From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (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 87259353ED9 for ; Thu, 30 Apr 2026 22:54:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777589659; cv=none; b=JY7hCnHA3ke151nHUYxaCKvPu5JaM40mggY547zGLjQ9gh38Xz/uaDbzXCtfy2Yk3lV8fAFDSYV5F325R9PIwwFjPx6XqaXonVeOmJ01DhPfY4Eed0LHrWR2+8Ap/3HikCUKMsWK8MYa6PBL7mHYA03xLAhki3wecrJR0uHBovw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777589659; c=relaxed/simple; bh=m5Oa9xrjs93ypR2Ul+XH1avEWXnt5/WG1koUdy/DN8w=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=Sk+zlNxh6JnhbtHn3jvV0wKfVuMfGJtMc19Qo4lM48/ZYKt6/x6jwW8O+Efv6cWolvI9yx0cnYsMHWdttPquTdTWokq7giXbn5SI0mWnUZ//gSALMSUO1+8h7Dy8ZkaDJJlp14Rpq9B0GXq+JKuz4JEyJsRpS7gtsZMrDcvrllk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--wnliu.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=bMVoMpZe; arc=none smtp.client-ip=74.125.82.202 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--wnliu.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="bMVoMpZe" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2ee34588671so723227eec.0 for ; Thu, 30 Apr 2026 15:54:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777589658; x=1778194458; darn=lists.linux.dev; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=gZHidt1m0JlvpU+VvYCM2F4O0JmyQBeuxJIN2gPX9og=; b=bMVoMpZeBXf/gI+Njs5lnR8WC5Rz1JXrI70DGUt71tszJ0SmF09HhDEOED5iJK8YtZ 892gnPvH+GDCxaXyWGSOk/FuCEVOCPB9JFwZI9HiFZO3Tl81O4jUibgVPHf3iv1QadP/ et614JXBJmCrIqDC7ucXqKPzL3mzokWohLeae3pL9liEZ4QIbPEU0cg2ZJvtqWU6mgrM giy+fWnjeBS7I6UmXa/W3Mq/yxcnX3fjiTagS1QzuddyXaHA6lI5MyN0ncRm6Mz0xx/m UL1zO5xxodft7N4Fk8oJHpVTCRhh8lMf/6FBndRsDQiEwAiTsWZoJS0jRGZTT4qhhrBI EA8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777589658; x=1778194458; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=gZHidt1m0JlvpU+VvYCM2F4O0JmyQBeuxJIN2gPX9og=; b=e0kKo1PSHlFAbmwkv5NhW1REQTDWHizXVKlTKTkLXC61lUw6xIR82kj4UGkc606DNS OtMWzLXfgJdiMMQCOf2PfR7HAwCmZeOcq8fmogxYB7Pz1zl6nIyGlfM69eeK7wwhPh+2 s2kq3DcXYDFzKGtwM0ghigH4FwjF3+4e+4T6rjSGsaHfV3EwwjE7Tru/ettxGHqDjnFB 1aZ4PHkoeKRiRjqFpL/kLMlMco1dTjooI1w170otiVLpD9vUJ1zhWqQTddgH12yonyA9 lGLVZX3Vba1nl3TQFcg6kGhrfJz1J1oU2PV/ALlOEIYJU33SiOWb83AHZaM7lPLhtdCn vaaw== X-Forwarded-Encrypted: i=1; AFNElJ9fAQf0I5Vsk0Fas2OUounQ29Eah8qlxbSV3bBf2gY9QYK/eIk57jkcYr/cpda9RjCs3H9cekyG@lists.linux.dev X-Gm-Message-State: AOJu0YxqJj6KqjXcsVFpNKo+E4aP3N3b0/2cpZ3SbL62x3DcqDLYD8Zo 77z8eU+aRrq8077R/yqvacUrU/0FVVwm6dJWl7aJAKe+0GHwIULD2HsAtaLXfYm6+fLuIDZO77F ZBA== X-Received: from dybod18.prod.google.com ([2002:a05:7301:3f92:b0:2ed:a84e:18d3]) (user=wnliu job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7301:901:b0:2ed:f791:3417 with SMTP id 5a478bee46e88-2edf7a08036mr1180335eec.25.1777589657332; Thu, 30 Apr 2026 15:54:17 -0700 (PDT) Date: Thu, 30 Apr 2026 22:54:14 +0000 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260430225414.205094-1-wnliu@google.com> Subject: [PATCH] iommu/amd: Fix precedence order in set_dte_passthrough() From: Weinan Liu To: iommu@lists.linux.dev, jgg@nvidia.com, joro@8bytes.org, suravee.suthikulpanit@amd.com Cc: will@kernel.org, patches@lists.linux.dev, robin.murphy@arm.com, vasant.hegde@amd.com, santosh.shukla@amd.com, chrisl@kernel.org, Weinan Liu Content-Type: text/plain; charset="UTF-8" Bitwise OR | operator has a higher precedence than the ternary ?: operatior. It will be incorrectly evaluated as: new->data[1] |= (FIELD_PREP(...) | dev_data->ats_enabled) ? DTE_FLAG_IOTLB : 0; Wrap the conditional operation in parentheses to enforce the correct evaluation order. Fixes: 93eee2a49c1b ("iommu/amd: Refactor logic to program the host page table in DTE") Signed-off-by: Weinan Liu --- drivers/iommu/amd/iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 01171361f9bc..ccffbecb15c2 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2149,7 +2149,8 @@ static void set_dte_passthrough(struct iommu_dev_data *dev_data, new->data[0] |= DTE_FLAG_TV | DTE_FLAG_IR | DTE_FLAG_IW; new->data[1] |= FIELD_PREP(DTE_DOMID_MASK, domain->id) | - (dev_data->ats_enabled) ? DTE_FLAG_IOTLB : 0; + (dev_data->ats_enabled ? DTE_FLAG_IOTLB : 0); + } static void set_dte_entry(struct amd_iommu *iommu, -- 2.54.0.545.g6539524ca2-goog