Messages in this thread | | | Date | Sat, 26 Feb 2011 08:50:03 -0500 | From | Stefan Berger <> | Subject | Re: [PATCH] tpm_tis: Re-enable interrupts upon resume |
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On 02/26/2011 06:46 AM, Jiri Slaby wrote: > On 02/22/2011 08:49 PM, Stefan Berger wrote: >> Below patch applies to the tip of the git tree. >> >> This patch makes sure that if the TPM TIS interface is run in interrupt >> mode (rather than polling mode) that the interrupts are enabled in the >> TPM's interrupt enable register which may either have been cleared by >> the TPM's TIS loosing its state during device sleep in ACPI S3 (suspend) >> or by the BIOS, which upon resume sends a TPM_Startup() command to the >> TPM, and may run the TPM in polling mode and leave the TIS interrupts >> disabled once it transfers control to the OS again. >> >> Problem is, I don't currently have a machine running the TPM in >> interrupt mode. I found this through a self-built TPM device model for >> Qemu and SeaBIOS patches, where this does resolve a problem upon resume. >> >> You may want to check if your TPM runs with interrupts by doing >> >> cat /proc/interrupts | grep -i tpm > No, this is empty output. Ok. That's what most TPM seem to do now -- they run in polling mode.
Stefan
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