Messages in this thread | | | Date | Mon, 27 Mar 2023 15:04:15 +0100 | From | Conor Dooley <> | Subject | Re: [PATCH 1/3] cacheinfo: Check sib_leaf in cache_leaves_are_shared() |
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On Mon, Mar 27, 2023 at 01:59:49PM +0200, Pierre Gondois wrote: > If 'this_leaf' is a L2 cache (or higher) and 'sib_leaf' is a L1 cache, > the caches are detected as shared. > Indeed, cache_leaves_are_shared() only checks the cache level of > 'this_leaf' when 'sib_leaf''s cache level should also be checked.
nit: this commit message reads quite weirdly as there's a missing "do foo" statement, followed by "also do bar".
> > Also update the comment: the function is called when populating > 'shared_cpu_map'. > > Signed-off-by: Pierre Gondois <pierre.gondois@arm.com> > --- > drivers/base/cacheinfo.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c > index f6573c335f4c..4ca117574af1 100644 > --- a/drivers/base/cacheinfo.c > +++ b/drivers/base/cacheinfo.c > @@ -38,11 +38,10 @@ static inline bool cache_leaves_are_shared(struct cacheinfo *this_leaf, > { > /* > * For non DT/ACPI systems, assume unique level 1 caches, > - * system-wide shared caches for all other levels. This will be used > - * only if arch specific code has not populated shared_cpu_map > + * system-wide shared caches for all other levels. > */ > if (!(IS_ENABLED(CONFIG_OF) || IS_ENABLED(CONFIG_ACPI))) > - return !(this_leaf->level == 1); > + return (this_leaf->level != 1) || (sib_leaf->level != 1);
So this is Fixes: f16d1becf96f ("cacheinfo: Use cache identifiers to check if the caches are shared if available") then?
Cheers, Conor.
> > if ((sib_leaf->attributes & CACHE_ID) && > (this_leaf->attributes & CACHE_ID)) > -- > 2.25.1 > > [unhandled content-type:application/pgp-signature] | |