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KVM: s390: Introduce import_lock

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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>
This commit is contained in:
Claudio Imbrenda 2026-02-04 16:02:35 +01:00
parent c98175b791
commit cf3ce3d69d
2 changed files with 4 additions and 0 deletions
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2
arch/s390/include/asm/kvm_host.h
View File

@ -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 {

2
arch/s390/kvm/kvm-s390.c
View File

@ -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)