linux-kernel - Re: [PATCH v2] Fix fTPM on AMD Zen+ CPUs

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Message-ID: <CAHjaAcSixHporRbU0Y-h-NKRQR2pHqti2qnEtowc2oZkiPOORA@mail.gmail.com>
Date:   Mon, 16 Sep 2019 18:43:36 +0900
From:   Seunghun Han <kkamagui@...il.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     Vanya Lazeev <ivan.lazeev@...il.com>, arnd@...db.de,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        "open list:TPM DEVICE DRIVER" <linux-integrity@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Huewe <peterhuewe@....de>
Subject: Re: [PATCH v2] Fix fTPM on AMD Zen+ CPUs

> Eessentially what you want to do is to detach and backup the original
> NVS resources and put them back to the list with insert_resource() when
> tpm_crb is removed. At least I think this is what should be done but you
> should CC your patch also to the ACPI list for feedback.
>
> /Jarkko

Yes, you are right. But, what I really want to do is requesting
command/response buffer regions from NVS driver and releasing them. To
detach and backup the original NVS resources with insert_resource() or
remove_resource() are not needed maybe.

I have some idea about it, so I have sent an email to you. Would you
check the email and give comments? The link is here,
https://lkml.org/lkml/2019/9/16/112 .

Seunghun