From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Jonathan Corbet <corbet@lwn.net>
Cc: linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] Documentation/arm64: add memory layout with 4KB pages + VA39-bit
Date: Thu, 30 Sep 2021 18:50:26 +0800 [thread overview]
Message-ID: <20210930185026.1609f12e@xhacker.debian> (raw)
The 4KB pages + 3 levels (39-bit) combination is also widely used in
arm64 world, add the memory layout description for this combination.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
Documentation/arm64/memory.rst | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/Documentation/arm64/memory.rst b/Documentation/arm64/memory.rst
index 901cd094f4ec..d1745b570f0c 100644
--- a/Documentation/arm64/memory.rst
+++ b/Documentation/arm64/memory.rst
@@ -26,6 +26,23 @@ The swapper_pg_dir address is written to TTBR1 and never written to
TTBR0.
+AArch64 Linux memory layout with 4KB pages + 3 levels (39-bit)::
+ Start End Size Use
+ -----------------------------------------------------------------------
+ 0000000000000000 0000007fffffffff 512GB user
+ ffffff8000000000 ffffffbfffffffff 256GB kernel logical memory map
+ [ffffffb000000000 ffffffbfffffffff] 64GB [kasan shadow region]
+ ffffffc000000000 ffffffc007ffffff 128MB bpf jit region
+ ffffffc008000000 ffffffc00fffffff 128MB modules
+ ffffffc010000000 fffffffdefffffff 253440MB vmalloc
+ fffffffdf0000000 fffffffdfdffffff 224MB fixed mappings (top down)
+ fffffffdfe000000 fffffffdfe7fffff 8MB [guard region]
+ fffffffdfe800000 fffffffdff7fffff 16MB PCI I/O space
+ fffffffdff800000 fffffffdffffffff 8MB [guard region]
+ fffffffe00000000 ffffffffefffffff 4GB vmemmap
+ ffffffff00000000 ffffffffffffffff 4GB [guard region]
+
+
AArch64 Linux memory layout with 4KB pages + 4 levels (48-bit)::
Start End Size Use
--
2.33.0
next reply other threads:[~2021-09-30 10:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 10:50 Jisheng Zhang [this message]
2021-10-06 17:14 ` [PATCH] Documentation/arm64: add memory layout with 4KB pages + VA39-bit Catalin Marinas
2021-10-08 2:11 ` Jisheng Zhang
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