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distro_bootcmd: refactor virtio to support PCI block devices 

Starting libvirt v5.3.0 with QEMU 4.0.0 use of PCI is automatic
and thus storage is connected via PCI, which is not visible to
U-Boot out-of-the-box.

Refactor to do "pci enum" followed by "virtio scan" to see PCI
connected storage, and allow bootloader to load kernel and
initramfs images.

Tested with Fedora/RISCV using releases: libvirt 5.4.0 & 5.5.0,
QEMU 4.0.0 and U-Boot 2019.07 RC4.

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
This commit is contained in:
David Abdurachmanov 2019-07-22 11:38:11 +03:00 committed by Tom Rini
parent 26557d1025
commit f0ebcf8c17
1 changed files with 21 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
include/config_distro_bootcmd.h
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@ -254,11 +254,11 @@
#endif
#if defined(CONFIG_DM_PCI)
#define BOOTENV_RUN_NET_PCI_ENUM "run boot_net_pci_enum; "
#define BOOTENV_RUN_PCI_ENUM "run boot_pci_enum; "
#define BOOTENV_SHARED_PCI \
"boot_net_pci_enum=pci enum\0"
"boot_pci_enum=pci enum\0"
#else
#define BOOTENV_RUN_NET_PCI_ENUM
#define BOOTENV_RUN_PCI_ENUM
#define BOOTENV_SHARED_PCI
#endif
@ -281,10 +281,24 @@
#endif
#ifdef CONFIG_CMD_VIRTIO
#define BOOTENV_SHARED_VIRTIO BOOTENV_SHARED_BLKDEV(virtio)
#define BOOTENV_RUN_VIRTIO_INIT "run virtio_init; "
#define BOOTENV_SET_VIRTIO_NEED_INIT "virtio_need_init=; "
#define BOOTENV_SHARED_VIRTIO \
"virtio_init=" \
"if ${virtio_need_init}; then " \
"virtio_need_init=false; " \
"virtio scan; " \
"fi\0" \
\
"virtio_boot=" \
BOOTENV_RUN_PCI_ENUM \
BOOTENV_RUN_VIRTIO_INIT \
BOOTENV_SHARED_BLKDEV_BODY(virtio)
#define BOOTENV_DEV_VIRTIO BOOTENV_DEV_BLKDEV
#define BOOTENV_DEV_NAME_VIRTIO BOOTENV_DEV_NAME_BLKDEV
#else
#define BOOTENV_RUN_VIRTIO_INIT
#define BOOTENV_SET_VIRTIO_NEED_INIT
#define BOOTENV_SHARED_VIRTIO
#define BOOTENV_DEV_VIRTIO \
BOOT_TARGET_DEVICES_references_VIRTIO_without_CONFIG_CMD_VIRTIO
@ -350,7 +364,7 @@
#define BOOTENV_DEV_DHCP(devtypeu, devtypel, instance) \
"bootcmd_dhcp=" \
BOOTENV_RUN_NET_USB_START \
BOOTENV_RUN_NET_PCI_ENUM \
BOOTENV_RUN_PCI_ENUM \
"if dhcp ${scriptaddr} ${boot_script_dhcp}; then " \
"source ${scriptaddr}; " \
"fi;" \
@ -369,7 +383,7 @@
#define BOOTENV_DEV_PXE(devtypeu, devtypel, instance) \
"bootcmd_pxe=" \
BOOTENV_RUN_NET_USB_START \
BOOTENV_RUN_NET_PCI_ENUM \
BOOTENV_RUN_PCI_ENUM \
"dhcp; " \
"if pxe get; then " \
"pxe boot; " \
@ -465,6 +479,7 @@
"distro_bootcmd=" BOOTENV_SET_SCSI_NEED_INIT \
BOOTENV_SET_NVME_NEED_INIT \
BOOTENV_SET_IDE_NEED_INIT \
BOOTENV_SET_VIRTIO_NEED_INIT \
"for target in ${boot_targets}; do " \
"run bootcmd_${target}; " \
"done\0"