/* * Copyright (C) 2012,2013 - ARM Ltd * Author: Marc Zyngier <marc.zyngier@arm.com> * * Derived from arch/arm/include/asm/kvm_host.h: * Copyright (C) 2012 - Virtual Open Systems and Columbia University * Author: Christoffer Dall <c.dall@virtualopensystems.com> * * 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, see <http://www.gnu.org/licenses/>. */ #ifndef __ARM64_KVM_HOST_H__ #define __ARM64_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> #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 #include <kvm/arm_vgic.h> #include <kvm/arm_arch_timer.h> #define KVM_VCPU_MAX_FEATURES 3 int __attribute_const__ kvm_target_cpu(void); int kvm_reset_vcpu(struct kvm_vcpu *vcpu); int kvm_arch_dev_ioctl_check_extension(long ext); struct kvm_arch { /* The VMID generation used for the virt. memory system */ u64 vmid_gen; u32 vmid; /* 1-level 2nd stage table and lock */ spinlock_t pgd_lock; pgd_t *pgd; /* VTTBR value associated with above pgd and vmid */ u64 vttbr; /* Interrupt controller */ struct vgic_dist vgic; /* Timer */ struct arch_timer_kvm timer; }; #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 esr_el2; /* Hyp Syndrom Register */ u64 far_el2; /* Hyp Fault Address Register */ u64 hpfar_el2; /* Hyp IPA Fault Address Register */ }; struct kvm_cpu_context { struct kvm_regs gp_regs; union { u64 sys_regs[NR_SYS_REGS]; u32 copro[NR_COPRO_REGS]; }; }; typedef struct kvm_cpu_context kvm_cpu_context_t; struct kvm_vcpu_arch { struct kvm_cpu_context ctxt; /* HYP configuration */ u64 hcr_el2; /* Exception Information */ struct kvm_vcpu_fault_info fault; /* Debug state */ u64 debug_flags; /* Pointer to host CPU 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 */ bool pause; /* IO related fields */ struct kvm_decode mmio_decode; /* Interrupt related fields */ u64 irq_lines; /* IRQ and FIQ levels */ /* Cache some mmu pages needed inside spinlock regions */ struct kvm_mmu_memory_cache mmu_page_cache; /* Target CPU and feature flags */ int target; DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); /* Detect first run of a vcpu */ bool has_run_once; }; #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) /* * CP14 and CP15 live in the same array, as they are backed by the * same system registers. */ #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) #ifdef CONFIG_CPU_BIG_ENDIAN #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) #else #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) #endif struct kvm_vm_stat { u32 remote_tlb_flush; }; struct kvm_vcpu_stat { u32 halt_wakeup; }; 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); 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); #define KVM_ARCH_WANT_MMU_NOTIFIER 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); /* We do not have shadow page tables, hence the empty hooks */ static inline int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end) { return 0; } static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) { return 0; } static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, unsigned long address) { } struct kvm_vcpu *kvm_arm_get_running_vcpu(void); struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); u64 kvm_call_hyp(void *hypfn, ...); int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, int exception_index); int kvm_perf_init(void); int kvm_perf_teardown(void); 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. */ kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr); } struct vgic_sr_vectors { void *save_vgic; void *restore_vgic; }; static inline void vgic_arch_setup(const struct vgic_params *vgic) { extern struct vgic_sr_vectors __vgic_sr_vectors; switch(vgic->type) { case VGIC_V2: __vgic_sr_vectors.save_vgic = __save_vgic_v2_state; __vgic_sr_vectors.restore_vgic = __restore_vgic_v2_state; break; #ifdef CONFIG_ARM_GIC_V3 case VGIC_V3: __vgic_sr_vectors.save_vgic = __save_vgic_v3_state; __vgic_sr_vectors.restore_vgic = __restore_vgic_v3_state; break; #endif default: BUG(); } } static inline void kvm_arch_hardware_disable(void) {} 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) {} #endif /* __ARM64_KVM_HOST_H__ */