From nobody Wed Dec 17 13:56:50 2025 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CCF0D1474BE for ; Tue, 9 Jul 2024 23:49:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720568960; cv=none; b=KPkfyg2xu1RrEoi8cLIJzbaRvU4EpDaANv/5wmm0z8ypfVhIZcVBoQ5bG/8HgqOY8uk5a/QFOE8VYuQ+tceupgEZ6q6M3I8WH3O/xWudBUd51/5nCuQA6EUJf+F2WgNYnVpVSvjLgfnE92vjTxuqVlmRCq33LGWHjLjLBhE0eM8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720568960; c=relaxed/simple; bh=yGKs/GKCL3nl4YxWXN4A6FvutpRKPliWYBfVVipIw1w=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=S1Mca4jpV5K/DV7erVmjc72UidHbLXo6YzxtknXVXsq5O6A5r2I9AvFjqthSHFgwTIH9plwidnjaaQ9CBLFnlX+Bb1ZE/N2Xulwu2hbZBxAdMpGAGpJYikyxCpPZz+l8uPas4hM8p0fL1NUWoE9F57DCQK2YDf/PwCvQl3lEJLY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--pandoh.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=mdiqsbRs; arc=none smtp.client-ip=209.85.128.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--pandoh.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="mdiqsbRs" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-64f4b849b7cso98323647b3.2 for ; Tue, 09 Jul 2024 16:49:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1720568958; x=1721173758; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=7mDbytgqOLMqMz+EYXhiJVnxk2hfmw4URx/DKSaIyt0=; b=mdiqsbRstXoVR7obHo0tIaNmtBTA/4hTuEyzS3SxKpe4PgzNlWZg5jfZk+t1BLYKUE LqIGf7qBNT9sH2waTkJsOrfudiwUKhUBVmjxuXjmSgr4WSQ8V3rswyedOXImWl4UFJbD vM0nJOzqUa0oFCuQnhGqnKOD/oLz/OwYr+kS7Xzlfi9ELVxLU8JIEVkZeTy8y7JJ7QKZ 7o0qKwe7Zx3hCw9OgEvlUP7q1NVeHXX+SNQTlIBDK0mpexC/uTgoV/Whgc96GBBXZFgE 5MulyUuphNIBczBOaBJvzT2wV492XCQO8BnTXB/NNVHRxMNwxC94pqj3Xab1rv3silsB ADFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720568958; x=1721173758; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=7mDbytgqOLMqMz+EYXhiJVnxk2hfmw4URx/DKSaIyt0=; b=KkzrfCCoLkelQEPVFeTDkscvrKtRB+5iOllC532sfmTuUCHX1UEsa8hujsi/+nUfeO HYOjXclX/b5cgzdhiFw6rbLGXbrOuPB2FWLoD024qQka5M7f2rNI2aJmEvsOm0ATpG6Q 86kUUWLLPtUKfgNZ3sDDclqBAQxy2HkDZv50u4POZD8PC2WqRrM0XHtdAAl2eg1otcw7 QCSK2FG9ZjPnuOa++qSZEcOQz2p31PLRtyipZsgipY6+vIJA4dJYb3BV/ftlvLgwUNcr o+CRx/vd0SaC22pdIfSVO6lOCCJMNDxNiyXd3pQEu1dmQBQZkDEdegwmQBA6HvDPZu9o NxMw== X-Forwarded-Encrypted: i=1; AJvYcCUMgXLjc7EYZj9FFAj6t/ehVG0h6oRld5P24UNkzF00iSplPUrl70AOu+Xk1g2wv3lHU2x00YZtCzp4Jr9g2L7On7omiu+rmlMc5gde X-Gm-Message-State: AOJu0YxRZ010+QiqiO3vtXunWNd1KrSLloNMB/TDinolAA9XG/gqP5sG al1pgPTNOSDl9rtHB7jraSuWQaH668AGJdCznyq93amF8qMt/3bCLo4Q42PhkYtnMNDq6F4MTgc Row== X-Google-Smtp-Source: AGHT+IG8cNE725G12Kfa72RNPLrZxQ2HsAiG8z2ywoOGl1i6XzVN390kI4TOHDz7MkFev5cilMkjvotl9kI= X-Received: from pandoh.svl.corp.google.com ([2620:15c:2a3:200:dc7b:3f1c:f4a8:f387]) (user=pandoh job=sendgmr) by 2002:a05:6902:161a:b0:e02:6dcf:e9ab with SMTP id 3f1490d57ef6-e041b0688b2mr7939276.6.1720568957867; Tue, 09 Jul 2024 16:49:17 -0700 (PDT) Date: Tue, 9 Jul 2024 16:49:13 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.45.2.803.g4e1b14247a-goog Message-ID: <20240709234913.2749386-1-pandoh@google.com> Subject: [PATCH] iommu/vt-d: Fix identity map bounds in si_domain_init() From: Jon Pan-Doh To: David Woodhouse , Lu Baolu , Kevin Tian Cc: Joerg Roedel , Will Deacon , Robin Murphy , "H. Peter Anvin" , Tejun Heo , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Jon Pan-Doh , Sudheer Dantuluri , Gary Zibrat Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Intel IOMMU operates on inclusive bounds (both generally aas well as iommu_domain_identity_map()). Meanwhile, for_each_mem_pfn_range() uses exclusive bounds for end_pfn. This creates an off-by-one error when switching between the two. Fixes: 5dfe8660a3d7 ("bootmem: Replace work_with_active_regions() with for_= each_mem_pfn_range()") Signed-off-by: Jon Pan-Doh Tested-by: Sudheer Dantuluri Suggested-by: Gary Zibrat Reviewed-by: Kevin Tian Reviewed-by: Lu Baolu --- drivers/iommu/intel/iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index fd11a080380c..f55ec1fd7942 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -2071,7 +2071,7 @@ static int __init si_domain_init(int hw) for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) { ret =3D iommu_domain_identity_map(si_domain, mm_to_dma_pfn_start(start_pfn), - mm_to_dma_pfn_end(end_pfn)); + mm_to_dma_pfn_end(end_pfn-1)); if (ret) return ret; } --=20 2.45.2.803.g4e1b14247a-goog