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bh=R0436dLk2HndtFQywLtaoVWXMQDmWlHNBJCP/ULvI+0=; b=hAUgKSO+X2aRTCwqNdigjNvpVyR6eJHIZqoHK6oj1Xtp26EdEnHMrHrO7oT7FaqOZPBIZM 7r4n1pl3XUMggf5S05QxQPhFZRBzb7U0M//Fxw5uYFXu6XV0Sow5iXNvaLy0Ay+4897rFF V3CI21H+ZQsWOIj3L9JY1WQa9Bk+fXU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-5-KnVnx-X6O9S35f7Yy4TAag-1; Mon, 26 Apr 2021 06:01:21 -0400 X-MC-Unique: KnVnx-X6O9S35f7Yy4TAag-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6319318B9F09; Mon, 26 Apr 2021 10:01:20 +0000 (UTC) Received: from gondolin.fritz.box (ovpn-113-150.ams2.redhat.com [10.36.113.150]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6BADF6EF50; Mon, 26 Apr 2021 10:01:14 +0000 (UTC) Date: Mon, 26 Apr 2021 12:01:11 +0200 From: Cornelia Huck To: Ilya Leoshkevich Subject: Re: [PATCH v5 0/4] accel/tcg: Make sure that tb->size != 0 after translation Message-ID: <20210426120111.425a943a.cohuck@redhat.com> In-Reply-To: <20210416154939.32404-1-iii@linux.ibm.com> References: <20210416154939.32404-1-iii@linux.ibm.com> Organization: Red Hat GmbH MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=cohuck@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=cohuck@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.219, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Thomas Huth , David Hildenbrand , Richard Henderson , qemu-devel@nongnu.org, Max Filippov , qemu-s390x@nongnu.org, qemu-arm@nongnu.org, Paolo Bonzini , Christian Borntraeger Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, 16 Apr 2021 17:49:35 +0200 Ilya Leoshkevich wrote: > If arch-specific code generates a translation block of size 0, > tb_gen_code() may generate a spurious exception. > > Fix s390x (patch 1), ARM (patch 2) and xtensa (patch 3) and add an > assertion in order to catch such situations earlier (patch 4). > > v1: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02037.html > v1 -> v2: Fix target/s390x instead of trying to tolerate tb->size == 0 > in tb_gen_code(). > > v2: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02101.html > v2 -> v3: Split the common code change into a separate patch, add the > ARM patch in order to fix > https://gitlab.com/cohuck/qemu/-/jobs/1178409450 > > v3: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02332.html > v3 -> v4: Add the xtensa patch in order to fix > https://gitlab.com/cohuck/qemu/-/jobs/1178409540 > > v4: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02592.html > v4 -> v5: Handle thumb: the following C code triggers the assertion: > typedef void (*funcptr)(void); > int main() { funcptr f = (funcptr)0xffff0001; f(); } > > Ilya Leoshkevich (4): > target/s390x: Fix translation exception on illegal instruction > target/arm: Make sure that commpage's tb->size != 0 > target/xtensa: Make sure that tb->size != 0 > accel/tcg: Assert that tb->size != 0 after translation > > accel/tcg/translate-all.c | 1 + > target/arm/translate.c | 2 ++ > target/s390x/translate.c | 16 +++++++++++----- > target/xtensa/translate.c | 3 +++ > 4 files changed, 17 insertions(+), 5 deletions(-) > Thanks, queued to s390-next.