On Sat, May 11, 2024 at 12:43:28PM +0200, Aleksandar Rikalo wrote: > From: Paul Burton <paulburton@xxxxxxxxxx> > > This patch introduces a couple of utility functions which help later > patches with introducing support for multi-cluster systems. > > - mips_cps_multicluster_cpus() allows its caller to determine whether > the system includes CPUs spread across multiple clusters. This is > useful because in some cases behaviour can be more optimal taking > this knowledge into account. The means by which we check this is > dependent upon the way we probe CPUs & assign their numbers, so > keeping this knowledge confined here in arch/mips/ seems appropriate. > > - mips_cps_first_online_in_cluster() allows its caller to determine > whether it is running upon the first CPU online within its cluster. > This information is useful in cases where some cluster-wide > configuration may need to occur, but should not be repeated if > another CPU in the cluster is already online. Similarly to the above > this is determined based upon knowledge of CPU numbering so it makes > sense to keep that knowledge in arch/mips/. The function is defined > in mips-cm.c rather than in asm/mips-cps.h in order to allow us to > use asm/cpu-info.h & linux/smp.h without encountering an include > nightmare. > > Signed-off-by: Paul Burton <paulburton@xxxxxxxxxx> > Signed-off-by: Chao-ying Fu <cfu@xxxxxxxxxxxx> > Signed-off-by: Dragan Mladjenovic <dragan.mladjenovic@xxxxxxxxxx> > Signed-off-by: Aleksandar Rikalo <aleksandar.rikalo@xxxxxxxxxx> > --- > arch/mips/include/asm/mips-cps.h | 38 ++++++++++++++++++++++++++++++++ > arch/mips/kernel/mips-cm.c | 37 +++++++++++++++++++++++++++++++ > 2 files changed, 75 insertions(+) applied to mips-next with a #include <linux/cpumask.h> added to make it compile with my malta config. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
