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Reply-To: Sean Christopherson <seanjc@google.com>
Date:   Wed, 30 Nov 2022 23:09:07 +0000
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Subject: [PATCH v2 23/50] KVM: MIPS: Register die notifier prior to kvm_init()
From:   Sean Christopherson <seanjc@google.com>
To:     Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>,
        Huacai Chen <chenhuacai@kernel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
        Anup Patel <anup@brainfault.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        Janosch Frank <frankja@linux.ibm.com>,
        Claudio Imbrenda <imbrenda@linux.ibm.com>,
        Matthew Rosato <mjrosato@linux.ibm.com>,
        Eric Farman <farman@linux.ibm.com>,
        Sean Christopherson <seanjc@google.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        David Woodhouse <dwmw2@infradead.org>,
        Paul Durrant <paul@xen.org>
Cc:     James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Oliver Upton <oliver.upton@linux.dev>,
        Atish Patra <atishp@atishpatra.org>,
        David Hildenbrand <david@redhat.com>, kvm@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
        kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org,
        linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
        linux-kernel@vger.kernel.org, Yuan Yao <yuan.yao@intel.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Isaku Yamahata <isaku.yamahata@intel.com>,
        "=?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?=" <philmd@linaro.org>,
        Fabiano Rosas <farosas@linux.ibm.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Kai Huang <kai.huang@intel.com>, Chao Gao <chao.gao@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>
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Precedence: bulk

Call kvm_init() only after _all_ setup is complete, as kvm_init() exposes
/dev/kvm to userspace and thus allows userspace to create VMs (and call
other ioctls).

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Philippe Mathieu-Daud=C3=A9 <philmd@linaro.org>
---
 arch/mips/kvm/mips.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index 75681281e2df..ae7a24342fdf 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -1640,16 +1640,17 @@ static int __init kvm_mips_init(void)
 	if (ret)
 		return ret;
=20
-	ret =3D kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
-
-	if (ret)
-		return ret;
=20
 	if (boot_cpu_type() =3D=3D CPU_LOONGSON64)
 		kvm_priority_to_irq =3D kvm_loongson3_priority_to_irq;
=20
 	register_die_notifier(&kvm_mips_csr_die_notifier);
=20
+	ret =3D kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
+	if (ret) {
+		unregister_die_notifier(&kvm_mips_csr_die_notifier);
+		return ret;
+	}
 	return 0;
 }
=20
--=20
2.38.1.584.g0f3c55d4c2-goog