[PATCH 4.4 29/56] x86/boot: Add missing bootparam that breaks boot on some platforms

From: Greg Kroah-Hartman
Date: Thu Sep 19 2019 - 18:22:45 EST


From: Corey Minyard <cminyard@xxxxxxxxxx>

Change

a90118c445cc x86/boot: Save fields explicitly, zero out everything else

modified the way boot parameters were saved on x86. When this was
backported, e820_table didn't exists, and that change was dropped.
Unfortunately, e820_table did exist, it was just named e820_map
in this kernel version.

This was breaking booting on a Supermicro Super Server/A2SDi-2C-HLN4F
with a Denverton CPU. Adding e820_map to the saved boot params table
fixes the issue.

Cc: <stable@xxxxxxxxxxxxxxx> # 4.9.x, 4.4.x
Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
arch/x86/include/asm/bootparam_utils.h | 1 +
1 file changed, 1 insertion(+)

--- a/arch/x86/include/asm/bootparam_utils.h
+++ b/arch/x86/include/asm/bootparam_utils.h
@@ -71,6 +71,7 @@ static void sanitize_boot_params(struct
BOOT_PARAM_PRESERVE(edd_mbr_sig_buf_entries),
BOOT_PARAM_PRESERVE(edd_mbr_sig_buffer),
BOOT_PARAM_PRESERVE(hdr),
+ BOOT_PARAM_PRESERVE(e820_map),
BOOT_PARAM_PRESERVE(eddbuf),
};