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kvm/s390: also set guest pages back to stable on kexec/kdump

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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 <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2014-03-31 09:44:30 +02:00 committed by Martin Schwidefsky
parent 12797e8e9d
commit 1b6a19b34d
1 changed files with 4 additions and 0 deletions
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4
arch/s390/kvm/diag.c
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@ -85,6 +85,10 @@ 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);