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KVM: x86: Query vcpu->vcpu_idx directly and drop its accessor, again

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Read vcpu->vcpu_idx directly instead of bouncing through the one-line
wrapper, kvm_vcpu_get_idx(), and drop the wrapper.  The wrapper is a
remnant of the original implementation and serves no purpose; remove it
(again) before it gains more users.

kvm_vcpu_get_idx() was removed in the not-too-distant past by commit
4eeef24241 ("KVM: x86: Query vcpu->vcpu_idx directly and drop its
accessor"), but was unintentionally re-introduced by commit a54d806688
("KVM: Keep memslots in tree-based structures instead of array-based ones"),
likely due to a rebase goof.  The wrapper then managed to gain users in
KVM's Xen code.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Link: https://lore.kernel.org/r/20220614225615.3843835-1-seanjc@google.com
This commit is contained in:
Sean Christopherson 2022-06-14 22:56:15 +00:00
parent 6e1d2a3f25
commit 79f772b9e8
2 changed files with 5 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/kvm/xen.c
View File

@ -1049,7 +1049,7 @@ static bool kvm_xen_schedop_poll(struct kvm_vcpu *vcpu, bool longmode,
else
vcpu->arch.xen.poll_evtchn = -1;
set_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.xen.poll_mask);
set_bit(vcpu->vcpu_idx, vcpu->kvm->arch.xen.poll_mask);
if (!wait_pending_event(vcpu, sched_poll.nr_ports, ports)) {
vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
@ -1071,7 +1071,7 @@ static bool kvm_xen_schedop_poll(struct kvm_vcpu *vcpu, bool longmode,
*r = 0;
out:
/* Really, this is only needed in case of timeout */
clear_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.xen.poll_mask);
clear_bit(vcpu->vcpu_idx, vcpu->kvm->arch.xen.poll_mask);
if (unlikely(sched_poll.nr_ports > 1))
kfree(ports);
@ -1311,7 +1311,7 @@ static void kvm_xen_check_poller(struct kvm_vcpu *vcpu, int port)
int poll_evtchn = vcpu->arch.xen.poll_evtchn;
if ((poll_evtchn == port || poll_evtchn == -1) &&
test_and_clear_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.xen.poll_mask)) {
test_and_clear_bit(vcpu->vcpu_idx, vcpu->kvm->arch.xen.poll_mask)) {
kvm_make_request(KVM_REQ_UNBLOCK, vcpu);
kvm_vcpu_kick(vcpu);
}
@ -1344,7 +1344,7 @@ int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe, struct kvm *kvm)
vcpu = kvm_get_vcpu_by_id(kvm, xe->vcpu_id);
if (!vcpu)
return -EINVAL;
WRITE_ONCE(xe->vcpu_idx, kvm_vcpu_get_idx(vcpu));
WRITE_ONCE(xe->vcpu_idx, vcpu->vcpu_idx);
}
if (!vcpu->arch.xen.vcpu_info_cache.active)
@ -1540,7 +1540,7 @@ int kvm_xen_setup_evtchn(struct kvm *kvm,
*/
vcpu = kvm_get_vcpu_by_id(kvm, ue->u.xen_evtchn.vcpu);
if (vcpu)
e->xen_evtchn.vcpu_idx = kvm_vcpu_get_idx(vcpu);
e->xen_evtchn.vcpu_idx = vcpu->vcpu_idx;
else
e->xen_evtchn.vcpu_idx = -1;

5
include/linux/kvm_host.h
View File

@ -907,11 +907,6 @@ static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
return NULL;
}
static inline int kvm_vcpu_get_idx(struct kvm_vcpu *vcpu)
{
return vcpu->vcpu_idx;
}
void kvm_destroy_vcpus(struct kvm *kvm);
void vcpu_load(struct kvm_vcpu *vcpu);