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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 | e69917e2 | Jan Kiszka | int broken_set_mem_region;
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61 | 4495d6a7 | Jan Kiszka | int migration_log;
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62 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
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63 | e22a25c9 | aliguori | struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
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64 | e22a25c9 | aliguori | #endif
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65 | 05330448 | aliguori | }; |
66 | 05330448 | aliguori | |
67 | 05330448 | aliguori | static KVMState *kvm_state;
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68 | 05330448 | aliguori | |
69 | 05330448 | aliguori | static KVMSlot *kvm_alloc_slot(KVMState *s)
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70 | 05330448 | aliguori | { |
71 | 05330448 | aliguori | int i;
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72 | 05330448 | aliguori | |
73 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
74 | 62d60e8c | aliguori | /* KVM private memory slots */
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75 | 62d60e8c | aliguori | if (i >= 8 && i < 12) |
76 | 62d60e8c | aliguori | continue;
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77 | 05330448 | aliguori | if (s->slots[i].memory_size == 0) |
78 | 05330448 | aliguori | return &s->slots[i];
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79 | 05330448 | aliguori | } |
80 | 05330448 | aliguori | |
81 | d3f8d37f | aliguori | fprintf(stderr, "%s: no free slot available\n", __func__);
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82 | d3f8d37f | aliguori | abort(); |
83 | d3f8d37f | aliguori | } |
84 | d3f8d37f | aliguori | |
85 | d3f8d37f | aliguori | static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
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86 | d3f8d37f | aliguori | target_phys_addr_t start_addr, |
87 | d3f8d37f | aliguori | target_phys_addr_t end_addr) |
88 | d3f8d37f | aliguori | { |
89 | d3f8d37f | aliguori | int i;
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90 | d3f8d37f | aliguori | |
91 | d3f8d37f | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
92 | d3f8d37f | aliguori | KVMSlot *mem = &s->slots[i]; |
93 | d3f8d37f | aliguori | |
94 | d3f8d37f | aliguori | if (start_addr == mem->start_addr &&
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95 | d3f8d37f | aliguori | end_addr == mem->start_addr + mem->memory_size) { |
96 | d3f8d37f | aliguori | return mem;
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97 | d3f8d37f | aliguori | } |
98 | d3f8d37f | aliguori | } |
99 | d3f8d37f | aliguori | |
100 | 05330448 | aliguori | return NULL; |
101 | 05330448 | aliguori | } |
102 | 05330448 | aliguori | |
103 | 6152e2ae | aliguori | /*
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104 | 6152e2ae | aliguori | * Find overlapping slot with lowest start address
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105 | 6152e2ae | aliguori | */
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106 | 6152e2ae | aliguori | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
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107 | 6152e2ae | aliguori | target_phys_addr_t start_addr, |
108 | 6152e2ae | aliguori | target_phys_addr_t end_addr) |
109 | 05330448 | aliguori | { |
110 | 6152e2ae | aliguori | KVMSlot *found = NULL;
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111 | 05330448 | aliguori | int i;
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112 | 05330448 | aliguori | |
113 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
114 | 05330448 | aliguori | KVMSlot *mem = &s->slots[i]; |
115 | 05330448 | aliguori | |
116 | 6152e2ae | aliguori | if (mem->memory_size == 0 || |
117 | 6152e2ae | aliguori | (found && found->start_addr < mem->start_addr)) { |
118 | 6152e2ae | aliguori | continue;
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119 | 6152e2ae | aliguori | } |
120 | 6152e2ae | aliguori | |
121 | 6152e2ae | aliguori | if (end_addr > mem->start_addr &&
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122 | 6152e2ae | aliguori | start_addr < mem->start_addr + mem->memory_size) { |
123 | 6152e2ae | aliguori | found = mem; |
124 | 6152e2ae | aliguori | } |
125 | 05330448 | aliguori | } |
126 | 05330448 | aliguori | |
127 | 6152e2ae | aliguori | return found;
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128 | 05330448 | aliguori | } |
129 | 05330448 | aliguori | |
130 | 5832d1f2 | aliguori | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
131 | 5832d1f2 | aliguori | { |
132 | 5832d1f2 | aliguori | struct kvm_userspace_memory_region mem;
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133 | 5832d1f2 | aliguori | |
134 | 5832d1f2 | aliguori | mem.slot = slot->slot; |
135 | 5832d1f2 | aliguori | mem.guest_phys_addr = slot->start_addr; |
136 | 5832d1f2 | aliguori | mem.memory_size = slot->memory_size; |
137 | 5579c7f3 | pbrook | mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
138 | 5832d1f2 | aliguori | mem.flags = slot->flags; |
139 | 4495d6a7 | Jan Kiszka | if (s->migration_log) {
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140 | 4495d6a7 | Jan Kiszka | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; |
141 | 4495d6a7 | Jan Kiszka | } |
142 | 5832d1f2 | aliguori | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
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143 | 5832d1f2 | aliguori | } |
144 | 5832d1f2 | aliguori | |
145 | 5832d1f2 | aliguori | |
146 | 05330448 | aliguori | int kvm_init_vcpu(CPUState *env)
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147 | 05330448 | aliguori | { |
148 | 05330448 | aliguori | KVMState *s = kvm_state; |
149 | 05330448 | aliguori | long mmap_size;
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150 | 05330448 | aliguori | int ret;
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151 | 05330448 | aliguori | |
152 | 05330448 | aliguori | dprintf("kvm_init_vcpu\n");
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153 | 05330448 | aliguori | |
154 | 984b5181 | aliguori | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
155 | 05330448 | aliguori | if (ret < 0) { |
156 | 05330448 | aliguori | dprintf("kvm_create_vcpu failed\n");
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157 | 05330448 | aliguori | goto err;
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158 | 05330448 | aliguori | } |
159 | 05330448 | aliguori | |
160 | 05330448 | aliguori | env->kvm_fd = ret; |
161 | 05330448 | aliguori | env->kvm_state = s; |
162 | 05330448 | aliguori | |
163 | 05330448 | aliguori | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
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164 | 05330448 | aliguori | if (mmap_size < 0) { |
165 | 05330448 | aliguori | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n");
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166 | 05330448 | aliguori | goto err;
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167 | 05330448 | aliguori | } |
168 | 05330448 | aliguori | |
169 | 05330448 | aliguori | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
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170 | 05330448 | aliguori | env->kvm_fd, 0);
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171 | 05330448 | aliguori | if (env->kvm_run == MAP_FAILED) {
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172 | 05330448 | aliguori | ret = -errno; |
173 | 05330448 | aliguori | dprintf("mmap'ing vcpu state failed\n");
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174 | 05330448 | aliguori | goto err;
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175 | 05330448 | aliguori | } |
176 | 05330448 | aliguori | |
177 | 05330448 | aliguori | ret = kvm_arch_init_vcpu(env); |
178 | 05330448 | aliguori | |
179 | 05330448 | aliguori | err:
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180 | 05330448 | aliguori | return ret;
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181 | 05330448 | aliguori | } |
182 | 05330448 | aliguori | |
183 | f5d6f51b | aliguori | int kvm_sync_vcpus(void) |
184 | f5d6f51b | aliguori | { |
185 | f5d6f51b | aliguori | CPUState *env; |
186 | f5d6f51b | aliguori | |
187 | f5d6f51b | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
188 | f5d6f51b | aliguori | int ret;
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189 | f5d6f51b | aliguori | |
190 | f5d6f51b | aliguori | ret = kvm_arch_put_registers(env); |
191 | f5d6f51b | aliguori | if (ret)
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192 | f5d6f51b | aliguori | return ret;
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193 | f5d6f51b | aliguori | } |
194 | f5d6f51b | aliguori | |
195 | f5d6f51b | aliguori | return 0; |
196 | f5d6f51b | aliguori | } |
197 | f5d6f51b | aliguori | |
198 | 5832d1f2 | aliguori | /*
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199 | 5832d1f2 | aliguori | * dirty pages logging control
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200 | 5832d1f2 | aliguori | */
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201 | d3f8d37f | aliguori | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
202 | 4495d6a7 | Jan Kiszka | ram_addr_t size, int flags, int mask) |
203 | 5832d1f2 | aliguori | { |
204 | 5832d1f2 | aliguori | KVMState *s = kvm_state; |
205 | d3f8d37f | aliguori | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
206 | 4495d6a7 | Jan Kiszka | int old_flags;
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207 | 4495d6a7 | Jan Kiszka | |
208 | 5832d1f2 | aliguori | if (mem == NULL) { |
209 | d3f8d37f | aliguori | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
210 | d3f8d37f | aliguori | TARGET_FMT_plx "\n", __func__, phys_addr,
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211 | d3f8d37f | aliguori | phys_addr + size - 1);
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212 | 5832d1f2 | aliguori | return -EINVAL;
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213 | 5832d1f2 | aliguori | } |
214 | 5832d1f2 | aliguori | |
215 | 4495d6a7 | Jan Kiszka | old_flags = mem->flags; |
216 | 5832d1f2 | aliguori | |
217 | 4495d6a7 | Jan Kiszka | flags = (mem->flags & ~mask) | flags; |
218 | 5832d1f2 | aliguori | mem->flags = flags; |
219 | 5832d1f2 | aliguori | |
220 | 4495d6a7 | Jan Kiszka | /* If nothing changed effectively, no need to issue ioctl */
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221 | 4495d6a7 | Jan Kiszka | if (s->migration_log) {
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222 | 4495d6a7 | Jan Kiszka | flags |= KVM_MEM_LOG_DIRTY_PAGES; |
223 | 4495d6a7 | Jan Kiszka | } |
224 | 4495d6a7 | Jan Kiszka | if (flags == old_flags) {
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225 | 4495d6a7 | Jan Kiszka | return 0; |
226 | 4495d6a7 | Jan Kiszka | } |
227 | 4495d6a7 | Jan Kiszka | |
228 | 5832d1f2 | aliguori | return kvm_set_user_memory_region(s, mem);
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229 | 5832d1f2 | aliguori | } |
230 | 5832d1f2 | aliguori | |
231 | d3f8d37f | aliguori | int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
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232 | 5832d1f2 | aliguori | { |
233 | d3f8d37f | aliguori | return kvm_dirty_pages_log_change(phys_addr, size,
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234 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES, |
235 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES); |
236 | 5832d1f2 | aliguori | } |
237 | 5832d1f2 | aliguori | |
238 | d3f8d37f | aliguori | int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
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239 | 5832d1f2 | aliguori | { |
240 | d3f8d37f | aliguori | return kvm_dirty_pages_log_change(phys_addr, size,
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241 | 5832d1f2 | aliguori | 0,
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242 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES); |
243 | 5832d1f2 | aliguori | } |
244 | 5832d1f2 | aliguori | |
245 | 4495d6a7 | Jan Kiszka | int kvm_set_migration_log(int enable) |
246 | 4495d6a7 | Jan Kiszka | { |
247 | 4495d6a7 | Jan Kiszka | KVMState *s = kvm_state; |
248 | 4495d6a7 | Jan Kiszka | KVMSlot *mem; |
249 | 4495d6a7 | Jan Kiszka | int i, err;
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250 | 4495d6a7 | Jan Kiszka | |
251 | 4495d6a7 | Jan Kiszka | s->migration_log = enable; |
252 | 4495d6a7 | Jan Kiszka | |
253 | 4495d6a7 | Jan Kiszka | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
254 | 4495d6a7 | Jan Kiszka | mem = &s->slots[i]; |
255 | 4495d6a7 | Jan Kiszka | |
256 | 4495d6a7 | Jan Kiszka | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
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257 | 4495d6a7 | Jan Kiszka | continue;
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258 | 4495d6a7 | Jan Kiszka | } |
259 | 4495d6a7 | Jan Kiszka | err = kvm_set_user_memory_region(s, mem); |
260 | 4495d6a7 | Jan Kiszka | if (err) {
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261 | 4495d6a7 | Jan Kiszka | return err;
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262 | 4495d6a7 | Jan Kiszka | } |
263 | 4495d6a7 | Jan Kiszka | } |
264 | 4495d6a7 | Jan Kiszka | return 0; |
265 | 4495d6a7 | Jan Kiszka | } |
266 | 4495d6a7 | Jan Kiszka | |
267 | 5832d1f2 | aliguori | /**
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268 | 5832d1f2 | aliguori | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
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269 | 5832d1f2 | aliguori | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
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270 | 5832d1f2 | aliguori | * This means all bits are set to dirty.
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271 | 5832d1f2 | aliguori | *
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272 | d3f8d37f | aliguori | * @start_add: start of logged region.
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273 | 5832d1f2 | aliguori | * @end_addr: end of logged region.
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274 | 5832d1f2 | aliguori | */
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275 | 151f7749 | Jan Kiszka | int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
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276 | 151f7749 | Jan Kiszka | target_phys_addr_t end_addr) |
277 | 5832d1f2 | aliguori | { |
278 | 5832d1f2 | aliguori | KVMState *s = kvm_state; |
279 | 151f7749 | Jan Kiszka | unsigned long size, allocated_size = 0; |
280 | 151f7749 | Jan Kiszka | target_phys_addr_t phys_addr; |
281 | 5832d1f2 | aliguori | ram_addr_t addr; |
282 | 151f7749 | Jan Kiszka | KVMDirtyLog d; |
283 | 151f7749 | Jan Kiszka | KVMSlot *mem; |
284 | 151f7749 | Jan Kiszka | int ret = 0; |
285 | 5832d1f2 | aliguori | |
286 | 151f7749 | Jan Kiszka | d.dirty_bitmap = NULL;
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287 | 151f7749 | Jan Kiszka | while (start_addr < end_addr) {
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288 | 151f7749 | Jan Kiszka | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
289 | 151f7749 | Jan Kiszka | if (mem == NULL) { |
290 | 151f7749 | Jan Kiszka | break;
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291 | 151f7749 | Jan Kiszka | } |
292 | 5832d1f2 | aliguori | |
293 | 151f7749 | Jan Kiszka | size = ((mem->memory_size >> TARGET_PAGE_BITS) + 7) / 8; |
294 | 151f7749 | Jan Kiszka | if (!d.dirty_bitmap) {
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295 | 151f7749 | Jan Kiszka | d.dirty_bitmap = qemu_malloc(size); |
296 | 151f7749 | Jan Kiszka | } else if (size > allocated_size) { |
297 | 151f7749 | Jan Kiszka | d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); |
298 | 151f7749 | Jan Kiszka | } |
299 | 151f7749 | Jan Kiszka | allocated_size = size; |
300 | 151f7749 | Jan Kiszka | memset(d.dirty_bitmap, 0, allocated_size);
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301 | 5832d1f2 | aliguori | |
302 | 151f7749 | Jan Kiszka | d.slot = mem->slot; |
303 | 5832d1f2 | aliguori | |
304 | 151f7749 | Jan Kiszka | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
305 | 151f7749 | Jan Kiszka | dprintf("ioctl failed %d\n", errno);
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306 | 151f7749 | Jan Kiszka | ret = -1;
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307 | 151f7749 | Jan Kiszka | break;
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308 | 151f7749 | Jan Kiszka | } |
309 | 5832d1f2 | aliguori | |
310 | 151f7749 | Jan Kiszka | for (phys_addr = mem->start_addr, addr = mem->phys_offset;
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311 | 151f7749 | Jan Kiszka | phys_addr < mem->start_addr + mem->memory_size; |
312 | 151f7749 | Jan Kiszka | phys_addr += TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
313 | 151f7749 | Jan Kiszka | unsigned long *bitmap = (unsigned long *)d.dirty_bitmap; |
314 | 151f7749 | Jan Kiszka | unsigned nr = (phys_addr - mem->start_addr) >> TARGET_PAGE_BITS;
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315 | 151f7749 | Jan Kiszka | unsigned word = nr / (sizeof(*bitmap) * 8); |
316 | 151f7749 | Jan Kiszka | unsigned bit = nr % (sizeof(*bitmap) * 8); |
317 | 151f7749 | Jan Kiszka | |
318 | 151f7749 | Jan Kiszka | if ((bitmap[word] >> bit) & 1) { |
319 | 151f7749 | Jan Kiszka | cpu_physical_memory_set_dirty(addr); |
320 | 151f7749 | Jan Kiszka | } |
321 | 151f7749 | Jan Kiszka | } |
322 | 151f7749 | Jan Kiszka | start_addr = phys_addr; |
323 | 5832d1f2 | aliguori | } |
324 | 5832d1f2 | aliguori | qemu_free(d.dirty_bitmap); |
325 | 151f7749 | Jan Kiszka | |
326 | 151f7749 | Jan Kiszka | return ret;
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327 | 5832d1f2 | aliguori | } |
328 | 5832d1f2 | aliguori | |
329 | f65ed4c1 | aliguori | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
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330 | f65ed4c1 | aliguori | { |
331 | f65ed4c1 | aliguori | int ret = -ENOSYS;
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332 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
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333 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
334 | f65ed4c1 | aliguori | |
335 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
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336 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_zone zone;
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337 | f65ed4c1 | aliguori | |
338 | f65ed4c1 | aliguori | zone.addr = start; |
339 | f65ed4c1 | aliguori | zone.size = size; |
340 | f65ed4c1 | aliguori | |
341 | f65ed4c1 | aliguori | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
342 | f65ed4c1 | aliguori | } |
343 | f65ed4c1 | aliguori | #endif
|
344 | f65ed4c1 | aliguori | |
345 | f65ed4c1 | aliguori | return ret;
|
346 | f65ed4c1 | aliguori | } |
347 | f65ed4c1 | aliguori | |
348 | f65ed4c1 | aliguori | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
349 | f65ed4c1 | aliguori | { |
350 | f65ed4c1 | aliguori | int ret = -ENOSYS;
|
351 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
352 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
353 | f65ed4c1 | aliguori | |
354 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
|
355 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_zone zone;
|
356 | f65ed4c1 | aliguori | |
357 | f65ed4c1 | aliguori | zone.addr = start; |
358 | f65ed4c1 | aliguori | zone.size = size; |
359 | f65ed4c1 | aliguori | |
360 | f65ed4c1 | aliguori | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
361 | f65ed4c1 | aliguori | } |
362 | f65ed4c1 | aliguori | #endif
|
363 | f65ed4c1 | aliguori | |
364 | f65ed4c1 | aliguori | return ret;
|
365 | f65ed4c1 | aliguori | } |
366 | f65ed4c1 | aliguori | |
367 | ad7b8b33 | Anthony Liguori | int kvm_check_extension(KVMState *s, unsigned int extension) |
368 | ad7b8b33 | Anthony Liguori | { |
369 | ad7b8b33 | Anthony Liguori | int ret;
|
370 | ad7b8b33 | Anthony Liguori | |
371 | ad7b8b33 | Anthony Liguori | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
372 | ad7b8b33 | Anthony Liguori | if (ret < 0) { |
373 | ad7b8b33 | Anthony Liguori | ret = 0;
|
374 | ad7b8b33 | Anthony Liguori | } |
375 | ad7b8b33 | Anthony Liguori | |
376 | ad7b8b33 | Anthony Liguori | return ret;
|
377 | ad7b8b33 | Anthony Liguori | } |
378 | ad7b8b33 | Anthony Liguori | |
379 | 05330448 | aliguori | int kvm_init(int smp_cpus) |
380 | 05330448 | aliguori | { |
381 | 05330448 | aliguori | KVMState *s; |
382 | 05330448 | aliguori | int ret;
|
383 | 05330448 | aliguori | int i;
|
384 | 05330448 | aliguori | |
385 | 9f8fd694 | Mark McLoughlin | if (smp_cpus > 1) { |
386 | 9f8fd694 | Mark McLoughlin | fprintf(stderr, "No SMP KVM support, use '-smp 1'\n");
|
387 | 05330448 | aliguori | return -EINVAL;
|
388 | 9f8fd694 | Mark McLoughlin | } |
389 | 05330448 | aliguori | |
390 | 05330448 | aliguori | s = qemu_mallocz(sizeof(KVMState));
|
391 | 05330448 | aliguori | |
392 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
393 | e22a25c9 | aliguori | TAILQ_INIT(&s->kvm_sw_breakpoints); |
394 | e22a25c9 | aliguori | #endif
|
395 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
396 | 05330448 | aliguori | s->slots[i].slot = i; |
397 | 05330448 | aliguori | |
398 | 05330448 | aliguori | s->vmfd = -1;
|
399 | 05330448 | aliguori | s->fd = open("/dev/kvm", O_RDWR);
|
400 | 05330448 | aliguori | if (s->fd == -1) { |
401 | 05330448 | aliguori | fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
402 | 05330448 | aliguori | ret = -errno; |
403 | 05330448 | aliguori | goto err;
|
404 | 05330448 | aliguori | } |
405 | 05330448 | aliguori | |
406 | 05330448 | aliguori | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
407 | 05330448 | aliguori | if (ret < KVM_API_VERSION) {
|
408 | 05330448 | aliguori | if (ret > 0) |
409 | 05330448 | aliguori | ret = -EINVAL; |
410 | 05330448 | aliguori | fprintf(stderr, "kvm version too old\n");
|
411 | 05330448 | aliguori | goto err;
|
412 | 05330448 | aliguori | } |
413 | 05330448 | aliguori | |
414 | 05330448 | aliguori | if (ret > KVM_API_VERSION) {
|
415 | 05330448 | aliguori | ret = -EINVAL; |
416 | 05330448 | aliguori | fprintf(stderr, "kvm version not supported\n");
|
417 | 05330448 | aliguori | goto err;
|
418 | 05330448 | aliguori | } |
419 | 05330448 | aliguori | |
420 | 05330448 | aliguori | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
421 | 05330448 | aliguori | if (s->vmfd < 0) |
422 | 05330448 | aliguori | goto err;
|
423 | 05330448 | aliguori | |
424 | 05330448 | aliguori | /* initially, KVM allocated its own memory and we had to jump through
|
425 | 05330448 | aliguori | * hooks to make phys_ram_base point to this. Modern versions of KVM
|
426 | 5579c7f3 | pbrook | * just use a user allocated buffer so we can use regular pages
|
427 | 05330448 | aliguori | * unmodified. Make sure we have a sufficiently modern version of KVM.
|
428 | 05330448 | aliguori | */
|
429 | ad7b8b33 | Anthony Liguori | if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) {
|
430 | ad7b8b33 | Anthony Liguori | ret = -EINVAL; |
431 | 05330448 | aliguori | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n");
|
432 | 05330448 | aliguori | goto err;
|
433 | 05330448 | aliguori | } |
434 | 05330448 | aliguori | |
435 | d85dc283 | aliguori | /* There was a nasty bug in < kvm-80 that prevents memory slots from being
|
436 | d85dc283 | aliguori | * destroyed properly. Since we rely on this capability, refuse to work
|
437 | d85dc283 | aliguori | * with any kernel without this capability. */
|
438 | ad7b8b33 | Anthony Liguori | if (!kvm_check_extension(s, KVM_CAP_DESTROY_MEMORY_REGION_WORKS)) {
|
439 | ad7b8b33 | Anthony Liguori | ret = -EINVAL; |
440 | d85dc283 | aliguori | |
441 | d85dc283 | aliguori | fprintf(stderr, |
442 | d85dc283 | aliguori | "KVM kernel module broken (DESTROY_MEMORY_REGION)\n"
|
443 | d85dc283 | aliguori | "Please upgrade to at least kvm-81.\n");
|
444 | d85dc283 | aliguori | goto err;
|
445 | d85dc283 | aliguori | } |
446 | d85dc283 | aliguori | |
447 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
448 | ad7b8b33 | Anthony Liguori | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
449 | ad7b8b33 | Anthony Liguori | #else
|
450 | ad7b8b33 | Anthony Liguori | s->coalesced_mmio = 0;
|
451 | f65ed4c1 | aliguori | #endif
|
452 | f65ed4c1 | aliguori | |
453 | e69917e2 | Jan Kiszka | s->broken_set_mem_region = 1;
|
454 | e69917e2 | Jan Kiszka | #ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
|
455 | e69917e2 | Jan Kiszka | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
456 | e69917e2 | Jan Kiszka | if (ret > 0) { |
457 | e69917e2 | Jan Kiszka | s->broken_set_mem_region = 0;
|
458 | e69917e2 | Jan Kiszka | } |
459 | e69917e2 | Jan Kiszka | #endif
|
460 | e69917e2 | Jan Kiszka | |
461 | 05330448 | aliguori | ret = kvm_arch_init(s, smp_cpus); |
462 | 05330448 | aliguori | if (ret < 0) |
463 | 05330448 | aliguori | goto err;
|
464 | 05330448 | aliguori | |
465 | 05330448 | aliguori | kvm_state = s; |
466 | 05330448 | aliguori | |
467 | 05330448 | aliguori | return 0; |
468 | 05330448 | aliguori | |
469 | 05330448 | aliguori | err:
|
470 | 05330448 | aliguori | if (s) {
|
471 | 05330448 | aliguori | if (s->vmfd != -1) |
472 | 05330448 | aliguori | close(s->vmfd); |
473 | 05330448 | aliguori | if (s->fd != -1) |
474 | 05330448 | aliguori | close(s->fd); |
475 | 05330448 | aliguori | } |
476 | 05330448 | aliguori | qemu_free(s); |
477 | 05330448 | aliguori | |
478 | 05330448 | aliguori | return ret;
|
479 | 05330448 | aliguori | } |
480 | 05330448 | aliguori | |
481 | 05330448 | aliguori | static int kvm_handle_io(CPUState *env, uint16_t port, void *data, |
482 | 05330448 | aliguori | int direction, int size, uint32_t count) |
483 | 05330448 | aliguori | { |
484 | 05330448 | aliguori | int i;
|
485 | 05330448 | aliguori | uint8_t *ptr = data; |
486 | 05330448 | aliguori | |
487 | 05330448 | aliguori | for (i = 0; i < count; i++) { |
488 | 05330448 | aliguori | if (direction == KVM_EXIT_IO_IN) {
|
489 | 05330448 | aliguori | switch (size) {
|
490 | 05330448 | aliguori | case 1: |
491 | 05330448 | aliguori | stb_p(ptr, cpu_inb(env, port)); |
492 | 05330448 | aliguori | break;
|
493 | 05330448 | aliguori | case 2: |
494 | 05330448 | aliguori | stw_p(ptr, cpu_inw(env, port)); |
495 | 05330448 | aliguori | break;
|
496 | 05330448 | aliguori | case 4: |
497 | 05330448 | aliguori | stl_p(ptr, cpu_inl(env, port)); |
498 | 05330448 | aliguori | break;
|
499 | 05330448 | aliguori | } |
500 | 05330448 | aliguori | } else {
|
501 | 05330448 | aliguori | switch (size) {
|
502 | 05330448 | aliguori | case 1: |
503 | 05330448 | aliguori | cpu_outb(env, port, ldub_p(ptr)); |
504 | 05330448 | aliguori | break;
|
505 | 05330448 | aliguori | case 2: |
506 | 05330448 | aliguori | cpu_outw(env, port, lduw_p(ptr)); |
507 | 05330448 | aliguori | break;
|
508 | 05330448 | aliguori | case 4: |
509 | 05330448 | aliguori | cpu_outl(env, port, ldl_p(ptr)); |
510 | 05330448 | aliguori | break;
|
511 | 05330448 | aliguori | } |
512 | 05330448 | aliguori | } |
513 | 05330448 | aliguori | |
514 | 05330448 | aliguori | ptr += size; |
515 | 05330448 | aliguori | } |
516 | 05330448 | aliguori | |
517 | 05330448 | aliguori | return 1; |
518 | 05330448 | aliguori | } |
519 | 05330448 | aliguori | |
520 | f65ed4c1 | aliguori | static void kvm_run_coalesced_mmio(CPUState *env, struct kvm_run *run) |
521 | f65ed4c1 | aliguori | { |
522 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
523 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
524 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
|
525 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_ring *ring;
|
526 | f65ed4c1 | aliguori | |
527 | f65ed4c1 | aliguori | ring = (void *)run + (s->coalesced_mmio * TARGET_PAGE_SIZE);
|
528 | f65ed4c1 | aliguori | while (ring->first != ring->last) {
|
529 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio *ent;
|
530 | f65ed4c1 | aliguori | |
531 | f65ed4c1 | aliguori | ent = &ring->coalesced_mmio[ring->first]; |
532 | f65ed4c1 | aliguori | |
533 | f65ed4c1 | aliguori | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
534 | f65ed4c1 | aliguori | /* FIXME smp_wmb() */
|
535 | f65ed4c1 | aliguori | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
536 | f65ed4c1 | aliguori | } |
537 | f65ed4c1 | aliguori | } |
538 | f65ed4c1 | aliguori | #endif
|
539 | f65ed4c1 | aliguori | } |
540 | f65ed4c1 | aliguori | |
541 | 05330448 | aliguori | int kvm_cpu_exec(CPUState *env)
|
542 | 05330448 | aliguori | { |
543 | 05330448 | aliguori | struct kvm_run *run = env->kvm_run;
|
544 | 05330448 | aliguori | int ret;
|
545 | 05330448 | aliguori | |
546 | 05330448 | aliguori | dprintf("kvm_cpu_exec()\n");
|
547 | 05330448 | aliguori | |
548 | 05330448 | aliguori | do {
|
549 | 05330448 | aliguori | kvm_arch_pre_run(env, run); |
550 | 05330448 | aliguori | |
551 | be214e6c | aurel32 | if (env->exit_request) {
|
552 | 05330448 | aliguori | dprintf("interrupt exit requested\n");
|
553 | 05330448 | aliguori | ret = 0;
|
554 | 05330448 | aliguori | break;
|
555 | 05330448 | aliguori | } |
556 | 05330448 | aliguori | |
557 | 05330448 | aliguori | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
|
558 | 05330448 | aliguori | kvm_arch_post_run(env, run); |
559 | 05330448 | aliguori | |
560 | 05330448 | aliguori | if (ret == -EINTR || ret == -EAGAIN) {
|
561 | 05330448 | aliguori | dprintf("io window exit\n");
|
562 | 05330448 | aliguori | ret = 0;
|
563 | 05330448 | aliguori | break;
|
564 | 05330448 | aliguori | } |
565 | 05330448 | aliguori | |
566 | 05330448 | aliguori | if (ret < 0) { |
567 | 05330448 | aliguori | dprintf("kvm run failed %s\n", strerror(-ret));
|
568 | 05330448 | aliguori | abort(); |
569 | 05330448 | aliguori | } |
570 | 05330448 | aliguori | |
571 | f65ed4c1 | aliguori | kvm_run_coalesced_mmio(env, run); |
572 | f65ed4c1 | aliguori | |
573 | 05330448 | aliguori | ret = 0; /* exit loop */ |
574 | 05330448 | aliguori | switch (run->exit_reason) {
|
575 | 05330448 | aliguori | case KVM_EXIT_IO:
|
576 | 05330448 | aliguori | dprintf("handle_io\n");
|
577 | 05330448 | aliguori | ret = kvm_handle_io(env, run->io.port, |
578 | 05330448 | aliguori | (uint8_t *)run + run->io.data_offset, |
579 | 05330448 | aliguori | run->io.direction, |
580 | 05330448 | aliguori | run->io.size, |
581 | 05330448 | aliguori | run->io.count); |
582 | 05330448 | aliguori | break;
|
583 | 05330448 | aliguori | case KVM_EXIT_MMIO:
|
584 | 05330448 | aliguori | dprintf("handle_mmio\n");
|
585 | 05330448 | aliguori | cpu_physical_memory_rw(run->mmio.phys_addr, |
586 | 05330448 | aliguori | run->mmio.data, |
587 | 05330448 | aliguori | run->mmio.len, |
588 | 05330448 | aliguori | run->mmio.is_write); |
589 | 05330448 | aliguori | ret = 1;
|
590 | 05330448 | aliguori | break;
|
591 | 05330448 | aliguori | case KVM_EXIT_IRQ_WINDOW_OPEN:
|
592 | 05330448 | aliguori | dprintf("irq_window_open\n");
|
593 | 05330448 | aliguori | break;
|
594 | 05330448 | aliguori | case KVM_EXIT_SHUTDOWN:
|
595 | 05330448 | aliguori | dprintf("shutdown\n");
|
596 | 05330448 | aliguori | qemu_system_reset_request(); |
597 | 05330448 | aliguori | ret = 1;
|
598 | 05330448 | aliguori | break;
|
599 | 05330448 | aliguori | case KVM_EXIT_UNKNOWN:
|
600 | 05330448 | aliguori | dprintf("kvm_exit_unknown\n");
|
601 | 05330448 | aliguori | break;
|
602 | 05330448 | aliguori | case KVM_EXIT_FAIL_ENTRY:
|
603 | 05330448 | aliguori | dprintf("kvm_exit_fail_entry\n");
|
604 | 05330448 | aliguori | break;
|
605 | 05330448 | aliguori | case KVM_EXIT_EXCEPTION:
|
606 | 05330448 | aliguori | dprintf("kvm_exit_exception\n");
|
607 | 05330448 | aliguori | break;
|
608 | 05330448 | aliguori | case KVM_EXIT_DEBUG:
|
609 | 05330448 | aliguori | dprintf("kvm_exit_debug\n");
|
610 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
611 | e22a25c9 | aliguori | if (kvm_arch_debug(&run->debug.arch)) {
|
612 | e22a25c9 | aliguori | gdb_set_stop_cpu(env); |
613 | e22a25c9 | aliguori | vm_stop(EXCP_DEBUG); |
614 | e22a25c9 | aliguori | env->exception_index = EXCP_DEBUG; |
615 | e22a25c9 | aliguori | return 0; |
616 | e22a25c9 | aliguori | } |
617 | e22a25c9 | aliguori | /* re-enter, this exception was guest-internal */
|
618 | e22a25c9 | aliguori | ret = 1;
|
619 | e22a25c9 | aliguori | #endif /* KVM_CAP_SET_GUEST_DEBUG */ |
620 | 05330448 | aliguori | break;
|
621 | 05330448 | aliguori | default:
|
622 | 05330448 | aliguori | dprintf("kvm_arch_handle_exit\n");
|
623 | 05330448 | aliguori | ret = kvm_arch_handle_exit(env, run); |
624 | 05330448 | aliguori | break;
|
625 | 05330448 | aliguori | } |
626 | 05330448 | aliguori | } while (ret > 0); |
627 | 05330448 | aliguori | |
628 | be214e6c | aurel32 | if (env->exit_request) {
|
629 | be214e6c | aurel32 | env->exit_request = 0;
|
630 | becfc390 | aliguori | env->exception_index = EXCP_INTERRUPT; |
631 | becfc390 | aliguori | } |
632 | becfc390 | aliguori | |
633 | 05330448 | aliguori | return ret;
|
634 | 05330448 | aliguori | } |
635 | 05330448 | aliguori | |
636 | 05330448 | aliguori | void kvm_set_phys_mem(target_phys_addr_t start_addr,
|
637 | 05330448 | aliguori | ram_addr_t size, |
638 | 05330448 | aliguori | ram_addr_t phys_offset) |
639 | 05330448 | aliguori | { |
640 | 05330448 | aliguori | KVMState *s = kvm_state; |
641 | 05330448 | aliguori | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
642 | 6152e2ae | aliguori | KVMSlot *mem, old; |
643 | 6152e2ae | aliguori | int err;
|
644 | 05330448 | aliguori | |
645 | d3f8d37f | aliguori | if (start_addr & ~TARGET_PAGE_MASK) {
|
646 | e6f4afe0 | Jan Kiszka | if (flags >= IO_MEM_UNASSIGNED) {
|
647 | e6f4afe0 | Jan Kiszka | if (!kvm_lookup_overlapping_slot(s, start_addr,
|
648 | e6f4afe0 | Jan Kiszka | start_addr + size)) { |
649 | e6f4afe0 | Jan Kiszka | return;
|
650 | e6f4afe0 | Jan Kiszka | } |
651 | e6f4afe0 | Jan Kiszka | fprintf(stderr, "Unaligned split of a KVM memory slot\n");
|
652 | e6f4afe0 | Jan Kiszka | } else {
|
653 | e6f4afe0 | Jan Kiszka | fprintf(stderr, "Only page-aligned memory slots supported\n");
|
654 | e6f4afe0 | Jan Kiszka | } |
655 | d3f8d37f | aliguori | abort(); |
656 | d3f8d37f | aliguori | } |
657 | d3f8d37f | aliguori | |
658 | 05330448 | aliguori | /* KVM does not support read-only slots */
|
659 | 05330448 | aliguori | phys_offset &= ~IO_MEM_ROM; |
660 | 05330448 | aliguori | |
661 | 6152e2ae | aliguori | while (1) { |
662 | 6152e2ae | aliguori | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
663 | 6152e2ae | aliguori | if (!mem) {
|
664 | 6152e2ae | aliguori | break;
|
665 | 6152e2ae | aliguori | } |
666 | 62d60e8c | aliguori | |
667 | 6152e2ae | aliguori | if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
|
668 | 6152e2ae | aliguori | (start_addr + size <= mem->start_addr + mem->memory_size) && |
669 | 6152e2ae | aliguori | (phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
670 | 6152e2ae | aliguori | /* The new slot fits into the existing one and comes with
|
671 | 6152e2ae | aliguori | * identical parameters - nothing to be done. */
|
672 | 05330448 | aliguori | return;
|
673 | 6152e2ae | aliguori | } |
674 | 6152e2ae | aliguori | |
675 | 6152e2ae | aliguori | old = *mem; |
676 | 6152e2ae | aliguori | |
677 | 6152e2ae | aliguori | /* unregister the overlapping slot */
|
678 | 6152e2ae | aliguori | mem->memory_size = 0;
|
679 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
680 | 6152e2ae | aliguori | if (err) {
|
681 | 6152e2ae | aliguori | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
682 | 6152e2ae | aliguori | __func__, strerror(-err)); |
683 | 62d60e8c | aliguori | abort(); |
684 | 62d60e8c | aliguori | } |
685 | 6152e2ae | aliguori | |
686 | 6152e2ae | aliguori | /* Workaround for older KVM versions: we can't join slots, even not by
|
687 | 6152e2ae | aliguori | * unregistering the previous ones and then registering the larger
|
688 | 6152e2ae | aliguori | * slot. We have to maintain the existing fragmentation. Sigh.
|
689 | 6152e2ae | aliguori | *
|
690 | 6152e2ae | aliguori | * This workaround assumes that the new slot starts at the same
|
691 | 6152e2ae | aliguori | * address as the first existing one. If not or if some overlapping
|
692 | 6152e2ae | aliguori | * slot comes around later, we will fail (not seen in practice so far)
|
693 | 6152e2ae | aliguori | * - and actually require a recent KVM version. */
|
694 | e69917e2 | Jan Kiszka | if (s->broken_set_mem_region &&
|
695 | e69917e2 | Jan Kiszka | old.start_addr == start_addr && old.memory_size < size && |
696 | 6152e2ae | aliguori | flags < IO_MEM_UNASSIGNED) { |
697 | 6152e2ae | aliguori | mem = kvm_alloc_slot(s); |
698 | 6152e2ae | aliguori | mem->memory_size = old.memory_size; |
699 | 6152e2ae | aliguori | mem->start_addr = old.start_addr; |
700 | 6152e2ae | aliguori | mem->phys_offset = old.phys_offset; |
701 | 6152e2ae | aliguori | mem->flags = 0;
|
702 | 6152e2ae | aliguori | |
703 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
704 | 6152e2ae | aliguori | if (err) {
|
705 | 6152e2ae | aliguori | fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
706 | 6152e2ae | aliguori | strerror(-err)); |
707 | 6152e2ae | aliguori | abort(); |
708 | 6152e2ae | aliguori | } |
709 | 6152e2ae | aliguori | |
710 | 6152e2ae | aliguori | start_addr += old.memory_size; |
711 | 6152e2ae | aliguori | phys_offset += old.memory_size; |
712 | 6152e2ae | aliguori | size -= old.memory_size; |
713 | 6152e2ae | aliguori | continue;
|
714 | 6152e2ae | aliguori | } |
715 | 6152e2ae | aliguori | |
716 | 6152e2ae | aliguori | /* register prefix slot */
|
717 | 6152e2ae | aliguori | if (old.start_addr < start_addr) {
|
718 | 6152e2ae | aliguori | mem = kvm_alloc_slot(s); |
719 | 6152e2ae | aliguori | mem->memory_size = start_addr - old.start_addr; |
720 | 6152e2ae | aliguori | mem->start_addr = old.start_addr; |
721 | 6152e2ae | aliguori | mem->phys_offset = old.phys_offset; |
722 | 6152e2ae | aliguori | mem->flags = 0;
|
723 | 6152e2ae | aliguori | |
724 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
725 | 6152e2ae | aliguori | if (err) {
|
726 | 6152e2ae | aliguori | fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
727 | 6152e2ae | aliguori | __func__, strerror(-err)); |
728 | 6152e2ae | aliguori | abort(); |
729 | 6152e2ae | aliguori | } |
730 | 6152e2ae | aliguori | } |
731 | 6152e2ae | aliguori | |
732 | 6152e2ae | aliguori | /* register suffix slot */
|
733 | 6152e2ae | aliguori | if (old.start_addr + old.memory_size > start_addr + size) {
|
734 | 6152e2ae | aliguori | ram_addr_t size_delta; |
735 | 6152e2ae | aliguori | |
736 | 6152e2ae | aliguori | mem = kvm_alloc_slot(s); |
737 | 6152e2ae | aliguori | mem->start_addr = start_addr + size; |
738 | 6152e2ae | aliguori | size_delta = mem->start_addr - old.start_addr; |
739 | 6152e2ae | aliguori | mem->memory_size = old.memory_size - size_delta; |
740 | 6152e2ae | aliguori | mem->phys_offset = old.phys_offset + size_delta; |
741 | 6152e2ae | aliguori | mem->flags = 0;
|
742 | 6152e2ae | aliguori | |
743 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
744 | 6152e2ae | aliguori | if (err) {
|
745 | 6152e2ae | aliguori | fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
746 | 6152e2ae | aliguori | __func__, strerror(-err)); |
747 | 6152e2ae | aliguori | abort(); |
748 | 6152e2ae | aliguori | } |
749 | 6152e2ae | aliguori | } |
750 | 05330448 | aliguori | } |
751 | 6152e2ae | aliguori | |
752 | 6152e2ae | aliguori | /* in case the KVM bug workaround already "consumed" the new slot */
|
753 | 6152e2ae | aliguori | if (!size)
|
754 | 6152e2ae | aliguori | return;
|
755 | 6152e2ae | aliguori | |
756 | 05330448 | aliguori | /* KVM does not need to know about this memory */
|
757 | 05330448 | aliguori | if (flags >= IO_MEM_UNASSIGNED)
|
758 | 05330448 | aliguori | return;
|
759 | 05330448 | aliguori | |
760 | 05330448 | aliguori | mem = kvm_alloc_slot(s); |
761 | 05330448 | aliguori | mem->memory_size = size; |
762 | 34fc643f | aliguori | mem->start_addr = start_addr; |
763 | 34fc643f | aliguori | mem->phys_offset = phys_offset; |
764 | 05330448 | aliguori | mem->flags = 0;
|
765 | 05330448 | aliguori | |
766 | 6152e2ae | aliguori | err = kvm_set_user_memory_region(s, mem); |
767 | 6152e2ae | aliguori | if (err) {
|
768 | 6152e2ae | aliguori | fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
769 | 6152e2ae | aliguori | strerror(-err)); |
770 | 6152e2ae | aliguori | abort(); |
771 | 6152e2ae | aliguori | } |
772 | 05330448 | aliguori | } |
773 | 05330448 | aliguori | |
774 | 984b5181 | aliguori | int kvm_ioctl(KVMState *s, int type, ...) |
775 | 05330448 | aliguori | { |
776 | 05330448 | aliguori | int ret;
|
777 | 984b5181 | aliguori | void *arg;
|
778 | 984b5181 | aliguori | va_list ap; |
779 | 05330448 | aliguori | |
780 | 984b5181 | aliguori | va_start(ap, type); |
781 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
782 | 984b5181 | aliguori | va_end(ap); |
783 | 984b5181 | aliguori | |
784 | 984b5181 | aliguori | ret = ioctl(s->fd, type, arg); |
785 | 05330448 | aliguori | if (ret == -1) |
786 | 05330448 | aliguori | ret = -errno; |
787 | 05330448 | aliguori | |
788 | 05330448 | aliguori | return ret;
|
789 | 05330448 | aliguori | } |
790 | 05330448 | aliguori | |
791 | 984b5181 | aliguori | int kvm_vm_ioctl(KVMState *s, int type, ...) |
792 | 05330448 | aliguori | { |
793 | 05330448 | aliguori | int ret;
|
794 | 984b5181 | aliguori | void *arg;
|
795 | 984b5181 | aliguori | va_list ap; |
796 | 984b5181 | aliguori | |
797 | 984b5181 | aliguori | va_start(ap, type); |
798 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
799 | 984b5181 | aliguori | va_end(ap); |
800 | 05330448 | aliguori | |
801 | 984b5181 | aliguori | ret = ioctl(s->vmfd, type, arg); |
802 | 05330448 | aliguori | if (ret == -1) |
803 | 05330448 | aliguori | ret = -errno; |
804 | 05330448 | aliguori | |
805 | 05330448 | aliguori | return ret;
|
806 | 05330448 | aliguori | } |
807 | 05330448 | aliguori | |
808 | 984b5181 | aliguori | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
809 | 05330448 | aliguori | { |
810 | 05330448 | aliguori | int ret;
|
811 | 984b5181 | aliguori | void *arg;
|
812 | 984b5181 | aliguori | va_list ap; |
813 | 984b5181 | aliguori | |
814 | 984b5181 | aliguori | va_start(ap, type); |
815 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
816 | 984b5181 | aliguori | va_end(ap); |
817 | 05330448 | aliguori | |
818 | 984b5181 | aliguori | ret = ioctl(env->kvm_fd, type, arg); |
819 | 05330448 | aliguori | if (ret == -1) |
820 | 05330448 | aliguori | ret = -errno; |
821 | 05330448 | aliguori | |
822 | 05330448 | aliguori | return ret;
|
823 | 05330448 | aliguori | } |
824 | bd322087 | aliguori | |
825 | bd322087 | aliguori | int kvm_has_sync_mmu(void) |
826 | bd322087 | aliguori | { |
827 | a9c11522 | aurel32 | #ifdef KVM_CAP_SYNC_MMU
|
828 | bd322087 | aliguori | KVMState *s = kvm_state; |
829 | bd322087 | aliguori | |
830 | ad7b8b33 | Anthony Liguori | return kvm_check_extension(s, KVM_CAP_SYNC_MMU);
|
831 | ad7b8b33 | Anthony Liguori | #else
|
832 | bd322087 | aliguori | return 0; |
833 | ad7b8b33 | Anthony Liguori | #endif
|
834 | bd322087 | aliguori | } |
835 | e22a25c9 | aliguori | |
836 | 6f0437e8 | Jan Kiszka | void kvm_setup_guest_memory(void *start, size_t size) |
837 | 6f0437e8 | Jan Kiszka | { |
838 | 6f0437e8 | Jan Kiszka | if (!kvm_has_sync_mmu()) {
|
839 | 6f0437e8 | Jan Kiszka | #ifdef MADV_DONTFORK
|
840 | 6f0437e8 | Jan Kiszka | int ret = madvise(start, size, MADV_DONTFORK);
|
841 | 6f0437e8 | Jan Kiszka | |
842 | 6f0437e8 | Jan Kiszka | if (ret) {
|
843 | 6f0437e8 | Jan Kiszka | perror("madvice");
|
844 | 6f0437e8 | Jan Kiszka | exit(1);
|
845 | 6f0437e8 | Jan Kiszka | } |
846 | 6f0437e8 | Jan Kiszka | #else
|
847 | 6f0437e8 | Jan Kiszka | fprintf(stderr, |
848 | 6f0437e8 | Jan Kiszka | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
849 | 6f0437e8 | Jan Kiszka | exit(1);
|
850 | 6f0437e8 | Jan Kiszka | #endif
|
851 | 6f0437e8 | Jan Kiszka | } |
852 | 6f0437e8 | Jan Kiszka | } |
853 | 6f0437e8 | Jan Kiszka | |
854 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
855 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
|
856 | e22a25c9 | aliguori | target_ulong pc) |
857 | e22a25c9 | aliguori | { |
858 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
859 | e22a25c9 | aliguori | |
860 | e22a25c9 | aliguori | TAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
861 | e22a25c9 | aliguori | if (bp->pc == pc)
|
862 | e22a25c9 | aliguori | return bp;
|
863 | e22a25c9 | aliguori | } |
864 | e22a25c9 | aliguori | return NULL; |
865 | e22a25c9 | aliguori | } |
866 | e22a25c9 | aliguori | |
867 | e22a25c9 | aliguori | int kvm_sw_breakpoints_active(CPUState *env)
|
868 | e22a25c9 | aliguori | { |
869 | e22a25c9 | aliguori | return !TAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
|
870 | e22a25c9 | aliguori | } |
871 | e22a25c9 | aliguori | |
872 | e22a25c9 | aliguori | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
873 | e22a25c9 | aliguori | { |
874 | e22a25c9 | aliguori | struct kvm_guest_debug dbg;
|
875 | e22a25c9 | aliguori | |
876 | e22a25c9 | aliguori | dbg.control = 0;
|
877 | e22a25c9 | aliguori | if (env->singlestep_enabled)
|
878 | e22a25c9 | aliguori | dbg.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
879 | e22a25c9 | aliguori | |
880 | e22a25c9 | aliguori | kvm_arch_update_guest_debug(env, &dbg); |
881 | e22a25c9 | aliguori | dbg.control |= reinject_trap; |
882 | e22a25c9 | aliguori | |
883 | e22a25c9 | aliguori | return kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg);
|
884 | e22a25c9 | aliguori | } |
885 | e22a25c9 | aliguori | |
886 | e22a25c9 | aliguori | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
887 | e22a25c9 | aliguori | target_ulong len, int type)
|
888 | e22a25c9 | aliguori | { |
889 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
890 | e22a25c9 | aliguori | CPUState *env; |
891 | e22a25c9 | aliguori | int err;
|
892 | e22a25c9 | aliguori | |
893 | e22a25c9 | aliguori | if (type == GDB_BREAKPOINT_SW) {
|
894 | e22a25c9 | aliguori | bp = kvm_find_sw_breakpoint(current_env, addr); |
895 | e22a25c9 | aliguori | if (bp) {
|
896 | e22a25c9 | aliguori | bp->use_count++; |
897 | e22a25c9 | aliguori | return 0; |
898 | e22a25c9 | aliguori | } |
899 | e22a25c9 | aliguori | |
900 | e22a25c9 | aliguori | bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
901 | e22a25c9 | aliguori | if (!bp)
|
902 | e22a25c9 | aliguori | return -ENOMEM;
|
903 | e22a25c9 | aliguori | |
904 | e22a25c9 | aliguori | bp->pc = addr; |
905 | e22a25c9 | aliguori | bp->use_count = 1;
|
906 | e22a25c9 | aliguori | err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
907 | e22a25c9 | aliguori | if (err) {
|
908 | e22a25c9 | aliguori | free(bp); |
909 | e22a25c9 | aliguori | return err;
|
910 | e22a25c9 | aliguori | } |
911 | e22a25c9 | aliguori | |
912 | e22a25c9 | aliguori | TAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
913 | e22a25c9 | aliguori | bp, entry); |
914 | e22a25c9 | aliguori | } else {
|
915 | e22a25c9 | aliguori | err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
916 | e22a25c9 | aliguori | if (err)
|
917 | e22a25c9 | aliguori | return err;
|
918 | e22a25c9 | aliguori | } |
919 | e22a25c9 | aliguori | |
920 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
921 | e22a25c9 | aliguori | err = kvm_update_guest_debug(env, 0);
|
922 | e22a25c9 | aliguori | if (err)
|
923 | e22a25c9 | aliguori | return err;
|
924 | e22a25c9 | aliguori | } |
925 | e22a25c9 | aliguori | return 0; |
926 | e22a25c9 | aliguori | } |
927 | e22a25c9 | aliguori | |
928 | e22a25c9 | aliguori | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
929 | e22a25c9 | aliguori | target_ulong len, int type)
|
930 | e22a25c9 | aliguori | { |
931 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
932 | e22a25c9 | aliguori | CPUState *env; |
933 | e22a25c9 | aliguori | int err;
|
934 | e22a25c9 | aliguori | |
935 | e22a25c9 | aliguori | if (type == GDB_BREAKPOINT_SW) {
|
936 | e22a25c9 | aliguori | bp = kvm_find_sw_breakpoint(current_env, addr); |
937 | e22a25c9 | aliguori | if (!bp)
|
938 | e22a25c9 | aliguori | return -ENOENT;
|
939 | e22a25c9 | aliguori | |
940 | e22a25c9 | aliguori | if (bp->use_count > 1) { |
941 | e22a25c9 | aliguori | bp->use_count--; |
942 | e22a25c9 | aliguori | return 0; |
943 | e22a25c9 | aliguori | } |
944 | e22a25c9 | aliguori | |
945 | e22a25c9 | aliguori | err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
946 | e22a25c9 | aliguori | if (err)
|
947 | e22a25c9 | aliguori | return err;
|
948 | e22a25c9 | aliguori | |
949 | e22a25c9 | aliguori | TAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
950 | e22a25c9 | aliguori | qemu_free(bp); |
951 | e22a25c9 | aliguori | } else {
|
952 | e22a25c9 | aliguori | err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
953 | e22a25c9 | aliguori | if (err)
|
954 | e22a25c9 | aliguori | return err;
|
955 | e22a25c9 | aliguori | } |
956 | e22a25c9 | aliguori | |
957 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
958 | e22a25c9 | aliguori | err = kvm_update_guest_debug(env, 0);
|
959 | e22a25c9 | aliguori | if (err)
|
960 | e22a25c9 | aliguori | return err;
|
961 | e22a25c9 | aliguori | } |
962 | e22a25c9 | aliguori | return 0; |
963 | e22a25c9 | aliguori | } |
964 | e22a25c9 | aliguori | |
965 | e22a25c9 | aliguori | void kvm_remove_all_breakpoints(CPUState *current_env)
|
966 | e22a25c9 | aliguori | { |
967 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp, *next;
|
968 | e22a25c9 | aliguori | KVMState *s = current_env->kvm_state; |
969 | e22a25c9 | aliguori | CPUState *env; |
970 | e22a25c9 | aliguori | |
971 | e22a25c9 | aliguori | TAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
972 | e22a25c9 | aliguori | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
973 | e22a25c9 | aliguori | /* Try harder to find a CPU that currently sees the breakpoint. */
|
974 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
975 | e22a25c9 | aliguori | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) |
976 | e22a25c9 | aliguori | break;
|
977 | e22a25c9 | aliguori | } |
978 | e22a25c9 | aliguori | } |
979 | e22a25c9 | aliguori | } |
980 | e22a25c9 | aliguori | kvm_arch_remove_all_hw_breakpoints(); |
981 | e22a25c9 | aliguori | |
982 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) |
983 | e22a25c9 | aliguori | kvm_update_guest_debug(env, 0);
|
984 | e22a25c9 | aliguori | } |
985 | e22a25c9 | aliguori | |
986 | e22a25c9 | aliguori | #else /* !KVM_CAP_SET_GUEST_DEBUG */ |
987 | e22a25c9 | aliguori | |
988 | e22a25c9 | aliguori | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
989 | e22a25c9 | aliguori | { |
990 | e22a25c9 | aliguori | return -EINVAL;
|
991 | e22a25c9 | aliguori | } |
992 | e22a25c9 | aliguori | |
993 | e22a25c9 | aliguori | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
994 | e22a25c9 | aliguori | target_ulong len, int type)
|
995 | e22a25c9 | aliguori | { |
996 | e22a25c9 | aliguori | return -EINVAL;
|
997 | e22a25c9 | aliguori | } |
998 | e22a25c9 | aliguori | |
999 | e22a25c9 | aliguori | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1000 | e22a25c9 | aliguori | target_ulong len, int type)
|
1001 | e22a25c9 | aliguori | { |
1002 | e22a25c9 | aliguori | return -EINVAL;
|
1003 | e22a25c9 | aliguori | } |
1004 | e22a25c9 | aliguori | |
1005 | e22a25c9 | aliguori | void kvm_remove_all_breakpoints(CPUState *current_env)
|
1006 | e22a25c9 | aliguori | { |
1007 | e22a25c9 | aliguori | } |
1008 | e22a25c9 | aliguori | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ |