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, 4 insertions, 2 deletions

diff --git a/softmmu/vl.c b/softmmu/vl.c
index 22bc570df4..6a1ee531db 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -74,6 +74,7 @@
 #include "hw/audio/soundhw.h"
 #include "audio/audio.h"
 #include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
 #include "migration/colo.h"
 #include "migration/postcopy-ram.h"
 #include "sysemu/kvm.h"
@@ -2804,7 +2805,7 @@ static void configure_accelerators(const char *progname)
         error_report("falling back to %s", ac->name);
     }
 
-    if (use_icount && !(tcg_enabled() || qtest_enabled())) {
+    if (icount_enabled() && !tcg_enabled()) {
         error_report("-icount is not allowed with hardware virtualization");
         exit(1);
     }
@@ -4254,7 +4255,8 @@ void qemu_init(int argc, char **argv, char **envp)
         semihosting_arg_fallback(kernel_filename, kernel_cmdline);
     }
 
-    cpu_ticks_init();
+    /* initialize cpu timers and VCPU throttle modules */
+    cpu_timers_init();
 
     if (default_net) {
         QemuOptsList *net = qemu_find_opts("net");