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| author |   Sven Schnelle <svens@linux.ibm.com> | 2021-02-03 17:50:00 +0100 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2021-02-13 17:17:53 +0100 |
| commit | efa54735905c03bf876b4451cfaef6b45046bc53 (patch) | |
| tree | 7c5303f59406685181f66f2c74c313dde60a72be | |
| parent | s390: use r13 in cleanup_sie as temp register (diff) | |
| download | wireguard-linux-efa54735905c03bf876b4451cfaef6b45046bc53.tar.xz wireguard-linux-efa54735905c03bf876b4451cfaef6b45046bc53.zip | |
s390: split cleanup_sie
The current code uses the address in %r11 to figure out whether
it was called from the machine check handler or from a normal
interrupt handler. Instead of doing this implicit logic (which
is mostly a leftover from the old critical cleanup approach)
just add a second label and use that.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
| -rw-r--r-- | arch/s390/kernel/entry.S | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index d1236a9f73b2..c10b9f31eef7 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -214,7 +214,7 @@ 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 +# See also .Lcleanup_sie_mcck/.Lcleanup_sie_int .Lrewind_pad6: nopr 7 .Lrewind_pad4: @@ -398,8 +398,7 @@ ENTRY(\name) lghi %r13,.Lsie_done - .Lsie_gmap clgr %r14,%r13 jhe 0f - lghi %r11,__LC_SAVE_AREA_ASYNC # inside critical section, do cleanup - brasl %r14,.Lcleanup_sie + brasl %r14,.Lcleanup_sie_int #endif 0: CHECK_STACK __LC_SAVE_AREA_ASYNC lgr %r11,%r15 @@ -548,8 +547,7 @@ ENTRY(mcck_int_handler) lghi %r13,.Lsie_done - .Lsie_gmap clgr %r14,%r13 jhe .Lmcck_stack - lghi %r11,__LC_GPREGS_SAVE_AREA+64 # inside critical section, do cleanup - brasl %r14,.Lcleanup_sie + brasl %r14,.Lcleanup_sie_mcck #endif j .Lmcck_stack .Lmcck_user: @@ -651,16 +649,15 @@ ENDPROC(stack_overflow) #endif #if IS_ENABLED(CONFIG_KVM) -.Lcleanup_sie: - cghi %r11,__LC_SAVE_AREA_ASYNC #Is this in normal interrupt? - je 1f +.Lcleanup_sie_mcck: larl %r13,.Lsie_entry slgr %r9,%r13 larl %r13,.Lsie_skip clgr %r9,%r13 - jh 1f + jh .Lcleanup_sie_int oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST -1: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST) +.Lcleanup_sie_int: + 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 |