On Mon, Nov 19, 2018 at 07:38:39PM +0100, Stefano Garzarella wrote:
just an update, I enabled the debug prints and I saw two timeouts fired with a lot of time lost (~780ms between "init timer" and "Scan for VGA ..."), putting other prints I discovered that a lot of time is spent in the tpm_setup(), during the probe of the 2 TPM devices:
00.548869 init timer 00.549677 ./src/post.c:157 platform_hardware_setup 00.550182 ./src/hw/tpm_drivers.c:579 tpmhw_probe 01.300833 WARNING - Timeout at wait_reg8:81! 01.301388 ./src/hw/tpm_drivers.c:579 tpmhw_probe 01.331843 WARNING - Timeout at wait_reg8:81! 01.332316 ./src/post.c:160 platform_hardware_setup 01.333358 Scan for VGA option rom
FYI, this was raised a few months ago - see:
https://mail.coreboot.org/pipermail/seabios/2018-March/012186.html
IIRC, it should be possible to verify the TPM device is present before trying to wait for it.
-Kevin
On 11/20/18 10:55 AM, Kevin O'Connor wrote:
On Mon, Nov 19, 2018 at 07:38:39PM +0100, Stefano Garzarella wrote:
just an update, I enabled the debug prints and I saw two timeouts fired with a lot of time lost (~780ms between "init timer" and "Scan for VGA ..."), putting other prints I discovered that a lot of time is spent in the tpm_setup(), during the probe of the 2 TPM devices:
00.548869 init timer 00.549677 ./src/post.c:157 platform_hardware_setup 00.550182 ./src/hw/tpm_drivers.c:579 tpmhw_probe 01.300833 WARNING - Timeout at wait_reg8:81! 01.301388 ./src/hw/tpm_drivers.c:579 tpmhw_probe 01.331843 WARNING - Timeout at wait_reg8:81! 01.332316 ./src/post.c:160 platform_hardware_setup 01.333358 Scan for VGA option rom
FYI, this was raised a few months ago - see:
https://mail.coreboot.org/pipermail/seabios/2018-March/012186.html
IIRC, it should be possible to verify the TPM device is present before trying to wait for it.
We could skip probing entirely if there's no TCPA or TPM2 ACPI tables. There'd need to be some option to force probing in the case of missing/broken ACPI configurations.
-Kevin
On Tue, Nov 20, 2018 at 5:13 PM Steve Douthit stephend@silicom-usa.com wrote:
On 11/20/18 10:55 AM, Kevin O'Connor wrote:
On Mon, Nov 19, 2018 at 07:38:39PM +0100, Stefano Garzarella wrote:
just an update, I enabled the debug prints and I saw two timeouts fired with a lot of time lost (~780ms between "init timer" and "Scan for VGA ..."), putting other prints I discovered that a lot of time is spent in the tpm_setup(), during the probe of the 2 TPM devices:
00.548869 init timer 00.549677 ./src/post.c:157 platform_hardware_setup 00.550182 ./src/hw/tpm_drivers.c:579 tpmhw_probe 01.300833 WARNING - Timeout at wait_reg8:81! 01.301388 ./src/hw/tpm_drivers.c:579 tpmhw_probe 01.331843 WARNING - Timeout at wait_reg8:81! 01.332316 ./src/post.c:160 platform_hardware_setup 01.333358 Scan for VGA option rom
FYI, this was raised a few months ago - see:
https://mail.coreboot.org/pipermail/seabios/2018-March/012186.html
IIRC, it should be possible to verify the TPM device is present before trying to wait for it.
We could skip probing entirely if there's no TCPA or TPM2 ACPI tables. There'd need to be some option to force probing in the case of missing/broken ACPI configurations.
I've just tried the 0001-tpm-Check-for-TPM-related-ACPI-tables-before-attempt.patch (https://mail.coreboot.org/pipermail/seabios/2018-March/012188.html) and it solves my issue with the TPM.
Thanks, Stefano
-Kevin
-
Kevin O'Connor -
Stefano Garzarella -
Steve Douthit