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[S390] zfcpdump: remove cross arch dump support

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Remove support to be able to dump 31 bit systems with a 64 bit dumper.
This is mostly useless since no distro ships 31 bit kernels together
with a 64 bit dumper.
We also get rid of a bit of hacky code.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2010-02-26 22:37:32 +01:00 committed by Martin Schwidefsky
parent 987bcdacb1
commit f64ca21714
6 changed files with 72 additions and 205 deletions
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26
arch/s390/include/asm/lowcore.h
View File

@ -144,7 +144,9 @@ void pgm_check_handler(void);
void mcck_int_handler(void);
void io_int_handler(void);
struct save_area_s390 {
#ifdef CONFIG_32BIT
struct save_area {
u32 ext_save;
u64 timer;
u64 clk_cmp;
@ -158,7 +160,11 @@ struct save_area_s390 {
u32 ctrl_regs[16];
} __attribute__((packed));
struct save_area_s390x {
#define SAVE_AREA_BASE offsetof(struct _lowcore, extended_save_area_addr)
#else /* CONFIG_32BIT */
struct save_area {
u64 fp_regs[16];
u64 gp_regs[16];
u8 psw[16];
@ -174,21 +180,9 @@ struct save_area_s390x {
u64 ctrl_regs[16];
} __attribute__((packed));
union save_area {
struct save_area_s390 s390;
struct save_area_s390x s390x;
};
#define SAVE_AREA_BASE offsetof(struct _lowcore, floating_pt_save_area)
#define SAVE_AREA_BASE_S390 0xd4
#define SAVE_AREA_BASE_S390X 0x1200
#ifndef __s390x__
#define SAVE_AREA_SIZE sizeof(struct save_area_s390)
#define SAVE_AREA_BASE SAVE_AREA_BASE_S390
#else
#define SAVE_AREA_SIZE sizeof(struct save_area_s390x)
#define SAVE_AREA_BASE SAVE_AREA_BASE_S390X
#endif
#endif /* CONFIG_32BIT */
#ifndef __s390x__
#define LC_ORDER 0

2
arch/s390/include/asm/smp.h
View File

@ -29,7 +29,7 @@ extern int smp_cpu_polarization[];
extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1];
#endif /* CONFIG_SMP */

70
arch/s390/kernel/head64.S
View File

@ -16,71 +16,9 @@ startup_continue:
basr %r13,0 # get base
.LPG1: sll %r13,1 # remove high order bit
srl %r13,1
#ifdef CONFIG_ZFCPDUMP
# check if we have been ipled using zfcp dump:
tm 0xb9,0x01 # test if subchannel is enabled
jno .nodump # subchannel disabled
l %r1,0xb8
la %r5,.Lipl_schib-.LPG1(%r13)
stsch 0(%r5) # get schib of subchannel
jne .nodump # schib not available
tm 5(%r5),0x01 # devno valid?
jno .nodump
tm 4(%r5),0x80 # qdio capable device?
jno .nodump
l %r2,20(%r0) # address of ipl parameter block
lhi %r3,0
ic %r3,0x148(%r2) # get opt field
chi %r3,0x20 # load with dump?
jne .nodump
# store all prefix registers in case of load with dump:
la %r7,0 # base register for 0 page
la %r8,0 # first cpu
l %r11,.Lpref_arr_ptr-.LPG1(%r13) # address of prefix array
ahi %r11,4 # skip boot cpu
lr %r12,%r11
ahi %r12,(CONFIG_NR_CPUS*4) # end of prefix array
stap .Lcurrent_cpu+2-.LPG1(%r13) # store current cpu addr
1:
cl %r8,.Lcurrent_cpu-.LPG1(%r13) # is ipl cpu ?
je 4f # if yes get next cpu
2:
lr %r9,%r7
sigp %r9,%r8,0x9 # stop & store status of cpu
brc 8,3f # accepted
brc 4,4f # status stored: next cpu
brc 2,2b # busy: try again
brc 1,4f # not op: next cpu
3:
mvc 0(4,%r11),264(%r7) # copy prefix register to prefix array
ahi %r11,4 # next element in prefix array
clr %r11,%r12
je 5f # no more space in prefix array
4:
ahi %r8,1 # next cpu (r8 += 1)
chi %r8,MAX_CPU_ADDRESS # is last possible cpu ?
jle 1b # jump if not last cpu
5:
lhi %r1,2 # mode 2 = esame (dump)
j 6f
.align 4
.Lipl_schib:
.rept 13
.long 0
.endr
.nodump:
lhi %r1,1 # mode 1 = esame (normal ipl)
6:
#else
lhi %r1,1 # mode 1 = esame (normal ipl)
#endif /* CONFIG_ZFCPDUMP */
mvi __LC_AR_MODE_ID,1 # set esame flag
slr %r0,%r0 # set cpuid to zero
lhi %r1,2 # mode 2 = esame (dump)
sigp %r1,%r0,0x12 # switch to esame mode
sam64 # switch to 64 bit mode
llgfr %r13,%r13 # clear high-order half of base reg
@ -130,12 +68,6 @@ startup_continue:
.Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
.Lnop: .long 0x07000700
.Lzero64:.fill 16,4,0x0
#ifdef CONFIG_ZFCPDUMP
.Lcurrent_cpu:
.long 0x0
.Lpref_arr_ptr:
.long zfcpdump_prefix_array
#endif /* CONFIG_ZFCPDUMP */
.Lparmaddr:
.quad PARMAREA
.align 64

19
arch/s390/kernel/smp.c
View File

@ -248,15 +248,6 @@ EXPORT_SYMBOL(smp_ctl_clear_bit);
#ifdef CONFIG_ZFCPDUMP
/*
* zfcpdump_prefix_array holds prefix registers for the following scenario:
* 64 bit zfcpdump kernel and 31 bit kernel which is to be dumped. We have to
* save its prefix registers, since they get lost, when switching from 31 bit
* to 64 bit.
*/
unsigned int zfcpdump_prefix_array[NR_CPUS + 1] \
__attribute__((__section__(".data")));
static void __init smp_get_save_area(unsigned int cpu, unsigned int phy_cpu)
{
if (ipl_info.type != IPL_TYPE_FCP_DUMP)
@ -266,21 +257,17 @@ static void __init smp_get_save_area(unsigned int cpu, unsigned int phy_cpu)
"the dump\n", cpu, NR_CPUS - 1);
return;
}
zfcpdump_save_areas[cpu] = kmalloc(sizeof(union save_area), GFP_KERNEL);
zfcpdump_save_areas[cpu] = kmalloc(sizeof(struct save_area), GFP_KERNEL);
__cpu_logical_map[CPU_INIT_NO] = (__u16) phy_cpu;
while (signal_processor(CPU_INIT_NO, sigp_stop_and_store_status) ==
sigp_busy)
cpu_relax();
memcpy(zfcpdump_save_areas[cpu],
(void *)(unsigned long) store_prefix() + SAVE_AREA_BASE,
SAVE_AREA_SIZE);
#ifdef CONFIG_64BIT
/* copy original prefix register */
zfcpdump_save_areas[cpu]->s390x.pref_reg = zfcpdump_prefix_array[cpu];
#endif
sizeof(struct save_area));
}
union save_area *zfcpdump_save_areas[NR_CPUS + 1];
struct save_area *zfcpdump_save_areas[NR_CPUS + 1];
EXPORT_SYMBOL_GPL(zfcpdump_save_areas);
#else

20
arch/s390/kvm/kvm-s390.c
View File

@ -603,45 +603,45 @@ int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
} else
prefix = 0;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs),
vcpu->arch.guest_fpregs.fprs, 128, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs),
vcpu->arch.guest_gprs, 128, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw),
&vcpu->arch.sie_block->gpsw, 16, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg),
&vcpu->arch.sie_block->prefix, 4, prefix))
return -EFAULT;
if (__guestcopy(vcpu,
addr + offsetof(struct save_area_s390x, fp_ctrl_reg),
addr + offsetof(struct save_area, fp_ctrl_reg),
&vcpu->arch.guest_fpregs.fpc, 4, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg),
&vcpu->arch.sie_block->todpr, 4, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer),
&vcpu->arch.sie_block->cputm, 8, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp),
&vcpu->arch.sie_block->ckc, 8, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs),
if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs),
&vcpu->arch.guest_acrs, 64, prefix))
return -EFAULT;
if (__guestcopy(vcpu,
addr + offsetof(struct save_area_s390x, ctrl_regs),
addr + offsetof(struct save_area, ctrl_regs),
&vcpu->arch.sie_block->gcr, 128, prefix))
return -EFAULT;
return 0;

140
drivers/s390/char/zcore.c
View File

@ -40,12 +40,12 @@ enum arch_id {
/* dump system info */
struct sys_info {
enum arch_id arch;
unsigned long sa_base;
u32 sa_size;
int cpu_map[NR_CPUS];
unsigned long mem_size;
union save_area lc_mask;
enum arch_id arch;
unsigned long sa_base;
u32 sa_size;
int cpu_map[NR_CPUS];
unsigned long mem_size;
struct save_area lc_mask;
};
struct ipib_info {
@ -183,52 +183,9 @@ static int memcpy_real_user(void __user *dest, unsigned long src, size_t count)
return 0;
}
#ifdef __s390x__
/*
* Convert s390x (64 bit) cpu info to s390 (32 bit) cpu info
*/
static void __init s390x_to_s390_regs(union save_area *out, union save_area *in,
int cpu)
{
int i;
for (i = 0; i < 16; i++) {
out->s390.gp_regs[i] = in->s390x.gp_regs[i] & 0x00000000ffffffff;
out->s390.acc_regs[i] = in->s390x.acc_regs[i];
out->s390.ctrl_regs[i] =
in->s390x.ctrl_regs[i] & 0x00000000ffffffff;
}
/* locore for 31 bit has only space for fpregs 0,2,4,6 */
out->s390.fp_regs[0] = in->s390x.fp_regs[0];
out->s390.fp_regs[1] = in->s390x.fp_regs[2];
out->s390.fp_regs[2] = in->s390x.fp_regs[4];
out->s390.fp_regs[3] = in->s390x.fp_regs[6];
memcpy(&(out->s390.psw[0]), &(in->s390x.psw[0]), 4);
out->s390.psw[1] |= 0x8; /* set bit 12 */
memcpy(&(out->s390.psw[4]),&(in->s390x.psw[12]), 4);
out->s390.psw[4] |= 0x80; /* set (31bit) addressing bit */
out->s390.pref_reg = in->s390x.pref_reg;
out->s390.timer = in->s390x.timer;
out->s390.clk_cmp = in->s390x.clk_cmp;
}
static void __init s390x_to_s390_save_areas(void)
{
int i = 1;
static union save_area tmp;
while (zfcpdump_save_areas[i]) {
s390x_to_s390_regs(&tmp, zfcpdump_save_areas[i], i);
memcpy(zfcpdump_save_areas[i], &tmp, sizeof(tmp));
i++;
}
}
#endif /* __s390x__ */
static int __init init_cpu_info(enum arch_id arch)
{
union save_area *sa;
struct save_area *sa;
/* get info for boot cpu from lowcore, stored in the HSA */
@ -241,14 +198,6 @@ static int __init init_cpu_info(enum arch_id arch)
return -EIO;
}
zfcpdump_save_areas[0] = sa;
#ifdef __s390x__
/* convert s390x regs to s390, if we are dumping an s390 Linux */
if (arch == ARCH_S390)
s390x_to_s390_save_areas();
#endif
return 0;
}
@ -289,7 +238,7 @@ static struct zcore_header zcore_header = {
.dump_level = 0,
.page_size = PAGE_SIZE,
.mem_start = 0,
#ifdef __s390x__
#ifdef CONFIG_64BIT
.build_arch = DUMP_ARCH_S390X,
#else
.build_arch = DUMP_ARCH_S390,
@ -340,11 +289,7 @@ static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
unsigned long prefix;
unsigned long sa_off, len, buf_off;
if (sys_info.arch == ARCH_S390)
prefix = zfcpdump_save_areas[i]->s390.pref_reg;
else
prefix = zfcpdump_save_areas[i]->s390x.pref_reg;
prefix = zfcpdump_save_areas[i]->pref_reg;
sa_start = prefix + sys_info.sa_base;
sa_end = prefix + sys_info.sa_base + sys_info.sa_size;
@ -561,34 +506,39 @@ static const struct file_operations zcore_reipl_fops = {
.release = zcore_reipl_release,
};
#ifdef CONFIG_32BIT
static void __init set_s390_lc_mask(union save_area *map)
static void __init set_lc_mask(struct save_area *map)
{
memset(&map->s390.ext_save, 0xff, sizeof(map->s390.ext_save));
memset(&map->s390.timer, 0xff, sizeof(map->s390.timer));
memset(&map->s390.clk_cmp, 0xff, sizeof(map->s390.clk_cmp));
memset(&map->s390.psw, 0xff, sizeof(map->s390.psw));
memset(&map->s390.pref_reg, 0xff, sizeof(map->s390.pref_reg));
memset(&map->s390.acc_regs, 0xff, sizeof(map->s390.acc_regs));
memset(&map->s390.fp_regs, 0xff, sizeof(map->s390.fp_regs));
memset(&map->s390.gp_regs, 0xff, sizeof(map->s390.gp_regs));
memset(&map->s390.ctrl_regs, 0xff, sizeof(map->s390.ctrl_regs));
memset(&map->ext_save, 0xff, sizeof(map->ext_save));
memset(&map->timer, 0xff, sizeof(map->timer));
memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
memset(&map->psw, 0xff, sizeof(map->psw));
memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
}
static void __init set_s390x_lc_mask(union save_area *map)
#else /* CONFIG_32BIT */
static void __init set_lc_mask(struct save_area *map)
{
memset(&map->s390x.fp_regs, 0xff, sizeof(map->s390x.fp_regs));
memset(&map->s390x.gp_regs, 0xff, sizeof(map->s390x.gp_regs));
memset(&map->s390x.psw, 0xff, sizeof(map->s390x.psw));
memset(&map->s390x.pref_reg, 0xff, sizeof(map->s390x.pref_reg));
memset(&map->s390x.fp_ctrl_reg, 0xff, sizeof(map->s390x.fp_ctrl_reg));
memset(&map->s390x.tod_reg, 0xff, sizeof(map->s390x.tod_reg));
memset(&map->s390x.timer, 0xff, sizeof(map->s390x.timer));
memset(&map->s390x.clk_cmp, 0xff, sizeof(map->s390x.clk_cmp));
memset(&map->s390x.acc_regs, 0xff, sizeof(map->s390x.acc_regs));
memset(&map->s390x.ctrl_regs, 0xff, sizeof(map->s390x.ctrl_regs));
memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
memset(&map->psw, 0xff, sizeof(map->psw));
memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg));
memset(&map->tod_reg, 0xff, sizeof(map->tod_reg));
memset(&map->timer, 0xff, sizeof(map->timer));
memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
}
#endif /* CONFIG_32BIT */
/*
* Initialize dump globals for a given architecture
*/
@ -599,21 +549,18 @@ static int __init sys_info_init(enum arch_id arch)
switch (arch) {
case ARCH_S390X:
pr_alert("DETECTED 'S390X (64 bit) OS'\n");
sys_info.sa_base = SAVE_AREA_BASE_S390X;
sys_info.sa_size = sizeof(struct save_area_s390x);
set_s390x_lc_mask(&sys_info.lc_mask);
break;
case ARCH_S390:
pr_alert("DETECTED 'S390 (32 bit) OS'\n");
sys_info.sa_base = SAVE_AREA_BASE_S390;
sys_info.sa_size = sizeof(struct save_area_s390);
set_s390_lc_mask(&sys_info.lc_mask);
break;
default:
pr_alert("0x%x is an unknown architecture.\n",arch);
return -EINVAL;
}
sys_info.sa_base = SAVE_AREA_BASE;
sys_info.sa_size = sizeof(struct save_area);
sys_info.arch = arch;
set_lc_mask(&sys_info.lc_mask);
rc = init_cpu_info(arch);
if (rc)
return rc;
@ -741,14 +688,21 @@ static int __init zcore_init(void)
if (rc)
goto fail;
#ifndef __s390x__
#ifdef CONFIG_64BIT
if (arch == ARCH_S390) {
pr_alert("The 64-bit dump tool cannot be used for a "
"32-bit system\n");
rc = -EINVAL;
goto fail;
}
#else /* CONFIG_64BIT */
if (arch == ARCH_S390X) {
pr_alert("The 32-bit dump tool cannot be used for a "
"64-bit system\n");
rc = -EINVAL;
goto fail;
}
#endif
#endif /* CONFIG_64BIT */
rc = sys_info_init(arch);
if (rc)