Commit-ID: c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59 Gitweb: https://git.kernel.org/tip/c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59 Author: Dave Hansen <[email protected]> AuthorDate: Fri, 10 Nov 2017 16:12:28 -0800 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 21 Nov 2017 09:34:52 +0100
x86/pkeys: Update documentation about availability Now that CPUs that implement Memory Protection Keys are publicly available we can be a bit less oblique about where it is available. Signed-off-by: Dave Hansen <[email protected]> Acked-by: Thomas Gleixner <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- Documentation/x86/protection-keys.txt | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/Documentation/x86/protection-keys.txt b/Documentation/x86/protection-keys.txt index fa46dcb..ecb0d2d 100644 --- a/Documentation/x86/protection-keys.txt +++ b/Documentation/x86/protection-keys.txt @@ -1,5 +1,10 @@ -Memory Protection Keys for Userspace (PKU aka PKEYs) is a CPU feature -which will be found on future Intel CPUs. +Memory Protection Keys for Userspace (PKU aka PKEYs) is a feature +which is found on Intel's Skylake "Scalable Processor" Server CPUs. +It will be avalable in future non-server parts. + +For anyone wishing to test or use this feature, it is available in +Amazon's EC2 C5 instances and is known to work there using an Ubuntu +17.04 image. Memory Protection Keys provides a mechanism for enforcing page-based protections, but without requiring modification of the page tables
