arm64: KVM: kvm_arch and kvm_vcpu_arch definitions

/*

 * 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 <asm/kvm.h>

#include <asm/kvm_asm.h>

#include <asm/kvm_mmio.h>

#define KVM_MAX_VCPUS 4

#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 0

/* We don't currently support large pages. */

#define KVM_HPAGE_GFN_SHIFT(x)	0

#define KVM_NR_PAGE_SIZES	1

#define KVM_PAGES_PER_HPAGE(x)	(1UL<<31)

struct kvm_vcpu;

int 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;

	u64 sys_regs[NR_SYS_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;

	/* 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 */

	u32 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)])

#define vcpu_cp15(v,r)		((v)->arch.ctxt.cp15[(r)])

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);

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);

#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);

/* 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);

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);

#endif /* __ARM64_KVM_HOST_H__ */