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("/hypervisor"); 33 if (!hyper_node) 34 return 0; 35 36 if (of_device_is_compatible(hyper_node, "linux,kvm")) 37 static_branch_enable(&kvm_guest); 38 39 of_node_put(hyper_node); 40 return 0; 41 } 42 core_initcall(check_kvm_guest); // before kvm_guest_init() 43 #endif 44