Commit 9159c5e7 authored by Bibo Mao's avatar Bibo Mao Committed by Huacai Chen
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LoongArch: KVM: Add address alignment check for IOCSR emulation 



IOCSR instruction supports 1/2/4/8 bytes access, the address should be
naturally aligned with its access size. Here address alignment check is
added in the EIOINTC kernel emulation.

Cc: stable@vger.kernel.org
Fixes: 3956a52b ("LoongArch: KVM: Add EIOINTC read and write functions")
Signed-off-by: default avatarBibo Mao <maobibo@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 080e8d2e

arch/loongarch/kvm/intc/eiointc.c

+10 −0
Original line number Diff line number Diff line
@@ -305,6 +305,11 @@ static int kvm_eiointc_read(struct kvm_vcpu *vcpu, 
		return -EINVAL;

	}



	if (addr & (len - 1)) {

		kvm_err("%s: eiointc not aligned addr %llx len %d\n", __func__, addr, len);

		return -EINVAL;

	}



	vcpu->kvm->stat.eiointc_read_exits++;

	spin_lock_irqsave(&eiointc->lock, flags);

	switch (len) {
@@ -676,6 +681,11 @@ static int kvm_eiointc_write(struct kvm_vcpu *vcpu, 
		return -EINVAL;

	}



	if (addr & (len - 1)) {

		kvm_err("%s: eiointc not aligned addr %llx len %d\n", __func__, addr, len);

		return -EINVAL;

	}



	vcpu->kvm->stat.eiointc_write_exits++;

	spin_lock_irqsave(&eiointc->lock, flags);

	switch (len) {