sparc64: Kill off old sys_perfctr system call and state.
People should be using the perf events interfaces, and
the way these system call facilities used the %pcr conflicts
with the usage of the NMI watchdog and perf events.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/perfctr.h b/arch/sparc/include/asm/perfctr.h
index 8368730..8d8720a 100644
--- a/arch/sparc/include/asm/perfctr.h
+++ b/arch/sparc/include/asm/perfctr.h
@@ -10,8 +10,8 @@
* from enumeration below. The meaning of further arguments
* are determined by the operation code.
*
- * int sys_perfctr(int opcode, unsigned long arg0,
- * unsigned long arg1, unsigned long arg2)
+ * NOTE: This system call is no longer provided, use the perf_events
+ * infrastructure.
*
* Pointers which are passed by the user are pointers to 64-bit
* integers.
diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h
index d47a98e..d24cfe1 100644
--- a/arch/sparc/include/asm/system_64.h
+++ b/arch/sparc/include/asm/system_64.h
@@ -143,15 +143,7 @@
* and 2 stores in this critical code path. -DaveM
*/
#define switch_to(prev, next, last) \
-do { if (test_thread_flag(TIF_PERFCTR)) { \
- unsigned long __tmp; \
- read_pcr(__tmp); \
- current_thread_info()->pcr_reg = __tmp; \
- read_pic(__tmp); \
- current_thread_info()->kernel_cntd0 += (unsigned int)(__tmp);\
- current_thread_info()->kernel_cntd1 += ((__tmp) >> 32); \
- } \
- flush_tlb_pending(); \
+do { flush_tlb_pending(); \
save_and_clear_fpu(); \
/* If you are tempted to conditionalize the following */ \
/* so that ASI is only written if it changes, think again. */ \
@@ -197,11 +189,6 @@
"l1", "l2", "l3", "l4", "l5", "l6", "l7", \
"i0", "i1", "i2", "i3", "i4", "i5", \
"o0", "o1", "o2", "o3", "o4", "o5", "o7"); \
- /* If you fuck with this, update ret_from_syscall code too. */ \
- if (test_thread_flag(TIF_PERFCTR)) { \
- write_pcr(current_thread_info()->pcr_reg); \
- reset_pic(); \
- } \
} while(0)
static inline unsigned long xchg32(__volatile__ unsigned int *m, unsigned int val)
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index 39be9f2..9e2d944 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -58,11 +58,6 @@
unsigned long gsr[7];
unsigned long xfsr[7];
- __u64 __user *user_cntd0;
- __u64 __user *user_cntd1;
- __u64 kernel_cntd0, kernel_cntd1;
- __u64 pcr_reg;
-
struct restart_block restart_block;
struct pt_regs *kern_una_regs;
@@ -96,15 +91,10 @@
#define TI_RWIN_SPTRS 0x000003c8
#define TI_GSR 0x00000400
#define TI_XFSR 0x00000438
-#define TI_USER_CNTD0 0x00000470
-#define TI_USER_CNTD1 0x00000478
-#define TI_KERN_CNTD0 0x00000480
-#define TI_KERN_CNTD1 0x00000488
-#define TI_PCR 0x00000490
-#define TI_RESTART_BLOCK 0x00000498
-#define TI_KUNA_REGS 0x000004c8
-#define TI_KUNA_INSN 0x000004d0
-#define TI_FPREGS 0x00000500
+#define TI_RESTART_BLOCK 0x00000470
+#define TI_KUNA_REGS 0x000004a0
+#define TI_KUNA_INSN 0x000004a8
+#define TI_FPREGS 0x000004c0
/* We embed this in the uppermost byte of thread_info->flags */
#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
@@ -199,7 +189,7 @@
*
* On trap return we need to test several values:
*
- * user: need_resched, notify_resume, sigpending, wsaved, perfctr
+ * user: need_resched, notify_resume, sigpending, wsaved
* kernel: fpdepth
*
* So to check for work in the kernel case we simply load the fpdepth
@@ -220,7 +210,7 @@
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_PERFCTR 4 /* performance counters active */
+/* flag bit 4 is available */
#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
/* flag bit 6 is available */
#define TIF_32BIT 7 /* 32-bit binary */
@@ -241,7 +231,6 @@
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
-#define _TIF_PERFCTR (1<<TIF_PERFCTR)
#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
#define _TIF_32BIT (1<<TIF_32BIT)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
@@ -252,7 +241,7 @@
#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
_TIF_DO_NOTIFY_RESUME_MASK | \
- _TIF_NEED_RESCHED | _TIF_PERFCTR)
+ _TIF_NEED_RESCHED)
#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
/*