Some vsie/gmap fixes and two cleanups/improvements. Patch #1 fixes an issue reported by Janosch. It was never observed so far, because KVM usually doesn't use a region 1 table for it's guest (unless memory would be exceeding something like 16 EB, which isn't even supported by the HW). Older QEMU+KVM or other hypervisors can trigger this. Patch #2 fixes a code path that probably was never taken and will most probably not be taken very often in the future - unless somebody really messes up the page tables for a guest (or writes a test for it). At some point, a test case for this would be nice. Patch #3 fixes a rare possible race. Don't think this is stable material. Gave it some testing with my limited access to somewhat-fast s390x machines. Booted a Linux kernel, supplying all possible number of page table hiearchies. v1 -> v2: - "KVM: s390: vsie: Fix region 1 ASCE sanity shadow address checks" -- Fix WARN_ON_ONCE - "gmap_table_walk() simplifications" -- Also init "table" directly David Hildenbrand (5): KVM: s390: vsie: Fix region 1 ASCE sanity shadow address checks KVM: s390: vsie: Fix delivery of addressing exceptions KVM: s390: vsie: Fix possible race when shadowing region 3 tables KVM: s390: vsie: Move conditional reschedule KVM: s390: vsie: gmap_table_walk() simplifications arch/s390/kvm/vsie.c | 4 ++-- arch/s390/mm/gmap.c | 17 +++++++++++------ 2 files changed, 13 insertions(+), 8 deletions(-) -- 2.25.1
