From: Qiang Ma <maqianga@uniontech.com>
To: zhaotianrui@loongson.cn, maobibo@loongson.cn,
chenhuacai@kernel.org, kernel@xen0n.name
Cc: kvm@vger.kernel.org, loongarch@lists.linux.dev,
linux-kernel@vger.kernel.org, Qiang Ma <maqianga@uniontech.com>
Subject: [PATCH] LoongArch: KVM: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
Date: Tue, 28 Apr 2026 15:47:42 +0800 [thread overview]
Message-ID: <20260428074742.2274610-1-maqianga@uniontech.com> (raw)
It doesn't make sense to return the recommended maximum number of
vCPUs which exceeds the maximum possible number of vCPUs.
Other architectures have already done this, such as Commit
57a2e13ebdda ("KVM: MIPS: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS")
Fixes: 482795cb62aa ("LoongArch: KVM: Implement VM related functions")
Signed-off-by: Qiang Ma <maqianga@uniontech.com>
---
arch/loongarch/kvm/vm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c
index 8cc5ee1c53ef..1317c718f896 100644
--- a/arch/loongarch/kvm/vm.c
+++ b/arch/loongarch/kvm/vm.c
@@ -125,7 +125,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = 1;
break;
case KVM_CAP_NR_VCPUS:
- r = num_online_cpus();
+ r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
break;
case KVM_CAP_MAX_VCPUS:
r = KVM_MAX_VCPUS;
--
2.20.1
next reply other threads:[~2026-04-28 7:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-28 7:47 Qiang Ma [this message]
2026-04-28 9:50 ` Bibo Mao
2026-04-28 11:17 ` Qiang Ma
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