490 lines
17 KiB
C
490 lines
17 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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*
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* Copyright SUSE Linux Products GmbH 2009
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*
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* Authors: Alexander Graf <agraf@suse.de>
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*/
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#ifndef __ASM_KVM_BOOK3S_H__
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#define __ASM_KVM_BOOK3S_H__
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#include <linux/types.h>
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#include <linux/kvm_host.h>
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#include <asm/kvm_book3s_asm.h>
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struct kvmppc_bat {
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u64 raw;
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u32 bepi;
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u32 bepi_mask;
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u32 brpn;
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u8 wimg;
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u8 pp;
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bool vs : 1;
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bool vp : 1;
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};
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struct kvmppc_sid_map {
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u64 guest_vsid;
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u64 guest_esid;
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u64 host_vsid;
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bool valid : 1;
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};
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#define SID_MAP_BITS 9
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#define SID_MAP_NUM (1 << SID_MAP_BITS)
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#define SID_MAP_MASK (SID_MAP_NUM - 1)
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#ifdef CONFIG_PPC_BOOK3S_64
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#define SID_CONTEXTS 1
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#else
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#define SID_CONTEXTS 128
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#define VSID_POOL_SIZE (SID_CONTEXTS * 16)
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#endif
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struct hpte_cache {
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struct hlist_node list_pte;
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struct hlist_node list_pte_long;
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struct hlist_node list_vpte;
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struct hlist_node list_vpte_long;
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#ifdef CONFIG_PPC_BOOK3S_64
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struct hlist_node list_vpte_64k;
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#endif
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struct rcu_head rcu_head;
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u64 host_vpn;
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u64 pfn;
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ulong slot;
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struct kvmppc_pte pte;
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int pagesize;
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};
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/*
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* Struct for a virtual core.
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* Note: entry_exit_map combines a bitmap of threads that have entered
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* in the bottom 8 bits and a bitmap of threads that have exited in the
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* next 8 bits. This is so that we can atomically set the entry bit
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* iff the exit map is 0 without taking a lock.
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*/
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struct kvmppc_vcore {
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int n_runnable;
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int num_threads;
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int entry_exit_map;
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int napping_threads;
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int first_vcpuid;
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u16 pcpu;
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u16 last_cpu;
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u8 vcore_state;
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u8 in_guest;
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struct kvm_vcpu *runnable_threads[MAX_SMT_THREADS];
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struct list_head preempt_list;
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spinlock_t lock;
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struct rcuwait wait;
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spinlock_t stoltb_lock; /* protects stolen_tb and preempt_tb */
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u64 stolen_tb;
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u64 preempt_tb;
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struct kvm_vcpu *runner;
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struct kvm *kvm;
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u64 tb_offset; /* guest timebase - host timebase */
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u64 tb_offset_applied; /* timebase offset currently in force */
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ulong lpcr;
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u32 arch_compat;
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ulong pcr;
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ulong dpdes; /* doorbell state (POWER8) */
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ulong vtb; /* virtual timebase */
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ulong conferring_threads;
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unsigned int halt_poll_ns;
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atomic_t online_count;
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};
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struct kvmppc_vcpu_book3s {
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struct kvmppc_sid_map sid_map[SID_MAP_NUM];
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struct {
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u64 esid;
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u64 vsid;
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} slb_shadow[64];
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u8 slb_shadow_max;
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struct kvmppc_bat ibat[8];
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struct kvmppc_bat dbat[8];
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u64 hid[6];
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u64 gqr[8];
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u64 sdr1;
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u64 hior;
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u64 msr_mask;
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u64 vtb;
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#ifdef CONFIG_PPC_BOOK3S_32
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u32 vsid_pool[VSID_POOL_SIZE];
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u32 vsid_next;
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#else
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u64 proto_vsid_first;
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u64 proto_vsid_max;
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u64 proto_vsid_next;
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#endif
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int context_id[SID_CONTEXTS];
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bool hior_explicit; /* HIOR is set by ioctl, not PVR */
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struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
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struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
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struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
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struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
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#ifdef CONFIG_PPC_BOOK3S_64
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struct hlist_head hpte_hash_vpte_64k[HPTEG_HASH_NUM_VPTE_64K];
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#endif
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int hpte_cache_count;
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spinlock_t mmu_lock;
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};
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#define VSID_REAL 0x07ffffffffc00000ULL
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#define VSID_BAT 0x07ffffffffb00000ULL
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#define VSID_64K 0x0800000000000000ULL
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#define VSID_1T 0x1000000000000000ULL
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#define VSID_REAL_DR 0x2000000000000000ULL
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#define VSID_REAL_IR 0x4000000000000000ULL
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#define VSID_PR 0x8000000000000000ULL
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extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
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extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
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extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
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extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
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extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
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extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
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bool iswrite);
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extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
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extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
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extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
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extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
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extern int kvmppc_book3s_hv_page_fault(struct kvm_vcpu *vcpu,
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unsigned long addr, unsigned long status);
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extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
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unsigned long slb_v, unsigned long valid);
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extern int kvmppc_hv_emulate_mmio(struct kvm_vcpu *vcpu,
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unsigned long gpa, gva_t ea, int is_store);
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extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
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extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte);
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extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
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extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
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extern int kvmppc_mmu_hpte_sysinit(void);
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extern void kvmppc_mmu_hpte_sysexit(void);
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extern int kvmppc_mmu_hv_init(void);
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extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc);
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extern int kvmppc_book3s_radix_page_fault(struct kvm_vcpu *vcpu,
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unsigned long ea, unsigned long dsisr);
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extern unsigned long __kvmhv_copy_tofrom_guest_radix(int lpid, int pid,
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gva_t eaddr, void *to, void *from,
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unsigned long n);
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extern long kvmhv_copy_from_guest_radix(struct kvm_vcpu *vcpu, gva_t eaddr,
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void *to, unsigned long n);
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extern long kvmhv_copy_to_guest_radix(struct kvm_vcpu *vcpu, gva_t eaddr,
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void *from, unsigned long n);
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extern int kvmppc_mmu_walk_radix_tree(struct kvm_vcpu *vcpu, gva_t eaddr,
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struct kvmppc_pte *gpte, u64 root,
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u64 *pte_ret_p);
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extern int kvmppc_mmu_radix_translate_table(struct kvm_vcpu *vcpu, gva_t eaddr,
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struct kvmppc_pte *gpte, u64 table,
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int table_index, u64 *pte_ret_p);
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extern int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
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struct kvmppc_pte *gpte, bool data, bool iswrite);
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extern void kvmppc_radix_tlbie_page(struct kvm *kvm, unsigned long addr,
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unsigned int pshift, unsigned int lpid);
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extern void kvmppc_unmap_pte(struct kvm *kvm, pte_t *pte, unsigned long gpa,
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unsigned int shift,
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const struct kvm_memory_slot *memslot,
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unsigned int lpid);
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extern bool kvmppc_hv_handle_set_rc(struct kvm *kvm, bool nested,
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bool writing, unsigned long gpa,
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unsigned int lpid);
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extern int kvmppc_book3s_instantiate_page(struct kvm_vcpu *vcpu,
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unsigned long gpa,
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struct kvm_memory_slot *memslot,
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bool writing, bool kvm_ro,
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pte_t *inserted_pte, unsigned int *levelp);
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extern int kvmppc_init_vm_radix(struct kvm *kvm);
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extern void kvmppc_free_radix(struct kvm *kvm);
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extern void kvmppc_free_pgtable_radix(struct kvm *kvm, pgd_t *pgd,
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unsigned int lpid);
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extern int kvmppc_radix_init(void);
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extern void kvmppc_radix_exit(void);
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extern void kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
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unsigned long gfn);
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extern bool kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
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unsigned long gfn);
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extern bool kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
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unsigned long gfn);
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extern long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm,
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struct kvm_memory_slot *memslot, unsigned long *map);
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extern void kvmppc_radix_flush_memslot(struct kvm *kvm,
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const struct kvm_memory_slot *memslot);
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extern int kvmhv_get_rmmu_info(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
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/* XXX remove this export when load_last_inst() is generic */
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extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
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extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
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extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
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unsigned int vec);
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extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
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extern void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac);
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extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
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bool upper, u32 val);
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extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
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extern int kvmppc_emulate_paired_single(struct kvm_vcpu *vcpu);
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extern kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa,
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bool writing, bool *writable);
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extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
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unsigned long *rmap, long pte_index, int realmode);
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extern void kvmppc_update_dirty_map(const struct kvm_memory_slot *memslot,
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unsigned long gfn, unsigned long psize);
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extern void kvmppc_invalidate_hpte(struct kvm *kvm, __be64 *hptep,
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unsigned long pte_index);
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void kvmppc_clear_ref_hpte(struct kvm *kvm, __be64 *hptep,
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unsigned long pte_index);
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extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
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unsigned long *nb_ret);
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extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
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unsigned long gpa, bool dirty);
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extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
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long pte_index, unsigned long pteh, unsigned long ptel,
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pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
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extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
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unsigned long pte_index, unsigned long avpn,
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unsigned long *hpret);
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extern long kvmppc_hv_get_dirty_log_hpt(struct kvm *kvm,
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struct kvm_memory_slot *memslot, unsigned long *map);
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extern void kvmppc_harvest_vpa_dirty(struct kvmppc_vpa *vpa,
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struct kvm_memory_slot *memslot,
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unsigned long *map);
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extern unsigned long kvmppc_filter_lpcr_hv(struct kvm *kvm,
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unsigned long lpcr);
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extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
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unsigned long mask);
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extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr);
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extern int kvmhv_p9_tm_emulation_early(struct kvm_vcpu *vcpu);
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extern int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu);
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extern void kvmhv_emulate_tm_rollback(struct kvm_vcpu *vcpu);
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extern void kvmppc_entry_trampoline(void);
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extern void kvmppc_hv_entry_trampoline(void);
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extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
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extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
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extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
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extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm);
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extern int kvmppc_hcall_impl_pr(unsigned long cmd);
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extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
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extern void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu);
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extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu);
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long kvmppc_read_intr(void);
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void kvmppc_bad_interrupt(struct pt_regs *regs);
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void kvmhv_p9_set_lpcr(struct kvm_split_mode *sip);
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void kvmhv_p9_restore_lpcr(struct kvm_split_mode *sip);
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void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr);
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void kvmppc_inject_interrupt_hv(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags);
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#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
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void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu);
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void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu);
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|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Expiry time of vcpu DEC relative to host TB */
|
||
|
|
static inline u64 kvmppc_dec_expires_host_tb(struct kvm_vcpu *vcpu)
|
||
|
|
{
|
||
|
|
return vcpu->arch.dec_expires - vcpu->arch.vcore->tb_offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
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_IDS) 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__ */
|