Commit cf3ce3d6 authored Feb 04, 2026 by Claudio Imbrenda

KVM: s390: Introduce import_lock



Introduce import_lock to avoid future races when converting pages to
secure.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

parent c98175b7

arch/s390/include/asm/kvm_host.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -630,6 +630,8 @@ struct kvm_s390_pv {
		void *set_aside;
		struct list_head need_cleanup;
		struct mmu_notifier mmu_notifier;
		/* Protects against concurrent import-like operations */
		struct mutex import_lock;
		};

		struct kvm_arch {

arch/s390/kvm/kvm-s390.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -3330,6 +3330,8 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
		char debug_name[16];
		int i, rc;

		mutex_init(&kvm->arch.pv.import_lock);

		rc = -EINVAL;
		#ifdef CONFIG_KVM_S390_UCONTROL
		if (type & ~KVM_VM_S390_UCONTROL)