From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 83A4634BA4B; Tue, 24 Feb 2026 22:34:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771972462; cv=none; b=Q0SNVR+Yhpk4JsmS8Vu5CakK2HKlHGfBhXHwme1kVmiU5F0VivPqKciPwuJGbMZjN2hihIjDlx6bE7iIGkQf7XegB0bAh/+Gh3eFJ2/oQ5qoiXUFFGFbahB0YTlMazKjNK/weu4PXkZ6+V9/uPRq6/JVTzE1b0a7GhbpvKMEBNQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771972462; c=relaxed/simple; bh=30Ml8LFnO+8ooUnf0EPltYHb3swY1mHNC3qB72yZp0s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=keKsSSTQG1ut5t5ivzC8WX//rTNcNpxMYsX6ytiz3cXKapogMDzy6MFNABhjsVQyA/cVT/LlNfsDE5xYw1ogg8urD22SDOFw7V87xiSx9tPNrMzdoeh0ODkhqAO55lVYt1CEf+hdhg+37AKoyZD5+jk7QeNFumSI4entG87cOVE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LoWJBczx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LoWJBczx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0527FC116D0; Tue, 24 Feb 2026 22:34:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771972462; bh=30Ml8LFnO+8ooUnf0EPltYHb3swY1mHNC3qB72yZp0s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LoWJBczxVMfjHKJeKGFv/SnFPu9Q8BHGjUvJ+XxWI0YtBz3m7xvmv7apcIfxyNnvV lkEsAd+OOaXaOH3wozqIoprzmrEG0NH24WLivT3HYBQlGNrWVlfzK1AZxgRScBFfOz nnZCB8LvKRMCPFkreVDRv7/+mRe1mDfcfjgKg1Phpf2JFBEjy3FziCrYljdfpPYDtP uyqXSkKS99RDAXlZpeeIXiZuBFzcTDmFuomKCORN8+MtXCTH2GHqzwpE5GNOXInU4J HNl6hhZd4+r7UgfPbZlGiOy6W8ZDWCEn1deWYEXGcGbD7a7lZWseQnydEPUk7L8rgs l39TgDdoHuy1Q== From: Yosry Ahmed To: Sean Christopherson Cc: Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Yosry Ahmed , stable@vger.kernel.org Subject: [PATCH v6 02/31] KVM: SVM: Switch svm_copy_lbrs() to a macro Date: Tue, 24 Feb 2026 22:33:36 +0000 Message-ID: <20260224223405.3270433-3-yosry@kernel.org> X-Mailer: git-send-email 2.53.0.414.gf7e9f6c205-goog In-Reply-To: <20260224223405.3270433-1-yosry@kernel.org> References: <20260224223405.3270433-1-yosry@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In preparation for using svm_copy_lbrs() with 'struct vmcb_save_area' without a containing 'struct vmcb', and later even 'struct vmcb_save_area_cached', make it a macro. Macros are generally not preferred compared to functions, mainly due to type-safety. However, in this case it seems like having a simple macro copying a few fields is better than copy-pasting the same 5 lines of code in different places. Cc: stable@vger.kernel.org Signed-off-by: Yosry Ahmed --- arch/x86/kvm/svm/nested.c | 8 ++++---- arch/x86/kvm/svm/svm.c | 9 --------- arch/x86/kvm/svm/svm.h | 10 +++++++++- 3 files changed, 13 insertions(+), 14 deletions(-) diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index a31f3be1e16ec..f7d5db0af69ac 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -709,10 +709,10 @@ static void nested_vmcb02_prepare_save(struct vcpu_svm *svm, struct vmcb *vmcb12 * Reserved bits of DEBUGCTL are ignored. Be consistent with * svm_set_msr's definition of reserved bits. */ - svm_copy_lbrs(vmcb02, vmcb12); + svm_copy_lbrs(&vmcb02->save, &vmcb12->save); vmcb02->save.dbgctl &= ~DEBUGCTL_RESERVED_BITS; } else { - svm_copy_lbrs(vmcb02, vmcb01); + svm_copy_lbrs(&vmcb02->save, &vmcb01->save); } vmcb_mark_dirty(vmcb02, VMCB_LBR); svm_update_lbrv(&svm->vcpu); @@ -1234,9 +1234,9 @@ int nested_svm_vmexit(struct vcpu_svm *svm) if (unlikely(guest_cpu_cap_has(vcpu, X86_FEATURE_LBRV) && (svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))) { - svm_copy_lbrs(vmcb12, vmcb02); + svm_copy_lbrs(&vmcb12->save, &vmcb02->save); } else { - svm_copy_lbrs(vmcb01, vmcb02); + svm_copy_lbrs(&vmcb01->save, &vmcb02->save); vmcb_mark_dirty(vmcb01, VMCB_LBR); } diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index a2452b8ec49db..f52e588317fcf 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -841,15 +841,6 @@ static void svm_recalc_msr_intercepts(struct kvm_vcpu *vcpu) */ } -void svm_copy_lbrs(struct vmcb *to_vmcb, struct vmcb *from_vmcb) -{ - to_vmcb->save.dbgctl = from_vmcb->save.dbgctl; - to_vmcb->save.br_from = from_vmcb->save.br_from; - to_vmcb->save.br_to = from_vmcb->save.br_to; - to_vmcb->save.last_excp_from = from_vmcb->save.last_excp_from; - to_vmcb->save.last_excp_to = from_vmcb->save.last_excp_to; -} - static void __svm_enable_lbrv(struct kvm_vcpu *vcpu) { to_svm(vcpu)->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK; diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index ebd7b36b1ceb9..44d767cd1d25a 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -713,8 +713,16 @@ static inline void *svm_vcpu_alloc_msrpm(void) return svm_alloc_permissions_map(MSRPM_SIZE, GFP_KERNEL_ACCOUNT); } +#define svm_copy_lbrs(to, from) \ +do { \ + (to)->dbgctl = (from)->dbgctl; \ + (to)->br_from = (from)->br_from; \ + (to)->br_to = (from)->br_to; \ + (to)->last_excp_from = (from)->last_excp_from; \ + (to)->last_excp_to = (from)->last_excp_to; \ +} while (0) + void svm_vcpu_free_msrpm(void *msrpm); -void svm_copy_lbrs(struct vmcb *to_vmcb, struct vmcb *from_vmcb); void svm_enable_lbrv(struct kvm_vcpu *vcpu); void svm_update_lbrv(struct kvm_vcpu *vcpu); -- 2.53.0.414.gf7e9f6c205-goog