[Public]
> -----Original Message-----
> From: Arnd Bergmann <a...@kernel.org>
> Sent: Monday, April 7, 2025 6:38 AM
> To: Bjorn Helgaas <bhelg...@google.com>
> Cc: Arnd Bergmann <a...@arndb.de>; Jeff Hugo
> <jeff.h...@oss.qualcomm.com>; Carl Vanderlip <quic_ca...@quicinc.com>; Oded
> Gabbay <ogab...@kernel.org>; Takashi Sakamoto <o-taka...@sakamocchi.jp>;
> Maarten Lankhorst <maarten.lankho...@linux.intel.com>; Maxime Ripard
> <mrip...@kernel.org>; Thomas Zimmermann <tzimmerm...@suse.de>; David
> Airlie <airl...@gmail.com>; Simona Vetter <sim...@ffwll.ch>; Deucher,
> Alexander
> <alexander.deuc...@amd.com>; Koenig, Christian
> <christian.koe...@amd.com>; Dave Airlie <airl...@redhat.com>; Jocelyn
> Falempe <jfale...@redhat.com>; Patrik Jakobsson
> <patrik.r.jakobs...@gmail.com>; Xinliang Liu <xinliang....@linaro.org>; Tian
> Tao
> <tiant...@hisilicon.com>; Xinwei Kong <kong.kongxin...@hisilicon.com>; Sumit
> Semwal <sumit.sem...@linaro.org>; Yongqin Liu <yongqin....@linaro.org>; John
> Stultz <jstu...@google.com>; Sui Jingfeng <suijingf...@loongson.cn>; Lyude
> Paul
> <ly...@redhat.com>; Danilo Krummrich <d...@kernel.org>; Gerd Hoffmann
> <kra...@redhat.com>; Zack Rusin <zack.ru...@broadcom.com>; Broadcom
> internal kernel review list <bcm-kernel-feedback-l...@broadcom.com>; Lucas De
> Marchi <lucas.demar...@intel.com>; Thomas Hellström
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> Subject: [RFC] PCI: add CONFIG_MMU dependency
>
> From: Arnd Bergmann <a...@arndb.de>
>
> It turns out that there are no platforms that have PCI but don't have an MMU,
> so
> adding a Kconfig dependency on CONFIG_PCI simplifies build testing kernels for
> those platforms a lot, and avoids a lot of inadvertent build regressions.
>
> Add a dependency for CONFIG_PCI and remove all the ones for PCI specific
> device drivers that are currently marked not having it.
>
> Link: https://lore.kernel.org/lkml/a41f1b20-a76c-43d8-8c36-
> f12744327...@app.fastmail.com/
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
For radeon, amdgpu:
Acked-by: Alex Deucher <alexander.deuc...@amd.com>
> ---
> drivers/accel/qaic/Kconfig | 1 -
> drivers/firewire/Kconfig | 2 +-
> drivers/gpu/drm/Kconfig | 2 +-
> drivers/gpu/drm/amd/amdgpu/Kconfig | 3 +--
> drivers/gpu/drm/ast/Kconfig | 2 +-
> drivers/gpu/drm/gma500/Kconfig | 2 +-
> drivers/gpu/drm/hisilicon/hibmc/Kconfig | 1 -
> drivers/gpu/drm/loongson/Kconfig | 2 +-
> drivers/gpu/drm/mgag200/Kconfig | 2 +-
> drivers/gpu/drm/nouveau/Kconfig | 3 +--
> drivers/gpu/drm/qxl/Kconfig | 2 +-
> drivers/gpu/drm/radeon/Kconfig | 2 +-
> drivers/gpu/drm/tiny/Kconfig | 2 +-
> drivers/gpu/drm/vmwgfx/Kconfig | 2 +-
> drivers/gpu/drm/xe/Kconfig | 2 +-
> drivers/net/ethernet/broadcom/Kconfig | 1 -
> drivers/pci/Kconfig | 1 +
> drivers/pci/pci.c | 4 ++--
> drivers/scsi/bnx2fc/Kconfig | 1 -
> drivers/scsi/bnx2i/Kconfig | 1 -
> drivers/vfio/pci/Kconfig | 2 +-
> 21 files changed, 17 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/accel/qaic/Kconfig b/drivers/accel/qaic/Kconfig index
> a9f866230058..5e405a19c157 100644
> --- a/drivers/accel/qaic/Kconfig
> +++ b/drivers/accel/qaic/Kconfig
> @@ -8,7 +8,6 @@ config DRM_ACCEL_QAIC
> depends on DRM_ACCEL
> depends on PCI && HAS_IOMEM
> depends on MHI_BUS
> - depends on MMU
> select CRC32
> help
> Enables driver for Qualcomm's Cloud AI accelerator PCIe cards that are
> diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig index
> 905c82e26ce7..a5f5e250223a 100644
> --- a/drivers/firewire/Kconfig
> +++ b/drivers/firewire/Kconfig
> @@ -83,7 +83,7 @@ config
> FIREWIRE_KUNIT_SELF_ID_SEQUENCE_HELPER_TEST
>
> config FIREWIRE_OHCI
> tristate "OHCI-1394 controllers"
> - depends on PCI && FIREWIRE && MMU
> + depends on PCI && FIREWIRE
> help
> Enable this driver if you have a FireWire controller based
> on the OHCI specification. For all practical purposes, this diff
> --git
> a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index
> 2cba2b6ebe1c..6e95d204597e 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -462,7 +462,7 @@ source "drivers/gpu/drm/imagination/Kconfig"
>
> config DRM_HYPERV
> tristate "DRM Support for Hyper-V synthetic video device"
> - depends on DRM && PCI && MMU && HYPERV
> + depends on DRM && PCI && HYPERV
> select DRM_CLIENT_SELECTION
> select DRM_KMS_HELPER
> select DRM_GEM_SHMEM_HELPER
> diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig
> b/drivers/gpu/drm/amd/amdgpu/Kconfig
> index 1a11cab741ac..058e3b3ad520 100644
> --- a/drivers/gpu/drm/amd/amdgpu/Kconfig
> +++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
> @@ -2,7 +2,7 @@
>
> config DRM_AMDGPU
> tristate "AMD GPU"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> depends on !UML
> select FW_LOADER
> select DRM_CLIENT
> @@ -68,7 +68,6 @@ config DRM_AMDGPU_CIK
> config DRM_AMDGPU_USERPTR
> bool "Always enable userptr write support"
> depends on DRM_AMDGPU
> - depends on MMU
> select HMM_MIRROR
> select MMU_NOTIFIER
> help
> diff --git a/drivers/gpu/drm/ast/Kconfig b/drivers/gpu/drm/ast/Kconfig index
> da0663542e8a..242fbccdf844 100644
> --- a/drivers/gpu/drm/ast/Kconfig
> +++ b/drivers/gpu/drm/ast/Kconfig
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0-only config DRM_AST
> tristate "AST server chips"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> select DRM_CLIENT_SELECTION
> select DRM_GEM_SHMEM_HELPER
> select DRM_KMS_HELPER
> diff --git a/drivers/gpu/drm/gma500/Kconfig b/drivers/gpu/drm/gma500/Kconfig
> index
> aa2ea128aa2f..a2acaa699dd5 100644
> --- a/drivers/gpu/drm/gma500/Kconfig
> +++ b/drivers/gpu/drm/gma500/Kconfig
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0-only config DRM_GMA500
> tristate "Intel GMA500/600/3600/3650 KMS Framebuffer"
> - depends on DRM && PCI && X86 && MMU && HAS_IOPORT
> + depends on DRM && PCI && X86 && HAS_IOPORT
> select DRM_CLIENT_SELECTION
> select DRM_KMS_HELPER
> select FB_IOMEM_HELPERS if DRM_FBDEV_EMULATION diff --git
> a/drivers/gpu/drm/hisilicon/hibmc/Kconfig
> b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
> index 98d77d74999d..d1f3f5793f34 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/Kconfig
> +++ b/drivers/gpu/drm/hisilicon/hibmc/Kconfig
> @@ -2,7 +2,6 @@
> config DRM_HISI_HIBMC
> tristate "DRM Support for Hisilicon Hibmc"
> depends on DRM && PCI
> - depends on MMU
> select DRM_CLIENT_SELECTION
> select DRM_DISPLAY_HELPER
> select DRM_DISPLAY_DP_HELPER
> diff --git a/drivers/gpu/drm/loongson/Kconfig
> b/drivers/gpu/drm/loongson/Kconfig
> index 552edfec7afb..d739d51cf54c 100644
> --- a/drivers/gpu/drm/loongson/Kconfig
> +++ b/drivers/gpu/drm/loongson/Kconfig
> @@ -2,7 +2,7 @@
>
> config DRM_LOONGSON
> tristate "DRM support for Loongson Graphics"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> depends on LOONGARCH || MIPS || COMPILE_TEST
> select DRM_CLIENT_SELECTION
> select DRM_KMS_HELPER
> diff --git a/drivers/gpu/drm/mgag200/Kconfig b/drivers/gpu/drm/mgag200/Kconfig
> index 412dcbea0e2d..a962ae564a75 100644
> --- a/drivers/gpu/drm/mgag200/Kconfig
> +++ b/drivers/gpu/drm/mgag200/Kconfig
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0-only config DRM_MGAG200
> tristate "Matrox G200"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> select DRM_CLIENT_SELECTION
> select DRM_GEM_SHMEM_HELPER
> select DRM_KMS_HELPER
> diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
> index 7b3e979c51ec..d1587639ebb0 100644
> --- a/drivers/gpu/drm/nouveau/Kconfig
> +++ b/drivers/gpu/drm/nouveau/Kconfig
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0-only config DRM_NOUVEAU
> tristate "Nouveau (NVIDIA) cards"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> select IOMMU_API
> select FW_LOADER
> select FW_CACHE if PM_SLEEP
> @@ -94,7 +94,6 @@ config DRM_NOUVEAU_SVM
> bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"
> depends on DEVICE_PRIVATE
> depends on DRM_NOUVEAU
> - depends on MMU
> depends on STAGING
> select HMM_MIRROR
> select MMU_NOTIFIER
> diff --git a/drivers/gpu/drm/qxl/Kconfig b/drivers/gpu/drm/qxl/Kconfig index
> 69427eb8bed2..d8f24bcae34b 100644
> --- a/drivers/gpu/drm/qxl/Kconfig
> +++ b/drivers/gpu/drm/qxl/Kconfig
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0-only config DRM_QXL
> tristate "QXL virtual GPU"
> - depends on DRM && PCI && MMU && HAS_IOPORT
> + depends on DRM && PCI && HAS_IOPORT
> select DRM_CLIENT_SELECTION
> select DRM_KMS_HELPER
> select DRM_TTM
> diff --git a/drivers/gpu/drm/radeon/Kconfig b/drivers/gpu/drm/radeon/Kconfig
> index
> f51bace9555d..c479f0c0dd5c 100644
> --- a/drivers/gpu/drm/radeon/Kconfig
> +++ b/drivers/gpu/drm/radeon/Kconfig
> @@ -2,7 +2,7 @@
>
> config DRM_RADEON
> tristate "ATI Radeon"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> depends on AGP || !AGP
> select FW_LOADER
> select DRM_CLIENT_SELECTION
> diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig index
> 54c84c9801c1..6ca12fe7f57a 100644
> --- a/drivers/gpu/drm/tiny/Kconfig
> +++ b/drivers/gpu/drm/tiny/Kconfig
> @@ -37,7 +37,7 @@ config DRM_BOCHS
>
> config DRM_CIRRUS_QEMU
> tristate "Cirrus driver for QEMU emulated device"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> select DRM_CLIENT_SELECTION
> select DRM_KMS_HELPER
> select DRM_GEM_SHMEM_HELPER
> diff --git a/drivers/gpu/drm/vmwgfx/Kconfig b/drivers/gpu/drm/vmwgfx/Kconfig
> index
> 6c3c2922ae8b..aab646b91ca9 100644
> --- a/drivers/gpu/drm/vmwgfx/Kconfig
> +++ b/drivers/gpu/drm/vmwgfx/Kconfig
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0
> config DRM_VMWGFX
> tristate "DRM driver for VMware Virtual GPU"
> - depends on DRM && PCI && MMU
> + depends on DRM && PCI
> depends on (X86 && HYPERVISOR_GUEST) || ARM64
> select DRM_CLIENT_SELECTION
> select DRM_TTM
> diff --git a/drivers/gpu/drm/xe/Kconfig b/drivers/gpu/drm/xe/Kconfig index
> 5c2f459a2925..2dec62737ff6 100644
> --- a/drivers/gpu/drm/xe/Kconfig
> +++ b/drivers/gpu/drm/xe/Kconfig
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0-only config DRM_XE
> tristate "Intel Xe Graphics"
> - depends on DRM && PCI && MMU && (m || (y && KUNIT=y))
> + depends on DRM && PCI && (m || (y && KUNIT=y))
> select INTERVAL_TREE
> # we need shmfs for the swappable backing store, and in particular
> # the shmem_readpage() which depends upon tmpfs diff --git
> a/drivers/net/ethernet/broadcom/Kconfig
> b/drivers/net/ethernet/broadcom/Kconfig
> index eeec8bf17cf4..aa43984a05cf 100644
> --- a/drivers/net/ethernet/broadcom/Kconfig
> +++ b/drivers/net/ethernet/broadcom/Kconfig
> @@ -96,7 +96,6 @@ config BNX2
> config CNIC
> tristate "QLogic CNIC support"
> depends on PCI && (IPV6 || IPV6=n)
> - depends on MMU
> select BNX2
> select UIO
> help
> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index
> da28295b4aac..9c0e4aaf4e8c 100644
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -21,6 +21,7 @@ config GENERIC_PCI_IOMAP menuconfig PCI
> bool "PCI support"
> depends on HAVE_PCI
> + depends on MMU
> help
> This option enables support for the PCI local bus, including
> support for PCI-X and the foundations for PCI Express support.
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index
> 4d7c9f64ea24..60a20a0ac41f
> 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -4257,7 +4257,7 @@ unsigned long __weak pci_address_to_pio(phys_addr_t
> address) #ifndef pci_remap_iospace int pci_remap_iospace(const struct
> resource
> *res, phys_addr_t phys_addr) { -#if defined(PCI_IOBASE) &&
> defined(CONFIG_MMU)
> +#if defined(PCI_IOBASE)
> unsigned long vaddr = (unsigned long)PCI_IOBASE + res->start;
>
> if (!(res->flags & IORESOURCE_IO))
> @@ -4290,7 +4290,7 @@ EXPORT_SYMBOL(pci_remap_iospace);
> */
> void pci_unmap_iospace(struct resource *res) { -#if defined(PCI_IOBASE) &&
> defined(CONFIG_MMU)
> +#if defined(PCI_IOBASE)
> unsigned long vaddr = (unsigned long)PCI_IOBASE + res->start;
>
> vunmap_range(vaddr, vaddr + resource_size(res)); diff --git
> a/drivers/scsi/bnx2fc/Kconfig b/drivers/scsi/bnx2fc/Kconfig index
> ecdc0f0f4f4e..3cf7e08df809 100644
> --- a/drivers/scsi/bnx2fc/Kconfig
> +++ b/drivers/scsi/bnx2fc/Kconfig
> @@ -5,7 +5,6 @@ config SCSI_BNX2X_FCOE
> depends on (IPV6 || IPV6=n)
> depends on LIBFC
> depends on LIBFCOE
> - depends on MMU
> select NETDEVICES
> select ETHERNET
> select NET_VENDOR_BROADCOM
> diff --git a/drivers/scsi/bnx2i/Kconfig b/drivers/scsi/bnx2i/Kconfig index
> 0cc06c2ce0b8..75ace2302fed 100644
> --- a/drivers/scsi/bnx2i/Kconfig
> +++ b/drivers/scsi/bnx2i/Kconfig
> @@ -4,7 +4,6 @@ config SCSI_BNX2_ISCSI
> depends on NET
> depends on PCI
> depends on (IPV6 || IPV6=n)
> - depends on MMU
> select SCSI_ISCSI_ATTRS
> select NETDEVICES
> select ETHERNET
> diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index
> c3bcb6911c53..2b0172f54665 100644
> --- a/drivers/vfio/pci/Kconfig
> +++ b/drivers/vfio/pci/Kconfig
> @@ -1,6 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0-only menu "VFIO support for PCI devices"
> - depends on PCI && MMU
> + depends on PCI
>
> config VFIO_PCI_CORE
> tristate
> --
> 2.39.5
