From: James Morse james.morse@arm.com
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@arm.com --- MAINTAINERS | 1 + arch/Kconfig | 8 ++++++++ arch/x86/Kconfig | 10 +++------- fs/Kconfig | 1 + fs/Makefile | 1 + fs/resctrl/Kconfig | 23 +++++++++++++++++++++++ fs/resctrl/Makefile | 1 + 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, 42 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 a707271ab5f0..58207397888a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18062,6 +18062,7 @@ 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 12d51495caec..1ee89d0ada03 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1324,6 +1324,14 @@ 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 d9434d0d99b4..d8322ee6e746 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -478,8 +478,10 @@ 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. @@ -497,12 +499,6 @@ config X86_CPU_RESCTRL
Say N if unsure.
-config RESCTRL_FS_PSEUDO_LOCK - bool - help - Software mechanism to try and pin data in a cache portion using - micro-architecture tricks. - 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 aa7e03cc1941..1e3ed753b9fe 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -325,6 +325,7 @@ 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 bb6164200a39..df06712e1204 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -130,3 +130,4 @@ obj-$(CONFIG_EFIVAR_FS) += efivarfs/ obj-$(CONFIG_EROFS_FS) += erofs/ obj-$(CONFIG_VBOXSF_FS) += vboxsf/ obj-$(CONFIG_ZONEFS_FS) += zonefs/ +obj-$(CONFIG_RESCTRL_FS) += resctrl/ diff --git a/fs/resctrl/Kconfig b/fs/resctrl/Kconfig new file mode 100644 index 000000000000..5bbf5a1798cd --- /dev/null +++ b/fs/resctrl/Kconfig @@ -0,0 +1,23 @@ +config RESCTRL_FS + bool "CPU Resource Control Filesystem (resctrl)" + depends on ARCH_HAS_CPU_RESCTRL + select KERNFS + select PROC_CPU_RESCTRL if PROC_FS + help + Resctrl is a filesystem interface + to control allocation and + monitoring of system resources + used by the CPUs. + +config RESCTRL_FS_PSEUDO_LOCK + bool + help + Software mechanism to try and pin data in a cache portion using + micro-architecture tricks. + +config RESCTRL_RMID_DEPENDS_ON_CLOSID + bool + help + Enable by the architecture when the RMID values depend on the CLOSID. + This causes the closid allocator to search for CLOSID with clean + RMID. diff --git a/fs/resctrl/Makefile b/fs/resctrl/Makefile new file mode 100644 index 000000000000..4c32e5e914b6 --- /dev/null +++ b/fs/resctrl/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_RESCTRL_FS) += rdtgroup.o ctrlmondata.o monitor.o 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 f9de90bc1f55..9066017d4f33 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