[SeaBIOS] [PATCH v2 03/10] tpm: Prepare code for TPM 2 functions
Kevin O'Connor
kevin at koconnor.net
Mon Feb 1 22:54:53 CET 2016
On Fri, Jan 22, 2016 at 05:47:13PM -0500, Stefan Berger wrote:
> From: Stefan Berger <stefanb at linux.vnet.ibm.com>
>
> This patch prepares the tcgbios.c file for extension with TPM 2
> specific code by:
>
> o prefixing all TPM 1.2 specific functions with tpm12_
> o where necessary, introduce switch statements in tpm_ - prefixed functions;
> here we branch into TPM versions specific code
> o introduce tpm_ - prefixed functions where necessary; mostly in those
> cases where tpm12_ functions are too large and where the tpm_ function
> then only holds the switch statement
> o leave FIXMEs where we need to write TPM 2 specific code; subsequent patches
> will replace those FIXMEs
>
> Signed-off-by: Stefan Berger <stefanb at linux.vnet.ibm.com>
> ---
> src/tcgbios.c | 311 +++++++++++++++++++++++++++++++++++++---------------------
> 1 file changed, 199 insertions(+), 112 deletions(-)
>
> diff --git a/src/tcgbios.c b/src/tcgbios.c
> index 799a8bf..7f314b7 100644
> --- a/src/tcgbios.c
> +++ b/src/tcgbios.c
> @@ -171,7 +171,15 @@ tpm_is_working(void)
> int
> tpm_can_show_menu(void)
> {
> - return tpm_is_working() && TPM_has_physical_presence;
> + switch (TPM_version) {
> + case TPM_VERSION_NONE:
> + return 0;
I find these "case TPM_VERSION_NONE:" clauses to be a little
confusing, both in this patches and the later patches, because I don't
think any of these additional code paths are reachable. I think it
would be better to just have the branches that are active (ie, v1.2
and v2).
-Kevin
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