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a4429e53c9
This patch introduces kvm_para_has_hint() to query for hints about the configuration of the guests. The first hint KVM_HINTS_DEDICATED, is set if the guest has dedicated physical CPUs for each vCPU (i.e. pinning and no over-commitment). This allows optimizing spinlocks and tells the guest to avoid PV TLB flush. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
18 lines
402 B
C
18 lines
402 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_KVM_PARA_H
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#define __LINUX_KVM_PARA_H
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#include <uapi/linux/kvm_para.h>
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static inline bool kvm_para_has_feature(unsigned int feature)
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{
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return !!(kvm_arch_para_features() & (1UL << feature));
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}
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static inline bool kvm_para_has_hint(unsigned int feature)
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{
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return !!(kvm_arch_para_hints() & (1UL << feature));
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}
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#endif /* __LINUX_KVM_PARA_H */
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