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| author |   Bibo Mao <maobibo@loongson.cn> | 2025-11-09 16:02:09 +0800 |
|---|---|---|
| committer |   Huacai Chen <chenhuacai@loongson.cn> | 2025-11-10 08:37:07 +0800 |
| commit | 237e74bfa261fb0cf75bd08c9be0c5094018ee20 (patch) | |
| tree | c9732344a0f15e15087493b1af0eee10f3083d13 | |
| parent | LoongArch: KVM: Skip PMU checking on vCPU context switch (diff) | |
| download | wireguard-linux-237e74bfa261fb0cf75bd08c9be0c5094018ee20.tar.xz wireguard-linux-237e74bfa261fb0cf75bd08c9be0c5094018ee20.zip | |
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: 47256c4c8b1b ("LoongArch: KVM: Avoid copy_*_user() with lock hold in kvm_eiointc_ctrl_access()")
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
| -rw-r--r-- | arch/loongarch/kvm/intc/eiointc.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; |