linux-kernel - [PATCH v2 0/8] vdso: Use only headers from the vdso/ namespace

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Message-Id: <20240923141943.133551-1-vincenzo.frascino@arm.com>
Date: Mon, 23 Sep 2024 15:19:35 +0100
From: Vincenzo Frascino <vincenzo.frascino@....com>
To: linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org,
	linux-mm@...ck.org
Cc: Vincenzo Frascino <vincenzo.frascino@....com>,
	Andy Lutomirski <luto@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Jason A . Donenfeld" <Jason@...c4.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Naveen N Rao <naveen@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	Theodore Ts'o <tytso@....edu>,
	Arnd Bergmann <arnd@...db.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: [PATCH v2 0/8] vdso: Use only headers from the vdso/ namespace

The recent implementation of getrandom in the generic vdso library,
includes headers from outside of the vdso/ namespace.

The purpose of this patch series is to refactor the code to make sure
that the library uses only the allowed namespace.

The series has been rebased on [1] to simplify the testing. 

[1] git://git.kernel.org/pub/scm/linux/kernel/git/crng/random.git master

Changes:
--------
v2:
  - Added common PAGE_SIZE and PAGE_MASK definitions.
  - Added opencoded macros where not defined.
  - Dropped VDSO_PAGE_* redefinitions.

Cc: Andy Lutomirski <luto@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Jason A. Donenfeld <Jason@...c4.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Nicholas Piggin <npiggin@...il.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: Naveen N Rao <naveen@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Theodore Ts'o <tytso@....edu>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>

Vincenzo Frascino (8):
  x86: vdso: Introduce asm/vdso/mman.h
  arm64: vdso: Introduce asm/vdso/mman.h
  vdso: Introduce vdso/mman.h
  vdso: Introduce vdso/page.h
  x86: vdso: Modify asm/vdso/getrandom.h to include datapage
  vdso: Modify vdso/getrandom.h to include the asm header
  vdso: Introduce uapi/vdso/random.h
  vdso: Modify getrandom to include the correct namespace.

 arch/alpha/include/asm/page.h         |  6 +----
 arch/arc/include/uapi/asm/page.h      |  7 +++--
 arch/arm/include/asm/page.h           |  5 +---
 arch/arm64/include/asm/page-def.h     |  5 +---
 arch/arm64/include/asm/vdso/mman.h    | 15 +++++++++++
 arch/csky/include/asm/page.h          |  8 ++----
 arch/hexagon/include/asm/page.h       |  4 +--
 arch/loongarch/include/asm/page.h     |  7 +----
 arch/m68k/include/asm/page.h          |  6 ++---
 arch/microblaze/include/asm/page.h    |  5 +---
 arch/mips/include/asm/page.h          |  7 +----
 arch/nios2/include/asm/page.h         |  7 +----
 arch/openrisc/include/asm/page.h      | 11 +-------
 arch/parisc/include/asm/page.h        |  4 +--
 arch/powerpc/include/asm/page.h       | 10 +------
 arch/riscv/include/asm/page.h         |  4 +--
 arch/s390/include/asm/page.h          |  4 +--
 arch/sh/include/asm/page.h            |  6 ++---
 arch/sparc/include/asm/page_32.h      |  4 +--
 arch/sparc/include/asm/page_64.h      |  4 +--
 arch/um/include/asm/page.h            |  5 +---
 arch/x86/include/asm/page_types.h     |  5 +---
 arch/x86/include/asm/vdso/getrandom.h |  2 ++
 arch/x86/include/asm/vdso/mman.h      | 15 +++++++++++
 arch/xtensa/include/asm/page.h        |  8 +-----
 include/uapi/linux/random.h           | 26 +-----------------
 include/uapi/vdso/random.h            | 38 +++++++++++++++++++++++++++
 include/vdso/datapage.h               |  2 ++
 include/vdso/getrandom.h              |  1 +
 include/vdso/mman.h                   |  7 +++++
 include/vdso/page.h                   | 18 +++++++++++++
 lib/vdso/getrandom.c                  | 22 ++++++++--------
 32 files changed, 137 insertions(+), 141 deletions(-)
 create mode 100644 arch/arm64/include/asm/vdso/mman.h
 create mode 100644 arch/x86/include/asm/vdso/mman.h
 create mode 100644 include/uapi/vdso/random.h
 create mode 100644 include/vdso/mman.h
 create mode 100644 include/vdso/page.h

-- 
2.34.1