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lmb: consider EFI memory map

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Add reservations for all EFI memory areas that are not
EFI_CONVENTIONAL_MEMORY.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2023-01-04 01:36:14 +01:00
parent eff4440195
commit 06d514d77c
1 changed files with 36 additions and 0 deletions
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36
lib/lmb.c
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@ -7,7 +7,9 @@
*/
#include <common.h>
#include <efi_loader.h>
#include <image.h>
#include <mapmem.h>
#include <lmb.h>
#include <log.h>
#include <malloc.h>
@ -153,6 +155,37 @@ void arch_lmb_reserve_generic(struct lmb *lmb, ulong sp, ulong end, ulong align)
}
}
/**
* efi_lmb_reserve() - add reservations for EFI memory
*
* Add reservations for all EFI memory areas that are not
* EFI_CONVENTIONAL_MEMORY.
*
* @lmb: lmb environment
* Return: 0 on success, 1 on failure
*/
static __maybe_unused int efi_lmb_reserve(struct lmb *lmb)
{
struct efi_mem_desc *memmap = NULL, *map;
efi_uintn_t i, map_size = 0;
efi_status_t ret;
ret = efi_get_memory_map_alloc(&map_size, &memmap);
if (ret != EFI_SUCCESS)
return 1;
for (i = 0, map = memmap; i < map_size / sizeof(*map); ++map, ++i) {
if (map->type != EFI_CONVENTIONAL_MEMORY)
lmb_reserve(lmb,
map_to_sysmem((void *)(uintptr_t)
map->physical_start),
map->num_pages * EFI_PAGE_SIZE);
}
efi_free_pool(memmap);
return 0;
}
static void lmb_reserve_common(struct lmb *lmb, void *fdt_blob)
{
arch_lmb_reserve(lmb);
@ -160,6 +193,9 @@ static void lmb_reserve_common(struct lmb *lmb, void *fdt_blob)
if (CONFIG_IS_ENABLED(OF_LIBFDT) && fdt_blob)
boot_fdt_add_mem_rsv_regions(lmb, fdt_blob);
if (CONFIG_IS_ENABLED(EFI_LOADER))
efi_lmb_reserve(lmb);
}
/* Initialize the struct, add memory and call arch/board reserve functions */