blob: bcdad15395ddd73bd36a510c4456c763757b059a [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
* PowerPC ELF notes.
* Copyright 2019, IBM Corporation
#include <linux/elfnote.h>
#include <asm/elfnote.h>
* Ultravisor-capable bit (PowerNV only).
* Bit 0 indicates that the powerpc kernel binary knows how to run in an
* ultravisor-enabled system.
* In an ultravisor-enabled system, some machine resources are now controlled
* by the ultravisor. If the kernel is not ultravisor-capable, but it ends up
* being run on a machine with ultravisor, the kernel will probably crash
* trying to access ultravisor resources. For instance, it may crash in early
* boot trying to set the partition table entry 0.
* In an ultravisor-enabled system, a bootloader could warn the user or prevent
* the kernel from being run if the PowerPC ultravisor capability doesn't exist
* or the Ultravisor-capable bit is not set.
#define PPCCAP_ULTRAVISOR_BIT (1 << 0)
* Add the PowerPC Capabilities in the binary ELF note. It is a bitmap that
* can be used to advertise kernel capabilities to userland.