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| author | Radim Krčmář <rkrcmar@redhat.com> | 2017-06-22 17:13:06 +0300 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-06-22 17:13:06 +0300 |
| commit | d6aa07c16941dcf438bd526a56dcf227991c5907 (patch) | |
| tree | 8a1f69436d3fa9355459fd79661d9a177001a39e /arch/s390 | |
| parent | e27a9eca5d4a392b96ce5d5238c8d637bcb0a52c (diff) | |
| parent | addb63c18a0d52a9ce2611d039f981f7b6148d2b (diff) | |
| download | linux-d6aa07c16941dcf438bd526a56dcf227991c5907.tar.xz | |
Merge tag 'kvm-s390-master-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux
KVM: s390: fix shadow table handling for nested guests
Some odd-ball cases (real-space designation ASCEs) are handled wrong
for the shadow page tables. Fix it.
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kvm/gaccess.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c index 9da243d94cc3..3b297fa3aa67 100644 --- a/arch/s390/kvm/gaccess.c +++ b/arch/s390/kvm/gaccess.c @@ -977,11 +977,12 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr, ptr = asce.origin * 4096; if (asce.r) { *fake = 1; + ptr = 0; asce.dt = ASCE_TYPE_REGION1; } switch (asce.dt) { case ASCE_TYPE_REGION1: - if (vaddr.rfx01 > asce.tl && !asce.r) + if (vaddr.rfx01 > asce.tl && !*fake) return PGM_REGION_FIRST_TRANS; break; case ASCE_TYPE_REGION2: @@ -1009,8 +1010,7 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr, union region1_table_entry rfte; if (*fake) { - /* offset in 16EB guest memory block */ - ptr = ptr + ((unsigned long) vaddr.rsx << 53UL); + ptr += (unsigned long) vaddr.rfx << 53; rfte.val = ptr; goto shadow_r2t; } @@ -1036,8 +1036,7 @@ shadow_r2t: union region2_table_entry rste; if (*fake) { - /* offset in 8PB guest memory block */ - ptr = ptr + ((unsigned long) vaddr.rtx << 42UL); + ptr += (unsigned long) vaddr.rsx << 42; rste.val = ptr; goto shadow_r3t; } @@ -1064,8 +1063,7 @@ shadow_r3t: union region3_table_entry rtte; if (*fake) { - /* offset in 4TB guest memory block */ - ptr = ptr + ((unsigned long) vaddr.sx << 31UL); + ptr += (unsigned long) vaddr.rtx << 31; rtte.val = ptr; goto shadow_sgt; } @@ -1101,8 +1099,7 @@ shadow_sgt: union segment_table_entry ste; if (*fake) { - /* offset in 2G guest memory block */ - ptr = ptr + ((unsigned long) vaddr.sx << 20UL); + ptr += (unsigned long) vaddr.sx << 20; ste.val = ptr; goto shadow_pgt; } |