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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-27 20:32:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-27 20:32:24 -0700 |
| commit | fe23429e6bfec817abcf316f4782aed8426ea745 (patch) | |
| tree | 097c9cb40381934d674d05927b95f15cb5d7d629 /arch | |
| parent | d3eab75a7fdd32b4b9c342a07be3525c4d31a41a (diff) | |
| parent | 0a5e2ec2647737907d267c09dc9a25fab1468865 (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fix from Martin Schwidefsky:
"A fix for a regression in regard to machine check handling in KVM.
Keeping my fingers crossed that this is the last s390 fix for v4.14"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/kvm: fix detection of guest machine checks
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/entry.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 21900e1cee9c..d185aa3965bf 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -521,12 +521,15 @@ ENTRY(pgm_check_handler) tmhh %r8,0x0001 # test problem state bit jnz 2f # -> fault in user space #if IS_ENABLED(CONFIG_KVM) - # cleanup critical section for sie64a + # cleanup critical section for program checks in sie64a lgr %r14,%r9 slg %r14,BASED(.Lsie_critical_start) clg %r14,BASED(.Lsie_critical_length) jhe 0f - brasl %r14,.Lcleanup_sie + lg %r14,__SF_EMPTY(%r15) # get control block pointer + ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE + lctlg %c1,%c1,__LC_USER_ASCE # load primary asce + larl %r9,sie_exit # skip forward to sie_exit #endif 0: tmhh %r8,0x4000 # PER bit set in old PSW ? jnz 1f # -> enabled, can't be a double fault |