On Thu, Feb 27, 2020 at 06:23:39PM +0200, Jarkko Sakkinen wrote:

On Thu, Feb 27, 2020 at 10:50:03AM -0500, George Wilson wrote:

quoted

tpm_ibmvtpm_send() can fail during LPM resume with an H_CLOSED return
from ibmvtpm_send_crq().  The PAPR says, 'The “partner partition
suspended” transport event disables the associated CRQ such that any
H_SEND_CRQ hcall() to the associated CRQ returns H_Closed until the CRQ
has been explicitly enabled using the H_ENABLE_CRQ hcall.' This patch
adds a check in tpm_ibmvtpm_send() for an H_CLOSED return from
ibmvtpm_send_crq() and in that case calls tpm_ibmvtpm_resume() and
retries the ibmvtpm_send_crq() once.

Reported-by: Linh Pham <redacted>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: George Wilson <redacted>

What is LPM anyway?

It's PowerVM Live Partition Mobility.

/Jarkko

-- 
George Wilson
IBM Linux Technology Center
Security Development