Message ID | 20230427211013.2994127-1-alxndr@bu.edu |
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[128.197.127.33]) by smtp.gmail.com with ESMTPSA id z2-20020a0c8f02000000b005ef524ea9f1sm5853504qvd.141.2023.04.27.14.10.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Apr 2023 14:10:24 -0700 (PDT) From: Alexander Bulekov <alxndr@bu.edu> To: qemu-devel@nongnu.org Cc: Alexander Bulekov <alxndr@bu.edu>, Stefan Hajnoczi <stefanha@redhat.com>, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= <philmd@linaro.org>, Mauro Matteo Cascella <mcascell@redhat.com>, Peter Xu <peterx@redhat.com>, Jason Wang <jasowang@redhat.com>, David Hildenbrand <david@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>, Thomas Huth <thuth@redhat.com>, Laurent Vivier <lvivier@redhat.com>, Bandan Das <bsd@redhat.com>, "Edgar E . Iglesias" <edgar.iglesias@gmail.com>, Darren Kenny <darren.kenny@oracle.com>, Bin Meng <bin.meng@windriver.com>, Paolo Bonzini <pbonzini@redhat.com>, "Michael S . Tsirkin" <mst@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, =?utf-8?q?Daniel_P_=2E_Berra?= =?utf-8?q?ng=C3=A9?= <berrange@redhat.com>, Eduardo Habkost <eduardo@habkost.net>, Jon Maloy <jmaloy@redhat.com>, Siqi Chen <coc.cyqh@gmail.com>, Michael Tokarev <mjt@tls.msk.ru> Subject: [PATCH v10 0/8] memory: prevent dma-reentracy issues Date: Thu, 27 Apr 2023 17:10:05 -0400 Message-Id: <20230427211013.2994127-1-alxndr@bu.edu> X-Mailer: git-send-email 2.39.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CES-GSUITE_AUTH: bf3aNvsZpxl8 Received-SPF: pass client-ip=216.71.137.79; envelope-from=alxndr@bu.edu; helo=esa6.hc2706-39.iphmx.com X-Spam_score_int: -7 X-Spam_score: -0.8 X-Spam_bar: / X-Spam_report: (-0.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.266, HK_RANDOM_FROM=0.999, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: <qemu-devel.nongnu.org> List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>, <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe> List-Archive: <https://lists.nongnu.org/archive/html/qemu-devel> List-Post: <mailto:qemu-devel@nongnu.org> List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help> List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>, <mailto:qemu-devel-request@nongnu.org?subject=subscribe> Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org |
Series |
memory: prevent dma-reentracy issues
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28.04.2023 00:10, Alexander Bulekov wrote: .. > These patches aim to solve two types of DMA-reentrancy issues: > > 1.) mmio -> dma -> mmio case > To solve this, we track whether the device is engaged in io by > checking/setting a reentrancy-guard within APIs used for MMIO access. > > 2.) bh -> dma write -> mmio case > This case is trickier, since we dont have a generic way to associate a > bh with the underlying Device/DeviceState. Thus, this version allows a > device to associate a reentrancy-guard with a bh, when creating it. > (Instead of calling qemu_bh_new, you call qemu_bh_new_guarded) Should this patchset (with any follow-up fixes) go to 8.0-stable? Thanks, /mjt