[S] Change in coreboot[main]: vboot: add VBOOT_X86_RSA_ACCELERATION config

[Yu-Ping Wu (Code Review)]

Yu-Ping Wu has submitted this change. ( https://review.coreboot.org/c/coreboot/+/79289?usp=email )

(

5 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: vboot: add VBOOT_X86_RSA_ACCELERATION config
......................................................................

vboot: add VBOOT_X86_RSA_ACCELERATION config

Add `VBOOT_X86_RSA_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 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79289
Reviewed-by: Julius Werner 
Reviewed-by: Yu-Ping Wu 
Tested-by: build bot (Jenkins) 
---
M src/security/vboot/Kconfig
M src/security/vboot/Makefile.inc
2 files changed, 15 insertions(+), 0 deletions(-)

Approvals:
  Yu-Ping Wu: Looks good to me, approved
  Julius Werner: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/security/vboot/Kconfig b/src/security/vboot/Kconfig
index 9d90d1e..56e94d5 100644
--- a/src/security/vboot/Kconfig
+++ b/src/security/vboot/Kconfig
@@ -301,6 +301,15 @@
      Use sha256msg1, sha256msg2, sha256rnds2 instruction to accelerate
      SHA hash calculation in vboot.

+config VBOOT_X86_RSA_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 fadc673..1689efb 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),$\
    		$(CONFIG_VBOOT_X86_SHA256_ACCELERATION))" \
+	VB2_X86_RSA_ACCELERATION="$(if $(CONFIG_ARCH_$(call toupper,$(1))_X86_32)$(CONFIG_ARCH_$(call toupper,$(1))_X86_64),$\
+			$(CONFIG_VBOOT_X86_RSA_ACCELERATION))" \
    ARMV8_CRYPTO_EXT="$(if $(CONFIG_ARCH_$(call toupper,$(1))_ARMV8_64),$$(CONFIG_VBOOT_ARMV8_CE_SHA256_ACCELERATION))" \
    $(MAKE) -C $(VBOOT_SOURCE) \
    	BUILD=$$(abspath $$(dir $$(VBOOT_LIB_$(1)))) \
@@ -129,6 +131,10 @@

ramstage-$(CONFIG_SOC_AMD_GFX_CACHE_VBIOS_IN_FMAP) += vbios_cache_hash_tpm.c

+ifeq ($(CONFIG_VBOOT_X86_RSA_ACCELERATION),y)
+CPPFLAGS_common += -DVB2_X86_RSA_ACCELERATION
+endif
+
 ifeq ($(CONFIG_VBOOT_SEPARATE_VERSTAGE),y)

$(eval $(call vboot-for-stage,verstage))