plat/kvm/x86: Insert legacy regions in linux boot entry

We use this region to write to the VGA console and Firecracker also
keeps this area clear. This ensures that the region is also mapped in
Unikraft.

Signed-off-by: Marco Schlumpp <marco@unikraft.io>
Reviewed-by: Michalis Pappas <michalis@unikraft.io>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Closes: #848

diff --git a/plat/kvm/x86/lxboot.c b/plat/kvm/x86/lxboot.c
index 130136fd55ef3d1d15989d5b039d7bf1e43a78a3..b9e37d4cda33873f60096886323f67c7fe81b0fe 100644 (file)
--- a/plat/kvm/x86/lxboot.c
+++ b/plat/kvm/x86/lxboot.c
@@ -135,6 +135,11 @@ lxboot_init_mem(struct ukplat_bootinfo *bi, struct lxboot_params *bp)
                        lxboot_crash(rc, "Unable to add ram mapping");
 
        }
+
+       rc = ukplat_memregion_list_insert_legacy_hi_mem(&bi->mrds);
+       if (unlikely(rc < 0))
+               lxboot_crash(rc,
+                            "Failed to insert legacy high memory region\n");
 }
 
 void lxboot_entry(struct lcpu *lcpu, struct lxboot_params *bp)