1d2a03d2 - tools/x86/kcpuid: Add missing dir via Makefile

Fri, 31 May 2024 11:17:58 +0000

tools/x86/kcpuid: Add missing dir via MakefileSo far the Makefile just installed the csv into $(HWDATADIR)/cpuid.csv, whichmade it unaware about $DESTDIR. Add $DESTDIR to the install command and whileat it also create the directory, should it not exist already. This eases thepackaging of kcpuid and allows i.e. for the install on Arch to look like this: $ make BINDIR=/usr/bin DESTDIR="$pkgdir" -C tools/arch/x86/kcpuid installSome background on DESTDIR:DESTDIR is commonly used in packaging for staged installs (regardless of theused package manager): https://www.gnu.org/prep/standards/html_node/DESTDIR.htmlSo the package is built and installed into a directory which the packagemanager later picks up and creates some archive from it.What is specific to Arch Linux here is only the usage of $pkgdir in theexample, DESTDIR itself is widely used. [ bp: Extend the commit message with Christian's info on DESTDIR as a GNU coding standards thing. ]Signed-off-by: Christian Heusel Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20240531111757.719528-2-christian@heusel.eu List of files: /linux-6.15/tools/arch/x86/kcpuid/Makefile

c6b2f240 - tools/x86: Add a kcpuid tool to show raw CPU features

Fri, 05 Mar 2021 07:21:18 +0000

tools/x86: Add a kcpuid tool to show raw CPU featuresEnd users frequently want to know what features their processorsupports, independent of what the kernel supports./proc/cpuinfo is great. It is omnipresent and since it is provided bythe kernel it is always as up to date as the kernel. But, it could beambiguous about processor features which can be disabled by the kernelat boot-time or compile-time.There are some user space tools showing more raw features, but they arenot bound with kernel, and go with distros. Many end users are stillusing old distros with new kernels (upgraded by themselves), and maynot upgrade the distros only to get a newer tool.So here arise the need for a new tool, which * shows raw CPU features read from the CPUID instruction * will be easier to update compared to existing userspace tooling (perhaps distributed like perf) * inherits "modern" kernel development process, in contrast to some of the existing userspace CPUID tools which are still being developed without git and distributed in tarballs from non-https sites. * Can produce output consistent with /proc/cpuinfo to make comparison easier.The CPUID leaf definitions are kept in an .csv file which allows forupdating only that file to add support for new feature leafs.This is based on prototype code from Borislav Petkov(http://sr71.net/~dave/intel/stupid-cpuid.c). [ bp: - Massage, add #define _GNU_SOURCE to fix implicit declaration of function ‘strcasestr' warning - remove superfluous newlines - fallback to cpuid.csv in the current dir if none found - fix typos - move comments over the lines instead of sideways. ]Originally-from: Borislav Petkov Suggested-by: Dave Hansen Suggested-by: Borislav Petkov Signed-off-by: Feng Tang Signed-off-by: Borislav Petkov Link: https://lkml.kernel.org/r/1614928878-86075-1-git-send-email-feng.tang@intel.com List of files: /linux-6.15/tools/arch/x86/kcpuid/Makefile

Changes in Makefile

1d2a03d2 - tools/x86/kcpuid: Add missing dir via Makefile

c6b2f240 - tools/x86: Add a kcpuid tool to show raw CPU features