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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CEA5EC4332F for ; Mon, 7 Nov 2022 17:19:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232740AbiKGRTB (ORCPT ); Mon, 7 Nov 2022 12:19:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34336 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232682AbiKGRS7 (ORCPT ); Mon, 7 Nov 2022 12:18:59 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 964AC2229D for ; Mon, 7 Nov 2022 09:18:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1667841482; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=eyB5XQfj8X8XBN5oEWy4ddR/NP8TDNQi/nS/qaNxnEg=; b=AdFkNEnIEk4TsqY+hktc3GooKu4KcFSnaZdG4L5wsAQbTeshwaMOwE7keYejnhPMlQM/SR SCi6Cw8g6E4YvXrwYRUwyrqPSUTfF24SiFEjWuZypoLcpgSbnCYRIh6C7QIWRjFJtnaS3p Hlh+MpfbCdW9BC/HHLMh5JnX+ZwXrUg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-275-2W73CXHrMeGqDp9ENr3LVg-1; Mon, 07 Nov 2022 12:17:52 -0500 X-MC-Unique: 2W73CXHrMeGqDp9ENr3LVg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 52D8B85A5B6; Mon, 7 Nov 2022 17:17:51 +0000 (UTC) Received: from localhost (unknown [10.39.193.202]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 085DD1121314; Mon, 7 Nov 2022 17:17:50 +0000 (UTC) From: Cornelia Huck To: Peter Collingbourne , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Cc: Peter Collingbourne , Catalin Marinas , Will Deacon , Marc Zyngier , Evgenii Stepanov , kvm@vger.kernel.org, Steven Price , Vincenzo Frascino Subject: Re: [PATCH v5 6/8] KVM: arm64: unify the tests for VMAs in memslots when MTE is enabled In-Reply-To: <20221104011041.290951-7-pcc@google.com> Organization: Red Hat GmbH References: <20221104011041.290951-1-pcc@google.com> <20221104011041.290951-7-pcc@google.com> User-Agent: Notmuch/0.37 (https://notmuchmail.org) Date: Mon, 07 Nov 2022 18:17:48 +0100 Message-ID: <87fseu3cqr.fsf@redhat.com> MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Thu, Nov 03 2022, Peter Collingbourne wrote: > Previously we allowed creating a memslot containing a private mapping that > was not VM_MTE_ALLOWED, but would later reject KVM_RUN with -EFAULT. Now > we reject the memory region at memslot creation time. > > Since this is a minor tweak to the ABI (a VMM that created one of > these memslots would fail later anyway), no VMM to my knowledge has > MTE support yet, and the hardware with the necessary features is not > generally available, we can probably make this ABI change at this point. > > Signed-off-by: Peter Collingbourne > Reviewed-by: Catalin Marinas > Reviewed-by: Steven Price > --- > arch/arm64/kvm/mmu.c | 25 ++++++++++++++++--------- > 1 file changed, 16 insertions(+), 9 deletions(-) Reviewed-by: Cornelia Huck