Wu X.C. <bobwxc@xxxxxxxx> 于2022年6月9日周四 00:45写道：
>
> On Wed, Jun 08, 2022 at 07:08:21PM +0800, Binbin Zhou wrote:
> > Synchronous translation from upstream commit 9d19f2b5256e
> > ("Documentation: riscv: Add sv48 description to VM layout")
> >
> > Signed-off-by: Binbin Zhou <zhoubinbin@xxxxxxxxxxx>
>
> Reviewed-by: Wu XiangCheng <bobwxc@xxxxxxxx>
Reviewed-by: Yanteng Si <siyanteng@xxxxxxxxxxx>
Thanks,
Yanteng
>
> Thanks :)
>
> > ---
> > .../translations/zh_CN/riscv/vm-layout.rst | 37 +++++++++++++++++++
> > 1 file changed, 37 insertions(+)
> >
> > diff --git a/Documentation/translations/zh_CN/riscv/vm-layout.rst b/Documentation/translations/zh_CN/riscv/vm-layout.rst
> > index 585cb89317a3..91884e2dfff8 100644
> > --- a/Documentation/translations/zh_CN/riscv/vm-layout.rst
> > +++ b/Documentation/translations/zh_CN/riscv/vm-layout.rst
> > @@ -6,6 +6,7 @@
> > :翻译:
> >
> > 司延腾 Yanteng Si <siyanteng@xxxxxxxxxxx>
> > + Binbin Zhou <zhoubinbin@xxxxxxxxxxx>
> >
> > ============================
> > RISC-V Linux上的虚拟内存布局
> > @@ -65,3 +66,39 @@ RISC-V Linux Kernel SV39
> > ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF
> > ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel
> > __________________|____________|__________________|_________|____________________________________________________________
> > +
> > +
> > +RISC-V Linux Kernel SV48
> > +------------------------
> > +
> > +::
> > +
> > + ========================================================================================================================
> > + 开始地址 | 偏移 | 结束地址 | 大小 | 虚拟内存区域描述
> > + ========================================================================================================================
> > + | | | |
> > + 0000000000000000 | 0 | 00007fffffffffff | 128 TB | 用户空间虚拟内存，每个内存管理器不同
> > + __________________|____________|__________________|_________|___________________________________________________________
> > + | | | |
> > + 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
> > + | | | | 开始偏移的非经典虚拟内存地址空洞。
> > + | | | |
> > + __________________|____________|__________________|_________|___________________________________________________________
> > + |
> > + | 内核空间的虚拟内存，在所有进程之间共享:
> > + ____________________________________________________________|___________________________________________________________
> > + | | | |
> > + ffff8d7ffee00000 | -114.5 TB | ffff8d7ffeffffff | 2 MB | fixmap
> > + ffff8d7fff000000 | -114.5 TB | ffff8d7fffffffff | 16 MB | PCI io
> > + ffff8d8000000000 | -114.5 TB | ffff8f7fffffffff | 2 TB | vmemmap
> > + ffff8f8000000000 | -112.5 TB | ffffaf7fffffffff | 32 TB | vmalloc/ioremap space
> > + ffffaf8000000000 | -80.5 TB | ffffef7fffffffff | 64 TB | 直接映射所有物理内存
> > + ffffef8000000000 | -16.5 TB | fffffffeffffffff | 16.5 TB | kasan
> > + __________________|____________|__________________|_________|____________________________________________________________
> > + |
> > + | 从此处开始，与39-bit布局相同：
> > + ____________________________________________________________|____________________________________________________________
> > + | | | |
> > + ffffffff00000000 | -4 GB | ffffffff7fffffff | 2 GB | modules, BPF
> > + ffffffff80000000 | -2 GB | ffffffffffffffff | 2 GB | kernel
> > + __________________|____________|__________________|_________|____________________________________________________________
> > --
> > 2.20.1
