docs/zh_CN: riscv: Update the translation of vm-layout.rst to 5.19-rc1
Synchronous translation from upstream commit 9d19f2b525
("Documentation: riscv: Add sv48 description to VM layout")
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/10cd6a241a0266d1d19ee5f0b2177d7d14d17ed2.1654685338.git.zhoubinbin@loongson.cn
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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@ -6,6 +6,7 @@
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:翻译:
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司延腾 Yanteng Si <siyanteng@loongson.cn>
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Binbin Zhou <zhoubinbin@loongson.cn>
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============================
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RISC-V Linux上的虚拟内存布局
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@ -65,3 +66,39 @@ RISC-V Linux Kernel SV39
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ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF
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ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel
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__________________|____________|__________________|_________|____________________________________________________________
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RISC-V Linux Kernel SV48
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------------------------
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::
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========================================================================================================================
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开始地址 | 偏移 | 结束地址 | 大小 | 虚拟内存区域描述
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========================================================================================================================
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0000000000000000 | 0 | 00007fffffffffff | 128 TB | 用户空间虚拟内存,每个内存管理器不同
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__________________|____________|__________________|_________|___________________________________________________________
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0000800000000000 | +128 TB | ffff7fffffffffff | ~16M TB | ... 巨大的、几乎64位宽的直到内核映射的-128TB地方
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| | | | 开始偏移的非经典虚拟内存地址空洞。
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__________________|____________|__________________|_________|___________________________________________________________
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| 内核空间的虚拟内存,在所有进程之间共享:
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____________________________________________________________|___________________________________________________________
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ffff8d7ffee00000 | -114.5 TB | ffff8d7ffeffffff | 2 MB | fixmap
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ffff8d7fff000000 | -114.5 TB | ffff8d7fffffffff | 16 MB | PCI io
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ffff8d8000000000 | -114.5 TB | ffff8f7fffffffff | 2 TB | vmemmap
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ffff8f8000000000 | -112.5 TB | ffffaf7fffffffff | 32 TB | vmalloc/ioremap space
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ffffaf8000000000 | -80.5 TB | ffffef7fffffffff | 64 TB | 直接映射所有物理内存
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ffffef8000000000 | -16.5 TB | fffffffeffffffff | 16.5 TB | kasan
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__________________|____________|__________________|_________|____________________________________________________________
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| 从此处开始,与39-bit布局相同:
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____________________________________________________________|____________________________________________________________
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ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF
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ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel
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__________________|____________|__________________|_________|____________________________________________________________
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