detection routine
+ jne .Lslowmemdetect
+ aghi %r1,1 # size is one more than end
+ larl %r2,memory_chunk
+ stg %r1,8(%r2) # store size of chunk
+ j .Ldonemem
+.Lslowmemdetect:
l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
.Lservicecall:
stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
@@ -139,8 +152,6 @@ startup_continue:
.int 0x100000
.Lfchunk:
- # set program check new psw mask
- mvc __LC_PGM_NEW_PSW(8),.Lpcmsk-.LPG1(%r13)
#
# find memory chunks.
@@ -175,8 +186,6 @@ startup_continue:
stg %r0,8(%r3) # store size of chunk
st %r6,20(%r3) # store type of chunk
la %r3,24(%r3)
- larl %r8,memory_size
- stg %r5,0(%r8) # store memory size
ahi %r10,-1 # update chunk number
.Lchkloop:
lr %r6,%r7 # set access code to last cc
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 1f5e782b3d0..a36bea1188d 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -13,12 +13,21 @@
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/reboot.h>
+#include <linux/ctype.h>
#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/cpcmd.h>
#include <asm/cio.h>
+#include <asm/ebcdic.h>
+#include <asm/reset.h>
#define IPL_PARM_BLOCK_VERSION 0
+#define LOADPARM_LEN 8
+
+extern char s390_readinfo_sccb[];
+#define SCCB_VALID (*((__u16*)&s390_readinfo_sccb[6]) == 0x0010)
+#define SCCB_LOADPARM (&s390_readinfo_sccb[24])
+#define SCCB_FLAG (s390_readinfo_sccb[91])
enum ipl_type {
IPL_TYPE_NONE = 1,
@@ -289,9 +298,25 @@ static struct attribute_group ipl_fcp_attr_group = {
/* CCW ipl device attributes */
+static ssize_t ipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
+{
+ char loadparm[LOADPARM_LEN + 1] = {};
+
+ if (!SCCB_VALID)
+ return sprintf(page, "#unknown#\n");
+ memcpy(loadparm, SCCB_LOADPARM, LOADPARM_LEN);
+ EBCASC(loadparm, LOADPARM_LEN);
+ strstrip(loadparm);
+ return sprintf(page, "%s\n", loadparm);
+}
+
+static struct subsys_attribute sys_ipl_ccw_loadparm_attr =
+ __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
+
static struct attribute *ipl_ccw_attrs[] = {
&sys_ipl_type_attr.attr,
&sys_ipl_device_attr.attr,
+ &sys_ipl_ccw_loadparm_attr.attr,
NULL,
};
@@ -348,8 +373,57 @@ static struct attribute_group reipl_fcp_attr_group = {
DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
reipl_block_ccw->ipl_info.ccw.devno);
+static void reipl_get_ascii_loadparm(char *loadparm)
+{
+ memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
+ LOADPARM_LEN);
+ EBCASC(loadparm, LOADPARM_LEN);
+ loadparm[LOADPARM_LEN] = 0;
+ strstrip(loadparm);
+}
+
+static ssize_t reipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
+{
+ char buf[LOADPARM_LEN + 1];
+
+ reipl_get_ascii_loadparm(buf);
+ return sprintf(page, "%s\n", buf);
+}
+
+static ssize_t reipl_ccw_loadparm_store(struct subsystem *subsys,
+ const char *buf, size_t len)
+{
+ int i, lp_len;
+
+ /* ignore trailing newline */
+ lp_len = len;
+ if ((len > 0) && (buf[len - 1] == '\n'))
+ lp_len--;
+ /* loadparm can have max 8 characters and must not start with a blank */
+ if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
+ return -EINVAL;
+ /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
+ for (i = 0; i < lp_len; i++) {
+ if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
+ (buf[i] == '.'))
+ continue;
+ return -EINVAL;
+ }
+ /* initialize loadparm with blanks */
+ memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
+ /* copy and convert to ebcdic */
+ memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
+ ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
+ return len;
+}
+
+static struct subsys_attribute sys_reipl_ccw_loadparm_attr =
+ __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
+ reipl_ccw_loadparm_store);
+
static struct attribute *reipl_ccw_attrs[] = {
&sys_reipl_ccw_device_attr.attr,
+ &sys_reipl_ccw_loadparm_attr.attr,
NULL,
};
@@ -502,23 +576,6 @@ static struct subsys_attribute dump_type_attr =
static decl_subsys(dump, NULL, NULL);
-#ifdef CONFIG_SMP
-static void dump_smp_stop_all(void)
-{
- int cpu;
- preempt_disable();
- for_each_online_cpu(cpu) {
- if (cpu == smp_processor_id())
- continue;
- while (signal_processor(cpu, sigp_stop) == sigp_busy)
- udelay(10);
- }
- preempt_enable();
-}
-#else
-#define dump_smp_stop_all() do { } while (0)
-#endif
-
/*
* Shutdown actions section
*/
@@ -571,11 +628,14 @@ void do_reipl(void)
{
struct ccw_dev_id devid;
static char buf[100];
+ char loadparm[LOADPARM_LEN + 1];
switch (reipl_type) {
case IPL_TYPE_CCW:
+ reipl_get_ascii_loadparm(loadparm);
printk(KERN_EMERG "reboot on ccw device: 0.0.%04x\n",
reipl_block_ccw->ipl_info.ccw.devno);
+ printk(KERN_EMERG "loadparm = '%s'\n", loadparm);
break;
case IPL_TYPE_FCP:
printk(KERN_EMERG "reboot on fcp device:\n");
@@ -588,12 +648,19 @@ void do_reipl(void)
switch (reipl_method) {
case IPL_METHOD_CCW_CIO:
devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
+ if (ipl_get_type() == IPL_TYPE_CCW && devid.devno == ipl_devno)
+ diag308(DIAG308_IPL, NULL);
devid.ssid = 0;
reipl_ccw_dev(&devid);
break;
case IPL_METHOD_CCW_VM:
- sprintf(buf, "IPL %X", reipl_block_ccw->ipl_info.ccw.devno);
- cpcmd(buf, NULL, 0, NULL);
+ if (strlen(loadparm) == 0)
+ sprintf(buf, "IPL %X",
+ reipl_block_ccw->ipl_info.ccw.devno);
+ else
+ sprintf(buf, "IPL %X LOADPARM '%s'",
+ reipl_block_ccw->ipl_info.ccw.devno, loadparm);
+ __cpcmd(buf, NULL, 0, NULL);
break;
case IPL_METHOD_CCW_DIAG:
diag308(DIAG308_SET, reipl_block_ccw);
@@ -607,16 +674,17 @@ void do_reipl(void)
diag308(DIAG308_IPL, NULL);
break;
case IPL_METHOD_FCP_RO_VM:
- cpcmd("IPL", NULL, 0, NULL);
+ __cpcmd("IPL", NULL, 0, NULL);
break;
case IPL_METHOD_NONE:
default:
if (MACHINE_IS_VM)
- cpcmd("IPL", NULL, 0, NULL);
+ __cpcmd("IPL", NULL, 0, NULL);
diag308(DIAG308_IPL, NULL);
break;
}
- panic("reipl failed!\n");
+ printk(KERN_EMERG "reboot failed!\n");
+ signal_processor(smp_processor_id(), sigp_stop_and_store_status);
}
static void do_dump(void)
@@ -639,17 +707,17 @@ static void do_dump(void)
switch (dump_method) {
case IPL_METHOD_CCW_CIO:
- dump_smp_stop_all();
+ smp_send_stop();
devid.devno = dump_block_ccw->ipl_info.ccw.devno;
devid.ssid = 0;
reipl_ccw_dev(&devid);
break;
case IPL_METHOD_CCW_VM:
- dump_smp_stop_all();
+ smp_send_stop();
sprintf(buf, "STORE STATUS");
- cpcmd(buf, NULL, 0, NULL);
+ __cpcmd(buf, NULL, 0, NULL);
sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
- cpcmd(buf, NULL, 0, NULL);
+ __cpcmd(buf, NULL, 0, NULL);
break;
case IPL_METHOD_CCW_DIAG:
diag308(DIAG308_SET, dump_block_ccw);
@@ -746,6 +814,17 @@ static int __init reipl_ccw_init(void)
reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
reipl_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
+ /* check if read scp info worked and set loadparm */
+ if (SCCB_VALID)
+ memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
+ SCCB_LOADPARM, LOADPARM_LEN);
+ else
+ /* read scp info failed: set empty loadparm (EBCDIC blanks) */
+ memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
+ LOADPARM_LEN);
+ /* FIXME: check for diag308_set_works when enabling diag ccw reipl */
+ if (!MACHINE_IS_VM)
+ sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
if (ipl_get_type() == IPL_TYPE_CCW)
reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
reipl_capabilities |= IPL_TYPE_CCW;
@@ -827,13 +906,11 @@ static int __init dump_ccw_init(void)
return 0;
}
-extern char s390_readinfo_sccb[];
-
static int __init dump_fcp_init(void)
{
int rc;
- if(!(s390_readinfo_sccb[91] & 0x2))
+ if(!(SCCB_FLAG & 0x2) || !SCCB_VALID)
return 0; /* LDIPL DUMP is not installed */
if (!diag308_set_works)
return 0;
@@ -931,3 +1008,53 @@ static int __init s390_ipl_init(void)
}
__initcall(s390_ipl_init);
+
+static LIST_HEAD(rcall);
+static DEFINE_MUTEX(rcall_mutex);
+
+void register_reset_call(struct reset_call *reset)
+{
+ mutex_lock(&rcall_mutex);
+ list_add(&reset->list, &rcall);
+ mutex_unlock(&rcall_mutex);
+}
+EXPORT_SYMBOL_GPL(register_reset_call);
+
+void unregister_reset_call(struct reset_call *reset)
+{
+ mutex_lock(&rcall_mutex);
+ list_del(&reset->list);
+ mutex_unlock(&rcall_mutex);
+}
+EXPORT_SYMBOL_GPL(unregister_reset_call);
+
+static void do_reset_calls(void)
+{
+ struct reset_call *reset;
+
+ list_for_each_entry(reset, &rcall, list)
+ reset->fn();
+}
+
+extern void reset_mcck_handler(void);
+
+void s390_reset_system(void)
+{
+ struct _lowcore *lc;
+
+ /* Stack for interrupt/machine check handler */
+ lc = (struct _lowcore *)(unsigned long) store_prefix();
+ lc->panic_stack = S390_lowcore.panic_stack;
+
+ /* Disable prefixing */
+ set_prefix(0);
+
+ /* Disable lowcore protection */
+ __ctl_clear_bit(0,28);
+
+ /* Set new machine check handler */
+ S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS & ~PSW_MASK_MCHECK;
+ S390_lowcore.mcck_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) &reset_mcck_handler;
+ do_reset_calls();
+}
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 60b1ea9f946..f6d9bcc0f75 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -1,15 +1,10 @@
/*
* arch/s390/kernel/machine_kexec.c
*
- * (C) Copyright IBM Corp. 2005
+ * Copyright IBM Corp. 2005,2006
*
- * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
- *
- */
-
-/*
- * s390_machine_kexec.c - handle the transition of Linux booting another kernel
- * on the S390 architecture.
+ * Author(s): Rolf Adelsberger,
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/device.h>
@@ -22,86 +17,49 @@
#include <asm/pgalloc.h>
#include <asm/system.h>
#include <asm/smp.h>
+#include <asm/reset.h>
-static void kexec_halt_all_cpus(void *);
-
-typedef void (*relocate_kernel_t) (kimage_entry_t *, unsigned long);
+typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long);
extern const unsigned char relocate_kernel[];
extern const unsigned long long relocate_kernel_len;
-int
-machine_kexec_prepare(struct kimage *image)
+int machine_kexec_prepare(struct kimage *image)
{
- unsigned long reboot_code_buffer;
+ void *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;
+ reboot_code_buffer = (void *) page_to_phys(image->control_code_page);
/* Then copy it */
- memcpy((void *) reboot_code_buffer, relocate_kernel,
- relocate_kernel_len);
+ memcpy(reboot_code_buffer, relocate_kernel, relocate_kernel_len);
return 0;
}
-void
-machine_kexec_cleanup(struct kimage *image)
+void machine_kexec_cleanup(struct kimage *image)
{
}
-void
-machine_shutdown(void)
+void machine_shutdown(void)
{
printk(KERN_INFO "kexec: machine_shutdown called\n");
}
-NORET_TYPE void
-machine_kexec(struct kimage *image)
+void machine_kexec(struct kimage *image)
{
- clear_all_subchannels();
- cio_reset_channel_paths();
-
- /* Disable lowcore protection */
- ctl_clear_bit(0,28);
-
- on_each_cpu(kexec_halt_all_cpus, image, 0, 0);
- for (;;);
-}
-
-extern void pfault_fini(void);
-
-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;
-#ifdef CONFIG_PFAULT
- if (MACHINE_IS_VM)
- pfault_fini();
-#endif
+ smp_send_stop();
+ pfault_fini();
+ s390_reset_system();
- if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) != -1)
- 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);
+ data_mover = (relocate_kernel_t) page_to_phys(image->control_code_page);
/* Call the moving routine */
- (*data_mover) (&image->head, image->start);
+ (*data_mover)(&image->head, image->start);
+ for (;;);
}
diff --git a/arch/s390/kernel/reipl.S b/arch/s390/kernel/reipl.S
index 0340477f3b0..f9434d42ce9 100644
--- a/arch/s390/kernel/reipl.S
+++ b/arch/s390/kernel/reipl.S
@@ -11,19 +11,10 @@
.globl do_reipl_asm
do_reipl_asm: basr %r13,0
.Lpg0: lpsw .Lnewpsw-.Lpg0(%r13)
-
- # switch off lowcore protection
-
-.Lpg1: stctl %c0,%c0,.Lctlsave1-.Lpg0(%r13)
- stctl %c0,%c0,.Lctlsave2-.Lpg0(%r13)
- ni .Lctlsave1-.Lpg0(%r13),0xef
- lctl %c0,%c0,.Lctlsave1-.Lpg0(%r13)
-
- # do store status of all registers
+.Lpg1: # do store status of all registers
stm %r0,%r15,__LC_GPREGS_SAVE_AREA
stctl %c0,%c15,__LC_CREGS_SAVE_AREA
- mvc __LC_CREGS_SAVE_AREA(4),.Lctlsave2-.Lpg0(%r13)
stam %a0,%a15,__LC_AREGS_SAVE_AREA
stpx __LC_PREFIX_SAVE_AREA
stckc .Lclkcmp-.Lpg0(%r13)
@@ -56,8 +47,7 @@ do_reipl_asm: basr %r13,0
.L002: tm .Liplirb+8-.Lpg0(%r13),0xf3
jz .L003
bas %r14,.Ldisab-.Lpg0(%r13)
-.L003: spx .Lnull-.Lpg0(%r13)
- st %r1,__LC_SUBCHANNEL_ID
+.L003: st %r1,__LC_SUBCHANNEL_ID
lpsw 0
sigp 0,0,0(6)
.Ldisab: st %r14,.Ldispsw+4-.Lpg0(%r13)
@@ -65,9 +55,6 @@ do_reipl_asm: basr %r13,0
.align 8
.Lclkcmp: .quad 0x0000000000000000
.Lall: .long 0xff000000
-.Lnull: .long 0x00000000
-.Lctlsave1: .long 0x00000000
-.Lctlsave2: .long 0x00000000
.align 8
.Lnewpsw: .long 0x00080000,0x80000000+.Lpg1
.Lpcnew: .long 0x00080000,0x80000000+.Lecs
diff --git a/arch/s390/kernel/reipl64.S b/arch/s390/kernel/reipl64.S
index de7435054f7..f18ef260ca2 100644
--- a/arch/s390/kernel/reipl64.S
+++ b/arch/s390/kernel/reipl64.S
@@ -10,10 +10,10 @@
#include <asm/lowcore.h>
.globl do_reipl_asm
do_reipl_asm: basr %r13,0
+.Lpg0: lpswe .Lnewpsw-.Lpg0(%r13)
+.Lpg1: # do store status of all registers
- # do store status of all registers
-
-.Lpg0: stg %r1,.Lregsave-.Lpg0(%r13)
+ stg %r1,.Lregsave-.Lpg0(%r13)
lghi %r1,0x1000
stmg %r0,%r15,__LC_GPREGS_SAVE_AREA-0x1000(%r1)
lg %r0,.Lregsave-.Lpg0(%r13)
@@ -27,11 +27,7 @@ do_reipl_asm: basr %r13,0
stpt __LC_CPU_TIMER_SAVE_AREA-0x1000(%r1)
stg %r13, __LC_PSW_SAVE_AREA-0x1000+8(%r1)
- lpswe .Lnewpsw-.Lpg0(%r13)
-.Lpg1: lctlg %c6,%c6,.Lall-.Lpg0(%r13)
- stctg %c0,%c0,.Lregsave-.Lpg0(%r13)
- ni .Lregsave+4-.Lpg0(%r13),0xef
- lctlg %c0,%c0,.Lregsave-.Lpg0(%r13)
+ lctlg %c6,%c6,.Lall-.Lpg0(%r13)
lgr %r1,%r2
mvc __LC_PGM_NEW_PSW(16),.Lpcnew-.Lpg0(%r13)
stsch .Lschib-.Lpg0(%r13)
@@ -56,8 +52,7 @@ do_reipl_asm: basr %r13,0
.L002: tm .Liplirb+8-.Lpg0(%r13),0xf3
jz .L003
bas %r14,.Ldisab-.Lpg0(%r13)
-.L003: spx .Lnull-.Lpg0(%r13)
- st %r1,__LC_SUBCHANNEL_ID
+.L003: st %r1,__LC_SUBCHANNEL_ID
lhi %r1,0 # mode 0 = esa
slr %r0,%r0 # set cpuid to zero
sigp %r1,%r0,0x12 # switch to esa mode
@@ -70,7 +65,6 @@ do_reipl_asm: basr %r13,0
.Lclkcmp: .quad 0x0000000000000000
.Lall: .quad 0x00000000ff000000
.Lregsave: .quad 0x0000000000000000
-.Lnull: .long 0x0000000000000000
.align 16
/*
* These addresses have to be 31 bit otherwise
diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S
index f9899ff2e5b..3b456b80bce 100644
--- a/arch/s390/kernel/relocate_kernel.S
+++ b/arch/s390/kernel/relocate_kernel.S
@@ -26,8 +26,7 @@
relocate_kernel:
basr %r13,0 # base address
.base:
- stnsm sys_msk-.base(%r13),0xf8 # disable DAT and IRQ (external)
- spx zero64-.base(%r13) # absolute addressing mode
+ stnsm sys_msk-.base(%r13),0xfb # disable DAT
stctl %c0,%c15,ctlregs-.base(%r13)
stm %r0,%r15,gprregs-.base(%r13)
la %r1,load_psw-.base(%r13)
@@ -97,8 +96,6 @@
lpsw 0 # hopefully start new kernel...
.align 8
- zero64:
- .quad 0
load_psw:
.long 0x00080000,0x80000000
sys_msk:
diff --git a/arch/s390/kernel/relocate_kernel64.S b/arch/s390/kernel/relocate_kernel64.S
index 4fb443042d9..1f9ea2067b5 100644
--- a/arch/s390/kernel/relocate_kernel64.S
+++ b/arch/s390/kernel/relocate_kernel64.S
@@ -27,8 +27,7 @@
relocate_kernel:
basr %r13,0 # base address
.base:
- stnsm sys_msk-.base(%r13),0xf8 # disable DAT and IRQs
- spx zero64-.base(%r13) # absolute addressing mode
+ stnsm sys_msk-.base(%r13),0xfb # disable DAT
stctg %c0,%c15,ctlregs-.base(%r13)
stmg %r0,%r15,gprregs-.base(%r13)
lghi %r0,3
@@ -100,8 +99,6 @@
lpsw 0 # hopefully start new kernel...
.align 8
- zero64:
- .quad 0
load_psw:
.long 0x00080000,0x80000000
sys_msk:
diff --git a/arch/s390/kernel/reset.S b/arch/s390/kernel/reset.S
new file mode 100644
index 00000000000..be8688c0665
--- /dev/null
+++ b/arch/s390/kernel/reset.S
@@ -0,0 +1,48 @@
+/*
+ * arch/s390/kernel/reset.S
+ *
+ * Copyright (C) IBM Corp. 2006
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ */
+
+#include <asm/ptrace.h>
+#include <asm/lowcore.h>
+
+#ifdef CONFIG_64BIT
+
+ .globl reset_mcck_handler
+reset_mcck_handler:
+ basr %r13,0
+0: lg %r15,__LC_PANIC_STACK # load panic stack
+ aghi %r15,-STACK_FRAME_OVERHEAD
+ lg %r1,s390_reset_mcck_handler-0b(%r13)
+ ltgr %r1,%r1
+ jz 1f
+ basr %r14,%r1
+1: la %r1,4095
+ lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
+ lpswe __LC_MCK_OLD_PSW
+
+ .globl s390_reset_mcck_handler
+s390_reset_mcck_handler:
+ .quad 0
+
+#else /* CONFIG_64BIT */
+
+ .globl reset_mcck_handler
+reset_mcck_handler:
+ basr %r13,0
+0: l %r15,__LC_PANIC_STACK # load panic stack
+ ahi %r15,-STACK_FRAME_OVERHEAD
+ l %r1,s390_reset_mcck_handler-0b(%r13)
+ ltr %r1,%r1
+ jz 1f
+ basr %r14,%r1
+1: lm %r0,%r15,__LC_GPREGS_SAVE_AREA
+ lpsw __LC_MCK_OLD_PSW
+
+ .globl s390_reset_mcck_handler
+s390_reset_mcck_handler:
+ .long 0
+
+#endif /* CONFIG_64BIT */
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 2aa13e8e000..b928fecdc74 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -62,13 +62,9 @@ EXPORT_SYMBOL_GPL(uaccess);
unsigned int console_mode = 0;
unsigned int console_devno = -1;
unsigned int console_irq = -1;
-unsigned long memory_size = 0;
unsigned long machine_flags = 0;
-struct {
- unsigned long addr, size, type;
-} memory_chunk[MEMORY_CHUNKS] = { { 0 } };
-#define CHUNK_READ_WRITE 0
-#define CHUNK_READ_ONLY 1
+
+struct mem_chunk memory_chunk[MEMORY_CHUNKS];
volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
unsigned long __initdata zholes_size[MAX_NR_ZONES];
static unsigned long __initdata memory_end;
@@ -229,11 +225,11 @@ static void __init conmode_default(void)
char *ptr;
if (MACHINE_IS_VM) {
- __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
+ 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, NULL);
+ cpcmd("QUERY TERM", query_buffer, 1024, NULL);
ptr = strstr(query_buffer, "CONMODE");
/*
* Set the conmode to 3215 so that the device recognition
@@ -242,7 +238,7 @@ 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, NULL);
+ cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
if (ptr == NULL) {
#if defined(CONFIG_SCLP_CONSOLE)
SET_CONSOLE_SCLP;
@@ -299,14 +295,14 @@ static void do_machine_restart_nonsmp(char * __unused)
static void do_machine_halt_nonsmp(void)
{
if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
- cpcmd(vmhalt_cmd, NULL, 0, NULL);
+ __cpcmd(vmhalt_cmd, NULL, 0, NULL);
signal_processor(smp_processor_id(), sigp_stop_and_store_status);
}
static void do_machine_power_off_nonsmp(void)
{
if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
- cpcmd(vmpoff_cmd, NULL, 0, NULL);
+ __cpcmd(vmpoff_cmd, NULL, 0, NULL);
signal_processor(smp_processor_id(), sigp_stop_and_store_status);
}
@@ -489,6 +485,37 @@ setup_resources(void)
}
}
+static void __init setup_memory_end(void)
+{
+ unsigned long real_size, memory_size;
+ unsigned long max_mem, max_phys;
+ int i;
+
+ memory_size = real_size = 0;
+ max_phys = VMALLOC_END - VMALLOC_MIN_SIZE;
+ memory_end &= PAGE_MASK;
+
+ max_mem = memory_end ? min(max_phys, memory_end) : max_phys;
+
+ for (i = 0; i < MEMORY_CHUNKS; i++) {
+ struct mem_chunk *chunk = &memory_chunk[i];
+
+ real_size = max(real_size, chunk->addr + chunk->size);
+ if (chunk->addr >= max_mem) {
+ memset(chunk, 0, sizeof(*chunk));
+ continue;
+ }
+ if (chunk->addr + chunk->size > max_mem)
+ chunk->size = max_mem - chunk->addr;
+ memory_size = max(memory_size, chunk->addr + chunk->size);
+ }
+ if (!memory_end)
+ memory_end = memory_size;
+ if (real_size > memory_end)
+ printk("More memory detected than supported. Unused: %luk\n",
+ (real_size - memory_end) >> 10);
+}
+
static void __init
setup_memory(void)
{
@@ -645,8 +672,6 @@ setup_arch(char **cmdline_p)
init_mm.end_data = (unsigned long) &_edata;
init_mm.brk = (unsigned long) &_end;
- memory_end = memory_size;
-
if (MACHINE_HAS_MVCOS)
memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess));
else
@@ -654,20 +679,7 @@ setup_arch(char **cmdline_p)
parse_early_param();
-#ifndef CONFIG_64BIT
- memory_end &= ~0x400000UL;
-
- /*
- * We need some free virtual space to be able to do vmalloc.
- * On a machine with 2GB memory we make sure that we have at
- * least 128 MB free space for vmalloc.
- */
- if (memory_end > 1920*1024*1024)
- memory_end = 1920*1024*1024;
-#else /* CONFIG_64BIT */
- memory_end &= ~0x200000UL;
-#endif /* CONFIG_64BIT */
-
+ setup_memory_end();
setup_memory();
setup_resources();
setup_lowcore();
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 62822245f9b..19090f7d4f5 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -230,18 +230,37 @@ static inline void do_store_status(void)
}
}
+static inline void do_wait_for_stop(void)
+{
+ int cpu;
+
+ /* 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();
+ }
+}
+
/*
* this function sends a 'stop' sigp to all other CPUs in the system.
* it goes straight through.
*/
void smp_send_stop(void)
{
+ /* Disable all interrupts/machine checks */
+ __load_psw_mask(PSW_KERNEL_BITS & ~PSW_MASK_MCHECK);
+
/* write magic number to zero page (absolute 0) */
lowcore_ptr[smp_processor_id()]->panic_magic = __PANIC_MAGIC;
/* stop other processors. */
do_send_stop();
+ /* wait until other processors are stopped */
+ do_wait_for_stop();
+
/* store status of other processors. */
do_store_status();
}
@@ -250,88 +269,28 @@ void smp_send_stop(void)
* Reboot, halt and power_off routines for SMP.
*/
-static void do_machine_restart(void * __unused)
-{
- int cpu;
- static atomic_t cpuid = ATOMIC_INIT(-1);
-
- if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) != -1)
- 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();
- }
-
- /* Store status of other cpus. */
- do_store_status();
-
- /*
- * Finally call reipl. Because we waited for all other
- * cpus to enter this function we know that they do
- * not hold any s390irq-locks (the cpus have been
- * interrupted by an external interrupt and s390irq
- * locks are always held disabled).
- */
- do_reipl();
-}
-
void machine_restart_smp(char * __unused)
{
- on_each_cpu(do_machine_restart, NULL, 0, 0);
-}
-
-static void do_wait_for_stop(void)
-{
- unsigned long cr[16];
-
- __ctl_store(cr, 0, 15);
- cr[0] &= ~0xffff;
- cr[6] = 0;
- __ctl_load(cr, 0, 15);
- for (;;)
- enabled_wait();
-}
-
-static void do_machine_halt(void * __unused)
-{
- static atomic_t cpuid = ATOMIC_INIT(-1);
-
- if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) == -1) {
- smp_send_stop();
- if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
- cpcmd(vmhalt_cmd, NULL, 0, NULL);
- signal_processor(smp_processor_id(),
- sigp_stop_and_store_status);
- }
- do_wait_for_stop();
+ smp_send_stop();
+ do_reipl();
}
void machine_halt_smp(void)
{
- on_each_cpu(do_machine_halt, NULL, 0, 0);
-}
-
-static void do_machine_power_off(void * __unused)
-{
- static atomic_t cpuid = ATOMIC_INIT(-1);
-
- if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) == -1) {
- smp_send_stop();
- if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
- cpcmd(vmpoff_cmd, NULL, 0, NULL);
- signal_processor(smp_processor_id(),
- sigp_stop_and_store_status);
- }
- do_wait_for_stop();
+ smp_send_stop();
+ if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
+ __cpcmd(vmhalt_cmd, NULL, 0, NULL);
+ signal_processor(smp_processor_id(), sigp_stop_and_store_status);
+ for (;;);
}
void machine_power_off_smp(void)
{
- on_each_cpu(do_machine_power_off, NULL, 0, 0);
+ smp_send_stop();
+ if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
+ __cpcmd(vmpoff_cmd, NULL, 0, NULL);
+ signal_processor(smp_processor_id(), sigp_stop_and_store_status);
+ for (;;);
}
/*
@@ -501,8 +460,6 @@ __init smp_count_cpus(void)
*/
extern void init_cpu_timer(void);
extern void init_cpu_vtimer(void);
-extern int pfault_init(void);
-extern void pfault_fini(void);
int __devinit start_secondary(void *cpuvoid)
{
@@ -514,11 +471,9 @@ int __devinit start_secondary(void *cpuvoid)
#ifdef CONFIG_VIRT_TIMER
init_cpu_vtimer();
#endif
-#ifdef CONFIG_PFAULT
/* Enable pfault pseudo page faults on this cpu. */
- if (MACHINE_IS_VM)
- pfault_init();
-#endif
+ pfault_init();
+
/* Mark this cpu as online */
cpu_set(smp_processor_id(), cpu_online_map);
/* Switch on interrupts */
@@ -708,11 +663,8 @@ __cpu_disable(void)
}
cpu_clear(cpu, cpu_online_map);
-#ifdef CONFIG_PFAULT
/* Disable pfault pseudo page faults on this cpu. */
- if (MACHINE_IS_VM)
- pfault_fini();
-#endif
+ pfault_fini();
memset(&cr_parms.orvals, 0, sizeof(cr_parms.orvals));
memset(&cr_parms.andvals, 0xff, sizeof(cr_parms.andvals));
@@ -860,4 +812,3 @@ EXPORT_SYMBOL(smp_ctl_clear_bit);
EXPORT_SYMBOL(smp_call_function);
EXPORT_SYMBOL(smp_get_cpu);
EXPORT_SYMBOL(smp_put_cpu);
-
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 92ecffbc8d8..3cbb0dcf1f1 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -58,12 +58,6 @@ int sysctl_userprocess_debug = 0;
extern pgm_check_handler_t do_protection_exception;
extern pgm_check_handler_t do_dat_exception;
-#ifdef CONFIG_PFAULT
-extern int pfault_init(void);
-extern void pfault_fini(void);
-extern void pfault_interrupt(__u16 error_code);
-static ext_int_info_t ext_int_pfault;
-#endif
extern pgm_check_handler_t do_monitor_call;
#define stack_pointer ({ void **sp; asm("la %0,0(15)" : "=&d" (sp)); sp; })
@@ -135,7 +129,7 @@ __show_trace(unsigned long sp, unsigned long low, unsigned long high)
}
}
-void show_trace(struct task_struct *task, unsigned long * stack)
+void show_trace(struct task_struct *task, unsigned long *stack)
{
register unsigned long __r15 asm ("15");
unsigned long sp;
@@ -157,6 +151,9 @@ void show_trace(struct task_struct *task, unsigned long * stack)
__show_trace(sp, S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
printk("\n");
+ if (!task)
+ task = current;
+ debug_show_held_locks(task);
}
void show_stack(struct task_struct *task, unsigned long *sp)
@@ -739,22 +736,5 @@ void __init trap_init(void)
pgm_check_table[0x1C] = &space_switch_exception;
pgm_check_table[0x1D] = &hfp_sqrt_exception;
pgm_check_table[0x40] = &do_monitor_call;
-
- if (MACHINE_IS_VM) {
-#ifdef CONFIG_PFAULT
- /*
- * Try to get pfault pseudo page faults going.
- */
- if (register_early_external_interrupt(0x2603, pfault_interrupt,
- &ext_int_pfault) != 0)
- panic("Couldn't request external interrupt 0x2603");
-
- if (pfault_init() == 0)
- return;
-
- /* Tough luck, no pfault. */
- unregister_early_external_interrupt(0x2603, pfault_interrupt,
- &ext_int_pfault);
-#endif
- }
+ pfault_irq_init();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-21 14:33:03 +0000