mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 22:37:45 -04:00
Wanpeng Li
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 <[email protected]> Cc: Radim Krčmář <[email protected]> Cc: Eduardo Habkost <[email protected]> Signed-off-by: Wanpeng Li <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]> Signed-off-by: Radim Krčmář <[email protected]>
18 lines
402 B
C
18 lines
402 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_KVM_PARA_H
|
|
#define __LINUX_KVM_PARA_H
|
|
|
|
#include <uapi/linux/kvm_para.h>
|
|
|
|
|
|
static inline bool kvm_para_has_feature(unsigned int feature)
|
|
{
|
|
return !!(kvm_arch_para_features() & (1UL << feature));
|
|
}
|
|
|
|
static inline bool kvm_para_has_hint(unsigned int feature)
|
|
{
|
|
return !!(kvm_arch_para_hints() & (1UL << feature));
|
|
}
|
|
#endif /* __LINUX_KVM_PARA_H */
|