Commit-ID: c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59 Gitweb: https://git.kernel.org/tip/c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59 Author: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> AuthorDate: Fri, 10 Nov 2017 16:12:28 -0800 Committer: Ingo Molnar <mingo@xxxxxxxxxx> 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 <dave.hansen@xxxxxxxxxxxxxxx> Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/20171111001228.DC748A10@xxxxxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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