We need to reset the usage state of the pages on kexec/kdump,
which use subcode 0 and 1. We will only do the cmma reset in
the kernel, everything else is done in userspace as before.
Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com>
---
arch/s390/kvm/diag.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
index 03a05ff..08dfc83 100644
--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -167,6 +167,10 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
VCPU_EVENT(vcpu, 5, "diag ipl functions, subcode %lx", subcode);
switch (subcode) {
+ case 0:
+ case 1:
+ page_table_reset_pgste(current->mm, 0, TASK_SIZE);
+ return -EOPNOTSUPP;
case 3:
vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;
page_table_reset_pgste(current->mm, 0, TASK_SIZE);
--
1.8.4.2
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