From: jeremy.linton@arm.com (Jeremy Linton)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 6/7] arm64: Add a kernel Kconfig option to enable contiguous PTE marking
Date: Wed, 7 Oct 2015 12:00:24 -0500 [thread overview]
Message-ID: <1444237225-13802-7-git-send-email-jeremy.linton@arm.com> (raw)
In-Reply-To: <1444237225-13802-1-git-send-email-jeremy.linton@arm.com>
Add ARM64_CONT_PTE, so that the contiguous PTE marking
in the kernel's linear mapping may be turned off.
In general this should not be necessary, but it can
help sanity check that the code/hardware is working properly.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
arch/arm64/Kconfig | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 07d1811..9485c14 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -400,6 +400,13 @@ config ARM64_VA_BITS
default 42 if ARM64_VA_BITS_42
default 48 if ARM64_VA_BITS_48
+config ARM64_CONT_PTE
+ bool "Use contiguous page hint for kernel linear mapping"
+ default y
+ help
+ Marking kernel pages contiguous can reduce TLB pressure for
+ certain workloads. If unsure, say Y.
+
config CPU_BIG_ENDIAN
bool "Build big-endian kernel"
help
--
2.4.3
next prev parent reply other threads:[~2015-10-07 17:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-07 17:00 [PATCHv3 0/7] arm64: Use contiguous PTE bit for the kernel linear mapping Jeremy Linton
2015-10-07 17:00 ` [PATCH 1/7] arm64: Add contiguous page flag shifts and constants Jeremy Linton
2015-10-07 17:00 ` [PATCH 2/7] arm64: PTE/PMD contiguous bit definition Jeremy Linton
2015-10-07 17:00 ` [PATCH 3/7] arm64: Macros to check/set/unset the contiguous bit Jeremy Linton
2015-10-07 17:00 ` [PATCH 4/7] arm64: Default kernel pages should be contiguous Jeremy Linton
2015-10-07 17:00 ` [PATCH 5/7] arm64: Make the kernel page dump utility aware of the CONT bit Jeremy Linton
2015-10-07 17:00 ` Jeremy Linton [this message]
2015-10-07 17:00 ` [PATCH 7/7] arm64: Mark kernel page ranges contiguous Jeremy Linton
2015-10-09 12:50 ` [PATCHv3 0/7] arm64: Use contiguous PTE bit for the kernel linear mapping Catalin Marinas
2015-10-09 15:00 ` Jeremy Linton
2015-11-17 15:37 ` Jeremy Linton
2015-11-18 11:01 ` Will Deacon
2015-11-18 14:10 ` Jeremy Linton
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