s390/perf_event: fix address range for asynchronous stack

[deliverable/linux.git] / arch / s390 / kernel / perf_event.c

diff --git a/arch/s390/kernel/perf_event.c b/arch/s390/kernel/perf_event.c
index 61595c1f0a0fe7d502bb6c213519929effe48b02..0943b11a2f6e22c088dc13d3b8a0de9b4e6ef92c 100644 (file)
--- a/arch/s390/kernel/perf_event.c
+++ b/arch/s390/kernel/perf_event.c
@@ -74,7 +74,7 @@ static unsigned long guest_is_user_mode(struct pt_regs *regs)
 
 static unsigned long instruction_pointer_guest(struct pt_regs *regs)
 {
-       return sie_block(regs)->gpsw.addr & PSW_ADDR_INSN;
+       return sie_block(regs)->gpsw.addr;
 }
 
 unsigned long perf_instruction_pointer(struct pt_regs *regs)
@@ -231,29 +231,27 @@ static unsigned long __store_trace(struct perf_callchain_entry *entry,
        struct pt_regs *regs;
 
        while (1) {
-               sp = sp & PSW_ADDR_INSN;
                if (sp < low || sp > high - sizeof(*sf))
                        return sp;
                sf = (struct stack_frame *) sp;
-               perf_callchain_store(entry, sf->gprs[8] & PSW_ADDR_INSN);
+               perf_callchain_store(entry, sf->gprs[8]);
                /* Follow the backchain. */
                while (1) {
                        low = sp;
-                       sp = sf->back_chain & PSW_ADDR_INSN;
+                       sp = sf->back_chain;
                        if (!sp)
                                break;
                        if (sp <= low || sp > high - sizeof(*sf))
                                return sp;
                        sf = (struct stack_frame *) sp;
-                       perf_callchain_store(entry,
-                                            sf->gprs[8] & PSW_ADDR_INSN);
+                       perf_callchain_store(entry, sf->gprs[8]);
                }
                /* Zero backchain detected, check for interrupt frame. */
                sp = (unsigned long) (sf + 1);
                if (sp <= low || sp > high - sizeof(*regs))
                        return sp;
                regs = (struct pt_regs *) sp;
-               perf_callchain_store(entry, sf->gprs[8] & PSW_ADDR_INSN);
+               perf_callchain_store(entry, sf->gprs[8]);
                low = sp;
                sp = regs->gprs[15];
        }
@@ -262,12 +260,13 @@ static unsigned long __store_trace(struct perf_callchain_entry *entry,
 void perf_callchain_kernel(struct perf_callchain_entry *entry,
                           struct pt_regs *regs)
 {
-       unsigned long head;
+       unsigned long head, frame_size;
        struct stack_frame *head_sf;
 
        if (user_mode(regs))
                return;
 
+       frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
        head = regs->gprs[15];
        head_sf = (struct stack_frame *) head;
 
@@ -275,8 +274,9 @@ void perf_callchain_kernel(struct perf_callchain_entry *entry,
                return;
 
        head = head_sf->back_chain;
-       head = __store_trace(entry, head, S390_lowcore.async_stack - ASYNC_SIZE,
-                            S390_lowcore.async_stack);
+       head = __store_trace(entry, head,
+                            S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
+                            S390_lowcore.async_stack + frame_size);
 
        __store_trace(entry, head, S390_lowcore.thread_info,
                      S390_lowcore.thread_info + THREAD_SIZE);