From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- drivers/s390/crypto/vfio_ap_private.h | 104 ++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 drivers/s390/crypto/vfio_ap_private.h (limited to 'drivers/s390/crypto/vfio_ap_private.h') diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h new file mode 100644 index 000000000..28e9d9989 --- /dev/null +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Private data and functions for adjunct processor VFIO matrix driver. + * + * Author(s): Tony Krowiak + * Halil Pasic + * Pierre Morel + * + * Copyright IBM Corp. 2018 + */ + +#ifndef _VFIO_AP_PRIVATE_H_ +#define _VFIO_AP_PRIVATE_H_ + +#include +#include +#include +#include +#include +#include + +#include "ap_bus.h" + +#define VFIO_AP_MODULE_NAME "vfio_ap" +#define VFIO_AP_DRV_NAME "vfio_ap" + +/** + * ap_matrix_dev - the AP matrix device structure + * @device: generic device structure associated with the AP matrix device + * @available_instances: number of mediated matrix devices that can be created + * @info: the struct containing the output from the PQAP(QCI) instruction + * mdev_list: the list of mediated matrix devices created + * lock: mutex for locking the AP matrix device. This lock will be + * taken every time we fiddle with state managed by the vfio_ap + * driver, be it using @mdev_list or writing the state of a + * single ap_matrix_mdev device. It's quite coarse but we don't + * expect much contention. + */ +struct ap_matrix_dev { + struct device device; + atomic_t available_instances; + struct ap_config_info info; + struct list_head mdev_list; + struct mutex lock; + struct ap_driver *vfio_ap_drv; +}; + +extern struct ap_matrix_dev *matrix_dev; + +/** + * The AP matrix is comprised of three bit masks identifying the adapters, + * queues (domains) and control domains that belong to an AP matrix. The bits i + * each mask, from least significant to most significant bit, correspond to IDs + * 0 to 255. When a bit is set, the corresponding ID belongs to the matrix. + * + * @apm_max: max adapter number in @apm + * @apm identifies the AP adapters in the matrix + * @aqm_max: max domain number in @aqm + * @aqm identifies the AP queues (domains) in the matrix + * @adm_max: max domain number in @adm + * @adm identifies the AP control domains in the matrix + */ +struct ap_matrix { + unsigned long apm_max; + DECLARE_BITMAP(apm, 256); + unsigned long aqm_max; + DECLARE_BITMAP(aqm, 256); + unsigned long adm_max; + DECLARE_BITMAP(adm, 256); +}; + +/** + * struct ap_matrix_mdev - the mediated matrix device structure + * @list: allows the ap_matrix_mdev struct to be added to a list + * @matrix: the adapters, usage domains and control domains assigned to the + * mediated matrix device. + * @group_notifier: notifier block used for specifying callback function for + * handling the VFIO_GROUP_NOTIFY_SET_KVM event + * @kvm: the struct holding guest's state + */ +struct ap_matrix_mdev { + struct list_head node; + struct ap_matrix matrix; + struct notifier_block group_notifier; + struct notifier_block iommu_notifier; + struct kvm *kvm; + struct kvm_s390_module_hook pqap_hook; + struct mdev_device *mdev; +}; + +struct vfio_ap_queue { + struct ap_matrix_mdev *matrix_mdev; + unsigned long saved_pfn; + int apqn; +#define VFIO_AP_ISC_INVALID 0xff + unsigned char saved_isc; +}; + +int vfio_ap_mdev_register(void); +void vfio_ap_mdev_unregister(void); +int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q, + unsigned int retry); + +#endif /* _VFIO_AP_PRIVATE_H_ */ -- cgit v1.2.3