From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Wed, 16 May 2018 15:21:26 +0000 (+0200)
Subject: KVM: x86: hyperv: use defines when parsing hypercall parameters
X-Git-Tag: v4.18-rc1~45^2~22
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=142c95da92e847312f4d32cc8870719fe335d121;p=uclinux-h8%2Flinux.git

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 5708e951a5c6..dcfeae2deafa 100644
--- 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);