Commit c03cb314 authored Oct 11, 2009 by Arjan van de Ven Committed by Ingo Molnar Oct 12, 2009

x86: Relegate CONFIG_PAT and CONFIG_MTRR configurability to EMBEDDED



MTRR and PAT support (which got added to CPUs over 10 years ago)
are no longer really optional in that more and more things are
depending on PAT just working, including various drivers and newer
versions of X.  (to not even speak of MTRR)

Having this as a regular config option just no longer makes sense.

This patch relegates CONFIG_X86_PAT to the EMBEDDED category so
ultra-embedded can still disable it if they really need to.

Also-Suggested-by: Roland Dreier <rdreier@cisco.com>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
LKML-Reference: <20091011103302.62bded41@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent d93a8f82

arch/x86/Kconfig

+5 −2

Original line number	Diff line number	Diff line
		@@ -1321,7 +1321,9 @@ config MATH_EMULATION
		kernel, it won't hurt.

		config MTRR
		bool "MTRR (Memory Type Range Register) support"
		bool
		default y
		prompt "MTRR (Memory Type Range Register) support" if EMBEDDED
		---help---
		On Intel P6 family processors (Pentium Pro, Pentium II and later)
		the Memory Type Range Registers (MTRRs) may be used to control
		@@ -1387,7 +1389,8 @@ config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT

		config X86_PAT
		bool
		prompt "x86 PAT support"
		default y
		prompt "x86 PAT support" if EMBEDDED
		depends on MTRR
		---help---
		Use PAT attributes to setup page level cache control.