x86/resctrl: Split struct rdt_domain
authorJames Morse <james.morse@arm.com>
Wed, 28 Jul 2021 17:06:15 +0000 (17:06 +0000)
committerBorislav Petkov <bp@suse.de>
Wed, 11 Aug 2021 10:00:43 +0000 (12:00 +0200)
commit792e0f6f789bda5e31b1dbcfcc84068da36a79b1
tree2f9bd1b5a0953e85321ed697f9e258f007979245
parent63c8b1231929b8aa80abc753c1c91b6b49e2c0b0
x86/resctrl: Split struct rdt_domain

resctrl is the defacto Linux ABI for SoC resource partitioning features.

To support it on another architecture, it needs to be abstracted from
the features provided by Intel RDT and AMD PQoS, and moved to /fs/.
struct rdt_domain contains a mix of architecture private details and
properties of the filesystem interface user-space uses.

Continue by splitting struct rdt_domain, into an architecture private
'hw' struct, which contains the common resctrl structure that would be
used by any architecture. The hardware values in ctrl_val and mbps_val
need to be accessed via helpers to allow another architecture to convert
these into a different format if necessary. After this split, filesystem
code paths touching a 'hw' struct indicates where an abstraction is
needed.

Splitting this structure only moves types around, and should not lead
to any change in behaviour.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-3-james.morse@arm.com
arch/x86/kernel/cpu/resctrl/core.c
arch/x86/kernel/cpu/resctrl/ctrlmondata.c
arch/x86/kernel/cpu/resctrl/internal.h
arch/x86/kernel/cpu/resctrl/monitor.c
arch/x86/kernel/cpu/resctrl/rdtgroup.c
include/linux/resctrl.h