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authorSean Christopherson <seanjc@google.com>2022-12-01 02:08:48 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2022-12-29 23:40:47 +0300
commit73b8dc04132c1f8d4f9250a39f1fc9878ba2ee13 (patch)
tree2e2ed9c922e4f5356a6b5defc606ffa2402560c5 /virt
parentc9650228efbad65c1b9681198f3502de08a42944 (diff)
downloadlinux-73b8dc04132c1f8d4f9250a39f1fc9878ba2ee13.tar.xz
KVM: Teardown VFIO ops earlier in kvm_exit()
Move the call to kvm_vfio_ops_exit() further up kvm_exit() to try and bring some amount of symmetry to the setup order in kvm_init(), and more importantly so that the arch hooks are invoked dead last by kvm_exit(). This will allow arch code to move away from the arch hooks without any change in ordering between arch code and common code in kvm_exit(). That kvm_vfio_ops_exit() is called last appears to be 100% arbitrary. It was bolted on after the fact by commit 571ee1b68598 ("kvm: vfio: fix unregister kvm_device_ops of vfio"). The nullified kvm_device_ops_table is also local to kvm_main.c and is used only when there are active VMs, so unless arch code is doing something truly bizarre, nullifying the table earlier in kvm_exit() is little more than a nop. Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Eric Farman <farman@linux.ibm.com> Message-Id: <20221130230934.1014142-5-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 63983588c93b..70264378da41 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -6049,6 +6049,7 @@ void kvm_exit(void)
for_each_possible_cpu(cpu)
free_cpumask_var(per_cpu(cpu_kick_mask, cpu));
kmem_cache_destroy(kvm_vcpu_cache);
+ kvm_vfio_ops_exit();
kvm_async_pf_deinit();
unregister_syscore_ops(&kvm_syscore_ops);
unregister_reboot_notifier(&kvm_reboot_notifier);
@@ -6058,7 +6059,6 @@ void kvm_exit(void)
free_cpumask_var(cpus_hardware_enabled);
kvm_arch_hardware_unsetup();
kvm_arch_exit();
- kvm_vfio_ops_exit();
}
EXPORT_SYMBOL_GPL(kvm_exit);