diff options
| author | James Morse <james.morse@arm.com> | 2025-05-15 16:58:45 +0000 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-05-16 11:05:40 +0200 |
| commit | bff70402d6d67843fe319338e4c56e1cba13fbd8 (patch) | |
| tree | 178c39875fa34e95001d9d5f5296628e37db2535 /fs/resctrl | |
| parent | x86/resctrl: Add 'resctrl' to the title of the resctrl documentation (diff) | |
| download | linux-bff70402d6d67843fe319338e4c56e1cba13fbd8.tar.gz linux-bff70402d6d67843fe319338e4c56e1cba13fbd8.zip | |
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
select this.
Adding an include of asm/resctrl.h to linux/resctrl.h allows the
/fs/resctrl files to switch over to using this header instead.
Co-developed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com> # arm64
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Amit Singh Tomar <amitsinght@marvell.com> # arm64
Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> # arm64
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/20250515165855.31452-16-james.morse@arm.com
Diffstat (limited to 'fs/resctrl')
| -rw-r--r-- | fs/resctrl/Kconfig | 39 | ||||
| -rw-r--r-- | fs/resctrl/Makefile | 6 | ||||
| -rw-r--r-- | fs/resctrl/ctrlmondata.c | 0 | ||||
| -rw-r--r-- | fs/resctrl/internal.h | 0 | ||||
| -rw-r--r-- | fs/resctrl/monitor.c | 0 | ||||
| -rw-r--r-- | fs/resctrl/monitor_trace.h | 0 | ||||
| -rw-r--r-- | fs/resctrl/pseudo_lock.c | 0 | ||||
| -rw-r--r-- | fs/resctrl/pseudo_lock_trace.h | 0 | ||||
| -rw-r--r-- | fs/resctrl/rdtgroup.c | 0 |
9 files changed, 45 insertions, 0 deletions
diff --git a/fs/resctrl/Kconfig b/fs/resctrl/Kconfig new file mode 100644 index 000000000000..478a8e2ad99f --- /dev/null +++ b/fs/resctrl/Kconfig @@ -0,0 +1,39 @@ +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 + Some architectures provide hardware facilities to group tasks and + monitor and control their usage of memory system resources such as + caches and memory bandwidth. Examples of such facilities include + Intel's Resource Director Technology (Intel(R) RDT) and AMD's + Platform Quality of Service (AMD QoS). + + If your system has the necessary support and you want to be able to + assign tasks to groups and manipulate the associated resource + monitors and controls from userspace, say Y here to get a mountable + 'resctrl' filesystem that lets you do just that. + + If nothing mounts or prods the 'resctrl' filesystem, resource + controls and monitors are left in a quiescent, permissive state. + + On architectures where this can be disabled independently, it is + safe to say N. + + See <file:Documentation/arch/x86/resctrl.rst> for more information. + +config RESCTRL_FS_PSEUDO_LOCK + bool + depends on RESCTRL_FS + help + Software mechanism to pin data in a cache portion using + micro-architecture specific knowledge. + +config RESCTRL_RMID_DEPENDS_ON_CLOSID + bool + depends on RESCTRL_FS + help + Enabled 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..e67f34d2236a --- /dev/null +++ b/fs/resctrl/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_RESCTRL_FS) += rdtgroup.o ctrlmondata.o monitor.o +obj-$(CONFIG_RESCTRL_FS_PSEUDO_LOCK) += pseudo_lock.o + +# To allow define_trace.h's recursive include: +CFLAGS_monitor.o = -I$(src) diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/fs/resctrl/ctrlmondata.c diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/fs/resctrl/internal.h diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/fs/resctrl/monitor.c diff --git a/fs/resctrl/monitor_trace.h b/fs/resctrl/monitor_trace.h new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/fs/resctrl/monitor_trace.h diff --git a/fs/resctrl/pseudo_lock.c b/fs/resctrl/pseudo_lock.c new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/fs/resctrl/pseudo_lock.c diff --git a/fs/resctrl/pseudo_lock_trace.h b/fs/resctrl/pseudo_lock_trace.h new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/fs/resctrl/pseudo_lock_trace.h diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c new file mode 100644 index 000000000000..e69de29bb2d1 --- /dev/null +++ b/fs/resctrl/rdtgroup.c |