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loader/linux: Support passing RSDP address via boot params

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Xen PVH guests will have the RSDP at an arbitrary address. Support that
by passing the RSDP address via the boot parameters to Linux.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Hans van Kranenburg <hans@knorrie.org>
This commit is contained in:
Juergen Gross 2018-12-07 13:11:30 +01:00 • committed by Daniel Kiper
parent 9118effd1b
commit d170be42f1
2 changed files with 6 additions and 1 deletions
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4
grub-core/loader/i386/linux.c
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@ -508,6 +508,10 @@ grub_linux_boot (void)
}
}
#ifdef GRUB_KERNEL_USE_RSDP_ADDR
linux_params.acpi_rsdp_addr = grub_le_to_cpu64 (grub_rsdp_addr);
#endif
mmap_size = find_mmap_size ();
/* Make sure that each size is aligned to a page boundary. */
cl_offset = ALIGN_UP (mmap_size + sizeof (linux_params), 4096);