From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: seanjc@google.com
Subject: [PATCH] KVM: cleanup DR6/DR7 reserved bits checks
Date: Tue, 2 Feb 2021 12:02:46 -0500 [thread overview]
Message-ID: <20210202170246.89436-1-pbonzini@redhat.com> (raw)
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>
---
arch/x86/kvm/x86.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 97674204bf44..e52e38f8c74d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4414,9 +4414,9 @@ 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));
--
2.26.2
next reply other threads:[~2021-02-02 17:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 17:02 Paolo Bonzini [this message]
2021-02-02 18:27 ` [PATCH] KVM: cleanup DR6/DR7 reserved bits checks Sean Christopherson
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