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| author |   Claudio Carvalho <cclaudio@linux.ibm.com> | 2019-08-29 12:50:20 -0300 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-08-30 09:40:15 +1000 |
| commit | 70ed86f4de5bd74dd2d884dcd2f3275c4cfe665f (patch) | |
| tree | 65d5e98e0364848fb3fa3006dffb57ca0d0bdfc4 /arch/powerpc/include/asm/elfnote.h | |
| parent | powerpc/powernv/ioda: Remove obsolete iommu_table_ops::exchange callbacks (diff) | |
| download | linux-dev-70ed86f4de5bd74dd2d884dcd2f3275c4cfe665f.tar.xz linux-dev-70ed86f4de5bd74dd2d884dcd2f3275c4cfe665f.zip | |
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 <paulus@ozlabs.org>
Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com>
[ maxiwell: Define the 'PowerPC' type in the elfnote.h ]
Signed-off-by: Maxiwell S. Garcia <maxiwell@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190829155021.2915-2-maxiwell@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/elfnote.h')
| -rw-r--r-- | arch/powerpc/include/asm/elfnote.h | 24 |
1 files changed, 24 insertions, 0 deletions
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__ */ |