Change in coreboot[master]: vboot: add X86_SHA_EXT config

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/55611 )

Change subject: vboot: add X86_SHA_EXT config
......................................................................

vboot: add X86_SHA_EXT config

Add Kconfig option for X86_SHA_EXT, which will use x86-sha extension for
SHA256 instead of software implementation.

TEST=Able to call vb2ex_hwcrypto_digest_init() and perform SHA
using HW crypto engine.

Change-Id: Idc8be8711c69f4ebc489cd37cc3749c0b257c610
Signed-off-by: Subrata Banik 
---
M src/security/vboot/Kconfig
M src/security/vboot/Makefile.inc
2 files changed, 8 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/11/55611/1

diff --git a/src/security/vboot/Kconfig b/src/security/vboot/Kconfig
index 0368758..d743de9 100644
--- a/src/security/vboot/Kconfig
+++ b/src/security/vboot/Kconfig
@@ -274,6 +274,13 @@
      software sync needs to also support it. This setting tells vboot to
      perform EFS software sync.

+config X86_SHA_EXT
+	bool "Use sha extension for sha256 hash calculation"
+	default n
+	help
+	  Use sha256msg1, sha256msg2, sha256rnds2 instruction to accelerate
+	  SHA hash calculation in vboot.
+
 menu "GBB configuration"

config GBB_HWID
diff --git a/src/security/vboot/Makefile.inc b/src/security/vboot/Makefile.inc
index 47830f3..5eea61d 100644
--- a/src/security/vboot/Makefile.inc
+++ b/src/security/vboot/Makefile.inc
@@ -28,6 +28,7 @@
    CC="$$(CC_$(1))" \
    CFLAGS="$$(VBOOT_CFLAGS_$(1))" VBOOT2="y" \
    EC_EFS="$(CONFIG_VBOOT_EC_EFS)" \
+	X86_SHA_EXT="$(CONFIG_X86_SHA_EXT)" \
    $(MAKE) -C $(VBOOT_SOURCE) \
    	BUILD=$$(abspath $$(dir $$(VBOOT_LIB_$(1)))) \
    	V=$(V) \