Received-SPF: Pass (protection.outlook.com: domain of amd.com designates
 165.204.84.17 as permitted sender) receiver=protection.outlook.com;
 client-ip=165.204.84.17; helo=SATLEXMB03.amd.com;
From:   Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
To:     <linux-kernel@vger.kernel.org>, <kvm@vger.kernel.org>,
        <x86@kernel.org>
CC:     <pbonzini@redhat.com>, <joro@8bytes.org>, <seanjc@google.com>,
        <mlevitsk@redhat.com>, <tglx@linutronix.de>, <mingo@redhat.com>,
        <bp@alien8.de>, <peterz@infradead.org>, <hpa@zytor.com>,
        <thomas.lendacky@amd.com>, <jon.grimm@amd.com>,
        Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: [PATCH v3 1/3] KVM: SVM: Refactor AVIC hardware setup logic into helper function
Date:   Mon, 13 Dec 2021 05:31:08 -0600
Message-ID: <20211213113110.12143-2-suravee.suthikulpanit@amd.com>
In-Reply-To: <20211213113110.12143-1-suravee.suthikulpanit@amd.com>
References: <20211213113110.12143-1-suravee.suthikulpanit@amd.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Dec 2021 11:32:17.7025
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 8601b0d6-699c-482e-854e-08d9be2c380c
X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com]
X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT040.eop-nam11.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR12MB2647
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

To prepare for upcoming AVIC changes. There is no functional change.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
 arch/x86/kvm/svm/avic.c | 10 ++++++++++
 arch/x86/kvm/svm/svm.c  |  8 +-------
 arch/x86/kvm/svm/svm.h  |  1 +
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 8052d92069e0..63c3801d1829 100644
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -1011,3 +1011,13 @@ void svm_vcpu_unblocking(struct kvm_vcpu *vcpu)
 		kvm_vcpu_update_apicv(vcpu);
 	avic_set_running(vcpu, true);
 }
+
+bool avic_hardware_setup(bool avic)
+{
+	if (!avic || !npt_enabled || !boot_cpu_has(X86_FEATURE_AVIC))
+		return false;
+
+	pr_info("AVIC enabled\n");
+	amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
+	return true;
+}
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 989685098b3e..e59f663ab8cb 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1031,13 +1031,7 @@ static __init int svm_hardware_setup(void)
 			nrips = false;
 	}
 
-	enable_apicv = avic = avic && npt_enabled && boot_cpu_has(X86_FEATURE_AVIC);
-
-	if (enable_apicv) {
-		pr_info("AVIC enabled\n");
-
-		amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
-	}
+	enable_apicv = avic = avic_hardware_setup(avic);
 
 	if (vls) {
 		if (!npt_enabled ||
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 5d30db599e10..3fa975031dc9 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -515,6 +515,7 @@ static inline bool avic_vcpu_is_running(struct kvm_vcpu *vcpu)
 	return (READ_ONCE(*entry) & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);
 }
 
+bool avic_hardware_setup(bool avic);
 int avic_ga_log_notifier(u32 ga_tag);
 void avic_vm_destroy(struct kvm *kvm);
 int avic_vm_init(struct kvm *kvm);
-- 
2.25.1