/* * 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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 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 #include #include #include #include #if defined(CONFIG_KVM_ARM_MAX_VCPUS) #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS #else #define KVM_MAX_VCPUS 0 #endif #define KVM_USER_MEM_SLOTS 32 #define KVM_PRIVATE_MEM_SLOTS 4 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 #define KVM_HAVE_ONE_REG #define KVM_VCPU_MAX_FEATURES 2 #include struct kvm_vcpu; u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode); int 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; /* Timer */ struct arch_timer_kvm timer; /* * 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; }; #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 */ u32 hyp_pc; /* PC when exception was taken from Hyp mode */ }; typedef struct vfp_hard_struct kvm_cpu_context_t; struct kvm_vcpu_arch { struct kvm_regs regs; int target; /* Processor target */ DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); /* System control coprocessor (cp15) */ u32 cp15[NR_CP15_REGS]; /* 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; /* Floating point registers (VFP and Advanced SIMD/NEON) */ struct vfp_hard_struct vfp_guest; /* 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. */ /* dcache set/way operation pending */ int last_pcpu; cpumask_t require_dcache_flush; /* Don't run the guest on this vcpu */ 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 { u32 remote_tlb_flush; }; struct kvm_vcpu_stat { u32 halt_wakeup; }; struct kvm_vcpu_init; int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, const struct kvm_vcpu_init *init); 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); struct kvm_one_reg; 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); u64 kvm_call_hyp(void *hypfn, ...); void force_vm_exit(const cpumask_t *mask); #define KVM_ARCH_WANT_MMU_NOTIFIER struct kvm; 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); /* We do not have shadow page tables, hence the empty hooks */ static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) { return 0; } static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) { return 0; } struct kvm_vcpu *kvm_arm_get_running_vcpu(void); struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu); struct kvm_one_reg; 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 boot_pgd_ptr, 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 casing the * stack pointer to a void *. * * We don't have enough registers to perform the full init in * one go. Install the boot PGD first, and then install the * runtime PGD, stack pointer and vectors. 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(NULL, 0, boot_pgd_ptr); kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr); } static inline int kvm_arch_dev_ioctl_check_extension(long ext) { return 0; } static inline void vgic_arch_setup(const struct vgic_params *vgic) { BUG_ON(vgic->type != VGIC_V2); } int kvm_perf_init(void); int kvm_perf_teardown(void); #endif /* __ARM_KVM_HOST_H__ */