12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 28882a4daSDavid Gibson /* 38882a4daSDavid Gibson * Extracted from cputable.c 48882a4daSDavid Gibson * 58882a4daSDavid Gibson * Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org) 68882a4daSDavid Gibson * 78882a4daSDavid Gibson * Modifications for ppc64: 88882a4daSDavid Gibson * Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com> 98882a4daSDavid Gibson * Copyright (C) 2005 Stephen Rothwell, IBM Corporation 108882a4daSDavid Gibson */ 118882a4daSDavid Gibson 12cab2e052SPaul Gortmaker #include <linux/export.h> 13cab2e052SPaul Gortmaker #include <linux/cache.h> 14107c5500SNicholas Piggin #include <linux/of.h> 158882a4daSDavid Gibson 168882a4daSDavid Gibson #include <asm/firmware.h> 1792cc6bf0SSrikar Dronamraju #include <asm/kvm_guest.h> 188882a4daSDavid Gibson 19107c5500SNicholas Piggin #ifdef CONFIG_PPC64 200b9612c2SAnton Blanchard unsigned long powerpc_firmware_features __read_mostly; 21d0160bf0SMichael Ellerman EXPORT_SYMBOL_GPL(powerpc_firmware_features); 22107c5500SNicholas Piggin #endif 23107c5500SNicholas Piggin 24107c5500SNicholas Piggin #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_KVM_GUEST) 25a21d1becSSrikar Dronamraju DEFINE_STATIC_KEY_FALSE(kvm_guest); check_kvm_guest(void)2695839225SMichael Ellermanint __init check_kvm_guest(void) 27107c5500SNicholas Piggin { 28107c5500SNicholas Piggin struct device_node *hyper_node; 29107c5500SNicholas Piggin 30107c5500SNicholas Piggin hyper_node = of_find_node_by_path("/hypervisor"); 31107c5500SNicholas Piggin if (!hyper_node) 3295839225SMichael Ellerman return 0; 33107c5500SNicholas Piggin 34*56537fafSNathan Lynch if (of_device_is_compatible(hyper_node, "linux,kvm")) 35a21d1becSSrikar Dronamraju static_branch_enable(&kvm_guest); 3695839225SMichael Ellerman 37*56537fafSNathan Lynch of_node_put(hyper_node); 3895839225SMichael Ellerman return 0; 39107c5500SNicholas Piggin } 4095839225SMichael Ellerman core_initcall(check_kvm_guest); // before kvm_guest_init() 41107c5500SNicholas Piggin #endif 42