| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
|---|---|
| 2 | /* |
| 3 | * Extracted from cputable.c |
| 4 | * |
| 5 | * Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org) |
| 6 | * |
| 7 | * Modifications for ppc64: |
| 8 | * Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com> |
| 9 | * Copyright (C) 2005 Stephen Rothwell, IBM Corporation |
| 10 | */ |
| 11 | |
| 12 | #include <linux/export.h> |
| 13 | #include <linux/cache.h> |
| 14 | #include <linux/of.h> |
| 15 | |
| 16 | #include <asm/firmware.h> |
| 17 | #include <asm/kvm_guest.h> |
| 18 | |
| 19 | #ifdef CONFIG_PPC64 |
| 20 | unsigned long powerpc_firmware_features __read_mostly; |
| 21 | EXPORT_SYMBOL_GPL(powerpc_firmware_features); |
| 22 | #endif |
| 23 | |
| 24 | #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_KVM_GUEST) |
| 25 | DEFINE_STATIC_KEY_FALSE(kvm_guest); |
| 26 | EXPORT_SYMBOL_GPL(kvm_guest); |
| 27 | |
| 28 | int __init check_kvm_guest(void) |
| 29 | { |
| 30 | struct device_node *hyper_node; |
| 31 | |
| 32 | hyper_node = of_find_node_by_path(path: "/hypervisor"); |
| 33 | if (!hyper_node) |
| 34 | return 0; |
| 35 | |
| 36 | if (of_device_is_compatible(device: hyper_node, "linux,kvm")) |
| 37 | static_branch_enable(&kvm_guest); |
| 38 | |
| 39 | of_node_put(node: hyper_node); |
| 40 | return 0; |
| 41 | } |
| 42 | core_initcall(check_kvm_guest); // before kvm_guest_init() |
| 43 | #endif |
| 44 |