Commit 38f3e775 authored by Babu Moger's avatar Babu Moger Committed by Borislav Petkov
Browse files

x86/Kconfig: Update config and kernel doc for MPK feature on AMD 



AMD's next generation of EPYC processors support the MPK (Memory
Protection Keys) feature. Update the dependency and documentation.

Signed-off-by: default avatarBabu Moger <babu.moger@amd.com>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Reviewed-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/159068199556.26992.17733929401377275140.stgit@naples-babu.amd.com
parent d6ee6529

Documentation/core-api/protection-keys.rst

+3 −2
Original line number Diff line number Diff line
@@ -5,8 +5,9 @@ Memory Protection Keys 
======================



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.

which is found on Intel's Skylake (and later) "Scalable Processor"

Server CPUs. It will be available in future non-server Intel parts

and future AMD processors.



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

arch/x86/Kconfig

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@@ -1887,10 +1887,10 @@ config X86_UMIP 
	  results are dummy.



config X86_INTEL_MEMORY_PROTECTION_KEYS

	prompt "Intel Memory Protection Keys"

	prompt "Memory Protection Keys"

	def_bool y

	# Note: only available in 64-bit mode

	depends on CPU_SUP_INTEL && X86_64

	depends on X86_64 && (CPU_SUP_INTEL || CPU_SUP_AMD)

	select ARCH_USES_HIGH_VMA_FLAGS

	select ARCH_HAS_PKEYS

	---help---

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