1/* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License, version 2, as 4 * published by the Free Software Foundation. 5 * 6 * This program is distributed in the hope that it will be useful, 7 * but WITHOUT ANY WARRANTY; without even the implied warranty of 8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9 * GNU General Public License for more details. 10 * 11 * You should have received a copy of the GNU General Public License 12 * along with this program; if not, write to the Free Software 13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 14 * 15 * Copyright IBM Corp. 2008 16 * 17 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 18 */ 19 20#ifndef __ASM_44X_H__ 21#define __ASM_44X_H__ 22 23#include <linux/kvm_host.h> 24 25#define PPC44x_TLB_SIZE 64 26 27/* If the guest is expecting it, this can be as large as we like; we'd just 28 * need to find some way of advertising it. */ 29#define KVM44x_GUEST_TLB_SIZE 64 30 31struct kvmppc_44x_tlbe { 32 u32 tid; /* Only the low 8 bits are used. */ 33 u32 word0; 34 u32 word1; 35 u32 word2; 36}; 37 38struct kvmppc_44x_shadow_ref { 39 struct page *page; 40 u16 gtlb_index; 41 u8 writeable; 42 u8 tid; 43}; 44 45struct kvmppc_vcpu_44x { 46 /* Unmodified copy of the guest's TLB. */ 47 struct kvmppc_44x_tlbe guest_tlb[KVM44x_GUEST_TLB_SIZE]; 48 49 /* References to guest pages in the hardware TLB. */ 50 struct kvmppc_44x_shadow_ref shadow_refs[PPC44x_TLB_SIZE]; 51 52 /* State of the shadow TLB at guest context switch time. */ 53 struct kvmppc_44x_tlbe shadow_tlb[PPC44x_TLB_SIZE]; 54 u8 shadow_tlb_mod[PPC44x_TLB_SIZE]; 55 56 struct kvm_vcpu vcpu; 57}; 58 59static inline struct kvmppc_vcpu_44x *to_44x(struct kvm_vcpu *vcpu) 60{ 61 return container_of(vcpu, struct kvmppc_vcpu_44x, vcpu); 62} 63 64void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 new_pid); 65void kvmppc_44x_tlb_put(struct kvm_vcpu *vcpu); 66void kvmppc_44x_tlb_load(struct kvm_vcpu *vcpu); 67 68#endif /* __ASM_44X_H__ */ 69