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KVM: add kvm_{test,clear}_request to replace {test,clear}_bit

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Users were expected to use kvm_check_request() for testing and clearing,
but request have expanded their use since then and some users want to
only test or do a faster clear.

Make sure that requests are not directly accessed with bit operations.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Radim Krčmář
2017-04-26 22:32:19 +02:00
committed by Paolo Bonzini
parent cf9bdd3577
commit 72875d8a4d
9 changed files with 24 additions and 14 deletions
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14
include/linux/kvm_host.h
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@@ -1079,10 +1079,20 @@ static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
set_bit(req, &vcpu->requests);
}
static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
{
return test_bit(req, &vcpu->requests);
}
static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
{
clear_bit(req, &vcpu->requests);
}
static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
{
if (test_bit(req, &vcpu->requests)) {
clear_bit(req, &vcpu->requests);
if (kvm_test_request(req, vcpu)) {
kvm_clear_request(req, vcpu);
/*
* Ensure the rest of the request is visible to kvm_check_request's