Commit 373af4ec authored by James Morse's avatar James Morse Committed by Borislav Petkov (AMD)
Browse files

x86/resctrl: Move RFTYPE flags to be managed by resctrl 



resctrl_file_fflags_init() is called from the architecture specific code to
make the 'thread_throttle_mode' file visible. The architecture specific code
has already set the membw.throttle_mode in the rdt_resource.

This forces the RFTYPE flags used by resctrl to be exposed to the architecture
specific code.

This doesn't need to be specific to the architecture, the throttle_mode can be
used by resctrl to determine if the 'thread_throttle_mode' file should be
visible. This allows the RFTYPE flags to be private to resctrl.

Add thread_throttle_mode_init(), and use it to call resctrl_file_fflags_init()
from resctrl_init(). This avoids publishing an extra function between the
architecture and filesystem code.

Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Reviewed-by: default avatarFenghua Yu <fenghuay@nvidia.com>
Reviewed-by: default avatarBabu Moger <babu.moger@amd.com>
Reviewed-by: default avatarShaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: default avatarPeter Newman <peternewman@google.com>
Tested-by: default avatarShaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Amit Singh Tomar <amitsinght@marvell.com> # arm64
Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> # arm64
Tested-by: default avatarBabu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/r/20250311183715.16445-28-james.morse@arm.com
parent 4cf9acfc

arch/x86/kernel/cpu/resctrl/core.c

+0 −3
Original line number Diff line number Diff line
@@ -227,9 +227,6 @@ static __init bool __get_mem_config_intel(struct rdt_resource *r) 
	else

		r->membw.throttle_mode = THREAD_THROTTLE_MAX;



	resctrl_file_fflags_init("thread_throttle_mode",

				 RFTYPE_CTRL_INFO | RFTYPE_RES_MB);



	r->alloc_capable = true;



	return true;

arch/x86/kernel/cpu/resctrl/rdtgroup.c

+12 −0
Original line number Diff line number Diff line
@@ -2064,6 +2064,16 @@ static struct rftype *rdtgroup_get_rftype_by_name(const char *name) 
	return NULL;

}



static void thread_throttle_mode_init(void)

{

	struct rdt_resource *r_mba;



	r_mba = resctrl_arch_get_resource(RDT_RESOURCE_MBA);

	if (r_mba->membw.throttle_mode != THREAD_THROTTLE_UNDEFINED)

		resctrl_file_fflags_init("thread_throttle_mode",

					 RFTYPE_CTRL_INFO | RFTYPE_RES_MB);

}



void resctrl_file_fflags_init(const char *config, unsigned long fflags)

{

	struct rftype *rft;
@@ -4277,6 +4287,8 @@ int __init resctrl_init(void) 


	rdtgroup_setup_default();



	thread_throttle_mode_init();



	ret = resctrl_mon_resource_init();

	if (ret)

		return ret;