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

 /*
  * 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, 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>

 #define __KVM_HAVE_ARCH_INTC_INITIALIZED

 #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 <kvm/arm_vgic.h>

 #define KVM_MAX_VCPUS VGIC_V2_MAX_CPUS

 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;

 	/* 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;
 	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 */
 	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.
 	 */

 	/* 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_successful_poll;
 	u32 halt_attempted_poll;
 	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);
 u64 kvm_call_hyp(void *hypfn, ...);
 void force_vm_exit(const cpumask_t *mask);

 #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);

 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);

 /* We do not have shadow page tables, hence the empty hooks */
 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);

 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 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;
 }

 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_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) {}

 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) {}

 #endif /* __ARM_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, 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>

	#define __KVM_HAVE_ARCH_INTC_INITIALIZED

	#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 <kvm/arm_vgic.h>

	#define KVM_MAX_VCPUS VGIC_V2_MAX_CPUS

	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;

	/* 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;
	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 */
	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.
	*/

	/* 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_successful_poll;
	u32 halt_attempted_poll;
	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);
	u64 kvm_call_hyp(void *hypfn, ...);
	void force_vm_exit(const cpumask_t *mask);

	#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);

	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);

	/* We do not have shadow page tables, hence the empty hooks */
	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);

	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 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;
	}

	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_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) {}

	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) {}

	#endif /* __ARM_KVM_HOST_H__ */