[PATCH v1 00/20] Enable ARM Trusted Firmware for U-Boot
Simon Goldschmidt
simon.k.r.goldschmidt at gmail.com
Tue Dec 3 16:10:07 CET 2019
On Tue, Dec 3, 2019 at 3:45 PM Ang, Chee Hong <chee.hong.ang at intel.com> wrote:
>
> > On Tue, Dec 3, 2019 at 2:37 AM Ang, Chee Hong <chee.hong.ang at intel.com>
> > wrote:
> > >
> > > > Am 02.12.2019 um 17:10 schrieb Ang, Chee Hong:
> > > > >> On Mon, Dec 2, 2019 at 4:18 PM Ang, Chee Hong
> > > > >> <chee.hong.ang at intel.com>
> > > > >> wrote:
> > > > >>>
> > > > >>>> On Mon, Dec 2, 2019 at 3:08 PM Ang, Chee Hong
> > > > >>>> <chee.hong.ang at intel.com>
> > > > >>>> wrote:
> > > > >>>>>
> > > > >>>>>> On Mon, Dec 2, 2019 at 2:38 PM Ang, Chee Hong
> > > > >>>>>> <chee.hong.ang at intel.com>
> > > > >>>>>> wrote:
> > > > >>>>>>>
> > > > >>>>>>>> On Mon, Dec 2, 2019 at 11:25 AM <chee.hong.ang at intel.com>
> > > > >> wrote:
> > > > >>>>>>>>>
> > > > >>>>>>>>> From: "Ang, Chee Hong" <chee.hong.ang at intel.com>
> > > > >>>>>>>>>
> > > > >>>>>>>>> New U-boot flow with ARM Trusted Firmware (ATF) support:
> > > > >>>>>>>>> SPL (EL3) -> ATF-BL31 (EL3) -> U-Boot Proper (EL2) ->
> > > > >>>>>>>>> Linux
> > > > >>>>>>>>> (EL1)
> > > > >>>>>>>>
> > > > >>>>>>>> Adding support for ATF means that using U-Boot on Stratix10
> > > > >>>>>>>> and Agilex without ATF keeps working, right?
> > > > >>>>>>> ATF is needed in order for Stratix10 and Agilex's U-Boot to work.
> > > > >>>>>>
> > > > >>>>>> Is there a technical requirement for that?
> > > > >>>>> Yes. We are using ATF to provide PSCI services such as system
> > > > >>>>> reset (COLD reset), CPU_ON/CPU_OFF (CPU hotplug in Linux) and
> > > > >>>>> other secure services such as mailbox communications with
> > > > >>>>> Secure Device Manager and accessing the System Manager
> > > > >>>>> registers which are
> > > > >> secure.
> > > > >>>>> Without PSCI services, we are able to boot until U-Boot proper only.
> > > > >>>>> Currently, our U-Boot in mainline doesn't boot to Linux due to
> > > > >>>>> these missing
> > > > >>>> PSCI services.
> > > > >>>>> Another reason is we have another boot flow which is using ATF +
> > UEFI.
> > > > >>>>> So now we are re-using the PSCI services from ATF so that now
> > > > >>>>> U-Boot and UEFI share the same ATF-BL31 image so that we don't
> > > > >>>>> have to
> > > > >>>> reimplement another sets of PSCI services for U-Boot again.
> > > > >>>>> This will greatly reduce our engineering efforts.
> > > > >>>>
> > > > >>>> Hmm, thanks for the explanation.
> > > > >>>>
> > > > >>>> I don't really think I can review this, given the lack of
> > > > >>>> knowledge about that PSCI stuff.
> > > > >>> I believe you can review it.
> > > > >>> Have you briefly gone through the patches ? It has nothing to do
> > > > >>> with the PSCI
> > > > >> stuff.
> > > > >>> It just call the invoke_smc() function to call the ATF's PSCI
> > > > >>> functions. Those PSCI functions in ATF will do the rest.
> > > > >>
> > > > >> No, not yet. But see below.
> > > > >>
> > > > >>>>
> > > > >>>> I must say it seems strange to me that U-Boot would have to
> > > > >>>> rely on ATF
> > > > >> though.
> > > > >>>> How do other platforms implement this? Shouldn't PSCI be
> > > > >>>> generic or is it really platform specific? If it's generic,
> > > > >>>> isn't that a dupliation of code if you implement e.g. a reset
> > > > >>>> driver for
> > > > >>>> Stratix10 but call
> > > > >> into PSCI?
> > > > >>> It's not strange at all. A lot of U-Boot users already using
> > > > >>> this boot flow (ATF +
> > > > >> U-Boot).
> > > > >>
> > > > >> Just because other boards do this doesn't mean it's not strange.
> > > > >> Wasn't there some kind of discussion around that PSCI stuff to
> > > > >> make it
> > > > available from U-Boot?
> > > > >> What's wrong with that way?
> > > > > Our downstream U-Boot branch is already implemented the PSCI
> > > > > stuffs in U-
> > > > Boot.
> > > > > I tried to upstream my PSCI code:
> > > > > https://lists.denx.de/pipermail/u-boot/2019-May/368822.html
> > > > >
> > > > > Marek pointed me to this thread:
> > > > > https://www.mail-archive.com/u-boot@lists.denx.de/msg319458.html
> > > > >
> > > > > He had a point. He suggested maybe we can implement the PSCI
> > > > > stuffs in SPL/TPL. I took a look at the U-Boot code and found out
> > > > > ATF is already well
> > > > supported. Why don't we just use the PSCI code from ATF rather than
> > > > re- implementing the PSCI code again in SPL/TPL.
> > > > > It will save our effort to maintain two PSCI code in U-Boot and
> > > > > ATF while we
> > > > already have the ATF PSCI implementation to support UEFI.
> > > >
> > > > It seems to me we do have working code in U-Boot, what's missing is
> > > > "only" to turn it ino PSCI?
> > > Existing PSCI framework in U-Boot provide a way for us to turn the
> > > code into a PSCI handler by just adding a '__secure' keyword before the
> > function name. See:
> > > https://gitlab.denx.de/u-boot/u-boot/blob/master/arch/arm/mach-socfpga
> > > /mailbox_s10.c
> > >
> > > Below is one of the functions that has 2 versions. One 'live' in a
> > > normal code section and another one will be relocated to "__secure"
> > > section (for PSCI). You can see that 2 same functions are duplicated for normal
> > code section and PSCI section.
> > >
> > > int mbox_send_cmd(u8 id, u32 cmd, u8 is_indirect, u32 len, u32 *arg,
> > > u8 urgent, u32 *resp_buf_len, u32 *resp_buf) {
> > > return mbox_send_cmd_common(id, cmd, is_indirect, len, arg, urgent,
> > > resp_buf_len, resp_buf); }
> > >
> > > int __secure mbox_send_cmd_psci(u8 id, u32 cmd, u8 is_indirect, u32 len,
> > > u32 *arg, u8 urgent, u32 *resp_buf_len,
> > > u32 *resp_buf) {
> > > return mbox_send_cmd_common(id, cmd, is_indirect, len, arg, urgent,
> > > resp_buf_len, resp_buf); }
> > >
> > > Those functions that are needed by PSCI runtime need to be duplicated for
> > "__secure" section.
> > > U-Boot Proper will copy and relocate the PSCI code in "__secure"
> > > section to a location before booting Linux whereby they can be called
> > > by Linux. Using the PSCI framework, U-Boot proper is not able to call any PSCI
> > functions because PSCI code is not available until U-Boot proper ready to boot
> > Linux.
> > > So that's the reason we need to have 2 sets of code in U-Boot. One for
> > > SPL/U-Boot and another one for PSCI section which is used by Linux.
> > > Currently we have 2 implementations for FPGA reconfiguration driver in our
> > downstream branch.
> > > One for SPL/U-Boot and another one for Linux (PSCI). FPGA
> > > reconfiguration driver for U-Boot is already upstreamed but I don't think I can
> > get the FPGA reconfiguration for the PSCI part upstreamed.
> > > They are 2 sets of different code for the same purpose. But that is
> > > what we have done in downstream to make sure we can support Linux.
> > >
> > > BTW, we are going to get rid of those duplicated code for PSCI after we switch
> > to ATF boot flow.
> >
> > I think we have already discussed why that style is bad and unstable.
> >
> > The correct thing to do would be to compile an SPL style binary from the U-Boot
> > sources that can replace ATF-BL31, not this messy __secure thing.
> >
> > I can see others (rockchip, TI, NXP?) might in part rely on ATF as well, but
> > speaking for socfpga, if you must insist on using ATF, I would be happy if you
> > could do it in a way that does not reduce existing functionality in U-Boot.
> Please do 'git grep CONFIG_SPL_ATF' and you will have some idea who are using the ATF
> with U-Boot. You can know which platforms are using the ATF by looking at the name
> of the defconfig files.
That's where I found Rockchip, TI and NXP. I see I missed Xilinx.
>
> BTW, what makes you think this ATF method reduce the existing functionality in U-Boot ?
> I don't really get that. I would like to know more to see what I can do to ease your concern.
You're making U-Boot (GPL-licensed) depend on ATF (BSD-licensed). That's my
main concern.
Then, you're making the whole build more complicated by having to build 2
independent projects (in matching versions, as they share at least one header
file).
I'd say it would be more straightforward to integrate PSCI services into
U-Boot. I know that comes at the expense of someone taking the time to fix
U-Boot PSCI support from "__secure" to a proper way. But I think the result
would be cleaner.
Added to that, with what you told me so far, you reduce U-Boot functionality
by making the existing drivers in U-Boot proper require PSCI services, so
U-Boot won't run standalone if you decide to not use ATF.
> >
> > > >
> > > > And given U-Boot aims to support UEFI (kind of?), I'd rather argue:
> > > > why do you need ATF at all?
> > >
> > > No, U-Boot does not aim to support UEFI. We have 2 boot flows that don't
> > mix:
> >
> > Really? Or do you mean you don't aim to support EFI boot using U-Boot?
> > I don't know that (U)EFI stuff too well, yet, but I was under the impression that
> > Heinrich et. al. do want U-Boot to support UEFI?
> Yes. Currently, we have no plan to support (U)EFI boot with U-Boot.
> Anyway, I am not working on UEFI boot flow. That's the work from another team.
> >
> > >
> > > 1) U-Boot -> ATF-BL31 -> U-Boot Proper -> Linux
> > >
> > > 2) ATF-BL2 -> ATF-BL31 -> UEFI -> Other OSes or Linux
> > >
> > > These two boot flows now share the same code base (ATF-BL31).
> > > >
> > > > Indeed, having the same code in both seems like double effort for
> > maintenance.
> > > >
> > > > >>
> > > > >> In my opinion, you're reducing functionality in U-Boot by making
> > > > >> ATF a requirement.
> > > > >>
> > > > >> And by saying "I can't review this", I mean this looks like a
> > > > >> questionable way to me and I'm not the one to say if a U-Boot
> > > > >> board should
> > > > go this way or not.
> > > > > I understand. Btw, who should I include to review this ?
> > > > >>
> > > > >>> Yes. PSCI is a generic software interface which encapsulate the
> > > > >>> platform
> > > > >> specific code.
> > > > >>> Let me give you a good example in one of your sysreset driver
> > > > >>> you have
> > > > >> implemented for S10.
> > > > >>>
> > > > >>> #include <dm.h>
> > > > >>> #include <errno.h>
> > > > >>> #include <sysreset.h>
> > > > >>> -#include <asm/arch/mailbox_s10.h>
> > > > >>>
> > > > >>> static int socfpga_sysreset_request(struct udevice *dev,
> > > > >>> enum sysreset_t type) {
> > > > >>> - puts("Mailbox: Issuing mailbox cmd REBOOT_HPS\n");
> > > > >>> - mbox_reset_cold();
> > > > >>> + psci_system_reset();
> > > >
> > > > And coming back on this, the sysreset driver won't work in SPL any more,
> > right?
> > > You brought a very good point. See my comment at the bottom.
> > > >
> > > > >>
> > > > >> So this is not an socfgpa_s10 specific driver any more, right?
> > > This driver code can be renamed to more generic name such as
> > socfpga_soc64.c.
> > > So that it can be shared by both Stratix10 and Agilex.
> > > > >>
> > > > >>> return -EINPROGRESS;
> > > > >>> }
> > > > >>>
> > > > >>> Above is the changes in one of my patchsets, the sysreset driver
> > > > >>> for
> > > > >>> S10 used to call mbox_reset_cold() to send mailbox message to
> > > > >>> Secure Device Manager
> > > > >>> (SDM) to trigger COLD reset.
> > > > >>> Calling 'mbox_reset_cold()' means you are calling platform
> > > > >>> specific code in the sysreset driver to perform COLD reset. What
> > > > >>> if method to trigger
> > > > >> COLD reset is changed in new platform ?
> > > > >>> We have to change the sysreset driver code to support another
> > > > >>> new
> > > > platform.
> > > > >>> If this function call is replaced with "psci_system_reset()", we
> > > > >>> don't have to change the code at all because all the platform
> > > > >>> specific code for COLD reset is now reside in ATF because this
> > > > >>> function just invoke the PSCI function provided by ATF. You just
> > > > >>> have to replace the ATF binary with the new implementation for
> > > > >>> the new platform. We can re-use this sysreset driver for any
> > > > >>> platform that support ATF. In fact, it makes our U-Boot driver
> > > > >>> code more 'generic' because PSCI interface stay the same. BTW,
> > > > >>> Linux also call PSCI functions to perform COLD reset. By
> > > > >> using ATF, U-Boot and Linux share the same COLD reset service
> > > > >> provided by
> > > > ATF.
> > > > >> It actually reduce code duplication.
> > > > >>
> > > > >> What I meant was code duplication inside the U-Boot tree (having
> > > > >> one driver for each arch but in effect all those drivers will
> > > > >> call into the same psci
> > > > function).
> > > > > Can different archs share the same driver if the driver code is
> > > > > common to
> > > > those platforms ?
> > > >
> > > > I don't know why not. However, you then need a different way to
> > > > select this
> > > > driver: you clearly cannot use DT compatibles as this DT entry does
> > > > not in any way stand for what you make the driver binding to it execute.
> > > >
> > > > Instead, I would think of a way to make your PSCI-aware U-Boot
> > > > proper use a generic PSCI-reset driver instead of the one matching
> > > > the devicetree. And then keep in mind you still need the DT-matching
> > > > driver in SPL. Thinking about it, having a driver in SPL you don't
> > > > use in U-Boot proper is probably not done, yet, as well.
> > > I don't have any problem with this approach (PSCI-reset driver) but it
> > > is very easy to support SPL and U-Boot proper in the same driver by just
> > checking the current exception level. Please take a look at the code below.
> > >
> > > #include <dm.h>
> > > #include <errno.h>
> > > #include <sysreset.h>
> > > #include <asm/arch/mailbox_s10.h>
> > >
> > > static int socfpga_sysreset_request(struct udevice *dev,
> > > enum sysreset_t type) {
> > > - puts("Mailbox: Issuing mailbox cmd REBOOT_HPS\n");
> > > + If (current_el() == 3)
> >
> > Hard-coding the EL here seems quite a hack?
> >
> > > + mbox_reset_cold();
> > > + else
> > > + psci_system_reset();
> > > return -EINPROGRESS;
> > > }
> > >
> > > We can make the sysreset driver compatible in SPL and U-Boot proper by just
> > checking the current exception level.
> > > If it's EL3 (secure), we knew SPL is running and otherwise U-Boot proper (EL2,
> > non-secure) is running.
> >
> > So you compile all the PSCI stuff into SPL although never using it?
> The PSCI stuff is just a very thin layer (interface to PSCI/SMC call) since real work is done in ATF.
> Or we can do it in compile time:
> #ifdef CONFIG_SPL_BUILD
> // do it in normal way
> #else
> // invoke PSCI call
> #endif
> >
> > I'd still prefer to have DT-compat matched drivers implementing the hardware
> > access.
> > Then you can instantiate different drivers in U-Boot proper if you want to use
> > PSCI, not the hardware. Having DT-compat matched drivers do something
> > completely different (issuing PSCI calls instead of accessing the hardware they
> > matched on) seems wrong.
> OK.
> >
> > Regards,
> > Simon
> >
> > > Or we can make a small generic function like below and call it from sysreset
> > driver code:
> > >
> > > void soc64_cold_reset(void)
> > > {
> > > If (current_el() == 3)
> > > mbox_reset_cold();
> > > else
> > > psci_system_reset();
> > > }
> > >
> > > >
> > > > >
> > > > >> What you're doing is to move this code from U-Boot open U-Boot
> > > > >> sources to possibly closed source ATF sources. But we've already
> > > > >> had that discussion, I think...
> > > > > Our PSCI implementation in ATF is open source:
> > > > > https://github.com/ARM-software/arm-trusted-firmware/tree/master/p
> > > > > lat/
> > > > > intel/soc
> > > >
> > > > Well, open source... Without implying anything: it's BSD, so it's
> > > > open source as long as Intel wants it to be open source and nothing
> > > > prevents the next manager from keeping additions or even bugfixes closed
> > source.
> > > > For whatever reasons might come.
> > > >
> > > >
> > > > Regards,
> > > > Simon
> > > >
> > > > >
> > > > >>
> > > > >> Regards,
> > > > >> Simon
> > > > >>
> > > > >>>
> > > > >>> I think you are aware of we are working to move the mailbox
> > > > >>> driver code away
> > > > >> from arch to drivers.
> > > > >>> You will see that a lot of those mailbox functions will be
> > > > >>> removed from the
> > > > >> mailbox driver.
> > > > >>> One of them is 'mbox_reset_cold()' which you called in sysreset
> > > > >>> driver for
> > > > S10.
> > > > >>>
> > > > >>>> Regards,
> > > > >>>> Simon
> > > > >>>>
> > > > >>>>>>
> > > > >>>>>> Regard,
> > > > >>>>>> Simon
> > > > >>>>>>
> > > > >>>>>>>>>
> > > > >>>>>>>>> SPL loads the u-boot.itb which consist of:
> > > > >>>>>>>>> 1) u-boot-nodtb.bin (U-Boot Proper image)
> > > > >>>>>>>>> 2) u-boot.dtb (U-Boot Proper DTB)
> > > > >>>>>>>>> 3) bl31.bin (ATF-BL31 image)
> > > > >>>>>>>>>
> > > > >>>>>>>>> Supported Platform: Intel SoCFPGA 64bits (Stratix10 &
> > > > >>>>>>>>> Agilex)
> > > > >>>>>>>>>
> > > > >>>>>>>>> Now, U-Boot Proper is running in non-secure mode (EL2), it
> > > > >>>>>>>>> invokes SMC/PSCI calls provided by ATF to perform COLD
> > > > >>>>>>>>> reset, System Manager register accesses and mailbox
> > > > >>>>>>>>> communications with Secure Device Manager (SDM).
> > > > >>>>>>>>>
> > > > >>>>>>>>> Steps to build the U-Boot with ATF support:
> > > > >>>>>>>>> 1) Build U-Boot
> > > > >>>>>>>>> 2) Build ATF BL31
> > > > >>>>>>>>> 3) Copy ATF BL31 binary image into U-Boot's root folder
> > > > >>>>>>>>> 4) "make u-boot.itb" to generate u-boot.itb
> > > > >>>>>>>>>
> > > > >>>>>>>>> These patchsets have dependency on:
> > > > >>>>>>>>> [U-Boot,v8,00/19] Add Intel Agilex SoC support:
> > > > >>>>>>>>> https://patchwork.ozlabs.org/cover/1201373/
> > > > >>>>>>>>>
> > > > >>>>>>>>> Chee Hong Ang (19):
> > > > >>>>>>>>> arm: socfpga: add fit source file for pack itb with ATF
> > > > >>>>>>>>> arm: socfpga: Add function for checking description
> > > > >>>>>>>>> from FIT
> > > > >> image
> > > > >>>>>>>>> arm: socfpga: Load FIT image with ATF support
> > > > >>>>>>>>> arm: socfpga: Override 'lowlevel_init' to support ATF
> > > > >>>>>>>>> configs: socfpga: Enable FIT image loading with ATF support
> > > > >>>>>>>>> arm: socfpga: Disable "spin-table" method for booting Linux
> > > > >>>>>>>>> arm: socfpga: Add SMC helper function for Intel SOCFPGA
> > (64bits)
> > > > >>>>>>>>> arm: socfpga: Define SMC function identifiers for PSCI SiP
> > services
> > > > >>>>>>>>> arm: socfpga: Add secure register access helper functions for
> > SoC
> > > > >>>>>>>>> 64bits
> > > > >>>>>>>>> arm: socfpga: Secure register access for clock manager (SoC
> > 64bits)
> > > > >>>>>>>>> arm: socfpga: Secure register access in PHY mode setup
> > > > >>>>>>>>> arm: socfpga: Secure register access for reading PLL frequency
> > > > >>>>>>>>> mmc: dwmmc: socfpga: Secure register access in MMC driver
> > > > >>>>>>>>> net: designware: socfpga: Secure register access in MAC driver
> > > > >>>>>>>>> arm: socfpga: Secure register access in Reset Manager driver
> > > > >>>>>>>>> arm: socfpga: stratix10: Initialize timer in SPL
> > > > >>>>>>>>> arm: socfpga: stratix10: Refactor FPGA reconfig driver
> > > > >>>>>>>>> to support
> > > > >> ATF
> > > > >>>>>>>>> arm: socfpga: Bridge reset now invokes SMC calls to
> > > > >>>>>>>>> query FPGA
> > > > >>>> config
> > > > >>>>>>>>> status
> > > > >>>>>>>>> sysreset: socfpga: Invoke PSCI call for COLD reset
> > > > >>>>>>>>>
> > > > >>>>>>>>> Dalon Westergreen (1):
> > > > >>>>>>>>> configs: stratix10: Remove CONFIG_OF_EMBED
> > > > >>>>>>>>
> > > > >>>>>>>> This one is included in another series already:
> > > > >>>>>>>> https://patchwork.ozlabs.org/user/todo/uboot/?series=132976
> > > > >>>>>>>>
> > > > >>>>>>>> Does this mean that one will be abandonen?
> > > > >>>>>>>> So the combined hex output part of that series is not
> > > > >>>>>>>> required any
> > > > >> more?
> > > > >>>>>>>>
> > > > >>>>>>>> Regards,
> > > > >>>>>>>> Simon
> > > > >>>>>>>>
> > > > >>>>>>>>>
> > > > >>>>>>>>> arch/arm/mach-socfpga/Kconfig | 2 -
> > > > >>>>>>>>> arch/arm/mach-socfpga/Makefile | 4 +
> > > > >>>>>>>>> arch/arm/mach-socfpga/board.c | 10 +
> > > > >>>>>>>>> arch/arm/mach-socfpga/clock_manager_agilex.c | 5 +-
> > > > >>>>>>>>> arch/arm/mach-socfpga/clock_manager_s10.c | 5 +-
> > > > >>>>>>>>> arch/arm/mach-socfpga/include/mach/misc.h | 3 +
> > > > >>>>>>>>> .../mach-socfpga/include/mach/secure_reg_helper.h | 20 ++
> > > > >>>>>>>>> arch/arm/mach-socfpga/lowlevel_init.S | 48 +++
> > > > >>>>>>>>> arch/arm/mach-socfpga/misc_s10.c | 47 ++-
> > > > >>>>>>>>> arch/arm/mach-socfpga/reset_manager_s10.c | 31 +-
> > > > >>>>>>>>> arch/arm/mach-socfpga/secure_reg_helper.c | 67 ++++
> > > > >>>>>>>>> arch/arm/mach-socfpga/timer_s10.c | 3 +-
> > > > >>>>>>>>> arch/arm/mach-socfpga/wrap_pll_config_s10.c | 9 +-
> > > > >>>>>>>>> board/altera/soc64/its/fit_spl_atf.its | 51 +++
> > > > >>>>>>>>> configs/socfpga_agilex_defconfig | 8 +-
> > > > >>>>>>>>> configs/socfpga_stratix10_defconfig | 9 +-
> > > > >>>>>>>>> drivers/fpga/stratix10.c | 261 ++++----------
> > > > >>>>>>>>> drivers/mmc/socfpga_dw_mmc.c | 7 +-
> > > > >>>>>>>>> drivers/net/dwmac_socfpga.c | 5 +-
> > > > >>>>>>>>> drivers/sysreset/sysreset_socfpga_s10.c | 4 +-
> > > > >>>>>>>>> include/configs/socfpga_soc64_common.h | 2 +-
> > > > >>>>>>>>> include/linux/intel-smc.h | 374
> > > > >> +++++++++++++++++++++
> > > > >>>>>>>>> 22 files changed, 732 insertions(+), 243 deletions(-)
> > > > >>>>>>>>> create mode
> > > > >>>>>>>>> 100644
> > > > >>>>>>>>> arch/arm/mach-socfpga/include/mach/secure_reg_helper.h
> > > > >>>>>>>>> create mode 100644 arch/arm/mach-socfpga/lowlevel_init.S
> > > > >>>>>>>>> create mode 100644
> > > > >>>>>>>>> arch/arm/mach-socfpga/secure_reg_helper.c
> > > > >>>>>>>>> create mode 100644 board/altera/soc64/its/fit_spl_atf.its
> > > > >>>>>>>>> create mode 100644 include/linux/intel-smc.h
> > > > >>>>>>>>>
> > > > >>>>>>>>> --
> > > > >>>>>>>>> 2.7.4
> > > > >>>>>>>>>
> > >
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