KVM: x86: hyperv: use defines when parsing hypercall parameters

Avoid open-coding offsets for hypercall input parameters, we already
have defines for them.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 5708e95..dcfeae2 100644 (file)
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1341,9 +1341,9 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
 #endif
 
        code = param & 0xffff;
-       fast = (param >> 16) & 0x1;
-       rep_cnt = (param >> 32) & 0xfff;
-       rep_idx = (param >> 48) & 0xfff;
+       fast = !!(param & HV_HYPERCALL_FAST_BIT);
+       rep_cnt = (param >> HV_HYPERCALL_REP_COMP_OFFSET) & 0xfff;
+       rep_idx = (param >> HV_HYPERCALL_REP_START_OFFSET) & 0xfff;
 
        trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);