Re: [PATCH] tpm: Detach page allocation from tpm_buf

[Jarkko Sakkinen]

On Thu, Sep 26, 2019 at 08:23:24PM +0300, Jarkko Sakkinen wrote:
> As has been seen recently, binding the buffer allocation and tpm_buf
> together is sometimes far from optimal. The buffer might come from the
> caller namely when tpm_send() is used by another subsystem. In addition we
> can stability in call sites w/o rollback (e.g. power events)>
> 
> Take allocation out of the tpm_buf framework and make it purely a wrapper
> for the data buffer.
> 
> Link: https://patchwork.kernel.org/patch/11146585/
> Cc: Mimi Zohar <zohar@xxxxxxxxxxxxx>
> Cc: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
> Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
> Cc: Sumit Garg <sumit.garg@xxxxxxxxxx>
> Cc: Stefan Berger <stefanb@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
> ---
> v2:
> * In tpm2_get_random(), TPM2_CC_GET_RANDOM was accidently switch to
>   TPM2_CC_PCR_EXTEND. Now it has been switched back.
Forgot --subject-prefix="PATCH v2".

/Jarkko