[SeaBIOS] [PATCH v2 1/3] tpm: Wait for tpmRegValidSts flag on CRQ interface before probing

Paul Menzel pmenzel at molgen.mpg.de
Thu Mar 22 11:57:59 CET 2018

Dear Kevin,

On 03/21/18 15:38, Kevin O'Connor wrote:
> On Mon, Mar 19, 2018 at 12:23:10PM -0400, Stephen Douthit wrote:
>> On 03/19/2018 12:00 PM, Stefan Berger wrote:
>>> Wait for the tpmRegValidSts flag on the TPM_LOC_STATE_x register to
>>> be set; we espect the locAssigned flag to not be set.
>> s/espect/expect/ and in the subject line s/CRQ/CRB
>> Just retested the v2 series on my board so:
>> Tested-by: Stephen Douthit <stephend at silicom-usa.com>
> Thanks.  I committed this series.
> Does this resolve the pause at startup for non-TPM users?

I booted the latest master branch this morning on the ASRock E350M1, and 
a possible delay wasn’t noticeable by me. But looking at the log, there 
is still one time-out messages. Maybe I’ll have time to measure it next 

BS: BS_PAYLOAD_LOAD times (us): entry 0 run 32666 exit 0
Jumping to boot code at 000fec22(c7d77000)
CPU0: stack: c7eef000 - c7ef0000, lowest used address c7eef6ac, stack 
used: 2388 bytes
SeaBIOS (version rel-1.11.0-28-g4922d6c)
BUILD: gcc: (coreboot toolchain v1.50 October 15th, 2017) 6.3.0 
binutils: (GNU Binutils) 2.29.1
Found coreboot cbmem console @ c7fde000
Found mainboard ASROCK E350M1
Relocating init from 0x000e1e40 to 0xc7cf3300 (size 52320)
Found CBFS header at 0xffc00238
multiboot: eax=c7eea9a0, ebx=c7eea954
Found 24 PCI devices (max PCI bus is 03)
Copying SMBIOS entry point from 0xc7d40000 to 0x000f6620
Copying ACPI RSDP from 0xc7d51000 to 0x000f65f0
Copying MPTABLE from 0xc7d75000/c7d75010 to 0x000f63f0
Copying PIR from 0xc7d76000 to 0x000f63c0
Using pmtimer, ioport 0x808
WARNING - Timeout at wait_reg8:81!
Scan for VGA option rom
Running option rom at c000:0003
Turning on vga text mode console
SeaBIOS (version rel-1.11.0-28-g4922d6c)
EHCI init on dev 00:12.2 (regs=0xf014c020)
EHCI init on dev 00:13.2 (regs=0xf014d020)
OHCI init on dev 00:12.0 (regs=0xf0148000)
OHCI init on dev 00:13.0 (regs=0xf0149000)
OHCI init on dev 00:14.5 (regs=0xf014a000)
AHCI controller at 00:11.0, iobase 0xf014b000, irq 0
Searching bootorder for: /pci at i0cf8/*@11/drive at 0/disk at 0
AHCI/0: Set transfer mode to UDMA-6
Found 0 lpt ports
Found 1 serial ports
Searching bootorder for: /rom at img/memtest
Searching bootorder for: /rom at img/tint
Searching bootorder for: /rom at img/nvramcui
Searching bootorder for: /rom at img/coreinfo
AHCI/0: registering: "AHCI/0: SanDisk SDSSDP064G ATA-9 Hard-Disk (61057 
USB mouse initialized
PS2 keyboard initialized
All threads complete.
Scan for option roms

Press ESC for boot menu.

Maybe the time-out warning should be also rephrased to be better 
understandable, and a context given, that no TPM is found or set up.

Kind regards,


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