mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
483 lines
17 KiB
483 lines
17 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* |
|
* |
|
* Copyright SUSE Linux Products GmbH 2009 |
|
* |
|
* Authors: Alexander Graf <[email protected]> |
|
*/ |
|
|
|
#ifndef __ASM_KVM_BOOK3S_H__ |
|
#define __ASM_KVM_BOOK3S_H__ |
|
|
|
#include <linux/types.h> |
|
#include <linux/kvm_host.h> |
|
#include <asm/kvm_book3s_asm.h> |
|
|
|
struct kvmppc_bat { |
|
u64 raw; |
|
u32 bepi; |
|
u32 bepi_mask; |
|
u32 brpn; |
|
u8 wimg; |
|
u8 pp; |
|
bool vs : 1; |
|
bool vp : 1; |
|
}; |
|
|
|
struct kvmppc_sid_map { |
|
u64 guest_vsid; |
|
u64 guest_esid; |
|
u64 host_vsid; |
|
bool valid : 1; |
|
}; |
|
|
|
#define SID_MAP_BITS 9 |
|
#define SID_MAP_NUM (1 << SID_MAP_BITS) |
|
#define SID_MAP_MASK (SID_MAP_NUM - 1) |
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64 |
|
#define SID_CONTEXTS 1 |
|
#else |
|
#define SID_CONTEXTS 128 |
|
#define VSID_POOL_SIZE (SID_CONTEXTS * 16) |
|
#endif |
|
|
|
struct hpte_cache { |
|
struct hlist_node list_pte; |
|
struct hlist_node list_pte_long; |
|
struct hlist_node list_vpte; |
|
struct hlist_node list_vpte_long; |
|
#ifdef CONFIG_PPC_BOOK3S_64 |
|
struct hlist_node list_vpte_64k; |
|
#endif |
|
struct rcu_head rcu_head; |
|
u64 host_vpn; |
|
u64 pfn; |
|
ulong slot; |
|
struct kvmppc_pte pte; |
|
int pagesize; |
|
}; |
|
|
|
/* |
|
* Struct for a virtual core. |
|
* Note: entry_exit_map combines a bitmap of threads that have entered |
|
* in the bottom 8 bits and a bitmap of threads that have exited in the |
|
* next 8 bits. This is so that we can atomically set the entry bit |
|
* iff the exit map is 0 without taking a lock. |
|
*/ |
|
struct kvmppc_vcore { |
|
int n_runnable; |
|
int num_threads; |
|
int entry_exit_map; |
|
int napping_threads; |
|
int first_vcpuid; |
|
u16 pcpu; |
|
u16 last_cpu; |
|
u8 vcore_state; |
|
u8 in_guest; |
|
struct kvm_vcpu *runnable_threads[MAX_SMT_THREADS]; |
|
struct list_head preempt_list; |
|
spinlock_t lock; |
|
struct rcuwait wait; |
|
spinlock_t stoltb_lock; /* protects stolen_tb and preempt_tb */ |
|
u64 stolen_tb; |
|
u64 preempt_tb; |
|
struct kvm_vcpu *runner; |
|
struct kvm *kvm; |
|
u64 tb_offset; /* guest timebase - host timebase */ |
|
u64 tb_offset_applied; /* timebase offset currently in force */ |
|
ulong lpcr; |
|
u32 arch_compat; |
|
ulong pcr; |
|
ulong dpdes; /* doorbell state (POWER8) */ |
|
ulong vtb; /* virtual timebase */ |
|
ulong conferring_threads; |
|
unsigned int halt_poll_ns; |
|
atomic_t online_count; |
|
}; |
|
|
|
struct kvmppc_vcpu_book3s { |
|
struct kvmppc_sid_map sid_map[SID_MAP_NUM]; |
|
struct { |
|
u64 esid; |
|
u64 vsid; |
|
} slb_shadow[64]; |
|
u8 slb_shadow_max; |
|
struct kvmppc_bat ibat[8]; |
|
struct kvmppc_bat dbat[8]; |
|
u64 hid[6]; |
|
u64 gqr[8]; |
|
u64 sdr1; |
|
u64 hior; |
|
u64 msr_mask; |
|
u64 vtb; |
|
#ifdef CONFIG_PPC_BOOK3S_32 |
|
u32 vsid_pool[VSID_POOL_SIZE]; |
|
u32 vsid_next; |
|
#else |
|
u64 proto_vsid_first; |
|
u64 proto_vsid_max; |
|
u64 proto_vsid_next; |
|
#endif |
|
int context_id[SID_CONTEXTS]; |
|
|
|
bool hior_explicit; /* HIOR is set by ioctl, not PVR */ |
|
|
|
struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE]; |
|
struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG]; |
|
struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE]; |
|
struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG]; |
|
#ifdef CONFIG_PPC_BOOK3S_64 |
|
struct hlist_head hpte_hash_vpte_64k[HPTEG_HASH_NUM_VPTE_64K]; |
|
#endif |
|
int hpte_cache_count; |
|
spinlock_t mmu_lock; |
|
}; |
|
|
|
#define VSID_REAL 0x07ffffffffc00000ULL |
|
#define VSID_BAT 0x07ffffffffb00000ULL |
|
#define VSID_64K 0x0800000000000000ULL |
|
#define VSID_1T 0x1000000000000000ULL |
|
#define VSID_REAL_DR 0x2000000000000000ULL |
|
#define VSID_REAL_IR 0x4000000000000000ULL |
|
#define VSID_PR 0x8000000000000000ULL |
|
|
|
extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask); |
|
extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask); |
|
extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end); |
|
extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr); |
|
extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu); |
|
extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu); |
|
extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu); |
|
extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte, |
|
bool iswrite); |
|
extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte); |
|
extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr); |
|
extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size); |
|
extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu); |
|
extern int kvmppc_book3s_hv_page_fault(struct kvm_vcpu *vcpu, |
|
unsigned long addr, unsigned long status); |
|
extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr, |
|
unsigned long slb_v, unsigned long valid); |
|
extern int kvmppc_hv_emulate_mmio(struct kvm_vcpu *vcpu, |
|
unsigned long gpa, gva_t ea, int is_store); |
|
|
|
extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte); |
|
extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu); |
|
extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte); |
|
extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu); |
|
extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu); |
|
extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte); |
|
extern int kvmppc_mmu_hpte_sysinit(void); |
|
extern void kvmppc_mmu_hpte_sysexit(void); |
|
extern int kvmppc_mmu_hv_init(void); |
|
extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc); |
|
|
|
extern int kvmppc_book3s_radix_page_fault(struct kvm_vcpu *vcpu, |
|
unsigned long ea, unsigned long dsisr); |
|
extern unsigned long __kvmhv_copy_tofrom_guest_radix(int lpid, int pid, |
|
gva_t eaddr, void *to, void *from, |
|
unsigned long n); |
|
extern long kvmhv_copy_from_guest_radix(struct kvm_vcpu *vcpu, gva_t eaddr, |
|
void *to, unsigned long n); |
|
extern long kvmhv_copy_to_guest_radix(struct kvm_vcpu *vcpu, gva_t eaddr, |
|
void *from, unsigned long n); |
|
extern int kvmppc_mmu_walk_radix_tree(struct kvm_vcpu *vcpu, gva_t eaddr, |
|
struct kvmppc_pte *gpte, u64 root, |
|
u64 *pte_ret_p); |
|
extern int kvmppc_mmu_radix_translate_table(struct kvm_vcpu *vcpu, gva_t eaddr, |
|
struct kvmppc_pte *gpte, u64 table, |
|
int table_index, u64 *pte_ret_p); |
|
extern int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, |
|
struct kvmppc_pte *gpte, bool data, bool iswrite); |
|
extern void kvmppc_radix_tlbie_page(struct kvm *kvm, unsigned long addr, |
|
unsigned int pshift, unsigned int lpid); |
|
extern void kvmppc_unmap_pte(struct kvm *kvm, pte_t *pte, unsigned long gpa, |
|
unsigned int shift, |
|
const struct kvm_memory_slot *memslot, |
|
unsigned int lpid); |
|
extern bool kvmppc_hv_handle_set_rc(struct kvm *kvm, bool nested, |
|
bool writing, unsigned long gpa, |
|
unsigned int lpid); |
|
extern int kvmppc_book3s_instantiate_page(struct kvm_vcpu *vcpu, |
|
unsigned long gpa, |
|
struct kvm_memory_slot *memslot, |
|
bool writing, bool kvm_ro, |
|
pte_t *inserted_pte, unsigned int *levelp); |
|
extern int kvmppc_init_vm_radix(struct kvm *kvm); |
|
extern void kvmppc_free_radix(struct kvm *kvm); |
|
extern void kvmppc_free_pgtable_radix(struct kvm *kvm, pgd_t *pgd, |
|
unsigned int lpid); |
|
extern int kvmppc_radix_init(void); |
|
extern void kvmppc_radix_exit(void); |
|
extern void kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, |
|
unsigned long gfn); |
|
extern bool kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, |
|
unsigned long gfn); |
|
extern bool kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, |
|
unsigned long gfn); |
|
extern long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm, |
|
struct kvm_memory_slot *memslot, unsigned long *map); |
|
extern void kvmppc_radix_flush_memslot(struct kvm *kvm, |
|
const struct kvm_memory_slot *memslot); |
|
extern int kvmhv_get_rmmu_info(struct kvm *kvm, struct kvm_ppc_rmmu_info *info); |
|
|
|
/* XXX remove this export when load_last_inst() is generic */ |
|
extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data); |
|
extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec); |
|
extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu, |
|
unsigned int vec); |
|
extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags); |
|
extern void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac); |
|
extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, |
|
bool upper, u32 val); |
|
extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr); |
|
extern int kvmppc_emulate_paired_single(struct kvm_vcpu *vcpu); |
|
extern kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, |
|
bool writing, bool *writable); |
|
extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev, |
|
unsigned long *rmap, long pte_index, int realmode); |
|
extern void kvmppc_update_dirty_map(const struct kvm_memory_slot *memslot, |
|
unsigned long gfn, unsigned long psize); |
|
extern void kvmppc_invalidate_hpte(struct kvm *kvm, __be64 *hptep, |
|
unsigned long pte_index); |
|
void kvmppc_clear_ref_hpte(struct kvm *kvm, __be64 *hptep, |
|
unsigned long pte_index); |
|
extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr, |
|
unsigned long *nb_ret); |
|
extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr, |
|
unsigned long gpa, bool dirty); |
|
extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, |
|
long pte_index, unsigned long pteh, unsigned long ptel, |
|
pgd_t *pgdir, bool realmode, unsigned long *idx_ret); |
|
extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags, |
|
unsigned long pte_index, unsigned long avpn, |
|
unsigned long *hpret); |
|
extern long kvmppc_hv_get_dirty_log_hpt(struct kvm *kvm, |
|
struct kvm_memory_slot *memslot, unsigned long *map); |
|
extern void kvmppc_harvest_vpa_dirty(struct kvmppc_vpa *vpa, |
|
struct kvm_memory_slot *memslot, |
|
unsigned long *map); |
|
extern unsigned long kvmppc_filter_lpcr_hv(struct kvm *kvm, |
|
unsigned long lpcr); |
|
extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, |
|
unsigned long mask); |
|
extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr); |
|
|
|
extern int kvmhv_p9_tm_emulation_early(struct kvm_vcpu *vcpu); |
|
extern int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu); |
|
extern void kvmhv_emulate_tm_rollback(struct kvm_vcpu *vcpu); |
|
|
|
extern void kvmppc_entry_trampoline(void); |
|
extern void kvmppc_hv_entry_trampoline(void); |
|
extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst); |
|
extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst); |
|
extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd); |
|
extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm); |
|
extern int kvmppc_hcall_impl_pr(unsigned long cmd); |
|
extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd); |
|
extern void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu); |
|
extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu); |
|
|
|
long kvmppc_read_intr(void); |
|
void kvmppc_bad_interrupt(struct pt_regs *regs); |
|
void kvmhv_p9_set_lpcr(struct kvm_split_mode *sip); |
|
void kvmhv_p9_restore_lpcr(struct kvm_split_mode *sip); |
|
void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr); |
|
void kvmppc_inject_interrupt_hv(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags); |
|
|
|
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
|
void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu); |
|
void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu); |
|
void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu); |
|
void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu); |
|
#else |
|
static inline void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu) {} |
|
static inline void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu) {} |
|
static inline void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu) {} |
|
static inline void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu) {} |
|
#endif |
|
|
|
long kvmhv_nested_init(void); |
|
void kvmhv_nested_exit(void); |
|
void kvmhv_vm_nested_init(struct kvm *kvm); |
|
long kvmhv_set_partition_table(struct kvm_vcpu *vcpu); |
|
long kvmhv_copy_tofrom_guest_nested(struct kvm_vcpu *vcpu); |
|
void kvmhv_set_ptbl_entry(unsigned int lpid, u64 dw0, u64 dw1); |
|
void kvmhv_release_all_nested(struct kvm *kvm); |
|
long kvmhv_enter_nested_guest(struct kvm_vcpu *vcpu); |
|
long kvmhv_do_nested_tlbie(struct kvm_vcpu *vcpu); |
|
long do_h_rpt_invalidate_pat(struct kvm_vcpu *vcpu, unsigned long lpid, |
|
unsigned long type, unsigned long pg_sizes, |
|
unsigned long start, unsigned long end); |
|
int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, |
|
u64 time_limit, unsigned long lpcr); |
|
void kvmhv_save_hv_regs(struct kvm_vcpu *vcpu, struct hv_guest_state *hr); |
|
void kvmhv_restore_hv_return_state(struct kvm_vcpu *vcpu, |
|
struct hv_guest_state *hr); |
|
long int kvmhv_nested_page_fault(struct kvm_vcpu *vcpu); |
|
|
|
void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac); |
|
|
|
extern int kvm_irq_bypass; |
|
|
|
static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu) |
|
{ |
|
return vcpu->arch.book3s; |
|
} |
|
|
|
/* Also add subarch specific defines */ |
|
|
|
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER |
|
#include <asm/kvm_book3s_32.h> |
|
#endif |
|
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER |
|
#include <asm/kvm_book3s_64.h> |
|
#endif |
|
|
|
static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val) |
|
{ |
|
vcpu->arch.regs.gpr[num] = val; |
|
} |
|
|
|
static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num) |
|
{ |
|
return vcpu->arch.regs.gpr[num]; |
|
} |
|
|
|
static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val) |
|
{ |
|
vcpu->arch.regs.ccr = val; |
|
} |
|
|
|
static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu) |
|
{ |
|
return vcpu->arch.regs.ccr; |
|
} |
|
|
|
static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, ulong val) |
|
{ |
|
vcpu->arch.regs.xer = val; |
|
} |
|
|
|
static inline ulong kvmppc_get_xer(struct kvm_vcpu *vcpu) |
|
{ |
|
return vcpu->arch.regs.xer; |
|
} |
|
|
|
static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val) |
|
{ |
|
vcpu->arch.regs.ctr = val; |
|
} |
|
|
|
static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu) |
|
{ |
|
return vcpu->arch.regs.ctr; |
|
} |
|
|
|
static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val) |
|
{ |
|
vcpu->arch.regs.link = val; |
|
} |
|
|
|
static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu) |
|
{ |
|
return vcpu->arch.regs.link; |
|
} |
|
|
|
static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val) |
|
{ |
|
vcpu->arch.regs.nip = val; |
|
} |
|
|
|
static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu) |
|
{ |
|
return vcpu->arch.regs.nip; |
|
} |
|
|
|
static inline u64 kvmppc_get_msr(struct kvm_vcpu *vcpu); |
|
static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu) |
|
{ |
|
return (kvmppc_get_msr(vcpu) & MSR_LE) != (MSR_KERNEL & MSR_LE); |
|
} |
|
|
|
static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu) |
|
{ |
|
return vcpu->arch.fault_dar; |
|
} |
|
|
|
static inline bool is_kvmppc_resume_guest(int r) |
|
{ |
|
return (r == RESUME_GUEST || r == RESUME_GUEST_NV); |
|
} |
|
|
|
static inline bool is_kvmppc_hv_enabled(struct kvm *kvm); |
|
static inline bool kvmppc_supports_magic_page(struct kvm_vcpu *vcpu) |
|
{ |
|
/* Only PR KVM supports the magic page */ |
|
return !is_kvmppc_hv_enabled(vcpu->kvm); |
|
} |
|
|
|
extern int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu); |
|
extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu); |
|
|
|
/* Magic register values loaded into r3 and r4 before the 'sc' assembly |
|
* instruction for the OSI hypercalls */ |
|
#define OSI_SC_MAGIC_R3 0x113724FA |
|
#define OSI_SC_MAGIC_R4 0x77810F9B |
|
|
|
#define INS_DCBZ 0x7c0007ec |
|
/* TO = 31 for unconditional trap */ |
|
#define INS_TW 0x7fe00008 |
|
|
|
#define SPLIT_HACK_MASK 0xff000000 |
|
#define SPLIT_HACK_OFFS 0xfb000000 |
|
|
|
/* |
|
* This packs a VCPU ID from the [0..KVM_MAX_VCPU_ID) space down to the |
|
* [0..KVM_MAX_VCPUS) space, using knowledge of the guest's core stride |
|
* (but not its actual threading mode, which is not available) to avoid |
|
* collisions. |
|
* |
|
* The implementation leaves VCPU IDs from the range [0..KVM_MAX_VCPUS) (block |
|
* 0) unchanged: if the guest is filling each VCORE completely then it will be |
|
* using consecutive IDs and it will fill the space without any packing. |
|
* |
|
* For higher VCPU IDs, the packed ID is based on the VCPU ID modulo |
|
* KVM_MAX_VCPUS (effectively masking off the top bits) and then an offset is |
|
* added to avoid collisions. |
|
* |
|
* VCPU IDs in the range [KVM_MAX_VCPUS..(KVM_MAX_VCPUS*2)) (block 1) are only |
|
* possible if the guest is leaving at least 1/2 of each VCORE empty, so IDs |
|
* can be safely packed into the second half of each VCORE by adding an offset |
|
* of (stride / 2). |
|
* |
|
* Similarly, if VCPU IDs in the range [(KVM_MAX_VCPUS*2)..(KVM_MAX_VCPUS*4)) |
|
* (blocks 2 and 3) are seen, the guest must be leaving at least 3/4 of each |
|
* VCORE empty so packed IDs can be offset by (stride / 4) and (stride * 3 / 4). |
|
* |
|
* Finally, VCPU IDs from blocks 5..7 will only be seen if the guest is using a |
|
* stride of 8 and 1 thread per core so the remaining offsets of 1, 5, 3 and 7 |
|
* must be free to use. |
|
* |
|
* (The offsets for each block are stored in block_offsets[], indexed by the |
|
* block number if the stride is 8. For cases where the guest's stride is less |
|
* than 8, we can re-use the block_offsets array by multiplying the block |
|
* number by (MAX_SMT_THREADS / stride) to reach the correct entry.) |
|
*/ |
|
static inline u32 kvmppc_pack_vcpu_id(struct kvm *kvm, u32 id) |
|
{ |
|
const int block_offsets[MAX_SMT_THREADS] = {0, 4, 2, 6, 1, 5, 3, 7}; |
|
int stride = kvm->arch.emul_smt_mode; |
|
int block = (id / KVM_MAX_VCPUS) * (MAX_SMT_THREADS / stride); |
|
u32 packed_id; |
|
|
|
if (WARN_ONCE(block >= MAX_SMT_THREADS, "VCPU ID too large to pack")) |
|
return 0; |
|
packed_id = (id % KVM_MAX_VCPUS) + block_offsets[block]; |
|
if (WARN_ONCE(packed_id >= KVM_MAX_VCPUS, "VCPU ID packing failed")) |
|
return 0; |
|
return packed_id; |
|
} |
|
|
|
#endif /* __ASM_KVM_BOOK3S_H__ */
|
|
|