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| author |   Alexander Gordeev <agordeev@linux.ibm.com> | 2021-06-18 08:17:13 +0200 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2021-07-05 12:44:23 +0200 |
| commit | fbbdfca5c5535f52ba47e46eacac899dfad7f384 (patch) | |
| tree | f7b2979eff7fef2a5776109054482e7edd731671 /arch/s390/kernel/entry.S | |
| parent | s390/lib,uaccess: fix copy_in_user_mvcos() inline asm clobber list (diff) | |
| download | linux-dev-fbbdfca5c5535f52ba47e46eacac899dfad7f384.tar.xz linux-dev-fbbdfca5c5535f52ba47e46eacac899dfad7f384.zip | |
s390/entry.S: factor out SIEEXIT macro
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>
Diffstat (limited to 'arch/s390/kernel/entry.S')
| -rw-r--r-- | arch/s390/kernel/entry.S | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 3e8c6669373a..3287cb0d89ad 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -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 |