mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
7168ae330e
Resctrl is a filesystem interface to hardware that provides cache allocation policy and bandwidth control for groups of tasks or CPUs. To support more than one architecture, resctrl needs to live in /fs/. Move the code that is concerned with the filesystem interface to /fs/resctrl. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/20250515165855.31452-25-james.morse@arm.com
39 lines
1.4 KiB
Text
39 lines
1.4 KiB
Text
config RESCTRL_FS
|
|
bool "CPU Resource Control Filesystem (resctrl)"
|
|
depends on ARCH_HAS_CPU_RESCTRL
|
|
select KERNFS
|
|
select PROC_CPU_RESCTRL if PROC_FS
|
|
help
|
|
Some architectures provide hardware facilities to group tasks and
|
|
monitor and control their usage of memory system resources such as
|
|
caches and memory bandwidth. Examples of such facilities include
|
|
Intel's Resource Director Technology (Intel(R) RDT) and AMD's
|
|
Platform Quality of Service (AMD QoS).
|
|
|
|
If your system has the necessary support and you want to be able to
|
|
assign tasks to groups and manipulate the associated resource
|
|
monitors and controls from userspace, say Y here to get a mountable
|
|
'resctrl' filesystem that lets you do just that.
|
|
|
|
If nothing mounts or prods the 'resctrl' filesystem, resource
|
|
controls and monitors are left in a quiescent, permissive state.
|
|
|
|
On architectures where this can be disabled independently, it is
|
|
safe to say N.
|
|
|
|
See <file:Documentation/filesystems/resctrl.rst> for more information.
|
|
|
|
config RESCTRL_FS_PSEUDO_LOCK
|
|
bool
|
|
depends on RESCTRL_FS
|
|
help
|
|
Software mechanism to pin data in a cache portion using
|
|
micro-architecture specific knowledge.
|
|
|
|
config RESCTRL_RMID_DEPENDS_ON_CLOSID
|
|
bool
|
|
depends on RESCTRL_FS
|
|
help
|
|
Enabled by the architecture when the RMID values depend on the CLOSID.
|
|
This causes the CLOSID allocator to search for CLOSID with clean
|
|
RMID.
|