[PATCH 3/4] arm: layerscape: ppa: reserve SDRAM region for PPA

Sascha Hauer s.hauer at pengutronix.de
Thu Oct 19 04:27:26 PDT 2023

The region the PPA is stored may not be speculated into by the CPU.
We have reserve_sdram_region() for this purpose. With this the region
is mapped uncached with excute never bit set. Use this rather than

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
 arch/arm/mach-layerscape/ppa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-layerscape/ppa.c b/arch/arm/mach-layerscape/ppa.c
index 3fa73d555f..6c3fdff381 100644
--- a/arch/arm/mach-layerscape/ppa.c
+++ b/arch/arm/mach-layerscape/ppa.c
@@ -117,7 +117,7 @@ int ls1046a_ppa_init(resource_size_t ppa_start, resource_size_t ppa_size)
 	size_t ppa_fw_size;
 	int ret;
-	res = request_sdram_region("ppa", ppa_start, ppa_size);
+	res = reserve_sdram_region("ppa", ppa_start, ppa_size);
 	if (!res) {
 		pr_err("Cannot request SDRAM region %pa - %pa\n",
 		       &ppa_start, &ppa_end);

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