diff options
| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2021-06-07 12:01:49 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-06-16 23:46:18 +0200 |
| commit | b5415c8f9755069640aad184293198bcf794f66d (patch) | |
| tree | 5a805859a2790e29489c85c9ce590980bcdd625e /arch/s390/kernel/entry.S | |
| parent | df6f508c68dbc65def0098cbdf8de7683ae551d2 (diff) | |
s390/entry.S: factor out OUTSIDE macro
Introduce OUTSIDE macro that checks whether an instruction
address is inside or outside of a block of instructions.
Signed-off-by: Alexander Gordeev <agordeev@linux.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 | 48 |
1 files changed, 25 insertions, 23 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 7cfa08b67cae..187f704cc9e9 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -129,6 +129,27 @@ _LPP_OFFSET = __LC_LPP "jnz .+8; .long 0xb2e8d000", 82 .endm +#if IS_ENABLED(CONFIG_KVM) + /* + * The OUTSIDE macro jumps to the provided label in case the value + * in the provided register is outside of the provided range. The + * macro is useful for checking whether a PSW stored in a register + * pair points inside or outside of a block of instructions. + * @reg: register to check + * @start: start of the range + * @end: end of the range + * @outside_label: jump here if @reg is outside of [@start..@end) + */ + .macro OUTSIDE reg,start,end,outside_label + lgr %r14,\reg + larl %r13,\start + slgr %r14,%r13 + lghi %r13,\end - \start + clgr %r14,%r13 + jhe \outside_label + .endm +#endif + GEN_BR_THUNK %r14 GEN_BR_THUNK %r14,%r13 @@ -319,12 +340,7 @@ ENTRY(pgm_check_handler) .Lpgm_skip_asce: #if IS_ENABLED(CONFIG_KVM) # cleanup critical section for program checks in sie64a - lgr %r14,%r9 - larl %r13,.Lsie_gmap - slgr %r14,%r13 - lghi %r13,.Lsie_done - .Lsie_gmap - clgr %r14,%r13 - jhe 1f + 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 @@ -393,12 +409,7 @@ ENTRY(\name) tmhh %r8,0x0001 # interrupting from user ? jnz 1f #if IS_ENABLED(CONFIG_KVM) - lgr %r14,%r9 - larl %r13,.Lsie_gmap - slgr %r14,%r13 - lghi %r13,.Lsie_done - .Lsie_gmap - clgr %r14,%r13 - jhe 0f + OUTSIDE %r9,.Lsie_gmap,.Lsie_done,0f brasl %r14,.Lcleanup_sie #endif 0: CHECK_STACK __LC_SAVE_AREA_ASYNC @@ -541,17 +552,8 @@ ENTRY(mcck_int_handler) tmhh %r8,0x0001 # interrupting from user ? jnz .Lmcck_user #if IS_ENABLED(CONFIG_KVM) - lgr %r14,%r9 - larl %r13,.Lsie_gmap - slgr %r14,%r13 - lghi %r13,.Lsie_done - .Lsie_gmap - clgr %r14,%r13 - jhe .Lmcck_stack - larl %r13,.Lsie_entry - slgr %r9,%r13 - lghi %r13,.Lsie_skip - .Lsie_entry - clgr %r9,%r13 - jhe 5f + 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 #endif |