linux-kernel - [RFC 5/8] vfio: IOMMUFD relax requirement for noiommu mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251201173012.18371-6-jacob.pan@linux.microsoft.com>
Date: Mon,  1 Dec 2025 09:30:09 -0800
From: Jacob Pan <jacob.pan@...ux.microsoft.com>
To: linux-kernel@...r.kernel.org,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	Jason Gunthorpe <jgg@...dia.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Nicolin Chen <nicolinc@...dia.com>,
	"Tian, Kevin" <kevin.tian@...el.com>,
	"Liu, Yi L" <yi.l.liu@...el.com>
Cc: skhawaja@...gle.com,
	pasha.tatashin@...een.com,
	Jacob Pan <jacob.pan@...ux.microsoft.com>,
	Zhang Yu <zhangyu1@...ux.microsoft.com>,
	Jean Philippe-Brucker <jean-philippe@...aro.org>,
	David Matlack <dmatlack@...gle.com>
Subject: [RFC 5/8] vfio: IOMMUFD relax requirement for noiommu mode

noiommu device only has auto domain, does not need to attach to other ioas.

Signed-off-by: Jacob Pan <jacob.pan@...ux.microsoft.com>
---
 drivers/vfio/vfio_main.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index 38c8e9350a60..805d30b0b82f 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -317,9 +317,7 @@ static int __vfio_register_dev(struct vfio_device *device,
 
 	if (WARN_ON(IS_ENABLED(CONFIG_IOMMUFD) &&
 		    (!device->ops->bind_iommufd ||
-		     !device->ops->unbind_iommufd ||
-		     !device->ops->attach_ioas ||
-		     !device->ops->detach_ioas)))
+		     !device->ops->unbind_iommufd)))
 		return -EINVAL;
 
 	/*
-- 
2.34.1