diff mbox series

[5/8] RFC: drivers/video/rockchip/rk_vop.c: Reserve efi fb memory

Message ID 20200925183856.548086571@rtp-net.org
State RFC
Delegated to: Anatolij Gustschin
Headers show
Series RFC: Pinebook pro EDP support | expand

Commit Message

Arnaud Patard (Rtp) Sept. 25, 2020, 6:36 p.m. UTC 
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>
diff mbox series

Patch

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);
 
 	/*