88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* s390 kvm PCI passthrough support
|
|
*
|
|
* Copyright IBM Corp. 2022
|
|
*
|
|
* Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
|
|
*/
|
|
|
|
#ifndef __KVM_S390_PCI_H
|
|
#define __KVM_S390_PCI_H
|
|
|
|
#include <linux/kvm.h>
|
|
#include <linux/kvm_host.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/pci.h>
|
|
#include <asm/airq.h>
|
|
#include <asm/cpu.h>
|
|
|
|
struct kvm_zdev {
|
|
struct zpci_dev *zdev;
|
|
struct kvm *kvm;
|
|
struct zpci_fib fib;
|
|
struct list_head entry;
|
|
};
|
|
|
|
struct zpci_gaite {
|
|
u32 gisa;
|
|
u8 gisc;
|
|
u8 count;
|
|
u8 reserved;
|
|
u8 aisbo;
|
|
u64 aisb;
|
|
};
|
|
|
|
struct zpci_aift {
|
|
struct zpci_gaite *gait;
|
|
struct airq_iv *sbv;
|
|
struct kvm_zdev **kzdev;
|
|
spinlock_t gait_lock; /* Protects the gait, used during AEN forward */
|
|
struct mutex aift_lock; /* Protects the other structures in aift */
|
|
};
|
|
|
|
extern struct zpci_aift *aift;
|
|
|
|
static inline struct kvm *kvm_s390_pci_si_to_kvm(struct zpci_aift *aift,
|
|
unsigned long si)
|
|
{
|
|
if (!IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM) || !aift->kzdev ||
|
|
!aift->kzdev[si])
|
|
return NULL;
|
|
return aift->kzdev[si]->kvm;
|
|
};
|
|
|
|
int kvm_s390_pci_aen_init(u8 nisc);
|
|
void kvm_s390_pci_aen_exit(void);
|
|
|
|
void kvm_s390_pci_init_list(struct kvm *kvm);
|
|
void kvm_s390_pci_clear_list(struct kvm *kvm);
|
|
|
|
int kvm_s390_pci_zpci_op(struct kvm *kvm, struct kvm_s390_zpci_op *args);
|
|
|
|
int kvm_s390_pci_init(void);
|
|
void kvm_s390_pci_exit(void);
|
|
|
|
static inline bool kvm_s390_pci_interp_allowed(void)
|
|
{
|
|
struct cpuid cpu_id;
|
|
|
|
get_cpu_id(&cpu_id);
|
|
switch (cpu_id.machine) {
|
|
case 0x2817:
|
|
case 0x2818:
|
|
case 0x2827:
|
|
case 0x2828:
|
|
case 0x2964:
|
|
case 0x2965:
|
|
/* No SHM on certain machines */
|
|
return false;
|
|
default:
|
|
return (IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM) &&
|
|
sclp.has_zpci_lsi && sclp.has_aeni && sclp.has_aisi &&
|
|
sclp.has_aisii);
|
|
}
|
|
}
|
|
|
|
#endif /* __KVM_S390_PCI_H */
|