arch/arm64/include/asm/kvm_host.h - kernel/msm-4.9 - Gitiles

 /*
  * 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_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, ...);
 void force_vm_exit(const cpumask_t *mask);

 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__ */
	/*
	* 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_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, ...);
	void force_vm_exit(const cpumask_t *mask);

	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__ */