LXR linux/arch/arm64/include/asm/kvm

   1/*
   2 * Copyright (C) 2012,2013 - 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_ASM_H__
  19#define __ARM_KVM_ASM_H__
  20
  21#include <asm/virt.h>
  22
  23#define ARM_EXIT_WITH_SERROR_BIT  31
  24#define ARM_EXCEPTION_CODE(x)     ((x) & ~(1U << ARM_EXIT_WITH_SERROR_BIT))
  25#define ARM_SERROR_PENDING(x)     !!((x) & (1U << ARM_EXIT_WITH_SERROR_BIT))
  26
  27#define ARM_EXCEPTION_IRQ         0
  28#define ARM_EXCEPTION_EL1_SERROR  1
  29#define ARM_EXCEPTION_TRAP        2
  30/* The hyp-stub will return this for any kvm_call_hyp() call */
  31#define ARM_EXCEPTION_HYP_GONE    HVC_STUB_ERR
  32
  33#define KVM_ARM64_DEBUG_DIRTY_SHIFT     0
  34#define KVM_ARM64_DEBUG_DIRTY           (1 << KVM_ARM64_DEBUG_DIRTY_SHIFT)
  35
  36/* Translate a kernel address of @sym into its equivalent linear mapping */
  37#define kvm_ksym_ref(sym)                                               \
  38        ({                                                              \
  39                void *val = &sym;                                       \
  40                if (!is_kernel_in_hyp_mode())                           \
  41                        val = phys_to_virt((u64)&sym - kimage_voffset); \
  42                val;                                                    \
  43         })
  44
  45#ifndef __ASSEMBLY__
  46struct kvm;
  47struct kvm_vcpu;
  48
  49extern char __kvm_hyp_init[];
  50extern char __kvm_hyp_init_end[];
  51
  52extern char __kvm_hyp_vector[];
  53
  54extern void __kvm_flush_vm_context(void);
  55extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
  56extern void __kvm_tlb_flush_vmid(struct kvm *kvm);
  57extern void __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu);
  58
  59extern void __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high);
  60
  61extern int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu);
  62
  63extern int __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu);
  64
  65extern u64 __vgic_v3_get_ich_vtr_el2(void);
  66extern u64 __vgic_v3_read_vmcr(void);
  67extern void __vgic_v3_write_vmcr(u32 vmcr);
  68extern void __vgic_v3_init_lrs(void);
  69
  70extern u32 __kvm_get_mdcr_el2(void);
  71
  72extern u32 __init_stage2_translation(void);
  73
  74#else /* __ASSEMBLY__ */
  75
  76.macro get_host_ctxt reg, tmp
  77        adr_l   \reg, kvm_host_cpu_state
  78        mrs     \tmp, tpidr_el2
  79        add     \reg, \reg, \tmp
  80.endm
  81
  82.macro get_vcpu_ptr vcpu, ctxt
  83        get_host_ctxt \ctxt, \vcpu
  84        ldr     \vcpu, [\ctxt, #HOST_CONTEXT_VCPU]
  85        kern_hyp_va     \vcpu
  86.endm
  87
  88#endif
  89
  90#endif /* __ARM_KVM_ASM_H__ */
  91