Commit 1b6a19b3 authored Mar 31, 2014 by Christian Borntraeger Committed by Martin Schwidefsky Apr 01, 2014

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



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>

parent 12797e8e

arch/s390/kvm/diag.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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);