1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
$NetBSD: patch-target_i386_nvmm_cpus.c,v 1.1 2021/03/06 11:19:34 reinoud Exp $
--- target/i386/nvmm-cpus.c.orig 2021-03-05 16:55:06.648916883 +0000
+++ target/i386/nvmm-cpus.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2018-2019 Maxime Villard, All rights reserved.
+ *
+ * NetBSD Virtual Machine Monitor (NVMM) accelerator for QEMU.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "sysemu/kvm_int.h"
+#include "qemu/main-loop.h"
+#include "sysemu/cpus.h"
+#include "qemu/guest-random.h"
+
+#include "sysemu/nvmm.h"
+#include "nvmm-cpus.h"
+
+static void *qemu_nvmm_cpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+ int r;
+
+ assert(nvmm_enabled());
+
+ rcu_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+ cpu->thread_id = qemu_get_thread_id();
+ current_cpu = cpu;
+
+ r = nvmm_init_vcpu(cpu);
+ if (r < 0) {
+ fprintf(stderr, "nvmm_init_vcpu failed: %s\n", strerror(-r));
+ exit(1);
+ }
+
+ /* signal CPU creation */
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ do {
+ if (cpu_can_run(cpu)) {
+ r = nvmm_vcpu_exec(cpu);
+ if (r == EXCP_DEBUG) {
+ cpu_handle_guest_debug(cpu);
+ }
+ }
+ while (cpu_thread_is_idle(cpu)) {
+ qemu_cond_wait_iothread(cpu->halt_cond);
+ }
+ qemu_wait_io_event_common(cpu);
+ } while (!cpu->unplug || cpu_can_run(cpu));
+
+ nvmm_destroy_vcpu(cpu);
+ cpu_thread_signal_destroyed(cpu);
+ qemu_mutex_unlock_iothread();
+ rcu_unregister_thread();
+ return NULL;
+}
+
+static void nvmm_start_vcpu_thread(CPUState *cpu)
+{
+ char thread_name[VCPU_THREAD_NAME_SIZE];
+
+ cpu->thread = g_malloc0(sizeof(QemuThread));
+ cpu->halt_cond = g_malloc0(sizeof(QemuCond));
+ qemu_cond_init(cpu->halt_cond);
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/NVMM",
+ cpu->cpu_index);
+ qemu_thread_create(cpu->thread, thread_name, qemu_nvmm_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE);
+}
+
+/*
+ * Abort the call to run the virtual processor by another thread, and to
+ * return the control to that thread.
+ */
+static void nvmm_kick_vcpu_thread(CPUState *cpu)
+{
+ /*
+ * FIXME: race condition with the exit_request check in
+ * hax_vcpu_hax_exec
+ */
+
+ // if (!qemu_cpu_is_self(cpu)) {
+ cpu->exit_request = 1;
+ cpus_kick_thread(cpu);
+ //}
+}
+
+const CpusAccel nvmm_cpus = {
+ .create_vcpu_thread = nvmm_start_vcpu_thread,
+ .kick_vcpu_thread = nvmm_kick_vcpu_thread,
+ .synchronize_post_reset = nvmm_cpu_synchronize_post_reset,
+ .synchronize_post_init = nvmm_cpu_synchronize_post_init,
+ .synchronize_state = nvmm_cpu_synchronize_state,
+ .synchronize_pre_loadvm = nvmm_cpu_synchronize_pre_loadvm,
+};
|
