diff mbox series

[v2,14/30] KVM: s390: pci: add basic kvm_zdev structure

Message ID 20220114203145.242984-15-mjrosato@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series KVM: s390: enable zPCI for interpretive execution | expand

Commit Message

Matthew Rosato Jan. 14, 2022, 8:31 p.m. UTC
This structure will be used to carry kvm passthrough information related to
zPCI devices.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
---
 arch/s390/include/asm/kvm_pci.h | 29 +++++++++++++++++++++
 arch/s390/include/asm/pci.h     |  3 +++
 arch/s390/kvm/Makefile          |  2 +-
 arch/s390/kvm/pci.c             | 46 +++++++++++++++++++++++++++++++++
 4 files changed, 79 insertions(+), 1 deletion(-)
 create mode 100644 arch/s390/include/asm/kvm_pci.h
 create mode 100644 arch/s390/kvm/pci.c

Comments

Pierre Morel Jan. 17, 2022, 4:25 p.m. UTC | #1
On 1/14/22 21:31, Matthew Rosato wrote:
> This structure will be used to carry kvm passthrough information related to
> zPCI devices.
> 
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
> ---
>   arch/s390/include/asm/kvm_pci.h | 29 +++++++++++++++++++++
>   arch/s390/include/asm/pci.h     |  3 +++
>   arch/s390/kvm/Makefile          |  2 +-
>   arch/s390/kvm/pci.c             | 46 +++++++++++++++++++++++++++++++++
>   4 files changed, 79 insertions(+), 1 deletion(-)
>   create mode 100644 arch/s390/include/asm/kvm_pci.h
>   create mode 100644 arch/s390/kvm/pci.c
> 
> diff --git a/arch/s390/include/asm/kvm_pci.h b/arch/s390/include/asm/kvm_pci.h
> new file mode 100644
> index 000000000000..aafee2976929
> --- /dev/null
> +++ b/arch/s390/include/asm/kvm_pci.h
> @@ -0,0 +1,29 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * KVM PCI Passthrough for virtual machines on s390
> + *
> + * Copyright IBM Corp. 2021
> + *
> + *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
> + */
> +
> +

One blank line too much.

Otherwise, look good to me.

Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>

> +#ifndef ASM_KVM_PCI_H
> +#define ASM_KVM_PCI_H
> +
> +#include <linux/types.h>
> +#include <linux/kvm_types.h>
> +#include <linux/kvm_host.h>
> +#include <linux/kvm.h>
> +#include <linux/pci.h>
> +
> +struct kvm_zdev {
> +	struct zpci_dev *zdev;
> +	struct kvm *kvm;
> +};
> +
> +int kvm_s390_pci_dev_open(struct zpci_dev *zdev);
> +void kvm_s390_pci_dev_release(struct zpci_dev *zdev);
> +void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm);
> +
> +#endif /* ASM_KVM_PCI_H */
> diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
> index f3cd2da8128c..9b6c657d8d31 100644
> --- a/arch/s390/include/asm/pci.h
> +++ b/arch/s390/include/asm/pci.h
> @@ -97,6 +97,7 @@ struct zpci_bar_struct {
>   };
>   
>   struct s390_domain;
> +struct kvm_zdev;
>   
>   #define ZPCI_FUNCTIONS_PER_BUS 256
>   struct zpci_bus {
> @@ -190,6 +191,8 @@ struct zpci_dev {
>   	struct dentry	*debugfs_dev;
>   
>   	struct s390_domain *s390_domain; /* s390 IOMMU domain data */
> +
> +	struct kvm_zdev *kzdev; /* passthrough data */
>   };
>   
>   static inline bool zdev_enabled(struct zpci_dev *zdev)
> diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
> index b3aaadc60ead..a26f4fe7b680 100644
> --- a/arch/s390/kvm/Makefile
> +++ b/arch/s390/kvm/Makefile
> @@ -11,5 +11,5 @@ ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
>   
>   kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o sigp.o
>   kvm-objs += diag.o gaccess.o guestdbg.o vsie.o pv.o
> -
> +kvm-$(CONFIG_PCI) += pci.o
>   obj-$(CONFIG_KVM) += kvm.o
> diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
> new file mode 100644
> index 000000000000..1c33bc7bf2bd
> --- /dev/null
> +++ b/arch/s390/kvm/pci.c
> @@ -0,0 +1,46 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * s390 kvm PCI passthrough support
> + *
> + * Copyright IBM Corp. 2021
> + *
> + *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
> + */
> +
> +#include <linux/kvm_host.h>
> +#include <linux/pci.h>
> +#include <asm/kvm_pci.h>
> +
> +int kvm_s390_pci_dev_open(struct zpci_dev *zdev)
> +{
> +	struct kvm_zdev *kzdev;
> +
> +	kzdev = kzalloc(sizeof(struct kvm_zdev), GFP_KERNEL);
> +	if (!kzdev)
> +		return -ENOMEM;
> +
> +	kzdev->zdev = zdev;
> +	zdev->kzdev = kzdev;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_open);
> +
> +void kvm_s390_pci_dev_release(struct zpci_dev *zdev)
> +{
> +	struct kvm_zdev *kzdev;
> +
> +	kzdev = zdev->kzdev;
> +	WARN_ON(kzdev->zdev != zdev);
> +	zdev->kzdev = 0;
> +	kfree(kzdev);
> +}
> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_release);
> +
> +void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm)
> +{
> +	struct kvm_zdev *kzdev = zdev->kzdev;
> +
> +	kzdev->kvm = kvm;
> +}
> +EXPORT_SYMBOL_GPL(kvm_s390_pci_attach_kvm);
>
Pierre Morel Jan. 18, 2022, 5:32 p.m. UTC | #2
On 1/17/22 17:25, Pierre Morel wrote:
> 
> 
> On 1/14/22 21:31, Matthew Rosato wrote:
>> This structure will be used to carry kvm passthrough information 
>> related to
>> zPCI devices.
>>
>> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
>> ---
>>   arch/s390/include/asm/kvm_pci.h | 29 +++++++++++++++++++++
>>   arch/s390/include/asm/pci.h     |  3 +++
>>   arch/s390/kvm/Makefile          |  2 +-
>>   arch/s390/kvm/pci.c             | 46 +++++++++++++++++++++++++++++++++
>>   4 files changed, 79 insertions(+), 1 deletion(-)
>>   create mode 100644 arch/s390/include/asm/kvm_pci.h
>>   create mode 100644 arch/s390/kvm/pci.c
>>
>> diff --git a/arch/s390/include/asm/kvm_pci.h 
>> b/arch/s390/include/asm/kvm_pci.h
>> new file mode 100644
>> index 000000000000..aafee2976929
>> --- /dev/null
>> +++ b/arch/s390/include/asm/kvm_pci.h
>> @@ -0,0 +1,29 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * KVM PCI Passthrough for virtual machines on s390
>> + *
>> + * Copyright IBM Corp. 2021
>> + *
>> + *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
>> + */
>> +
>> +
> 
> One blank line too much.
> 
> Otherwise, look good to me.
> 
> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
> 
>> +#ifndef ASM_KVM_PCI_H
>> +#define ASM_KVM_PCI_H
>> +
>> +#include <linux/types.h>
>> +#include <linux/kvm_types.h>
>> +#include <linux/kvm_host.h>
>> +#include <linux/kvm.h>
>> +#include <linux/pci.h>
>> +
>> +struct kvm_zdev {
>> +    struct zpci_dev *zdev;
>> +    struct kvm *kvm;
>> +};
>> +
>> +int kvm_s390_pci_dev_open(struct zpci_dev *zdev);
>> +void kvm_s390_pci_dev_release(struct zpci_dev *zdev);
>> +void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm);
>> +
>> +#endif /* ASM_KVM_PCI_H */
>> diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
>> index f3cd2da8128c..9b6c657d8d31 100644
>> --- a/arch/s390/include/asm/pci.h
>> +++ b/arch/s390/include/asm/pci.h
>> @@ -97,6 +97,7 @@ struct zpci_bar_struct {
>>   };
>>   struct s390_domain;
>> +struct kvm_zdev;
>>   #define ZPCI_FUNCTIONS_PER_BUS 256
>>   struct zpci_bus {
>> @@ -190,6 +191,8 @@ struct zpci_dev {
>>       struct dentry    *debugfs_dev;
>>       struct s390_domain *s390_domain; /* s390 IOMMU domain data */
>> +
>> +    struct kvm_zdev *kzdev; /* passthrough data */
>>   };
>>   static inline bool zdev_enabled(struct zpci_dev *zdev)
>> diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
>> index b3aaadc60ead..a26f4fe7b680 100644
>> --- a/arch/s390/kvm/Makefile
>> +++ b/arch/s390/kvm/Makefile
>> @@ -11,5 +11,5 @@ ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
>>   kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o 
>> sigp.o
>>   kvm-objs += diag.o gaccess.o guestdbg.o vsie.o pv.o
>> -
>> +kvm-$(CONFIG_PCI) += pci.o
>>   obj-$(CONFIG_KVM) += kvm.o
>> diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
>> new file mode 100644
>> index 000000000000..1c33bc7bf2bd
>> --- /dev/null
>> +++ b/arch/s390/kvm/pci.c
>> @@ -0,0 +1,46 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * s390 kvm PCI passthrough support
>> + *
>> + * Copyright IBM Corp. 2021
>> + *
>> + *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
>> + */
>> +
>> +#include <linux/kvm_host.h>
>> +#include <linux/pci.h>
>> +#include <asm/kvm_pci.h>
>> +
>> +int kvm_s390_pci_dev_open(struct zpci_dev *zdev)
>> +{
>> +    struct kvm_zdev *kzdev;
>> +
>> +    kzdev = kzalloc(sizeof(struct kvm_zdev), GFP_KERNEL);
>> +    if (!kzdev)
>> +        return -ENOMEM;
>> +
>> +    kzdev->zdev = zdev;
>> +    zdev->kzdev = kzdev;
>> +
>> +    return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_open);
>> +
>> +void kvm_s390_pci_dev_release(struct zpci_dev *zdev)
>> +{
>> +    struct kvm_zdev *kzdev;
>> +
>> +    kzdev = zdev->kzdev;
>> +    WARN_ON(kzdev->zdev != zdev);
>> +    zdev->kzdev = 0;
>> +    kfree(kzdev);
>> +}
>> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_release);
>> +
>> +void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm)
>> +{
>> +    struct kvm_zdev *kzdev = zdev->kzdev;
>> +
>> +    kzdev->kvm = kvm;
>> +}
>> +EXPORT_SYMBOL_GPL(kvm_s390_pci_attach_kvm);
>>
> 

Working now on patch 24, I am not sure that this function is necessary.
the only purpose seems to set kzdev->kvm = kvm while we already know 
kzdev in the caller.
Matthew Rosato Jan. 18, 2022, 6:39 p.m. UTC | #3
On 1/18/22 12:32 PM, Pierre Morel wrote:
> 
> 
> On 1/17/22 17:25, Pierre Morel wrote:
>>
>>
>> On 1/14/22 21:31, Matthew Rosato wrote:
>>> This structure will be used to carry kvm passthrough information 
>>> related to
>>> zPCI devices.
>>>
>>> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
>>> ---
>>>   arch/s390/include/asm/kvm_pci.h | 29 +++++++++++++++++++++
>>>   arch/s390/include/asm/pci.h     |  3 +++
>>>   arch/s390/kvm/Makefile          |  2 +-
>>>   arch/s390/kvm/pci.c             | 46 +++++++++++++++++++++++++++++++++
>>>   4 files changed, 79 insertions(+), 1 deletion(-)
>>>   create mode 100644 arch/s390/include/asm/kvm_pci.h
>>>   create mode 100644 arch/s390/kvm/pci.c
>>>
>>> diff --git a/arch/s390/include/asm/kvm_pci.h 
>>> b/arch/s390/include/asm/kvm_pci.h
>>> new file mode 100644
>>> index 000000000000..aafee2976929
>>> --- /dev/null
>>> +++ b/arch/s390/include/asm/kvm_pci.h
>>> @@ -0,0 +1,29 @@
>>> +/* SPDX-License-Identifier: GPL-2.0 */
>>> +/*
>>> + * KVM PCI Passthrough for virtual machines on s390
>>> + *
>>> + * Copyright IBM Corp. 2021
>>> + *
>>> + *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
>>> + */
>>> +
>>> +
>>
>> One blank line too much.
>>
>> Otherwise, look good to me.
>>
>> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
>>
>>> +#ifndef ASM_KVM_PCI_H
>>> +#define ASM_KVM_PCI_H
>>> +
>>> +#include <linux/types.h>
>>> +#include <linux/kvm_types.h>
>>> +#include <linux/kvm_host.h>
>>> +#include <linux/kvm.h>
>>> +#include <linux/pci.h>
>>> +
>>> +struct kvm_zdev {
>>> +    struct zpci_dev *zdev;
>>> +    struct kvm *kvm;
>>> +};
>>> +
>>> +int kvm_s390_pci_dev_open(struct zpci_dev *zdev);
>>> +void kvm_s390_pci_dev_release(struct zpci_dev *zdev);
>>> +void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm);
>>> +
>>> +#endif /* ASM_KVM_PCI_H */
>>> diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
>>> index f3cd2da8128c..9b6c657d8d31 100644
>>> --- a/arch/s390/include/asm/pci.h
>>> +++ b/arch/s390/include/asm/pci.h
>>> @@ -97,6 +97,7 @@ struct zpci_bar_struct {
>>>   };
>>>   struct s390_domain;
>>> +struct kvm_zdev;
>>>   #define ZPCI_FUNCTIONS_PER_BUS 256
>>>   struct zpci_bus {
>>> @@ -190,6 +191,8 @@ struct zpci_dev {
>>>       struct dentry    *debugfs_dev;
>>>       struct s390_domain *s390_domain; /* s390 IOMMU domain data */
>>> +
>>> +    struct kvm_zdev *kzdev; /* passthrough data */
>>>   };
>>>   static inline bool zdev_enabled(struct zpci_dev *zdev)
>>> diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
>>> index b3aaadc60ead..a26f4fe7b680 100644
>>> --- a/arch/s390/kvm/Makefile
>>> +++ b/arch/s390/kvm/Makefile
>>> @@ -11,5 +11,5 @@ ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
>>>   kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o 
>>> priv.o sigp.o
>>>   kvm-objs += diag.o gaccess.o guestdbg.o vsie.o pv.o
>>> -
>>> +kvm-$(CONFIG_PCI) += pci.o

As discussed in other threads, I will look at changing this to
kvm-$(CONFIG_VFIO_PCI_ZDEV) += pci.o
Along with other IS_ENABLE(CONFIG_PCI) -> 
IS_ENABLED(CONFIG_VFIO_PCI_ZDDEV) changes

>>>   obj-$(CONFIG_KVM) += kvm.o
>>> diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
>>> new file mode 100644
>>> index 000000000000..1c33bc7bf2bd
>>> --- /dev/null
>>> +++ b/arch/s390/kvm/pci.c
>>> @@ -0,0 +1,46 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +/*
>>> + * s390 kvm PCI passthrough support
>>> + *
>>> + * Copyright IBM Corp. 2021
>>> + *
>>> + *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
>>> + */
>>> +
>>> +#include <linux/kvm_host.h>
>>> +#include <linux/pci.h>
>>> +#include <asm/kvm_pci.h>
>>> +
>>> +int kvm_s390_pci_dev_open(struct zpci_dev *zdev)
>>> +{
>>> +    struct kvm_zdev *kzdev;
>>> +
>>> +    kzdev = kzalloc(sizeof(struct kvm_zdev), GFP_KERNEL);
>>> +    if (!kzdev)
>>> +        return -ENOMEM;
>>> +
>>> +    kzdev->zdev = zdev;
>>> +    zdev->kzdev = kzdev;
>>> +
>>> +    return 0;
>>> +}
>>> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_open);
>>> +
>>> +void kvm_s390_pci_dev_release(struct zpci_dev *zdev)
>>> +{
>>> +    struct kvm_zdev *kzdev;
>>> +
>>> +    kzdev = zdev->kzdev;
>>> +    WARN_ON(kzdev->zdev != zdev);
>>> +    zdev->kzdev = 0;
>>> +    kfree(kzdev);
>>> +}
>>> +EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_release);
>>> +
>>> +void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm)
>>> +{
>>> +    struct kvm_zdev *kzdev = zdev->kzdev;
>>> +
>>> +    kzdev->kvm = kvm;
>>> +}
>>> +EXPORT_SYMBOL_GPL(kvm_s390_pci_attach_kvm);
>>>
>>
> 
> Working now on patch 24, I am not sure that this function is necessary.
> the only purpose seems to set kzdev->kvm = kvm while we already know 
> kzdev in the caller.
> 

Yep, as mentioned in the patch 24 thread I will drop this function and 
set kzdev->kvm = kvm directly in patch 24.
diff mbox series

Patch

diff --git a/arch/s390/include/asm/kvm_pci.h b/arch/s390/include/asm/kvm_pci.h
new file mode 100644
index 000000000000..aafee2976929
--- /dev/null
+++ b/arch/s390/include/asm/kvm_pci.h
@@ -0,0 +1,29 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * KVM PCI Passthrough for virtual machines on s390
+ *
+ * Copyright IBM Corp. 2021
+ *
+ *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
+ */
+
+
+#ifndef ASM_KVM_PCI_H
+#define ASM_KVM_PCI_H
+
+#include <linux/types.h>
+#include <linux/kvm_types.h>
+#include <linux/kvm_host.h>
+#include <linux/kvm.h>
+#include <linux/pci.h>
+
+struct kvm_zdev {
+	struct zpci_dev *zdev;
+	struct kvm *kvm;
+};
+
+int kvm_s390_pci_dev_open(struct zpci_dev *zdev);
+void kvm_s390_pci_dev_release(struct zpci_dev *zdev);
+void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm);
+
+#endif /* ASM_KVM_PCI_H */
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index f3cd2da8128c..9b6c657d8d31 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -97,6 +97,7 @@  struct zpci_bar_struct {
 };
 
 struct s390_domain;
+struct kvm_zdev;
 
 #define ZPCI_FUNCTIONS_PER_BUS 256
 struct zpci_bus {
@@ -190,6 +191,8 @@  struct zpci_dev {
 	struct dentry	*debugfs_dev;
 
 	struct s390_domain *s390_domain; /* s390 IOMMU domain data */
+
+	struct kvm_zdev *kzdev; /* passthrough data */
 };
 
 static inline bool zdev_enabled(struct zpci_dev *zdev)
diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
index b3aaadc60ead..a26f4fe7b680 100644
--- a/arch/s390/kvm/Makefile
+++ b/arch/s390/kvm/Makefile
@@ -11,5 +11,5 @@  ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
 
 kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o sigp.o
 kvm-objs += diag.o gaccess.o guestdbg.o vsie.o pv.o
-
+kvm-$(CONFIG_PCI) += pci.o
 obj-$(CONFIG_KVM) += kvm.o
diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
new file mode 100644
index 000000000000..1c33bc7bf2bd
--- /dev/null
+++ b/arch/s390/kvm/pci.c
@@ -0,0 +1,46 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * s390 kvm PCI passthrough support
+ *
+ * Copyright IBM Corp. 2021
+ *
+ *    Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/pci.h>
+#include <asm/kvm_pci.h>
+
+int kvm_s390_pci_dev_open(struct zpci_dev *zdev)
+{
+	struct kvm_zdev *kzdev;
+
+	kzdev = kzalloc(sizeof(struct kvm_zdev), GFP_KERNEL);
+	if (!kzdev)
+		return -ENOMEM;
+
+	kzdev->zdev = zdev;
+	zdev->kzdev = kzdev;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_open);
+
+void kvm_s390_pci_dev_release(struct zpci_dev *zdev)
+{
+	struct kvm_zdev *kzdev;
+
+	kzdev = zdev->kzdev;
+	WARN_ON(kzdev->zdev != zdev);
+	zdev->kzdev = 0;
+	kfree(kzdev);
+}
+EXPORT_SYMBOL_GPL(kvm_s390_pci_dev_release);
+
+void kvm_s390_pci_attach_kvm(struct zpci_dev *zdev, struct kvm *kvm)
+{
+	struct kvm_zdev *kzdev = zdev->kzdev;
+
+	kzdev->kvm = kvm;
+}
+EXPORT_SYMBOL_GPL(kvm_s390_pci_attach_kvm);