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arm64: provide run on all cpu but self semantics

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In order to provide richer semantics for running code
on all CPUs add an all-but-self construct.

BUG=chrome-os-partner:32082
BRANCH=None
TEST=Built and booted to kernel.

Change-Id: Id18dc0423bcb0016ed36ace659b3f858e824c46c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/218652
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
This commit is contained in:
Aaron Durbin 2014-09-17 12:00:57 -05:00 • committed by chrome-internal-fetch
commit 9a4622f63a
2 changed files with 27 additions and 0 deletions
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25
src/arch/arm64/cpu.c
View file

@ -297,6 +297,21 @@ static int __arch_run_on_all_cpus(struct cpu_action *action, int sync)
return 0;
}
static int __arch_run_on_all_cpus_but_self(struct cpu_action *action, int sync)
{
int i;
struct cpu_info *me = cpu_info();
for (i = 0; i < CONFIG_MAX_CPUS; i++) {
struct cpu_info *ci = cpu_info_for_cpu(i);
if (ci == me)
continue;
action_run_on_cpu(ci, action, sync);
}
return 0;
}
int arch_run_on_all_cpus(struct cpu_action *action)
{
return __arch_run_on_all_cpus(action, 1);
@ -307,6 +322,16 @@ int arch_run_on_all_cpus_async(struct cpu_action *action)
return __arch_run_on_all_cpus(action, 0);
}
int arch_run_on_all_cpus_but_self(struct cpu_action *action)
{
return __arch_run_on_all_cpus_but_self(action, 1);
}
int arch_run_on_all_cpus_but_self_async(struct cpu_action *action)
{
return __arch_run_on_all_cpus_but_self(action, 0);
}
void arch_secondary_cpu_init(void)
{
struct cpu_info *ci = cpu_info();

2
src/arch/arm64/include/armv8/arch/cpu.h
View file

@ -94,8 +94,10 @@ void arch_initialize_cpus(device_t cluster, struct cpu_control_ops *cntrl_ops);
*/
int arch_run_on_cpu(unsigned int cpu, struct cpu_action *action);
int arch_run_on_all_cpus(struct cpu_action *action);
int arch_run_on_all_cpus_but_self(struct cpu_action *action);
int arch_run_on_cpu_async(unsigned int cpu, struct cpu_action *action);
int arch_run_on_all_cpus_async(struct cpu_action *action);
int arch_run_on_all_cpus_but_self_async(struct cpu_action *action);
#endif /* !__PRE_RAM__ */