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On Sunday, October 22, 2023 at 8:33:20 PM UTC+1 Ralf Ramsauer wrote:
> Hi Bharathiraja,
>
> On 20/10/2023 15:50, Bharathiraja Nallathambi wrote:
> > Hi Ralf,
> >
> > Thanks for providing the suggestion, with the boot log, we found the
> > below message,
> >
> > /[ 0.045828] psci: no cpu_on method, not booting CPU1/
>
> Hmm.
>
> >
> > We went on updating the inmate Linux dts with the following node,
> >
> > /psci {
> > compatible = "arm,psci-1.0";
> > method = "smc";
> > };/
>
> The device trees are in jailhouse upstream, right? Actually,
> 'enable-method = "psci";' in the cpu section of the dt was sufficient so
> far. Maybe this changed to cpu-on? It might be that your change is
> required for more recent kernel versions.
>
> If so, patches welcome! :-)
>
> Thanks,
> Ralf
>
>
> >
> > Now we are able to see both the CPUs enabled and working as expected
> >
> > /[ 0.003483] CPU1: Booted secondary processor 0x0000000003
> [0x410fd083]/
> >
> > Thanks for the support.
> >
> > Thanks and Regards,
> > Bharathiraja Nallathambi
> >
> > On Wednesday, 11 October 2023 at 01:26:19 UTC+5:30 Ralf Ramsauer wrote:
> >
> >
> >
> > On 10/10/2023 17:17, Bharathiraja Nallathambi wrote:
> > > Hi,
> > >
> > > I was trying jailhouse with a linux inmate on an imx8mp-evk board. I
> > > have created a yocto build with jailhouse and linux kernel
> > 6.1.22-rt8
> > > which is having the patches for real time linux.
> > > Booted the board with running run '/jh_mmcboot/' in the uboot
> > prompt.
> > >
> > > Once logged into the device, I have started the jailhouse by
> > running,
> > >
> > > /cd /usr/share/jailhouse/scripts && ./init_jailhouse_env.sh && cp
> > > /run/media/boot-mmcblk1p1/Image
> > /usr/share/jailhouse/inmates/kernel/ &&
> > > ../tools/jailhouse enable ../cells/imx8mp.cell; jailhouse cell
> > list;/
> > >
> > > the above command will load the jailhouse.ko and will enable the
> > jailhouse
> > >
> > > I got the output of 'jailhouse cell list' as,
> > > /root@imx8mp-lpddr4-evk:/usr/share/jailhouse/scripts# jailhouse
> > cell list
> > > ID Name State Assigned
> > > CPUs Failed CPUs
> > > 0 imx8mp running 0-3 /
> > >
> > > Then I started the linux inmate, the CPU offset in the cell
> > > configuration is 0xc which will assign two cores. I am using the
> > same
> > > host kernal image for the inmate also (6.1.22-rt8). Used the below
> > > command to start the inmate
> > >
> > > ../tools/jailhouse cell linux ../cells/imx8mp-linux-demo.cell
> > > ../inmates/kernel/Image -d ../inmates/dtb/inmate-imx8mp-evk.dtb -c
> > > "clk_ignore_unused console=ttymxc3,115200
> > > earlycon=ec_imx6q,0x30890000,115200 root=/dev/mmcblk2p2 rootwait
> > rw";
> > > jailhouse cell list;
> > >
> > > I got the output of 'jailhouse cell list' as,
> > >
> > > /root@imx8mp-lpddr4-evk:/usr/share/jailhouse/scripts# jailhouse
> > cell list
> > > ID Name State Assigned
> > > CPUs Failed CPUs
> > > 0 imx8mp running 0-1
> > > 1 linux-inmate-demo running 2-3 /
> > >
> > > I could login to the inmate using serial console. But the output of
> > > 'cat /proc/cpuinfo' is showing only one core.
> > >
> > > /root@imx8mp-lpddr4-evk:~# cat /proc/cpuinfo
> > > processor : 0
> > > BogoMIPS : 16.66
> > > Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
> > > CPU implementer : 0x41
> > > U architecture: 8
> > > CPU variant : 0x0
> > > CPU part : 0xd03
> > > CPU resion : 4/
> > >
> > > the 'nproc --all' is giving 2
> > >
> > > It looks like 2 cores are assigned to the inmate but one of the
> > core
> > > is offline.
> > >
> > > / root@imx8mp-lpddr4-evk:/usr/share/jailhouse/scripts# cat
> > > /sys/devices/system/cpu/cpu0/online /
> > >
> > > /1
> > > root@imx8mp-lpddr4-evk:/usr/share/jailhouse/scripts# cat
> > > /sys/devices/system/cpu/cpu1/online
> > > 0/
> > >
> > > Am I doing something wrong? How can I turn on both the CPUS for the
> > > inmate.
> >
> > What does the non-root Linux kernel console output during boot? Are
> > there any error messages that might give you a hint why bringing up
> > secondary CPUs failed?
> >
> > Ralf
> >
> > >
> > > Thanks and Regards,
> > > Bharathiraja Nallathambi
> > >
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