diff options
| author | Dave Hansen <[email protected]> | 2017-11-10 16:12:28 -0800 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-11-21 09:34:52 +0100 |
| commit | c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59 (patch) | |
| tree | 3827a27b7cb80ea898f49f49aba57bc067de801f | |
| parent | fd11a6496e12848d4eeb21029c2c288bbc638048 (diff) | |
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]>
| -rw-r--r-- | Documentation/x86/protection-keys.txt | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/x86/protection-keys.txt b/Documentation/x86/protection-keys.txt index fa46dcb347bc..ecb0d2dadfb7 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 |