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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2017-11-11 01:12:28 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-11-21 09:34:52 +0100 |
| commit | c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59 (patch) | |
| tree | 3827a27b7cb80ea898f49f49aba57bc067de801f | |
| parent | x86/umip: Print a warning into the syslog if UMIP-protected instructions are ... (diff) | |
| download | linux-c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59.tar.xz linux-c51ff2c7fc45da8b18b28c4f15eca5a9975dfb59.zip | |
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@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171111001228.DC748A10@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -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 |