kvm_book3s.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * 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;
    struct rcu_head rcu_head;
    u64 host_vpn;
    u64 pfn;
    ulong slot;
    struct kvmppc_pte pte;
};

struct kvmppc_vcpu_book3s {
    struct kvm_vcpu vcpu;
    struct kvmppc_book3s_shadow_vcpu *shadow_vcpu;
    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;
#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];
    int hpte_cache_count;
    spinlock_t mmu_lock;
};

#define CONTEXT_HOST        0
#define CONTEXT_GUEST       1
#define CONTEXT_GUEST_END   2

#define VSID_REAL   0x1fffffffffc00000ULL
#define VSID_BAT    0x1fffffffffb00000ULL
#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_set_pvr(struct kvm_vcpu *vcpu, u32 pvr);
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);
extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
            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 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_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_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
extern int kvmppc_st(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_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
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_run *run, struct kvm_vcpu *vcpu);
extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
            unsigned long *rmap, long pte_index, int realmode);
extern void kvmppc_invalidate_hpte(struct kvm *kvm, unsigned long *hptep,
            unsigned long pte_index);
void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *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);
extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
            long pte_index, unsigned long pteh, unsigned long ptel);
extern long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
            long pte_index, unsigned long pteh, unsigned long ptel);
extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
            struct kvm_memory_slot *memslot);

extern void kvmppc_entry_trampoline(void);
extern void kvmppc_hv_entry_trampoline(void);
extern void kvmppc_load_up_fpu(void);
extern void kvmppc_load_up_altivec(void);
extern void kvmppc_load_up_vsx(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);

static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
{
    return container_of(vcpu, struct kvmppc_vcpu_book3s, vcpu);
}

extern void kvm_return_point(void);

/* 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

#ifdef CONFIG_KVM_BOOK3S_PR

static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
{
    return to_book3s(vcpu)->hior;
}

static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
            unsigned long pending_now, unsigned long old_pending)
{
    if (pending_now)
        vcpu->arch.shared->int_pending = 1;
    else if (old_pending)
        vcpu->arch.shared->int_pending = 0;
}

static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
{
    if ( num < 14 ) {
        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
        svcpu->gpr[num] = val;
        svcpu_put(svcpu);
        to_book3s(vcpu)->shadow_vcpu->gpr[num] = val;
    } else
        vcpu->arch.gpr[num] = val;
}

static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
{
    if ( num < 14 ) {
        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
        ulong r = svcpu->gpr[num];
        svcpu_put(svcpu);
        return r;
    } else
        return vcpu->arch.gpr[num];
}

static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    svcpu->cr = val;
    svcpu_put(svcpu);
    to_book3s(vcpu)->shadow_vcpu->cr = val;
}

static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    u32 r;
    r = svcpu->cr;
    svcpu_put(svcpu);
    return r;
}

static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    svcpu->xer = val;
    to_book3s(vcpu)->shadow_vcpu->xer = val;
    svcpu_put(svcpu);
}

static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    u32 r;
    r = svcpu->xer;
    svcpu_put(svcpu);
    return r;
}

static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    svcpu->ctr = val;
    svcpu_put(svcpu);
}

static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    ulong r;
    r = svcpu->ctr;
    svcpu_put(svcpu);
    return r;
}

static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    svcpu->lr = val;
    svcpu_put(svcpu);
}

static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    ulong r;
    r = svcpu->lr;
    svcpu_put(svcpu);
    return r;
}

static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    svcpu->pc = val;
    svcpu_put(svcpu);
}

static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    ulong r;
    r = svcpu->pc;
    svcpu_put(svcpu);
    return r;
}

static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
{
    ulong pc = kvmppc_get_pc(vcpu);
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    u32 r;

    /* Load the instruction manually if it failed to do so in the
     * exit path */
    if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
        kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);

    r = svcpu->last_inst;
    svcpu_put(svcpu);
    return r;
}

static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
{
    struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
    ulong r;
    r = svcpu->fault_dar;
    svcpu_put(svcpu);
    return r;
}

static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
{
    ulong crit_raw = vcpu->arch.shared->critical;
    ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
    bool crit;

    /* Truncate crit indicators in 32 bit mode */
    if (!(vcpu->arch.shared->msr & MSR_SF)) {
        crit_raw &= 0xffffffff;
        crit_r1 &= 0xffffffff;
    }

    /* Critical section when crit == r1 */
    crit = (crit_raw == crit_r1);
    /* ... and we're in supervisor mode */
    crit = crit && !(vcpu->arch.shared->msr & MSR_PR);

    return crit;
}
#else /* CONFIG_KVM_BOOK3S_PR */

static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
{
    return 0;
}

static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
            unsigned long pending_now, unsigned long old_pending)
{
}

static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
{
    vcpu->arch.gpr[num] = val;
}

static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
{
    return vcpu->arch.gpr[num];
}

static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
{
    vcpu->arch.cr = val;
}

static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
{
    return vcpu->arch.cr;
}

static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
{
    vcpu->arch.xer = val;
}

static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
{
    return vcpu->arch.xer;
}

static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
{
    vcpu->arch.ctr = val;
}

static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
{
    return vcpu->arch.ctr;
}

static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
{
    vcpu->arch.lr = val;
}

static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
{
    return vcpu->arch.lr;
}

static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
{
    vcpu->arch.pc = val;
}

static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
{
    return vcpu->arch.pc;
}

static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
{
    ulong pc = kvmppc_get_pc(vcpu);

    /* Load the instruction manually if it failed to do so in the
     * exit path */
    if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
        kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);

    return vcpu->arch.last_inst;
}

static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
{
    return vcpu->arch.fault_dar;
}

static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
{
    return false;
}
#endif

/* 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

/* LPIDs we support with this build -- runtime limit may be lower */
#define KVMPPC_NR_LPIDS         (LPID_RSVD + 1)

#endif /* __ASM_KVM_BOOK3S_H__ */