Re: [PATCH 1/2] powerpc: Detect the presence of big-core with interleaved threads

Hello Michael, On Fri, May 18, 2018 at 11:21:22PM +1000, Michael Ellerman wrote: > "Gautham R. Shenoy" writes: > > > diff --git a/arch/powerpc/kernel/setup-common.c > > b/arch/powerpc/kernel/setup-common.c > > index 0af5c11..884dff2 100644 > > --- a/arch/powerpc/kernel/setup-common.c > > +++ b/

Re: [PATCH 1/2] powerpc: Detect the presence of big-core with interleaved threads

Hello Michael, On Fri, May 18, 2018 at 11:14:04PM +1000, Michael Ellerman wrote: > Gautham R Shenoy writes: > ... > >> > @@ -565,7 +615,16 @@ void __init smp_setup_cpu_maps(void) > >> > vdso_data->processorCount = num_present_cpus(); > >> > #endif /* CONFIG_PPC64 */ > >> > > >> > -

Re: [PATCH 1/2] powerpc: Detect the presence of big-core with interleaved threads

"Gautham R. Shenoy" writes: > diff --git a/arch/powerpc/kernel/setup-common.c > b/arch/powerpc/kernel/setup-common.c > index 0af5c11..884dff2 100644 > --- a/arch/powerpc/kernel/setup-common.c > +++ b/arch/powerpc/kernel/setup-common.c > @@ -436,8 +438,56 @@ static void __init cpu_init_thread_cor

Re: [PATCH 1/2] powerpc: Detect the presence of big-core with interleaved threads

Gautham R Shenoy writes: ... >> > @@ -565,7 +615,16 @@ void __init smp_setup_cpu_maps(void) >> >vdso_data->processorCount = num_present_cpus(); >> > #endif /* CONFIG_PPC64 */ >> > >> > -/* Initialize CPU <=> thread mapping/ >> > + dn = of_find_node_by_type(NULL, "cpu"); >> > + if

Re: [PATCH 1/2] powerpc: Detect the presence of big-core with interleaved threads

Hi Mikey, On Mon, May 14, 2018 at 01:21:11PM +1000, Michael Neuling wrote: > Thanks for posting this... A couple of comments below. Thanks for the review. Replies below. > > +/* > > + * check_for_interleaved_big_core - Checks if the core represented by > > + * dn is a big-core whose threads are

Re: [PATCH 1/2] powerpc: Detect the presence of big-core with interleaved threads

Thanks for posting this... A couple of comments below. On Fri, 2018-05-11 at 16:47 +0530, Gautham R. Shenoy wrote: > From: "Gautham R. Shenoy" > > A pair of IBM POWER9 SMT4 cores can be fused together to form a > big-core with 8 SMT threads. This can be discovered via the > "ibm,thread-groups" C

[PATCH 1/2] powerpc: Detect the presence of big-core with interleaved threads

From: "Gautham R. Shenoy" A pair of IBM POWER9 SMT4 cores can be fused together to form a big-core with 8 SMT threads. This can be discovered via the "ibm,thread-groups" CPU property in the device tree which will indicate which group of threads that share the L1 cache, translation cache and instr