From: Dave Jiang <dave.jiang@intel.com>
To: mhonap@nvidia.com, aniketa@nvidia.com, ankita@nvidia.com,
alwilliamson@nvidia.com, vsethi@nvidia.com, jgg@nvidia.com,
mochs@nvidia.com, skolothumtho@nvidia.com,
alejandro.lucero-palau@amd.com, dave@stgolabs.net,
jonathan.cameron@huawei.com, alison.schofield@intel.com,
vishal.l.verma@intel.com, ira.weiny@intel.com,
dan.j.williams@intel.com, jgg@ziepe.ca, yishaih@nvidia.com,
kevin.tian@intel.com
Cc: cjia@nvidia.com, targupta@nvidia.com, zhiw@nvidia.com,
kjaju@nvidia.com, linux-kernel@vger.kernel.org,
linux-cxl@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH 11/20] vfio/cxl: Expose DPA memory region to userspace with fault+zap mmap
Date: Fri, 13 Mar 2026 10:07:43 -0700 [thread overview]
Message-ID: <4168a704-e9ec-405a-8e66-80c7e854d7c1@intel.com> (raw)
In-Reply-To: <20260311203440.752648-12-mhonap@nvidia.com>
On 3/11/26 1:34 PM, mhonap@nvidia.com wrote:
> From: Manish Honap <mhonap@nvidia.com>
< --snip-- >
> +int vfio_cxl_register_cxl_region(struct vfio_pci_core_device *vdev)
> +{
> + struct vfio_pci_cxl_state *cxl = vdev->cxl;
> + u32 flags;
> + int ret;
> +
> + if (!cxl)
> + return -ENODEV;
> +
> + if (!cxl->region || cxl->region_vaddr)
> + return -ENODEV;
> +
> + cxl->region_vaddr = ioremap_cache(cxl->region_hpa, cxl->region_size);
Should this be using memremap_pages() family of call rather than ioremap() like how DAX does it? CXL mem regions are not MMIO regions.
DJ
next prev parent reply other threads:[~2026-03-13 17:07 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 20:34 [PATCH 00/20] vfio/pci: Add CXL Type-2 device passthrough support mhonap
2026-03-11 20:34 ` [PATCH 01/20] cxl: Introduce cxl_get_hdm_reg_info() mhonap
2026-03-12 11:28 ` Jonathan Cameron
2026-03-12 16:33 ` Dave Jiang
2026-03-11 20:34 ` [PATCH 02/20] cxl: Expose cxl subsystem specific functions for vfio mhonap
2026-03-12 16:49 ` Dave Jiang
2026-03-13 10:05 ` Manish Honap
2026-03-11 20:34 ` [PATCH 03/20] cxl: Move CXL spec defines to public header mhonap
2026-03-13 12:18 ` Jonathan Cameron
2026-03-13 16:56 ` Dave Jiang
2026-03-18 14:56 ` Jonathan Cameron
2026-03-18 17:51 ` Manish Honap
2026-03-11 20:34 ` [PATCH 04/20] cxl: Media ready check refactoring mhonap
2026-03-12 20:29 ` Dave Jiang
2026-03-13 10:05 ` Manish Honap
2026-03-11 20:34 ` [PATCH 05/20] cxl: Expose BAR index and offset from register map mhonap
2026-03-12 20:58 ` Dave Jiang
2026-03-13 10:11 ` Manish Honap
2026-03-11 20:34 ` [PATCH 06/20] vfio/cxl: Add UAPI for CXL Type-2 device passthrough mhonap
2026-03-12 21:04 ` Dave Jiang
2026-03-11 20:34 ` [PATCH 07/20] vfio/pci: Add CXL state to vfio_pci_core_device mhonap
2026-03-11 20:34 ` [PATCH 08/20] vfio/pci: Add vfio-cxl Kconfig and build infrastructure mhonap
2026-03-13 12:27 ` Jonathan Cameron
2026-03-18 17:21 ` Manish Honap
2026-03-11 20:34 ` [PATCH 09/20] vfio/cxl: Implement CXL device detection and HDM register probing mhonap
2026-03-12 22:31 ` Dave Jiang
2026-03-13 12:43 ` Jonathan Cameron
2026-03-18 17:43 ` Manish Honap
2026-03-11 20:34 ` [PATCH 10/20] vfio/cxl: CXL region management mhonap
2026-03-12 22:55 ` Dave Jiang
2026-03-13 12:52 ` Jonathan Cameron
2026-03-18 17:48 ` Manish Honap
2026-03-11 20:34 ` [PATCH 11/20] vfio/cxl: Expose DPA memory region to userspace with fault+zap mmap mhonap
2026-03-13 17:07 ` Dave Jiang [this message]
2026-03-18 17:54 ` Manish Honap
2026-03-11 20:34 ` [PATCH 12/20] vfio/pci: Export config access helpers mhonap
2026-03-11 20:34 ` [PATCH 13/20] vfio/cxl: Introduce HDM decoder register emulation framework mhonap
2026-03-13 19:05 ` Dave Jiang
2026-03-18 17:58 ` Manish Honap
2026-03-11 20:34 ` [PATCH 14/20] vfio/cxl: Check media readiness and create CXL memdev mhonap
2026-03-11 20:34 ` [PATCH 15/20] vfio/cxl: Introduce CXL DVSEC configuration space emulation mhonap
2026-03-13 22:07 ` Dave Jiang
2026-03-18 18:41 ` Manish Honap
2026-03-11 20:34 ` [PATCH 16/20] vfio/pci: Expose CXL device and region info via VFIO ioctl mhonap
2026-03-11 20:34 ` [PATCH 17/20] vfio/cxl: Provide opt-out for CXL feature mhonap
2026-03-11 20:34 ` [PATCH 18/20] docs: vfio-pci: Document CXL Type-2 device passthrough mhonap
2026-03-13 12:13 ` Jonathan Cameron
2026-03-17 21:24 ` Alex Williamson
2026-03-19 16:06 ` Jonathan Cameron
2026-03-23 14:36 ` Manish Honap
2026-03-11 20:34 ` [PATCH 19/20] selftests/vfio: Add CXL Type-2 passthrough tests mhonap
2026-03-11 20:34 ` [PATCH 20/20] selftests/vfio: Fix VLA initialisation in vfio_pci_irq_set() mhonap
2026-03-13 22:23 ` Dave Jiang
2026-03-18 18:07 ` Manish Honap
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