From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will@kernel.org>, Christoph Hellwig <hch@lst.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Ard Biesheuvel <ardb@kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Subject: [PATCH 0/3] Free up a couple of MAIRs
Date: Thu, 6 May 2021 10:50:31 +0100 [thread overview]
Message-ID: <20210506095034.15246-1-will@kernel.org> (raw)
Hi folks,
Catalin pointed out that the Device-GRE memory type is unused, despite
having a MAIR allocation. In removing that, I noticed that we also
allocate Normal-WT despite it only being used for EFI_MEMORY_WT mappings,
which can use Normal-NC instead.
With these changes, we free up a couple of MAIR entries for more
interesting things (e.g. outer cacheability attributes if we need them
in future for the SLC).
Patches taken against the arm64 for-next/core branch.
Cheers,
Will
Cc: Christoph Hellwig <hch@lst.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
--->8
Will Deacon (3):
arm64: mm: Remove unused support for Device-GRE memory type
arm64: acpi: Map EFI_MEMORY_WT memory as Normal-NC
arm64: mm: Remove unused support for Normal-WT memory type
arch/arm64/include/asm/memory.h | 6 ++----
arch/arm64/include/asm/pgtable-prot.h | 1 -
arch/arm64/include/asm/sysreg.h | 2 --
arch/arm64/kernel/acpi.c | 10 +++-------
arch/arm64/mm/proc.S | 2 --
arch/arm64/mm/ptdump.c | 4 ----
6 files changed, 5 insertions(+), 20 deletions(-)
--
2.31.1.607.g51e8a6a459-goog
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next reply other threads:[~2021-05-06 9:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-06 9:50 Will Deacon [this message]
2021-05-06 9:50 ` [PATCH 1/3] arm64: mm: Remove unused support for Device-GRE memory type Will Deacon
2021-05-06 13:25 ` Catalin Marinas
2021-05-06 9:50 ` [PATCH 2/3] arm64: acpi: Map EFI_MEMORY_WT memory as Normal-NC Will Deacon
2021-05-06 10:14 ` Ard Biesheuvel
2021-05-06 13:25 ` Catalin Marinas
2021-05-06 17:45 ` Ard Biesheuvel
2021-05-06 10:20 ` Mark Rutland
2021-05-06 10:46 ` Will Deacon
2021-05-06 11:00 ` Mark Rutland
2021-05-06 11:30 ` Ard Biesheuvel
2021-05-06 9:50 ` [PATCH 3/3] arm64: mm: Remove unused support for Normal-WT memory type Will Deacon
2021-05-06 13:26 ` Catalin Marinas
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