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arm64: mm: Remove unused support for Device-GRE memory type

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The Device-GRE memory type is unused, so remove it and reclaim a MAIR.

Cc: Christoph Hellwig <hch@lst.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210505180228.GA3874@arm.com
Link: https://lore.kernel.org/r/20210527110319.22157-2-will@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2021-05-27 12:03:17 +01:00
parent 5ae632ed35
commit 58cc6b72a2
4 changed files with 0 additions and 7 deletions
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1
arch/arm64/include/asm/memory.h
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@ -138,7 +138,6 @@
#define MT_NORMAL_WT 3
#define MT_DEVICE_nGnRnE 4
#define MT_DEVICE_nGnRE 5
#define MT_DEVICE_GRE 6
/*
* Memory types for Stage-2 translation

1
arch/arm64/include/asm/sysreg.h
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@ -703,7 +703,6 @@
/* MAIR_ELx memory attributes (used by Linux) */
#define MAIR_ATTR_DEVICE_nGnRnE UL(0x00)
#define MAIR_ATTR_DEVICE_nGnRE UL(0x04)
#define MAIR_ATTR_DEVICE_GRE UL(0x0c)
#define MAIR_ATTR_NORMAL_NC UL(0x44)
#define MAIR_ATTR_NORMAL_WT UL(0xbb)
#define MAIR_ATTR_NORMAL_TAGGED UL(0xf0)

1
arch/arm64/mm/proc.S
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@ -58,7 +58,6 @@
#define MAIR_EL1_SET \
(MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRnE, MT_DEVICE_nGnRnE) | \
MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRE, MT_DEVICE_nGnRE) | \
MAIR_ATTRIDX(MAIR_ATTR_DEVICE_GRE, MT_DEVICE_GRE) | \
MAIR_ATTRIDX(MAIR_ATTR_NORMAL_NC, MT_NORMAL_NC) | \
MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL) | \
MAIR_ATTRIDX(MAIR_ATTR_NORMAL_WT, MT_NORMAL_WT) | \

4
arch/arm64/mm/ptdump.c
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@ -157,10 +157,6 @@ static const struct prot_bits pte_bits[] = {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_DEVICE_nGnRE),
.set = "DEVICE/nGnRE",
}, {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_DEVICE_GRE),
.set = "DEVICE/GRE",
}, {
.mask = PTE_ATTRINDX_MASK,
.val = PTE_ATTRINDX(MT_NORMAL_NC),