[PATCH v2 2/2] PCI: Allow building CONFIG_OF drivers with COMPILE_TEST

Bjorn Helgaas helgaas at kernel.org
Wed Nov 30 06:29:25 PST 2022 

[+cc Jean]

On Wed, Nov 16, 2022 at 02:51:00PM -0600, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas at google.com>
> 
> Many drivers depend on OF interfaces, so they won't be functional if
> CONFIG_OF is not set.  But OF provides stub functions in that case, so make
> them buildable if CONFIG_COMPILE_TEST is set.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas at google.com>

After wasting all your time on this, I think this patch is a bad idea
and I should drop it.

Jean pointed out at [1] that after 0166dc11be91 ("of: make CONFIG_OF
user selectable"), we can enable CONFIG_OF on any architecture
regardless of whether it *needs* OF, and doing so yields better
compile testing than simply using COMPILE_TEST to build without
CONFIG_OF.

Thank you very much, Jean, for pointing this out!

[1] https://lore.kernel.org/r/20221124142441.3a230524@endymion.delvare

> ---
>  drivers/pci/controller/Kconfig          | 34 +++++++++++----------
>  drivers/pci/controller/cadence/Kconfig  | 12 ++++----
>  drivers/pci/controller/dwc/Kconfig      | 40 ++++++++++++++++---------
>  drivers/pci/controller/mobiveil/Kconfig |  2 +-
>  4 files changed, 51 insertions(+), 37 deletions(-)
> 
> diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
> index bfd9bac37e24..a62e9fbb69ca 100644
> --- a/drivers/pci/controller/Kconfig
> +++ b/drivers/pci/controller/Kconfig
> @@ -8,7 +8,7 @@ config PCI_MVEBU
>  	depends on ARCH_MVEBU || ARCH_DOVE || COMPILE_TEST
>  	depends on MVEBU_MBUS
>  	depends on ARM
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	select PCI_BRIDGE_EMUL
>  	help
>  	 Add support for Marvell EBU PCIe controller. This PCIe controller
> @@ -18,7 +18,7 @@ config PCI_MVEBU
>  config PCI_AARDVARK
>  	tristate "Aardvark PCIe controller"
>  	depends on (ARCH_MVEBU && ARM64) || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCI_BRIDGE_EMUL
>  	help
> @@ -38,13 +38,14 @@ config PCIE_XILINX_NWL
>  
>  config PCI_FTPCI100
>  	bool "Faraday Technology FTPCI100 PCI controller"
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	default ARCH_GEMINI
>  
>  config PCI_IXP4XX
>  	bool "Intel IXP4xx PCI controller"
> -	depends on ARM && OF
> +	depends on ARM
>  	depends on ARCH_IXP4XX || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	default ARCH_IXP4XX
>  	help
>  	  Say Y here if you want support for the PCI host controller found
> @@ -89,7 +90,7 @@ config PCI_HOST_COMMON
>  
>  config PCI_HOST_GENERIC
>  	tristate "Generic PCI host controller"
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	select PCI_HOST_COMMON
>  	select IRQ_DOMAIN
>  	help
> @@ -115,7 +116,7 @@ config PCIE_XILINX_CPM
>  config PCI_XGENE
>  	bool "X-Gene PCIe controller"
>  	depends on ARM64 || COMPILE_TEST
> -	depends on OF || (ACPI && PCI_QUIRKS)
> +	depends on (OF || COMPILE_TEST) || (ACPI && PCI_QUIRKS)
>  	help
>  	  Say Y here if you want internal PCI support on APM X-Gene SoC.
>  	  There are 5 internal PCIe ports available. Each port is GEN3 capable
> @@ -132,7 +133,7 @@ config PCI_XGENE_MSI
>  
>  config PCI_V3_SEMI
>  	bool "V3 Semiconductor PCI controller"
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on ARM || COMPILE_TEST
>  	default ARCH_INTEGRATOR_AP
>  
> @@ -150,7 +151,7 @@ config PCIE_IPROC
>  config PCIE_IPROC_PLATFORM
>  	tristate "Broadcom iProc PCIe platform bus driver"
>  	depends on ARCH_BCM_IPROC || (ARM && COMPILE_TEST)
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	select PCIE_IPROC
>  	default ARCH_BCM_IPROC
>  	help
> @@ -194,7 +195,7 @@ config PCIE_ALTERA_MSI
>  config PCI_HOST_THUNDER_PEM
>  	bool "Cavium Thunder PCIe controller to off-chip devices"
>  	depends on ARM64 || COMPILE_TEST
> -	depends on OF || (ACPI && PCI_QUIRKS)
> +	depends on (OF || COMPILE_TEST) || (ACPI && PCI_QUIRKS)
>  	select PCI_HOST_COMMON
>  	help
>  	  Say Y here if you want PCIe support for CN88XX Cavium Thunder SoCs.
> @@ -202,7 +203,7 @@ config PCI_HOST_THUNDER_PEM
>  config PCI_HOST_THUNDER_ECAM
>  	bool "Cavium Thunder ECAM controller to on-chip devices on pass-1.x silicon"
>  	depends on ARM64 || COMPILE_TEST
> -	depends on OF || (ACPI && PCI_QUIRKS)
> +	depends on (OF || COMPILE_TEST) || (ACPI && PCI_QUIRKS)
>  	select PCI_HOST_COMMON
>  	help
>  	  Say Y here if you want ECAM support for CN88XX-Pass-1.x Cavium Thunder SoCs.
> @@ -214,7 +215,7 @@ config PCIE_ROCKCHIP
>  config PCIE_ROCKCHIP_HOST
>  	tristate "Rockchip PCIe host controller"
>  	depends on ARCH_ROCKCHIP || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select MFD_SYSCON
>  	select PCIE_ROCKCHIP
> @@ -226,7 +227,7 @@ config PCIE_ROCKCHIP_HOST
>  config PCIE_ROCKCHIP_EP
>  	bool "Rockchip PCIe endpoint controller"
>  	depends on ARCH_ROCKCHIP || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_ENDPOINT
>  	select MFD_SYSCON
>  	select PCIE_ROCKCHIP
> @@ -238,7 +239,7 @@ config PCIE_ROCKCHIP_EP
>  config PCIE_MEDIATEK
>  	tristate "MediaTek PCIe controller"
>  	depends on ARCH_AIROHA || ARCH_MEDIATEK || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	help
>  	  Say Y here if you want to enable PCIe controller support on
> @@ -276,7 +277,7 @@ config PCIE_BRCMSTB
>  	tristate "Broadcom Brcmstb PCIe host controller"
>  	depends on ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCMBCA || \
>  		   BMIPS_GENERIC || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	default ARCH_BRCMSTB || BMIPS_GENERIC
>  	help
> @@ -302,7 +303,8 @@ config PCI_LOONGSON
>  
>  config PCIE_MICROCHIP_HOST
>  	bool "Microchip AXI PCIe host bridge support"
> -	depends on PCI_MSI && OF
> +	depends on OF || COMPILE_TEST
> +	depends on PCI_MSI
>  	select PCI_MSI_IRQ_DOMAIN
>  	select GENERIC_MSI_IRQ_DOMAIN
>  	select PCI_HOST_COMMON
> @@ -325,7 +327,7 @@ config PCIE_APPLE_MSI_DOORBELL_ADDR
>  config PCIE_APPLE
>  	tristate "Apple PCIe controller"
>  	depends on ARCH_APPLE || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCI_HOST_COMMON
>  	help
> diff --git a/drivers/pci/controller/cadence/Kconfig b/drivers/pci/controller/cadence/Kconfig
> index 5d30564190e1..44f18b88817f 100644
> --- a/drivers/pci/controller/cadence/Kconfig
> +++ b/drivers/pci/controller/cadence/Kconfig
> @@ -8,13 +8,13 @@ config PCIE_CADENCE
>  
>  config PCIE_CADENCE_HOST
>  	bool
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	select IRQ_DOMAIN
>  	select PCIE_CADENCE
>  
>  config PCIE_CADENCE_EP
>  	bool
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_ENDPOINT
>  	select PCIE_CADENCE
>  
> @@ -23,7 +23,7 @@ config PCIE_CADENCE_PLAT
>  
>  config PCIE_CADENCE_PLAT_HOST
>  	bool "Cadence PCIe platform host controller"
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	select PCIE_CADENCE_HOST
>  	select PCIE_CADENCE_PLAT
>  	help
> @@ -33,7 +33,7 @@ config PCIE_CADENCE_PLAT_HOST
>  
>  config PCIE_CADENCE_PLAT_EP
>  	bool "Cadence PCIe platform endpoint controller"
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_ENDPOINT
>  	select PCIE_CADENCE_EP
>  	select PCIE_CADENCE_PLAT
> @@ -47,7 +47,7 @@ config PCI_J721E
>  
>  config PCI_J721E_HOST
>  	bool "TI J721E PCIe platform host controller"
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	select PCIE_CADENCE_HOST
>  	select PCI_J721E
>  	help
> @@ -57,7 +57,7 @@ config PCI_J721E_HOST
>  
>  config PCI_J721E_EP
>  	bool "TI J721E PCIe platform endpoint controller"
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_ENDPOINT
>  	select PCIE_CADENCE_EP
>  	select PCI_J721E
> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> index 62ce3abf0f19..aa0a2fcd41f1 100644
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -20,7 +20,8 @@ config PCI_DRA7XX
>  config PCI_DRA7XX_HOST
>  	tristate "TI DRA7xx PCIe controller Host Mode"
>  	depends on SOC_DRA7XX || COMPILE_TEST
> -	depends on OF && HAS_IOMEM && TI_PIPE3
> +	depends on OF || COMPILE_TEST
> +	depends on HAS_IOMEM && TI_PIPE3
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	select PCI_DRA7XX
> @@ -36,7 +37,8 @@ config PCI_DRA7XX_HOST
>  config PCI_DRA7XX_EP
>  	tristate "TI DRA7xx PCIe controller Endpoint Mode"
>  	depends on SOC_DRA7XX || COMPILE_TEST
> -	depends on OF && HAS_IOMEM && TI_PIPE3
> +	depends on OF || COMPILE_TEST
> +	depends on HAS_IOMEM && TI_PIPE3
>  	depends on PCI_ENDPOINT
>  	select PCIE_DW_EP
>  	select PCI_DRA7XX
> @@ -134,7 +136,8 @@ config PCI_KEYSTONE_EP
>  
>  config PCI_LAYERSCAPE
>  	bool "Freescale Layerscape PCIe controller - Host mode"
> -	depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
> +	depends on ARM || ARCH_LAYERSCAPE || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	select MFD_SYSCON
> @@ -147,7 +150,8 @@ config PCI_LAYERSCAPE
>  
>  config PCI_LAYERSCAPE_EP
>  	bool "Freescale Layerscape PCIe controller - Endpoint mode"
> -	depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
> +	depends on ARM || ARCH_LAYERSCAPE || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_ENDPOINT
>  	select PCIE_DW_EP
>  	help
> @@ -158,8 +162,9 @@ config PCI_LAYERSCAPE_EP
>  	  controller works in RC mode.
>  
>  config PCI_HISI
> -	depends on OF && (ARM64 || COMPILE_TEST)
>  	bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"
> +	depends on ARM64 || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	select PCI_HOST_COMMON
> @@ -169,7 +174,8 @@ config PCI_HISI
>  
>  config PCIE_QCOM
>  	bool "Qualcomm PCIe controller"
> -	depends on OF && (ARCH_QCOM || COMPILE_TEST)
> +	depends on ARCH_QCOM || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	select CRC8
> @@ -180,7 +186,8 @@ config PCIE_QCOM
>  
>  config PCIE_QCOM_EP
>  	tristate "Qualcomm PCIe controller - Endpoint mode"
> -	depends on OF && (ARCH_QCOM || COMPILE_TEST)
> +	depends on ARCH_QCOM || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_ENDPOINT
>  	select PCIE_DW_EP
>  	help
> @@ -226,16 +233,17 @@ config PCIE_ROCKCHIP_DW_HOST
>  	bool "Rockchip DesignWare PCIe controller"
>  	select PCIE_DW
>  	select PCIE_DW_HOST
> -	depends on PCI_MSI_IRQ_DOMAIN
>  	depends on ARCH_ROCKCHIP || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
> +	depends on PCI_MSI_IRQ_DOMAIN
>  	help
>  	  Enables support for the DesignWare PCIe controller in the
>  	  Rockchip SoC except RK3399.
>  
>  config PCIE_INTEL_GW
>  	bool "Intel Gateway PCIe host controller support"
> -	depends on OF && (X86 || COMPILE_TEST)
> +	depends on X86 || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	help
> @@ -273,8 +281,9 @@ config PCIE_KEEMBAY_EP
>  	  DesignWare core functions.
>  
>  config PCIE_KIRIN
> -	depends on OF && (ARM64 || COMPILE_TEST)
>  	tristate "HiSilicon Kirin series SoCs PCIe controllers"
> +	depends on ARM64 || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	help
> @@ -345,7 +354,8 @@ config PCIE_VISCONTI_HOST
>  config PCIE_UNIPHIER
>  	bool "Socionext UniPhier PCIe host controllers"
>  	depends on ARCH_UNIPHIER || COMPILE_TEST
> -	depends on OF && HAS_IOMEM
> +	depends on OF || COMPILE_TEST
> +	depends on HAS_IOMEM
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	help
> @@ -355,7 +365,8 @@ config PCIE_UNIPHIER
>  config PCIE_UNIPHIER_EP
>  	bool "Socionext UniPhier PCIe endpoint controllers"
>  	depends on ARCH_UNIPHIER || COMPILE_TEST
> -	depends on OF && HAS_IOMEM
> +	depends on OF || COMPILE_TEST
> +	depends on HAS_IOMEM
>  	depends on PCI_ENDPOINT
>  	select PCIE_DW_EP
>  	help
> @@ -364,7 +375,8 @@ config PCIE_UNIPHIER_EP
>  
>  config PCIE_AL
>  	bool "Amazon Annapurna Labs PCIe controller"
> -	depends on OF && (ARM64 || COMPILE_TEST)
> +	depends on ARM64 || COMPILE_TEST
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_DW_HOST
>  	select PCI_ECAM
> diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
> index e4643fb94e78..24ea35927185 100644
> --- a/drivers/pci/controller/mobiveil/Kconfig
> +++ b/drivers/pci/controller/mobiveil/Kconfig
> @@ -14,7 +14,7 @@ config PCIE_MOBIVEIL_HOST
>  config PCIE_MOBIVEIL_PLAT
>  	bool "Mobiveil AXI PCIe controller"
>  	depends on ARCH_ZYNQMP || COMPILE_TEST
> -	depends on OF
> +	depends on OF || COMPILE_TEST
>  	depends on PCI_MSI_IRQ_DOMAIN
>  	select PCIE_MOBIVEIL_HOST
>  	help
> -- 
> 2.25.1
> 
> 
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