x86/resctrl: Avoid confusion over the new X86_RESCTRL config

"Resource Control" is a very broad term for this CPU feature, and a term
that is also associated with containers, cgroups etc. This can easily
cause confusion.

Make the user prompt more specific. Match the config symbol name.

 [ bp: In the future, the corresponding ARM arch-specific code will be
   under ARM_CPU_RESCTRL and the arch-agnostic bits will be carved out
   under the CPU_RESCTRL umbrella symbol. ]

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Babu Moger <Babu.Moger@amd.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morse <james.morse@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: linux-doc@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190130195621.GA30653@cmpxchg.org

diff --git a/Documentation/x86/resctrl_ui.txt b/Documentation/x86/resctrl_ui.txt
index e8e8d14d3c4e8d114f65e5258fdb8a15ba015f49..c1f95b59e14d9b73ab9ab9f8702fa2b85a170694 100644 (file)
--- a/Documentation/x86/resctrl_ui.txt
+++ b/Documentation/x86/resctrl_ui.txt
@@ -9,7 +9,7 @@ Fenghua Yu <fenghua.yu@intel.com>
 Tony Luck <tony.luck@intel.com>
 Vikas Shivappa <vikas.shivappa@intel.com>
 
-This feature is enabled by the CONFIG_X86_RESCTRL and the x86 /proc/cpuinfo
+This feature is enabled by the CONFIG_X86_CPU_RESCTRL and the x86 /proc/cpuinfo
 flag bits:
 RDT (Resource Director Technology) Allocation - "rdt_a"
 CAT (Cache Allocation Technology) - "cat_l3", "cat_l2"

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 26387c7bf305bc7d4e14e2d34856802a250c55ba..68261430fe6e9ca949a8e3e067b6bc0e496c4734 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -446,12 +446,12 @@ config RETPOLINE
          branches. Requires a compiler with -mindirect-branch=thunk-extern
          support for full protection. The kernel may run slower.
 
-config X86_RESCTRL
-       bool "Resource Control support"
+config X86_CPU_RESCTRL
+       bool "x86 CPU resource control support"
        depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD)
        select KERNFS
        help
-         Enable Resource Control support.
+         Enable x86 CPU resource control support.
 
          Provide support for the allocation and monitoring of system resources
          usage by the CPU.

diff --git a/arch/x86/include/asm/resctrl_sched.h b/arch/x86/include/asm/resctrl_sched.h
index 40ebddde6ac21205f4622b16edc790c6b323a1b0..f6b7fe2833cc72a78bed2c0cad3b59b8c6eb4f23 100644 (file)
--- a/arch/x86/include/asm/resctrl_sched.h
+++ b/arch/x86/include/asm/resctrl_sched.h
@@ -2,7 +2,7 @@
 #ifndef _ASM_X86_RESCTRL_SCHED_H
 #define _ASM_X86_RESCTRL_SCHED_H
 
-#ifdef CONFIG_X86_RESCTRL
+#ifdef CONFIG_X86_CPU_RESCTRL
 
 #include <linux/sched.h>
 #include <linux/jump_label.h>
@@ -88,6 +88,6 @@ static inline void resctrl_sched_in(void)
 
 static inline void resctrl_sched_in(void) {}
 
-#endif /* CONFIG_X86_RESCTRL */
+#endif /* CONFIG_X86_CPU_RESCTRL */
 
 #endif /* _ASM_X86_RESCTRL_SCHED_H */

diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index b6fa0869f7aa141bd9cb1af9d328b1340b40c7e5..cfd24f9f761442392c9d42540835c31001bda71f 100644 (file)
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -39,7 +39,7 @@ obj-$(CONFIG_CPU_SUP_UMC_32)          += umc.o
 obj-$(CONFIG_X86_MCE)                  += mce/
 obj-$(CONFIG_MTRR)                     += mtrr/
 obj-$(CONFIG_MICROCODE)                        += microcode/
-obj-$(CONFIG_X86_RESCTRL)              += resctrl/
+obj-$(CONFIG_X86_CPU_RESCTRL)          += resctrl/
 
 obj-$(CONFIG_X86_LOCAL_APIC)           += perfctr-watchdog.o
 

diff --git a/arch/x86/kernel/cpu/resctrl/Makefile b/arch/x86/kernel/cpu/resctrl/Makefile
index 1cabe6fd8e115e508b162c9dac910c76c75648c6..4a06c37b9cf11bef1b00b546e3c2344691e6e18a 100644 (file)
--- a/arch/x86/kernel/cpu/resctrl/Makefile
+++ b/arch/x86/kernel/cpu/resctrl/Makefile
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_X86_RESCTRL)      += core.o rdtgroup.o monitor.o
-obj-$(CONFIG_X86_RESCTRL)      += ctrlmondata.o pseudo_lock.o
+obj-$(CONFIG_X86_CPU_RESCTRL)  += core.o rdtgroup.o monitor.o
+obj-$(CONFIG_X86_CPU_RESCTRL)  += ctrlmondata.o pseudo_lock.o
 CFLAGS_pseudo_lock.o = -I$(src)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 224666226e87b0032a72fef1c1d59c585ad57bc7..8c328b14c42468713a7b0867dd1f1c041cdd654b 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -995,7 +995,7 @@ struct task_struct {
        /* cg_list protected by css_set_lock and tsk->alloc_lock: */
        struct list_head                cg_list;
 #endif
-#ifdef CONFIG_X86_RESCTRL
+#ifdef CONFIG_X86_CPU_RESCTRL
        u32                             closid;
        u32                             rmid;
 #endif