linux-kernel - Re: [PATCH] TPM: ACPI/PNP dependency removal

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Date:	Thu, 13 May 2010 13:29:53 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Rajiv Andrade <srajiv@...ux.vnet.ibm.com>
CC:	linux-kernel@...r.kernel.org, jmorris@...ei.org,
	zohar@...ux.vnet.ibm.com
Subject: Re: [PATCH] TPM: ACPI/PNP dependency removal

Rajiv Andrade wrote:
> This patch pushes the ACPI dependency into the device driver code
> itself. Now, even without ACPI/PNP enabled, the device can be registered
> using the TIS specified memory space. This will however result in the
> lack of access to the bios event log, being the only implication of such
> ACPI removal.
> 
> Signed-off-by: Rajiv Andrade <srajiv@...ux.vnet.ibm.com>
> Acked-by: Mimi Zohar <zohar@...ux.vnet.ibm.com>
> ---
>  drivers/char/tpm/Kconfig   |    6 ++++--
>  drivers/char/tpm/tpm_tis.c |   42 ++++++++++++++++++++++--------------------
>  2 files changed, 26 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
> index f5fc64f..fffc994 100644
> --- a/drivers/char/tpm/Kconfig
> +++ b/drivers/char/tpm/Kconfig
> @@ -17,14 +17,16 @@ menuconfig TCG_TPM
>  	  obtained at: <http://sourceforge.net/projects/trousers>.  To 
>  	  compile this driver as a module, choose M here; the module 
>  	  will be called tpm. If unsure, say N.
> -	  Note: For more TPM drivers enable CONFIG_PNP, CONFIG_ACPI
> +	  Notes: 
> +	  1) For more TPM drivers enable CONFIG_PNP, CONFIG_ACPI
>  	  and CONFIG_PNPACPI.
> +	  2) Without ACPI enabled, the bios event log won't be accessible,

s/bios/BIOS/ please

> +	  which is required to validate the PCR 0-7 values.
>  
>  if TCG_TPM
>  
>  config TCG_TIS
>  	tristate "TPM Interface Specification 1.2 Interface"
> -	depends on PNP
>  	---help---
>  	  If you have a TPM security chip that is compliant with the
>  	  TCG TIS 1.2 TPM specification say Yes and it will be accessible

Thanks for the update.
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