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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
* Author: Christoffer Dall <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#ifndef __ARM_KVM_HOST_H__
#define __ARM_KVM_HOST_H__
#include <linux/types.h>
#include <linux/kvm_types.h>
#include <asm/kvm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
#include <asm/fpstate.h>
#include <kvm/arm_arch_timer.h>
#include <kvm/arm_vgic.h>
#define KVM_REQ_SLEEP \
u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
int __attribute_const__ kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
struct kvm_arch {
/* VTTBR value associated with below pgd and vmid */
u64 vttbr;
/* The last vcpu id that ran on each physical CPU */
int __percpu *last_vcpu_ran;
* Anything that is not used directly from assembly code goes
* here.
/* The VMID generation used for the virt. memory system */
u64 vmid_gen;
u32 vmid;
/* Stage-2 page table */
pgd_t *pgd;
/* Interrupt controller */
struct vgic_dist vgic;
int max_vcpus;
#define KVM_NR_MEM_OBJS 40
* We don't want allocation failures within the mmu code, so we preallocate
* enough memory for a single page fault in a cache.
struct kvm_mmu_memory_cache {
int nobjs;
void *objects[KVM_NR_MEM_OBJS];
struct kvm_vcpu_fault_info {
u32 hsr; /* Hyp Syndrome Register */
u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
u32 hpfar; /* Hyp IPA Fault Address Register */
* 0 is reserved as an invalid value.
* Order should be kept in sync with the save/restore code.
enum vcpu_sysreg {
c0_MPIDR, /* MultiProcessor ID Register */
c0_CSSELR, /* Cache Size Selection Register */
c1_SCTLR, /* System Control Register */
c1_ACTLR, /* Auxiliary Control Register */
c1_CPACR, /* Coprocessor Access Control */
c2_TTBR0, /* Translation Table Base Register 0 */
c2_TTBR0_high, /* TTBR0 top 32 bits */
c2_TTBR1, /* Translation Table Base Register 1 */
c2_TTBR1_high, /* TTBR1 top 32 bits */
c2_TTBCR, /* Translation Table Base Control R. */
c3_DACR, /* Domain Access Control Register */
c5_DFSR, /* Data Fault Status Register */
c5_IFSR, /* Instruction Fault Status Register */
c5_ADFSR, /* Auxilary Data Fault Status R */
c5_AIFSR, /* Auxilary Instrunction Fault Status R */
c6_DFAR, /* Data Fault Address Register */
c6_IFAR, /* Instruction Fault Address Register */
c7_PAR, /* Physical Address Register */
c7_PAR_high, /* PAR top 32 bits */
c9_L2CTLR, /* Cortex A15/A7 L2 Control Register */
c10_PRRR, /* Primary Region Remap Register */
c10_NMRR, /* Normal Memory Remap Register */
c12_VBAR, /* Vector Base Address Register */
c13_CID, /* Context ID Register */
c13_TID_URW, /* Thread ID, User R/W */
c13_TID_URO, /* Thread ID, User R/O */
c13_TID_PRIV, /* Thread ID, Privileged */
c14_CNTKCTL, /* Timer Control Register (PL1) */
c10_AMAIR0, /* Auxilary Memory Attribute Indirection Reg0 */
c10_AMAIR1, /* Auxilary Memory Attribute Indirection Reg1 */
NR_CP15_REGS /* Number of regs (incl. invalid) */
struct kvm_cpu_context {
struct kvm_regs gp_regs;
struct vfp_hard_struct vfp;
u32 cp15[NR_CP15_REGS];
typedef struct kvm_cpu_context kvm_cpu_context_t;
struct kvm_vcpu_arch {
struct kvm_cpu_context ctxt;
int target; /* Processor target */
/* The CPU type we expose to the VM */
u32 midr;
/* HYP trapping configuration */
u32 hcr;
/* Interrupt related fields */
u32 irq_lines; /* IRQ and FIQ levels */
/* Exception Information */
struct kvm_vcpu_fault_info fault;
/* Host FP context */
kvm_cpu_context_t *host_cpu_context;
/* VGIC state */
struct vgic_cpu vgic_cpu;
struct arch_timer_cpu timer_cpu;
* Anything that is not used directly from assembly code goes
* here.
/* vcpu power-off state */
bool power_off;
/* Don't run the guest (internal implementation need) */
bool pause;
/* IO related fields */
struct kvm_decode mmio_decode;
/* Cache some mmu pages needed inside spinlock regions */
struct kvm_mmu_memory_cache mmu_page_cache;
/* Detect first run of a vcpu */
bool has_run_once;
struct kvm_vm_stat {
ulong remote_tlb_flush;
struct kvm_vcpu_stat {
u64 halt_successful_poll;
u64 halt_attempted_poll;
u64 halt_poll_invalid;
u64 halt_wakeup;
u64 hvc_exit_stat;
u64 wfe_exit_stat;
u64 wfi_exit_stat;
u64 mmio_exit_user;
u64 mmio_exit_kernel;
u64 exits;
#define vcpu_cp15(v,r) (v)->arch.ctxt.cp15[r]
int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
unsigned long kvm_call_hyp(void *hypfn, ...);
void force_vm_exit(const cpumask_t *mask);
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
int kvm_unmap_hva_range(struct kvm *kvm,
unsigned long start, unsigned long end);
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
void kvm_arm_halt_guest(struct kvm *kvm);
void kvm_arm_resume_guest(struct kvm *kvm);
int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
int exception_index);
static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
unsigned long hyp_stack_ptr,
unsigned long vector_ptr)
* Call initialization code, and switch to the full blown HYP
* code. The init code doesn't need to preserve these
* registers as r0-r3 are already callee saved according to
* the AAPCS.
* Note that we slightly misuse the prototype by casting the
* stack pointer to a void *.
* The PGDs are always passed as the third argument, in order
* to be passed into r2-r3 to the init code (yes, this is
* compliant with the PCS!).
kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
static inline void __cpu_init_stage2(void)
static inline int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
return 0;
int kvm_perf_init(void);
int kvm_perf_teardown(void);
void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
static inline void kvm_arch_hardware_unsetup(void) {}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
static inline void kvm_arm_init_debug(void) {}
static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {}
static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {}
int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr);
int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr);
int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr);
#endif /* __ARM_KVM_HOST_H__ */