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loader/linux: Support passing RSDP address via boot params 

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
View File

@ -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);

3
include/grub/i386/linux.h
View File

@ -210,8 +210,9 @@ struct linux_kernel_params
grub_uint32_t ist_command; /* 64 */
grub_uint32_t ist_event; /* 68 */
grub_uint32_t ist_perf_level; /* 6c */
grub_uint64_t acpi_rsdp_addr; /* 70 */
grub_uint8_t padding5[0x80 - 0x70];
grub_uint8_t padding5[0x80 - 0x78];
grub_uint8_t hd0_drive_info[0x10]; /* 80 */
grub_uint8_t hd1_drive_info[0x10]; /* 90 */