KVM: Clean up vm creation and release
IA64 support forces us to abstract the allocation of the kvm structure. But instead of mixing this up with arch-specific initialization and doing the same on destruction, split both steps. This allows to move generic destruction calls into generic code. It also fixes error clean-up on failures of kvm_create_vm for IA64. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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Родитель
9d893c6bc1
Коммит
d89f5eff70
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@ -590,6 +590,10 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu);
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int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
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void kvm_sal_emul(struct kvm_vcpu *vcpu);
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#define __KVM_HAVE_ARCH_VM_ALLOC 1
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struct kvm *kvm_arch_alloc_vm(void);
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void kvm_arch_free_vm(struct kvm *kvm);
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#endif /* __ASSEMBLY__*/
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#endif
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@ -749,7 +749,7 @@ out:
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return r;
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}
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static struct kvm *kvm_alloc_kvm(void)
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struct kvm *kvm_arch_alloc_vm(void)
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{
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struct kvm *kvm;
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@ -760,7 +760,7 @@ static struct kvm *kvm_alloc_kvm(void)
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vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
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if (!vm_base)
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return ERR_PTR(-ENOMEM);
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return NULL;
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memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
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kvm = (struct kvm *)(vm_base +
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@ -806,10 +806,12 @@ static void kvm_build_io_pmt(struct kvm *kvm)
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#define GUEST_PHYSICAL_RR4 0x2739
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#define VMM_INIT_RR 0x1660
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static void kvm_init_vm(struct kvm *kvm)
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int kvm_arch_init_vm(struct kvm *kvm)
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{
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BUG_ON(!kvm);
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kvm->arch.is_sn2 = ia64_platform_is("sn2");
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kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
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kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
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kvm->arch.vmm_init_rr = VMM_INIT_RR;
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@ -823,21 +825,8 @@ static void kvm_init_vm(struct kvm *kvm)
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/* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
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set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
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}
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struct kvm *kvm_arch_create_vm(void)
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{
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struct kvm *kvm = kvm_alloc_kvm();
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if (IS_ERR(kvm))
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return ERR_PTR(-ENOMEM);
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kvm->arch.is_sn2 = ia64_platform_is("sn2");
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kvm_init_vm(kvm);
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return kvm;
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return 0;
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}
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static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
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@ -1357,7 +1346,7 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
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return -EINVAL;
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}
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static void free_kvm(struct kvm *kvm)
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void kvm_arch_free_vm(struct kvm *kvm)
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{
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unsigned long vm_base = kvm->arch.vm_base;
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@ -1399,9 +1388,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
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#endif
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kfree(kvm->arch.vioapic);
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kvm_release_vm_pages(kvm);
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kvm_free_physmem(kvm);
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cleanup_srcu_struct(&kvm->srcu);
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free_kvm(kvm);
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}
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void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
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@ -145,18 +145,12 @@ void kvm_arch_check_processor_compat(void *rtn)
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*(int *)rtn = kvmppc_core_check_processor_compat();
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}
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struct kvm *kvm_arch_create_vm(void)
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int kvm_arch_init_vm(struct kvm *kvm)
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{
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struct kvm *kvm;
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kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
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if (!kvm)
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return ERR_PTR(-ENOMEM);
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return kvm;
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return 0;
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}
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static void kvmppc_free_vcpus(struct kvm *kvm)
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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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unsigned int i;
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struct kvm_vcpu *vcpu;
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@ -176,14 +170,6 @@ void kvm_arch_sync_events(struct kvm *kvm)
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{
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}
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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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kvmppc_free_vcpus(kvm);
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kvm_free_physmem(kvm);
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cleanup_srcu_struct(&kvm->srcu);
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kfree(kvm);
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}
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int kvm_dev_ioctl_check_extension(long ext)
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{
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int r;
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@ -164,24 +164,18 @@ long kvm_arch_vm_ioctl(struct file *filp,
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return r;
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}
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struct kvm *kvm_arch_create_vm(void)
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int kvm_arch_init_vm(struct kvm *kvm)
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{
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struct kvm *kvm;
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int rc;
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char debug_name[16];
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rc = s390_enable_sie();
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if (rc)
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goto out_nokvm;
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rc = -ENOMEM;
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kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
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if (!kvm)
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goto out_nokvm;
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goto out_err;
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kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL);
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if (!kvm->arch.sca)
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goto out_nosca;
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goto out_err;
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sprintf(debug_name, "kvm-%u", current->pid);
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@ -195,13 +189,11 @@ struct kvm *kvm_arch_create_vm(void)
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debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
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VM_EVENT(kvm, 3, "%s", "vm created");
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return kvm;
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return 0;
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out_nodbf:
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free_page((unsigned long)(kvm->arch.sca));
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out_nosca:
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kfree(kvm);
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out_nokvm:
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return ERR_PTR(rc);
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out_err:
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return rc;
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}
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void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
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@ -240,11 +232,8 @@ void kvm_arch_sync_events(struct kvm *kvm)
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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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kvm_free_vcpus(kvm);
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kvm_free_physmem(kvm);
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free_page((unsigned long)(kvm->arch.sca));
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debug_unregister(kvm->arch.dbf);
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cleanup_srcu_struct(&kvm->srcu);
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kfree(kvm);
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}
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/* Section: vcpu related */
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@ -5961,13 +5961,8 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
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free_page((unsigned long)vcpu->arch.pio_data);
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}
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struct kvm *kvm_arch_create_vm(void)
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int kvm_arch_init_vm(struct kvm *kvm)
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{
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struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
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if (!kvm)
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return ERR_PTR(-ENOMEM);
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INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
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INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
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@ -5976,7 +5971,7 @@ struct kvm *kvm_arch_create_vm(void)
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spin_lock_init(&kvm->arch.tsc_write_lock);
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return kvm;
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return 0;
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}
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static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
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@ -6021,13 +6016,10 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
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kfree(kvm->arch.vpic);
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kfree(kvm->arch.vioapic);
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kvm_free_vcpus(kvm);
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kvm_free_physmem(kvm);
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if (kvm->arch.apic_access_page)
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put_page(kvm->arch.apic_access_page);
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if (kvm->arch.ept_identity_pagetable)
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put_page(kvm->arch.ept_identity_pagetable);
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cleanup_srcu_struct(&kvm->srcu);
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kfree(kvm);
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}
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int kvm_arch_prepare_memory_region(struct kvm *kvm,
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@ -16,6 +16,7 @@
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#include <linux/mm.h>
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#include <linux/preempt.h>
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#include <linux/msi.h>
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#include <linux/slab.h>
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#include <asm/signal.h>
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#include <linux/kvm.h>
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@ -441,7 +442,19 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
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void kvm_free_physmem(struct kvm *kvm);
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struct kvm *kvm_arch_create_vm(void);
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#ifndef __KVM_HAVE_ARCH_VM_ALLOC
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static inline struct kvm *kvm_arch_alloc_vm(void)
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{
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return kzalloc(sizeof(struct kvm), GFP_KERNEL);
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}
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static inline void kvm_arch_free_vm(struct kvm *kvm)
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{
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kfree(kvm);
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}
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#endif
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int kvm_arch_init_vm(struct kvm *kvm);
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void kvm_arch_destroy_vm(struct kvm *kvm);
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void kvm_free_all_assigned_devices(struct kvm *kvm);
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void kvm_arch_sync_events(struct kvm *kvm);
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@ -383,11 +383,15 @@ static int kvm_init_mmu_notifier(struct kvm *kvm)
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static struct kvm *kvm_create_vm(void)
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{
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int r = 0, i;
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struct kvm *kvm = kvm_arch_create_vm();
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int r, i;
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struct kvm *kvm = kvm_arch_alloc_vm();
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if (IS_ERR(kvm))
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goto out;
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if (!kvm)
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return ERR_PTR(-ENOMEM);
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r = kvm_arch_init_vm(kvm);
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if (r)
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goto out_err_nodisable;
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r = hardware_enable_all();
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if (r)
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@ -427,7 +431,7 @@ static struct kvm *kvm_create_vm(void)
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spin_lock(&kvm_lock);
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list_add(&kvm->vm_list, &vm_list);
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spin_unlock(&kvm_lock);
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out:
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return kvm;
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out_err:
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@ -438,7 +442,7 @@ out_err_nodisable:
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for (i = 0; i < KVM_NR_BUSES; i++)
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kfree(kvm->buses[i]);
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kfree(kvm->memslots);
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kfree(kvm);
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kvm_arch_free_vm(kvm);
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return ERR_PTR(r);
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}
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@ -512,6 +516,9 @@ static void kvm_destroy_vm(struct kvm *kvm)
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kvm_arch_flush_shadow(kvm);
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#endif
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kvm_arch_destroy_vm(kvm);
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kvm_free_physmem(kvm);
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cleanup_srcu_struct(&kvm->srcu);
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kvm_arch_free_vm(kvm);
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hardware_disable_all();
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mmdrop(mm);
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}
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