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[37.145.186.126]) by smtp.gmail.com with ESMTPSA id q27sm136133lfd.261.2020.10.19.13.20.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Oct 2020 13:20:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:subject:from:to:cc:date:user-agent:mime-version :content-transfer-encoding; bh=7urB7f92nHfRlxyFk7GnYTz1GZBdxJ9ZfAfPv48p1XY=; b=JjyzqLlzXo6whVwUzg+DYEdOuI0XUsjLUXFt6eDrM0ZnEegLRzobFFHs16LxuoKr7S 2mGRyZzDP2n7yJdCEmhBFpijPecWyJMQaUIL/o6PcjApDi7ROXNQ+ag7spEOo754QKpf wuxY1MzJjk2OGRJA66bXiRjYkblq5/s8C4HGpMQG/GyBHwkhCm3ZjlEt8UukrSeGHnSG AKlYe9trRxeX+gWH4pSta8YEqNPgE1HWnvUl6tUdIGCgqXZzRzi1mUYFlrV1NLEN7DUI S1GJu33o6vKZAPp8XFGepjcDWLWde2vTaHgUkjSgKh/5w+26B/oGX5begEs2+BYl3YOv pQ4A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:cc:date:user-agent :mime-version:content-transfer-encoding; bh=7urB7f92nHfRlxyFk7GnYTz1GZBdxJ9ZfAfPv48p1XY=; b=ABjwgyw8cjlhuNl/N1jXzMdCjMlGFbOUcXmiqxbGzOC1YX+/LpTwEtxCE9cFEIoWi3 FwxVp06FRfz/k1zwYM4dhKU9ybu4QSqjpw0Ds7uqrKfdY1j+4YJJcQvtetOGY2qy3U2n uNGlKr7B5oC6b2jF1vWJPvRZTIIfZztAl8Ob2pthYf1pY1I+gKjkduYaWDqSPd+uKnQk hMnksc9q1JFnSyE5lrF4zkROSBdmJ7OhX8F7U0iySce/jZ8Tb7W3nvraQciYJC/Gz2fo sQrh2sxl5eOZa99+ekuFzJKAp2w5qmXnX687clQWlySbJrNRfLbBn7O6XizovGkIe9xC tcwg== X-Gm-Message-State: AOAM530zMxbQJTlC+NeIL8FJDW5p7hGeRK6/Je3e3tzrtiX7W1VU/ZRo cmlmhGXrkyECaJvH+nlOZk/qLXyq4lD5yg== X-Google-Smtp-Source: ABdhPJzcmWCt9DUCufMUe2kPAH7hx3Ig5bGih4TipveCP9KTntgMrpP657GS6vIgc8WuvMJteXXv4A== X-Received: by 2002:a2e:88cb:: with SMTP id a11mr725738ljk.304.1603138828678; Mon, 19 Oct 2020 13:20:28 -0700 (PDT) Message-ID: Subject: [PATCH v2] softmmu/memory: fix memory_region_ioeventfd_equal() From: Elena Afanasova To: qemu-devel@nongnu.org Date: Mon, 19 Oct 2020 13:20:13 -0700 User-Agent: Evolution 3.36.4-0ubuntu1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::241; envelope-from=eafanasova@gmail.com; helo=mail-lj1-x241.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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: pbonzini@redhat.com, stefanha@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) Content-Type: text/plain; charset="utf-8" Eventfd can be registered with a zero length when fast_mmio is true. Handle this case properly when dispatching through QEMU. Signed-off-by: Elena Afanasova --- softmmu/memory.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/softmmu/memory.c b/softmmu/memory.c index 403ff3abc9..4b5775ae5b 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -205,8 +205,15 @@ static bool memory_region_ioeventfd_before(MemoryRegio= nIoeventfd *a, static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd *a, MemoryRegionIoeventfd *b) { - return !memory_region_ioeventfd_before(a, b) - && !memory_region_ioeventfd_before(b, a); + if (int128_eq(a->addr.start, b->addr.start) && + (!int128_nz(a->addr.size) || !int128_nz(b->addr.size) || + (int128_eq(a->addr.size, b->addr.size) && + (a->match_data =3D=3D b->match_data) && + ((a->match_data && (a->data =3D=3D b->data)) || !a->match_data) = && + (a->e =3D=3D b->e)))) + return true; + + return false; } =20 /* Range of memory in the global map. Addresses are absolute. */ --=20 2.25.1