From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0782DC43461 for ; Mon, 31 Aug 2020 15:30:59 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CE3A8207EA for ; Mon, 31 Aug 2020 15:30:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Q9hLf9Qs" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CE3A8207EA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kCllW-00064T-W5; Mon, 31 Aug 2020 15:30:38 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kCllW-00064O-8W for xen-devel@lists.xenproject.org; Mon, 31 Aug 2020 15:30:38 +0000 X-Inumbo-ID: 85e88fd8-3f48-4238-9cc5-bbbc048097fe Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 85e88fd8-3f48-4238-9cc5-bbbc048097fe; Mon, 31 Aug 2020 15:30:37 +0000 (UTC) Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 69372214D8; Mon, 31 Aug 2020 15:30:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598887836; bh=UqqMPAtWDqzA6uUdK9GV+TVqxsDEdKr1IAB3nfSBPuo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q9hLf9QsynLtpUQttfgx4RwjoCIhoqOHFiIEucCON7lXCaoldpFKfE0v4CQa+sjWO J/SRnl1XEf1yqUxCsOAie84w6uAS0iHDLgtlNCKXlhb9inigCbDRtxjl0DWAxh6bi0 OpJA/xO5raSAWiiPfDGk+u5vLN0IWkkVhwJIZcOE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Simon Leiner , Stefano Stabellini , Juergen Gross , Sasha Levin , xen-devel@lists.xenproject.org Subject: [PATCH AUTOSEL 5.8 41/42] xen/xenbus: Fix granting of vmalloc'd memory Date: Mon, 31 Aug 2020 11:29:33 -0400 Message-Id: <20200831152934.1023912-41-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200831152934.1023912-1-sashal@kernel.org> References: <20200831152934.1023912-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" From: Simon Leiner [ Upstream commit d742db70033c745e410523e00522ee0cfe2aa416 ] On some architectures (like ARM), virt_to_gfn cannot be used for vmalloc'd memory because of its reliance on virt_to_phys. This patch introduces a check for vmalloc'd addresses and obtains the PFN using vmalloc_to_pfn in that case. Signed-off-by: Simon Leiner Reviewed-by: Stefano Stabellini Link: https://lore.kernel.org/r/20200825093153.35500-1-simon@leiner.me Signed-off-by: Juergen Gross Signed-off-by: Sasha Levin --- drivers/xen/xenbus/xenbus_client.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c index 786fbb7d8be06..907bcbb93afbf 100644 --- a/drivers/xen/xenbus/xenbus_client.c +++ b/drivers/xen/xenbus/xenbus_client.c @@ -379,8 +379,14 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr, int i, j; for (i = 0; i < nr_pages; i++) { - err = gnttab_grant_foreign_access(dev->otherend_id, - virt_to_gfn(vaddr), 0); + unsigned long gfn; + + if (is_vmalloc_addr(vaddr)) + gfn = pfn_to_gfn(vmalloc_to_pfn(vaddr)); + else + gfn = virt_to_gfn(vaddr); + + err = gnttab_grant_foreign_access(dev->otherend_id, gfn, 0); if (err < 0) { xenbus_dev_fatal(dev, err, "granting access to ring page"); -- 2.25.1