Commit fc849ba4 authored by Yiwen Jiang's avatar Yiwen Jiang Committed by Zheng Zengkai
Browse files

kvm: arm/arm64: add irqsave for lpi_cache_lock 

euleros inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4J0W7


CVE: NA

-------------------------------------------------

lpi_cache_lock can be called in irq context,
so it should use irqsave spinlock.

Signed-off-by: default avatarYiwen Jiang <jiangyiwen@huawei.com>
Reviewed-by: default avatarHailiang Zhang <zhang.zhanghailiang@huawei.com>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: default avatarChaochao Xing <xingchaochao@huawei.com>
Reviewed-by: default avatarXiangyou Xie <xiexiangyou@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent c89f1e49

arch/arm64/kvm/vgic/vgic-its.c

+3 −2
Original line number Diff line number Diff line
@@ -593,15 +593,16 @@ static struct vgic_irq *vgic_its_check_cache(struct kvm *kvm, phys_addr_t db, 
{

	struct vgic_dist *dist = &kvm->arch.vgic;

	struct vgic_irq *irq;

	unsigned long flags;

	int cpu;

	int cacheid;



	cpu = smp_processor_id();

	cacheid = cpu % LPI_TRANS_CACHES_NUM;



	raw_spin_lock(&dist->lpi_translation_cache[cacheid].lpi_cache_lock);

	raw_spin_lock_irqsave(&dist->lpi_translation_cache[cacheid].lpi_cache_lock, flags);

	irq = __vgic_its_check_cache(dist, db, devid, eventid, cacheid);

	raw_spin_unlock(&dist->lpi_translation_cache[cacheid].lpi_cache_lock);

	raw_spin_unlock_irqrestore(&dist->lpi_translation_cache[cacheid].lpi_cache_lock, flags);



	return irq;

}