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s390/entry: remove OUTSIDE macro

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With only one OUTSIDE user left, remove the macro and move the code
directly to the machine check handler. This has the advantage that
it is much easier to determine which registers are used.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2024-02-20 15:18:56 +01:00 committed by Heiko Carstens
parent c239c83ed5
commit 29e5bc0f02
1 changed files with 4 additions and 25 deletions
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29
arch/s390/kernel/entry.S
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@ -119,29 +119,6 @@ _LPP_OFFSET = __LC_LPP
.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
clgfrl %r14,.Lrange_size\@
jhe \outside_label
.section .rodata, "a"
.balign 4
.Lrange_size\@:
.long \end - \start
.previous
.endm
.macro SIEEXIT
lg %r9,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
@ -236,7 +213,6 @@ SYM_FUNC_START(__sie64a)
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
.Lsie_done:
ni __LC_CPU_FLAGS+7,255-_CIF_SIE
# some program checks are suppressing. C code (e.g. do_protection_exception)
# will rewind the PSW by the ILC, which is often 4 bytes in case of SIE. There
@ -525,7 +501,10 @@ SYM_CODE_START(mcck_int_handler)
# and entering SIE (or leaving and clearing the flag). This
# would cause machine checks targeted at the guest to be
# handled by the host.
OUTSIDE %r9,.Lsie_entry,.Lsie_leave,4f
larl %r14,.Lsie_entry
clgrjl %r9,%r14, 4f
larl %r14,.Lsie_leave
clgrjhe %r9,%r14, 4f
oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
4: BPENTER __SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
SIEEXIT