Commit 237e74bf authored by Bibo Mao's avatar Bibo Mao Committed by Huacai Chen
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LoongArch: KVM: Fix max supported vCPUs set with EIOINTC 



VM fails to boot with 256 vCPUs, the detailed command is

  qemu-system-loongarch64 -smp 256

and there is an error reported as follows:

  KVM_LOONGARCH_EXTIOI_INIT_NUM_CPU failed: Invalid argument

There is typo issue in function kvm_eiointc_ctrl_access() when set
max supported vCPUs.

Cc: stable@vger.kernel.org
Fixes: 47256c4c ("LoongArch: KVM: Avoid copy_*_user() with lock hold in kvm_eiointc_ctrl_access()")
Signed-off-by: default avatarBibo Mao <maobibo@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 11f340ec

arch/loongarch/kvm/intc/eiointc.c

+1 −1
Original line number Diff line number Diff line
@@ -439,7 +439,7 @@ static int kvm_eiointc_ctrl_access(struct kvm_device *dev, 
	spin_lock_irqsave(&s->lock, flags);

	switch (type) {

	case KVM_DEV_LOONGARCH_EXTIOI_CTRL_INIT_NUM_CPU:

		if (val >= EIOINTC_ROUTE_MAX_VCPUS)

		if (val > EIOINTC_ROUTE_MAX_VCPUS)

			ret = -EINVAL;

		else

			s->num_cpu = val;