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-rw-r--r--arch/s390/kernel/head31.S11
-rw-r--r--arch/s390/kernel/head64.S11
-rw-r--r--arch/s390/kernel/ipl.c4
-rw-r--r--arch/s390/kernel/kprobes.c21
-rw-r--r--arch/s390/kernel/machine_kexec.c5
-rw-r--r--arch/s390/kernel/reipl.S13
-rw-r--r--arch/s390/kernel/reipl64.S13
-rw-r--r--arch/s390/kernel/smp.c15
8 files changed, 54 insertions, 39 deletions
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index da7c8bb8098..dc364c1419a 100644
--- a/arch/s390/kernel/head31.S
+++ b/arch/s390/kernel/head31.S
@@ -121,7 +121,7 @@ startup_continue:
.long .Lduct # cr2: dispatchable unit control table
.long 0 # cr3: instruction authorization
.long 0 # cr4: instruction authorization
- .long 0xffffffff # cr5: primary-aste origin
+ .long .Lduct # cr5: primary-aste origin
.long 0 # cr6: I/O interrupts
.long 0 # cr7: secondary space segment table
.long 0 # cr8: access registers translation
@@ -132,8 +132,6 @@ startup_continue:
.long 0 # cr13: home space segment table
.long 0xc0000000 # cr14: machine check handling off
.long 0 # cr15: linkage stack operations
-.Lduct: .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
.Lpcfpu:.long 0x00080000,0x80000000 + .Lchkfpu
.Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp
.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
@@ -147,6 +145,13 @@ startup_continue:
.Linittu: .long init_thread_union
.Lstartup_init:
.long startup_init
+ .align 64
+.Lduct: .long 0,0,0,0,.Lduald,0,0,0
+ .long 0,0,0,0,0,0,0,0
+ .align 128
+.Lduald:.rept 8
+ .long 0x80000000,0,0,0 # invalid access-list entries
+ .endr
.org 0x12000
.globl _ehead
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index af09e18cc5d..37010709fe6 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -134,7 +134,7 @@ startup_continue:
.quad .Lduct # cr2: dispatchable unit control table
.quad 0 # cr3: instruction authorization
.quad 0 # cr4: instruction authorization
- .quad 0xffffffffffffffff # cr5: primary-aste origin
+ .quad .Lduct # cr5: primary-aste origin
.quad 0 # cr6: I/O interrupts
.quad 0 # cr7: secondary space segment table
.quad 0 # cr8: access registers translation
@@ -145,14 +145,19 @@ startup_continue:
.quad 0 # cr13: home space segment table
.quad 0xc0000000 # cr14: machine check handling off
.quad 0 # cr15: linkage stack operations
-.Lduct: .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
.Lpcmsk:.quad 0x0000000180000000
.L4malign:.quad 0xffffffffffc00000
.Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
.Lnop: .long 0x07000700
.Lparmaddr:
.quad PARMAREA
+ .align 64
+.Lduct: .long 0,0,0,0,.Lduald,0,0,0
+ .long 0,0,0,0,0,0,0,0
+ .align 128
+.Lduald:.rept 8
+ .long 0x80000000,0,0,0 # invalid access-list entries
+ .endr
.org 0x12000
.globl _ehead
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 5a863a3bf10..d125a4ead08 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -1066,7 +1066,7 @@ static void do_reset_calls(void)
reset->fn();
}
-extern __u32 dump_prefix_page;
+u32 dump_prefix_page;
void s390_reset_system(void)
{
@@ -1078,7 +1078,7 @@ void s390_reset_system(void)
lc->panic_stack = S390_lowcore.panic_stack;
/* Save prefix page address for dump case */
- dump_prefix_page = (unsigned long) lc;
+ dump_prefix_page = (u32)(unsigned long) lc;
/* Disable prefixing */
set_prefix(0);
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index a466bab6677..8af549e9573 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -337,21 +337,14 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
}
p = get_kprobe(addr);
- if (!p) {
- if (*addr != BREAKPOINT_INSTRUCTION) {
- /*
- * The breakpoint instruction was removed right
- * after we hit it. Another cpu has removed
- * either a probepoint or a debugger breakpoint
- * at this address. In either case, no further
- * handling of this interrupt is appropriate.
- *
- */
- ret = 1;
- }
- /* Not one of ours: let kernel handle it */
+ if (!p)
+ /*
+ * No kprobe at this address. The fault has not been
+ * caused by a kprobe breakpoint. The race of breakpoint
+ * vs. kprobe remove does not exist because on s390 we
+ * use stop_machine_run to arm/disarm the breakpoints.
+ */
goto no_kprobe;
- }
kcb->kprobe_status = KPROBE_HIT_ACTIVE;
set_current_kprobe(p, regs, kcb);
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 52f57af252b..3c77dd36994 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -19,6 +19,7 @@
#include <asm/system.h>
#include <asm/smp.h>
#include <asm/reset.h>
+#include <asm/ipl.h>
typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long);
@@ -29,6 +30,10 @@ int machine_kexec_prepare(struct kimage *image)
{
void *reboot_code_buffer;
+ /* Can't replace kernel image since it is read-only. */
+ if (ipl_flags & IPL_NSS_VALID)
+ return -ENOSYS;
+
/* We don't support anything but the default image type for now. */
if (image->type != KEXEC_TYPE_DEFAULT)
return -EINVAL;
diff --git a/arch/s390/kernel/reipl.S b/arch/s390/kernel/reipl.S
index c3f4d9b9508..2f481cc3d1c 100644
--- a/arch/s390/kernel/reipl.S
+++ b/arch/s390/kernel/reipl.S
@@ -8,6 +8,10 @@
#include <asm/lowcore.h>
+#
+# do_reipl_asm
+# Parameter: r2 = schid of reipl device
+#
.globl do_reipl_asm
do_reipl_asm: basr %r13,0
.Lpg0: lpsw .Lnewpsw-.Lpg0(%r13)
@@ -16,12 +20,12 @@ do_reipl_asm: basr %r13,0
stm %r0,%r15,__LC_GPREGS_SAVE_AREA
stctl %c0,%c15,__LC_CREGS_SAVE_AREA
stam %a0,%a15,__LC_AREGS_SAVE_AREA
- mvc __LC_PREFIX_SAVE_AREA(4),dump_prefix_page-.Lpg0(%r13)
+ l %r10,.Ldump_pfx-.Lpg0(%r13)
+ mvc __LC_PREFIX_SAVE_AREA(4),0(%r10)
stckc .Lclkcmp-.Lpg0(%r13)
mvc __LC_CLOCK_COMP_SAVE_AREA(8),.Lclkcmp-.Lpg0(%r13)
stpt __LC_CPU_TIMER_SAVE_AREA
st %r13, __LC_PSW_SAVE_AREA+4
-
lctl %c6,%c6,.Lall-.Lpg0(%r13)
lr %r1,%r2
mvc __LC_PGM_NEW_PSW(8),.Lpcnew-.Lpg0(%r13)
@@ -55,6 +59,7 @@ do_reipl_asm: basr %r13,0
.align 8
.Lclkcmp: .quad 0x0000000000000000
.Lall: .long 0xff000000
+.Ldump_pfx: .long dump_prefix_page
.align 8
.Lnewpsw: .long 0x00080000,0x80000000+.Lpg1
.Lpcnew: .long 0x00080000,0x80000000+.Lecs
@@ -79,7 +84,3 @@ do_reipl_asm: basr %r13,0
.long 0x00000000,0x00000000
.long 0x00000000,0x00000000
.long 0x00000000,0x00000000
- .globl dump_prefix_page
-dump_prefix_page:
- .long 0x00000000
-
diff --git a/arch/s390/kernel/reipl64.S b/arch/s390/kernel/reipl64.S
index dbb3eed3886..c41930499a5 100644
--- a/arch/s390/kernel/reipl64.S
+++ b/arch/s390/kernel/reipl64.S
@@ -8,6 +8,12 @@
*/
#include <asm/lowcore.h>
+
+#
+# do_reipl_asm
+# Parameter: r2 = schid of reipl device
+#
+
.globl do_reipl_asm
do_reipl_asm: basr %r13,0
.Lpg0: lpswe .Lnewpsw-.Lpg0(%r13)
@@ -20,7 +26,8 @@ do_reipl_asm: basr %r13,0
stg %r0,__LC_GPREGS_SAVE_AREA-0x1000+8(%r1)
stctg %c0,%c15,__LC_CREGS_SAVE_AREA-0x1000(%r1)
stam %a0,%a15,__LC_AREGS_SAVE_AREA-0x1000(%r1)
- mvc __LC_PREFIX_SAVE_AREA-0x1000(4,%r1),dump_prefix_page-.Lpg0(%r13)
+ lg %r10,.Ldump_pfx-.Lpg0(%r13)
+ mvc __LC_PREFIX_SAVE_AREA-0x1000(4,%r1),0(%r10)
stfpc __LC_FP_CREG_SAVE_AREA-0x1000(%r1)
stckc .Lclkcmp-.Lpg0(%r13)
mvc __LC_CLOCK_COMP_SAVE_AREA-0x1000(8,%r1),.Lclkcmp-.Lpg0(%r13)
@@ -64,6 +71,7 @@ do_reipl_asm: basr %r13,0
.align 8
.Lclkcmp: .quad 0x0000000000000000
.Lall: .quad 0x00000000ff000000
+.Ldump_pfx: .quad dump_prefix_page
.Lregsave: .quad 0x0000000000000000
.align 16
/*
@@ -103,6 +111,3 @@ do_reipl_asm: basr %r13,0
.long 0x00000000,0x00000000
.long 0x00000000,0x00000000
.long 0x00000000,0x00000000
- .globl dump_prefix_page
-dump_prefix_page:
- .long 0x00000000
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index ecaa432a99f..97764f710bb 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -94,10 +94,9 @@ static void __smp_call_function_map(void (*func) (void *info), void *info,
int cpu, local = 0;
/*
- * Can deadlock when interrupts are disabled or if in wrong context,
- * caller must disable preemption
+ * Can deadlock when interrupts are disabled or if in wrong context.
*/
- WARN_ON(irqs_disabled() || in_irq() || preemptible());
+ WARN_ON(irqs_disabled() || in_irq());
/*
* Check for local function call. We have to have the same call order
@@ -152,17 +151,18 @@ out:
* Run a function on all other CPUs.
*
* You must not call this function with disabled interrupts or from a
- * hardware interrupt handler. Must be called with preemption disabled.
- * You may call it from a bottom half.
+ * hardware interrupt handler. You may call it from a bottom half.
*/
int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
int wait)
{
cpumask_t map;
+ preempt_disable();
map = cpu_online_map;
cpu_clear(smp_processor_id(), map);
__smp_call_function_map(func, info, nonatomic, wait, map);
+ preempt_enable();
return 0;
}
EXPORT_SYMBOL(smp_call_function);
@@ -178,16 +178,17 @@ EXPORT_SYMBOL(smp_call_function);
* Run a function on one processor.
*
* You must not call this function with disabled interrupts or from a
- * hardware interrupt handler. Must be called with preemption disabled.
- * You may call it from a bottom half.
+ * hardware interrupt handler. You may call it from a bottom half.
*/
int smp_call_function_on(void (*func) (void *info), void *info, int nonatomic,
int wait, int cpu)
{
cpumask_t map = CPU_MASK_NONE;
+ preempt_disable();
cpu_set(cpu, map);
__smp_call_function_map(func, info, nonatomic, wait, map);
+ preempt_enable();
return 0;
}
EXPORT_SYMBOL(smp_call_function_on);
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-29 06:48:16 +0000