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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Aug 2024 16:17:17.3668 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3d8c4d35-9a33-48f8-19e9-08dcbe0ee5e2 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000989EC.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB7488 Content-Type: text/plain; charset="utf-8" When enabled, SDCIAE forces all SDCI lines to be placed into the L3 cache partitions identified by the highest-supported L3_MASK_n register where n is the maximum CLOSID supported. Add the interface to display CBMs (Capacity Bit Mask) of the SDCIAE. Signed-off-by: Babu Moger --- arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 2 +- arch/x86/kernel/cpu/resctrl/internal.h | 1 + arch/x86/kernel/cpu/resctrl/rdtgroup.c | 29 +++++++++++++++++++++++ 3 files changed, 31 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cp= u/resctrl/ctrlmondata.c index 50fa1fe9a073..fc99f4d17e6c 100644 --- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c +++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c @@ -439,7 +439,7 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, str= uct rdt_ctrl_domain *d, return hw_dom->ctrl_val[idx]; } =20 -static void show_doms(struct seq_file *s, struct resctrl_schema *schema, i= nt closid) +void show_doms(struct seq_file *s, struct resctrl_schema *schema, int clos= id) { struct rdt_resource *r =3D schema->res; struct rdt_ctrl_domain *dom; diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 9a3da6d49144..f2c87ca37b13 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -663,6 +663,7 @@ void __init thread_throttle_mode_init(void); void __init mbm_config_rftype_init(const char *config); void rdt_staged_configs_clear(void); void __init resctrl_sdciae_rftype_init(void); +void show_doms(struct seq_file *s, struct resctrl_schema *schema, int clos= id); bool closid_allocated(unsigned int closid); int resctrl_find_cleanest_closid(void); =20 diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index 58e4df195207..51bc715bb6ae 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1922,6 +1922,25 @@ static ssize_t resctrl_sdciae_write(struct kernfs_op= en_file *of, char *buf, return ret ?: nbytes; } =20 +static int resctrl_sdciae_cbm_show(struct kernfs_open_file *of, + struct seq_file *seq, void *v) +{ + struct resctrl_schema *s =3D of->kn->parent->priv; + struct rdt_resource *r =3D s->res; + u32 sdciae_closid; + + if (!resctrl_arch_get_sdciae_enabled(RDT_RESOURCE_L3)) { + rdt_last_cmd_puts("SDCIAE is not enabled\n"); + return -EINVAL; + } + + sdciae_closid =3D get_sdciae_closid(r); + + show_doms(seq, s, sdciae_closid); + + return 0; +} + /* rdtgroup information files for one cache resource. */ static struct rftype res_common_files[] =3D { { @@ -2081,6 +2100,12 @@ static struct rftype res_common_files[] =3D { .seq_show =3D resctrl_sdciae_show, .write =3D resctrl_sdciae_write, }, + { + .name =3D "sdciae_cbm", + .mode =3D 0444, + .kf_ops =3D &rdtgroup_kf_single_ops, + .seq_show =3D resctrl_sdciae_cbm_show, + }, { .name =3D "mode", .mode =3D 0644, @@ -2187,6 +2212,10 @@ void __init resctrl_sdciae_rftype_init(void) rft =3D rdtgroup_get_rftype_by_name("sdciae"); if (rft) rft->fflags =3D RFTYPE_CTRL_INFO | RFTYPE_RES_CACHE; + + rft =3D rdtgroup_get_rftype_by_name("sdciae_cbm"); + if (rft) + rft->fflags =3D RFTYPE_CTRL_INFO | RFTYPE_RES_CACHE; } =20 /** --=20 2.34.1