From: Sean Christopherson Date: Wed, 30 Nov 2022 23:08:47 +0000 (+0000) Subject: KVM: Allocate cpus_hardware_enabled after arch hardware setup X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c9650228efbad65c1b9681198f3502de08a42944;p=linux.git KVM: Allocate cpus_hardware_enabled after arch hardware setup Allocate cpus_hardware_enabled after arch hardware setup so that arch "init" and "hardware setup" are called back-to-back and thus can be combined in a future patch. cpus_hardware_enabled is never used before kvm_create_vm(), i.e. doesn't have a dependency with hardware setup and only needs to be allocated before /dev/kvm is exposed to userspace. Free the object before the arch hooks are invoked to maintain symmetry, and so that arch code can move away from the hooks without having to worry about ordering changes. Signed-off-by: Sean Christopherson Reviewed-by: Yuan Yao Message-Id: <20221130230934.1014142-4-seanjc@google.com> Signed-off-by: Paolo Bonzini --- diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 6793a7e3525ad..63983588c93b6 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -5931,15 +5931,15 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, if (r) return r; + r = kvm_arch_hardware_setup(opaque); + if (r < 0) + goto err_hw_setup; + if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { r = -ENOMEM; goto err_hw_enabled; } - r = kvm_arch_hardware_setup(opaque); - if (r < 0) - goto out_free_1; - c.ret = &r; c.opaque = opaque; for_each_online_cpu(cpu) { @@ -6025,10 +6025,10 @@ out_free_3: unregister_reboot_notifier(&kvm_reboot_notifier); cpuhp_remove_state_nocalls(CPUHP_AP_KVM_STARTING); out_free_2: - kvm_arch_hardware_unsetup(); -out_free_1: free_cpumask_var(cpus_hardware_enabled); err_hw_enabled: + kvm_arch_hardware_unsetup(); +err_hw_setup: kvm_arch_exit(); return r; } @@ -6055,9 +6055,9 @@ void kvm_exit(void) cpuhp_remove_state_nocalls(CPUHP_AP_KVM_STARTING); on_each_cpu(hardware_disable_nolock, NULL, 1); kvm_irqfd_exit(); + free_cpumask_var(cpus_hardware_enabled); kvm_arch_hardware_unsetup(); kvm_arch_exit(); - free_cpumask_var(cpus_hardware_enabled); kvm_vfio_ops_exit(); } EXPORT_SYMBOL_GPL(kvm_exit);