[patch v2 04/10] drivers/video/rockchip/rk_vop.c: Reserve efi fb memory

Arnaud Patard
2020-10-27T13:21:35Z

When booting with EFI and graphics, the memory used for framebuffer
has to be reserved, otherwise it may leads to kernel memory
overwrite.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Index: u-boot/drivers/video/rockchip/rk_vop.c
===================================================================
--- u-boot.orig/drivers/video/rockchip/rk_vop.c
+++ u-boot/drivers/video/rockchip/rk_vop.c
@@ -20,6 +20,8 @@
#include <asm/arch-rockchip/vop_rk3288.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
+#include <efi.h>
+#include <efi_loader.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <power/regulator.h>
@@ -394,6 +396,13 @@ int rk_vop_probe(struct udevice *dev)
if (!(gd->flags & GD_FLG_RELOC))
return 0;

+ plat->base = gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - plat->size;
+
+#if defined(CONFIG_EFI_LOADER)
+ debug("Adding to EFI map %d @ %lx\n", plat->size, plat->base);
+ efi_add_memory_map(plat->base, plat->size, EFI_RESERVED_MEMORY_TYPE);
+#endif
+
priv->regs = (struct rk3288_vop *)dev_read_addr(dev);

/*