cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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note.S (1274B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * PowerPC ELF notes.
      4 *
      5 * Copyright 2019, IBM Corporation
      6 */
      7
      8#include <linux/elfnote.h>
      9#include <asm/elfnote.h>
     10
     11/*
     12 * Ultravisor-capable bit (PowerNV only).
     13 *
     14 * Bit 0 indicates that the powerpc kernel binary knows how to run in an
     15 * ultravisor-enabled system.
     16 *
     17 * In an ultravisor-enabled system, some machine resources are now controlled
     18 * by the ultravisor. If the kernel is not ultravisor-capable, but it ends up
     19 * being run on a machine with ultravisor, the kernel will probably crash
     20 * trying to access ultravisor resources. For instance, it may crash in early
     21 * boot trying to set the partition table entry 0.
     22 *
     23 * In an ultravisor-enabled system, a bootloader could warn the user or prevent
     24 * the kernel from being run if the PowerPC ultravisor capability doesn't exist
     25 * or the Ultravisor-capable bit is not set.
     26 */
     27#ifdef CONFIG_PPC_POWERNV
     28#define PPCCAP_ULTRAVISOR_BIT		(1 << 0)
     29#else
     30#define PPCCAP_ULTRAVISOR_BIT		0
     31#endif
     32
     33/*
     34 * Add the PowerPC Capabilities in the binary ELF note. It is a bitmap that
     35 * can be used to advertise kernel capabilities to userland.
     36 */
     37#define PPC_CAPABILITIES_BITMAP (PPCCAP_ULTRAVISOR_BIT)
     38
     39ELFNOTE(PowerPC, PPC_ELFNOTE_CAPABILITIES,
     40	.long PPC_CAPABILITIES_BITMAP)