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/*
* Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Yu Liu <yu.liu@freescale.com>
*
* Description:
* This file is based on arch/powerpc/kvm/44x_tlb.h and
* arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>,
* Copyright IBM Corp. 2007-2008
*
* 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.
*/
#ifndef KVM_E500_H
#define KVM_E500_H
#include <linux/kvm_host.h>
#include <asm/mmu-book3e.h>
#include <asm/tlb.h>
#define E500_PID_NUM 3
#define E500_TLB_NUM 2
#define E500_TLB_VALID 1
#define E500_TLB_DIRTY 2
struct tlbe_ref {
pfn_t pfn;
unsigned int flags; /* E500_TLB_* */
};
struct tlbe_priv {
struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */
};
struct vcpu_id_table;
struct kvmppc_e500_tlb_params {
int entries, ways, sets;
};
struct kvmppc_vcpu_e500 {
struct kvm_vcpu vcpu;
/* Unmodified copy of the guest's TLB -- shared with host userspace. */
struct kvm_book3e_206_tlb_entry *gtlb_arch;
/* Starting entry number in gtlb_arch[] */
int gtlb_offset[E500_TLB_NUM];
/* KVM internal information associated with each guest TLB entry */
struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
unsigned int gtlb_nv[E500_TLB_NUM];
/*
* information associated with each host TLB entry --
* TLB1 only for now. If/when guest TLB1 entries can be
* mapped with host TLB0, this will be used for that too.
*
* We don't want to use this for guest TLB0 because then we'd
* have the overhead of doing the translation again even if
* the entry is still in the guest TLB (e.g. we swapped out
* and back, and our host TLB entries got evicted).
*/
struct tlbe_ref *tlb_refs[E500_TLB_NUM];
unsigned int host_tlb1_nv;
u32 host_pid[E500_PID_NUM];
u32 pid[E500_PID_NUM];
u32 svr;
/* vcpu id table */
struct vcpu_id_table *idt;
u32 l1csr0;
u32 l1csr1;
u32 hid0;
u32 hid1;
u32 tlb0cfg;
u32 tlb1cfg;
u64 mcar;
struct page **shared_tlb_pages;
int num_shared_tlb_pages;
};
static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
{
return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
}
/* This geometry is the legacy default -- can be overridden by userspace */
#define KVM_E500_TLB0_WAY_SIZE 128
#define KVM_E500_TLB0_WAY_NUM 2
#define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
#define KVM_E500_TLB1_SIZE 16
#define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
#define tlbsel_of(index) ((index) >> 16)
#define esel_of(index) ((index) & 0xFFFF)
#define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
#define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
#define MAS2_ATTRIB_MASK \
(MAS2_X0 | MAS2_X1)
#define MAS3_ATTRIB_MASK \
(MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
| E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
extern void kvmppc_e500_tlb_put(struct kvm_vcpu *);
extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int);
extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *);
extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *);
int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
ulong value);
int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb);
int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb);
int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int);
int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
/* TLB helper functions */
static inline unsigned int
get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 7) & 0x1f;
}
static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return tlbe->mas2 & 0xfffff000;
}
static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
{
unsigned int pgsize = get_tlb_size(tlbe);
return 1ULL << 10 << pgsize;
}
static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
{
u64 bytes = get_tlb_bytes(tlbe);
return get_tlb_eaddr(tlbe) + bytes - 1;
}
static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return tlbe->mas7_3 & ~0xfffULL;
}
static inline unsigned int
get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 16) & 0xff;
}
static inline unsigned int
get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 12) & 0x1;
}
static inline unsigned int
get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 31) & 0x1;
}
static inline unsigned int
get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
{
return (tlbe->mas1 >> 30) & 0x1;
}
static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.pid & 0xff;
}
static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
{
return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
}
static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
{
return !!(vcpu->arch.shared->msr & MSR_PR);
}
static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
{
return (vcpu->arch.shared->mas6 >> 16) & 0xff;
}
static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
{
return vcpu->arch.shared->mas6 & 0x1;
}
static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
{
/*
* Manual says that tlbsel has 2 bits wide.
* Since we only have two TLBs, only lower bit is used.
*/
return (vcpu->arch.shared->mas0 >> 28) & 0x1;
}
static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
{
return vcpu->arch.shared->mas0 & 0xfff;
}
static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
{
return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
}
static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
const struct kvm_book3e_206_tlb_entry *tlbe)
{
gpa_t gpa;
if (!get_tlb_v(tlbe))
return 0;
/* Does it match current guest AS? */
/* XXX what about IS != DS? */
if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
return 0;
gpa = get_tlb_raddr(tlbe);
if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
/* Mapping is not for RAM. */
return 0;
return 1;
}
#endif /* KVM_E500_H */
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