740b175973
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>
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef TIMERS_STATE_H
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#define TIMERS_STATE_H
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/* timers state, for sharing between icount and cpu-timers */
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typedef struct TimersState {
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/* Protected by BQL. */
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int64_t cpu_ticks_prev;
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int64_t cpu_ticks_offset;
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/*
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* Protect fields that can be respectively read outside the
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* BQL, and written from multiple threads.
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*/
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QemuSeqLock vm_clock_seqlock;
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QemuSpin vm_clock_lock;
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int16_t cpu_ticks_enabled;
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/* Conversion factor from emulated instructions to virtual clock ticks. */
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int16_t icount_time_shift;
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/* Compensate for varying guest execution speed. */
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int64_t qemu_icount_bias;
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int64_t vm_clock_warp_start;
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int64_t cpu_clock_offset;
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/* Only written by TCG thread */
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int64_t qemu_icount;
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/* for adjusting icount */
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QEMUTimer *icount_rt_timer;
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QEMUTimer *icount_vm_timer;
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QEMUTimer *icount_warp_timer;
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} TimersState;
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extern TimersState timers_state;
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/*
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* icount needs this internal from cpu-timers when adjusting the icount shift.
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*/
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int64_t cpu_get_clock_locked(void);
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#endif /* TIMERS_STATE_H */
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