mirror of
https://github.com/torvalds/linux
synced 2024-07-23 19:49:59 +00:00
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>
33 lines
549 B
C
33 lines
549 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_GENERIC_KVM_PARA_H
|
|
#define _ASM_GENERIC_KVM_PARA_H
|
|
|
|
#include <uapi/asm-generic/kvm_para.h>
|
|
|
|
|
|
/*
|
|
* This function is used by architectures that support kvm to avoid issuing
|
|
* false soft lockup messages.
|
|
*/
|
|
static inline bool kvm_check_and_clear_guest_paused(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline unsigned int kvm_arch_para_features(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int kvm_arch_para_hints(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool kvm_para_available(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
#endif
|