arch/powerpc/include/asm/kvm_ppc.h

   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 __POWERPC_KVM_PPC_H__
  21 #define __POWERPC_KVM_PPC_H__
  22
  23 /* This file exists just so we can dereference kvm_vcpu, avoiding nested header
  24  * dependencies. */
  25
  26 #include <linux/mutex.h>
  27 #include <linux/timer.h>
  28 #include <linux/types.h>
  29 #include <linux/kvm_types.h>
  30 #include <linux/kvm_host.h>
  31
  32 struct kvm_tlb {
  33         struct tlbe guest_tlb[PPC44x_TLB_SIZE];
  34         struct tlbe shadow_tlb[PPC44x_TLB_SIZE];
  35 };
  36
  37 enum emulation_result {
  38         EMULATE_DONE,         /* no further processing */
  39         EMULATE_DO_MMIO,      /* kvm_run filled with MMIO request */
  40         EMULATE_DO_DCR,       /* kvm_run filled with DCR request */
  41         EMULATE_FAIL,         /* can't emulate this instruction */
  42 };
  43
  44 extern const unsigned char exception_priority[];
  45 extern const unsigned char priority_exception[];
  46
  47 extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
  48 extern char kvmppc_handlers_start[];
  49 extern unsigned long kvmppc_handler_len;
  50
  51 extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
  52 extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
  53                               unsigned int rt, unsigned int bytes,
  54                               int is_bigendian);
  55 extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
  56                                u32 val, unsigned int bytes, int is_bigendian);
  57
  58 extern int kvmppc_emulate_instruction(struct kvm_run *run,
  59                                       struct kvm_vcpu *vcpu);
  60 extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
  61
  62 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
  63                            u64 asid, u32 flags);
  64 extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
  65                                   gva_t eend, u32 asid);
  66 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
  67 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
  68
  69 /* XXX Book E specific */
  70 extern void kvmppc_tlbe_set_modified(struct kvm_vcpu *vcpu, unsigned int i);
  71
  72 extern void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu);
  73
  74 static inline void kvmppc_queue_exception(struct kvm_vcpu *vcpu, int exception)
  75 {
  76         unsigned int priority = exception_priority[exception];
  77         set_bit(priority, &vcpu->arch.pending_exceptions);
  78 }
  79
  80 static inline void kvmppc_clear_exception(struct kvm_vcpu *vcpu, int exception)
  81 {
  82         unsigned int priority = exception_priority[exception];
  83         clear_bit(priority, &vcpu->arch.pending_exceptions);
  84 }
  85
  86 /* Helper function for "full" MSR writes. No need to call this if only EE is
  87  * changing. */
  88 static inline void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
  89 {
  90         if ((new_msr & MSR_PR) != (vcpu->arch.msr & MSR_PR))
  91                 kvmppc_mmu_priv_switch(vcpu, new_msr & MSR_PR);
  92
  93         vcpu->arch.msr = new_msr;
  94
  95         if (vcpu->arch.msr & MSR_WE)
  96                 kvm_vcpu_block(vcpu);
  97 }
  98
  99 static inline void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 new_pid)
 100 {
 101         if (vcpu->arch.pid != new_pid) {
 102                 vcpu->arch.pid = new_pid;
 103                 vcpu->arch.swap_pid = 1;
 104         }
 105 }
 106
 107 #endif /* __POWERPC_KVM_PPC_H__ */