From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: kernel-team@android.com, 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>,
Mark Rutland <mark.rutland@arm.com>
Subject: [PATCH v2 0/3] Free up a couple of MAIRs
Date: Thu, 27 May 2021 12:03:16 +0100 [thread overview]
Message-ID: <20210527110319.22157-1-will@kernel.org> (raw)
Hi folks,
This is version two of the patches I previously posted here:
v1: https://lore.kernel.org/r/20210506095034.15246-1-will@kernel.org
Changes since v1 include:
* Only consider EFI_MEMORY_WT as a last resort
* Emit warning when using Normal-NC for EFI_MEMORY_WT
* Added acks
* Rebased onto -rc3
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 is unheard of in isolation.
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).
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>
Cc: Mark Rutland <mark.rutland@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 | 22 +++++++++++++++++-----
arch/arm64/mm/proc.S | 2 --
arch/arm64/mm/ptdump.c | 4 ----
6 files changed, 19 insertions(+), 18 deletions(-)
--
2.31.1.818.g46aad6cb9e-goog
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-05-27 11:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-27 11:03 Will Deacon [this message]
2021-05-27 11:03 ` [PATCH v2 1/3] arm64: mm: Remove unused support for Device-GRE memory type Will Deacon
2021-05-27 11:03 ` [PATCH v2 2/3] arm64: acpi: Map EFI_MEMORY_WT memory as Normal-NC Will Deacon
2021-05-27 11:03 ` [PATCH v2 3/3] arm64: mm: Remove unused support for Normal-WT memory type Will Deacon
2021-06-01 18:21 ` [PATCH v2 0/3] Free up a couple of MAIRs Will Deacon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210527110319.22157-1-will@kernel.org \
--to=will@kernel.org \
--cc=ardb@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=hch@lst.de \
--cc=kernel-team@android.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=mark.rutland@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.