From 70ed86f4de5bd74dd2d884dcd2f3275c4cfe665f Mon Sep 17 00:00:00 2001 From: Claudio Carvalho Date: Thu, 29 Aug 2019 12:50:20 -0300 Subject: powerpc: Add PowerPC Capabilities ELF note Add the PowerPC name and the PPC_ELFNOTE_CAPABILITIES type in the kernel binary ELF note. This type is a bitmap that can be used to advertise kernel capabilities to userland. This patch also defines PPCCAP_ULTRAVISOR_BIT as being the bit zero. Suggested-by: Paul Mackerras Signed-off-by: Claudio Carvalho [ maxiwell: Define the 'PowerPC' type in the elfnote.h ] Signed-off-by: Maxiwell S. Garcia Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190829155021.2915-2-maxiwell@linux.ibm.com --- arch/powerpc/include/asm/elfnote.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 arch/powerpc/include/asm/elfnote.h (limited to 'arch/powerpc/include/asm/elfnote.h') diff --git a/arch/powerpc/include/asm/elfnote.h b/arch/powerpc/include/asm/elfnote.h new file mode 100644 index 000000000000..a201b6e9ae44 --- /dev/null +++ b/arch/powerpc/include/asm/elfnote.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * PowerPC ELF notes. + * + * Copyright 2019, IBM Corporation + */ + +#ifndef __ASM_POWERPC_ELFNOTE_H__ +#define __ASM_POWERPC_ELFNOTE_H__ + +/* + * These note types should live in a SHT_NOTE segment and have + * "PowerPC" in the name field. + */ + +/* + * The capabilities supported/required by this kernel (bitmap). + * + * This type uses a bitmap as "desc" field. Each bit is described + * in arch/powerpc/kernel/note.S + */ +#define PPC_ELFNOTE_CAPABILITIES 1 + +#endif /* __ASM_POWERPC_ELFNOTE_H__ */ -- cgit