tree 0d62a75a3e29667792ee37e3c5aed14d1bc03303
parent ba6bf8c85cb0d263ca9a98ef6a76ab651a97c60b
author Steve Capper <steve.capper@linaro.org> 1399381347 +0100
committer Catalin Marinas <catalin.marinas@arm.com> 1399648258 +0100

arm64: mm: Create gigabyte kernel logical mappings where possible

We have the capability to map 1GB level 1 blocks when using a 4K
granule.

This patch adjusts the create_mapping logic s.t. when mapping physical
memory on boot, we attempt to use a 1GB block if both the VA and PA
start and end are 1GB aligned. This both reduces the levels of lookup
required to resolve a kernel logical address, as well as reduces TLB
pressure on cores that support 1GB TLB entries.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Tested-by: Jungseok Lee <jays.lee@samsung.com>
[catalin.marinas@arm.com: s/prot_sect_kernel/PROT_SECT_NORMAL_EXEC/]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>