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Message-ID: <20200227162339.GF5140@linux.intel.com>
Date: Thu, 27 Feb 2020 18:23:39 +0200
From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To: George Wilson <gcwilson@...ux.ibm.com>
Cc: linux-integrity@...r.kernel.org,
Alexey Kardashevskiy <aik@...abs.ru>,
Stefan Berger <stefanb@...ux.ibm.com>,
Nayna Jain <nayna@...ux.vnet.ibm.com>,
Jason Gunthorpe <jgg@...pe.ca>, linux-kernel@...r.kernel.org,
Linh Pham <phaml@...ibm.com>
Subject: Re: [PATCH] tpm: ibmvtpm: retry on H_CLOSED in tpm_ibmvtpm_send()
On Thu, Feb 27, 2020 at 10:50:03AM -0500, George Wilson wrote:
> 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 <phaml@...ibm.com>
> Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>
> Signed-off-by: George Wilson <gcwilson@...ux.ibm.com>
What is LPM anyway?
/Jarkko
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