From patchwork Wed Apr 9 00:08:35 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Kisel X-Patchwork-Id: 14043855 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3513EC36010 for ; Wed, 9 Apr 2025 00:19:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=8ek7c/V4tEPRnWDg9ne0X3d57G2QR4Kt93BNCHQvtsg=; b=WLRf/WP4X00iK9QsJnAo/uuyaM q4Ry4+Ud6Hf/6VDS+jKzc8lZF/BH0+HENWYY9aWhgzHQUg8xmI02wT3l09ky8aWw5KChW3/+cWVyH +I529S24X7VUZU64QaIX3mBhfGl1pD/avNHcLe99jvByCtTmJywvBLiAOZjKrrE48BiWQg7iApNuz xjOP0R1njJaRiy9+mJ/plD1ZfygUWaj6StwwnbG7CN6dsD+LF33h/8sTlvWs3katkdmj5FV4jSTe7 3ysjcn0dDC8spkHcQAu7u2lxX0OWmWWfWFzjdp8jLasBhlXTQeLEWHaUkgEBSJdUE8pJAAhuHvqJr URipw9PQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u2JA9-00000005lSl-3Nhh; Wed, 09 Apr 2025 00:19:29 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u2Izi-00000005kDp-15sM for linux-arm-kernel@lists.infradead.org; Wed, 09 Apr 2025 00:08:44 +0000 Received: from romank-3650.corp.microsoft.com (unknown [131.107.160.188]) by linux.microsoft.com (Postfix) with ESMTPSA id 06D292113E9F; Tue, 8 Apr 2025 17:08:40 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 06D292113E9F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1744157320; bh=8ek7c/V4tEPRnWDg9ne0X3d57G2QR4Kt93BNCHQvtsg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Of+UYZp2I4weN3I81NEdoIr6gHMQsX3CjbNKnmmILmhtmUf4OHR93sp3AhZBtJ2pd p1p+jiVB2MOUPwfNzvia/zk8pDwYavj+M98l9VP+2iQjxvMKZGei/TzEdRpNb6jH7A QZU2sGxZRVpouYt/yXPi/sDcuyn3Lg+7XMI11FP0= From: Roman Kisel To: aleksander.lobakin@intel.com, andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de, catalin.marinas@arm.com, corbet@lwn.net, dakr@kernel.org, dan.j.williams@intel.com, dave.hansen@linux.intel.com, decui@microsoft.com, gregkh@linuxfoundation.org, haiyangz@microsoft.com, hch@lst.de, hpa@zytor.com, James.Bottomley@HansenPartnership.com, Jonathan.Cameron@huawei.com, kys@microsoft.com, leon@kernel.org, lukas@wunner.de, luto@kernel.org, m.szyprowski@samsung.com, martin.petersen@oracle.com, mingo@redhat.com, peterz@infradead.org, quic_zijuhu@quicinc.com, robin.murphy@arm.com, tglx@linutronix.de, wei.liu@kernel.org, will@kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, x86@kernel.org Cc: apais@microsoft.com, benhill@microsoft.com, bperkins@microsoft.com, sunilmut@microsoft.com Subject: [PATCH hyperv-next 6/6] drivers: SCSI: Do not bounce-bufffer for the confidential VMBus Date: Tue, 8 Apr 2025 17:08:35 -0700 Message-ID: <20250409000835.285105-7-romank@linux.microsoft.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250409000835.285105-1-romank@linux.microsoft.com> References: <20250409000835.285105-1-romank@linux.microsoft.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250408_170842_327548_6198C49B X-CRM114-Status: UNSURE ( 9.06 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The device bit that indicates that the device is capable of I/O with private pages lets avoid excessive copying in the Hyper-V SCSI driver. Set that bit equal to the confidential external memory one to not bounce buffer Signed-off-by: Roman Kisel --- drivers/scsi/storvsc_drv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index a8614e54544e..f647f8fc2f8f 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -686,6 +686,8 @@ static void handle_sc_creation(struct vmbus_channel *new_sc) struct vmstorage_channel_properties props; int ret; + dev->use_priv_pages_for_io = new_sc->confidential_external_memory; + stor_device = get_out_stor_device(device); if (!stor_device) return;