[v4,0/3] xsm: refactor and optimize policy loading

Message

Daniel P. Smith May 31, 2022, 6:20 p.m. UTC

This series was born out of some cleanup work done while crafting the
hyperlaunch boot modules patch series. The primary purpose of this series was
to stop walking all boot modules when it was not necessary, but the scope
creeped during review.

Changes in v4:
* rewroked xsm_{multiboot,dt}_init() to support flask=late
* applied the correct types to the policy_buffer for DT
* change type from array to pointer on xsm_multiboot_policy_init()

Changes in v3:
* added arm Rb for patch #3
* mainly a resend due to fubar on sending v2

Changes in v2:
* changed init_policy to policy_file_required
* split the patch into a series
* corrected casting of policy buffer
* use IS_ENABLED() instead of #ifdef sequence
* moved #ifdef inside of braces for xsm_dt_policy_init()
* addressed lack of error handling of xsm{mb,dt}_init()

Daniel P. Smith (3):
  xsm: only search for a policy file when needed
  xsm: consolidate loading the policy buffer
  xsm: properly handle error from XSM init

 xen/arch/arm/setup.c  | 10 ++---
 xen/arch/x86/setup.c  |  9 ++++-
 xen/include/xsm/xsm.h |  2 +-
 xen/xsm/xsm_core.c    | 89 ++++++++++++++++++++++++-------------------
 xen/xsm/xsm_policy.c  | 34 ++++++++++++++---
 5 files changed, 91 insertions(+), 53 deletions(-)