From nobody Mon Feb 9 05:01:34 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1626155293554655.100338300056; Mon, 12 Jul 2021 22:48:13 -0700 (PDT) Received: from localhost ([::1]:54106 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m3BHA-0001hZ-0b for importer@patchew.org; Tue, 13 Jul 2021 01:48:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42408) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m3BDF-00009C-5n; Tue, 13 Jul 2021 01:44:09 -0400 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:42233) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m3BDC-0002lD-Qy; Tue, 13 Jul 2021 01:44:08 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id C0F955C008E; Tue, 13 Jul 2021 01:44:03 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Tue, 13 Jul 2021 01:44:03 -0400 Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 13 Jul 2021 01:44:01 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=irrelevant.dk; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; s=fm3; bh=rEjNvyRaEr7PJcFfbAVRq/JGo/ Fns0xXcb5py0LYvt8=; b=iH25ZieYfDCtR1TEq1J6YaUrcczYXAFDrUmBc4VXq+ dyt+C/8EmTFbR/NLbAZZX5+URBJpPgSXigRd3yxfm94ArsaRgDiMZm0UySQ3t7GQ ZMYPU9U8/vRxiwdiBYgrTo1PPGQpISXfnxXisps0RYzH7d+K60oZn77eDCcc+fei FTsGLNQZR0xVwqnQMk0w/EN0nORWSJN251P95OQVw8em9xfZw9v0l/a9HxUCsDkm uILgs+1GVPKUneacFAzXWNSHyb7xUiTzVDPekv07AVs53X4qAnZg3vPBGQ/EWdpb uQmILCberwLkBJbQM1cXK0nSVJGD1cRcI/sU/ZAteFMg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :message-id:mime-version:subject:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=rEjNvyRaEr7PJcFfb AVRq/JGo/Fns0xXcb5py0LYvt8=; b=iZL7vr8phZy8ljSj1Y2Sr0PN110wnentn aTWmfNH5mPrgJ2cMnDcFlbcaSKFeOtTo5z0EkYn1KhKvlFJnQ/JuV/4BkmQwxghz FijXiUG3A2R4XidAvOBnCSvFMKm8XWLcYhMsnmj4vKNNN+UK2FBZNeERM0j5aYmo oSCEeVZ1Onca+drRQ+PlKkMx6aZ3jbPSKvt1fILsHtmsHQEvWGKmgoJqnSazVjCd KR99dph8+Zc9C25HilVFmZmmx1nMmkVt3JE4xYovVuuwuMnnDDhkWj07de+YZh7I ejTf6cGwYUgLL7s4tbZsucBXXnrq0D5w05rKL9gPf/RUNmSe4NDuw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrudeggdeihecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhvffufffkofgggfestdekredtredttdenucfhrhhomhepmfhlrghushculfgv nhhsvghnuceoihhtshesihhrrhgvlhgvvhgrnhhtrdgukheqnecuggftrfgrthhtvghrnh epfeevledvieekudeuffetgeegfeehvdffffejueeuleduhedvgeejveejhfdtteehnecu vehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepihhtshesih hrrhgvlhgvvhgrnhhtrdgukh X-ME-Proxy: From: Klaus Jensen To: qemu-devel@nongnu.org Subject: [PATCH] hw/nvme: fix mmio read Date: Tue, 13 Jul 2021 07:43:59 +0200 Message-Id: <20210713054359.831878-1-its@irrelevant.dk> X-Mailer: git-send-email 2.32.0 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=66.111.4.27; envelope-from=its@irrelevant.dk; helo=out3-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-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 , qemu-block@nongnu.org, Klaus Jensen , Gollu Appalanaidu , Keith Busch , Klaus Jensen Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1626155295396100001 Content-Type: text/plain; charset="utf-8" From: Klaus Jensen The new PMR test unearthed a long-standing issue with MMIO reads on big-endian hosts. Fix by using the ldn_he_p helper instead of memcpy. Cc: Gollu Appalanaidu Reported-by: Peter Maydell Signed-off-by: Klaus Jensen Reviewed-by: Gollu Appalanaidu --- hw/nvme/ctrl.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c index 2f0524e12a36..dd81c3b19c7e 100644 --- a/hw/nvme/ctrl.c +++ b/hw/nvme/ctrl.c @@ -5951,7 +5951,6 @@ static uint64_t nvme_mmio_read(void *opaque, hwaddr a= ddr, unsigned size) { NvmeCtrl *n =3D (NvmeCtrl *)opaque; uint8_t *ptr =3D (uint8_t *)&n->bar; - uint64_t val =3D 0; =20 trace_pci_nvme_mmio_read(addr, size); =20 @@ -5977,14 +5976,15 @@ static uint64_t nvme_mmio_read(void *opaque, hwaddr= addr, unsigned size) (NVME_PMRCAP_PMRWBM(n->bar.pmrcap) & 0x02)) { memory_region_msync(&n->pmr.dev->mr, 0, n->pmr.dev->size); } - memcpy(&val, ptr + addr, size); - } else { - NVME_GUEST_ERR(pci_nvme_ub_mmiord_invalid_ofs, - "MMIO read beyond last register," - " offset=3D0x%"PRIx64", returning 0", addr); + + return ldn_he_p(ptr + addr, size); } =20 - return val; + NVME_GUEST_ERR(pci_nvme_ub_mmiord_invalid_ofs, + "MMIO read beyond last register," + " offset=3D0x%"PRIx64", returning 0", addr); + + return 0; } =20 static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val) --=20 2.32.0