From b43d7aa09b3c91fb6b652306db2ac13e1459c497 Mon Sep 17 00:00:00 2001
From: Colin Percival <cperciva@FreeBSD.org>
Date: Thu, 16 Sep 2021 09:22:42 -0700
Subject: [PATCH] EC2: Default to UEFI booting

This reduces the FreeBSD boot time by approximately 5 seconds,
roughly equally divided betwenn two factors:
* Disk I/O is faster in the EFI loader since it can perform larger
I/Os.  (The BIOS loader is limited due to the use of bounce buffers
in sub-1M memory.)
* The EFI console is much faster than the VGA console.

Note however that not all EC2 instance types support UEFI; as a
general rule the newer instances (based on Amazon's "Nitro" platform)
support UEFI but the older instances (based on Xen) do not.

X-MFC:	TBD based on tradeoff between performance and compatibility
Relnotes:	yes
Sponsored by:	https://www.patreon.com/cperciva
---
 release/Makefile.ec2 | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/release/Makefile.ec2 b/release/Makefile.ec2
index ce21d93c37ad..b29f54715fb3 100644
--- a/release/Makefile.ec2
+++ b/release/Makefile.ec2
@@ -25,12 +25,8 @@ SSMOPTS=	--ssm-name ${SSMPREFIX}/${TARGET_ARCH:S/aarch64/arm64/}/base/ufs/${REVI
 EC2ARCH=	--${TARGET_ARCH:S/aarch64/arm64/}
 .endif
 .if !defined(AMIBOOTMETHOD)
-.if ${TARGET_ARCH} == "amd64"
-AMIBOOTMETHOD=	BIOS
-.else
 AMIBOOTMETHOD=	UEFI
 .endif
-.endif
 .if ${AMIBOOTMETHOD} == "UEFI" && ${TARGET_ARCH} == "amd64"
 BOOTMODEOPT=	--uefi
 .endif