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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
43 lines
752 B
C
43 lines
752 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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*
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* Copyright IBM Corp. 2008
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#ifndef __POWERPC_KVM_PARA_H__
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#define __POWERPC_KVM_PARA_H__
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#include <asm/kvm_guest.h>
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#include <uapi/asm/kvm_para.h>
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static inline int kvm_para_available(void)
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{
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return IS_ENABLED(CONFIG_KVM_GUEST) && is_kvm_guest();
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}
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static inline unsigned int kvm_arch_para_features(void)
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{
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unsigned long r;
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if (!kvm_para_available())
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return 0;
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if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r))
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return 0;
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return r;
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}
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static inline unsigned int kvm_arch_para_hints(void)
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{
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return 0;
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}
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static inline bool kvm_check_and_clear_guest_paused(void)
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{
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return false;
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}
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#endif /* __POWERPC_KVM_PARA_H__ */
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