Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9082
-gerrit
commit 12862b833f79f38c31f335a41fbc3e429ca51120 Author: Aaron Durbin adurbin@chromium.org Date: Wed Sep 17 12:00:57 2014 -0500
arm64: provide run on all cpu but self semantics
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: If8dd28ff7f34d93592ab2025a65a2fd665e4e608 Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: 9a4622f63a065f620f0c92ef92eeb2aa5c2b441d Original-Change-Id: Id18dc0423bcb0016ed36ace659b3f858e824c46c Original-Signed-off-by: Aaron Durbin adurbin@chromium.org Original-Reviewed-on: https://chromium-review.googlesource.com/218652 Original-Reviewed-by: Furquan Shaikh furquan@chromium.org --- src/arch/arm64/cpu.c | 25 +++++++++++++++++++++++++ src/arch/arm64/include/armv8/arch/cpu.h | 2 ++ 2 files changed, 27 insertions(+)
diff --git a/src/arch/arm64/cpu.c b/src/arch/arm64/cpu.c index 396c5b7..c0dc3c3 100644 --- a/src/arch/arm64/cpu.c +++ b/src/arch/arm64/cpu.c @@ -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(); diff --git a/src/arch/arm64/include/armv8/arch/cpu.h b/src/arch/arm64/include/armv8/arch/cpu.h index a5d20c4..d262385 100644 --- a/src/arch/arm64/include/armv8/arch/cpu.h +++ b/src/arch/arm64/include/armv8/arch/cpu.h @@ -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__ */