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KVM: s390: fix stale machine check data for guarded storage 

When delivering a machine check the CPU state is "loaded", which
means that some registers are already in the host registers.
Before writing the register content into the machine check
save area, we must make sure that we save the content of the
registers into the data structures that are used for delivering
the machine check.
We already do the right thing for access, vector/floating point
registers, let's do the same for guarded storage.

Fixes: 4e0b1ab72b ("KVM: s390: gs support for kvm guests")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2017-04-12 12:59:59 +02:00
parent fe722d13e3
commit 8024855999
1 changed files with 2 additions and 0 deletions
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arch/s390/kvm/interrupt.c
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@ -419,6 +419,8 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
/* take care of lazy register loading */
save_fpu_regs();
save_access_regs(vcpu->run->s.regs.acrs);
if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
save_gs_cb(current->thread.gs_cb);
/* Extended save area */
rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,