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arm64/mm: Add PROT_DEVICE_nGnRnE and PROT_NORMAL_WT

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UEFI spec 2.5 section 2.3.6.1 defines that
EFI_MEMORY_[UC|WC|WT|WB] are possible EFI memory types for
AArch64.

Each of those EFI memory types is mapped to a corresponding
AArch64 memory type. So we need to define PROT_DEVICE_nGnRnE
and PROT_NORMWL_WT additionaly.

MT_NORMAL_WT is defined, and its encoding is added to MAIR_EL1
when initializing the CPU.

Signed-off-by: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1438936621-5215-6-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Jonathan (Zhixiong) Zhang
2015-08-07 09:36:59 +01:00
committed by Ingo Molnar
parent b40227fbfb
commit 8d446c8647
3 changed files with 6 additions and 1 deletions
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1
arch/arm64/include/asm/memory.h
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@@ -100,6 +100,7 @@
#define MT_DEVICE_GRE 2
#define MT_NORMAL_NC 3
#define MT_NORMAL 4
#define MT_NORMAL_WT 5
/*
* Memory types for Stage-2 translation