On 22.08.2018 18:51, Pierre Morel wrote:
As the comment above the function suggested the shadowing
of the guest2 CRYCB can only accept a format 1 since
AP instructions are not supported in the guest.
Let's modify the check which allowed to accept a format 2 too.
As the bit is ignored without AP/APXA, it is perfectly valid to accept a
format 2, we just have to interpret it as format 1 (which is what we do)
What am I missing?
completely broken you are right
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
arch/s390/kvm/vsie.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 12b9707..56a9d47 100644
@@ -156,7 +156,9 @@ static int shadow_crycb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
scb_s->crycbd = 0;
- if (!(crycbd_o & vcpu->arch.sie_block->crycbd & CRYCB_FORMAT1))
+ if (!(crycbd_o == CRYCB_FORMAT1))
+ return 0;
huh, this looks very broken. The address is still in there.