VM fails to boot with 256 vCPUs, the detailed command is qemu-system-loongarch64 -smp 256 and there is 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: 47256c4c8b1b ("LoongArch: KVM: Avoid copy_*_user() with lock hold in kvm_eiointc_ctrl_access()")
Signed-off-by: Bibo Mao maobibo@loongson.cn --- arch/loongarch/kvm/intc/eiointc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/kvm/intc/eiointc.c b/arch/loongarch/kvm/intc/eiointc.c index c32333695381..a1cc116b4dac 100644 --- a/arch/loongarch/kvm/intc/eiointc.c +++ b/arch/loongarch/kvm/intc/eiointc.c @@ -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;
base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787