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KVM: cleanup DR6/DR7 reserved bits checks

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kvm_dr6_valid and kvm_dr7_valid check that bits 63:32 are zero.  Using
them makes it easier to review the code for inconsistencies.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2020-11-13 08:31:09 -05:00
parent d89d04ab60
commit fd23800261
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/x86.c
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@@ -4422,9 +4422,9 @@ static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
if (dbgregs->flags)
return -EINVAL;
if (dbgregs->dr6 & ~0xffffffffull)
if (!kvm_dr6_valid(dbgregs->dr6))
return -EINVAL;
if (dbgregs->dr7 & ~0xffffffffull)
if (!kvm_dr7_valid(dbgregs->dr7))
return -EINVAL;
memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));