Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * PowerPC ELF notes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright 2019, IBM Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/elfnote.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/elfnote.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * Ultravisor-capable bit (PowerNV only).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * Bit 0 indicates that the powerpc kernel binary knows how to run in an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * ultravisor-enabled system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * In an ultravisor-enabled system, some machine resources are now controlled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * by the ultravisor. If the kernel is not ultravisor-capable, but it ends up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  * being run on a machine with ultravisor, the kernel will probably crash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  * trying to access ultravisor resources. For instance, it may crash in early
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  * boot trying to set the partition table entry 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  * In an ultravisor-enabled system, a bootloader could warn the user or prevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  * the kernel from being run if the PowerPC ultravisor capability doesn't exist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * or the Ultravisor-capable bit is not set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #ifdef CONFIG_PPC_POWERNV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define PPCCAP_ULTRAVISOR_BIT		(1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define PPCCAP_ULTRAVISOR_BIT		0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  * Add the PowerPC Capabilities in the binary ELF note. It is a bitmap that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  * can be used to advertise kernel capabilities to userland.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define PPC_CAPABILITIES_BITMAP (PPCCAP_ULTRAVISOR_BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) ELFNOTE(PowerPC, PPC_ELFNOTE_CAPABILITIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	.long PPC_CAPABILITIES_BITMAP)