[coreboot-gerrit] [S] Change in coreboot[main]: vboot: add VBOOT_X86_SSE2_ACCELERATION config

[Jérémy Compostella (Code Review)]

Attention is currently required from: Julius Werner, Yu-Ping Wu.

Jérémy Compostella has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/79289?usp=email )

Change subject: vboot: add VBOOT_X86_SSE2_ACCELERATION config
......................................................................

vboot: add VBOOT_X86_SSE2_ACCELERATION config

Add `VBOOT_X86_SSE2_ACCELERATION' Kconfig option to enable SSE2
instruction set implementation of modulus exponentiation which is part
of the RSA signature verification process.

BUG=b:312709384
TEST=Able to use SSE2 accelerated implementation on rex0

Change-Id: Ib6e39eb9f592f36ad3dca76c8eaf2fe334704265
Signed-off-by: Jeremy Compostella 
---
M src/security/vboot/Kconfig
M src/security/vboot/Makefile.inc
2 files changed, 11 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/79289/1

diff --git a/src/security/vboot/Kconfig b/src/security/vboot/Kconfig
index 2d5b20f..295f8b8 100644
--- a/src/security/vboot/Kconfig
+++ b/src/security/vboot/Kconfig
@@ -292,6 +292,15 @@
      Use sha256msg1, sha256msg2, sha256rnds2 instruction to accelerate
      SHA hash calculation in vboot.

+config VBOOT_X86_SSE2_ACCELERATION
+	bool "Use SSE2 instructions for RSA signature verification"
+	default n
+	depends on ARCH_X86
+	help
+	  Use paddq, pmuludq, psrlq, punpckldq and punpcklqdq SSE2
+	  instructions to accelerate the modulus exponentiation which
+	  is part of the RSA signature verification process.
+
 config VBOOT_ARMV8_CE_SHA256_ACCELERATION
    bool "Use ARMv8 Crypto Extension for sha256 hash calculation"
    default y if CHROMEOS
diff --git a/src/security/vboot/Makefile.inc b/src/security/vboot/Makefile.inc
index 1b3568a..af87261 100644
--- a/src/security/vboot/Makefile.inc
+++ b/src/security/vboot/Makefile.inc
@@ -30,6 +30,8 @@
    EC_EFS="$(CONFIG_VBOOT_EC_EFS)" \
    X86_SHA_EXT="$(if $(CONFIG_ARCH_$(call toupper,$(1))_X86_32)$(CONFIG_ARCH_$(call toupper,$(1))_X86_64),$\
    		$(CONFIG_VBOOT_X86_SHA256_ACCELERATION))" \
+	X86_SSE2_INSTR="$(if $(CONFIG_ARCH_$(call toupper,$(1))_X86_32)$(CONFIG_ARCH_$(call toupper,$(1))_X86_64),$\
+			$(CONFIG_VBOOT_X86_SSE2_ACCELERATION))" \
    ARMV8_CRYPTO_EXT="$(if $(CONFIG_ARCH_$(call toupper,$(1))_ARMV8_64),$$(CONFIG_VBOOT_ARMV8_CE_SHA256_ACCELERATION))" \
    $(MAKE) -C $(VBOOT_SOURCE) \
    	BUILD=$$(abspath $$(dir $$(VBOOT_LIB_$(1)))) \