Hi Penny,
On 13/01/2023 05:28, Penny Zheng wrote:
From: Wei Chen <wei.c...@arm.com>
Currently, ARM_EFI will mandatorily selected by Arm64.
Even if the user knows for sure that their images will not
start in the EFI environment, they can't disable the EFI
support for Arm64. This means there will be about 3K lines
unused code in their images.
So in this patch, we make ARM_EFI selectable for Arm64, and
based on that, we can use CONFIG_ARM_EFI to gate the EFI
specific code in head.S for those images that will not be
booted in EFI environment.
Signed-off-by: Wei Chen <wei.c...@arm.com>
Your signed-off-by is missing.
---
v1 -> v2:
1. New patch
---
xen/arch/arm/Kconfig | 10 ++++++++--
xen/arch/arm/arm64/head.S | 15 +++++++++++++--
2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index 239d3aed3c..ace7178c9a 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -7,7 +7,6 @@ config ARM_64
def_bool y
depends on !ARM_32
select 64BIT
- select ARM_EFI
select HAS_FAST_MULTIPLY
config ARM
@@ -37,7 +36,14 @@ config ACPI
an alternative to device tree on ARM64.
config ARM_EFI
- bool
+ bool "UEFI boot service support"
+ depends on ARM_64
+ default y
+ help
+ This option provides support for boot services through
+ UEFI firmware. A UEFI stub is provided to allow Xen to
+ be booted as an EFI application. This is only useful for
+ Xen that may run on systems that have UEFI firmware.
I would drop the last sentence as this is implied with the rest of the
paragraph.
Cheers,
--
Julien Grall
