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Re: [Qemu-devel] [PATCH v8 2/5] tpm: implement virtual memory device for

From: Marc-André Lureau
Subject: Re: [Qemu-devel] [PATCH v8 2/5] tpm: implement virtual memory device for TPM PPI
Date: Tue, 17 Jul 2018 12:39:25 +0200


On Tue, Jul 17, 2018 at 12:03 PM, Igor Mammedov <address@hidden> wrote:
> On Mon, 16 Jul 2018 14:59:45 +0200
> Marc-André Lureau <address@hidden> wrote:
>> From: Stefan Berger <address@hidden>
>> Implement a virtual memory device for the TPM Physical Presence interface.
>> The memory is located at 0xFED45000 and used by ACPI to send messages to the
>> firmware (BIOS) and by the firmware to provide parameters for each one of
>> the supported codes.
> ...
> another question wrt E820 table, is firmware putting a reservation record
> for this RAM area overlay or should we do it QEMU?

There doesn't seem to be any reservation done in ovmf, or on my
laptop. I also wonder if it should be done. And how OS deal with that
today (/proc/iomem is correct).

Laszlo, any idea?

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