Changes in Makefile

70288405 - x86/resctrl: Allow an architecture to disable pseudo lock

Tue, 11 Mar 2025 18:37:09 +0000

x86/resctrl: Allow an architecture to disable pseudo lockPseudo-lock relies on knowledge of the micro-architecture to disableprefetchers etc.On arm64 these controls are typically secure only, meaning Linux can't accessthem. Arm's cache-lockdown feature works in a very different way. Resctrl'spseudo-lock isn't going to be used on arm64 platforms.Add a Kconfig symbol that can be selected by the architecture. This enables ordisables building of the pseudo_lock.c file, and replaces the functions withstubs. An additional IS_ENABLED() check is needed in rdtgroup_mode_write() sothat attempting to enable pseudo-lock reports an "Unknown or unsupported mode"to user-space via the last_cmd_status file.Signed-off-by: James Morse Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Shaopeng Tan Reviewed-by: Tony Luck Reviewed-by: Reinette Chatre Reviewed-by: Fenghua Yu Reviewed-by: Babu Moger Tested-by: Carl Worth # arm64Tested-by: Shaopeng Tan Tested-by: Peter Newman Tested-by: Amit Singh Tomar # arm64Tested-by: Shanker Donthineni # arm64Tested-by: Babu Moger Link: https://lore.kernel.org/r/20250311183715.16445-25-james.morse@arm.com List of files: /linux-6.15/arch/x86/kernel/cpu/resctrl/Makefile

e6d42931 - x86/resctrl: Avoid confusion over the new X86_RESCTRL config

Tue, 29 Jan 2019 22:44:36 +0000

x86/resctrl: Avoid confusion over the new X86_RESCTRL config"Resource Control" is a very broad term for this CPU feature, and a termthat is also associated with containers, cgroups etc. This can easilycause 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 Signed-off-by: Borislav Petkov Cc: Babu Moger Cc: Fenghua Yu Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: James Morse Cc: Jonathan Corbet Cc: "Kirill A. Shutemov" Cc: linux-doc@vger.kernel.orgCc: Peter Zijlstra Cc: Pu Wen Cc: Reinette Chatre Cc: Thomas Gleixner Cc: Tony Luck Cc: x86-ml Link: https://lkml.kernel.org/r/20190130195621.GA30653@cmpxchg.org List of files: /linux-6.15/arch/x86/kernel/cpu/resctrl/Makefile

90802938 - x86/cache: Rename config option to CONFIG_X86_RESCTRL

Tue, 08 Jan 2019 16:38:29 +0000

x86/cache: Rename config option to CONFIG_X86_RESCTRLCONFIG_RESCTRL is too generic. The final goal is to have a genericoption called like this which is selected by the arch-specific onesCONFIG_X86_RESCTRL and CONFIG_ARM64_RESCTRL. The generic one willcover the resctrl filesystem and other generic and shared bits offunctionality.Signed-off-by: Borislav Petkov Suggested-by: Ingo Molnar Requested-by: Linus Torvalds Cc: Babu Moger Cc: Fenghua Yu Cc: James Morse Cc: Reinette Chatre Cc: Tony Luck Cc: x86@kernel.orgLink: http://lkml.kernel.org/r/20190108171401.GC12235@zn.tnic List of files: /linux-6.15/arch/x86/kernel/cpu/resctrl/Makefile

6fe07ce3 - x86/resctrl: Rename the config option INTEL_RDT to RESCTRL

Wed, 21 Nov 2018 20:28:39 +0000

x86/resctrl: Rename the config option INTEL_RDT to RESCTRLThe resource control feature is supported by both Intel and AMD. So,rename CONFIG_INTEL_RDT to the vendor-neutral CONFIG_RESCTRL.Now CONFIG_RESCTRL will be used for both Intel and AMD to enableResource Control support. Update the texts in config and conditionaccordingly. [ bp: Simplify Kconfig text. ]Signed-off-by: Babu Moger Signed-off-by: Borislav Petkov Cc: Andrew Morton Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Brijesh Singh Cc: "Chang S. Bae" Cc: David Miller Cc: David Woodhouse Cc: Dmitry Safonov Cc: Fenghua Yu Cc: Greg Kroah-Hartman Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jann Horn Cc: Joerg Roedel Cc: Jonathan Corbet Cc: Josh Poimboeuf Cc: Kate Stewart Cc: "Kirill A. Shutemov" Cc: Cc: Mauro Carvalho Chehab Cc: Paolo Bonzini Cc: Peter Zijlstra Cc: Philippe Ombredanne Cc: Pu Wen Cc: Cc: "Rafael J. Wysocki" Cc: Reinette Chatre Cc: Rian Hunter Cc: Sherry Hurwitz Cc: Suravee Suthikulpanit Cc: Thomas Gleixner Cc: Thomas Lendacky Cc: Tony Luck Cc: Vitaly Kuznetsov Cc: Link: https://lkml.kernel.org/r/20181121202811.4492-9-babu.moger@amd.com List of files: /linux-6.15/arch/x86/kernel/cpu/resctrl/Makefile

fa7d9493 - x86/resctrl: Rename and move rdt files to a separate directory

Wed, 21 Nov 2018 20:28:25 +0000

x86/resctrl: Rename and move rdt files to a separate directoryNew generation of AMD processors add support for RDT (or QOS) features.Together, these features will be called RESCTRL. With more than onevendors supporting these features, it seems more appropriate to renamethese files.Create a new directory with the name 'resctrl' and move all theintel_rdt files to the new directory. This way all the resctrl relatedcode resides inside one directory. [ bp: Add SPDX identifier to the Makefile ]Suggested-by: Borislav Petkov Signed-off-by: Babu Moger Signed-off-by: Borislav Petkov Cc: Andrew Morton Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Brijesh Singh Cc: "Chang S. Bae" Cc: David Miller Cc: David Woodhouse Cc: Dmitry Safonov Cc: Fenghua Yu Cc: Greg Kroah-Hartman Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jann Horn Cc: Joerg Roedel Cc: Jonathan Corbet Cc: Josh Poimboeuf Cc: Kate Stewart Cc: "Kirill A. Shutemov" Cc: Cc: Mauro Carvalho Chehab Cc: Paolo Bonzini Cc: Peter Zijlstra Cc: Philippe Ombredanne Cc: Pu Wen Cc: Cc: "Rafael J. Wysocki" Cc: Reinette Chatre Cc: Rian Hunter Cc: Sherry Hurwitz Cc: Suravee Suthikulpanit Cc: Thomas Gleixner Cc: Thomas Lendacky Cc: Tony Luck Cc: Vitaly Kuznetsov Cc: Link: https://lkml.kernel.org/r/20181121202811.4492-2-babu.moger@amd.com List of files: /linux-6.15/arch/x86/kernel/cpu/resctrl/Makefile