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From: Jarkko Sakkinen <>
To: Matthew Garrett <>
Cc:,,,, Matthew Garrett <>
Subject: Re: [PATCH V3 2/4] tpm: Reserve the TPM final events table
Date: Wed, 13 Feb 2019 12:57:22 +0200
Message-ID: <> (raw)
In-Reply-To: <>

On Mon, Feb 11, 2019 at 01:55:16PM -0800, Matthew Garrett wrote:
> From: Matthew Garrett <>
> UEFI systems provide a boot services protocol for obtaining the TPM
> event log, but this is unusable after ExitBootServices() is called.
> Unfortunately ExitBootServices() itself triggers additional TPM events
> that then can't be obtained using this protocol. The platform provides a
> mechanism for the OS to obtain these events by recording them to a
> separate UEFI configuration table which the OS can then map.
> Unfortunately this table isn't self describing in terms of providing its
> length, so we need to parse the events inside it to figure out how long
> it is. Since the table isn't mapped at this point, we need to extend the
> length calculation function to be able to map the event as it goes
> along.
> Signed-off-by: Matthew Garrett <>

Reviewed-by: Jarkko Sakkinen <>


  reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-11 21:55 [PATCH V3] Add support for TPM2 event logs on EFI systems Matthew Garrett
2019-02-11 21:55 ` [PATCH V3 1/4] tpm: Abstract crypto agile event size calculations Matthew Garrett
2019-02-13 10:35   ` Jarkko Sakkinen
2019-02-11 21:55 ` [PATCH V3 2/4] tpm: Reserve the TPM final events table Matthew Garrett
2019-02-13 10:57   ` Jarkko Sakkinen [this message]
2019-02-11 21:55 ` [PATCH V3 3/4] tpm: Append the final event log to the TPM event log Matthew Garrett
2019-02-13 10:46   ` Jarkko Sakkinen
2019-02-11 21:55 ` [PATCH V3 4/4] efi: Attempt to get the TCG2 event log in the boot stub Matthew Garrett
2019-02-13 10:37   ` Jarkko Sakkinen
2019-02-19 11:56 ` [PATCH V3] Add support for TPM2 event logs on EFI systems Jarkko Sakkinen
2019-02-19 11:59   ` Jarkko Sakkinen
2019-02-20 19:28   ` Matthew Garrett
2019-02-21 12:16     ` Jarkko Sakkinen
2019-02-22 19:24       ` Matthew Garrett

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