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authorMarc Zyngier <marc.zyngier@arm.com>2012-12-10 11:29:28 -0500
committerMarc Zyngier <marc.zyngier@arm.com>2013-06-07 09:03:38 -0400
commit4f8d6632ec71372a3b8dbb4775662c2c9025d173 (patch)
tree247916133a070e059a9075f9bcb38133ffdd71e8 /arch
parentf4672752c321ea36ce099cebdd7a082a8f327505 (diff)
arm64: KVM: kvm_arch and kvm_vcpu_arch definitions
Provide the architecture dependent structures for VM and vcpu abstractions. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/include/asm/kvm_host.h186
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
new file mode 100644
index 000000000000..4a2622f5e81f
--- /dev/null
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -0,0 +1,186 @@
1/*
2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
4 *
5 * Derived from arch/arm/include/asm/kvm_host.h:
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#ifndef __ARM64_KVM_HOST_H__
23#define __ARM64_KVM_HOST_H__
24
25#include <asm/kvm.h>
26#include <asm/kvm_asm.h>
27#include <asm/kvm_mmio.h>
28
29#define KVM_MAX_VCPUS 4
30#define KVM_USER_MEM_SLOTS 32
31#define KVM_PRIVATE_MEM_SLOTS 4
32#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
33
34#include <kvm/arm_vgic.h>
35#include <kvm/arm_arch_timer.h>
36
37#define KVM_VCPU_MAX_FEATURES 0
38
39/* We don't currently support large pages. */
40#define KVM_HPAGE_GFN_SHIFT(x) 0
41#define KVM_NR_PAGE_SIZES 1
42#define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
43
44struct kvm_vcpu;
45int kvm_target_cpu(void);
46int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
47int kvm_arch_dev_ioctl_check_extension(long ext);
48
49struct kvm_arch {
50 /* The VMID generation used for the virt. memory system */
51 u64 vmid_gen;
52 u32 vmid;
53
54 /* 1-level 2nd stage table and lock */
55 spinlock_t pgd_lock;
56 pgd_t *pgd;
57
58 /* VTTBR value associated with above pgd and vmid */
59 u64 vttbr;
60
61 /* Interrupt controller */
62 struct vgic_dist vgic;
63
64 /* Timer */
65 struct arch_timer_kvm timer;
66};
67
68#define KVM_NR_MEM_OBJS 40
69
70/*
71 * We don't want allocation failures within the mmu code, so we preallocate
72 * enough memory for a single page fault in a cache.
73 */
74struct kvm_mmu_memory_cache {
75 int nobjs;
76 void *objects[KVM_NR_MEM_OBJS];
77};
78
79struct kvm_vcpu_fault_info {
80 u32 esr_el2; /* Hyp Syndrom Register */
81 u64 far_el2; /* Hyp Fault Address Register */
82 u64 hpfar_el2; /* Hyp IPA Fault Address Register */
83};
84
85struct kvm_cpu_context {
86 struct kvm_regs gp_regs;
87 u64 sys_regs[NR_SYS_REGS];
88};
89
90typedef struct kvm_cpu_context kvm_cpu_context_t;
91
92struct kvm_vcpu_arch {
93 struct kvm_cpu_context ctxt;
94
95 /* HYP configuration */
96 u64 hcr_el2;
97
98 /* Exception Information */
99 struct kvm_vcpu_fault_info fault;
100
101 /* Pointer to host CPU context */
102 kvm_cpu_context_t *host_cpu_context;
103
104 /* VGIC state */
105 struct vgic_cpu vgic_cpu;
106 struct arch_timer_cpu timer_cpu;
107
108 /*
109 * Anything that is not used directly from assembly code goes
110 * here.
111 */
112 /* dcache set/way operation pending */
113 int last_pcpu;
114 cpumask_t require_dcache_flush;
115
116 /* Don't run the guest */
117 bool pause;
118
119 /* IO related fields */
120 struct kvm_decode mmio_decode;
121
122 /* Interrupt related fields */
123 u64 irq_lines; /* IRQ and FIQ levels */
124
125 /* Cache some mmu pages needed inside spinlock regions */
126 struct kvm_mmu_memory_cache mmu_page_cache;
127
128 /* Target CPU and feature flags */
129 u32 target;
130 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
131
132 /* Detect first run of a vcpu */
133 bool has_run_once;
134};
135
136#define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
137#define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)])
138#define vcpu_cp15(v,r) ((v)->arch.ctxt.cp15[(r)])
139
140struct kvm_vm_stat {
141 u32 remote_tlb_flush;
142};
143
144struct kvm_vcpu_stat {
145 u32 halt_wakeup;
146};
147
148struct kvm_vcpu_init;
149int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
150 const struct kvm_vcpu_init *init);
151unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
152int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
153struct kvm_one_reg;
154int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
155int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
156
157#define KVM_ARCH_WANT_MMU_NOTIFIER
158struct kvm;
159int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
160int kvm_unmap_hva_range(struct kvm *kvm,
161 unsigned long start, unsigned long end);
162void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
163
164/* We do not have shadow page tables, hence the empty hooks */
165static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
166{
167 return 0;
168}
169
170static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
171{
172 return 0;
173}
174
175struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
176struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
177
178u64 kvm_call_hyp(void *hypfn, ...);
179
180int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
181 int exception_index);
182
183int kvm_perf_init(void);
184int kvm_perf_teardown(void);
185
186#endif /* __ARM64_KVM_HOST_H__ */