Re: IMA fails to see TPM chip (rpi3, linaro optee)

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On Tue, 2019-02-26 at 07:14 -0500, Mimi Zohar wrote:
> On Tue, 2019-02-26 at 10:12 +0200, Markku Savela wrote:
> > In case anyone is interested, I got IMA to accept TPM chip in my
> > special 
> > case (linaro optee kernel) by changing
> > 
> >    clk-bcm2835.c: core_initcall -> susbsys_initcall
> >    raspberrypi.c: subsys_initcall -> core_initcall
> > 
> > At first check, the system seems to be ok. Maybe some combination
> > of initcalls could work, but this is enough for me.
> 
> Thank you for sharing this!

I've just had one of these on x86: a Dell Inspiron 7000 that I got for
my wife.  This is the dmesg:

cottony:~ # dmesg|grep -i tpm
[    0.000000] ACPI: TPM2 0x000000008A595160 000034 (v03 DELL   CBX3     00000001 AMI  00000000)
[    1.628559] ima: No TPM chip found, activating TPM-bypass! (rc=-19)

I haven't investigated what type of TPM this is yet, but I suspect the
bus is attaching after IMA activates.  The TPM works normally after
this.

James




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