From: Alexandre Ghiti <alex@ghiti.fr> To: Jonathan Corbet <corbet@lwn.net>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-mm@kvack.org Cc: Alexandre Ghiti <alex@ghiti.fr> Subject: [PATCH 0/3] Move kernel mapping outside the linear mapping Date: Thu, 25 Feb 2021 03:04:50 -0500 [thread overview] Message-ID: <20210225080453.1314-1-alex@ghiti.fr> (raw) I decided to split sv48 support in small series to ease the review. This patchset pushes the kernel mapping (modules and BPF too) to the last 4GB of the 64bit address space, this allows to: - implement relocatable kernel (that will come later in another patchset) that requires to move the kernel mapping out of the linear mapping to avoid to copy the kernel at a different physical address. - have a single kernel that is not relocatable (and then that avoids the performance penalty imposed by PIC kernel) for both sv39 and sv48. The first patch implements this behaviour, the second patch introduces a documentation that describes the virtual address space layout of the 64bit kernel and the last patch is taken from my sv48 series where I simply added the dump of the modules/kernel/BPF mapping. I removed the Reviewed-by on the first patch since it changed enough from last time and deserves a second look. Alexandre Ghiti (3): riscv: Move kernel mapping outside of linear mapping Documentation: riscv: Add documentation that describes the VM layout riscv: Prepare ptdump for vm layout dynamic addresses Documentation/riscv/index.rst | 1 + Documentation/riscv/vm-layout.rst | 61 ++++++++++++++++++++++ arch/riscv/boot/loader.lds.S | 3 +- arch/riscv/include/asm/page.h | 18 ++++++- arch/riscv/include/asm/pgtable.h | 37 +++++++++---- arch/riscv/include/asm/set_memory.h | 1 + arch/riscv/kernel/head.S | 3 +- arch/riscv/kernel/module.c | 6 +-- arch/riscv/kernel/setup.c | 3 ++ arch/riscv/kernel/vmlinux.lds.S | 3 +- arch/riscv/mm/fault.c | 13 +++++ arch/riscv/mm/init.c | 81 +++++++++++++++++++++++------ arch/riscv/mm/kasan_init.c | 9 ++++ arch/riscv/mm/physaddr.c | 2 +- arch/riscv/mm/ptdump.c | 67 +++++++++++++++++++----- 15 files changed, 258 insertions(+), 50 deletions(-) create mode 100644 Documentation/riscv/vm-layout.rst -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Ghiti <alex@ghiti.fr> To: Jonathan Corbet <corbet@lwn.net>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-mm@kvack.org Cc: Alexandre Ghiti <alex@ghiti.fr> Subject: [PATCH 0/3] Move kernel mapping outside the linear mapping Date: Thu, 25 Feb 2021 03:04:50 -0500 [thread overview] Message-ID: <20210225080453.1314-1-alex@ghiti.fr> (raw) I decided to split sv48 support in small series to ease the review. This patchset pushes the kernel mapping (modules and BPF too) to the last 4GB of the 64bit address space, this allows to: - implement relocatable kernel (that will come later in another patchset) that requires to move the kernel mapping out of the linear mapping to avoid to copy the kernel at a different physical address. - have a single kernel that is not relocatable (and then that avoids the performance penalty imposed by PIC kernel) for both sv39 and sv48. The first patch implements this behaviour, the second patch introduces a documentation that describes the virtual address space layout of the 64bit kernel and the last patch is taken from my sv48 series where I simply added the dump of the modules/kernel/BPF mapping. I removed the Reviewed-by on the first patch since it changed enough from last time and deserves a second look. Alexandre Ghiti (3): riscv: Move kernel mapping outside of linear mapping Documentation: riscv: Add documentation that describes the VM layout riscv: Prepare ptdump for vm layout dynamic addresses Documentation/riscv/index.rst | 1 + Documentation/riscv/vm-layout.rst | 61 ++++++++++++++++++++++ arch/riscv/boot/loader.lds.S | 3 +- arch/riscv/include/asm/page.h | 18 ++++++- arch/riscv/include/asm/pgtable.h | 37 +++++++++---- arch/riscv/include/asm/set_memory.h | 1 + arch/riscv/kernel/head.S | 3 +- arch/riscv/kernel/module.c | 6 +-- arch/riscv/kernel/setup.c | 3 ++ arch/riscv/kernel/vmlinux.lds.S | 3 +- arch/riscv/mm/fault.c | 13 +++++ arch/riscv/mm/init.c | 81 +++++++++++++++++++++++------ arch/riscv/mm/kasan_init.c | 9 ++++ arch/riscv/mm/physaddr.c | 2 +- arch/riscv/mm/ptdump.c | 67 +++++++++++++++++++----- 15 files changed, 258 insertions(+), 50 deletions(-) create mode 100644 Documentation/riscv/vm-layout.rst -- 2.20.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next reply other threads:[~2021-02-25 8:06 UTC|newest] Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-25 8:04 Alexandre Ghiti [this message] 2021-02-25 8:04 ` [PATCH 0/3] Move kernel mapping outside the linear mapping Alexandre Ghiti 2021-02-25 8:04 ` [PATCH 1/3] riscv: Move kernel mapping outside of " Alexandre Ghiti 2021-02-25 8:04 ` Alexandre Ghiti 2021-02-25 8:04 ` [PATCH 2/3] Documentation: riscv: Add documentation that describes the VM layout Alexandre Ghiti 2021-02-25 8:04 ` Alexandre Ghiti 2021-02-25 10:34 ` David Hildenbrand 2021-02-25 10:34 ` David Hildenbrand 2021-02-25 11:56 ` Alex Ghiti 2021-02-25 11:56 ` Alex Ghiti 2021-03-10 11:42 ` Arnd Bergmann 2021-03-10 11:42 ` Arnd Bergmann 2021-03-10 11:42 ` Arnd Bergmann 2021-03-10 19:12 ` Alex Ghiti 2021-03-10 19:12 ` Alex Ghiti 2021-03-11 8:42 ` Arnd Bergmann 2021-03-11 8:42 ` Arnd Bergmann 2021-03-11 8:42 ` Arnd Bergmann 2021-03-13 8:23 ` Alex Ghiti 2021-03-13 8:23 ` Alex Ghiti 2021-03-13 22:34 ` Arnd Bergmann 2021-03-13 22:34 ` Arnd Bergmann 2021-03-13 22:34 ` Arnd Bergmann 2021-02-25 8:04 ` [PATCH 3/3] riscv: Prepare ptdump for vm layout dynamic addresses Alexandre Ghiti 2021-02-25 8:04 ` Alexandre Ghiti 2021-03-10 2:54 ` [PATCH 0/3] Move kernel mapping outside the linear mapping Palmer Dabbelt 2021-03-10 2:54 ` Palmer Dabbelt 2021-03-13 9:26 ` Alex Ghiti 2021-03-13 9:26 ` Alex Ghiti 2021-03-17 5:05 ` Palmer Dabbelt 2021-03-17 5:05 ` Palmer Dabbelt 2021-03-20 8:48 ` Alex Ghiti 2021-03-20 8:48 ` Alex Ghiti
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