From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:52840 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751748AbdHGUcR (ORCPT ); Mon, 7 Aug 2017 16:32:17 -0400 Subject: Patch "KVM: arm/arm64: Handle hva aging while destroying the vm" has been added to the 4.12-stable tree To: Suzuki.Poulose@arm.com, agraf@suse.de, cdall@linaro.org, gregkh@linuxfoundation.org, marc.zyngier@arm.com, suzuki.poulose@arm.com Cc: , From: Date: Mon, 07 Aug 2017 13:32:12 -0700 Message-ID: <150213793221797@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled KVM: arm/arm64: Handle hva aging while destroying the vm to the 4.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: kvm-arm-arm64-handle-hva-aging-while-destroying-the-vm.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 7e5a672289c9754d07e1c3b33649786d3d70f5e4 Mon Sep 17 00:00:00 2001 From: Suzuki K Poulose Date: Wed, 5 Jul 2017 09:57:00 +0100 Subject: KVM: arm/arm64: Handle hva aging while destroying the vm From: Suzuki K Poulose commit 7e5a672289c9754d07e1c3b33649786d3d70f5e4 upstream. The mmu_notifier_release() callback of KVM triggers cleaning up the stage2 page table on kvm-arm. However there could be other notifier callbacks in parallel with the mmu_notifier_release(), which could cause the call backs ending up in an empty stage2 page table. Make sure we check it for all the notifier callbacks. Fixes: commit 293f29363 ("kvm-arm: Unmap shadow pagetables properly") Reported-by: Alex Graf Reviewed-by: Christoffer Dall Signed-off-by: Suzuki K Poulose Signed-off-by: Marc Zyngier Signed-off-by: Greg Kroah-Hartman --- virt/kvm/arm/mmu.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -1665,12 +1665,16 @@ static int kvm_test_age_hva_handler(stru int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end) { + if (!kvm->arch.pgd) + return 0; trace_kvm_age_hva(start, end); return handle_hva_to_gpa(kvm, start, end, kvm_age_hva_handler, NULL); } int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) { + if (!kvm->arch.pgd) + return 0; trace_kvm_test_age_hva(hva); return handle_hva_to_gpa(kvm, hva, hva, kvm_test_age_hva_handler, NULL); } Patches currently in stable-queue which might be from Suzuki.Poulose@arm.com are queue-4.12/kvm-arm-arm64-handle-hva-aging-while-destroying-the-vm.patch