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ia64/pv_ops: paravirtualize fsys.S. 

paravirtualize fsys.S.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata 2009-03-04 21:05:36 +09:00 committed by Tony Luck
parent 533bd15623
commit 84b8857a03
1 changed files with 7 additions and 7 deletions
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14
arch/ia64/kernel/fsys.S
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@ -419,7 +419,7 @@ EX(.fail_efault, ld8 r14=[r33]) // r14 <- *set
mov r17=(1 << (SIGKILL - 1)) | (1 << (SIGSTOP - 1))
;;
rsm psr.i // mask interrupt delivery
RSM_PSR_I(p0, r18, r19) // mask interrupt delivery
mov ar.ccv=0
andcm r14=r14,r17 // filter out SIGKILL & SIGSTOP
@ -492,7 +492,7 @@ EX(.fail_efault, ld8 r14=[r33]) // r14 <- *set
#ifdef CONFIG_SMP
st4.rel [r31]=r0 // release the lock
#endif
ssm psr.i
SSM_PSR_I(p0, p9, r31)
;;
srlz.d // ensure psr.i is set again
@ -514,7 +514,7 @@ EX(.fail_efault, (p15) st8 [r34]=r3)
#ifdef CONFIG_SMP
st4.rel [r31]=r0 // release the lock
#endif
ssm psr.i
SSM_PSR_I(p0, p9, r17)
;;
srlz.d
br.sptk.many fsys_fallback_syscall // with signal pending, do the heavy-weight syscall
@ -522,7 +522,7 @@ EX(.fail_efault, (p15) st8 [r34]=r3)
#ifdef CONFIG_SMP
.lock_contention:
/* Rather than spinning here, fall back on doing a heavy-weight syscall. */
ssm psr.i
SSM_PSR_I(p0, p9, r17)
;;
srlz.d
br.sptk.many fsys_fallback_syscall
@ -593,11 +593,11 @@ ENTRY(fsys_fallback_syscall)
adds r17=-1024,r15
movl r14=sys_call_table
;;
rsm psr.i
RSM_PSR_I(p0, r26, r27)
shladd r18=r17,3,r14
;;
ld8 r18=[r18] // load normal (heavy-weight) syscall entry-point
mov r29=psr // read psr (12 cyc load latency)
MOV_FROM_PSR(p0, r29, r26) // read psr (12 cyc load latency)
mov r27=ar.rsc
mov r21=ar.fpsr
mov r26=ar.pfs
@ -735,7 +735,7 @@ GLOBAL_ENTRY(paravirt_fsys_bubble_down)
mov rp=r14 // I0 set the real return addr
and r3=_TIF_SYSCALL_TRACEAUDIT,r3 // A
;;
ssm psr.i // M2 we're on kernel stacks now, reenable irqs
SSM_PSR_I(p0, p6, r22) // M2 we're on kernel stacks now, reenable irqs
cmp.eq p8,p0=r3,r0 // A
(p10) br.cond.spnt.many ia64_ret_from_syscall // B return if bad call-frame or r15 is a NaT