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fdt: lmb: add reserved regions as no-overwrite

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The boot_fdt_add_mem_rsv_regions() function reserves the memreserve and
reserved-memory regions. These regions are being set with the LMB_NONE
flag which allows overwriting and re-using the regions. This was fine
earlier when the LMB memory map was local and not enforced
globally. But that is no longer the case. Mark these regions as
LMB_NOOVERWRITE so that they cannot be used.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reported-by: Vaishnav Achath <vaishnav.a@ti.com>
This commit is contained in:
Sughosh Ganu
2024-10-21 22:54:33 +05:30
committed by Tom Rini
parent c3cf0dc64f
commit 827dee587b
1 changed files with 2 additions and 2 deletions
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4
boot/image-fdt.c
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@@ -110,7 +110,7 @@ void boot_fdt_add_mem_rsv_regions(void *fdt_blob)
for (i = 0; i < total; i++) { for (i = 0; i < total; i++) {
if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0) if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
continue; continue;
boot_fdt_reserve_region(addr, size, LMB_NONE); boot_fdt_reserve_region(addr, size, LMB_NOOVERWRITE);
} }
/* process reserved-memory */ /* process reserved-memory */
@@ -122,7 +122,7 @@ void boot_fdt_add_mem_rsv_regions(void *fdt_blob)
ret = fdt_get_resource(fdt_blob, subnode, "reg", 0, ret = fdt_get_resource(fdt_blob, subnode, "reg", 0,
&res); &res);
if (!ret && fdtdec_get_is_enabled(fdt_blob, subnode)) { if (!ret && fdtdec_get_is_enabled(fdt_blob, subnode)) {
flags = LMB_NONE; flags = LMB_NOOVERWRITE;
if (fdtdec_get_bool(fdt_blob, subnode, if (fdtdec_get_bool(fdt_blob, subnode,
"no-map")) "no-map"))
flags = LMB_NOMAP; flags = LMB_NOMAP;