mbox series

[v3,0/2] tpm: Detach page allocation from tpm_buf

Message ID 20191003185103.26347-1-jarkko.sakkinen@linux.intel.com (mailing list archive)
Headers show
Series tpm: Detach page allocation from tpm_buf | expand

Message

Jarkko Sakkinen Oct. 3, 2019, 6:51 p.m. UTC 
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@linux.ibm.com>
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Sumit Garg <sumit.garg@linaro.org>
Cc: Stefan Berger <stefanb@linux.vnet.ibm.com>

Jarkko Sakkinen (2):
  tpm: Use GFP_KERNEL for allocating struct tpm_buf
  tpm: Detach page allocation from tpm_buf

 drivers/char/tpm/tpm-sysfs.c      |  19 ++-
 drivers/char/tpm/tpm.h            |  40 ++---
 drivers/char/tpm/tpm1-cmd.c       | 114 +++++++++----
 drivers/char/tpm/tpm2-cmd.c       | 265 +++++++++++++++++++-----------
 drivers/char/tpm/tpm2-space.c     |  64 +++++---
 drivers/char/tpm/tpm_vtpm_proxy.c |  24 +--
 6 files changed, 333 insertions(+), 193 deletions(-)