154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright 2012 Michael Ellerman, IBM Corporation.
|
|
* Copyright 2012 Benjamin Herrenschmidt, IBM Corporation
|
|
*/
|
|
|
|
#ifndef _KVM_PPC_BOOK3S_XICS_H
|
|
#define _KVM_PPC_BOOK3S_XICS_H
|
|
|
|
#ifdef CONFIG_KVM_XICS
|
|
/*
|
|
* We use a two-level tree to store interrupt source information.
|
|
* There are up to 1024 ICS nodes, each of which can represent
|
|
* 1024 sources.
|
|
*/
|
|
#define KVMPPC_XICS_MAX_ICS_ID 1023
|
|
#define KVMPPC_XICS_ICS_SHIFT 10
|
|
#define KVMPPC_XICS_IRQ_PER_ICS (1 << KVMPPC_XICS_ICS_SHIFT)
|
|
#define KVMPPC_XICS_SRC_MASK (KVMPPC_XICS_IRQ_PER_ICS - 1)
|
|
|
|
/*
|
|
* Interrupt source numbers below this are reserved, for example
|
|
* 0 is "no interrupt", and 2 is used for IPIs.
|
|
*/
|
|
#define KVMPPC_XICS_FIRST_IRQ 16
|
|
#define KVMPPC_XICS_NR_IRQS ((KVMPPC_XICS_MAX_ICS_ID + 1) * \
|
|
KVMPPC_XICS_IRQ_PER_ICS)
|
|
|
|
/* Priority value to use for disabling an interrupt */
|
|
#define MASKED 0xff
|
|
|
|
#define PQ_PRESENTED 1
|
|
#define PQ_QUEUED 2
|
|
|
|
/* State for one irq source */
|
|
struct ics_irq_state {
|
|
u32 number;
|
|
u32 server;
|
|
u32 pq_state;
|
|
u8 priority;
|
|
u8 saved_priority;
|
|
u8 resend;
|
|
u8 masked_pending;
|
|
u8 lsi; /* level-sensitive interrupt */
|
|
u8 exists;
|
|
int intr_cpu;
|
|
u32 host_irq;
|
|
};
|
|
|
|
/* Atomic ICP state, updated with a single compare & swap */
|
|
union kvmppc_icp_state {
|
|
unsigned long raw;
|
|
struct {
|
|
u8 out_ee:1;
|
|
u8 need_resend:1;
|
|
u8 cppr;
|
|
u8 mfrr;
|
|
u8 pending_pri;
|
|
u32 xisr;
|
|
};
|
|
};
|
|
|
|
/* One bit per ICS */
|
|
#define ICP_RESEND_MAP_SIZE (KVMPPC_XICS_MAX_ICS_ID / BITS_PER_LONG + 1)
|
|
|
|
struct kvmppc_icp {
|
|
struct kvm_vcpu *vcpu;
|
|
unsigned long server_num;
|
|
union kvmppc_icp_state state;
|
|
unsigned long resend_map[ICP_RESEND_MAP_SIZE];
|
|
|
|
/* Real mode might find something too hard, here's the action
|
|
* it might request from virtual mode
|
|
*/
|
|
#define XICS_RM_KICK_VCPU 0x1
|
|
#define XICS_RM_CHECK_RESEND 0x2
|
|
#define XICS_RM_NOTIFY_EOI 0x8
|
|
u32 rm_action;
|
|
struct kvm_vcpu *rm_kick_target;
|
|
struct kvmppc_icp *rm_resend_icp;
|
|
u32 rm_reject;
|
|
u32 rm_eoied_irq;
|
|
|
|
/* Counters for each reason we exited real mode */
|
|
unsigned long n_rm_kick_vcpu;
|
|
unsigned long n_rm_check_resend;
|
|
unsigned long n_rm_notify_eoi;
|
|
/* Counters for handling ICP processing in real mode */
|
|
unsigned long n_check_resend;
|
|
unsigned long n_reject;
|
|
|
|
/* Debug stuff for real mode */
|
|
union kvmppc_icp_state rm_dbgstate;
|
|
struct kvm_vcpu *rm_dbgtgt;
|
|
};
|
|
|
|
struct kvmppc_ics {
|
|
arch_spinlock_t lock;
|
|
u16 icsid;
|
|
struct ics_irq_state irq_state[KVMPPC_XICS_IRQ_PER_ICS];
|
|
};
|
|
|
|
struct kvmppc_xics {
|
|
struct kvm *kvm;
|
|
struct kvm_device *dev;
|
|
struct dentry *dentry;
|
|
u32 max_icsid;
|
|
bool real_mode;
|
|
bool real_mode_dbg;
|
|
u32 err_noics;
|
|
u32 err_noicp;
|
|
struct kvmppc_ics *ics[KVMPPC_XICS_MAX_ICS_ID + 1];
|
|
};
|
|
|
|
static inline struct kvmppc_icp *kvmppc_xics_find_server(struct kvm *kvm,
|
|
u32 nr)
|
|
{
|
|
struct kvm_vcpu *vcpu = NULL;
|
|
unsigned long i;
|
|
|
|
kvm_for_each_vcpu(i, vcpu, kvm) {
|
|
if (vcpu->arch.icp && nr == vcpu->arch.icp->server_num)
|
|
return vcpu->arch.icp;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct kvmppc_ics *kvmppc_xics_find_ics(struct kvmppc_xics *xics,
|
|
u32 irq, u16 *source)
|
|
{
|
|
u32 icsid = irq >> KVMPPC_XICS_ICS_SHIFT;
|
|
u16 src = irq & KVMPPC_XICS_SRC_MASK;
|
|
struct kvmppc_ics *ics;
|
|
|
|
if (source)
|
|
*source = src;
|
|
if (icsid > KVMPPC_XICS_MAX_ICS_ID)
|
|
return NULL;
|
|
ics = xics->ics[icsid];
|
|
if (!ics)
|
|
return NULL;
|
|
return ics;
|
|
}
|
|
|
|
extern unsigned long xics_rm_h_xirr(struct kvm_vcpu *vcpu);
|
|
extern unsigned long xics_rm_h_xirr_x(struct kvm_vcpu *vcpu);
|
|
extern int xics_rm_h_ipi(struct kvm_vcpu *vcpu, unsigned long server,
|
|
unsigned long mfrr);
|
|
extern int xics_rm_h_cppr(struct kvm_vcpu *vcpu, unsigned long cppr);
|
|
extern int xics_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr);
|
|
|
|
#endif /* CONFIG_KVM_XICS */
|
|
#endif /* _KVM_PPC_BOOK3S_XICS_H */
|