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LoongArch: KVM: Make function kvm_own_lbt() robust

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Add the flag KVM_LARCH_LBT checking in function kvm_own_lbt(), so that
it can be called safely rather than duplicated enabling again.

Cc: stable@vger.kernel.org
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao 2025-08-20 22:51:14 +08:00 committed by Huacai Chen
parent 0078e94a47
commit 4be8cefc13
1 changed files with 5 additions and 3 deletions
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8
arch/loongarch/kvm/vcpu.c
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@ -1283,9 +1283,11 @@ int kvm_own_lbt(struct kvm_vcpu *vcpu)
return -EINVAL;
preempt_disable();
set_csr_euen(CSR_EUEN_LBTEN);
_restore_lbt(&vcpu->arch.lbt);
vcpu->arch.aux_inuse |= KVM_LARCH_LBT;
if (!(vcpu->arch.aux_inuse & KVM_LARCH_LBT)) {
set_csr_euen(CSR_EUEN_LBTEN);
_restore_lbt(&vcpu->arch.lbt);
vcpu->arch.aux_inuse |= KVM_LARCH_LBT;
}
preempt_enable();
return 0;