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53 lines
2 KiB
Diff
53 lines
2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Robbie Harwood <rharwood@redhat.com>
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Date: Fri, 13 Jan 2023 12:36:29 -0500
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Subject: [PATCH] Fix prefix and root on ppc64le CDs
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CHRP requires grub at /boot/grub. On CDs, this means any other prefix
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will be invalid. In particular, a distro grub might prefer /grub2 - but
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prefix is hardcoded into the signed core.elf, and will always be wrong
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here.
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Also work around a conflict between OF naming and that used by
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part_msdos: on CDs, we always want the raw device. This fixes an issue
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where grub would successfully load the menu from an image, but then
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produce the error:
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error: ../../grub-core/net/net.c:1552:disk `ieee1275/cdrom,0' not found.
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and fail to boot further.
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Signed-off-by: Robbie Harwood <rharwood@redhat.com>
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(cherry picked from commit 68e5981a5e808a32350aca4a2414717fa4605ca0)
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---
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grub-core/kern/main.c | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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diff --git a/grub-core/kern/main.c b/grub-core/kern/main.c
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index e94a2f78fb..ab06033534 100644
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--- a/grub-core/kern/main.c
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+++ b/grub-core/kern/main.c
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@@ -278,6 +278,23 @@ grub_set_prefix_and_root (void)
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}
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grub_env_set ("root", device);
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+
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+#ifdef __powerpc__
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+ /* When booting from a CD, if part_msdos is enabled, grub will detect
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+ and create access points starting at (ieee1275/cdrom,msdos1).
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+ However, the device detection and OF name transformation will produce
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+ a device named (ieee1275/cdrom,0) - i.e., missing the msdos and also
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+ differently indexed. Furthermore, CHRP mandates boot/grub as prefix,
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+ but our signed images are built with /grub2 to reflect installed
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+ systems. Just ignore both messes.
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+ */
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+ if (!grub_strncmp (device[0] == '(' ? device + 1 : device,
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+ "ieee1275/cdrom", grub_strlen ("ieee1275/cdrom")))
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+ {
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+ grub_env_set ("prefix", "/boot/grub");
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+ grub_env_set ("root", "ieee1275/cdrom");
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+ }
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+#endif
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}
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grub_free (device);
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