Re: [PATCH V3 16/19] virtio-pci: introduce modern device module

Hi Jason,

On Mon, 4 Jan 2021 at 12:28, Jason Wang jasowang@redhat.com wrote:

Signed-off-by: Jason Wang jasowang@redhat.com

drivers/virtio/Kconfig | 10 +- drivers/virtio/Makefile | 1 + drivers/virtio/virtio_pci_common.h | 27 +- drivers/virtio/virtio_pci_modern.c | 617 ------------------------- drivers/virtio/virtio_pci_modern_dev.c | 599 ++++++++++++++++++++++++ include/linux/virtio_pci_modern.h | 111 +++++ 6 files changed, 721 insertions(+), 644 deletions(-) create mode 100644 drivers/virtio/virtio_pci_modern_dev.c create mode 100644 include/linux/virtio_pci_modern.h

diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig index 7b41130d3f35..6b9b81f4b8c2 100644 --- a/drivers/virtio/Kconfig +++ b/drivers/virtio/Kconfig @@ -12,6 +12,14 @@ config ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS This option is selected if the architecture may need to enforce VIRTIO_F_ACCESS_PLATFORM

+config VIRTIO_PCI_MODERN

•   tristate "Modern Virtio PCI Device"
  

•   depends on PCI
  

•   help
  

•     Modern PCI device implementation. This module implements the
  

•     basic probe and control for devices which are based on modern
  

•     PCI device with possible vendor specific extensions.
  

menuconfig VIRTIO_MENU bool "Virtio drivers" default y @@ -20,7 +28,7 @@ if VIRTIO_MENU

config VIRTIO_PCI tristate "PCI driver for virtio devices"

•   depends on PCI
  

•   depends on VIRTIO_PCI_MODERN
  

While booting Linux next tag 20210208 kernel on qemu_arm64 and qemu_arm mount rootfs failed. The root cause seems to be due to missing configs CONFIG_VIRTIO_PCI=y CONFIG_VIRTIO_PCI_LEGACY=y

Reported-by: Naresh Kamboju naresh.kamboju@linaro.org

Then I have to force to enable this MODERN config CONFIG_VIRTIO_PCI_MODERN=y and which enabled CONFIG_VIRTIO_PCI=y CONFIG_VIRTIO_PCI_LEGACY=y

and the qemu_arm64 and qemu_arm boot pass.

New build link, https://builds.tuxbuild.com/1oEse4EFsoQr1FkKBfiLmhMCe7j/