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KVM: Move nVMX's lockdep logic for vcpu->mutex to a common helper

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Extract nVMX's lockdep assertion that a vCPU is locked or otherwise
unreachable into a common helper, as KVM x86 is about to gain another user,
but there is nothing x86-specific about the logic, i.e. the assertion may
be useful for other architectures.

No functional change intended.

Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Link: https://patch.msgid.link/20260630225619.511632-9-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2026-06-30 15:56:15 -07:00
parent b29125ead0
commit e34be29ecd
2 changed files with 8 additions and 4 deletions
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6
arch/x86/kvm/vmx/nested.h
View File

@ -57,16 +57,14 @@ bool nested_vmx_check_io_bitmaps(struct kvm_vcpu *vcpu, unsigned int port,
static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu)
{
lockdep_assert_once(lockdep_is_held(&vcpu->mutex) ||
!refcount_read(&vcpu->kvm->users_count));
kvm_lockdep_assert_vcpu_is_locked_or_unreachable(vcpu);
return to_vmx(vcpu)->nested.cached_vmcs12;
}
static inline struct vmcs12 *get_shadow_vmcs12(struct kvm_vcpu *vcpu)
{
lockdep_assert_once(lockdep_is_held(&vcpu->mutex) ||
!refcount_read(&vcpu->kvm->users_count));
kvm_lockdep_assert_vcpu_is_locked_or_unreachable(vcpu);
return to_vmx(vcpu)->nested.cached_shadow_vmcs12;
}

6
include/linux/kvm_host.h
View File

@ -989,6 +989,12 @@ static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
lockdep_is_held(&kvm->slots_lock));
}
static inline void kvm_lockdep_assert_vcpu_is_locked_or_unreachable(struct kvm_vcpu *vcpu)
{
lockdep_assert_once(lockdep_is_held(&vcpu->mutex) ||
!refcount_read(&vcpu->kvm->users_count));
}
static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
{
int num_vcpus = atomic_read(&kvm->online_vcpus);