From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C581F36604D for ; Fri, 27 Feb 2026 17:52:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772214776; cv=none; b=pB/LAPcE32U4778NNgUILbLzA6NF3U4PPPD+qMW8thtj4sLcAQTqimKtlgvvdaxV3nCE2vk+5fRt/Gt4VgdSpoB5gtSERLK8HUFkOdtDl7HftUuSrU46IS0MizGwG6zpoEtHa6WIIVGxGGcCvVyF/sBo4EWEAKSQF8sObSU/1sI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772214776; c=relaxed/simple; bh=xVSDUH51PrQlO9FZjAgm0NH0MdnAZeIcuaw7S9IuRFI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=cKfzO6ltICy5ZZ4Kzae+MMdvYCLqaAsh6skpFxRXXe8BMgBmn4dtu6DQPzBZlCeabttLUxPeRSVx2HBRJjXxcL3CcmYc7Yb/ubCwGcuOt0ast7AJjTb1QEpRiAqMsScj3Wf1REBU8Ef0X6chQpLTY9Qjc8N4MH2PII58+cF1u0Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=g0iPFCKZ; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="g0iPFCKZ" Received: from DESKTOP-0403QTC.corp.microsoft.com (unknown [20.236.11.69]) by linux.microsoft.com (Postfix) with ESMTPSA id 134AD20B6F02; Fri, 27 Feb 2026 09:52:55 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 134AD20B6F02 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1772214775; bh=78agt53msrArRhO0OIzV37Pk6/mDTJ+S/0LVkBcuyc0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g0iPFCKZzCNM6pfmmG8JLx535OxcnVhsxFe7FitX75IzvJ+EQGvAR/BProDFVycI9 1X/RkOrQ02s/vWN/JkqYm/xjcrXXk/ZSnxy934xG0RMzPdUNWg+Mrc4ZelsIVTBrPS 6csyL4+/lD6q4RHlCWBdcejJLJ/IqpJ62TNiiOGM= From: Jacob Pan To: linux-kernel@vger.kernel.org, "iommu@lists.linux.dev" , Jason Gunthorpe , Alex Williamson , Joerg Roedel , David Matlack , Nicolin Chen , "Tian, Kevin" , Yi Liu , Baolu Lu Cc: skhawaja@google.com, pasha.tatashin@soleen.com, Jacob Pan , Jean Philippe-Brucker , Robin Murphy Subject: [PATCH 07/11] vfio: Update noiommu device detection logic for cdev Date: Fri, 27 Feb 2026 09:52:43 -0800 Message-Id: <20260227175247.26103-8-jacob.pan@linux.microsoft.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260227175247.26103-1-jacob.pan@linux.microsoft.com> References: <20260227175247.26103-1-jacob.pan@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Rework vfio_device_is_noiommu() to derive noiommu mode based on device, group type, and configurations. Signed-off-by: Jacob Pan --- drivers/vfio/vfio.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index 838c08077ce2..c5541967ef9b 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -127,8 +127,13 @@ static inline bool vfio_null_group_allowed(void) static inline bool vfio_device_is_noiommu(struct vfio_device *vdev) { - return IS_ENABLED(CONFIG_VFIO_NOIOMMU) && - vdev->group->type == VFIO_NO_IOMMU; + if (!IS_ENABLED(CONFIG_VFIO_NOIOMMU)) + return false; + + if (vfio_null_group_allowed()) + return vdev->noiommu; + + return vdev->group->type == VFIO_NO_IOMMU; } #else struct vfio_group; -- 2.34.1