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authorJason Andryuk <jandryuk@gmail.com>2020-10-13 10:05:10 -0400
committerThomas Huth <thuth@redhat.com>2020-10-24 07:23:19 +0200
commit9ce84a0d17d015f059a6750fbbf4b057806751df (patch)
tree22dc336b897d1c3844e46a34d3d6a44a0338e9fa /accel/dummy-cpus.c
parenta6b0882ca75b62b2c0840578f790ab65844b749e (diff)
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accel: move qtest CpusAccel functions to a common location
Move and rename accel/qtest/qtest-cpus.c files to accel/dummy-cpus.c so it can be re-used by Xen. Signed-off-by: Jason Andryuk <jandryuk@gmail.com> Message-Id: <20201013140511.5681-3-jandryuk@gmail.com> Reviewed-by: Claudio Fontana <cfontana@suse.de> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'accel/dummy-cpus.c')
-rw-r--r--accel/dummy-cpus.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/accel/dummy-cpus.c b/accel/dummy-cpus.c
new file mode 100644
index 0000000..10429fd
--- /dev/null
+++ b/accel/dummy-cpus.c
@@ -0,0 +1,72 @@
+/*
+ * Dummy cpu thread code
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * 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 "qemu/rcu.h"
+#include "sysemu/cpus.h"
+#include "qemu/guest-random.h"
+#include "qemu/main-loop.h"
+#include "hw/core/cpu.h"
+
+static void *dummy_cpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+ sigset_t waitset;
+ int r;
+
+ rcu_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+ cpu->thread_id = qemu_get_thread_id();
+ cpu->can_do_io = 1;
+ current_cpu = cpu;
+
+ sigemptyset(&waitset);
+ sigaddset(&waitset, SIG_IPI);
+
+ /* signal CPU creation */
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ do {
+ qemu_mutex_unlock_iothread();
+ do {
+ int sig;
+ r = sigwait(&waitset, &sig);
+ } while (r == -1 && (errno == EAGAIN || errno == EINTR));
+ if (r == -1) {
+ perror("sigwait");
+ exit(1);
+ }
+ qemu_mutex_lock_iothread();
+ qemu_wait_io_event(cpu);
+ } while (!cpu->unplug);
+
+ qemu_mutex_unlock_iothread();
+ rcu_unregister_thread();
+ return NULL;
+}
+
+void dummy_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/DUMMY",
+ cpu->cpu_index);
+ qemu_thread_create(cpu->thread, thread_name, dummy_cpu_thread_fn, cpu,
+ QEMU_THREAD_JOINABLE);
+}