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Split icount stuff from system/cpu-timers.h. There are 17 files which only require icount.h, 7 that only require cpu-timers.h, and 7 that require both. Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>pull/291/head
Richard Henderson
1 year ago
26 changed files with 92 additions and 75 deletions
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/*
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* icount - Instruction Counter API |
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* CPU timers state API |
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* |
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* Copyright 2020 SUSE LLC |
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* SPDX-License-Identifier: GPL-2.0-or-later |
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*/ |
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#ifndef EXEC_ICOUNT_H |
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#define EXEC_ICOUNT_H |
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/**
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* ICountMode: icount enablement state: |
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* |
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* @ICOUNT_DISABLED: Disabled - Do not count executed instructions. |
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* @ICOUNT_PRECISE: Enabled - Fixed conversion of insn to ns via "shift" option |
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* @ICOUNT_ADAPTATIVE: Enabled - Runtime adaptive algorithm to compute shift |
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*/ |
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typedef enum { |
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ICOUNT_DISABLED = 0, |
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ICOUNT_PRECISE, |
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ICOUNT_ADAPTATIVE, |
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} ICountMode; |
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#if defined(CONFIG_TCG) && !defined(CONFIG_USER_ONLY) |
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extern ICountMode use_icount; |
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#define icount_enabled() (use_icount) |
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#else |
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#define icount_enabled() ICOUNT_DISABLED |
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#endif |
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/*
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* Update the icount with the executed instructions. Called by |
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* cpus-tcg vCPU thread so the main-loop can see time has moved forward. |
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*/ |
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void icount_update(CPUState *cpu); |
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/* get raw icount value */ |
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int64_t icount_get_raw(void); |
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/* return the virtual CPU time in ns, based on the instruction counter. */ |
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int64_t icount_get(void); |
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/*
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* convert an instruction counter value to ns, based on the icount shift. |
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* This shift is set as a fixed value with the icount "shift" option |
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* (precise mode), or it is constantly approximated and corrected at |
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* runtime in adaptive mode. |
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*/ |
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int64_t icount_to_ns(int64_t icount); |
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/**
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* icount_configure: configure the icount options, including "shift" |
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* @opts: Options to parse |
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* @errp: pointer to a NULL-initialized error object |
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* |
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* Return: true on success, else false setting @errp with error |
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*/ |
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bool icount_configure(QemuOpts *opts, Error **errp); |
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/* used by tcg vcpu thread to calc icount budget */ |
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int64_t icount_round(int64_t count); |
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/* if the CPUs are idle, start accounting real time to virtual clock. */ |
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void icount_start_warp_timer(void); |
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void icount_account_warp_timer(void); |
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void icount_notify_exit(void); |
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#endif /* EXEC_ICOUNT_H */ |
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