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accel/tcg: Precompute curr_cflags into cpu->tcg_cflags

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The primary motivation is to remove a dozen insns along
the fast-path in tb_lookup.  As a byproduct, this allows
us to completely remove parallel_cpus.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-03-01 19:21:08 -08:00
parent 872ebd884d
commit 6cc9d67c6f
11 changed files with 30 additions and 27 deletions
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2
include/hw/core/cpu.h
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@ -282,6 +282,7 @@ struct qemu_work_item;
* to a cluster this will be UNASSIGNED_CLUSTER_INDEX; otherwise it will
* be the same as the cluster-id property of the CPU object's TYPE_CPU_CLUSTER
* QOM parent.
* @tcg_cflags: Pre-computed cflags for this cpu.
* @nr_cores: Number of cores within this CPU package.
* @nr_threads: Number of threads within this CPU.
* @running: #true if CPU is currently running (lockless).
@ -412,6 +413,7 @@ struct CPUState {
/* TODO Move common fields from CPUArchState here. */
int cpu_index;
int cluster_index;
uint32_t tcg_cflags;
uint32_t halted;
uint32_t can_do_io;
int32_t exception_index;