2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2, as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 #ifndef __ARM_KVM_HOST_H__
20 #define __ARM_KVM_HOST_H__
23 #include <asm/kvm_asm.h>
24 #include <asm/kvm_mmio.h>
25 #include <asm/fpstate.h>
26 #include <asm/kvm_arch_timer.h>
28 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
29 #define KVM_USER_MEM_SLOTS 32
30 #define KVM_PRIVATE_MEM_SLOTS 4
31 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
32 #define KVM_HAVE_ONE_REG
34 #define KVM_VCPU_MAX_FEATURES 1
36 /* We don't currently support large pages. */
37 #define KVM_HPAGE_GFN_SHIFT(x) 0
38 #define KVM_NR_PAGE_SIZES 1
39 #define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
41 #include <asm/kvm_vgic.h>
44 u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
45 int kvm_target_cpu(void);
46 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
47 void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
50 /* VTTBR value associated with below pgd and vmid */
54 struct arch_timer_kvm timer;
57 * Anything that is not used directly from assembly code goes
61 /* The VMID generation used for the virt. memory system */
65 /* Stage-2 page table */
68 /* Interrupt controller */
69 struct vgic_dist vgic;
72 #define KVM_NR_MEM_OBJS 40
75 * We don't want allocation failures within the mmu code, so we preallocate
76 * enough memory for a single page fault in a cache.
78 struct kvm_mmu_memory_cache {
80 void *objects[KVM_NR_MEM_OBJS];
83 struct kvm_vcpu_fault_info {
84 u32 hsr; /* Hyp Syndrome Register */
85 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
86 u32 hpfar; /* Hyp IPA Fault Address Register */
87 u32 hyp_pc; /* PC when exception was taken from Hyp mode */
90 typedef struct vfp_hard_struct kvm_kernel_vfp_t;
92 struct kvm_vcpu_arch {
95 int target; /* Processor target */
96 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
98 /* System control coprocessor (cp15) */
99 u32 cp15[NR_CP15_REGS];
101 /* The CPU type we expose to the VM */
104 /* Exception Information */
105 struct kvm_vcpu_fault_info fault;
107 /* Floating point registers (VFP and Advanced SIMD/NEON) */
108 kvm_kernel_vfp_t vfp_guest;
109 kvm_kernel_vfp_t *vfp_host;
112 struct vgic_cpu vgic_cpu;
113 struct arch_timer_cpu timer_cpu;
116 * Anything that is not used directly from assembly code goes
119 /* dcache set/way operation pending */
121 cpumask_t require_dcache_flush;
123 /* Don't run the guest on this vcpu */
126 /* IO related fields */
127 struct kvm_decode mmio_decode;
129 /* Interrupt related fields */
130 u32 irq_lines; /* IRQ and FIQ levels */
132 /* Cache some mmu pages needed inside spinlock regions */
133 struct kvm_mmu_memory_cache mmu_page_cache;
135 /* Detect first run of a vcpu */
140 u32 remote_tlb_flush;
143 struct kvm_vcpu_stat {
147 struct kvm_vcpu_init;
148 int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
149 const struct kvm_vcpu_init *init);
150 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
151 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
153 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
154 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
155 u64 kvm_call_hyp(void *hypfn, ...);
156 void force_vm_exit(const cpumask_t *mask);
158 #define KVM_ARCH_WANT_MMU_NOTIFIER
160 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
161 int kvm_unmap_hva_range(struct kvm *kvm,
162 unsigned long start, unsigned long end);
163 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
165 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
166 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
168 /* We do not have shadow page tables, hence the empty hooks */
169 static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
174 static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
179 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
180 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
182 int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
183 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
185 int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
186 int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
188 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
189 int exception_index);
191 static inline void __cpu_init_hyp_mode(unsigned long long boot_pgd_ptr,
192 unsigned long long pgd_ptr,
193 unsigned long hyp_stack_ptr,
194 unsigned long vector_ptr)
197 * Call initialization code, and switch to the full blown HYP
198 * code. The init code doesn't need to preserve these
199 * registers as r0-r3 are already callee saved according to
201 * Note that we slightly misuse the prototype by casing the
202 * stack pointer to a void *.
204 * We don't have enough registers to perform the full init in
205 * one go. Install the boot PGD first, and then install the
206 * runtime PGD, stack pointer and vectors. The PGDs are always
207 * passed as the third argument, in order to be passed into
208 * r2-r3 to the init code (yes, this is compliant with the
212 kvm_call_hyp(NULL, 0, boot_pgd_ptr);
214 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
217 static inline int kvm_arch_dev_ioctl_check_extension(long ext)
222 int kvm_perf_init(void);
223 int kvm_perf_teardown(void);
225 #endif /* __ARM_KVM_HOST_H__ */