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s390/entry.S: factor out SIEEXIT macro

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Factor out SIEEXIT macro and use it instead of cleanup_sie
routine. As a side effect %r13 and %r14 are spared.

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Christia Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2021-06-18 08:17:13 +02:00 committed by Vasily Gorbik
parent 07f3a35df1
commit fbbdfca5c5
1 changed files with 12 additions and 16 deletions
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28
arch/s390/kernel/entry.S
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@ -148,6 +148,13 @@ _LPP_OFFSET = __LC_LPP
clgr %r14,%r13
jhe \outside_label
.endm
.macro SIEEXIT
lg %r9,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_KERNEL_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
.endm
#endif
GEN_BR_THUNK %r14
@ -235,7 +242,6 @@ ENTRY(sie64a)
# are some corner cases (e.g. runtime instrumentation) where ILC is unpredictable.
# Other instructions between sie64a and .Lsie_done should not cause program
# interrupts. So lets use 3 nops as a landing pad for all possible rewinds.
# See also .Lcleanup_sie
.Lrewind_pad6:
nopr 7
.Lrewind_pad4:
@ -341,10 +347,7 @@ ENTRY(pgm_check_handler)
#if IS_ENABLED(CONFIG_KVM)
# cleanup critical section for program checks in sie64a
OUTSIDE %r9,.Lsie_gmap,.Lsie_done,1f
lg %r14,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_KERNEL_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
SIEEXIT
lghi %r10,_PIF_GUEST_FAULT
#endif
1: tmhh %r8,0x4000 # PER bit set in old PSW ?
@ -410,7 +413,8 @@ ENTRY(\name)
jnz 1f
#if IS_ENABLED(CONFIG_KVM)
OUTSIDE %r9,.Lsie_gmap,.Lsie_done,0f
brasl %r14,.Lcleanup_sie
BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
SIEEXIT
#endif
0: CHECK_STACK __LC_SAVE_AREA_ASYNC
aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
@ -556,7 +560,8 @@ ENTRY(mcck_int_handler)
OUTSIDE %r9,.Lsie_gmap,.Lsie_done,.Lmcck_stack
OUTSIDE %r9,.Lsie_entry,.Lsie_skip,5f
oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
5: brasl %r14,.Lcleanup_sie
5: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
SIEEXIT
#endif
j .Lmcck_stack
.Lmcck_user:
@ -657,15 +662,6 @@ ENTRY(stack_overflow)
ENDPROC(stack_overflow)
#endif
#if IS_ENABLED(CONFIG_KVM)
.Lcleanup_sie:
BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
lg %r9,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_KERNEL_ASCE
larl %r9,sie_exit # skip forward to sie_exit
BR_EX %r14,%r13
#endif
.section .rodata, "a"
#define SYSCALL(esame,emu) .quad __s390x_ ## esame
.globl sys_call_table