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KVM: s390: Fix locking in kvm_s390_set_mem_control()

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Add the missing locking around dat_reset_cmma().

Fixes: e38c884df9 ("KVM: s390: Switch to new gmap")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260623153331.233784-7-imbrenda@linux.ibm.com>
This commit is contained in:
Claudio Imbrenda 2026-06-23 17:33:27 +02:00
parent 2bd74dce08
commit 9b0bf9b93c
1 changed files with 3 additions and 1 deletions
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4
arch/s390/kvm/kvm-s390.c
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@ -990,9 +990,11 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *att
if (!kvm->arch.use_cmma)
break;
guard(mutex)(&kvm->lock);
VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
do {
start_gfn = dat_reset_cmma(kvm->arch.gmap->asce, start_gfn);
scoped_guard(read_lock, &kvm->mmu_lock)
start_gfn = dat_reset_cmma(kvm->arch.gmap->asce, start_gfn);
cond_resched();
} while (start_gfn);
ret = 0;