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1 | 05330448 | aliguori | /*
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2 | 05330448 | aliguori | * QEMU KVM support
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3 | 05330448 | aliguori | *
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4 | 05330448 | aliguori | * Copyright IBM, Corp. 2008
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5 | 5832d1f2 | aliguori | * Red Hat, Inc. 2008
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6 | 05330448 | aliguori | *
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7 | 05330448 | aliguori | * Authors:
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8 | 05330448 | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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9 | 5832d1f2 | aliguori | * Glauber Costa <gcosta@redhat.com>
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10 | 05330448 | aliguori | *
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11 | 05330448 | aliguori | * This work is licensed under the terms of the GNU GPL, version 2 or later.
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12 | 05330448 | aliguori | * See the COPYING file in the top-level directory.
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13 | 05330448 | aliguori | *
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14 | 05330448 | aliguori | */
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15 | 05330448 | aliguori | |
16 | 05330448 | aliguori | #include <sys/types.h> |
17 | 05330448 | aliguori | #include <sys/ioctl.h> |
18 | 05330448 | aliguori | #include <sys/mman.h> |
19 | 984b5181 | aliguori | #include <stdarg.h> |
20 | 05330448 | aliguori | |
21 | 05330448 | aliguori | #include <linux/kvm.h> |
22 | 05330448 | aliguori | |
23 | 05330448 | aliguori | #include "qemu-common.h" |
24 | 05330448 | aliguori | #include "sysemu.h" |
25 | e22a25c9 | aliguori | #include "gdbstub.h" |
26 | 05330448 | aliguori | #include "kvm.h" |
27 | 05330448 | aliguori | |
28 | f65ed4c1 | aliguori | /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
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29 | f65ed4c1 | aliguori | #define PAGE_SIZE TARGET_PAGE_SIZE
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30 | f65ed4c1 | aliguori | |
31 | 05330448 | aliguori | //#define DEBUG_KVM
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32 | 05330448 | aliguori | |
33 | 05330448 | aliguori | #ifdef DEBUG_KVM
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34 | 05330448 | aliguori | #define dprintf(fmt, ...) \
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35 | 05330448 | aliguori | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
36 | 05330448 | aliguori | #else
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37 | 05330448 | aliguori | #define dprintf(fmt, ...) \
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38 | 05330448 | aliguori | do { } while (0) |
39 | 05330448 | aliguori | #endif
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40 | 05330448 | aliguori | |
41 | 34fc643f | aliguori | typedef struct KVMSlot |
42 | 34fc643f | aliguori | { |
43 | 34fc643f | aliguori | target_phys_addr_t start_addr; |
44 | 34fc643f | aliguori | ram_addr_t memory_size; |
45 | 34fc643f | aliguori | ram_addr_t phys_offset; |
46 | 34fc643f | aliguori | int slot;
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47 | 34fc643f | aliguori | int flags;
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48 | 34fc643f | aliguori | } KVMSlot; |
49 | 05330448 | aliguori | |
50 | 5832d1f2 | aliguori | typedef struct kvm_dirty_log KVMDirtyLog; |
51 | 5832d1f2 | aliguori | |
52 | 05330448 | aliguori | int kvm_allowed = 0; |
53 | 05330448 | aliguori | |
54 | 05330448 | aliguori | struct KVMState
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55 | 05330448 | aliguori | { |
56 | 05330448 | aliguori | KVMSlot slots[32];
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57 | 05330448 | aliguori | int fd;
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58 | 05330448 | aliguori | int vmfd;
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59 | f65ed4c1 | aliguori | int coalesced_mmio;
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60 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
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61 | e22a25c9 | aliguori | struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
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62 | e22a25c9 | aliguori | #endif
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63 | 05330448 | aliguori | }; |
64 | 05330448 | aliguori | |
65 | 05330448 | aliguori | static KVMState *kvm_state;
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66 | 05330448 | aliguori | |
67 | 05330448 | aliguori | static KVMSlot *kvm_alloc_slot(KVMState *s)
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68 | 05330448 | aliguori | { |
69 | 05330448 | aliguori | int i;
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70 | 05330448 | aliguori | |
71 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
72 | 62d60e8c | aliguori | /* KVM private memory slots */
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73 | 62d60e8c | aliguori | if (i >= 8 && i < 12) |
74 | 62d60e8c | aliguori | continue;
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75 | 05330448 | aliguori | if (s->slots[i].memory_size == 0) |
76 | 05330448 | aliguori | return &s->slots[i];
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77 | 05330448 | aliguori | } |
78 | 05330448 | aliguori | |
79 | d3f8d37f | aliguori | fprintf(stderr, "%s: no free slot available\n", __func__);
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80 | d3f8d37f | aliguori | abort(); |
81 | d3f8d37f | aliguori | } |
82 | d3f8d37f | aliguori | |
83 | d3f8d37f | aliguori | static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
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84 | d3f8d37f | aliguori | target_phys_addr_t start_addr, |
85 | d3f8d37f | aliguori | target_phys_addr_t end_addr) |
86 | d3f8d37f | aliguori | { |
87 | d3f8d37f | aliguori | int i;
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88 | d3f8d37f | aliguori | |
89 | d3f8d37f | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
90 | d3f8d37f | aliguori | KVMSlot *mem = &s->slots[i]; |
91 | d3f8d37f | aliguori | |
92 | d3f8d37f | aliguori | if (start_addr == mem->start_addr &&
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93 | d3f8d37f | aliguori | end_addr == mem->start_addr + mem->memory_size) { |
94 | d3f8d37f | aliguori | return mem;
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95 | d3f8d37f | aliguori | } |
96 | d3f8d37f | aliguori | } |
97 | d3f8d37f | aliguori | |
98 | 05330448 | aliguori | return NULL; |
99 | 05330448 | aliguori | } |
100 | 05330448 | aliguori | |
101 | 6152e2ae | aliguori | /*
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102 | 6152e2ae | aliguori | * Find overlapping slot with lowest start address
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103 | 6152e2ae | aliguori | */
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104 | 6152e2ae | aliguori | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
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105 | 6152e2ae | aliguori | target_phys_addr_t start_addr, |
106 | 6152e2ae | aliguori | target_phys_addr_t end_addr) |
107 | 05330448 | aliguori | { |
108 | 6152e2ae | aliguori | KVMSlot *found = NULL;
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109 | 05330448 | aliguori | int i;
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110 | 05330448 | aliguori | |
111 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
112 | 05330448 | aliguori | KVMSlot *mem = &s->slots[i]; |
113 | 05330448 | aliguori | |
114 | 6152e2ae | aliguori | if (mem->memory_size == 0 || |
115 | 6152e2ae | aliguori | (found && found->start_addr < mem->start_addr)) { |
116 | 6152e2ae | aliguori | continue;
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117 | 6152e2ae | aliguori | } |
118 | 6152e2ae | aliguori | |
119 | 6152e2ae | aliguori | if (end_addr > mem->start_addr &&
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120 | 6152e2ae | aliguori | start_addr < mem->start_addr + mem->memory_size) { |
121 | 6152e2ae | aliguori | found = mem; |
122 | 6152e2ae | aliguori | } |
123 | 05330448 | aliguori | } |
124 | 05330448 | aliguori | |
125 | 6152e2ae | aliguori | return found;
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126 | 05330448 | aliguori | } |
127 | 05330448 | aliguori | |
128 | 5832d1f2 | aliguori | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
129 | 5832d1f2 | aliguori | { |
130 | 5832d1f2 | aliguori | struct kvm_userspace_memory_region mem;
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131 | 5832d1f2 | aliguori | |
132 | 5832d1f2 | aliguori | mem.slot = slot->slot; |
133 | 5832d1f2 | aliguori | mem.guest_phys_addr = slot->start_addr; |
134 | 5832d1f2 | aliguori | mem.memory_size = slot->memory_size; |
135 | 5579c7f3 | pbrook | mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
136 | 5832d1f2 | aliguori | mem.flags = slot->flags; |
137 | 5832d1f2 | aliguori | |
138 | 5832d1f2 | aliguori | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
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139 | 5832d1f2 | aliguori | } |
140 | 5832d1f2 | aliguori | |
141 | 5832d1f2 | aliguori | |
142 | 05330448 | aliguori | int kvm_init_vcpu(CPUState *env)
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143 | 05330448 | aliguori | { |
144 | 05330448 | aliguori | KVMState *s = kvm_state; |
145 | 05330448 | aliguori | long mmap_size;
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146 | 05330448 | aliguori | int ret;
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147 | 05330448 | aliguori | |
148 | 05330448 | aliguori | dprintf("kvm_init_vcpu\n");
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149 | 05330448 | aliguori | |
150 | 984b5181 | aliguori | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
151 | 05330448 | aliguori | if (ret < 0) { |
152 | 05330448 | aliguori | dprintf("kvm_create_vcpu failed\n");
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153 | 05330448 | aliguori | goto err;
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154 | 05330448 | aliguori | } |
155 | 05330448 | aliguori | |
156 | 05330448 | aliguori | env->kvm_fd = ret; |
157 | 05330448 | aliguori | env->kvm_state = s; |
158 | 05330448 | aliguori | |
159 | 05330448 | aliguori | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
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160 | 05330448 | aliguori | if (mmap_size < 0) { |
161 | 05330448 | aliguori | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n");
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162 | 05330448 | aliguori | goto err;
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163 | 05330448 | aliguori | } |
164 | 05330448 | aliguori | |
165 | 05330448 | aliguori | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
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166 | 05330448 | aliguori | env->kvm_fd, 0);
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167 | 05330448 | aliguori | if (env->kvm_run == MAP_FAILED) {
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168 | 05330448 | aliguori | ret = -errno; |
169 | 05330448 | aliguori | dprintf("mmap'ing vcpu state failed\n");
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170 | 05330448 | aliguori | goto err;
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171 | 05330448 | aliguori | } |
172 | 05330448 | aliguori | |
173 | 05330448 | aliguori | ret = kvm_arch_init_vcpu(env); |
174 | 05330448 | aliguori | |
175 | 05330448 | aliguori | err:
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176 | 05330448 | aliguori | return ret;
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177 | 05330448 | aliguori | } |
178 | 05330448 | aliguori | |
179 | f5d6f51b | aliguori | int kvm_sync_vcpus(void) |
180 | f5d6f51b | aliguori | { |
181 | f5d6f51b | aliguori | CPUState *env; |
182 | f5d6f51b | aliguori | |
183 | f5d6f51b | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
184 | f5d6f51b | aliguori | int ret;
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185 | f5d6f51b | aliguori | |
186 | f5d6f51b | aliguori | ret = kvm_arch_put_registers(env); |
187 | f5d6f51b | aliguori | if (ret)
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188 | f5d6f51b | aliguori | return ret;
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189 | f5d6f51b | aliguori | } |
190 | f5d6f51b | aliguori | |
191 | f5d6f51b | aliguori | return 0; |
192 | f5d6f51b | aliguori | } |
193 | f5d6f51b | aliguori | |
194 | 5832d1f2 | aliguori | /*
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195 | 5832d1f2 | aliguori | * dirty pages logging control
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196 | 5832d1f2 | aliguori | */
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197 | d3f8d37f | aliguori | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
198 | d3f8d37f | aliguori | ram_addr_t size, unsigned flags,
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199 | 5832d1f2 | aliguori | unsigned mask)
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200 | 5832d1f2 | aliguori | { |
201 | 5832d1f2 | aliguori | KVMState *s = kvm_state; |
202 | d3f8d37f | aliguori | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
203 | 5832d1f2 | aliguori | if (mem == NULL) { |
204 | d3f8d37f | aliguori | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
205 | d3f8d37f | aliguori | TARGET_FMT_plx "\n", __func__, phys_addr,
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206 | d3f8d37f | aliguori | phys_addr + size - 1);
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207 | 5832d1f2 | aliguori | return -EINVAL;
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208 | 5832d1f2 | aliguori | } |
209 | 5832d1f2 | aliguori | |
210 | 5832d1f2 | aliguori | flags = (mem->flags & ~mask) | flags; |
211 | 5832d1f2 | aliguori | /* Nothing changed, no need to issue ioctl */
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212 | 5832d1f2 | aliguori | if (flags == mem->flags)
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213 | 5832d1f2 | aliguori | return 0; |
214 | 5832d1f2 | aliguori | |
215 | 5832d1f2 | aliguori | mem->flags = flags; |
216 | 5832d1f2 | aliguori | |
217 | 5832d1f2 | aliguori | return kvm_set_user_memory_region(s, mem);
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218 | 5832d1f2 | aliguori | } |
219 | 5832d1f2 | aliguori | |
220 | d3f8d37f | aliguori | int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
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221 | 5832d1f2 | aliguori | { |
222 | d3f8d37f | aliguori | return kvm_dirty_pages_log_change(phys_addr, size,
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223 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES, |
224 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES); |
225 | 5832d1f2 | aliguori | } |
226 | 5832d1f2 | aliguori | |
227 | d3f8d37f | aliguori | int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
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228 | 5832d1f2 | aliguori | { |
229 | d3f8d37f | aliguori | return kvm_dirty_pages_log_change(phys_addr, size,
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230 | 5832d1f2 | aliguori | 0,
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231 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES); |
232 | 5832d1f2 | aliguori | } |
233 | 5832d1f2 | aliguori | |
234 | 5832d1f2 | aliguori | /**
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235 | 5832d1f2 | aliguori | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
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236 | 5832d1f2 | aliguori | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
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237 | 5832d1f2 | aliguori | * This means all bits are set to dirty.
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238 | 5832d1f2 | aliguori | *
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239 | d3f8d37f | aliguori | * @start_add: start of logged region.
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240 | 5832d1f2 | aliguori | * @end_addr: end of logged region.
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241 | 5832d1f2 | aliguori | */
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242 | d3f8d37f | aliguori | void kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
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243 | d3f8d37f | aliguori | target_phys_addr_t end_addr) |
244 | 5832d1f2 | aliguori | { |
245 | 5832d1f2 | aliguori | KVMState *s = kvm_state; |
246 | 5832d1f2 | aliguori | KVMDirtyLog d; |
247 | d3f8d37f | aliguori | KVMSlot *mem = kvm_lookup_matching_slot(s, start_addr, end_addr); |
248 | 5832d1f2 | aliguori | unsigned long alloc_size; |
249 | 5832d1f2 | aliguori | ram_addr_t addr; |
250 | 5832d1f2 | aliguori | target_phys_addr_t phys_addr = start_addr; |
251 | 5832d1f2 | aliguori | |
252 | d3f8d37f | aliguori | dprintf("sync addr: " TARGET_FMT_lx " into %lx\n", start_addr, |
253 | d3f8d37f | aliguori | mem->phys_offset); |
254 | 5832d1f2 | aliguori | if (mem == NULL) { |
255 | d3f8d37f | aliguori | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
256 | d3f8d37f | aliguori | TARGET_FMT_plx "\n", __func__, phys_addr, end_addr - 1); |
257 | 5832d1f2 | aliguori | return;
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258 | 5832d1f2 | aliguori | } |
259 | 5832d1f2 | aliguori | |
260 | 5832d1f2 | aliguori | alloc_size = mem->memory_size >> TARGET_PAGE_BITS / sizeof(d.dirty_bitmap);
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261 | 5832d1f2 | aliguori | d.dirty_bitmap = qemu_mallocz(alloc_size); |
262 | 5832d1f2 | aliguori | |
263 | 5832d1f2 | aliguori | d.slot = mem->slot; |
264 | 5832d1f2 | aliguori | dprintf("slot %d, phys_addr %llx, uaddr: %llx\n",
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265 | 5832d1f2 | aliguori | d.slot, mem->start_addr, mem->phys_offset); |
266 | 5832d1f2 | aliguori | |
267 | 5832d1f2 | aliguori | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
268 | 5832d1f2 | aliguori | dprintf("ioctl failed %d\n", errno);
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269 | 5832d1f2 | aliguori | goto out;
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270 | 5832d1f2 | aliguori | } |
271 | 5832d1f2 | aliguori | |
272 | 5832d1f2 | aliguori | phys_addr = start_addr; |
273 | 5832d1f2 | aliguori | for (addr = mem->phys_offset; phys_addr < end_addr; phys_addr+= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) {
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274 | 5832d1f2 | aliguori | unsigned long *bitmap = (unsigned long *)d.dirty_bitmap; |
275 | 5832d1f2 | aliguori | unsigned nr = (phys_addr - start_addr) >> TARGET_PAGE_BITS;
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276 | 5832d1f2 | aliguori | unsigned word = nr / (sizeof(*bitmap) * 8); |
277 | 5832d1f2 | aliguori | unsigned bit = nr % (sizeof(*bitmap) * 8); |
278 | 5832d1f2 | aliguori | if ((bitmap[word] >> bit) & 1) |
279 | 5832d1f2 | aliguori | cpu_physical_memory_set_dirty(addr); |
280 | 5832d1f2 | aliguori | } |
281 | 5832d1f2 | aliguori | out:
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282 | 5832d1f2 | aliguori | qemu_free(d.dirty_bitmap); |
283 | 5832d1f2 | aliguori | } |
284 | 5832d1f2 | aliguori | |
285 | f65ed4c1 | aliguori | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
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286 | f65ed4c1 | aliguori | { |
287 | f65ed4c1 | aliguori | int ret = -ENOSYS;
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288 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
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289 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
290 | f65ed4c1 | aliguori | |
291 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
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292 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_zone zone;
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293 | f65ed4c1 | aliguori | |
294 | f65ed4c1 | aliguori | zone.addr = start; |
295 | f65ed4c1 | aliguori | zone.size = size; |
296 | f65ed4c1 | aliguori | |
297 | f65ed4c1 | aliguori | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
298 | f65ed4c1 | aliguori | } |
299 | f65ed4c1 | aliguori | #endif
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300 | f65ed4c1 | aliguori | |
301 | f65ed4c1 | aliguori | return ret;
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302 | f65ed4c1 | aliguori | } |
303 | f65ed4c1 | aliguori | |
304 | f65ed4c1 | aliguori | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
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305 | f65ed4c1 | aliguori | { |
306 | f65ed4c1 | aliguori | int ret = -ENOSYS;
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307 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
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308 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
309 | f65ed4c1 | aliguori | |
310 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
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311 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_zone zone;
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312 | f65ed4c1 | aliguori | |
313 | f65ed4c1 | aliguori | zone.addr = start; |
314 | f65ed4c1 | aliguori | zone.size = size; |
315 | f65ed4c1 | aliguori | |
316 | f65ed4c1 | aliguori | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
317 | f65ed4c1 | aliguori | } |
318 | f65ed4c1 | aliguori | #endif
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319 | f65ed4c1 | aliguori | |
320 | f65ed4c1 | aliguori | return ret;
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321 | f65ed4c1 | aliguori | } |
322 | f65ed4c1 | aliguori | |
323 | ad7b8b33 | Anthony Liguori | int kvm_check_extension(KVMState *s, unsigned int extension) |
324 | ad7b8b33 | Anthony Liguori | { |
325 | ad7b8b33 | Anthony Liguori | int ret;
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326 | ad7b8b33 | Anthony Liguori | |
327 | ad7b8b33 | Anthony Liguori | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
328 | ad7b8b33 | Anthony Liguori | if (ret < 0) { |
329 | ad7b8b33 | Anthony Liguori | ret = 0;
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330 | ad7b8b33 | Anthony Liguori | } |
331 | ad7b8b33 | Anthony Liguori | |
332 | ad7b8b33 | Anthony Liguori | return ret;
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333 | ad7b8b33 | Anthony Liguori | } |
334 | ad7b8b33 | Anthony Liguori | |
335 | 05330448 | aliguori | int kvm_init(int smp_cpus) |
336 | 05330448 | aliguori | { |
337 | 05330448 | aliguori | KVMState *s; |
338 | 05330448 | aliguori | int ret;
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339 | 05330448 | aliguori | int i;
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340 | 05330448 | aliguori | |
341 | 9f8fd694 | Mark McLoughlin | if (smp_cpus > 1) { |
342 | 9f8fd694 | Mark McLoughlin | fprintf(stderr, "No SMP KVM support, use '-smp 1'\n");
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343 | 05330448 | aliguori | return -EINVAL;
|
344 | 9f8fd694 | Mark McLoughlin | } |
345 | 05330448 | aliguori | |
346 | 05330448 | aliguori | s = qemu_mallocz(sizeof(KVMState));
|
347 | 05330448 | aliguori | |
348 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
349 | e22a25c9 | aliguori | TAILQ_INIT(&s->kvm_sw_breakpoints); |
350 | e22a25c9 | aliguori | #endif
|
351 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
352 | 05330448 | aliguori | s->slots[i].slot = i; |
353 | 05330448 | aliguori | |
354 | 05330448 | aliguori | s->vmfd = -1;
|
355 | 05330448 | aliguori | s->fd = open("/dev/kvm", O_RDWR);
|
356 | 05330448 | aliguori | if (s->fd == -1) { |
357 | 05330448 | aliguori | fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
358 | 05330448 | aliguori | ret = -errno; |
359 | 05330448 | aliguori | goto err;
|
360 | 05330448 | aliguori | } |
361 | 05330448 | aliguori | |
362 | 05330448 | aliguori | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
363 | 05330448 | aliguori | if (ret < KVM_API_VERSION) {
|
364 | 05330448 | aliguori | if (ret > 0) |
365 | 05330448 | aliguori | ret = -EINVAL; |
366 | 05330448 | aliguori | fprintf(stderr, "kvm version too old\n");
|
367 | 05330448 | aliguori | goto err;
|
368 | 05330448 | aliguori | } |
369 | 05330448 | aliguori | |
370 | 05330448 | aliguori | if (ret > KVM_API_VERSION) {
|
371 | 05330448 | aliguori | ret = -EINVAL; |
372 | 05330448 | aliguori | fprintf(stderr, "kvm version not supported\n");
|
373 | 05330448 | aliguori | goto err;
|
374 | 05330448 | aliguori | } |
375 | 05330448 | aliguori | |
376 | 05330448 | aliguori | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
377 | 05330448 | aliguori | if (s->vmfd < 0) |
378 | 05330448 | aliguori | goto err;
|
379 | 05330448 | aliguori | |
380 | 05330448 | aliguori | /* initially, KVM allocated its own memory and we had to jump through
|
381 | 05330448 | aliguori | * hooks to make phys_ram_base point to this. Modern versions of KVM
|
382 | 5579c7f3 | pbrook | * just use a user allocated buffer so we can use regular pages
|
383 | 05330448 | aliguori | * unmodified. Make sure we have a sufficiently modern version of KVM.
|
384 | 05330448 | aliguori | */
|
385 | ad7b8b33 | Anthony Liguori | if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) {
|
386 | ad7b8b33 | Anthony Liguori | ret = -EINVAL; |
387 | 05330448 | aliguori | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n");
|
388 | 05330448 | aliguori | goto err;
|
389 | 05330448 | aliguori | } |
390 | 05330448 | aliguori | |
391 | d85dc283 | aliguori | /* There was a nasty bug in < kvm-80 that prevents memory slots from being
|
392 | d85dc283 | aliguori | * destroyed properly. Since we rely on this capability, refuse to work
|
393 | d85dc283 | aliguori | * with any kernel without this capability. */
|
394 | ad7b8b33 | Anthony Liguori | if (!kvm_check_extension(s, KVM_CAP_DESTROY_MEMORY_REGION_WORKS)) {
|
395 | ad7b8b33 | Anthony Liguori | ret = -EINVAL; |
396 | d85dc283 | aliguori | |
397 | d85dc283 | aliguori | fprintf(stderr, |
398 | d85dc283 | aliguori | "KVM kernel module broken (DESTROY_MEMORY_REGION)\n"
|
399 | d85dc283 | aliguori | "Please upgrade to at least kvm-81.\n");
|
400 | d85dc283 | aliguori | goto err;
|
401 | d85dc283 | aliguori | } |
402 | d85dc283 | aliguori | |
403 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
404 | ad7b8b33 | Anthony Liguori | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
405 | ad7b8b33 | Anthony Liguori | #else
|
406 | ad7b8b33 | Anthony Liguori | s->coalesced_mmio = 0;
|
407 | f65ed4c1 | aliguori | #endif
|
408 | f65ed4c1 | aliguori | |
409 | 05330448 | aliguori | ret = kvm_arch_init(s, smp_cpus); |
410 | 05330448 | aliguori | if (ret < 0) |
411 | 05330448 | aliguori | goto err;
|
412 | 05330448 | aliguori | |
413 | 05330448 | aliguori | kvm_state = s; |
414 | 05330448 | aliguori | |
415 | 05330448 | aliguori | return 0; |
416 | 05330448 | aliguori | |
417 | 05330448 | aliguori | err:
|
418 | 05330448 | aliguori | if (s) {
|
419 | 05330448 | aliguori | if (s->vmfd != -1) |
420 | 05330448 | aliguori | close(s->vmfd); |
421 | 05330448 | aliguori | if (s->fd != -1) |
422 | 05330448 | aliguori | close(s->fd); |
423 | 05330448 | aliguori | } |
424 | 05330448 | aliguori | qemu_free(s); |
425 | 05330448 | aliguori | |
426 | 05330448 | aliguori | return ret;
|
427 | 05330448 | aliguori | } |
428 | 05330448 | aliguori | |
429 | 05330448 | aliguori | static int kvm_handle_io(CPUState *env, uint16_t port, void *data, |
430 | 05330448 | aliguori | int direction, int size, uint32_t count) |
431 | 05330448 | aliguori | { |
432 | 05330448 | aliguori | int i;
|
433 | 05330448 | aliguori | uint8_t *ptr = data; |
434 | 05330448 | aliguori | |
435 | 05330448 | aliguori | for (i = 0; i < count; i++) { |
436 | 05330448 | aliguori | if (direction == KVM_EXIT_IO_IN) {
|
437 | 05330448 | aliguori | switch (size) {
|
438 | 05330448 | aliguori | case 1: |
439 | 05330448 | aliguori | stb_p(ptr, cpu_inb(env, port)); |
440 | 05330448 | aliguori | break;
|
441 | 05330448 | aliguori | case 2: |
442 | 05330448 | aliguori | stw_p(ptr, cpu_inw(env, port)); |
443 | 05330448 | aliguori | break;
|
444 | 05330448 | aliguori | case 4: |
445 | 05330448 | aliguori | stl_p(ptr, cpu_inl(env, port)); |
446 | 05330448 | aliguori | break;
|
447 | 05330448 | aliguori | } |
448 | 05330448 | aliguori | } else {
|
449 | 05330448 | aliguori | switch (size) {
|
450 | 05330448 | aliguori | case 1: |
451 | 05330448 | aliguori | cpu_outb(env, port, ldub_p(ptr)); |
452 | 05330448 | aliguori | break;
|
453 | 05330448 | aliguori | case 2: |
454 | 05330448 | aliguori | cpu_outw(env, port, lduw_p(ptr)); |
455 | 05330448 | aliguori | break;
|
456 | 05330448 | aliguori | case 4: |
457 | 05330448 | aliguori | cpu_outl(env, port, ldl_p(ptr)); |
458 | 05330448 | aliguori | break;
|
459 | 05330448 | aliguori | } |
460 | 05330448 | aliguori | } |
461 | 05330448 | aliguori | |
462 | 05330448 | aliguori | ptr += size; |
463 | 05330448 | aliguori | } |
464 | 05330448 | aliguori | |
465 | 05330448 | aliguori | return 1; |
466 | 05330448 | aliguori | } |
467 | 05330448 | aliguori | |
468 | f65ed4c1 | aliguori | static void kvm_run_coalesced_mmio(CPUState *env, struct kvm_run *run) |
469 | f65ed4c1 | aliguori | { |
470 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
471 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
472 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
|
473 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_ring *ring;
|
474 | f65ed4c1 | aliguori | |
475 | f65ed4c1 | aliguori | ring = (void *)run + (s->coalesced_mmio * TARGET_PAGE_SIZE);
|
476 | f65ed4c1 | aliguori | while (ring->first != ring->last) {
|
477 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio *ent;
|
478 | f65ed4c1 | aliguori | |
479 | f65ed4c1 | aliguori | ent = &ring->coalesced_mmio[ring->first]; |
480 | f65ed4c1 | aliguori | |
481 | f65ed4c1 | aliguori | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
482 | f65ed4c1 | aliguori | /* FIXME smp_wmb() */
|
483 | f65ed4c1 | aliguori | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
484 | f65ed4c1 | aliguori | } |
485 | f65ed4c1 | aliguori | } |
486 | f65ed4c1 | aliguori | #endif
|
487 | f65ed4c1 | aliguori | } |
488 | f65ed4c1 | aliguori | |
489 | 05330448 | aliguori | int kvm_cpu_exec(CPUState *env)
|
490 | 05330448 | aliguori | { |
491 | 05330448 | aliguori | struct kvm_run *run = env->kvm_run;
|
492 | 05330448 | aliguori | int ret;
|
493 | 05330448 | aliguori | |
494 | 05330448 | aliguori | dprintf("kvm_cpu_exec()\n");
|
495 | 05330448 | aliguori | |
496 | 05330448 | aliguori | do {
|
497 | 05330448 | aliguori | kvm_arch_pre_run(env, run); |
498 | 05330448 | aliguori | |
499 | be214e6c | aurel32 | if (env->exit_request) {
|
500 | 05330448 | aliguori | dprintf("interrupt exit requested\n");
|
501 | 05330448 | aliguori | ret = 0;
|
502 | 05330448 | aliguori | break;
|
503 | 05330448 | aliguori | } |
504 | 05330448 | aliguori | |
505 | 05330448 | aliguori | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
|
506 | 05330448 | aliguori | kvm_arch_post_run(env, run); |
507 | 05330448 | aliguori | |
508 | 05330448 | aliguori | if (ret == -EINTR || ret == -EAGAIN) {
|
509 | 05330448 | aliguori | dprintf("io window exit\n");
|
510 | 05330448 | aliguori | ret = 0;
|
511 | 05330448 | aliguori | break;
|
512 | 05330448 | aliguori | } |
513 | 05330448 | aliguori | |
514 | 05330448 | aliguori | if (ret < 0) { |
515 | 05330448 | aliguori | dprintf("kvm run failed %s\n", strerror(-ret));
|
516 | 05330448 | aliguori | abort(); |
517 | 05330448 | aliguori | } |
518 | 05330448 | aliguori | |
519 | f65ed4c1 | aliguori | kvm_run_coalesced_mmio(env, run); |
520 | f65ed4c1 | aliguori | |
521 | 05330448 | aliguori | ret = 0; /* exit loop */ |
522 | 05330448 | aliguori | switch (run->exit_reason) {
|
523 | 05330448 | aliguori | case KVM_EXIT_IO:
|
524 | 05330448 | aliguori | dprintf("handle_io\n");
|
525 | 05330448 | aliguori | ret = kvm_handle_io(env, run->io.port, |
526 | 05330448 | aliguori | (uint8_t *)run + run->io.data_offset, |
527 | 05330448 | aliguori | run->io.direction, |
528 | 05330448 | aliguori | run->io.size, |
529 | 05330448 | aliguori | run->io.count); |
530 | 05330448 | aliguori | break;
|
531 | 05330448 | aliguori | case KVM_EXIT_MMIO:
|
532 | 05330448 | aliguori | dprintf("handle_mmio\n");
|
533 | 05330448 | aliguori | cpu_physical_memory_rw(run->mmio.phys_addr, |
534 | 05330448 | aliguori | run->mmio.data, |
535 | 05330448 | aliguori | run->mmio.len, |
536 | 05330448 | aliguori | run->mmio.is_write); |
537 | 05330448 | aliguori | ret = 1;
|
538 | 05330448 | aliguori | break;
|
539 | 05330448 | aliguori | case KVM_EXIT_IRQ_WINDOW_OPEN:
|
540 | 05330448 | aliguori | dprintf("irq_window_open\n");
|
541 | 05330448 | aliguori | break;
|
542 | 05330448 | aliguori | case KVM_EXIT_SHUTDOWN:
|
543 | 05330448 | aliguori | dprintf("shutdown\n");
|
544 | 05330448 | aliguori | qemu_system_reset_request(); |
545 | 05330448 | aliguori | ret = 1;
|
546 | 05330448 | aliguori | break;
|
547 | 05330448 | aliguori | case KVM_EXIT_UNKNOWN:
|
548 | 05330448 | aliguori | dprintf("kvm_exit_unknown\n");
|
549 | 05330448 | aliguori | break;
|
550 | 05330448 | aliguori | case KVM_EXIT_FAIL_ENTRY:
|
551 | 05330448 | aliguori | dprintf("kvm_exit_fail_entry\n");
|
552 | 05330448 | aliguori | break;
|
553 | 05330448 | aliguori | case KVM_EXIT_EXCEPTION:
|
554 | 05330448 | aliguori | dprintf("kvm_exit_exception\n");
|
555 | 05330448 | aliguori | break;
|
556 | 05330448 | aliguori | case KVM_EXIT_DEBUG:
|
557 | 05330448 | aliguori | dprintf("kvm_exit_debug\n");
|
558 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
559 | e22a25c9 | aliguori | if (kvm_arch_debug(&run->debug.arch)) {
|
560 | e22a25c9 | aliguori | gdb_set_stop_cpu(env); |
561 | e22a25c9 | aliguori | vm_stop(EXCP_DEBUG); |
562 | e22a25c9 | aliguori | env->exception_index = EXCP_DEBUG; |
563 | e22a25c9 | aliguori | return 0; |
564 | e22a25c9 | aliguori | } |
565 | e22a25c9 | aliguori | /* re-enter, this exception was guest-internal */
|
566 | e22a25c9 | aliguori | ret = 1;
|
567 | e22a25c9 | aliguori | #endif /* KVM_CAP_SET_GUEST_DEBUG */ |
568 | 05330448 | aliguori | break;
|
569 | 05330448 | aliguori | default:
|
570 | 05330448 | aliguori | dprintf("kvm_arch_handle_exit\n");
|
571 | 05330448 | aliguori | ret = kvm_arch_handle_exit(env, run); |
572 | 05330448 | aliguori | break;
|
573 | 05330448 | aliguori | } |
574 | 05330448 | aliguori | } while (ret > 0); |
575 | 05330448 | aliguori | |
576 | be214e6c | aurel32 | if (env->exit_request) {
|
577 | be214e6c | aurel32 | env->exit_request = 0;
|
578 | becfc390 | aliguori | env->exception_index = EXCP_INTERRUPT; |
579 | becfc390 | aliguori | } |
580 | becfc390 | aliguori | |
581 | 05330448 | aliguori | return ret;
|
582 | 05330448 | aliguori | } |
583 | 05330448 | aliguori | |
584 | 05330448 | aliguori | void kvm_set_phys_mem(target_phys_addr_t start_addr,
|
585 | 05330448 | aliguori | ram_addr_t size, |
586 | 05330448 | aliguori | ram_addr_t phys_offset) |
587 | 05330448 | aliguori | { |
588 | 05330448 | aliguori | KVMState *s = kvm_state; |
589 | 05330448 | aliguori | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
590 | 6152e2ae | aliguori | KVMSlot *mem, old; |
591 | 6152e2ae | aliguori | int err;
|
592 | 05330448 | aliguori | |
593 | d3f8d37f | aliguori | if (start_addr & ~TARGET_PAGE_MASK) {
|
594 | e6f4afe0 | Jan Kiszka | if (flags >= IO_MEM_UNASSIGNED) {
|
595 | e6f4afe0 | Jan Kiszka | if (!kvm_lookup_overlapping_slot(s, start_addr,
|
596 | e6f4afe0 | Jan Kiszka | start_addr + size)) { |
597 | e6f4afe0 | Jan Kiszka | return;
|
598 | e6f4afe0 | Jan Kiszka | } |
599 | e6f4afe0 | Jan Kiszka | fprintf(stderr, "Unaligned split of a KVM memory slot\n");
|
600 | e6f4afe0 | Jan Kiszka | } else {
|
601 | e6f4afe0 | Jan Kiszka | fprintf(stderr, "Only page-aligned memory slots supported\n");
|
602 | e6f4afe0 | Jan Kiszka | } |
603 | d3f8d37f | aliguori | abort(); |
604 | d3f8d37f | aliguori | } |
605 | d3f8d37f | aliguori | |
606 | 05330448 | aliguori | /* KVM does not support read-only slots */
|
607 | 05330448 | aliguori | phys_offset &= ~IO_MEM_ROM; |
608 | 05330448 | aliguori | |
609 | 6152e2ae | aliguori | while (1) { |
610 | 6152e2ae | aliguori | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
611 | 6152e2ae | aliguori | if (!mem) {
|
612 | 6152e2ae | aliguori | break;
|
613 | 6152e2ae | aliguori | } |
614 | 62d60e8c | aliguori | |
615 | 6152e2ae | aliguori | if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
|
616 | 6152e2ae | aliguori | (start_addr + size <= mem->start_addr + mem->memory_size) && |
617 | 6152e2ae | aliguori | (phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
618 | 6152e2ae | aliguori | /* The new slot fits into the existing one and comes with
|
619 | 6152e2ae | aliguori | * identical parameters - nothing to be done. */
|
620 | 05330448 | aliguori | return;
|
621 | 6152e2ae | aliguori | } |
622 | 6152e2ae | aliguori | |
623 | 6152e2ae | aliguori | old = *mem; |
624 | 6152e2ae | aliguori | |
625 | 6152e2ae | aliguori | /* unregister the overlapping slot */
|
626 | 6152e2ae | aliguori | mem->memory_size = 0;
|
627 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
628 | 6152e2ae | aliguori | if (err) {
|
629 | 6152e2ae | aliguori | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
630 | 6152e2ae | aliguori | __func__, strerror(-err)); |
631 | 62d60e8c | aliguori | abort(); |
632 | 62d60e8c | aliguori | } |
633 | 6152e2ae | aliguori | |
634 | 6152e2ae | aliguori | /* Workaround for older KVM versions: we can't join slots, even not by
|
635 | 6152e2ae | aliguori | * unregistering the previous ones and then registering the larger
|
636 | 6152e2ae | aliguori | * slot. We have to maintain the existing fragmentation. Sigh.
|
637 | 6152e2ae | aliguori | *
|
638 | 6152e2ae | aliguori | * This workaround assumes that the new slot starts at the same
|
639 | 6152e2ae | aliguori | * address as the first existing one. If not or if some overlapping
|
640 | 6152e2ae | aliguori | * slot comes around later, we will fail (not seen in practice so far)
|
641 | 6152e2ae | aliguori | * - and actually require a recent KVM version. */
|
642 | 6152e2ae | aliguori | if (old.start_addr == start_addr && old.memory_size < size &&
|
643 | 6152e2ae | aliguori | flags < IO_MEM_UNASSIGNED) { |
644 | 6152e2ae | aliguori | mem = kvm_alloc_slot(s); |
645 | 6152e2ae | aliguori | mem->memory_size = old.memory_size; |
646 | 6152e2ae | aliguori | mem->start_addr = old.start_addr; |
647 | 6152e2ae | aliguori | mem->phys_offset = old.phys_offset; |
648 | 6152e2ae | aliguori | mem->flags = 0;
|
649 | 6152e2ae | aliguori | |
650 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
651 | 6152e2ae | aliguori | if (err) {
|
652 | 6152e2ae | aliguori | fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
653 | 6152e2ae | aliguori | strerror(-err)); |
654 | 6152e2ae | aliguori | abort(); |
655 | 6152e2ae | aliguori | } |
656 | 6152e2ae | aliguori | |
657 | 6152e2ae | aliguori | start_addr += old.memory_size; |
658 | 6152e2ae | aliguori | phys_offset += old.memory_size; |
659 | 6152e2ae | aliguori | size -= old.memory_size; |
660 | 6152e2ae | aliguori | continue;
|
661 | 6152e2ae | aliguori | } |
662 | 6152e2ae | aliguori | |
663 | 6152e2ae | aliguori | /* register prefix slot */
|
664 | 6152e2ae | aliguori | if (old.start_addr < start_addr) {
|
665 | 6152e2ae | aliguori | mem = kvm_alloc_slot(s); |
666 | 6152e2ae | aliguori | mem->memory_size = start_addr - old.start_addr; |
667 | 6152e2ae | aliguori | mem->start_addr = old.start_addr; |
668 | 6152e2ae | aliguori | mem->phys_offset = old.phys_offset; |
669 | 6152e2ae | aliguori | mem->flags = 0;
|
670 | 6152e2ae | aliguori | |
671 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
672 | 6152e2ae | aliguori | if (err) {
|
673 | 6152e2ae | aliguori | fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
674 | 6152e2ae | aliguori | __func__, strerror(-err)); |
675 | 6152e2ae | aliguori | abort(); |
676 | 6152e2ae | aliguori | } |
677 | 6152e2ae | aliguori | } |
678 | 6152e2ae | aliguori | |
679 | 6152e2ae | aliguori | /* register suffix slot */
|
680 | 6152e2ae | aliguori | if (old.start_addr + old.memory_size > start_addr + size) {
|
681 | 6152e2ae | aliguori | ram_addr_t size_delta; |
682 | 6152e2ae | aliguori | |
683 | 6152e2ae | aliguori | mem = kvm_alloc_slot(s); |
684 | 6152e2ae | aliguori | mem->start_addr = start_addr + size; |
685 | 6152e2ae | aliguori | size_delta = mem->start_addr - old.start_addr; |
686 | 6152e2ae | aliguori | mem->memory_size = old.memory_size - size_delta; |
687 | 6152e2ae | aliguori | mem->phys_offset = old.phys_offset + size_delta; |
688 | 6152e2ae | aliguori | mem->flags = 0;
|
689 | 6152e2ae | aliguori | |
690 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
691 | 6152e2ae | aliguori | if (err) {
|
692 | 6152e2ae | aliguori | fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
693 | 6152e2ae | aliguori | __func__, strerror(-err)); |
694 | 6152e2ae | aliguori | abort(); |
695 | 6152e2ae | aliguori | } |
696 | 6152e2ae | aliguori | } |
697 | 05330448 | aliguori | } |
698 | 6152e2ae | aliguori | |
699 | 6152e2ae | aliguori | /* in case the KVM bug workaround already "consumed" the new slot */
|
700 | 6152e2ae | aliguori | if (!size)
|
701 | 6152e2ae | aliguori | return;
|
702 | 6152e2ae | aliguori | |
703 | 05330448 | aliguori | /* KVM does not need to know about this memory */
|
704 | 05330448 | aliguori | if (flags >= IO_MEM_UNASSIGNED)
|
705 | 05330448 | aliguori | return;
|
706 | 05330448 | aliguori | |
707 | 05330448 | aliguori | mem = kvm_alloc_slot(s); |
708 | 05330448 | aliguori | mem->memory_size = size; |
709 | 34fc643f | aliguori | mem->start_addr = start_addr; |
710 | 34fc643f | aliguori | mem->phys_offset = phys_offset; |
711 | 05330448 | aliguori | mem->flags = 0;
|
712 | 05330448 | aliguori | |
713 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
714 | 6152e2ae | aliguori | if (err) {
|
715 | 6152e2ae | aliguori | fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
716 | 6152e2ae | aliguori | strerror(-err)); |
717 | 6152e2ae | aliguori | abort(); |
718 | 6152e2ae | aliguori | } |
719 | 05330448 | aliguori | } |
720 | 05330448 | aliguori | |
721 | 984b5181 | aliguori | int kvm_ioctl(KVMState *s, int type, ...) |
722 | 05330448 | aliguori | { |
723 | 05330448 | aliguori | int ret;
|
724 | 984b5181 | aliguori | void *arg;
|
725 | 984b5181 | aliguori | va_list ap; |
726 | 05330448 | aliguori | |
727 | 984b5181 | aliguori | va_start(ap, type); |
728 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
729 | 984b5181 | aliguori | va_end(ap); |
730 | 984b5181 | aliguori | |
731 | 984b5181 | aliguori | ret = ioctl(s->fd, type, arg); |
732 | 05330448 | aliguori | if (ret == -1) |
733 | 05330448 | aliguori | ret = -errno; |
734 | 05330448 | aliguori | |
735 | 05330448 | aliguori | return ret;
|
736 | 05330448 | aliguori | } |
737 | 05330448 | aliguori | |
738 | 984b5181 | aliguori | int kvm_vm_ioctl(KVMState *s, int type, ...) |
739 | 05330448 | aliguori | { |
740 | 05330448 | aliguori | int ret;
|
741 | 984b5181 | aliguori | void *arg;
|
742 | 984b5181 | aliguori | va_list ap; |
743 | 984b5181 | aliguori | |
744 | 984b5181 | aliguori | va_start(ap, type); |
745 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
746 | 984b5181 | aliguori | va_end(ap); |
747 | 05330448 | aliguori | |
748 | 984b5181 | aliguori | ret = ioctl(s->vmfd, type, arg); |
749 | 05330448 | aliguori | if (ret == -1) |
750 | 05330448 | aliguori | ret = -errno; |
751 | 05330448 | aliguori | |
752 | 05330448 | aliguori | return ret;
|
753 | 05330448 | aliguori | } |
754 | 05330448 | aliguori | |
755 | 984b5181 | aliguori | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
756 | 05330448 | aliguori | { |
757 | 05330448 | aliguori | int ret;
|
758 | 984b5181 | aliguori | void *arg;
|
759 | 984b5181 | aliguori | va_list ap; |
760 | 984b5181 | aliguori | |
761 | 984b5181 | aliguori | va_start(ap, type); |
762 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
763 | 984b5181 | aliguori | va_end(ap); |
764 | 05330448 | aliguori | |
765 | 984b5181 | aliguori | ret = ioctl(env->kvm_fd, type, arg); |
766 | 05330448 | aliguori | if (ret == -1) |
767 | 05330448 | aliguori | ret = -errno; |
768 | 05330448 | aliguori | |
769 | 05330448 | aliguori | return ret;
|
770 | 05330448 | aliguori | } |
771 | bd322087 | aliguori | |
772 | bd322087 | aliguori | int kvm_has_sync_mmu(void) |
773 | bd322087 | aliguori | { |
774 | a9c11522 | aurel32 | #ifdef KVM_CAP_SYNC_MMU
|
775 | bd322087 | aliguori | KVMState *s = kvm_state; |
776 | bd322087 | aliguori | |
777 | ad7b8b33 | Anthony Liguori | return kvm_check_extension(s, KVM_CAP_SYNC_MMU);
|
778 | ad7b8b33 | Anthony Liguori | #else
|
779 | bd322087 | aliguori | return 0; |
780 | ad7b8b33 | Anthony Liguori | #endif
|
781 | bd322087 | aliguori | } |
782 | e22a25c9 | aliguori | |
783 | 6f0437e8 | Jan Kiszka | void kvm_setup_guest_memory(void *start, size_t size) |
784 | 6f0437e8 | Jan Kiszka | { |
785 | 6f0437e8 | Jan Kiszka | if (!kvm_has_sync_mmu()) {
|
786 | 6f0437e8 | Jan Kiszka | #ifdef MADV_DONTFORK
|
787 | 6f0437e8 | Jan Kiszka | int ret = madvise(start, size, MADV_DONTFORK);
|
788 | 6f0437e8 | Jan Kiszka | |
789 | 6f0437e8 | Jan Kiszka | if (ret) {
|
790 | 6f0437e8 | Jan Kiszka | perror("madvice");
|
791 | 6f0437e8 | Jan Kiszka | exit(1);
|
792 | 6f0437e8 | Jan Kiszka | } |
793 | 6f0437e8 | Jan Kiszka | #else
|
794 | 6f0437e8 | Jan Kiszka | fprintf(stderr, |
795 | 6f0437e8 | Jan Kiszka | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
796 | 6f0437e8 | Jan Kiszka | exit(1);
|
797 | 6f0437e8 | Jan Kiszka | #endif
|
798 | 6f0437e8 | Jan Kiszka | } |
799 | 6f0437e8 | Jan Kiszka | } |
800 | 6f0437e8 | Jan Kiszka | |
801 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
802 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
|
803 | e22a25c9 | aliguori | target_ulong pc) |
804 | e22a25c9 | aliguori | { |
805 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
806 | e22a25c9 | aliguori | |
807 | e22a25c9 | aliguori | TAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
808 | e22a25c9 | aliguori | if (bp->pc == pc)
|
809 | e22a25c9 | aliguori | return bp;
|
810 | e22a25c9 | aliguori | } |
811 | e22a25c9 | aliguori | return NULL; |
812 | e22a25c9 | aliguori | } |
813 | e22a25c9 | aliguori | |
814 | e22a25c9 | aliguori | int kvm_sw_breakpoints_active(CPUState *env)
|
815 | e22a25c9 | aliguori | { |
816 | e22a25c9 | aliguori | return !TAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
|
817 | e22a25c9 | aliguori | } |
818 | e22a25c9 | aliguori | |
819 | e22a25c9 | aliguori | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
820 | e22a25c9 | aliguori | { |
821 | e22a25c9 | aliguori | struct kvm_guest_debug dbg;
|
822 | e22a25c9 | aliguori | |
823 | e22a25c9 | aliguori | dbg.control = 0;
|
824 | e22a25c9 | aliguori | if (env->singlestep_enabled)
|
825 | e22a25c9 | aliguori | dbg.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
826 | e22a25c9 | aliguori | |
827 | e22a25c9 | aliguori | kvm_arch_update_guest_debug(env, &dbg); |
828 | e22a25c9 | aliguori | dbg.control |= reinject_trap; |
829 | e22a25c9 | aliguori | |
830 | e22a25c9 | aliguori | return kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg);
|
831 | e22a25c9 | aliguori | } |
832 | e22a25c9 | aliguori | |
833 | e22a25c9 | aliguori | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
834 | e22a25c9 | aliguori | target_ulong len, int type)
|
835 | e22a25c9 | aliguori | { |
836 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
837 | e22a25c9 | aliguori | CPUState *env; |
838 | e22a25c9 | aliguori | int err;
|
839 | e22a25c9 | aliguori | |
840 | e22a25c9 | aliguori | if (type == GDB_BREAKPOINT_SW) {
|
841 | e22a25c9 | aliguori | bp = kvm_find_sw_breakpoint(current_env, addr); |
842 | e22a25c9 | aliguori | if (bp) {
|
843 | e22a25c9 | aliguori | bp->use_count++; |
844 | e22a25c9 | aliguori | return 0; |
845 | e22a25c9 | aliguori | } |
846 | e22a25c9 | aliguori | |
847 | e22a25c9 | aliguori | bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
848 | e22a25c9 | aliguori | if (!bp)
|
849 | e22a25c9 | aliguori | return -ENOMEM;
|
850 | e22a25c9 | aliguori | |
851 | e22a25c9 | aliguori | bp->pc = addr; |
852 | e22a25c9 | aliguori | bp->use_count = 1;
|
853 | e22a25c9 | aliguori | err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
854 | e22a25c9 | aliguori | if (err) {
|
855 | e22a25c9 | aliguori | free(bp); |
856 | e22a25c9 | aliguori | return err;
|
857 | e22a25c9 | aliguori | } |
858 | e22a25c9 | aliguori | |
859 | e22a25c9 | aliguori | TAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
860 | e22a25c9 | aliguori | bp, entry); |
861 | e22a25c9 | aliguori | } else {
|
862 | e22a25c9 | aliguori | err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
863 | e22a25c9 | aliguori | if (err)
|
864 | e22a25c9 | aliguori | return err;
|
865 | e22a25c9 | aliguori | } |
866 | e22a25c9 | aliguori | |
867 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
868 | e22a25c9 | aliguori | err = kvm_update_guest_debug(env, 0);
|
869 | e22a25c9 | aliguori | if (err)
|
870 | e22a25c9 | aliguori | return err;
|
871 | e22a25c9 | aliguori | } |
872 | e22a25c9 | aliguori | return 0; |
873 | e22a25c9 | aliguori | } |
874 | e22a25c9 | aliguori | |
875 | e22a25c9 | aliguori | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
876 | e22a25c9 | aliguori | target_ulong len, int type)
|
877 | e22a25c9 | aliguori | { |
878 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
879 | e22a25c9 | aliguori | CPUState *env; |
880 | e22a25c9 | aliguori | int err;
|
881 | e22a25c9 | aliguori | |
882 | e22a25c9 | aliguori | if (type == GDB_BREAKPOINT_SW) {
|
883 | e22a25c9 | aliguori | bp = kvm_find_sw_breakpoint(current_env, addr); |
884 | e22a25c9 | aliguori | if (!bp)
|
885 | e22a25c9 | aliguori | return -ENOENT;
|
886 | e22a25c9 | aliguori | |
887 | e22a25c9 | aliguori | if (bp->use_count > 1) { |
888 | e22a25c9 | aliguori | bp->use_count--; |
889 | e22a25c9 | aliguori | return 0; |
890 | e22a25c9 | aliguori | } |
891 | e22a25c9 | aliguori | |
892 | e22a25c9 | aliguori | err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
893 | e22a25c9 | aliguori | if (err)
|
894 | e22a25c9 | aliguori | return err;
|
895 | e22a25c9 | aliguori | |
896 | e22a25c9 | aliguori | TAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
897 | e22a25c9 | aliguori | qemu_free(bp); |
898 | e22a25c9 | aliguori | } else {
|
899 | e22a25c9 | aliguori | err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
900 | e22a25c9 | aliguori | if (err)
|
901 | e22a25c9 | aliguori | return err;
|
902 | e22a25c9 | aliguori | } |
903 | e22a25c9 | aliguori | |
904 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
905 | e22a25c9 | aliguori | err = kvm_update_guest_debug(env, 0);
|
906 | e22a25c9 | aliguori | if (err)
|
907 | e22a25c9 | aliguori | return err;
|
908 | e22a25c9 | aliguori | } |
909 | e22a25c9 | aliguori | return 0; |
910 | e22a25c9 | aliguori | } |
911 | e22a25c9 | aliguori | |
912 | e22a25c9 | aliguori | void kvm_remove_all_breakpoints(CPUState *current_env)
|
913 | e22a25c9 | aliguori | { |
914 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp, *next;
|
915 | e22a25c9 | aliguori | KVMState *s = current_env->kvm_state; |
916 | e22a25c9 | aliguori | CPUState *env; |
917 | e22a25c9 | aliguori | |
918 | e22a25c9 | aliguori | TAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
919 | e22a25c9 | aliguori | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
920 | e22a25c9 | aliguori | /* Try harder to find a CPU that currently sees the breakpoint. */
|
921 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
922 | e22a25c9 | aliguori | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) |
923 | e22a25c9 | aliguori | break;
|
924 | e22a25c9 | aliguori | } |
925 | e22a25c9 | aliguori | } |
926 | e22a25c9 | aliguori | } |
927 | e22a25c9 | aliguori | kvm_arch_remove_all_hw_breakpoints(); |
928 | e22a25c9 | aliguori | |
929 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) |
930 | e22a25c9 | aliguori | kvm_update_guest_debug(env, 0);
|
931 | e22a25c9 | aliguori | } |
932 | e22a25c9 | aliguori | |
933 | e22a25c9 | aliguori | #else /* !KVM_CAP_SET_GUEST_DEBUG */ |
934 | e22a25c9 | aliguori | |
935 | e22a25c9 | aliguori | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
936 | e22a25c9 | aliguori | { |
937 | e22a25c9 | aliguori | return -EINVAL;
|
938 | e22a25c9 | aliguori | } |
939 | e22a25c9 | aliguori | |
940 | e22a25c9 | aliguori | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
941 | e22a25c9 | aliguori | target_ulong len, int type)
|
942 | e22a25c9 | aliguori | { |
943 | e22a25c9 | aliguori | return -EINVAL;
|
944 | e22a25c9 | aliguori | } |
945 | e22a25c9 | aliguori | |
946 | e22a25c9 | aliguori | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
947 | e22a25c9 | aliguori | target_ulong len, int type)
|
948 | e22a25c9 | aliguori | { |
949 | e22a25c9 | aliguori | return -EINVAL;
|
950 | e22a25c9 | aliguori | } |
951 | e22a25c9 | aliguori | |
952 | e22a25c9 | aliguori | void kvm_remove_all_breakpoints(CPUState *current_env)
|
953 | e22a25c9 | aliguori | { |
954 | e22a25c9 | aliguori | } |
955 | e22a25c9 | aliguori | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ |