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Date:   Tue, 10 Mar 2020 08:16:38 -0400
From:   "Michael S. Tsirkin" <mst@redhat.com>
To:     Anup Patel <anup.patel@wdc.com>
Cc:     Palmer Dabbelt <palmer@dabbelt.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Anup Patel <anup@brainfault.org>, linux-kernel@vger.kernel.org,
        Atish Patra <atish.patra@wdc.com>,
        Alistair Francis <Alistair.Francis@wdc.com>,
        linux-riscv@lists.infradead.org
Subject: Re: [PATCH] RISC-V: Only select essential drivers for SOC_VIRT config
Message-ID: <20200310081558-mutt-send-email-mst@kernel.org>
References: <20200310115925.126174-1-anup.patel@wdc.com>
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On Tue, Mar 10, 2020 at 05:29:25PM +0530, Anup Patel wrote:
> The kconfig select causes build failues for SOC_VIRT config becaus
> we are selecting lot of VIRTIO drivers without selecting all required
> dependencies.
> 
> Better approach is to only select essential drivers from SOC_VIRT
> config option and enable required VIRTIO drivers using defconfigs.
> 
> Fixes: 759bdc168181 ("RISC-V: Add kconfig option for QEMU virt machine")
> Signed-off-by: Anup Patel <anup.patel@wdc.com>

Yea makes sense.

Acked-by: Michael S. Tsirkin <mst@redhat.com>

> ---
>  arch/riscv/Kconfig.socs           | 14 --------------
>  arch/riscv/configs/defconfig      | 16 +++++++++++++++-
>  arch/riscv/configs/rv32_defconfig | 16 +++++++++++++++-
>  3 files changed, 30 insertions(+), 16 deletions(-)
> 
> diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
> index 3078b2de0b2d..a131174a0a77 100644
> --- a/arch/riscv/Kconfig.socs
> +++ b/arch/riscv/Kconfig.socs
> @@ -12,20 +12,6 @@ config SOC_SIFIVE
>  
>  config SOC_VIRT
>         bool "QEMU Virt Machine"
> -       select VIRTIO_PCI
> -       select VIRTIO_BALLOON
> -       select VIRTIO_MMIO
> -       select VIRTIO_CONSOLE
> -       select VIRTIO_NET
> -       select NET_9P_VIRTIO
> -       select VIRTIO_BLK
> -       select SCSI_VIRTIO
> -       select DRM_VIRTIO_GPU
> -       select HW_RANDOM_VIRTIO
> -       select RPMSG_CHAR
> -       select RPMSG_VIRTIO
> -       select CRYPTO_DEV_VIRTIO
> -       select VIRTIO_INPUT
>         select POWER_RESET_SYSCON
>         select POWER_RESET_SYSCON_POWEROFF
>         select GOLDFISH
> diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
> index c8f084203067..2557c5372a25 100644
> --- a/arch/riscv/configs/defconfig
> +++ b/arch/riscv/configs/defconfig
> @@ -31,6 +31,7 @@ CONFIG_IP_PNP_BOOTP=y
>  CONFIG_IP_PNP_RARP=y
>  CONFIG_NETLINK_DIAG=y
>  CONFIG_NET_9P=y
> +CONFIG_NET_9P_VIRTIO=y
>  CONFIG_PCI=y
>  CONFIG_PCIEPORTBUS=y
>  CONFIG_PCI_HOST_GENERIC=y
> @@ -38,12 +39,15 @@ CONFIG_PCIE_XILINX=y
>  CONFIG_DEVTMPFS=y
>  CONFIG_DEVTMPFS_MOUNT=y
>  CONFIG_BLK_DEV_LOOP=y
> +CONFIG_VIRTIO_BLK=y
>  CONFIG_BLK_DEV_SD=y
>  CONFIG_BLK_DEV_SR=y
> +CONFIG_SCSI_VIRTIO=y
>  CONFIG_ATA=y
>  CONFIG_SATA_AHCI=y
>  CONFIG_SATA_AHCI_PLATFORM=y
>  CONFIG_NETDEVICES=y
> +CONFIG_VIRTIO_NET=y
>  CONFIG_MACB=y
>  CONFIG_E1000E=y
>  CONFIG_R8169=y
> @@ -54,13 +58,16 @@ CONFIG_SERIAL_8250_CONSOLE=y
>  CONFIG_SERIAL_OF_PLATFORM=y
>  CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
>  CONFIG_HVC_RISCV_SBI=y
> +CONFIG_VIRTIO_CONSOLE=y
>  CONFIG_HW_RANDOM=y
> +CONFIG_HW_RANDOM_VIRTIO=y
>  CONFIG_SPI=y
>  CONFIG_SPI_SIFIVE=y
>  # CONFIG_PTP_1588_CLOCK is not set
>  CONFIG_POWER_RESET=y
>  CONFIG_DRM=y
>  CONFIG_DRM_RADEON=y
> +CONFIG_DRM_VIRTIO_GPU=y
>  CONFIG_FRAMEBUFFER_CONSOLE=y
>  CONFIG_USB=y
>  CONFIG_USB_XHCI_HCD=y
> @@ -74,6 +81,12 @@ CONFIG_USB_UAS=y
>  CONFIG_MMC=y
>  CONFIG_MMC_SPI=y
>  CONFIG_RTC_CLASS=y
> +CONFIG_VIRTIO_PCI=y
> +CONFIG_VIRTIO_BALLOON=y
> +CONFIG_VIRTIO_INPUT=y
> +CONFIG_VIRTIO_MMIO=y
> +CONFIG_RPMSG_CHAR=y
> +CONFIG_RPMSG_VIRTIO=y
>  CONFIG_EXT4_FS=y
>  CONFIG_EXT4_FS_POSIX_ACL=y
>  CONFIG_AUTOFS4_FS=y
> @@ -88,16 +101,17 @@ CONFIG_NFS_V4_2=y
>  CONFIG_ROOT_NFS=y
>  CONFIG_9P_FS=y
>  CONFIG_CRYPTO_USER_API_HASH=y
> +CONFIG_CRYPTO_DEV_VIRTIO=y
>  CONFIG_PRINTK_TIME=y
>  CONFIG_DEBUG_FS=y
>  CONFIG_DEBUG_PAGEALLOC=y
> +CONFIG_SCHED_STACK_END_CHECK=y
>  CONFIG_DEBUG_VM=y
>  CONFIG_DEBUG_VM_PGFLAGS=y
>  CONFIG_DEBUG_MEMORY_INIT=y
>  CONFIG_DEBUG_PER_CPU_MAPS=y
>  CONFIG_SOFTLOCKUP_DETECTOR=y
>  CONFIG_WQ_WATCHDOG=y
> -CONFIG_SCHED_STACK_END_CHECK=y
>  CONFIG_DEBUG_TIMEKEEPING=y
>  CONFIG_DEBUG_RT_MUTEXES=y
>  CONFIG_DEBUG_SPINLOCK=y
> diff --git a/arch/riscv/configs/rv32_defconfig b/arch/riscv/configs/rv32_defconfig
> index a844920a261f..0292879a9690 100644
> --- a/arch/riscv/configs/rv32_defconfig
> +++ b/arch/riscv/configs/rv32_defconfig
> @@ -31,6 +31,7 @@ CONFIG_IP_PNP_BOOTP=y
>  CONFIG_IP_PNP_RARP=y
>  CONFIG_NETLINK_DIAG=y
>  CONFIG_NET_9P=y
> +CONFIG_NET_9P_VIRTIO=y
>  CONFIG_PCI=y
>  CONFIG_PCIEPORTBUS=y
>  CONFIG_PCI_HOST_GENERIC=y
> @@ -38,12 +39,15 @@ CONFIG_PCIE_XILINX=y
>  CONFIG_DEVTMPFS=y
>  CONFIG_DEVTMPFS_MOUNT=y
>  CONFIG_BLK_DEV_LOOP=y
> +CONFIG_VIRTIO_BLK=y
>  CONFIG_BLK_DEV_SD=y
>  CONFIG_BLK_DEV_SR=y
> +CONFIG_SCSI_VIRTIO=y
>  CONFIG_ATA=y
>  CONFIG_SATA_AHCI=y
>  CONFIG_SATA_AHCI_PLATFORM=y
>  CONFIG_NETDEVICES=y
> +CONFIG_VIRTIO_NET=y
>  CONFIG_MACB=y
>  CONFIG_E1000E=y
>  CONFIG_R8169=y
> @@ -54,11 +58,14 @@ CONFIG_SERIAL_8250_CONSOLE=y
>  CONFIG_SERIAL_OF_PLATFORM=y
>  CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
>  CONFIG_HVC_RISCV_SBI=y
> +CONFIG_VIRTIO_CONSOLE=y
>  CONFIG_HW_RANDOM=y
> +CONFIG_HW_RANDOM_VIRTIO=y
>  # CONFIG_PTP_1588_CLOCK is not set
>  CONFIG_POWER_RESET=y
>  CONFIG_DRM=y
>  CONFIG_DRM_RADEON=y
> +CONFIG_DRM_VIRTIO_GPU=y
>  CONFIG_FRAMEBUFFER_CONSOLE=y
>  CONFIG_USB=y
>  CONFIG_USB_XHCI_HCD=y
> @@ -70,6 +77,12 @@ CONFIG_USB_OHCI_HCD_PLATFORM=y
>  CONFIG_USB_STORAGE=y
>  CONFIG_USB_UAS=y
>  CONFIG_RTC_CLASS=y
> +CONFIG_VIRTIO_PCI=y
> +CONFIG_VIRTIO_BALLOON=y
> +CONFIG_VIRTIO_INPUT=y
> +CONFIG_VIRTIO_MMIO=y
> +CONFIG_RPMSG_CHAR=y
> +CONFIG_RPMSG_VIRTIO=y
>  CONFIG_EXT4_FS=y
>  CONFIG_EXT4_FS_POSIX_ACL=y
>  CONFIG_AUTOFS4_FS=y
> @@ -84,16 +97,17 @@ CONFIG_NFS_V4_2=y
>  CONFIG_ROOT_NFS=y
>  CONFIG_9P_FS=y
>  CONFIG_CRYPTO_USER_API_HASH=y
> +CONFIG_CRYPTO_DEV_VIRTIO=y
>  CONFIG_PRINTK_TIME=y
>  CONFIG_DEBUG_FS=y
>  CONFIG_DEBUG_PAGEALLOC=y
> +CONFIG_SCHED_STACK_END_CHECK=y
>  CONFIG_DEBUG_VM=y
>  CONFIG_DEBUG_VM_PGFLAGS=y
>  CONFIG_DEBUG_MEMORY_INIT=y
>  CONFIG_DEBUG_PER_CPU_MAPS=y
>  CONFIG_SOFTLOCKUP_DETECTOR=y
>  CONFIG_WQ_WATCHDOG=y
> -CONFIG_SCHED_STACK_END_CHECK=y
>  CONFIG_DEBUG_TIMEKEEPING=y
>  CONFIG_DEBUG_RT_MUTEXES=y
>  CONFIG_DEBUG_SPINLOCK=y
> -- 
> 2.17.1
> 
>