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libpayload: 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. This option is enabled on
CHROMEOS.

| modpow() function call | original on rex0 | SSE2 on rex0 |
|------------------------+------------------+--------------|
| depthcharge - step 1   |            0.547 |        0.288 |
| depthcharge - step 2   |            0.152 |        0.081 |
| depthcharge - step 3   |            0.164 |        0.079 |
|------------------------+------------------+--------------|
| Total (ms)             |            0.863 |        0.448 |

| modpow() function call | original on brya0 | SSE2 on rex0 |
|------------------------+-------------------+--------------|
| depthcharge - step 1   |             0.693 |        0.248 |
| depthcharge - step 2   |             0.172 |        0.065 |
| depthcharge - step 3   |             0.223 |        0.067 |
|------------------------+-------------------+--------------|
| Total (ms)             |             1.088 |         0.38 |

BUG=b:312709384
TEST=modular exponentiation is about twice faster on rex0 and brya0

Change-Id: I801ebd7839261c6bd07fb218e1e36a7108e219bf
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79290
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
This commit is contained in:
Jeremy Compostella 2023-11-27 15:01:28 -08:00 committed by Yu-Ping Wu
parent 00a9bc68fe
commit 3dcd0d98e4
2 changed files with 15 additions and 0 deletions
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10
payloads/libpayload/vboot/Kconfig
View File

@ -31,6 +31,16 @@ config VBOOT_X86_SHA_EXT
This option enables SHA256 implementation using x86 SHA processor extension
instructions: sha256msg1, sha256msg2, sha256rnds2.
config VBOOT_X86_RSA_ACCELERATION
bool "Use SSE2 instructions for RSA signature verification"
default y if CHROMEOS
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_SHA_ARMV8_CE
bool "SHA256 implementation using ARMv8 Crypto Extension"
default y if CHROMEOS

5
payloads/libpayload/vboot/Makefile.inc
View File

@ -29,6 +29,10 @@ ifeq ($(CONFIG_LP_ARCH_MOCK)$(VBOOT_FIRMWARE_ARCH-y),)
$(error vboot requires architecture to be set in the configuration)
endif
ifeq ($(CONFIG_LP_VBOOT_X86_RSA_ACCELERATION),y)
CPPFLAGS_common += -DVB2_X86_RSA_ACCELERATION
endif
$(VBOOT_FW_LIB): $(obj)/libpayload-config.h
@printf " MAKE $(subst $(obj)/,,$(@))\n"
+$(Q) FIRMWARE_ARCH="$(VBOOT_FIRMWARE_ARCH-y)" \
@ -37,6 +41,7 @@ $(VBOOT_FW_LIB): $(obj)/libpayload-config.h
$(MAKE) -C "$(VBOOT_SOURCE)" \
TPM2_MODE=$(call kconfig-to-binary, $(CONFIG_LP_VBOOT_TPM2_MODE)) \
X86_SHA_EXT=$(call kconfig-to-binary, $(CONFIG_LP_VBOOT_X86_SHA_EXT)) \
VB2_X86_RSA_ACCELERATION=$(call kconfig-to-binary, $(CONFIG_LP_VBOOT_X86_RSA_ACCELERATION)) \
ARMV8_CRYPTO_EXT=$(call kconfig-to-binary, $(CONFIG_LP_VBOOT_SHA_ARMV8_CE)) \
UNROLL_LOOPS=1 \
BUILD="$(VBOOT_BUILD_DIR)" \