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>
This commit is contained in:
Jan Kiszka 2010-11-09 17:02:49 +01:00 коммит произвёл Avi Kivity
Родитель 9d893c6bc1
Коммит d89f5eff70
7 изменённых файлов: 49 добавлений и 72 удалений

Просмотреть файл

@ -590,6 +590,10 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu);
int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
void kvm_sal_emul(struct kvm_vcpu *vcpu);
#define __KVM_HAVE_ARCH_VM_ALLOC 1
struct kvm *kvm_arch_alloc_vm(void);
void kvm_arch_free_vm(struct kvm *kvm);
#endif /* __ASSEMBLY__*/
#endif

Просмотреть файл

@ -749,7 +749,7 @@ out:
return r;
}
static struct kvm *kvm_alloc_kvm(void)
struct kvm *kvm_arch_alloc_vm(void)
{
struct kvm *kvm;
@ -760,7 +760,7 @@ static struct kvm *kvm_alloc_kvm(void)
vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
if (!vm_base)
return ERR_PTR(-ENOMEM);
return NULL;
memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
kvm = (struct kvm *)(vm_base +
@ -806,10 +806,12 @@ static void kvm_build_io_pmt(struct kvm *kvm)
#define GUEST_PHYSICAL_RR4 0x2739
#define VMM_INIT_RR 0x1660
static void kvm_init_vm(struct kvm *kvm)
int kvm_arch_init_vm(struct kvm *kvm)
{
BUG_ON(!kvm);
kvm->arch.is_sn2 = ia64_platform_is("sn2");
kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
kvm->arch.vmm_init_rr = VMM_INIT_RR;
@ -823,21 +825,8 @@ static void kvm_init_vm(struct kvm *kvm)
/* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
}
struct kvm *kvm_arch_create_vm(void)
{
struct kvm *kvm = kvm_alloc_kvm();
if (IS_ERR(kvm))
return ERR_PTR(-ENOMEM);
kvm->arch.is_sn2 = ia64_platform_is("sn2");
kvm_init_vm(kvm);
return kvm;
return 0;
}
static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
@ -1357,7 +1346,7 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
return -EINVAL;
}
static void free_kvm(struct kvm *kvm)
void kvm_arch_free_vm(struct kvm *kvm)
{
unsigned long vm_base = kvm->arch.vm_base;
@ -1399,9 +1388,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
#endif
kfree(kvm->arch.vioapic);
kvm_release_vm_pages(kvm);
kvm_free_physmem(kvm);
cleanup_srcu_struct(&kvm->srcu);
free_kvm(kvm);
}
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)

Просмотреть файл

@ -145,18 +145,12 @@ void kvm_arch_check_processor_compat(void *rtn)
*(int *)rtn = kvmppc_core_check_processor_compat();
}
struct kvm *kvm_arch_create_vm(void)
int kvm_arch_init_vm(struct kvm *kvm)
{
struct kvm *kvm;
kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
if (!kvm)
return ERR_PTR(-ENOMEM);
return kvm;
return 0;
}
static void kvmppc_free_vcpus(struct kvm *kvm)
void kvm_arch_destroy_vm(struct kvm *kvm)
{
unsigned int i;
struct kvm_vcpu *vcpu;
@ -176,14 +170,6 @@ void kvm_arch_sync_events(struct kvm *kvm)
{
}
void kvm_arch_destroy_vm(struct kvm *kvm)
{
kvmppc_free_vcpus(kvm);
kvm_free_physmem(kvm);
cleanup_srcu_struct(&kvm->srcu);
kfree(kvm);
}
int kvm_dev_ioctl_check_extension(long ext)
{
int r;

Просмотреть файл

@ -164,24 +164,18 @@ long kvm_arch_vm_ioctl(struct file *filp,
return r;
}
struct kvm *kvm_arch_create_vm(void)
int kvm_arch_init_vm(struct kvm *kvm)
{
struct kvm *kvm;
int rc;
char debug_name[16];
rc = s390_enable_sie();
if (rc)
goto out_nokvm;
rc = -ENOMEM;
kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
if (!kvm)
goto out_nokvm;
goto out_err;
kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL);
if (!kvm->arch.sca)
goto out_nosca;
goto out_err;
sprintf(debug_name, "kvm-%u", current->pid);
@ -195,13 +189,11 @@ struct kvm *kvm_arch_create_vm(void)
debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
VM_EVENT(kvm, 3, "%s", "vm created");
return kvm;
return 0;
out_nodbf:
free_page((unsigned long)(kvm->arch.sca));
out_nosca:
kfree(kvm);
out_nokvm:
return ERR_PTR(rc);
out_err:
return rc;
}
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
@ -240,11 +232,8 @@ void kvm_arch_sync_events(struct kvm *kvm)
void kvm_arch_destroy_vm(struct kvm *kvm)
{
kvm_free_vcpus(kvm);
kvm_free_physmem(kvm);
free_page((unsigned long)(kvm->arch.sca));
debug_unregister(kvm->arch.dbf);
cleanup_srcu_struct(&kvm->srcu);
kfree(kvm);
}
/* Section: vcpu related */

Просмотреть файл

@ -5961,13 +5961,8 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
free_page((unsigned long)vcpu->arch.pio_data);
}
struct kvm *kvm_arch_create_vm(void)
int kvm_arch_init_vm(struct kvm *kvm)
{
struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
if (!kvm)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
@ -5976,7 +5971,7 @@ struct kvm *kvm_arch_create_vm(void)
spin_lock_init(&kvm->arch.tsc_write_lock);
return kvm;
return 0;
}
static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
@ -6021,13 +6016,10 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kfree(kvm->arch.vpic);
kfree(kvm->arch.vioapic);
kvm_free_vcpus(kvm);
kvm_free_physmem(kvm);
if (kvm->arch.apic_access_page)
put_page(kvm->arch.apic_access_page);
if (kvm->arch.ept_identity_pagetable)
put_page(kvm->arch.ept_identity_pagetable);
cleanup_srcu_struct(&kvm->srcu);
kfree(kvm);
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,

Просмотреть файл

@ -16,6 +16,7 @@
#include <linux/mm.h>
#include <linux/preempt.h>
#include <linux/msi.h>
#include <linux/slab.h>
#include <asm/signal.h>
#include <linux/kvm.h>
@ -441,7 +442,19 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
void kvm_free_physmem(struct kvm *kvm);
struct kvm *kvm_arch_create_vm(void);
#ifndef __KVM_HAVE_ARCH_VM_ALLOC
static inline struct kvm *kvm_arch_alloc_vm(void)
{
return kzalloc(sizeof(struct kvm), GFP_KERNEL);
}
static inline void kvm_arch_free_vm(struct kvm *kvm)
{
kfree(kvm);
}
#endif
int kvm_arch_init_vm(struct kvm *kvm);
void kvm_arch_destroy_vm(struct kvm *kvm);
void kvm_free_all_assigned_devices(struct kvm *kvm);
void kvm_arch_sync_events(struct kvm *kvm);

Просмотреть файл

@ -383,11 +383,15 @@ static int kvm_init_mmu_notifier(struct kvm *kvm)
static struct kvm *kvm_create_vm(void)
{
int r = 0, i;
struct kvm *kvm = kvm_arch_create_vm();
int r, i;
struct kvm *kvm = kvm_arch_alloc_vm();
if (IS_ERR(kvm))
goto out;
if (!kvm)
return ERR_PTR(-ENOMEM);
r = kvm_arch_init_vm(kvm);
if (r)
goto out_err_nodisable;
r = hardware_enable_all();
if (r)
@ -427,7 +431,7 @@ static struct kvm *kvm_create_vm(void)
spin_lock(&kvm_lock);
list_add(&kvm->vm_list, &vm_list);
spin_unlock(&kvm_lock);
out:
return kvm;
out_err:
@ -438,7 +442,7 @@ out_err_nodisable:
for (i = 0; i < KVM_NR_BUSES; i++)
kfree(kvm->buses[i]);
kfree(kvm->memslots);
kfree(kvm);
kvm_arch_free_vm(kvm);
return ERR_PTR(r);
}
@ -512,6 +516,9 @@ static void kvm_destroy_vm(struct kvm *kvm)
kvm_arch_flush_shadow(kvm);
#endif
kvm_arch_destroy_vm(kvm);
kvm_free_physmem(kvm);
cleanup_srcu_struct(&kvm->srcu);
kvm_arch_free_vm(kvm);
hardware_disable_all();
mmdrop(mm);
}