cpu-timers, icount: new modules

refactoring of cpus.c continues with cpu timer state extraction.

cpu-timers: responsible for the softmmu cpu timers state,
            including cpu clocks and ticks.

icount: counts the TCG instructions executed. As such it is specific to
the TCG accelerator. Therefore, it is built only under CONFIG_TCG.

One complication is due to qtest, which uses an icount field to warp time
as part of qtest (qtest_clock_warp).

In order to solve this problem, provide a separate counter for qtest.

This requires fixing assumptions scattered in the code that
qtest_enabled() implies icount_enabled(), checking each specific case.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[remove redundant initialization with qemu_spice_init]
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
[fix lingering calls to icount_get]
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/stubs/icount.c b/stubs/icount.c
new file mode 100644
index 0000000000..61e28cbaf9
--- /dev/null
+++ b/stubs/icount.c
@@ -0,0 +1,45 @@
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "sysemu/cpu-timers.h"
+
+/* icount - Instruction Counter API */
+
+int use_icount;
+
+void cpu_update_icount(CPUState *cpu)
+{
+    abort();
+}
+void configure_icount(QemuOpts *opts, Error **errp)
+{
+    /* signal error */
+    error_setg(errp, "cannot configure icount, TCG support not available");
+}
+int64_t cpu_get_icount_raw(void)
+{
+    abort();
+    return 0;
+}
+int64_t cpu_get_icount(void)
+{
+    abort();
+    return 0;
+}
+int64_t cpu_icount_to_ns(int64_t icount)
+{
+    abort();
+    return 0;
+}
+int64_t qemu_icount_round(int64_t count)
+{
+    abort();
+    return 0;
+}
+void qemu_start_warp_timer(void)
+{
+    abort();
+}
+void qemu_account_warp_timer(void)
+{
+    abort();
+}