paravirtualize mov reg = ar.itc.
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
arch/ia64/include/asm/native/inst.h | 5 +++++
arch/ia64/kernel/entry.S | 4 ++--
arch/ia64/kernel/fsys.S | 4 ++--
arch/ia64/kernel/ivt.S | 2 +-
4 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/arch/ia64/include/asm/native/inst.h
b/arch/ia64/include/asm/native/inst.h
index 5e4e151..ad59fc6 100644
--- a/arch/ia64/include/asm/native/inst.h
+++ b/arch/ia64/include/asm/native/inst.h
@@ -77,6 +77,11 @@
(pred) mov reg = psr \
CLOBBER(clob)
+#define MOV_FROM_ITC(pred, pred_clob, reg, clob) \
+(pred) mov reg = ar.itc \
+ CLOBBER(clob) \
+ CLOBBER_PRED(pred_clob)
+
#define MOV_TO_IFA(reg, clob) \
mov cr.ifa = reg \
CLOBBER(clob)
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 7ef0c59..d8462bd 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -734,7 +734,7 @@ GLOBAL_ENTRY(__paravirt_leave_syscall)
__paravirt_work_processed_syscall:
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
adds r2=PT(LOADRS)+16,r12
-(pUStk) mov.m r22=ar.itc // fetch time at leave
+ MOV_FROM_ITC(pUStk, p9, r22, r19) // fetch time at leave
adds r18=TI_FLAGS+IA64_TASK_SIZE,r13
;;
(p6) ld4 r31=[r18] // load
current_thread_info()->flags
@@ -983,7 +983,7 @@ GLOBAL_ENTRY(__paravirt_leave_kernel)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.pred.rel.mutex pUStk,pKStk
MOV_FROM_PSR(pKStk, r22, r29) // M2 read PSR now that interrupts are
disabled
-(pUStk) mov.m r22=ar.itc // M fetch time at leave
+ MOV_FROM_ITC(pUStk, p9, r22, r29) // M fetch time at leave
nop.i 0
;;
#else
diff --git a/arch/ia64/kernel/fsys.S b/arch/ia64/kernel/fsys.S
index 3544d75..3567d54 100644
--- a/arch/ia64/kernel/fsys.S
+++ b/arch/ia64/kernel/fsys.S
@@ -280,7 +280,7 @@ ENTRY(fsys_gettimeofday)
(p9) cmp.eq p13,p0 = 0,r30 // if mmio_ptr, clear p13 jitter control
;;
.pred.rel.mutex p8,p9
-(p8) mov r2 = ar.itc // CPU_TIMER. 36 clocks latency!!!
+ MOV_FROM_ITC(p8, p6, r2, r10) // CPU_TIMER. 36 clocks latency!!!
(p9) ld8 r2 = [r30] // MMIO_TIMER. Could also have latency issues..
(p13) ld8 r25 = [r19] // get itc_lastcycle value
ld8 r9 = [r22],IA64_TIMESPEC_TV_NSEC_OFFSET // tv_sec
@@ -684,7 +684,7 @@ GLOBAL_ENTRY(paravirt_fsys_bubble_down)
;;
mov ar.rsc=0 // M2 set enforced lazy mode,
pl 0, LE, loadrs=0
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- mov.m r30=ar.itc // M get cycle for accounting
+ MOV_FROM_ITC(p0, p6, r30, r23) // M get cycle for accounting
#else
nop.m 0
#endif
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index f675d8e..ec9a5fd 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -804,7 +804,7 @@ ENTRY(break_fault)
///////////////////////////////////////////////////////////////////////
st1 [r16]=r0 // M2|3 clear
current->thread.on_ustack flag
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- mov.m r30=ar.itc // M get cycle for accounting
+ MOV_FROM_ITC(p0, p14, r30, r18) // M get cycle for accounting
#else
mov b6=r30 // I0 setup syscall handler
branch reg early
#endif
--
1.6.0.2
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