diff options
| author | Babu Moger <babu.moger@amd.com> | 2023-10-17 03:23:07 +0300 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-10-17 15:05:24 +0300 |
| commit | 918f211b5e4e709e91acf856967a850569c96b71 (patch) | |
| tree | 01f1d2378c8e5b86fe4153bbcc7b782cb45faaf3 | |
| parent | ca8dad225e237493f19b1c5d4a8531f13a9b078f (diff) | |
| download | linux-918f211b5e4e709e91acf856967a850569c96b71.tar.xz | |
x86/resctrl: Add support for the files of MON groups only
Files unique to monitoring groups have the RFTYPE_MON flag. When a new
monitoring group is created the resctrl files with flags RFTYPE_BASE
(files common to all resource groups) and RFTYPE_MON (files unique to
monitoring groups) are created to support interacting with the new
monitoring group.
A resource group can support both monitoring and control, also termed
a CTRL_MON resource group. CTRL_MON groups should get both monitoring
and control resctrl files but that is not the case. Only the
RFTYPE_BASE and RFTYPE_CTRL files are created for CTRL_MON groups.
Ensure that files with the RFTYPE_MON flag are created for CTRL_MON groups.
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Peter Newman <peternewman@google.com>
Reviewed-by: Tan Shaopeng <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Tan Shaopeng <tan.shaopeng@jp.fujitsu.com>
Link: https://lore.kernel.org/r/20231017002308.134480-9-babu.moger@amd.com
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/rdtgroup.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index 5814a0bf3cea..5f6d6ba63a2e 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -2551,6 +2551,7 @@ static void schemata_list_destroy(void) static int rdt_get_tree(struct fs_context *fc) { struct rdt_fs_context *ctx = rdt_fc2context(fc); + unsigned long flags = RFTYPE_CTRL_BASE; struct rdt_domain *dom; struct rdt_resource *r; int ret; @@ -2581,7 +2582,10 @@ static int rdt_get_tree(struct fs_context *fc) closid_init(); - ret = rdtgroup_add_files(rdtgroup_default.kn, RFTYPE_CTRL_BASE); + if (rdt_mon_capable) + flags |= RFTYPE_MON; + + ret = rdtgroup_add_files(rdtgroup_default.kn, flags); if (ret) goto out_schemata_free; @@ -3271,8 +3275,8 @@ static int mkdir_rdt_prepare(struct kernfs_node *parent_kn, enum rdt_group_type rtype, struct rdtgroup **r) { struct rdtgroup *prdtgrp, *rdtgrp; + unsigned long files = 0; struct kernfs_node *kn; - uint files = 0; int ret; prdtgrp = rdtgroup_kn_lock_live(parent_kn); @@ -3324,10 +3328,13 @@ static int mkdir_rdt_prepare(struct kernfs_node *parent_kn, goto out_destroy; } - if (rtype == RDTCTRL_GROUP) + if (rtype == RDTCTRL_GROUP) { files = RFTYPE_BASE | RFTYPE_CTRL; - else + if (rdt_mon_capable) + files |= RFTYPE_MON; + } else { files = RFTYPE_BASE | RFTYPE_MON; + } ret = rdtgroup_add_files(kn, files); if (ret) { |