From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4270C433EF for ; Tue, 5 Oct 2021 09:02:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE8CD61037 for ; Tue, 5 Oct 2021 09:02:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233277AbhJEJD5 (ORCPT ); Tue, 5 Oct 2021 05:03:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232834AbhJEJDy (ORCPT ); Tue, 5 Oct 2021 05:03:54 -0400 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3DF87C061745 for ; Tue, 5 Oct 2021 02:02:03 -0700 (PDT) Received: by mail-qt1-x849.google.com with SMTP id z10-20020ac83e0a000000b002a732692afaso7111752qtf.2 for ; Tue, 05 Oct 2021 02:02:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:message-id:mime-version:subject:from:to:cc; bh=YjTsD/0+blx8dzSzzvYPEmIwxWymL2rSsPmT9WrblMQ=; b=Oni8vTpzdoAguLL9g/0bTNlxG6eqPKNXR7hlH2QVhmPG/MSICPVMmjIkLRMVoFZsak qu7HwsUXwfWdDGja/pJ6rr0gubuHFEcEDOhT1sEUrKFT0YEeebrwEK01Eukybn0GEJ7t Un/N37PDtmLGAevXkQx9RIeDEMjoS/Rb6BKBU4YVPFU/ad/YLq/KXkFDoCP+IObdA6h4 kfqOcbJ1Axh78XlOffdWVzqd2+p5AV42WHmazyMlMQLbiNF3gOWDEbO9ZaI5Y5tsmZct qU/XyCEcLAj+ar44gtcChNSpXGDU2wR5b0HWyYCQDMIYY+/le0bK+7smskmSqoCjAFra 8DDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=YjTsD/0+blx8dzSzzvYPEmIwxWymL2rSsPmT9WrblMQ=; b=7RYIoHkOn1XFuL1THVM4TWuOWBctZ15sMcA5zxo6jo/qt3+VheppjmDu0HoK1V75Lh sgZ6S+Y5f7DXfD1UP9uQP25uVtJi3VDUbjppK1aRPkIC/nOBO9JUeZKjeSfaYRO8J2mE Kq9s3crnjLsfVOF3HDRwdI7iWm4kYTyfRSLDsvzMYsVPTklsMu/yvaz0dh3fwmIK0Pzo BDPtlvErSCy06ZwO9CQyqujyh6xvoIu6YZb5fghlDuhICxvv81iyCYpcvyNn5Or3RCf7 Cg2iMcF7bjspzZpZt0XlduuAQtHhG+aY8UAOZ4uOF8PTWD5C0W1ISjSbaRAHQsOF5gkx /7rg== X-Gm-Message-State: AOAM533xFcXs8Ms/QctRec2NI8AxjlmEg2L5mYOjPqgofv5VqHVQ/YU2 de9yGsHDqLEplkgxau2xZ85Z647pJtjj X-Google-Smtp-Source: ABdhPJzdJwotAoaBB3EtyGIAZNxFrytEsAJXsOE9DPlOSjQixLdLb9VSyUZ6rGK2FOH7gAKnzLzBgNvtbGus X-Received: from luke.lon.corp.google.com ([2a00:79e0:d:210:5700:9128:3106:b389]) (user=qperret job=sendgmr) by 2002:ad4:4629:: with SMTP id x9mr26087544qvv.58.1633424522389; Tue, 05 Oct 2021 02:02:02 -0700 (PDT) Date: Tue, 5 Oct 2021 10:01:37 +0100 Message-Id: <20211005090155.734578-1-qperret@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.33.0.800.g4c38ced690-goog Subject: [PATCH 0/2] A couple of EL2 refcounts fixes From: Quentin Perret To: Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Catalin Marinas , Will Deacon , Quentin Perret , Fuad Tabba , David Brazdil , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org Cc: kernel-team@android.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, This addresses a couple of issues Will has found with the refcounting of page-tables at EL2. Patch 01 fixes a nasty bug, and probably wants to go in -stable. Patch 02 fixes a small inconsistency which made it harder to find refcount-related bugs at EL2. Feedback welcome ! Thanks, Quentin Quentin Perret (2): KVM: arm64: Fix host stage-2 PGD refcount KVM: arm64: Report corrupted refcount at EL2 arch/arm64/kvm/hyp/include/nvhe/gfp.h | 1 + arch/arm64/kvm/hyp/nvhe/mem_protect.c | 6 +++++- arch/arm64/kvm/hyp/nvhe/page_alloc.c | 15 +++++++++++++++ 3 files changed, 21 insertions(+), 1 deletion(-) -- 2.33.0.800.g4c38ced690-goog