[v4 2/7] arm: socfpga: soc64: Support Vendor Authorized Boot (VAB)

[Lim, Elly Siew Chin]

Hi Ley Foon,

> -----Original Message-----
> From: Tan, Ley Foon <ley.foon.tan at intel.com>
> Sent: Monday, March 1, 2021 9:56 AM
> To: Lim, Elly Siew Chin <elly.siew.chin.lim at intel.com>; u-boot at lists.denx.de
> Cc: Marek Vasut <marex at denx.de>; See, Chin Liang
> <chin.liang.see at intel.com>; Simon Goldschmidt
> <simon.k.r.goldschmidt at gmail.com>; Chee, Tien Fong
> <tien.fong.chee at intel.com>; Westergreen, Dalon
> <dalon.westergreen at intel.com>; Simon Glass <sjg at chromium.org>; Gan,
> Yau Wai <yau.wai.gan at intel.com>
> Subject: RE: [v4 2/7] arm: socfpga: soc64: Support Vendor Authorized Boot
> (VAB)
> 
> 
> 
> > -----Original Message-----
> > From: Lim, Elly Siew Chin <elly.siew.chin.lim at intel.com>
> > Sent: Saturday, February 27, 2021 12:11 AM
> > To: u-boot at lists.denx.de
> > Cc: Marek Vasut <marex at denx.de>; Tan, Ley Foon
> > <ley.foon.tan at intel.com>; See, Chin Liang <chin.liang.see at intel.com>;
> > Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>; Chee, Tien Fong
> > <tien.fong.chee at intel.com>; Westergreen, Dalon
> > <dalon.westergreen at intel.com>; Simon Glass <sjg at chromium.org>; Gan,
> > Yau Wai <yau.wai.gan at intel.com>; Lim, Elly Siew Chin
> > <elly.siew.chin.lim at intel.com>
> > Subject: [v4 2/7] arm: socfpga: soc64: Support Vendor Authorized Boot
> > (VAB)
> >
> > Vendor Authorized Boot is a security feature for authenticating the
> > images such as U-Boot, ARM trusted Firmware, Linux kernel, device tree
> > blob and etc loaded from FIT. After those images are loaded from FIT,
> > the VAB certificate and signature block appended at the end of each
> > image are sent to Secure Device Manager (SDM) for authentication.
> > U-Boot will validate the
> > SHA384 of the image against the SHA384 hash stored in the VAB
> > certificate before sending the image to SDM for authentication.
> >
> > Signed-off-by: Siew Chin Lim <elly.siew.chin.lim at intel.com>
> >
> > ---
> > v4:
> > - Move function 'board_fit_image_post_process' and 'board_prep_linux'
> to
> >   arch/arm/mach-socfpga/board.c
> >
> > v3:
> > - Add description for function 'socfpga_vendor_authentication'.
> > - Relocate vab certificate to first memory bank before trigger SMC call
> >   to send mailbox command because ATF only able to access first memory
> > bank.
> > - Report error instead of bypass the authentication in SPL if
> >   Secure Device Manager (SDM) does not support VAB.
> > - Print success string if VAB success.
> > - Replace #ifdef with if(IS_ENABLED(CONFIG_...)).
> > ---
> >  arch/arm/mach-socfpga/Kconfig                    |  15 ++
> >  arch/arm/mach-socfpga/Makefile                   |   2 +
> >  arch/arm/mach-socfpga/board.c                    |  43 +++++-
> >  arch/arm/mach-socfpga/include/mach/mailbox_s10.h |   1 +
> >  arch/arm/mach-socfpga/include/mach/secure_vab.h  |  63 ++++++++
> >  arch/arm/mach-socfpga/secure_vab.c               | 186
> > +++++++++++++++++++++++
> >  common/Kconfig.boot                              |   2 +-
> >  7 files changed, 307 insertions(+), 5 deletions(-)  create mode
> > 100644 arch/arm/mach-socfpga/include/mach/secure_vab.h
> >  create mode 100644 arch/arm/mach-socfpga/secure_vab.c
> >
> >  #include <common.h>
> > -#include <errno.h>
> > -#include <fdtdec.h>
> > -#include <init.h>
> > -#include <asm/arch/reset_manager.h>
> >  #include <asm/arch/clock_manager.h>
> >  #include <asm/arch/misc.h>
> > +#include <asm/arch/reset_manager.h>
> > +#include <asm/arch/secure_vab.h>
> >  #include <asm/io.h>
> > +#include <errno.h>
> > +#include <fdtdec.h>
> > +#include <hang.h>
> > +#include <image.h>
> > +#include <init.h>
> >  #include <log.h>
> >  #include <usb.h>
> >  #include <usb/dwc2_udc.h>
> > @@ -97,3 +100,35 @@ __weak int board_fit_config_name_match(const
> char
> > *name)
> >  	return 0;
> >  }
> >  #endif
> > +
> > +#if IS_ENABLED(CONFIG_SOCFPGA_SECURE_VAB_AUTH)
> > +void board_fit_image_post_process(void **p_image, size_t *p_size) {
> > +	if (socfpga_vendor_authentication(p_image, p_size))
> > +		hang();
> > +}
> > +
> > +void board_prep_linux(bootm_headers_t *images) {
> 
> Check CONFIG_SOCFPGA_SECURE_VAB_AUTH setting, then only include
> code below.
> 
> > +	if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
> > +		if
> > (!IS_ENABLED(CONFIG_SECURE_VAB_AUTH_ALLOW_NON_FIT_IMAGE)) {
> > +			/*
> > +			 * Ensure the OS is always booted from FIT and with
> > +			 * VAB signed certificate
> > +			 */
> > +			if (!images->fit_uname_cfg) {
> > +				printf("Please use FIT with VAB signed
> > images!\n");
> > +				hang();
> > +			}
> > +
> > +			env_set_hex("fdt_addr", (ulong)images->ft_addr);
> > +			debug("images->ft_addr = 0x%08lx\n",
> > (ulong)images->ft_addr);
> > +		}
> > +
> > +		if (IS_ENABLED(CONFIG_CADENCE_QSPI)) {
> > +			if (env_get("linux_qspi_enable"))
> > +
> > 	run_command(env_get("linux_qspi_enable"), 0);
> Can always run " linux_qspi_enable" command for all target SOC64? Then can
> remove linux_qspi_enable from BOOTCOMMAND.

board_prep_linux will only be called when we use "bootm" to boot to Linux. Only SOC64 VAB flow is using "bootm" now. We still need linux_qspi_enable in BOOTCOMMAND for ATF and non-ATF boot flow.

> 
> Regards
> Ley Foon