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Message-ID: <f52c579262bbbc8bda4dbbb7341ad7bf0add0379.1752167718.git.babu.moger@amd.com>
Date: Thu, 10 Jul 2025 12:16:23 -0500
From: Babu Moger <babu.moger@....com>
To: <corbet@....net>, <tony.luck@...el.com>, <reinette.chatre@...el.com>,
<Dave.Martin@....com>, <james.morse@....com>, <tglx@...utronix.de>,
<mingo@...hat.com>, <bp@...en8.de>, <dave.hansen@...ux.intel.com>
CC: <x86@...nel.org>, <hpa@...or.com>, <akpm@...ux-foundation.org>,
<paulmck@...nel.org>, <rostedt@...dmis.org>, <Neeraj.Upadhyay@....com>,
<david@...hat.com>, <arnd@...db.de>, <fvdl@...gle.com>, <seanjc@...gle.com>,
<thomas.lendacky@....com>, <pawan.kumar.gupta@...ux.intel.com>,
<babu.moger@....com>, <yosry.ahmed@...ux.dev>, <sohil.mehta@...el.com>,
<xin@...or.com>, <kai.huang@...el.com>, <xiaoyao.li@...el.com>,
<peterz@...radead.org>, <me@...aill.net>, <mario.limonciello@....com>,
<xin3.li@...el.com>, <ebiggers@...gle.com>, <ak@...ux.intel.com>,
<chang.seok.bae@...el.com>, <andrew.cooper3@...rix.com>,
<perry.yuan@....com>, <linux-doc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH v7 09/10] fs/resctrl: Modify rdt_parse_data to pass mode and CLOSID
The functions parse_cbm() and parse_bw() require mode and CLOSID to
validate the Capacity Bit Mask (CBM). It is passed through struct
rdtgroup in rdt_parse_data.
This can be simplified by passing the mode and closid directly, instead of
through the rdtgroup struct. Doing so also facilitates calling parse_cbm()
to verify the CBM within the io_alloc feature, since io_alloc does not
have rdtgroup context.
Signed-off-by: Babu Moger <babu.moger@....com>
---
v7: Rephrase of changelog.
v6: Changed the subject line to fs/resctrl.
v5: Resolved conflicts due to recent resctrl FS/ARCH code restructure.
v4: New patch to call parse_cbm() directly to avoid code duplication.
---
fs/resctrl/ctrlmondata.c | 29 +++++++++++++----------------
fs/resctrl/internal.h | 6 ++++++
2 files changed, 19 insertions(+), 16 deletions(-)
diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c
index e78828b0408a..5c16557fb7a8 100644
--- a/fs/resctrl/ctrlmondata.c
+++ b/fs/resctrl/ctrlmondata.c
@@ -23,11 +23,6 @@
#include "internal.h"
-struct rdt_parse_data {
- struct rdtgroup *rdtgrp;
- char *buf;
-};
-
typedef int (ctrlval_parser_t)(struct rdt_parse_data *data,
struct resctrl_schema *s,
struct rdt_ctrl_domain *d);
@@ -77,8 +72,8 @@ static int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s,
struct rdt_ctrl_domain *d)
{
struct resctrl_staged_config *cfg;
- u32 closid = data->rdtgrp->closid;
struct rdt_resource *r = s->res;
+ u32 closid = data->closid;
u32 bw_val;
cfg = &d->staged_config[s->conf_type];
@@ -156,9 +151,10 @@ static bool cbm_validate(char *buf, u32 *data, struct rdt_resource *r)
static int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s,
struct rdt_ctrl_domain *d)
{
- struct rdtgroup *rdtgrp = data->rdtgrp;
+ enum rdtgrp_mode mode = data->mode;
struct resctrl_staged_config *cfg;
struct rdt_resource *r = s->res;
+ u32 closid = data->closid;
u32 cbm_val;
cfg = &d->staged_config[s->conf_type];
@@ -171,7 +167,7 @@ static int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s,
* Cannot set up more than one pseudo-locked region in a cache
* hierarchy.
*/
- if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP &&
+ if (mode == RDT_MODE_PSEUDO_LOCKSETUP &&
rdtgroup_pseudo_locked_in_hierarchy(d)) {
rdt_last_cmd_puts("Pseudo-locked region in hierarchy\n");
return -EINVAL;
@@ -180,9 +176,9 @@ static int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s,
if (!cbm_validate(data->buf, &cbm_val, r))
return -EINVAL;
- if ((rdtgrp->mode == RDT_MODE_EXCLUSIVE ||
- rdtgrp->mode == RDT_MODE_SHAREABLE) &&
- rdtgroup_cbm_overlaps_pseudo_locked(d, cbm_val)) {
+ if ((mode == RDT_MODE_EXCLUSIVE ||
+ mode == RDT_MODE_SHAREABLE) &&
+ rdtgroup_cbm_overlaps_pseudo_locked(d, cbm_val)) {
rdt_last_cmd_puts("CBM overlaps with pseudo-locked region\n");
return -EINVAL;
}
@@ -191,14 +187,14 @@ static int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s,
* The CBM may not overlap with the CBM of another closid if
* either is exclusive.
*/
- if (rdtgroup_cbm_overlaps(s, d, cbm_val, rdtgrp->closid, true)) {
+ if (rdtgroup_cbm_overlaps(s, d, cbm_val, closid, true)) {
rdt_last_cmd_puts("Overlaps with exclusive group\n");
return -EINVAL;
}
- if (rdtgroup_cbm_overlaps(s, d, cbm_val, rdtgrp->closid, false)) {
- if (rdtgrp->mode == RDT_MODE_EXCLUSIVE ||
- rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP) {
+ if (rdtgroup_cbm_overlaps(s, d, cbm_val, closid, false)) {
+ if (mode == RDT_MODE_EXCLUSIVE ||
+ mode == RDT_MODE_PSEUDO_LOCKSETUP) {
rdt_last_cmd_puts("Overlaps with other group\n");
return -EINVAL;
}
@@ -262,7 +258,8 @@ static int parse_line(char *line, struct resctrl_schema *s,
list_for_each_entry(d, &r->ctrl_domains, hdr.list) {
if (d->hdr.id == dom_id) {
data.buf = dom;
- data.rdtgrp = rdtgrp;
+ data.closid = rdtgrp->closid;
+ data.mode = rdtgrp->mode;
if (parse_ctrlval(&data, s, d))
return -EINVAL;
if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP) {
diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h
index 3d4a3d7696d0..ab76a1e2e679 100644
--- a/fs/resctrl/internal.h
+++ b/fs/resctrl/internal.h
@@ -201,6 +201,12 @@ struct rdtgroup {
struct pseudo_lock_region *plr;
};
+struct rdt_parse_data {
+ u32 closid;
+ enum rdtgrp_mode mode;
+ char *buf;
+};
+
/* rdtgroup.flags */
#define RDT_DELETED 1
--
2.34.1
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