From: Peter Xu <peterx@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH v2 7/9] KVM: SVM: keep DR6 synchronized with vcpu->arch.dr6
Date: Thu, 7 May 2020 14:22:20 -0400 [thread overview]
Message-ID: <20200507182220.GI228260@xz-x1> (raw)
In-Reply-To: <20200507115011.494562-8-pbonzini@redhat.com>
On Thu, May 07, 2020 at 07:50:09AM -0400, Paolo Bonzini wrote:
> @@ -267,7 +268,7 @@ void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
> svm->vmcb->save.rsp = nested_vmcb->save.rsp;
> svm->vmcb->save.rip = nested_vmcb->save.rip;
> svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
> - svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
> + svm->vcpu.arch.dr6 = nested_vmcb->save.dr6;
The rest looks very sane to me, but here I failed to figure out how arch.dr6
finally applied to save.dr6. I saw it is applied in svm_vcpu_run() in the next
patch, but if that's the case then iiuc this commit may break bisection. Thanks,
--
Peter Xu
next prev parent reply other threads:[~2020-05-07 18:22 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 11:50 [PATCH v2 0/9] KVM_SET_GUEST_DEBUG tests and fixes, DR accessors cleanups Paolo Bonzini
2020-05-07 11:50 ` [PATCH v2 1/9] KVM: X86: Declare KVM_CAP_SET_GUEST_DEBUG properly Paolo Bonzini
2020-05-07 11:50 ` [PATCH v2 2/9] KVM: x86: fix DR6 delivery for various cases of #DB injection Paolo Bonzini
2020-05-07 11:50 ` [PATCH v2 3/9] KVM: X86: Set RTM for DB_VECTOR too for KVM_EXIT_DEBUG Paolo Bonzini
2020-05-07 11:50 ` [PATCH v2 4/9] KVM: X86: Fix single-step with KVM_SET_GUEST_DEBUG Paolo Bonzini
2020-05-07 11:50 ` [PATCH v2 5/9] KVM: selftests: Add KVM_SET_GUEST_DEBUG test Paolo Bonzini
2020-05-07 11:50 ` [PATCH v2 6/9] KVM: nSVM: trap #DB and #BP to userspace if guest debugging is on Paolo Bonzini
2020-05-07 18:22 ` Peter Xu
2020-05-07 11:50 ` [PATCH v2 7/9] KVM: SVM: keep DR6 synchronized with vcpu->arch.dr6 Paolo Bonzini
2020-05-07 18:22 ` Peter Xu [this message]
2020-05-07 22:21 ` Paolo Bonzini
2020-05-07 11:50 ` [PATCH v2 8/9] KVM: x86, SVM: isolate vcpu->arch.dr6 from vmcb->save.dr6 Paolo Bonzini
2020-05-07 19:28 ` Peter Xu
2020-05-07 22:33 ` Paolo Bonzini
2020-05-08 15:32 ` Peter Xu
2020-05-09 13:28 ` Paolo Bonzini
2020-05-11 16:15 ` Peter Xu
2020-05-07 11:50 ` [PATCH 9/9] KVM: VMX: pass correct DR6 for GD userspace exit Paolo Bonzini
2020-05-07 16:18 ` Peter Xu
2020-05-07 16:21 ` Paolo Bonzini
2020-05-07 16:38 ` Peter Xu
2020-05-07 17:42 ` Paolo Bonzini
2020-05-07 18:05 ` Peter Xu
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