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<
igraltist>
is there any performance impact when allow h3 only boot into secure mode?
<
igraltist>
oh its shown only 1 cpu insteed of four
<
kilobyte>
at least some distros turn off/restrict a lot of kernel features when in secure mode, this may have an effect
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<
igraltist>
so for normal use secure mode is not usefull
<
tuxd3v>
what you men boot into secure mode?
<
tuxd3v>
compiling uboot with ATF?
<
kilobyte>
riiight... I assumed you're talking about secure boot
<
tuxd3v>
I only compile bl31 stage
<
igraltist>
from u-boot: CONFIG_ARMV7_BOOT_SEC_DEFAULT
<
tuxd3v>
if you run with, CONFIG_ARMV7_NONSEC set, and CONFIG_ARMV7_BOOT_SEC_DEFAULT unset or absent, you are running in the most privileged mode
<
tuxd3v>
in hypervisor mode I believe
<
tuxd3v>
I am not sure if unset-ting CONFIG_ARMV7_NONSEC is sufficient to run only in supervised mode..
<
igraltist>
i am just testing a bit the config options, will see the results
<
tuxd3v>
they seems a bit contraditory,uboot vs arm..
<
tuxd3v>
PSCI only works if in hypervisor more
<
tuxd3v>
at least as far as I know
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<
tuxd3v>
with security on you run into supervisor more( a more restricted mode )
<
tuxd3v>
in hypervisor mode you at at the top :)
<
tuxd3v>
so its less secure
<
igraltist>
on u-boot u can disable hyp but boot on non-secure
<
tuxd3v>
but then you will in some sort of supervisor mode?
<
tuxd3v>
or a mid way between both
<
tuxd3v>
I got what you are telling :)
<
igraltist>
now i try to set all from defconfig expect the boot in secure mode, will see if 4 cpus bring up
<
igraltist>
top shows only one cpu too
<
tuxd3v>
do one thing:
<
tuxd3v>
'for num in {1..100000000000..1}; do echo "nproc: $(nproc)"; done'
<
tuxd3v>
type this in a shell
<
tuxd3v>
then in another one
<
tuxd3v>
depends on the amount of load the system have, it will bring more cpus online or less
<
tuxd3v>
but test it..
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<
igraltist>
load over 6 and eat up nearly all mem but shows only cpu0
<
tuxd3v>
well in that case, probably you are right..
<
tuxd3v>
and only come up 1 cpu
<
tuxd3v>
does you have hotplug capability?
<
tuxd3v>
I mean enable or disable cpus
<
tuxd3v>
with machine up and running?
<
tuxd3v>
one way of triyng would be to add more cpus.. or even list if they are there..
<
tuxd3v>
you are in secure mode aka supervisor mode:
<
tuxd3v>
[ 0.003809] CPU: All CPU(s) started in SVC mode.
<
kilobyte>
instead of loading the system, you can read the files in /sys/devices/system/cpu
<
kilobyte>
online, offline, present, possible
<
igraltist>
cat /sys/devices/system/cpu/cpu*/hotplug/state
<
igraltist>
only one is up and its shown cpu0-3
<
tuxd3v>
you habe 6 cpus right?
<
tuxd3v>
how many you configured in the kernel, when you compiled iut?
<
tuxd3v>
sorry you have 4
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<
igraltist>
cant set this online, says not rights
<
igraltist>
cat /sys/devices/system/cpu/possible
<
kilobyte>
and present, right?
<
igraltist>
yes there too
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<
igraltist>
so only need to find to switch them on
<
igraltist>
maybe must add a cmdline param
<
igraltist>
maybe must take a look into kernel config for cpuhotpulg
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<
igraltist>
the online switch for other cpu[1-3] is missing
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<
MoeIcenowy>
igraltist: why do you need H3 to boot into secure?
<
MoeIcenowy>
the mainline Linux kernel lacks the CPU bringing up code for H3
<
MoeIcenowy>
so it requires some secure monitor to bring up the extra cores
<
igraltist>
its was just a playgroud
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<
warpme_>
guys: where I can find most actual v4l2-request patches for ffmpeg?
<
anarsoul>
better ask in #cedrus
<
anarsoul>
or ping paulk-leonov directly
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