Hi Heinrich, On Thu, 21 Jan 2021 at 02:19, Heinrich Schuchardt <xypron.g...@gmx.de> wrote: > > On 07.01.21 13:35, Simon Glass wrote: > > Hi Heinrich, > > > > On Wed, 30 Dec 2020 at 10:07, Heinrich Schuchardt <xypron.g...@gmx.de> > > wrote: > >> > >> The UEFI Self Certification Test (SCT) checks the SetTime() service with > >> the following steps: > >> > >> * set date > >> * reset > >> * check date matches > >> > >> To be compliant the sandbox should keep the offset to the host RTC during > >> resets. The implementation uses the environment variable > >> UBOOT_SB_TIME_OFFSET to persist the offset. > >> > >> Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de> > >> --- > >> arch/sandbox/cpu/os.c | 25 +++++++++++++++++++++++++ > >> doc/arch/sandbox.rst | 7 +++++++ > >> drivers/rtc/i2c_rtc_emul.c | 4 +++- > >> include/os.h | 18 ++++++++++++++++++ > >> 4 files changed, 53 insertions(+), 1 deletion(-) > > > > Sandbox writes driver settings to a state file that can be read on > > start-up. Is that suitable here? > > The sandbox only reads the state from file when using the -r and only > writes the state to while when using the -w option. > > This should be documented in > https://u-boot.readthedocs.io/en/latest/arch/sandbox.html?highlight=sandbox#command-line-options > > The RTC offset needs to be kept irrespective of command line arguments > during resets. I could not find a simpler way then using an environment > variable.
Given the way that reset works (relaunching the ELF app) I don't know of a better way either. I suppose you could launch it with the RTC offset as a command-line parameter? > > We could additionally persist the offset in the state file. Is this what > you ask for? For my testing purposes I don't need it. I don't think so. It is designed for passing driver / state information between U-Boot phases. I suppose it should be used for persisting state across reset too, since in principle the emulated hardware does not change just because sandbox has reset. But in that case we don't really need to write a file, just keep it in memory somewhere. Or at most we could write a temporary file. Reviewed-by: Simon Glass <s...@chromium.org> Regards, Simon Applied to u-boot-dm, thanks!
