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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 | 85199474 | Marcelo Tosatti | #include "qemu-barrier.h" |
25 | 05330448 | aliguori | #include "sysemu.h" |
26 | d33a1810 | Jan Kiszka | #include "hw/hw.h" |
27 | e22a25c9 | aliguori | #include "gdbstub.h" |
28 | 05330448 | aliguori | #include "kvm.h" |
29 | 05330448 | aliguori | |
30 | f65ed4c1 | aliguori | /* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
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31 | f65ed4c1 | aliguori | #define PAGE_SIZE TARGET_PAGE_SIZE
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32 | f65ed4c1 | aliguori | |
33 | 05330448 | aliguori | //#define DEBUG_KVM
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34 | 05330448 | aliguori | |
35 | 05330448 | aliguori | #ifdef DEBUG_KVM
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36 | 05330448 | aliguori | #define dprintf(fmt, ...) \
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37 | 05330448 | aliguori | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
38 | 05330448 | aliguori | #else
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39 | 05330448 | aliguori | #define dprintf(fmt, ...) \
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40 | 05330448 | aliguori | do { } while (0) |
41 | 05330448 | aliguori | #endif
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42 | 05330448 | aliguori | |
43 | 34fc643f | aliguori | typedef struct KVMSlot |
44 | 34fc643f | aliguori | { |
45 | c227f099 | Anthony Liguori | target_phys_addr_t start_addr; |
46 | c227f099 | Anthony Liguori | ram_addr_t memory_size; |
47 | c227f099 | Anthony Liguori | ram_addr_t phys_offset; |
48 | 34fc643f | aliguori | int slot;
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49 | 34fc643f | aliguori | int flags;
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50 | 34fc643f | aliguori | } KVMSlot; |
51 | 05330448 | aliguori | |
52 | 5832d1f2 | aliguori | typedef struct kvm_dirty_log KVMDirtyLog; |
53 | 5832d1f2 | aliguori | |
54 | 05330448 | aliguori | int kvm_allowed = 0; |
55 | 05330448 | aliguori | |
56 | 05330448 | aliguori | struct KVMState
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57 | 05330448 | aliguori | { |
58 | 05330448 | aliguori | KVMSlot slots[32];
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59 | 05330448 | aliguori | int fd;
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60 | 05330448 | aliguori | int vmfd;
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61 | f65ed4c1 | aliguori | int coalesced_mmio;
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62 | 62a2744c | Sheng Yang | #ifdef KVM_CAP_COALESCED_MMIO
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63 | 62a2744c | Sheng Yang | struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
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64 | 62a2744c | Sheng Yang | #endif
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65 | e69917e2 | Jan Kiszka | int broken_set_mem_region;
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66 | 4495d6a7 | Jan Kiszka | int migration_log;
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67 | a0fb002c | Jan Kiszka | int vcpu_events;
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68 | b0b1d690 | Jan Kiszka | int robust_singlestep;
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69 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
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70 | e22a25c9 | aliguori | struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
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71 | e22a25c9 | aliguori | #endif
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72 | 6f725c13 | Glauber Costa | int irqchip_in_kernel;
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73 | 6f725c13 | Glauber Costa | int pit_in_kernel;
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74 | 05330448 | aliguori | }; |
75 | 05330448 | aliguori | |
76 | 05330448 | aliguori | static KVMState *kvm_state;
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77 | 05330448 | aliguori | |
78 | 05330448 | aliguori | static KVMSlot *kvm_alloc_slot(KVMState *s)
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79 | 05330448 | aliguori | { |
80 | 05330448 | aliguori | int i;
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81 | 05330448 | aliguori | |
82 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
83 | 62d60e8c | aliguori | /* KVM private memory slots */
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84 | 62d60e8c | aliguori | if (i >= 8 && i < 12) |
85 | 62d60e8c | aliguori | continue;
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86 | 05330448 | aliguori | if (s->slots[i].memory_size == 0) |
87 | 05330448 | aliguori | return &s->slots[i];
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88 | 05330448 | aliguori | } |
89 | 05330448 | aliguori | |
90 | d3f8d37f | aliguori | fprintf(stderr, "%s: no free slot available\n", __func__);
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91 | d3f8d37f | aliguori | abort(); |
92 | d3f8d37f | aliguori | } |
93 | d3f8d37f | aliguori | |
94 | d3f8d37f | aliguori | static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
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95 | c227f099 | Anthony Liguori | target_phys_addr_t start_addr, |
96 | c227f099 | Anthony Liguori | target_phys_addr_t end_addr) |
97 | d3f8d37f | aliguori | { |
98 | d3f8d37f | aliguori | int i;
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99 | d3f8d37f | aliguori | |
100 | d3f8d37f | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
101 | d3f8d37f | aliguori | KVMSlot *mem = &s->slots[i]; |
102 | d3f8d37f | aliguori | |
103 | d3f8d37f | aliguori | if (start_addr == mem->start_addr &&
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104 | d3f8d37f | aliguori | end_addr == mem->start_addr + mem->memory_size) { |
105 | d3f8d37f | aliguori | return mem;
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106 | d3f8d37f | aliguori | } |
107 | d3f8d37f | aliguori | } |
108 | d3f8d37f | aliguori | |
109 | 05330448 | aliguori | return NULL; |
110 | 05330448 | aliguori | } |
111 | 05330448 | aliguori | |
112 | 6152e2ae | aliguori | /*
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113 | 6152e2ae | aliguori | * Find overlapping slot with lowest start address
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114 | 6152e2ae | aliguori | */
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115 | 6152e2ae | aliguori | static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
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116 | c227f099 | Anthony Liguori | target_phys_addr_t start_addr, |
117 | c227f099 | Anthony Liguori | target_phys_addr_t end_addr) |
118 | 05330448 | aliguori | { |
119 | 6152e2ae | aliguori | KVMSlot *found = NULL;
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120 | 05330448 | aliguori | int i;
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121 | 05330448 | aliguori | |
122 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
123 | 05330448 | aliguori | KVMSlot *mem = &s->slots[i]; |
124 | 05330448 | aliguori | |
125 | 6152e2ae | aliguori | if (mem->memory_size == 0 || |
126 | 6152e2ae | aliguori | (found && found->start_addr < mem->start_addr)) { |
127 | 6152e2ae | aliguori | continue;
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128 | 6152e2ae | aliguori | } |
129 | 6152e2ae | aliguori | |
130 | 6152e2ae | aliguori | if (end_addr > mem->start_addr &&
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131 | 6152e2ae | aliguori | start_addr < mem->start_addr + mem->memory_size) { |
132 | 6152e2ae | aliguori | found = mem; |
133 | 6152e2ae | aliguori | } |
134 | 05330448 | aliguori | } |
135 | 05330448 | aliguori | |
136 | 6152e2ae | aliguori | return found;
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137 | 05330448 | aliguori | } |
138 | 05330448 | aliguori | |
139 | 5832d1f2 | aliguori | static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
140 | 5832d1f2 | aliguori | { |
141 | 5832d1f2 | aliguori | struct kvm_userspace_memory_region mem;
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142 | 5832d1f2 | aliguori | |
143 | 5832d1f2 | aliguori | mem.slot = slot->slot; |
144 | 5832d1f2 | aliguori | mem.guest_phys_addr = slot->start_addr; |
145 | 5832d1f2 | aliguori | mem.memory_size = slot->memory_size; |
146 | 5579c7f3 | pbrook | mem.userspace_addr = (unsigned long)qemu_get_ram_ptr(slot->phys_offset); |
147 | 5832d1f2 | aliguori | mem.flags = slot->flags; |
148 | 4495d6a7 | Jan Kiszka | if (s->migration_log) {
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149 | 4495d6a7 | Jan Kiszka | mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; |
150 | 4495d6a7 | Jan Kiszka | } |
151 | 5832d1f2 | aliguori | return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
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152 | 5832d1f2 | aliguori | } |
153 | 5832d1f2 | aliguori | |
154 | 8d2ba1fb | Jan Kiszka | static void kvm_reset_vcpu(void *opaque) |
155 | 8d2ba1fb | Jan Kiszka | { |
156 | 8d2ba1fb | Jan Kiszka | CPUState *env = opaque; |
157 | 8d2ba1fb | Jan Kiszka | |
158 | caa5af0f | Jan Kiszka | kvm_arch_reset_vcpu(env); |
159 | 8d2ba1fb | Jan Kiszka | } |
160 | 5832d1f2 | aliguori | |
161 | 6f725c13 | Glauber Costa | int kvm_irqchip_in_kernel(void) |
162 | 6f725c13 | Glauber Costa | { |
163 | 6f725c13 | Glauber Costa | return kvm_state->irqchip_in_kernel;
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164 | 6f725c13 | Glauber Costa | } |
165 | 6f725c13 | Glauber Costa | |
166 | 6f725c13 | Glauber Costa | int kvm_pit_in_kernel(void) |
167 | 6f725c13 | Glauber Costa | { |
168 | 6f725c13 | Glauber Costa | return kvm_state->pit_in_kernel;
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169 | 6f725c13 | Glauber Costa | } |
170 | 6f725c13 | Glauber Costa | |
171 | 6f725c13 | Glauber Costa | |
172 | 05330448 | aliguori | int kvm_init_vcpu(CPUState *env)
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173 | 05330448 | aliguori | { |
174 | 05330448 | aliguori | KVMState *s = kvm_state; |
175 | 05330448 | aliguori | long mmap_size;
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176 | 05330448 | aliguori | int ret;
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177 | 05330448 | aliguori | |
178 | 05330448 | aliguori | dprintf("kvm_init_vcpu\n");
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179 | 05330448 | aliguori | |
180 | 984b5181 | aliguori | ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
181 | 05330448 | aliguori | if (ret < 0) { |
182 | 05330448 | aliguori | dprintf("kvm_create_vcpu failed\n");
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183 | 05330448 | aliguori | goto err;
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184 | 05330448 | aliguori | } |
185 | 05330448 | aliguori | |
186 | 05330448 | aliguori | env->kvm_fd = ret; |
187 | 05330448 | aliguori | env->kvm_state = s; |
188 | 05330448 | aliguori | |
189 | 05330448 | aliguori | mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
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190 | 05330448 | aliguori | if (mmap_size < 0) { |
191 | 05330448 | aliguori | dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n");
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192 | 05330448 | aliguori | goto err;
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193 | 05330448 | aliguori | } |
194 | 05330448 | aliguori | |
195 | 05330448 | aliguori | env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
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196 | 05330448 | aliguori | env->kvm_fd, 0);
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197 | 05330448 | aliguori | if (env->kvm_run == MAP_FAILED) {
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198 | 05330448 | aliguori | ret = -errno; |
199 | 05330448 | aliguori | dprintf("mmap'ing vcpu state failed\n");
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200 | 05330448 | aliguori | goto err;
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201 | 05330448 | aliguori | } |
202 | 05330448 | aliguori | |
203 | 62a2744c | Sheng Yang | #ifdef KVM_CAP_COALESCED_MMIO
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204 | 62a2744c | Sheng Yang | if (s->coalesced_mmio && !s->coalesced_mmio_ring)
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205 | 62a2744c | Sheng Yang | s->coalesced_mmio_ring = (void *) env->kvm_run +
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206 | 62a2744c | Sheng Yang | s->coalesced_mmio * PAGE_SIZE; |
207 | 62a2744c | Sheng Yang | #endif
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208 | 62a2744c | Sheng Yang | |
209 | 05330448 | aliguori | ret = kvm_arch_init_vcpu(env); |
210 | 8d2ba1fb | Jan Kiszka | if (ret == 0) { |
211 | a08d4367 | Jan Kiszka | qemu_register_reset(kvm_reset_vcpu, env); |
212 | caa5af0f | Jan Kiszka | kvm_arch_reset_vcpu(env); |
213 | 8d2ba1fb | Jan Kiszka | } |
214 | 05330448 | aliguori | err:
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215 | 05330448 | aliguori | return ret;
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216 | 05330448 | aliguori | } |
217 | 05330448 | aliguori | |
218 | 5832d1f2 | aliguori | /*
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219 | 5832d1f2 | aliguori | * dirty pages logging control
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220 | 5832d1f2 | aliguori | */
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221 | c227f099 | Anthony Liguori | static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
222 | c227f099 | Anthony Liguori | ram_addr_t size, int flags, int mask) |
223 | 5832d1f2 | aliguori | { |
224 | 5832d1f2 | aliguori | KVMState *s = kvm_state; |
225 | d3f8d37f | aliguori | KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
226 | 4495d6a7 | Jan Kiszka | int old_flags;
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227 | 4495d6a7 | Jan Kiszka | |
228 | 5832d1f2 | aliguori | if (mem == NULL) { |
229 | d3f8d37f | aliguori | fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
230 | d3f8d37f | aliguori | TARGET_FMT_plx "\n", __func__, phys_addr,
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231 | c227f099 | Anthony Liguori | (target_phys_addr_t)(phys_addr + size - 1));
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232 | 5832d1f2 | aliguori | return -EINVAL;
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233 | 5832d1f2 | aliguori | } |
234 | 5832d1f2 | aliguori | |
235 | 4495d6a7 | Jan Kiszka | old_flags = mem->flags; |
236 | 5832d1f2 | aliguori | |
237 | 4495d6a7 | Jan Kiszka | flags = (mem->flags & ~mask) | flags; |
238 | 5832d1f2 | aliguori | mem->flags = flags; |
239 | 5832d1f2 | aliguori | |
240 | 4495d6a7 | Jan Kiszka | /* If nothing changed effectively, no need to issue ioctl */
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241 | 4495d6a7 | Jan Kiszka | if (s->migration_log) {
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242 | 4495d6a7 | Jan Kiszka | flags |= KVM_MEM_LOG_DIRTY_PAGES; |
243 | 4495d6a7 | Jan Kiszka | } |
244 | 4495d6a7 | Jan Kiszka | if (flags == old_flags) {
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245 | 4495d6a7 | Jan Kiszka | return 0; |
246 | 4495d6a7 | Jan Kiszka | } |
247 | 4495d6a7 | Jan Kiszka | |
248 | 5832d1f2 | aliguori | return kvm_set_user_memory_region(s, mem);
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249 | 5832d1f2 | aliguori | } |
250 | 5832d1f2 | aliguori | |
251 | c227f099 | Anthony Liguori | int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
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252 | 5832d1f2 | aliguori | { |
253 | d3f8d37f | aliguori | return kvm_dirty_pages_log_change(phys_addr, size,
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254 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES, |
255 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES); |
256 | 5832d1f2 | aliguori | } |
257 | 5832d1f2 | aliguori | |
258 | c227f099 | Anthony Liguori | int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
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259 | 5832d1f2 | aliguori | { |
260 | d3f8d37f | aliguori | return kvm_dirty_pages_log_change(phys_addr, size,
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261 | 5832d1f2 | aliguori | 0,
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262 | 5832d1f2 | aliguori | KVM_MEM_LOG_DIRTY_PAGES); |
263 | 5832d1f2 | aliguori | } |
264 | 5832d1f2 | aliguori | |
265 | 7b8f3b78 | Michael S. Tsirkin | static int kvm_set_migration_log(int enable) |
266 | 4495d6a7 | Jan Kiszka | { |
267 | 4495d6a7 | Jan Kiszka | KVMState *s = kvm_state; |
268 | 4495d6a7 | Jan Kiszka | KVMSlot *mem; |
269 | 4495d6a7 | Jan Kiszka | int i, err;
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270 | 4495d6a7 | Jan Kiszka | |
271 | 4495d6a7 | Jan Kiszka | s->migration_log = enable; |
272 | 4495d6a7 | Jan Kiszka | |
273 | 4495d6a7 | Jan Kiszka | for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
274 | 4495d6a7 | Jan Kiszka | mem = &s->slots[i]; |
275 | 4495d6a7 | Jan Kiszka | |
276 | 4495d6a7 | Jan Kiszka | if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
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277 | 4495d6a7 | Jan Kiszka | continue;
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278 | 4495d6a7 | Jan Kiszka | } |
279 | 4495d6a7 | Jan Kiszka | err = kvm_set_user_memory_region(s, mem); |
280 | 4495d6a7 | Jan Kiszka | if (err) {
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281 | 4495d6a7 | Jan Kiszka | return err;
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282 | 4495d6a7 | Jan Kiszka | } |
283 | 4495d6a7 | Jan Kiszka | } |
284 | 4495d6a7 | Jan Kiszka | return 0; |
285 | 4495d6a7 | Jan Kiszka | } |
286 | 4495d6a7 | Jan Kiszka | |
287 | 96c1606b | Alexander Graf | static int test_le_bit(unsigned long nr, unsigned char *addr) |
288 | 96c1606b | Alexander Graf | { |
289 | 96c1606b | Alexander Graf | return (addr[nr >> 3] >> (nr & 7)) & 1; |
290 | 96c1606b | Alexander Graf | } |
291 | 96c1606b | Alexander Graf | |
292 | 5832d1f2 | aliguori | /**
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293 | 5832d1f2 | aliguori | * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
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294 | 5832d1f2 | aliguori | * This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
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295 | 5832d1f2 | aliguori | * This means all bits are set to dirty.
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296 | 5832d1f2 | aliguori | *
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297 | d3f8d37f | aliguori | * @start_add: start of logged region.
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298 | 5832d1f2 | aliguori | * @end_addr: end of logged region.
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299 | 5832d1f2 | aliguori | */
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300 | 7b8f3b78 | Michael S. Tsirkin | static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
301 | 7b8f3b78 | Michael S. Tsirkin | target_phys_addr_t end_addr) |
302 | 5832d1f2 | aliguori | { |
303 | 5832d1f2 | aliguori | KVMState *s = kvm_state; |
304 | 151f7749 | Jan Kiszka | unsigned long size, allocated_size = 0; |
305 | c227f099 | Anthony Liguori | target_phys_addr_t phys_addr; |
306 | c227f099 | Anthony Liguori | ram_addr_t addr; |
307 | 151f7749 | Jan Kiszka | KVMDirtyLog d; |
308 | 151f7749 | Jan Kiszka | KVMSlot *mem; |
309 | 151f7749 | Jan Kiszka | int ret = 0; |
310 | 5832d1f2 | aliguori | |
311 | 151f7749 | Jan Kiszka | d.dirty_bitmap = NULL;
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312 | 151f7749 | Jan Kiszka | while (start_addr < end_addr) {
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313 | 151f7749 | Jan Kiszka | mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
314 | 151f7749 | Jan Kiszka | if (mem == NULL) { |
315 | 151f7749 | Jan Kiszka | break;
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316 | 151f7749 | Jan Kiszka | } |
317 | 5832d1f2 | aliguori | |
318 | 151f7749 | Jan Kiszka | size = ((mem->memory_size >> TARGET_PAGE_BITS) + 7) / 8; |
319 | 151f7749 | Jan Kiszka | if (!d.dirty_bitmap) {
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320 | 151f7749 | Jan Kiszka | d.dirty_bitmap = qemu_malloc(size); |
321 | 151f7749 | Jan Kiszka | } else if (size > allocated_size) { |
322 | 151f7749 | Jan Kiszka | d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); |
323 | 151f7749 | Jan Kiszka | } |
324 | 151f7749 | Jan Kiszka | allocated_size = size; |
325 | 151f7749 | Jan Kiszka | memset(d.dirty_bitmap, 0, allocated_size);
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326 | 5832d1f2 | aliguori | |
327 | 151f7749 | Jan Kiszka | d.slot = mem->slot; |
328 | 5832d1f2 | aliguori | |
329 | 6e489f3f | Anthony Liguori | if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
330 | 151f7749 | Jan Kiszka | dprintf("ioctl failed %d\n", errno);
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331 | 151f7749 | Jan Kiszka | ret = -1;
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332 | 151f7749 | Jan Kiszka | break;
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333 | 151f7749 | Jan Kiszka | } |
334 | 5832d1f2 | aliguori | |
335 | 151f7749 | Jan Kiszka | for (phys_addr = mem->start_addr, addr = mem->phys_offset;
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336 | 151f7749 | Jan Kiszka | phys_addr < mem->start_addr + mem->memory_size; |
337 | 151f7749 | Jan Kiszka | phys_addr += TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
338 | 96c1606b | Alexander Graf | unsigned char *bitmap = (unsigned char *)d.dirty_bitmap; |
339 | 151f7749 | Jan Kiszka | unsigned nr = (phys_addr - mem->start_addr) >> TARGET_PAGE_BITS;
|
340 | 151f7749 | Jan Kiszka | |
341 | 96c1606b | Alexander Graf | if (test_le_bit(nr, bitmap)) {
|
342 | 151f7749 | Jan Kiszka | cpu_physical_memory_set_dirty(addr); |
343 | 151f7749 | Jan Kiszka | } |
344 | 151f7749 | Jan Kiszka | } |
345 | 151f7749 | Jan Kiszka | start_addr = phys_addr; |
346 | 5832d1f2 | aliguori | } |
347 | 5832d1f2 | aliguori | qemu_free(d.dirty_bitmap); |
348 | 151f7749 | Jan Kiszka | |
349 | 151f7749 | Jan Kiszka | return ret;
|
350 | 5832d1f2 | aliguori | } |
351 | 5832d1f2 | aliguori | |
352 | c227f099 | Anthony Liguori | int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
353 | f65ed4c1 | aliguori | { |
354 | f65ed4c1 | aliguori | int ret = -ENOSYS;
|
355 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
356 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
357 | f65ed4c1 | aliguori | |
358 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
|
359 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_zone zone;
|
360 | f65ed4c1 | aliguori | |
361 | f65ed4c1 | aliguori | zone.addr = start; |
362 | f65ed4c1 | aliguori | zone.size = size; |
363 | f65ed4c1 | aliguori | |
364 | f65ed4c1 | aliguori | ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
365 | f65ed4c1 | aliguori | } |
366 | f65ed4c1 | aliguori | #endif
|
367 | f65ed4c1 | aliguori | |
368 | f65ed4c1 | aliguori | return ret;
|
369 | f65ed4c1 | aliguori | } |
370 | f65ed4c1 | aliguori | |
371 | c227f099 | Anthony Liguori | int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
372 | f65ed4c1 | aliguori | { |
373 | f65ed4c1 | aliguori | int ret = -ENOSYS;
|
374 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
375 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
376 | f65ed4c1 | aliguori | |
377 | f65ed4c1 | aliguori | if (s->coalesced_mmio) {
|
378 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio_zone zone;
|
379 | f65ed4c1 | aliguori | |
380 | f65ed4c1 | aliguori | zone.addr = start; |
381 | f65ed4c1 | aliguori | zone.size = size; |
382 | f65ed4c1 | aliguori | |
383 | f65ed4c1 | aliguori | ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
384 | f65ed4c1 | aliguori | } |
385 | f65ed4c1 | aliguori | #endif
|
386 | f65ed4c1 | aliguori | |
387 | f65ed4c1 | aliguori | return ret;
|
388 | f65ed4c1 | aliguori | } |
389 | f65ed4c1 | aliguori | |
390 | ad7b8b33 | Anthony Liguori | int kvm_check_extension(KVMState *s, unsigned int extension) |
391 | ad7b8b33 | Anthony Liguori | { |
392 | ad7b8b33 | Anthony Liguori | int ret;
|
393 | ad7b8b33 | Anthony Liguori | |
394 | ad7b8b33 | Anthony Liguori | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
395 | ad7b8b33 | Anthony Liguori | if (ret < 0) { |
396 | ad7b8b33 | Anthony Liguori | ret = 0;
|
397 | ad7b8b33 | Anthony Liguori | } |
398 | ad7b8b33 | Anthony Liguori | |
399 | ad7b8b33 | Anthony Liguori | return ret;
|
400 | ad7b8b33 | Anthony Liguori | } |
401 | ad7b8b33 | Anthony Liguori | |
402 | 7b8f3b78 | Michael S. Tsirkin | static void kvm_set_phys_mem(target_phys_addr_t start_addr, |
403 | 7b8f3b78 | Michael S. Tsirkin | ram_addr_t size, |
404 | 7b8f3b78 | Michael S. Tsirkin | ram_addr_t phys_offset) |
405 | 46dbef6a | Michael S. Tsirkin | { |
406 | 46dbef6a | Michael S. Tsirkin | KVMState *s = kvm_state; |
407 | 46dbef6a | Michael S. Tsirkin | ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
408 | 46dbef6a | Michael S. Tsirkin | KVMSlot *mem, old; |
409 | 46dbef6a | Michael S. Tsirkin | int err;
|
410 | 46dbef6a | Michael S. Tsirkin | |
411 | 46dbef6a | Michael S. Tsirkin | if (start_addr & ~TARGET_PAGE_MASK) {
|
412 | 46dbef6a | Michael S. Tsirkin | if (flags >= IO_MEM_UNASSIGNED) {
|
413 | 46dbef6a | Michael S. Tsirkin | if (!kvm_lookup_overlapping_slot(s, start_addr,
|
414 | 46dbef6a | Michael S. Tsirkin | start_addr + size)) { |
415 | 46dbef6a | Michael S. Tsirkin | return;
|
416 | 46dbef6a | Michael S. Tsirkin | } |
417 | 46dbef6a | Michael S. Tsirkin | fprintf(stderr, "Unaligned split of a KVM memory slot\n");
|
418 | 46dbef6a | Michael S. Tsirkin | } else {
|
419 | 46dbef6a | Michael S. Tsirkin | fprintf(stderr, "Only page-aligned memory slots supported\n");
|
420 | 46dbef6a | Michael S. Tsirkin | } |
421 | 46dbef6a | Michael S. Tsirkin | abort(); |
422 | 46dbef6a | Michael S. Tsirkin | } |
423 | 46dbef6a | Michael S. Tsirkin | |
424 | 46dbef6a | Michael S. Tsirkin | /* KVM does not support read-only slots */
|
425 | 46dbef6a | Michael S. Tsirkin | phys_offset &= ~IO_MEM_ROM; |
426 | 46dbef6a | Michael S. Tsirkin | |
427 | 46dbef6a | Michael S. Tsirkin | while (1) { |
428 | 46dbef6a | Michael S. Tsirkin | mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
429 | 46dbef6a | Michael S. Tsirkin | if (!mem) {
|
430 | 46dbef6a | Michael S. Tsirkin | break;
|
431 | 46dbef6a | Michael S. Tsirkin | } |
432 | 46dbef6a | Michael S. Tsirkin | |
433 | 46dbef6a | Michael S. Tsirkin | if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
|
434 | 46dbef6a | Michael S. Tsirkin | (start_addr + size <= mem->start_addr + mem->memory_size) && |
435 | 46dbef6a | Michael S. Tsirkin | (phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
436 | 46dbef6a | Michael S. Tsirkin | /* The new slot fits into the existing one and comes with
|
437 | 46dbef6a | Michael S. Tsirkin | * identical parameters - nothing to be done. */
|
438 | 46dbef6a | Michael S. Tsirkin | return;
|
439 | 46dbef6a | Michael S. Tsirkin | } |
440 | 46dbef6a | Michael S. Tsirkin | |
441 | 46dbef6a | Michael S. Tsirkin | old = *mem; |
442 | 46dbef6a | Michael S. Tsirkin | |
443 | 46dbef6a | Michael S. Tsirkin | /* unregister the overlapping slot */
|
444 | 46dbef6a | Michael S. Tsirkin | mem->memory_size = 0;
|
445 | 46dbef6a | Michael S. Tsirkin | err = kvm_set_user_memory_region(s, mem); |
446 | 46dbef6a | Michael S. Tsirkin | if (err) {
|
447 | 46dbef6a | Michael S. Tsirkin | fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
448 | 46dbef6a | Michael S. Tsirkin | __func__, strerror(-err)); |
449 | 46dbef6a | Michael S. Tsirkin | abort(); |
450 | 46dbef6a | Michael S. Tsirkin | } |
451 | 46dbef6a | Michael S. Tsirkin | |
452 | 46dbef6a | Michael S. Tsirkin | /* Workaround for older KVM versions: we can't join slots, even not by
|
453 | 46dbef6a | Michael S. Tsirkin | * unregistering the previous ones and then registering the larger
|
454 | 46dbef6a | Michael S. Tsirkin | * slot. We have to maintain the existing fragmentation. Sigh.
|
455 | 46dbef6a | Michael S. Tsirkin | *
|
456 | 46dbef6a | Michael S. Tsirkin | * This workaround assumes that the new slot starts at the same
|
457 | 46dbef6a | Michael S. Tsirkin | * address as the first existing one. If not or if some overlapping
|
458 | 46dbef6a | Michael S. Tsirkin | * slot comes around later, we will fail (not seen in practice so far)
|
459 | 46dbef6a | Michael S. Tsirkin | * - and actually require a recent KVM version. */
|
460 | 46dbef6a | Michael S. Tsirkin | if (s->broken_set_mem_region &&
|
461 | 46dbef6a | Michael S. Tsirkin | old.start_addr == start_addr && old.memory_size < size && |
462 | 46dbef6a | Michael S. Tsirkin | flags < IO_MEM_UNASSIGNED) { |
463 | 46dbef6a | Michael S. Tsirkin | mem = kvm_alloc_slot(s); |
464 | 46dbef6a | Michael S. Tsirkin | mem->memory_size = old.memory_size; |
465 | 46dbef6a | Michael S. Tsirkin | mem->start_addr = old.start_addr; |
466 | 46dbef6a | Michael S. Tsirkin | mem->phys_offset = old.phys_offset; |
467 | 46dbef6a | Michael S. Tsirkin | mem->flags = 0;
|
468 | 46dbef6a | Michael S. Tsirkin | |
469 | 46dbef6a | Michael S. Tsirkin | err = kvm_set_user_memory_region(s, mem); |
470 | 46dbef6a | Michael S. Tsirkin | if (err) {
|
471 | 46dbef6a | Michael S. Tsirkin | fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
472 | 46dbef6a | Michael S. Tsirkin | strerror(-err)); |
473 | 46dbef6a | Michael S. Tsirkin | abort(); |
474 | 46dbef6a | Michael S. Tsirkin | } |
475 | 46dbef6a | Michael S. Tsirkin | |
476 | 46dbef6a | Michael S. Tsirkin | start_addr += old.memory_size; |
477 | 46dbef6a | Michael S. Tsirkin | phys_offset += old.memory_size; |
478 | 46dbef6a | Michael S. Tsirkin | size -= old.memory_size; |
479 | 46dbef6a | Michael S. Tsirkin | continue;
|
480 | 46dbef6a | Michael S. Tsirkin | } |
481 | 46dbef6a | Michael S. Tsirkin | |
482 | 46dbef6a | Michael S. Tsirkin | /* register prefix slot */
|
483 | 46dbef6a | Michael S. Tsirkin | if (old.start_addr < start_addr) {
|
484 | 46dbef6a | Michael S. Tsirkin | mem = kvm_alloc_slot(s); |
485 | 46dbef6a | Michael S. Tsirkin | mem->memory_size = start_addr - old.start_addr; |
486 | 46dbef6a | Michael S. Tsirkin | mem->start_addr = old.start_addr; |
487 | 46dbef6a | Michael S. Tsirkin | mem->phys_offset = old.phys_offset; |
488 | 46dbef6a | Michael S. Tsirkin | mem->flags = 0;
|
489 | 46dbef6a | Michael S. Tsirkin | |
490 | 46dbef6a | Michael S. Tsirkin | err = kvm_set_user_memory_region(s, mem); |
491 | 46dbef6a | Michael S. Tsirkin | if (err) {
|
492 | 46dbef6a | Michael S. Tsirkin | fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
493 | 46dbef6a | Michael S. Tsirkin | __func__, strerror(-err)); |
494 | 46dbef6a | Michael S. Tsirkin | abort(); |
495 | 46dbef6a | Michael S. Tsirkin | } |
496 | 46dbef6a | Michael S. Tsirkin | } |
497 | 46dbef6a | Michael S. Tsirkin | |
498 | 46dbef6a | Michael S. Tsirkin | /* register suffix slot */
|
499 | 46dbef6a | Michael S. Tsirkin | if (old.start_addr + old.memory_size > start_addr + size) {
|
500 | 46dbef6a | Michael S. Tsirkin | ram_addr_t size_delta; |
501 | 46dbef6a | Michael S. Tsirkin | |
502 | 46dbef6a | Michael S. Tsirkin | mem = kvm_alloc_slot(s); |
503 | 46dbef6a | Michael S. Tsirkin | mem->start_addr = start_addr + size; |
504 | 46dbef6a | Michael S. Tsirkin | size_delta = mem->start_addr - old.start_addr; |
505 | 46dbef6a | Michael S. Tsirkin | mem->memory_size = old.memory_size - size_delta; |
506 | 46dbef6a | Michael S. Tsirkin | mem->phys_offset = old.phys_offset + size_delta; |
507 | 46dbef6a | Michael S. Tsirkin | mem->flags = 0;
|
508 | 46dbef6a | Michael S. Tsirkin | |
509 | 46dbef6a | Michael S. Tsirkin | err = kvm_set_user_memory_region(s, mem); |
510 | 46dbef6a | Michael S. Tsirkin | if (err) {
|
511 | 46dbef6a | Michael S. Tsirkin | fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
512 | 46dbef6a | Michael S. Tsirkin | __func__, strerror(-err)); |
513 | 46dbef6a | Michael S. Tsirkin | abort(); |
514 | 46dbef6a | Michael S. Tsirkin | } |
515 | 46dbef6a | Michael S. Tsirkin | } |
516 | 46dbef6a | Michael S. Tsirkin | } |
517 | 46dbef6a | Michael S. Tsirkin | |
518 | 46dbef6a | Michael S. Tsirkin | /* in case the KVM bug workaround already "consumed" the new slot */
|
519 | 46dbef6a | Michael S. Tsirkin | if (!size)
|
520 | 46dbef6a | Michael S. Tsirkin | return;
|
521 | 46dbef6a | Michael S. Tsirkin | |
522 | 46dbef6a | Michael S. Tsirkin | /* KVM does not need to know about this memory */
|
523 | 46dbef6a | Michael S. Tsirkin | if (flags >= IO_MEM_UNASSIGNED)
|
524 | 46dbef6a | Michael S. Tsirkin | return;
|
525 | 46dbef6a | Michael S. Tsirkin | |
526 | 46dbef6a | Michael S. Tsirkin | mem = kvm_alloc_slot(s); |
527 | 46dbef6a | Michael S. Tsirkin | mem->memory_size = size; |
528 | 46dbef6a | Michael S. Tsirkin | mem->start_addr = start_addr; |
529 | 46dbef6a | Michael S. Tsirkin | mem->phys_offset = phys_offset; |
530 | 46dbef6a | Michael S. Tsirkin | mem->flags = 0;
|
531 | 46dbef6a | Michael S. Tsirkin | |
532 | 46dbef6a | Michael S. Tsirkin | err = kvm_set_user_memory_region(s, mem); |
533 | 46dbef6a | Michael S. Tsirkin | if (err) {
|
534 | 46dbef6a | Michael S. Tsirkin | fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
535 | 46dbef6a | Michael S. Tsirkin | strerror(-err)); |
536 | 46dbef6a | Michael S. Tsirkin | abort(); |
537 | 46dbef6a | Michael S. Tsirkin | } |
538 | 46dbef6a | Michael S. Tsirkin | } |
539 | 46dbef6a | Michael S. Tsirkin | |
540 | 7b8f3b78 | Michael S. Tsirkin | static void kvm_client_set_memory(struct CPUPhysMemoryClient *client, |
541 | 7b8f3b78 | Michael S. Tsirkin | target_phys_addr_t start_addr, |
542 | 7b8f3b78 | Michael S. Tsirkin | ram_addr_t size, |
543 | 7b8f3b78 | Michael S. Tsirkin | ram_addr_t phys_offset) |
544 | 7b8f3b78 | Michael S. Tsirkin | { |
545 | 7b8f3b78 | Michael S. Tsirkin | kvm_set_phys_mem(start_addr, size, phys_offset); |
546 | 7b8f3b78 | Michael S. Tsirkin | } |
547 | 7b8f3b78 | Michael S. Tsirkin | |
548 | 7b8f3b78 | Michael S. Tsirkin | static int kvm_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client, |
549 | 7b8f3b78 | Michael S. Tsirkin | target_phys_addr_t start_addr, |
550 | 7b8f3b78 | Michael S. Tsirkin | target_phys_addr_t end_addr) |
551 | 7b8f3b78 | Michael S. Tsirkin | { |
552 | 7b8f3b78 | Michael S. Tsirkin | return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
|
553 | 7b8f3b78 | Michael S. Tsirkin | } |
554 | 7b8f3b78 | Michael S. Tsirkin | |
555 | 7b8f3b78 | Michael S. Tsirkin | static int kvm_client_migration_log(struct CPUPhysMemoryClient *client, |
556 | 7b8f3b78 | Michael S. Tsirkin | int enable)
|
557 | 7b8f3b78 | Michael S. Tsirkin | { |
558 | 7b8f3b78 | Michael S. Tsirkin | return kvm_set_migration_log(enable);
|
559 | 7b8f3b78 | Michael S. Tsirkin | } |
560 | 7b8f3b78 | Michael S. Tsirkin | |
561 | 7b8f3b78 | Michael S. Tsirkin | static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
|
562 | 7b8f3b78 | Michael S. Tsirkin | .set_memory = kvm_client_set_memory, |
563 | 7b8f3b78 | Michael S. Tsirkin | .sync_dirty_bitmap = kvm_client_sync_dirty_bitmap, |
564 | 7b8f3b78 | Michael S. Tsirkin | .migration_log = kvm_client_migration_log, |
565 | 7b8f3b78 | Michael S. Tsirkin | }; |
566 | 7b8f3b78 | Michael S. Tsirkin | |
567 | 05330448 | aliguori | int kvm_init(int smp_cpus) |
568 | 05330448 | aliguori | { |
569 | 168ccc11 | Jan Kiszka | static const char upgrade_note[] = |
570 | 168ccc11 | Jan Kiszka | "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
|
571 | 168ccc11 | Jan Kiszka | "(see http://sourceforge.net/projects/kvm).\n";
|
572 | 05330448 | aliguori | KVMState *s; |
573 | 05330448 | aliguori | int ret;
|
574 | 05330448 | aliguori | int i;
|
575 | 05330448 | aliguori | |
576 | 9f8fd694 | Mark McLoughlin | if (smp_cpus > 1) { |
577 | 9f8fd694 | Mark McLoughlin | fprintf(stderr, "No SMP KVM support, use '-smp 1'\n");
|
578 | 05330448 | aliguori | return -EINVAL;
|
579 | 9f8fd694 | Mark McLoughlin | } |
580 | 05330448 | aliguori | |
581 | 05330448 | aliguori | s = qemu_mallocz(sizeof(KVMState));
|
582 | 05330448 | aliguori | |
583 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
584 | 72cf2d4f | Blue Swirl | QTAILQ_INIT(&s->kvm_sw_breakpoints); |
585 | e22a25c9 | aliguori | #endif
|
586 | 05330448 | aliguori | for (i = 0; i < ARRAY_SIZE(s->slots); i++) |
587 | 05330448 | aliguori | s->slots[i].slot = i; |
588 | 05330448 | aliguori | |
589 | 05330448 | aliguori | s->vmfd = -1;
|
590 | 40ff6d7e | Kevin Wolf | s->fd = qemu_open("/dev/kvm", O_RDWR);
|
591 | 05330448 | aliguori | if (s->fd == -1) { |
592 | 05330448 | aliguori | fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
593 | 05330448 | aliguori | ret = -errno; |
594 | 05330448 | aliguori | goto err;
|
595 | 05330448 | aliguori | } |
596 | 05330448 | aliguori | |
597 | 05330448 | aliguori | ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
598 | 05330448 | aliguori | if (ret < KVM_API_VERSION) {
|
599 | 05330448 | aliguori | if (ret > 0) |
600 | 05330448 | aliguori | ret = -EINVAL; |
601 | 05330448 | aliguori | fprintf(stderr, "kvm version too old\n");
|
602 | 05330448 | aliguori | goto err;
|
603 | 05330448 | aliguori | } |
604 | 05330448 | aliguori | |
605 | 05330448 | aliguori | if (ret > KVM_API_VERSION) {
|
606 | 05330448 | aliguori | ret = -EINVAL; |
607 | 05330448 | aliguori | fprintf(stderr, "kvm version not supported\n");
|
608 | 05330448 | aliguori | goto err;
|
609 | 05330448 | aliguori | } |
610 | 05330448 | aliguori | |
611 | 05330448 | aliguori | s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
612 | 05330448 | aliguori | if (s->vmfd < 0) |
613 | 05330448 | aliguori | goto err;
|
614 | 05330448 | aliguori | |
615 | 05330448 | aliguori | /* initially, KVM allocated its own memory and we had to jump through
|
616 | 05330448 | aliguori | * hooks to make phys_ram_base point to this. Modern versions of KVM
|
617 | 5579c7f3 | pbrook | * just use a user allocated buffer so we can use regular pages
|
618 | 05330448 | aliguori | * unmodified. Make sure we have a sufficiently modern version of KVM.
|
619 | 05330448 | aliguori | */
|
620 | ad7b8b33 | Anthony Liguori | if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) {
|
621 | ad7b8b33 | Anthony Liguori | ret = -EINVAL; |
622 | 168ccc11 | Jan Kiszka | fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n%s",
|
623 | 168ccc11 | Jan Kiszka | upgrade_note); |
624 | 05330448 | aliguori | goto err;
|
625 | 05330448 | aliguori | } |
626 | 05330448 | aliguori | |
627 | d85dc283 | aliguori | /* There was a nasty bug in < kvm-80 that prevents memory slots from being
|
628 | d85dc283 | aliguori | * destroyed properly. Since we rely on this capability, refuse to work
|
629 | d85dc283 | aliguori | * with any kernel without this capability. */
|
630 | ad7b8b33 | Anthony Liguori | if (!kvm_check_extension(s, KVM_CAP_DESTROY_MEMORY_REGION_WORKS)) {
|
631 | ad7b8b33 | Anthony Liguori | ret = -EINVAL; |
632 | d85dc283 | aliguori | |
633 | d85dc283 | aliguori | fprintf(stderr, |
634 | 168ccc11 | Jan Kiszka | "KVM kernel module broken (DESTROY_MEMORY_REGION).\n%s",
|
635 | 168ccc11 | Jan Kiszka | upgrade_note); |
636 | d85dc283 | aliguori | goto err;
|
637 | d85dc283 | aliguori | } |
638 | d85dc283 | aliguori | |
639 | 62a2744c | Sheng Yang | s->coalesced_mmio = 0;
|
640 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
641 | ad7b8b33 | Anthony Liguori | s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
642 | 62a2744c | Sheng Yang | s->coalesced_mmio_ring = NULL;
|
643 | f65ed4c1 | aliguori | #endif
|
644 | f65ed4c1 | aliguori | |
645 | e69917e2 | Jan Kiszka | s->broken_set_mem_region = 1;
|
646 | e69917e2 | Jan Kiszka | #ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
|
647 | e69917e2 | Jan Kiszka | ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
648 | e69917e2 | Jan Kiszka | if (ret > 0) { |
649 | e69917e2 | Jan Kiszka | s->broken_set_mem_region = 0;
|
650 | e69917e2 | Jan Kiszka | } |
651 | e69917e2 | Jan Kiszka | #endif
|
652 | e69917e2 | Jan Kiszka | |
653 | a0fb002c | Jan Kiszka | s->vcpu_events = 0;
|
654 | a0fb002c | Jan Kiszka | #ifdef KVM_CAP_VCPU_EVENTS
|
655 | a0fb002c | Jan Kiszka | s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); |
656 | a0fb002c | Jan Kiszka | #endif
|
657 | a0fb002c | Jan Kiszka | |
658 | b0b1d690 | Jan Kiszka | s->robust_singlestep = 0;
|
659 | b0b1d690 | Jan Kiszka | #ifdef KVM_CAP_X86_ROBUST_SINGLESTEP
|
660 | b0b1d690 | Jan Kiszka | s->robust_singlestep = |
661 | b0b1d690 | Jan Kiszka | kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); |
662 | b0b1d690 | Jan Kiszka | #endif
|
663 | b0b1d690 | Jan Kiszka | |
664 | 05330448 | aliguori | ret = kvm_arch_init(s, smp_cpus); |
665 | 05330448 | aliguori | if (ret < 0) |
666 | 05330448 | aliguori | goto err;
|
667 | 05330448 | aliguori | |
668 | 05330448 | aliguori | kvm_state = s; |
669 | 7b8f3b78 | Michael S. Tsirkin | cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client); |
670 | 05330448 | aliguori | |
671 | 05330448 | aliguori | return 0; |
672 | 05330448 | aliguori | |
673 | 05330448 | aliguori | err:
|
674 | 05330448 | aliguori | if (s) {
|
675 | 05330448 | aliguori | if (s->vmfd != -1) |
676 | 05330448 | aliguori | close(s->vmfd); |
677 | 05330448 | aliguori | if (s->fd != -1) |
678 | 05330448 | aliguori | close(s->fd); |
679 | 05330448 | aliguori | } |
680 | 05330448 | aliguori | qemu_free(s); |
681 | 05330448 | aliguori | |
682 | 05330448 | aliguori | return ret;
|
683 | 05330448 | aliguori | } |
684 | 05330448 | aliguori | |
685 | afcea8cb | Blue Swirl | static int kvm_handle_io(uint16_t port, void *data, int direction, int size, |
686 | afcea8cb | Blue Swirl | uint32_t count) |
687 | 05330448 | aliguori | { |
688 | 05330448 | aliguori | int i;
|
689 | 05330448 | aliguori | uint8_t *ptr = data; |
690 | 05330448 | aliguori | |
691 | 05330448 | aliguori | for (i = 0; i < count; i++) { |
692 | 05330448 | aliguori | if (direction == KVM_EXIT_IO_IN) {
|
693 | 05330448 | aliguori | switch (size) {
|
694 | 05330448 | aliguori | case 1: |
695 | afcea8cb | Blue Swirl | stb_p(ptr, cpu_inb(port)); |
696 | 05330448 | aliguori | break;
|
697 | 05330448 | aliguori | case 2: |
698 | afcea8cb | Blue Swirl | stw_p(ptr, cpu_inw(port)); |
699 | 05330448 | aliguori | break;
|
700 | 05330448 | aliguori | case 4: |
701 | afcea8cb | Blue Swirl | stl_p(ptr, cpu_inl(port)); |
702 | 05330448 | aliguori | break;
|
703 | 05330448 | aliguori | } |
704 | 05330448 | aliguori | } else {
|
705 | 05330448 | aliguori | switch (size) {
|
706 | 05330448 | aliguori | case 1: |
707 | afcea8cb | Blue Swirl | cpu_outb(port, ldub_p(ptr)); |
708 | 05330448 | aliguori | break;
|
709 | 05330448 | aliguori | case 2: |
710 | afcea8cb | Blue Swirl | cpu_outw(port, lduw_p(ptr)); |
711 | 05330448 | aliguori | break;
|
712 | 05330448 | aliguori | case 4: |
713 | afcea8cb | Blue Swirl | cpu_outl(port, ldl_p(ptr)); |
714 | 05330448 | aliguori | break;
|
715 | 05330448 | aliguori | } |
716 | 05330448 | aliguori | } |
717 | 05330448 | aliguori | |
718 | 05330448 | aliguori | ptr += size; |
719 | 05330448 | aliguori | } |
720 | 05330448 | aliguori | |
721 | 05330448 | aliguori | return 1; |
722 | 05330448 | aliguori | } |
723 | 05330448 | aliguori | |
724 | 62a2744c | Sheng Yang | void kvm_flush_coalesced_mmio_buffer(void) |
725 | f65ed4c1 | aliguori | { |
726 | f65ed4c1 | aliguori | #ifdef KVM_CAP_COALESCED_MMIO
|
727 | f65ed4c1 | aliguori | KVMState *s = kvm_state; |
728 | 62a2744c | Sheng Yang | if (s->coalesced_mmio_ring) {
|
729 | 62a2744c | Sheng Yang | struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
|
730 | f65ed4c1 | aliguori | while (ring->first != ring->last) {
|
731 | f65ed4c1 | aliguori | struct kvm_coalesced_mmio *ent;
|
732 | f65ed4c1 | aliguori | |
733 | f65ed4c1 | aliguori | ent = &ring->coalesced_mmio[ring->first]; |
734 | f65ed4c1 | aliguori | |
735 | f65ed4c1 | aliguori | cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
736 | 85199474 | Marcelo Tosatti | smp_wmb(); |
737 | f65ed4c1 | aliguori | ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
738 | f65ed4c1 | aliguori | } |
739 | f65ed4c1 | aliguori | } |
740 | f65ed4c1 | aliguori | #endif
|
741 | f65ed4c1 | aliguori | } |
742 | f65ed4c1 | aliguori | |
743 | 4c0960c0 | Avi Kivity | void kvm_cpu_synchronize_state(CPUState *env)
|
744 | 4c0960c0 | Avi Kivity | { |
745 | 9ded2744 | Jan Kiszka | if (!env->kvm_vcpu_dirty) {
|
746 | 4c0960c0 | Avi Kivity | kvm_arch_get_registers(env); |
747 | 9ded2744 | Jan Kiszka | env->kvm_vcpu_dirty = 1;
|
748 | 4c0960c0 | Avi Kivity | } |
749 | 4c0960c0 | Avi Kivity | } |
750 | 4c0960c0 | Avi Kivity | |
751 | ea375f9a | Jan Kiszka | void kvm_cpu_synchronize_post_reset(CPUState *env)
|
752 | ea375f9a | Jan Kiszka | { |
753 | ea375f9a | Jan Kiszka | kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); |
754 | ea375f9a | Jan Kiszka | env->kvm_vcpu_dirty = 0;
|
755 | ea375f9a | Jan Kiszka | } |
756 | ea375f9a | Jan Kiszka | |
757 | ea375f9a | Jan Kiszka | void kvm_cpu_synchronize_post_init(CPUState *env)
|
758 | ea375f9a | Jan Kiszka | { |
759 | ea375f9a | Jan Kiszka | kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); |
760 | ea375f9a | Jan Kiszka | env->kvm_vcpu_dirty = 0;
|
761 | ea375f9a | Jan Kiszka | } |
762 | ea375f9a | Jan Kiszka | |
763 | 05330448 | aliguori | int kvm_cpu_exec(CPUState *env)
|
764 | 05330448 | aliguori | { |
765 | 05330448 | aliguori | struct kvm_run *run = env->kvm_run;
|
766 | 05330448 | aliguori | int ret;
|
767 | 05330448 | aliguori | |
768 | 05330448 | aliguori | dprintf("kvm_cpu_exec()\n");
|
769 | 05330448 | aliguori | |
770 | 05330448 | aliguori | do {
|
771 | 6312b928 | Marcelo Tosatti | #ifndef CONFIG_IOTHREAD
|
772 | be214e6c | aurel32 | if (env->exit_request) {
|
773 | 05330448 | aliguori | dprintf("interrupt exit requested\n");
|
774 | 05330448 | aliguori | ret = 0;
|
775 | 05330448 | aliguori | break;
|
776 | 05330448 | aliguori | } |
777 | 6312b928 | Marcelo Tosatti | #endif
|
778 | 05330448 | aliguori | |
779 | 9ded2744 | Jan Kiszka | if (env->kvm_vcpu_dirty) {
|
780 | ea375f9a | Jan Kiszka | kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); |
781 | 9ded2744 | Jan Kiszka | env->kvm_vcpu_dirty = 0;
|
782 | 4c0960c0 | Avi Kivity | } |
783 | 4c0960c0 | Avi Kivity | |
784 | 8c14c173 | Jan Kiszka | kvm_arch_pre_run(env, run); |
785 | d549db5a | Glauber Costa | qemu_mutex_unlock_iothread(); |
786 | 05330448 | aliguori | ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
|
787 | d549db5a | Glauber Costa | qemu_mutex_lock_iothread(); |
788 | 05330448 | aliguori | kvm_arch_post_run(env, run); |
789 | 05330448 | aliguori | |
790 | 05330448 | aliguori | if (ret == -EINTR || ret == -EAGAIN) {
|
791 | cc84de95 | Marcelo Tosatti | cpu_exit(env); |
792 | 05330448 | aliguori | dprintf("io window exit\n");
|
793 | 05330448 | aliguori | ret = 0;
|
794 | 05330448 | aliguori | break;
|
795 | 05330448 | aliguori | } |
796 | 05330448 | aliguori | |
797 | 05330448 | aliguori | if (ret < 0) { |
798 | 05330448 | aliguori | dprintf("kvm run failed %s\n", strerror(-ret));
|
799 | 05330448 | aliguori | abort(); |
800 | 05330448 | aliguori | } |
801 | 05330448 | aliguori | |
802 | 62a2744c | Sheng Yang | kvm_flush_coalesced_mmio_buffer(); |
803 | f65ed4c1 | aliguori | |
804 | 05330448 | aliguori | ret = 0; /* exit loop */ |
805 | 05330448 | aliguori | switch (run->exit_reason) {
|
806 | 05330448 | aliguori | case KVM_EXIT_IO:
|
807 | 05330448 | aliguori | dprintf("handle_io\n");
|
808 | afcea8cb | Blue Swirl | ret = kvm_handle_io(run->io.port, |
809 | 05330448 | aliguori | (uint8_t *)run + run->io.data_offset, |
810 | 05330448 | aliguori | run->io.direction, |
811 | 05330448 | aliguori | run->io.size, |
812 | 05330448 | aliguori | run->io.count); |
813 | 05330448 | aliguori | break;
|
814 | 05330448 | aliguori | case KVM_EXIT_MMIO:
|
815 | 05330448 | aliguori | dprintf("handle_mmio\n");
|
816 | 05330448 | aliguori | cpu_physical_memory_rw(run->mmio.phys_addr, |
817 | 05330448 | aliguori | run->mmio.data, |
818 | 05330448 | aliguori | run->mmio.len, |
819 | 05330448 | aliguori | run->mmio.is_write); |
820 | 05330448 | aliguori | ret = 1;
|
821 | 05330448 | aliguori | break;
|
822 | 05330448 | aliguori | case KVM_EXIT_IRQ_WINDOW_OPEN:
|
823 | 05330448 | aliguori | dprintf("irq_window_open\n");
|
824 | 05330448 | aliguori | break;
|
825 | 05330448 | aliguori | case KVM_EXIT_SHUTDOWN:
|
826 | 05330448 | aliguori | dprintf("shutdown\n");
|
827 | 05330448 | aliguori | qemu_system_reset_request(); |
828 | 05330448 | aliguori | ret = 1;
|
829 | 05330448 | aliguori | break;
|
830 | 05330448 | aliguori | case KVM_EXIT_UNKNOWN:
|
831 | 05330448 | aliguori | dprintf("kvm_exit_unknown\n");
|
832 | 05330448 | aliguori | break;
|
833 | 05330448 | aliguori | case KVM_EXIT_FAIL_ENTRY:
|
834 | 05330448 | aliguori | dprintf("kvm_exit_fail_entry\n");
|
835 | 05330448 | aliguori | break;
|
836 | 05330448 | aliguori | case KVM_EXIT_EXCEPTION:
|
837 | 05330448 | aliguori | dprintf("kvm_exit_exception\n");
|
838 | 05330448 | aliguori | break;
|
839 | 05330448 | aliguori | case KVM_EXIT_DEBUG:
|
840 | 05330448 | aliguori | dprintf("kvm_exit_debug\n");
|
841 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
842 | e22a25c9 | aliguori | if (kvm_arch_debug(&run->debug.arch)) {
|
843 | e22a25c9 | aliguori | gdb_set_stop_cpu(env); |
844 | e22a25c9 | aliguori | vm_stop(EXCP_DEBUG); |
845 | e22a25c9 | aliguori | env->exception_index = EXCP_DEBUG; |
846 | e22a25c9 | aliguori | return 0; |
847 | e22a25c9 | aliguori | } |
848 | e22a25c9 | aliguori | /* re-enter, this exception was guest-internal */
|
849 | e22a25c9 | aliguori | ret = 1;
|
850 | e22a25c9 | aliguori | #endif /* KVM_CAP_SET_GUEST_DEBUG */ |
851 | 05330448 | aliguori | break;
|
852 | 05330448 | aliguori | default:
|
853 | 05330448 | aliguori | dprintf("kvm_arch_handle_exit\n");
|
854 | 05330448 | aliguori | ret = kvm_arch_handle_exit(env, run); |
855 | 05330448 | aliguori | break;
|
856 | 05330448 | aliguori | } |
857 | 05330448 | aliguori | } while (ret > 0); |
858 | 05330448 | aliguori | |
859 | be214e6c | aurel32 | if (env->exit_request) {
|
860 | be214e6c | aurel32 | env->exit_request = 0;
|
861 | becfc390 | aliguori | env->exception_index = EXCP_INTERRUPT; |
862 | becfc390 | aliguori | } |
863 | becfc390 | aliguori | |
864 | 05330448 | aliguori | return ret;
|
865 | 05330448 | aliguori | } |
866 | 05330448 | aliguori | |
867 | 984b5181 | aliguori | int kvm_ioctl(KVMState *s, int type, ...) |
868 | 05330448 | aliguori | { |
869 | 05330448 | aliguori | int ret;
|
870 | 984b5181 | aliguori | void *arg;
|
871 | 984b5181 | aliguori | va_list ap; |
872 | 05330448 | aliguori | |
873 | 984b5181 | aliguori | va_start(ap, type); |
874 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
875 | 984b5181 | aliguori | va_end(ap); |
876 | 984b5181 | aliguori | |
877 | 984b5181 | aliguori | ret = ioctl(s->fd, type, arg); |
878 | 05330448 | aliguori | if (ret == -1) |
879 | 05330448 | aliguori | ret = -errno; |
880 | 05330448 | aliguori | |
881 | 05330448 | aliguori | return ret;
|
882 | 05330448 | aliguori | } |
883 | 05330448 | aliguori | |
884 | 984b5181 | aliguori | int kvm_vm_ioctl(KVMState *s, int type, ...) |
885 | 05330448 | aliguori | { |
886 | 05330448 | aliguori | int ret;
|
887 | 984b5181 | aliguori | void *arg;
|
888 | 984b5181 | aliguori | va_list ap; |
889 | 984b5181 | aliguori | |
890 | 984b5181 | aliguori | va_start(ap, type); |
891 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
892 | 984b5181 | aliguori | va_end(ap); |
893 | 05330448 | aliguori | |
894 | 984b5181 | aliguori | ret = ioctl(s->vmfd, type, arg); |
895 | 05330448 | aliguori | if (ret == -1) |
896 | 05330448 | aliguori | ret = -errno; |
897 | 05330448 | aliguori | |
898 | 05330448 | aliguori | return ret;
|
899 | 05330448 | aliguori | } |
900 | 05330448 | aliguori | |
901 | 984b5181 | aliguori | int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
902 | 05330448 | aliguori | { |
903 | 05330448 | aliguori | int ret;
|
904 | 984b5181 | aliguori | void *arg;
|
905 | 984b5181 | aliguori | va_list ap; |
906 | 984b5181 | aliguori | |
907 | 984b5181 | aliguori | va_start(ap, type); |
908 | 984b5181 | aliguori | arg = va_arg(ap, void *);
|
909 | 984b5181 | aliguori | va_end(ap); |
910 | 05330448 | aliguori | |
911 | 984b5181 | aliguori | ret = ioctl(env->kvm_fd, type, arg); |
912 | 05330448 | aliguori | if (ret == -1) |
913 | 05330448 | aliguori | ret = -errno; |
914 | 05330448 | aliguori | |
915 | 05330448 | aliguori | return ret;
|
916 | 05330448 | aliguori | } |
917 | bd322087 | aliguori | |
918 | bd322087 | aliguori | int kvm_has_sync_mmu(void) |
919 | bd322087 | aliguori | { |
920 | a9c11522 | aurel32 | #ifdef KVM_CAP_SYNC_MMU
|
921 | bd322087 | aliguori | KVMState *s = kvm_state; |
922 | bd322087 | aliguori | |
923 | ad7b8b33 | Anthony Liguori | return kvm_check_extension(s, KVM_CAP_SYNC_MMU);
|
924 | ad7b8b33 | Anthony Liguori | #else
|
925 | bd322087 | aliguori | return 0; |
926 | ad7b8b33 | Anthony Liguori | #endif
|
927 | bd322087 | aliguori | } |
928 | e22a25c9 | aliguori | |
929 | a0fb002c | Jan Kiszka | int kvm_has_vcpu_events(void) |
930 | a0fb002c | Jan Kiszka | { |
931 | a0fb002c | Jan Kiszka | return kvm_state->vcpu_events;
|
932 | a0fb002c | Jan Kiszka | } |
933 | a0fb002c | Jan Kiszka | |
934 | b0b1d690 | Jan Kiszka | int kvm_has_robust_singlestep(void) |
935 | b0b1d690 | Jan Kiszka | { |
936 | b0b1d690 | Jan Kiszka | return kvm_state->robust_singlestep;
|
937 | b0b1d690 | Jan Kiszka | } |
938 | b0b1d690 | Jan Kiszka | |
939 | 6f0437e8 | Jan Kiszka | void kvm_setup_guest_memory(void *start, size_t size) |
940 | 6f0437e8 | Jan Kiszka | { |
941 | 6f0437e8 | Jan Kiszka | if (!kvm_has_sync_mmu()) {
|
942 | 6f0437e8 | Jan Kiszka | #ifdef MADV_DONTFORK
|
943 | 6f0437e8 | Jan Kiszka | int ret = madvise(start, size, MADV_DONTFORK);
|
944 | 6f0437e8 | Jan Kiszka | |
945 | 6f0437e8 | Jan Kiszka | if (ret) {
|
946 | 6f0437e8 | Jan Kiszka | perror("madvice");
|
947 | 6f0437e8 | Jan Kiszka | exit(1);
|
948 | 6f0437e8 | Jan Kiszka | } |
949 | 6f0437e8 | Jan Kiszka | #else
|
950 | 6f0437e8 | Jan Kiszka | fprintf(stderr, |
951 | 6f0437e8 | Jan Kiszka | "Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
952 | 6f0437e8 | Jan Kiszka | exit(1);
|
953 | 6f0437e8 | Jan Kiszka | #endif
|
954 | 6f0437e8 | Jan Kiszka | } |
955 | 6f0437e8 | Jan Kiszka | } |
956 | 6f0437e8 | Jan Kiszka | |
957 | e22a25c9 | aliguori | #ifdef KVM_CAP_SET_GUEST_DEBUG
|
958 | fc5d642f | Luiz Capitulino | static void on_vcpu(CPUState *env, void (*func)(void *data), void *data) |
959 | fc5d642f | Luiz Capitulino | { |
960 | 828566bc | Glauber Costa | #ifdef CONFIG_IOTHREAD
|
961 | a2eebe88 | Amit Shah | if (env != cpu_single_env) {
|
962 | a2eebe88 | Amit Shah | abort(); |
963 | fc5d642f | Luiz Capitulino | } |
964 | 828566bc | Glauber Costa | #endif
|
965 | a2eebe88 | Amit Shah | func(data); |
966 | fc5d642f | Luiz Capitulino | } |
967 | fc5d642f | Luiz Capitulino | |
968 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
|
969 | e22a25c9 | aliguori | target_ulong pc) |
970 | e22a25c9 | aliguori | { |
971 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
972 | e22a25c9 | aliguori | |
973 | 72cf2d4f | Blue Swirl | QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
974 | e22a25c9 | aliguori | if (bp->pc == pc)
|
975 | e22a25c9 | aliguori | return bp;
|
976 | e22a25c9 | aliguori | } |
977 | e22a25c9 | aliguori | return NULL; |
978 | e22a25c9 | aliguori | } |
979 | e22a25c9 | aliguori | |
980 | e22a25c9 | aliguori | int kvm_sw_breakpoints_active(CPUState *env)
|
981 | e22a25c9 | aliguori | { |
982 | 72cf2d4f | Blue Swirl | return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
|
983 | e22a25c9 | aliguori | } |
984 | e22a25c9 | aliguori | |
985 | 452e4751 | Glauber Costa | struct kvm_set_guest_debug_data {
|
986 | 452e4751 | Glauber Costa | struct kvm_guest_debug dbg;
|
987 | 452e4751 | Glauber Costa | CPUState *env; |
988 | 452e4751 | Glauber Costa | int err;
|
989 | 452e4751 | Glauber Costa | }; |
990 | 452e4751 | Glauber Costa | |
991 | 452e4751 | Glauber Costa | static void kvm_invoke_set_guest_debug(void *data) |
992 | 452e4751 | Glauber Costa | { |
993 | 452e4751 | Glauber Costa | struct kvm_set_guest_debug_data *dbg_data = data;
|
994 | b3807725 | Jan Kiszka | CPUState *env = dbg_data->env; |
995 | b3807725 | Jan Kiszka | |
996 | b3807725 | Jan Kiszka | dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
997 | 452e4751 | Glauber Costa | } |
998 | 452e4751 | Glauber Costa | |
999 | e22a25c9 | aliguori | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1000 | e22a25c9 | aliguori | { |
1001 | 452e4751 | Glauber Costa | struct kvm_set_guest_debug_data data;
|
1002 | e22a25c9 | aliguori | |
1003 | b0b1d690 | Jan Kiszka | data.dbg.control = reinject_trap; |
1004 | e22a25c9 | aliguori | |
1005 | b0b1d690 | Jan Kiszka | if (env->singlestep_enabled) {
|
1006 | b0b1d690 | Jan Kiszka | data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
1007 | b0b1d690 | Jan Kiszka | } |
1008 | 452e4751 | Glauber Costa | kvm_arch_update_guest_debug(env, &data.dbg); |
1009 | 452e4751 | Glauber Costa | data.env = env; |
1010 | e22a25c9 | aliguori | |
1011 | 452e4751 | Glauber Costa | on_vcpu(env, kvm_invoke_set_guest_debug, &data); |
1012 | 452e4751 | Glauber Costa | return data.err;
|
1013 | e22a25c9 | aliguori | } |
1014 | e22a25c9 | aliguori | |
1015 | e22a25c9 | aliguori | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1016 | e22a25c9 | aliguori | target_ulong len, int type)
|
1017 | e22a25c9 | aliguori | { |
1018 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
1019 | e22a25c9 | aliguori | CPUState *env; |
1020 | e22a25c9 | aliguori | int err;
|
1021 | e22a25c9 | aliguori | |
1022 | e22a25c9 | aliguori | if (type == GDB_BREAKPOINT_SW) {
|
1023 | e22a25c9 | aliguori | bp = kvm_find_sw_breakpoint(current_env, addr); |
1024 | e22a25c9 | aliguori | if (bp) {
|
1025 | e22a25c9 | aliguori | bp->use_count++; |
1026 | e22a25c9 | aliguori | return 0; |
1027 | e22a25c9 | aliguori | } |
1028 | e22a25c9 | aliguori | |
1029 | e22a25c9 | aliguori | bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
1030 | e22a25c9 | aliguori | if (!bp)
|
1031 | e22a25c9 | aliguori | return -ENOMEM;
|
1032 | e22a25c9 | aliguori | |
1033 | e22a25c9 | aliguori | bp->pc = addr; |
1034 | e22a25c9 | aliguori | bp->use_count = 1;
|
1035 | e22a25c9 | aliguori | err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
1036 | e22a25c9 | aliguori | if (err) {
|
1037 | e22a25c9 | aliguori | free(bp); |
1038 | e22a25c9 | aliguori | return err;
|
1039 | e22a25c9 | aliguori | } |
1040 | e22a25c9 | aliguori | |
1041 | 72cf2d4f | Blue Swirl | QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
1042 | e22a25c9 | aliguori | bp, entry); |
1043 | e22a25c9 | aliguori | } else {
|
1044 | e22a25c9 | aliguori | err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
1045 | e22a25c9 | aliguori | if (err)
|
1046 | e22a25c9 | aliguori | return err;
|
1047 | e22a25c9 | aliguori | } |
1048 | e22a25c9 | aliguori | |
1049 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1050 | e22a25c9 | aliguori | err = kvm_update_guest_debug(env, 0);
|
1051 | e22a25c9 | aliguori | if (err)
|
1052 | e22a25c9 | aliguori | return err;
|
1053 | e22a25c9 | aliguori | } |
1054 | e22a25c9 | aliguori | return 0; |
1055 | e22a25c9 | aliguori | } |
1056 | e22a25c9 | aliguori | |
1057 | e22a25c9 | aliguori | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1058 | e22a25c9 | aliguori | target_ulong len, int type)
|
1059 | e22a25c9 | aliguori | { |
1060 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp;
|
1061 | e22a25c9 | aliguori | CPUState *env; |
1062 | e22a25c9 | aliguori | int err;
|
1063 | e22a25c9 | aliguori | |
1064 | e22a25c9 | aliguori | if (type == GDB_BREAKPOINT_SW) {
|
1065 | e22a25c9 | aliguori | bp = kvm_find_sw_breakpoint(current_env, addr); |
1066 | e22a25c9 | aliguori | if (!bp)
|
1067 | e22a25c9 | aliguori | return -ENOENT;
|
1068 | e22a25c9 | aliguori | |
1069 | e22a25c9 | aliguori | if (bp->use_count > 1) { |
1070 | e22a25c9 | aliguori | bp->use_count--; |
1071 | e22a25c9 | aliguori | return 0; |
1072 | e22a25c9 | aliguori | } |
1073 | e22a25c9 | aliguori | |
1074 | e22a25c9 | aliguori | err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
1075 | e22a25c9 | aliguori | if (err)
|
1076 | e22a25c9 | aliguori | return err;
|
1077 | e22a25c9 | aliguori | |
1078 | 72cf2d4f | Blue Swirl | QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
1079 | e22a25c9 | aliguori | qemu_free(bp); |
1080 | e22a25c9 | aliguori | } else {
|
1081 | e22a25c9 | aliguori | err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
1082 | e22a25c9 | aliguori | if (err)
|
1083 | e22a25c9 | aliguori | return err;
|
1084 | e22a25c9 | aliguori | } |
1085 | e22a25c9 | aliguori | |
1086 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1087 | e22a25c9 | aliguori | err = kvm_update_guest_debug(env, 0);
|
1088 | e22a25c9 | aliguori | if (err)
|
1089 | e22a25c9 | aliguori | return err;
|
1090 | e22a25c9 | aliguori | } |
1091 | e22a25c9 | aliguori | return 0; |
1092 | e22a25c9 | aliguori | } |
1093 | e22a25c9 | aliguori | |
1094 | e22a25c9 | aliguori | void kvm_remove_all_breakpoints(CPUState *current_env)
|
1095 | e22a25c9 | aliguori | { |
1096 | e22a25c9 | aliguori | struct kvm_sw_breakpoint *bp, *next;
|
1097 | e22a25c9 | aliguori | KVMState *s = current_env->kvm_state; |
1098 | e22a25c9 | aliguori | CPUState *env; |
1099 | e22a25c9 | aliguori | |
1100 | 72cf2d4f | Blue Swirl | QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
1101 | e22a25c9 | aliguori | if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1102 | e22a25c9 | aliguori | /* Try harder to find a CPU that currently sees the breakpoint. */
|
1103 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1104 | e22a25c9 | aliguori | if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) |
1105 | e22a25c9 | aliguori | break;
|
1106 | e22a25c9 | aliguori | } |
1107 | e22a25c9 | aliguori | } |
1108 | e22a25c9 | aliguori | } |
1109 | e22a25c9 | aliguori | kvm_arch_remove_all_hw_breakpoints(); |
1110 | e22a25c9 | aliguori | |
1111 | e22a25c9 | aliguori | for (env = first_cpu; env != NULL; env = env->next_cpu) |
1112 | e22a25c9 | aliguori | kvm_update_guest_debug(env, 0);
|
1113 | e22a25c9 | aliguori | } |
1114 | e22a25c9 | aliguori | |
1115 | e22a25c9 | aliguori | #else /* !KVM_CAP_SET_GUEST_DEBUG */ |
1116 | e22a25c9 | aliguori | |
1117 | e22a25c9 | aliguori | int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1118 | e22a25c9 | aliguori | { |
1119 | e22a25c9 | aliguori | return -EINVAL;
|
1120 | e22a25c9 | aliguori | } |
1121 | e22a25c9 | aliguori | |
1122 | e22a25c9 | aliguori | int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1123 | e22a25c9 | aliguori | target_ulong len, int type)
|
1124 | e22a25c9 | aliguori | { |
1125 | e22a25c9 | aliguori | return -EINVAL;
|
1126 | e22a25c9 | aliguori | } |
1127 | e22a25c9 | aliguori | |
1128 | e22a25c9 | aliguori | int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1129 | e22a25c9 | aliguori | target_ulong len, int type)
|
1130 | e22a25c9 | aliguori | { |
1131 | e22a25c9 | aliguori | return -EINVAL;
|
1132 | e22a25c9 | aliguori | } |
1133 | e22a25c9 | aliguori | |
1134 | e22a25c9 | aliguori | void kvm_remove_all_breakpoints(CPUState *current_env)
|
1135 | e22a25c9 | aliguori | { |
1136 | e22a25c9 | aliguori | } |
1137 | e22a25c9 | aliguori | #endif /* !KVM_CAP_SET_GUEST_DEBUG */ |
1138 | cc84de95 | Marcelo Tosatti | |
1139 | cc84de95 | Marcelo Tosatti | int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset) |
1140 | cc84de95 | Marcelo Tosatti | { |
1141 | cc84de95 | Marcelo Tosatti | struct kvm_signal_mask *sigmask;
|
1142 | cc84de95 | Marcelo Tosatti | int r;
|
1143 | cc84de95 | Marcelo Tosatti | |
1144 | cc84de95 | Marcelo Tosatti | if (!sigset)
|
1145 | cc84de95 | Marcelo Tosatti | return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); |
1146 | cc84de95 | Marcelo Tosatti | |
1147 | cc84de95 | Marcelo Tosatti | sigmask = qemu_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
1148 | cc84de95 | Marcelo Tosatti | |
1149 | cc84de95 | Marcelo Tosatti | sigmask->len = 8;
|
1150 | cc84de95 | Marcelo Tosatti | memcpy(sigmask->sigset, sigset, sizeof(*sigset));
|
1151 | cc84de95 | Marcelo Tosatti | r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); |
1152 | cc84de95 | Marcelo Tosatti | free(sigmask); |
1153 | cc84de95 | Marcelo Tosatti | |
1154 | cc84de95 | Marcelo Tosatti | return r;
|
1155 | cc84de95 | Marcelo Tosatti | } |