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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>
Cc: "pbonzini@redhat.com" <pbonzini@redhat.com>,
	"rkrcmar@redhat.com" <rkrcmar@redhat.com>,
	"joro@8bytes.org" <joro@8bytes.org>,
	"vkuznets@redhat.com" <vkuznets@redhat.com>,
	"graf@amazon.com" <graf@amazon.com>,
	"jschoenh@amazon.de" <jschoenh@amazon.de>,
	"karahmed@amazon.de" <karahmed@amazon.de>,
	"rimasluk@amazon.com" <rimasluk@amazon.com>,
	"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
Date: Fri, 13 Sep 2019 19:01:00 +0000
Message-ID: <1568401242-260374-10-git-send-email-suravee.suthikulpanit@amd.com> (raw)
In-Reply-To: <1568401242-260374-1-git-send-email-suravee.suthikulpanit@amd.com>

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)
 
 	/*
 	 * 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 = srcu_read_lock(&vcpu->kvm->srcu);
+	kvm_make_apicv_deactivate_request(vcpu, true);
+	srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+
 	synic->active = true;
 	synic->dont_zero_synic_pages = dont_zero_synic_pages;
 	return 0;
-- 
1.8.3.1


  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-13 19:00 [PATCH v3 00/16] kvm: x86: Support AMD SVM AVIC w/ in-kernel irqchip mode Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 01/16] kvm: x86: Modify kvm_x86_ops.get_enable_apicv() to use struct kvm parameter Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 02/16] kvm: x86: Introduce KVM APICv state Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 03/16] kvm: lapic: Introduce APICv update helper function Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 04/16] kvm: x86: Add support for activate/de-activate APICv at runtime Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 05/16] kvm: x86: Add APICv activate/deactivate request trace points Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 06/16] kvm: x86: svm: Add support to activate/deactivate posted interrupts Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 07/16] svm: Add support for setup/destroy virutal APIC backing page for AVIC Suthikulpanit, Suravee
2019-09-13 19:00 ` [PATCH v3 08/16] svm: Add support for activate/deactivate AVIC at runtime Suthikulpanit, Suravee
2019-09-13 19:01 ` Suthikulpanit, Suravee [this message]
2019-09-13 19:01 ` [PATCH v3 10/16] svm: Disable AVIC when launching guest with SVM support Suthikulpanit, Suravee
2019-09-13 19:01 ` [PATCH v3 11/16] svm: Temporary deactivate AVIC during ExtINT handling Suthikulpanit, Suravee
2019-09-13 19:01 ` [PATCH v3 12/16] kvm: x86: Introduce struct kvm_x86_ops.apicv_eoi_accelerate Suthikulpanit, Suravee
2019-09-13 19:01 ` [PATCH v3 13/16] kvm: lapic: Clean up APIC predefined macros Suthikulpanit, Suravee
2019-09-13 19:01 ` [PATCH v3 14/16] kvm: ioapic: Refactor kvm_ioapic_update_eoi() Suthikulpanit, Suravee
2019-09-13 19:01 ` [PATCH v3 15/16] kvm: x86: ioapic: Lazy update IOAPIC EOI Suthikulpanit, Suravee
2019-09-13 19:01 ` [PATCH v3 16/16] svm: Allow AVIC with in-kernel irqchip mode Suthikulpanit, Suravee

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