cpu-exec: Migrate some generic fns to cpu-exec-common
The goal is to split the functions such that cpu-exec is CPU specific
content, while cpus-exec-common.c is generic code only. The function
interface to cpu-exec needs to be virtualised to prepare support for
multi-arch and moving these definitions out saves bloating the QOM
interface. So move these definitions out of cpu-exec to a new module,
cpu-exec-common.
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Message-Id: <3cefeb3fbbb33031670951a0e74de2778529da3f.1441614289.git.crosthwaite.peter@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/cpu-exec-common.c b/cpu-exec-common.c
new file mode 100644
index 0000000..16d305b
--- /dev/null
+++ b/cpu-exec-common.c
@@ -0,0 +1,81 @@
+/*
+ * emulator main execution loop
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+#include "cpu.h"
+#include "sysemu/cpus.h"
+#include "exec/memory-internal.h"
+
+bool exit_request;
+CPUState *tcg_current_cpu;
+
+/* exit the current TB from a signal handler. The host registers are
+ restored in a state compatible with the CPU emulator
+ */
+#if defined(CONFIG_SOFTMMU)
+void cpu_resume_from_signal(CPUState *cpu, void *puc)
+{
+ /* XXX: restore cpu registers saved in host registers */
+
+ cpu->exception_index = -1;
+ siglongjmp(cpu->jmp_env, 1);
+}
+
+void cpu_reload_memory_map(CPUState *cpu)
+{
+ AddressSpaceDispatch *d;
+
+ if (qemu_in_vcpu_thread()) {
+ /* Do not let the guest prolong the critical section as much as it
+ * as it desires.
+ *
+ * Currently, this is prevented by the I/O thread's periodinc kicking
+ * of the VCPU thread (iothread_requesting_mutex, qemu_cpu_kick_thread)
+ * but this will go away once TCG's execution moves out of the global
+ * mutex.
+ *
+ * This pair matches cpu_exec's rcu_read_lock()/rcu_read_unlock(), which
+ * only protects cpu->as->dispatch. Since we reload it below, we can
+ * split the critical section.
+ */
+ rcu_read_unlock();
+ rcu_read_lock();
+ }
+
+ /* The CPU and TLB are protected by the iothread lock. */
+ d = atomic_rcu_read(&cpu->as->dispatch);
+ cpu->memory_dispatch = d;
+ tlb_flush(cpu, 1);
+}
+#endif
+
+void cpu_loop_exit(CPUState *cpu)
+{
+ cpu->current_tb = NULL;
+ siglongjmp(cpu->jmp_env, 1);
+}
+
+void cpu_loop_exit_restore(CPUState *cpu, uintptr_t pc)
+{
+ if (pc) {
+ cpu_restore_state(cpu, pc);
+ }
+ cpu->current_tb = NULL;
+ siglongjmp(cpu->jmp_env, 1);
+}
