diff options
| author | Isaku Yamahata <yamahata@valinux.co.jp> | 2009-03-04 21:05:38 +0900 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2009-03-26 10:50:22 -0700 |
| commit | 94752a794ddfdef65289a16627faefa7e2e62d58 (patch) | |
| tree | 8c1929159f03c5924af0005bcbcc7b0ba2a69754 /arch/ia64 | |
| parent | 9d1964f25c3c43dab5a5f4761477bcfc8402250e (diff) | |
ia64/pv_ops: paravirtualize mov = ar.itc.
paravirtualize mov reg = ar.itc.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/native/inst.h | 5 | ||||
| -rw-r--r-- | arch/ia64/kernel/entry.S | 4 | ||||
| -rw-r--r-- | arch/ia64/kernel/fsys.S | 4 | ||||
| -rw-r--r-- | 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 5e4e15133f4..ad59fc6a613 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 e5341e2c117..ccfdeee9d89 100644 --- a/arch/ia64/kernel/entry.S +++ b/arch/ia64/kernel/entry.S @@ -735,7 +735,7 @@ 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 @@ -984,7 +984,7 @@ 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 3544d75e7cb..3567d54f8ce 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 f675d8e3385..ec9a5fdfa1b 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 |