diff options
| author | Radim Krčmář <rkrcmar@redhat.com> | 2017-04-04 14:42:51 +0200 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-04-04 14:42:51 +0200 |
| commit | 34fcf05b1557f1f8d6801d9dde30ac1d13213ba3 (patch) | |
| tree | 4750c3cfb767393da19adffdbbcc7212e694cb7d /arch | |
| parent | a71c9a1c779f2499fb2afc0553e543f18aff6edf (diff) | |
| parent | 232b8e3b1d4946a45e3b9dd4c282b12a085dd39d (diff) | |
Merge tag 'kvm-s390-master-4.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux
From: Christian Borntraeger <borntraeger@de.ibm.com>
KVM: s390: Fix instruction-execution-protection/change-recording override
This is a fix that prevents translation exception errors
on valid page tables for the instruction-exection-protection
support. This feature was added during the 4.11 merge window.
We have to remove an old check that would trigger if the
change-recording override is not available (e.g. edat1 disabled
via cpu model).
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kvm/gaccess.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c index d55c829a5944..ddbffb715b40 100644 --- a/arch/s390/kvm/gaccess.c +++ b/arch/s390/kvm/gaccess.c @@ -168,8 +168,7 @@ union page_table_entry { unsigned long z : 1; /* Zero Bit */ unsigned long i : 1; /* Page-Invalid Bit */ unsigned long p : 1; /* DAT-Protection Bit */ - unsigned long co : 1; /* Change-Recording Override */ - unsigned long : 8; + unsigned long : 9; }; }; @@ -745,8 +744,6 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva, return PGM_PAGE_TRANSLATION; if (pte.z) return PGM_TRANSLATION_SPEC; - if (pte.co && !edat1) - return PGM_TRANSLATION_SPEC; dat_protection |= pte.p; raddr.pfra = pte.pfra; real_address: @@ -1182,7 +1179,7 @@ int kvm_s390_shadow_fault(struct kvm_vcpu *vcpu, struct gmap *sg, rc = gmap_read_table(sg->parent, pgt + vaddr.px * 8, &pte.val); if (!rc && pte.i) rc = PGM_PAGE_TRANSLATION; - if (!rc && (pte.z || (pte.co && sg->edat_level < 1))) + if (!rc && pte.z) rc = PGM_TRANSLATION_SPEC; shadow_page: pte.p |= dat_protection; |