arch/arm/include/asm/kvm_hyp.h

   1 /*
   2  * Copyright (C) 2015 - ARM Ltd
   3  * Author: Marc Zyngier <marc.zyngier@arm.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __ARM_KVM_HYP_H__
  19 #define __ARM_KVM_HYP_H__
  20
  21 #include <linux/compiler.h>
  22 #include <linux/kvm_host.h>
  23 #include <asm/cp15.h>
  24 #include <asm/kvm_mmu.h>
  25 #include <asm/vfp.h>
  26
  27 #define __hyp_text __section(.hyp.text) notrace
  28
  29 #define __ACCESS_VFP(CRn)                       \
  30         "mrc", "mcr", __stringify(p10, 7, %0, CRn, cr0, 0), u32
  31
  32 #define write_special(v, r)                                     \
  33         asm volatile("msr " __stringify(r) ", %0" : : "r" (v))
  34 #define read_special(r) ({                                      \
  35         u32 __val;                                              \
  36         asm volatile("mrs %0, " __stringify(r) : "=r" (__val)); \
  37         __val;                                                  \
  38 })
  39
  40 #define TTBR0           __ACCESS_CP15_64(0, c2)
  41 #define TTBR1           __ACCESS_CP15_64(1, c2)
  42 #define VTTBR           __ACCESS_CP15_64(6, c2)
  43 #define PAR             __ACCESS_CP15_64(0, c7)
  44 #define CNTV_CVAL       __ACCESS_CP15_64(3, c14)
  45 #define CNTVOFF         __ACCESS_CP15_64(4, c14)
  46
  47 #define MIDR            __ACCESS_CP15(c0, 0, c0, 0)
  48 #define CSSELR          __ACCESS_CP15(c0, 2, c0, 0)
  49 #define VPIDR           __ACCESS_CP15(c0, 4, c0, 0)
  50 #define VMPIDR          __ACCESS_CP15(c0, 4, c0, 5)
  51 #define SCTLR           __ACCESS_CP15(c1, 0, c0, 0)
  52 #define CPACR           __ACCESS_CP15(c1, 0, c0, 2)
  53 #define HCR             __ACCESS_CP15(c1, 4, c1, 0)
  54 #define HDCR            __ACCESS_CP15(c1, 4, c1, 1)
  55 #define HCPTR           __ACCESS_CP15(c1, 4, c1, 2)
  56 #define HSTR            __ACCESS_CP15(c1, 4, c1, 3)
  57 #define TTBCR           __ACCESS_CP15(c2, 0, c0, 2)
  58 #define HTCR            __ACCESS_CP15(c2, 4, c0, 2)
  59 #define VTCR            __ACCESS_CP15(c2, 4, c1, 2)
  60 #define DACR            __ACCESS_CP15(c3, 0, c0, 0)
  61 #define DFSR            __ACCESS_CP15(c5, 0, c0, 0)
  62 #define IFSR            __ACCESS_CP15(c5, 0, c0, 1)
  63 #define ADFSR           __ACCESS_CP15(c5, 0, c1, 0)
  64 #define AIFSR           __ACCESS_CP15(c5, 0, c1, 1)
  65 #define HSR             __ACCESS_CP15(c5, 4, c2, 0)
  66 #define DFAR            __ACCESS_CP15(c6, 0, c0, 0)
  67 #define IFAR            __ACCESS_CP15(c6, 0, c0, 2)
  68 #define HDFAR           __ACCESS_CP15(c6, 4, c0, 0)
  69 #define HIFAR           __ACCESS_CP15(c6, 4, c0, 2)
  70 #define HPFAR           __ACCESS_CP15(c6, 4, c0, 4)
  71 #define ICIALLUIS       __ACCESS_CP15(c7, 0, c1, 0)
  72 #define ATS1CPR         __ACCESS_CP15(c7, 0, c8, 0)
  73 #define TLBIALLIS       __ACCESS_CP15(c8, 0, c3, 0)
  74 #define TLBIALL         __ACCESS_CP15(c8, 0, c7, 0)
  75 #define TLBIALLNSNHIS   __ACCESS_CP15(c8, 4, c3, 4)
  76 #define PRRR            __ACCESS_CP15(c10, 0, c2, 0)
  77 #define NMRR            __ACCESS_CP15(c10, 0, c2, 1)
  78 #define AMAIR0          __ACCESS_CP15(c10, 0, c3, 0)
  79 #define AMAIR1          __ACCESS_CP15(c10, 0, c3, 1)
  80 #define VBAR            __ACCESS_CP15(c12, 0, c0, 0)
  81 #define CID             __ACCESS_CP15(c13, 0, c0, 1)
  82 #define TID_URW         __ACCESS_CP15(c13, 0, c0, 2)
  83 #define TID_URO         __ACCESS_CP15(c13, 0, c0, 3)
  84 #define TID_PRIV        __ACCESS_CP15(c13, 0, c0, 4)
  85 #define HTPIDR          __ACCESS_CP15(c13, 4, c0, 2)
  86 #define CNTKCTL         __ACCESS_CP15(c14, 0, c1, 0)
  87 #define CNTV_CTL        __ACCESS_CP15(c14, 0, c3, 1)
  88 #define CNTHCTL         __ACCESS_CP15(c14, 4, c1, 0)
  89
  90 #define VFP_FPEXC       __ACCESS_VFP(FPEXC)
  91
  92 /* AArch64 compatibility macros, only for the timer so far */
  93 #define read_sysreg_el0(r)              read_sysreg(r##_el0)
  94 #define write_sysreg_el0(v, r)          write_sysreg(v, r##_el0)
  95
  96 #define cntv_ctl_el0                    CNTV_CTL
  97 #define cntv_cval_el0                   CNTV_CVAL
  98 #define cntvoff_el2                     CNTVOFF
  99 #define cnthctl_el2                     CNTHCTL
 100
 101 void __timer_save_state(struct kvm_vcpu *vcpu);
 102 void __timer_restore_state(struct kvm_vcpu *vcpu);
 103
 104 void __vgic_v2_save_state(struct kvm_vcpu *vcpu);
 105 void __vgic_v2_restore_state(struct kvm_vcpu *vcpu);
 106
 107 void __sysreg_save_state(struct kvm_cpu_context *ctxt);
 108 void __sysreg_restore_state(struct kvm_cpu_context *ctxt);
 109
 110 void __vgic_v3_save_state(struct kvm_vcpu *vcpu);
 111 void __vgic_v3_restore_state(struct kvm_vcpu *vcpu);
 112
 113 void asmlinkage __vfp_save_state(struct vfp_hard_struct *vfp);
 114 void asmlinkage __vfp_restore_state(struct vfp_hard_struct *vfp);
 115 static inline bool __vfp_enabled(void)
 116 {
 117         return !(read_sysreg(HCPTR) & (HCPTR_TCP(11) | HCPTR_TCP(10)));
 118 }
 119
 120 void __hyp_text __banked_save_state(struct kvm_cpu_context *ctxt);
 121 void __hyp_text __banked_restore_state(struct kvm_cpu_context *ctxt);
 122
 123 int asmlinkage __guest_enter(struct kvm_vcpu *vcpu,
 124                              struct kvm_cpu_context *host);
 125 int asmlinkage __hyp_do_panic(const char *, int, u32);
 126
 127 #endif /* __ARM_KVM_HYP_H__ */