Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 53a114a6 authored by Shaohua Li's avatar Shaohua Li Committed by Thomas Gleixner
Browse files

x86/intel_rdt: Export the minimum number of set mask bits in sysfs 



The minimum number of bits set for a cache mask is checked by the kernel
when writing a mask, but there is no way for the user to retrieve this
information.

Add a new file 'min_cbm_bits' to the info directory and export the
information to user space.

[ tglx: Massaged changelog ]
Signed-off-by: default avatarShaohua Li <shli@fb.com>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Link: http://lkml.kernel.org/r/e69b1ffa206d0353eea58101e1bf9b677d9732f7.1478207143.git.shli@fb.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 7bff0af5

arch/x86/kernel/cpu/intel_rdt_rdtgroup.c

+16 −0
Original line number Diff line number Diff line
@@ -472,6 +472,16 @@ static int rdt_cbm_mask_show(struct kernfs_open_file *of, 
	return 0;

}



static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,

			     struct seq_file *seq, void *v)

{

	struct rdt_resource *r = of->kn->parent->priv;



	seq_printf(seq, "%d\n", r->min_cbm_bits);



	return 0;

}



/* rdtgroup information files for one cache resource. */

static struct rftype res_info_files[] = {

	{
@@ -486,6 +496,12 @@ static struct rftype res_info_files[] = { 
		.kf_ops		= &rdtgroup_kf_single_ops,

		.seq_show	= rdt_cbm_mask_show,

	},

	{

		.name		= "min_cbm_bits",

		.mode		= 0444,

		.kf_ops		= &rdtgroup_kf_single_ops,

		.seq_show	= rdt_min_cbm_bits_show,

	},

};



static int rdtgroup_create_info_dir(struct kernfs_node *parent_kn)