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bootmeth_efi: Support PXE booting

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Finish off the implementation so it is possible to boot an EFI app over
a network.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2025-01-23 15:07:24 -07:00 • committed by Heinrich Schuchardt
parent a2338955fc
commit 21de624eb8
2 changed files with 5 additions and 15 deletions
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15
boot/bootmeth_efi.c
View file

@ -210,6 +210,7 @@ static int distro_efi_read_bootflow_net(struct bootflow *bflow)
if (size <= 0)
return log_msg_ret("sz", -EINVAL);
bflow->size = size;
bflow->buf = map_sysmem(addr, size);
/* bootfile should be setup by dhcp */
bootfile_name = env_get("bootfile");
@ -219,10 +220,6 @@ static int distro_efi_read_bootflow_net(struct bootflow *bflow)
if (!bflow->fname)
return log_msg_ret("fi0", -ENOMEM);
/* do the hideous EFI hack */
efi_set_bootdev("Net", "", bflow->fname, map_sysmem(addr, 0),
bflow->size);
/* read the DT file also */
fdt_addr_str = env_get("fdt_addr_r");
if (!fdt_addr_str)
@ -296,16 +293,6 @@ static int distro_efi_boot(struct udevice *dev, struct bootflow *bflow)
if (bflow->flags & ~BOOTFLOWF_USE_BUILTIN_FDT)
fdt = bflow->fdt_addr;
} else {
/*
* This doesn't actually work for network devices:
*
* do_bootefi_image() No UEFI binary known at 0x02080000
*
* But this is the same behaviour for distro boot, so it can be
* fixed here.
*/
fdt = env_get_hex("fdt_addr_r", 0);
}
if (efi_bootflow_run(bflow))

5
lib/efi_loader/efi_bootbin.c
View file

@ -302,6 +302,9 @@ static const char *calc_dev_name(struct bootflow *bflow)
media_dev = dev_get_parent(bflow->dev);
if (!bflow->blk) {
if (device_get_uclass_id(media_dev) == UCLASS_ETH)
return "Net";
log_err("Cannot boot EFI app on media '%s'\n",
dev_get_uclass_name(media_dev));
@ -342,7 +345,7 @@ efi_status_t efi_bootflow_run(struct bootflow *bflow)
ret = calculate_paths(dev_name, devnum_str, bflow->fname, &device,
&image);
if (ret)
return ret;
return EFI_UNSUPPORTED;
if (bflow->flags & BOOTFLOWF_USE_BUILTIN_FDT) {
log_debug("Booting with built-in fdt\n");