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Message-Id: <20240321165106.31602-30-james.morse@arm.com> Date: Thu, 21 Mar 2024 16:51:04 +0000 From: James Morse <james.morse@....com> To: x86@...nel.org, linux-kernel@...r.kernel.org Cc: Fenghua Yu <fenghua.yu@...el.com>, Reinette Chatre <reinette.chatre@...el.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, H Peter Anvin <hpa@...or.com>, Babu Moger <Babu.Moger@....com>, James Morse <james.morse@....com>, shameerali.kolothum.thodi@...wei.com, D Scott Phillips OS <scott@...amperecomputing.com>, carl@...amperecomputing.com, lcherian@...vell.com, bobo.shaobowang@...wei.com, tan.shaopeng@...itsu.com, baolin.wang@...ux.alibaba.com, Jamie Iles <quic_jiles@...cinc.com>, Xin Hao <xhao@...ux.alibaba.com>, peternewman@...gle.com, dfustini@...libre.com, amitsinght@...vell.com, David Hildenbrand <david@...hat.com>, Rex Nie <rex.nie@...uarmicro.com>, Dave Martin <dave.martin@....com> Subject: [PATCH v1 29/31] fs/resctrl: Add boiler plate for external resctrl code Add Makefile and Kconfig for fs/resctrl. Add ARCH_HAS_CPU_RESCTRL for the common parts of the resctrl interface and make X86_CPU_RESCTRL depend on this. Signed-off-by: James Morse <james.morse@....com> --- MAINTAINERS | 1 + arch/Kconfig | 8 ++++++++ arch/x86/Kconfig | 10 +++------- fs/Kconfig | 1 + fs/Makefile | 1 + fs/resctrl/Kconfig | 23 +++++++++++++++++++++++ fs/resctrl/Makefile | 3 +++ fs/resctrl/ctrlmondata.c | 0 fs/resctrl/internal.h | 0 fs/resctrl/monitor.c | 0 fs/resctrl/psuedo_lock.c | 0 fs/resctrl/rdtgroup.c | 0 include/linux/resctrl.h | 4 ++++ 13 files changed, 44 insertions(+), 7 deletions(-) create mode 100644 fs/resctrl/Kconfig create mode 100644 fs/resctrl/Makefile create mode 100644 fs/resctrl/ctrlmondata.c create mode 100644 fs/resctrl/internal.h create mode 100644 fs/resctrl/monitor.c create mode 100644 fs/resctrl/psuedo_lock.c create mode 100644 fs/resctrl/rdtgroup.c diff --git a/MAINTAINERS b/MAINTAINERS index 5621dd823e79..c49090e9c777 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18543,6 +18543,7 @@ S: Supported F: Documentation/arch/x86/resctrl* F: arch/x86/include/asm/resctrl.h F: arch/x86/kernel/cpu/resctrl/ +F: fs/resctrl/ F: include/linux/resctrl*.h F: tools/testing/selftests/resctrl/ diff --git a/arch/Kconfig b/arch/Kconfig index fd18b7db2c77..131d874d6738 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1406,6 +1406,14 @@ config STRICT_MODULE_RWX config ARCH_HAS_PHYS_TO_DMA bool +config ARCH_HAS_CPU_RESCTRL + bool + help + The 'resctrl' filesystem allows CPU controls of shared resources + such as caches and memory bandwidth to be configured. An architecture + selects this if it provides the arch-specific hooks for the filesystem + and needs the per-task CLOSID/RMID properties. + config HAVE_ARCH_COMPILER_H bool help diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e071e564452e..cb043543f088 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -479,8 +479,10 @@ config GOLDFISH config X86_CPU_RESCTRL bool "x86 CPU resource control support" depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD) + depends on MISC_FILESYSTEMS select KERNFS - select PROC_CPU_RESCTRL if PROC_FS + select ARCH_HAS_CPU_RESCTRL + select RESCTRL_FS select RESCTRL_FS_PSEUDO_LOCK help Enable x86 CPU resource control support. @@ -507,12 +509,6 @@ config X86_FRED ring transitions and exception/interrupt handling if the system supports. -config RESCTRL_FS_PSEUDO_LOCK - bool - help - Software mechanism to pin data in a cache portion using - micro-architecture specific knowledge. - if X86_32 config X86_BIGSMP bool "Support for big SMP systems with more than 8 CPUs" diff --git a/fs/Kconfig b/fs/Kconfig index a46b0cbc4d8f..d8a36383b6dc 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -331,6 +331,7 @@ source "fs/omfs/Kconfig" source "fs/hpfs/Kconfig" source "fs/qnx4/Kconfig" source "fs/qnx6/Kconfig" +source "fs/resctrl/Kconfig" source "fs/romfs/Kconfig" source "fs/pstore/Kconfig" source "fs/sysv/Kconfig" diff --git a/fs/Makefile b/fs/Makefile index 6ecc9b0a53f2..da6e2d028722 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -129,3 +129,4 @@ obj-$(CONFIG_EFIVAR_FS) += efivarfs/ obj-$(CONFIG_EROFS_FS) += erofs/ obj-$(CONFIG_VBOXSF_FS) += vboxsf/ obj-$(CONFIG_ZONEFS_FS) += zonefs/ +obj-$(CONFIG_RESCTRL_FS) += resctrl/ diff --git a/fs/resctrl/Kconfig b/fs/resctrl/Kconfig new file mode 100644 index 000000000000..36a1ddbe6c21 --- /dev/null +++ b/fs/resctrl/Kconfig @@ -0,0 +1,23 @@ +config RESCTRL_FS + bool "CPU Resource Control Filesystem (resctrl)" + depends on ARCH_HAS_CPU_RESCTRL + select KERNFS + select PROC_CPU_RESCTRL if PROC_FS + help + Resctrl is a filesystem interface + to control allocation and + monitoring of system resources + used by the CPUs. + +config RESCTRL_FS_PSEUDO_LOCK + bool + help + Software mechanism to pin data in a cache portion using + micro-architecture specific knowledge. + +config RESCTRL_RMID_DEPENDS_ON_CLOSID + bool + help + Enable by the architecture when the RMID values depend on the CLOSID. + This causes the closid allocator to search for CLOSID with clean + RMID. diff --git a/fs/resctrl/Makefile b/fs/resctrl/Makefile new file mode 100644 index 000000000000..10fcfb0fdb10 --- /dev/null +++ b/fs/resctrl/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_RESCTRL_FS) += rdtgroup.o ctrlmondata.o monitor.o +obj-$(CONFIG_RESCTRL_FS_PSEUDO_LOCK) += psuedo_lock.o diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/fs/resctrl/psuedo_lock.c b/fs/resctrl/psuedo_lock.c new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 5da55e58f229..f786ffceeda3 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -8,6 +8,10 @@ #include <linux/pid.h> #include <linux/resctrl_types.h> +#ifdef CONFIG_ARCH_HAS_CPU_RESCTRL +#include <asm/resctrl.h> +#endif + /* CLOSID, RMID value used by the default control group */ #define RESCTRL_RESERVED_CLOSID 0 #define RESCTRL_RESERVED_RMID 0 -- 2.39.2
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