arch/powerpc/kvm/booke.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 __KVM_BOOKE_H__
  21 #define __KVM_BOOKE_H__
  22
  23 #include <linux/types.h>
  24 #include <linux/kvm_host.h>
  25 #include <asm/kvm_ppc.h>
  26 #include <asm/switch_to.h>
  27 #include "timing.h"
  28
  29 /* interrupt priortity ordering */
  30 #define BOOKE_IRQPRIO_DATA_STORAGE 0
  31 #define BOOKE_IRQPRIO_INST_STORAGE 1
  32 #define BOOKE_IRQPRIO_ALIGNMENT 2
  33 #define BOOKE_IRQPRIO_PROGRAM 3
  34 #define BOOKE_IRQPRIO_FP_UNAVAIL 4
  35 #define BOOKE_IRQPRIO_SPE_UNAVAIL 5
  36 #define BOOKE_IRQPRIO_SPE_FP_DATA 6
  37 #define BOOKE_IRQPRIO_SPE_FP_ROUND 7
  38 #define BOOKE_IRQPRIO_SYSCALL 8
  39 #define BOOKE_IRQPRIO_AP_UNAVAIL 9
  40 #define BOOKE_IRQPRIO_DTLB_MISS 10
  41 #define BOOKE_IRQPRIO_ITLB_MISS 11
  42 #define BOOKE_IRQPRIO_MACHINE_CHECK 12
  43 #define BOOKE_IRQPRIO_DEBUG 13
  44 #define BOOKE_IRQPRIO_CRITICAL 14
  45 #define BOOKE_IRQPRIO_WATCHDOG 15
  46 #define BOOKE_IRQPRIO_EXTERNAL 16
  47 #define BOOKE_IRQPRIO_FIT 17
  48 #define BOOKE_IRQPRIO_DECREMENTER 18
  49 #define BOOKE_IRQPRIO_PERFORMANCE_MONITOR 19
  50 /* Internal pseudo-irqprio for level triggered externals */
  51 #define BOOKE_IRQPRIO_EXTERNAL_LEVEL 20
  52 #define BOOKE_IRQPRIO_DBELL 21
  53 #define BOOKE_IRQPRIO_DBELL_CRIT 22
  54 #define BOOKE_IRQPRIO_MAX 23
  55
  56 #define BOOKE_IRQMASK_EE ((1 << BOOKE_IRQPRIO_EXTERNAL_LEVEL) | \
  57                           (1 << BOOKE_IRQPRIO_PERFORMANCE_MONITOR) | \
  58                           (1 << BOOKE_IRQPRIO_DBELL) | \
  59                           (1 << BOOKE_IRQPRIO_DECREMENTER) | \
  60                           (1 << BOOKE_IRQPRIO_FIT) | \
  61                           (1 << BOOKE_IRQPRIO_EXTERNAL))
  62
  63 #define BOOKE_IRQMASK_CE ((1 << BOOKE_IRQPRIO_DBELL_CRIT) | \
  64                           (1 << BOOKE_IRQPRIO_WATCHDOG) | \
  65                           (1 << BOOKE_IRQPRIO_CRITICAL))
  66
  67 extern unsigned long kvmppc_booke_handlers;
  68
  69 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr);
  70 void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr);
  71
  72 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr);
  73 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr);
  74 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
  75 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
  76
  77 int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
  78                             unsigned int inst, int *advance);
  79 int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
  80 int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
  81
  82 /* low-level asm code to transfer guest state */
  83 void kvmppc_load_guest_spe(struct kvm_vcpu *vcpu);
  84 void kvmppc_save_guest_spe(struct kvm_vcpu *vcpu);
  85
  86 /* high-level function, manages flags, host state */
  87 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu);
  88
  89 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
  90 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu);
  91
  92 enum int_class {
  93         INT_CLASS_NONCRIT,
  94         INT_CLASS_CRIT,
  95         INT_CLASS_MC,
  96         INT_CLASS_DBG,
  97 };
  98
  99 void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type);
 100
 101 /*
 102  * Load up guest vcpu FP state if it's needed.
 103  * It also set the MSR_FP in thread so that host know
 104  * we're holding FPU, and then host can help to save
 105  * guest vcpu FP state if other threads require to use FPU.
 106  * This simulates an FP unavailable fault.
 107  *
 108  * It requires to be called with preemption disabled.
 109  */
 110 static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
 111 {
 112 #ifdef CONFIG_PPC_FPU
 113         if (vcpu->fpu_active && !(current->thread.regs->msr & MSR_FP)) {
 114                 load_up_fpu();
 115                 current->thread.regs->msr |= MSR_FP;
 116         }
 117 #endif
 118 }
 119
 120 /*
 121  * Save guest vcpu FP state into thread.
 122  * It requires to be called with preemption disabled.
 123  */
 124 static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
 125 {
 126 #ifdef CONFIG_PPC_FPU
 127         if (vcpu->fpu_active && (current->thread.regs->msr & MSR_FP))
 128                 giveup_fpu(current);
 129 #endif
 130 }
 131 #endif /* __KVM_BOOKE_H__ */