a21d1becaa
Introduce a static branch that would be set during boot if the OS happens to be a KVM guest. Subsequent checks to see if we are on KVM will rely on this static branch. This static branch would be used in vcpu_is_preempted() in a subsequent patch. Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: Waiman Long <longman@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20201202050456.164005-4-srikar@linux.vnet.ibm.com
25 lines
572 B
C
25 lines
572 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 IBM Corporation
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*/
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#ifndef _ASM_POWERPC_KVM_GUEST_H_
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#define _ASM_POWERPC_KVM_GUEST_H_
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#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_KVM_GUEST)
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#include <linux/jump_label.h>
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DECLARE_STATIC_KEY_FALSE(kvm_guest);
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static inline bool is_kvm_guest(void)
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{
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return static_branch_unlikely(&kvm_guest);
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}
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bool check_kvm_guest(void);
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#else
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static inline bool is_kvm_guest(void) { return false; }
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static inline bool check_kvm_guest(void) { return false; }
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#endif
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#endif /* _ASM_POWERPC_KVM_GUEST_H_ */
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