mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 18:10:50 +07:00
af669ac6dc
iodev.h contains definitions for the kvm_io_bus framework. This is needed both by the generic KVM code in virt/kvm as well as by architecture specific code under arch/. Putting the header file in virt/kvm and using local includes in the architecture part seems at least dodgy to me, so let's move the file into include/kvm, so that a more natural "#include <kvm/iodev.h>" can be used by all of the code. This also solves a problem later when using struct kvm_io_device in arm_vgic.h. Fixing up the FSF address in the GPL header and a wrong include path on the way. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __KVM_IODEV_H__
|
|
#define __KVM_IODEV_H__
|
|
|
|
#include <linux/kvm_types.h>
|
|
#include <linux/errno.h>
|
|
|
|
struct kvm_io_device;
|
|
struct kvm_vcpu;
|
|
|
|
/**
|
|
* kvm_io_device_ops are called under kvm slots_lock.
|
|
* read and write handlers return 0 if the transaction has been handled,
|
|
* or non-zero to have it passed to the next device.
|
|
**/
|
|
struct kvm_io_device_ops {
|
|
int (*read)(struct kvm_vcpu *vcpu,
|
|
struct kvm_io_device *this,
|
|
gpa_t addr,
|
|
int len,
|
|
void *val);
|
|
int (*write)(struct kvm_vcpu *vcpu,
|
|
struct kvm_io_device *this,
|
|
gpa_t addr,
|
|
int len,
|
|
const void *val);
|
|
void (*destructor)(struct kvm_io_device *this);
|
|
};
|
|
|
|
|
|
struct kvm_io_device {
|
|
const struct kvm_io_device_ops *ops;
|
|
};
|
|
|
|
static inline void kvm_iodevice_init(struct kvm_io_device *dev,
|
|
const struct kvm_io_device_ops *ops)
|
|
{
|
|
dev->ops = ops;
|
|
}
|
|
|
|
static inline int kvm_iodevice_read(struct kvm_vcpu *vcpu,
|
|
struct kvm_io_device *dev, gpa_t addr,
|
|
int l, void *v)
|
|
{
|
|
return dev->ops->read ? dev->ops->read(vcpu, dev, addr, l, v)
|
|
: -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int kvm_iodevice_write(struct kvm_vcpu *vcpu,
|
|
struct kvm_io_device *dev, gpa_t addr,
|
|
int l, const void *v)
|
|
{
|
|
return dev->ops->write ? dev->ops->write(vcpu, dev, addr, l, v)
|
|
: -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
|
|
{
|
|
if (dev->ops->destructor)
|
|
dev->ops->destructor(dev);
|
|
}
|
|
|
|
#endif /* __KVM_IODEV_H__ */
|