linux-kernel - [PATCH 1/2][v2] resctrl: Add CPU

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Date:   Fri, 15 Nov 2019 13:24:20 +0800
From:   Chen Yu <yu.c.chen@...el.com>
To:     x86@...nel.org
Cc:     Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Michal Hocko <mhocko@...e.com>,
        Kees Cook <keescook@...omium.org>,
        Christian Brauner <christian@...uner.io>,
        Shakeel Butt <shakeelb@...gle.com>,
        Casey Schaufler <casey@...aufler-ca.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Kent Overstreet <kent.overstreet@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Chen Yu <yu.c.chen@...el.com>
Subject: [PATCH 1/2][v2] resctrl: Add CPU_RESCTRL

Introduce a generic option called CPU_RESCTRL which
is selected by the arch-specific ones CONFIG_X86_RESCTRL
or CONFIG_ARM64_RESCTRL in the future. The generic one will
cover the resctrl filesystem and other generic and shared
bits of functionality.

Suggested-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Chen Yu <yu.c.chen@...el.com>
---
 arch/Kconfig     | 4 ++++
 arch/x86/Kconfig | 1 +
 2 files changed, 5 insertions(+)

diff --git a/arch/Kconfig b/arch/Kconfig
index 5f8a5d84dbbe..3886cf0052a8 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -960,6 +960,10 @@ config RELR
 config ARCH_HAS_MEM_ENCRYPT
 	bool
 
+config CPU_RESCTRL
+	bool
+	def_bool n
+
 source "kernel/gcov/Kconfig"
 
 source "scripts/gcc-plugins/Kconfig"
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8ef85139553f..a8a12493e8c2 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -455,6 +455,7 @@ config X86_CPU_RESCTRL
 	bool "x86 CPU resource control support"
 	depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD)
 	select KERNFS
+	select CPU_RESCTRL
 	help
 	  Enable x86 CPU resource control support.
 
-- 
2.17.1