Re: [Xen-devel] vTPM Manager shuts down

[Ross Philipson <Ross.Philipson@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel-
> bounces@xxxxxxxxxxxxx] On Behalf Of Ross Philipson
> Sent: Wednesday, May 22, 2013 3:06 PM
> To: Konrad Rzeszutek Wilk; Daniel De Graaf
> Cc: Jordi Cucurull Juan; xen-devel@xxxxxxxxxxxxx
> Subject: Re: [Xen-devel] vTPM Manager shuts down
> 
> > -----Original Message-----
> > From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel-
> > bounces@xxxxxxxxxxxxx] On Behalf Of Konrad Rzeszutek Wilk
> > Sent: Wednesday, May 22, 2013 2:00 PM
> > To: Daniel De Graaf
> > Cc: Jordi Cucurull Juan; xen-devel@xxxxxxxxxxxxx
> > Subject: Re: [Xen-devel] vTPM Manager shuts down
> >
> > > (XEN) General information for domain 5:
> > > (XEN)     refcnt=3 dying=0 pause_count=0
> > > (XEN)     nr_pages=7168 xenheap_pages=5 shared_pages=0 paged_pages=0
> > dirty_cpus={} max_pages=7424
> > > (XEN)     handle=3097d8b9-8d80-4bde-94b6-978c98c37296
> > vm_assist=00000000
> > > (XEN) Rangesets belonging to domain 5:
> > > (XEN)     I/O Ports  { }
> > > (XEN)     Interrupts { }
> > > (XEN)     I/O Memory { fed40 }
> > >
> > > Note: my config contains "iomem=['fed40,1']" not "iomem=['fed40,5']"
> > so your
> > > output will differ there.
> >
> > Is that address (fed40) standard? Are there other TPM devices at other
> > locations?
> 
> Yes that is defined in the TCG's TPM spec. That is the beginning of the
> PCRs
> for locality 0 and they range up to locality 4: FED4_0xxxh - FED4_4xxxh
> 
> If you search for something like TCG_PCClientTPMSpecification_1-21_1-
> 00_FINAL.pdf
> you can find that information (chapter 9 is on locality).
> 
> > How does one find them? lspci?
> 
> The TPM lives on the LPC bus. Some of its features are exported in
> sysfs:
> 
> /sys/class/misc/tpm0

Oh and sorry I sent it before I finished what I was going to say. You can
find information about it in ACPI. E.g. this Dell I have has a Broadcom
1.2 TPM:

    Device (\_SB.PCI0.LPCB.TPM)
    {
        Name (_HID, EisaId ("BCM0102"))
        Name (_CID, 0x310CD041)
        Name (_STR, Unicode ("TPM 1.2 Device"))
        Name (_CRS, ResourceTemplate ()
        {
            Memory32Fixed (ReadOnly,
                0xFED40000,         // Address Base
                0x00005000,         // Address Length
                )
        })
        ...
    }
> 
> >
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> 
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