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From:   "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@amd.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "kvm@vger.kernel.org" <kvm@vger.kernel.org>
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        "Grimm, Jon" <Jon.Grimm@amd.com>,
        "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@amd.com>
Subject: [PATCH v3 09/16] kvm: x86: hyperv: Use APICv deactivate request
 interface
Thread-Topic: [PATCH v3 09/16] kvm: x86: hyperv: Use APICv deactivate request
 interface
Thread-Index: AQHVamWV0w32d528XUiZH8DFeQLFEw==
Date:   Fri, 13 Sep 2019 19:01:00 +0000
Message-ID: <1568401242-260374-10-git-send-email-suravee.suthikulpanit@amd.com>
References: <1568401242-260374-1-git-send-email-suravee.suthikulpanit@amd.com>
In-Reply-To: <1568401242-260374-1-git-send-email-suravee.suthikulpanit@amd.com>
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Since disabling APICv has to be done for all vcpus on AMD-based system,
adopt the newly introduced kvm_make_apicv_deactivate_request() interface.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
 arch/x86/kvm/hyperv.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index c10a8b1..1d011b4 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -772,9 +772,17 @@ int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool =
dont_zero_synic_pages)
=20
 	/*
 	 * Hyper-V SynIC auto EOI SINT's are
-	 * not compatible with APICV, so deactivate APICV
+	 * not compatible with APICV, so request
+	 * to deactivate APICV permanently.
+	 *
+	 * Since this requires updating
+	 * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
+	 * also take srcu lock.
 	 */
-	kvm_vcpu_deactivate_apicv(vcpu);
+	vcpu->srcu_idx =3D srcu_read_lock(&vcpu->kvm->srcu);
+	kvm_make_apicv_deactivate_request(vcpu, true);
+	srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+
 	synic->active =3D true;
 	synic->dont_zero_synic_pages =3D dont_zero_synic_pages;
 	return 0;
--=20
1.8.3.1