161 lines
5.0 KiB
C
161 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright 2016,2017 IBM Corporation.
|
|
*/
|
|
#ifndef _ASM_POWERPC_XIVE_H
|
|
#define _ASM_POWERPC_XIVE_H
|
|
|
|
#define XIVE_INVALID_VP 0xffffffff
|
|
|
|
#ifdef CONFIG_PPC_XIVE
|
|
|
|
/*
|
|
* Thread Interrupt Management Area (TIMA)
|
|
*
|
|
* This is a global MMIO region divided in 4 pages of varying access
|
|
* permissions, providing access to per-cpu interrupt management
|
|
* functions. It always identifies the CPU doing the access based
|
|
* on the PowerBus initiator ID, thus we always access via the
|
|
* same offset regardless of where the code is executing
|
|
*/
|
|
extern void __iomem *xive_tima;
|
|
extern unsigned long xive_tima_os;
|
|
|
|
/*
|
|
* Offset in the TM area of our current execution level (provided by
|
|
* the backend)
|
|
*/
|
|
extern u32 xive_tima_offset;
|
|
|
|
/*
|
|
* Per-irq data (irq_get_handler_data for normal IRQs), IPIs
|
|
* have it stored in the xive_cpu structure. We also cache
|
|
* for normal interrupts the current target CPU.
|
|
*
|
|
* This structure is setup by the backend for each interrupt.
|
|
*/
|
|
struct xive_irq_data {
|
|
u64 flags;
|
|
u64 eoi_page;
|
|
void __iomem *eoi_mmio;
|
|
u64 trig_page;
|
|
void __iomem *trig_mmio;
|
|
u32 esb_shift;
|
|
int src_chip;
|
|
u32 hw_irq;
|
|
|
|
/* Setup/used by frontend */
|
|
int target;
|
|
/*
|
|
* saved_p means that there is a queue entry for this interrupt
|
|
* in some CPU's queue (not including guest vcpu queues), even
|
|
* if P is not set in the source ESB.
|
|
* stale_p means that there is no queue entry for this interrupt
|
|
* in some CPU's queue, even if P is set in the source ESB.
|
|
*/
|
|
bool saved_p;
|
|
bool stale_p;
|
|
};
|
|
#define XIVE_IRQ_FLAG_STORE_EOI 0x01
|
|
#define XIVE_IRQ_FLAG_LSI 0x02
|
|
#define XIVE_IRQ_FLAG_SHIFT_BUG 0x04
|
|
#define XIVE_IRQ_FLAG_MASK_FW 0x08
|
|
#define XIVE_IRQ_FLAG_EOI_FW 0x10
|
|
#define XIVE_IRQ_FLAG_H_INT_ESB 0x20
|
|
|
|
/* Special flag set by KVM for excalation interrupts */
|
|
#define XIVE_IRQ_NO_EOI 0x80
|
|
|
|
#define XIVE_INVALID_CHIP_ID -1
|
|
|
|
/* A queue tracking structure in a CPU */
|
|
struct xive_q {
|
|
__be32 *qpage;
|
|
u32 msk;
|
|
u32 idx;
|
|
u32 toggle;
|
|
u64 eoi_phys;
|
|
u32 esc_irq;
|
|
atomic_t count;
|
|
atomic_t pending_count;
|
|
u64 guest_qaddr;
|
|
u32 guest_qshift;
|
|
};
|
|
|
|
/* Global enable flags for the XIVE support */
|
|
extern bool __xive_enabled;
|
|
|
|
static inline bool xive_enabled(void) { return __xive_enabled; }
|
|
|
|
extern bool xive_spapr_init(void);
|
|
extern bool xive_native_init(void);
|
|
extern void xive_smp_probe(void);
|
|
extern int xive_smp_prepare_cpu(unsigned int cpu);
|
|
extern void xive_smp_setup_cpu(void);
|
|
extern void xive_smp_disable_cpu(void);
|
|
extern void xive_teardown_cpu(void);
|
|
extern void xive_shutdown(void);
|
|
extern void xive_flush_interrupt(void);
|
|
|
|
/* xmon hook */
|
|
extern void xmon_xive_do_dump(int cpu);
|
|
extern int xmon_xive_get_irq_config(u32 hw_irq, struct irq_data *d);
|
|
|
|
/* APIs used by KVM */
|
|
extern u32 xive_native_default_eq_shift(void);
|
|
extern u32 xive_native_alloc_vp_block(u32 max_vcpus);
|
|
extern void xive_native_free_vp_block(u32 vp_base);
|
|
extern int xive_native_populate_irq_data(u32 hw_irq,
|
|
struct xive_irq_data *data);
|
|
extern void xive_cleanup_irq_data(struct xive_irq_data *xd);
|
|
extern u32 xive_native_alloc_irq(void);
|
|
extern void xive_native_free_irq(u32 irq);
|
|
extern int xive_native_configure_irq(u32 hw_irq, u32 target, u8 prio, u32 sw_irq);
|
|
|
|
extern int xive_native_configure_queue(u32 vp_id, struct xive_q *q, u8 prio,
|
|
__be32 *qpage, u32 order, bool can_escalate);
|
|
extern void xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio);
|
|
|
|
extern void xive_native_sync_source(u32 hw_irq);
|
|
extern void xive_native_sync_queue(u32 hw_irq);
|
|
extern bool is_xive_irq(struct irq_chip *chip);
|
|
extern int xive_native_enable_vp(u32 vp_id, bool single_escalation);
|
|
extern int xive_native_disable_vp(u32 vp_id);
|
|
extern int xive_native_get_vp_info(u32 vp_id, u32 *out_cam_id, u32 *out_chip_id);
|
|
extern bool xive_native_has_single_escalation(void);
|
|
|
|
extern int xive_native_get_queue_info(u32 vp_id, uint32_t prio,
|
|
u64 *out_qpage,
|
|
u64 *out_qsize,
|
|
u64 *out_qeoi_page,
|
|
u32 *out_escalate_irq,
|
|
u64 *out_qflags);
|
|
|
|
extern int xive_native_get_queue_state(u32 vp_id, uint32_t prio, u32 *qtoggle,
|
|
u32 *qindex);
|
|
extern int xive_native_set_queue_state(u32 vp_id, uint32_t prio, u32 qtoggle,
|
|
u32 qindex);
|
|
extern int xive_native_get_vp_state(u32 vp_id, u64 *out_state);
|
|
extern bool xive_native_has_queue_state_support(void);
|
|
|
|
#else
|
|
|
|
static inline bool xive_enabled(void) { return false; }
|
|
|
|
static inline bool xive_spapr_init(void) { return false; }
|
|
static inline bool xive_native_init(void) { return false; }
|
|
static inline void xive_smp_probe(void) { }
|
|
static inline int xive_smp_prepare_cpu(unsigned int cpu) { return -EINVAL; }
|
|
static inline void xive_smp_setup_cpu(void) { }
|
|
static inline void xive_smp_disable_cpu(void) { }
|
|
static inline void xive_kexec_teardown_cpu(int secondary) { }
|
|
static inline void xive_shutdown(void) { }
|
|
static inline void xive_flush_interrupt(void) { }
|
|
|
|
static inline u32 xive_native_alloc_vp_block(u32 max_vcpus) { return XIVE_INVALID_VP; }
|
|
static inline void xive_native_free_vp_block(u32 vp_base) { }
|
|
|
|
#endif
|
|
|
|
#endif /* _ASM_POWERPC_XIVE_H */
|