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xen: Init memory regions for PVH

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Add all usable memory regions to grub memory management and add the
needed mmap iterate code, which will be used by grub core (e.g.
grub-core/lib/relocator.c or grub-core/mmap/mmap.c).

As we are running in 32-bit mode don't add memory above 4GB.

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 13:11:42 +01:00 committed by Daniel Kiper
parent 4c9b4a7c92
commit 1d2473a024
1 changed files with 35 additions and 0 deletions
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35
grub-core/kern/i386/xen/pvh.c
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@ -241,6 +241,30 @@ grub_xen_set_mmap (void)
(grub_uint32_t) (&memmap), 0, 0, 0, 0);
}
static void
grub_xen_mm_init_regions (void)
{
grub_uint64_t modend, from, to;
unsigned int i;
modend = grub_modules_get_end ();
for (i = 0; i < nr_map_entries; i++)
{
if (map[i].type != GRUB_MEMORY_AVAILABLE)
continue;
from = map[i].addr;
to = from + map[i].len;
if (from < modend)
from = modend;
if (from >= to || from >= (1ULL << 32))
continue;
if (to > (1ULL << 32))
to = 1ULL << 32;
grub_mm_init_region ((void *) (grub_addr_t) from, to - from);
}
}
static grub_uint64_t
grub_xen_find_page (grub_uint64_t start)
{
@ -325,10 +349,21 @@ grub_xen_setup_pvh (void)
(void *) par);
grub_xen_set_mmap ();
grub_xen_mm_init_regions ();
grub_rsdp_addr = pvh_start_info->rsdp_paddr;
}
grub_err_t
grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
{
unsigned int i;
for (i = 0; i < nr_map_entries; i++)
{
if (map[i].len && hook (map[i].addr, map[i].len, map[i].type, hook_data))
break;
}
return GRUB_ERR_NONE;
}