[PATCH v1 0/2] arm64: Implement SMCCC v1.3 SVE register saving hint

[Mark Brown]

SMCCC v1.3 provides support for a flag which allows the caller to say
that there is no state that needs to be preserved in the SVE registers,
meaning that the called code can skip doing this, especially with larger
vector lengths this can save a noticable amount of work in the event
that the state needs to be saved. Implement support for this, using the
TIF_ flags to report if there is live SVE state present.

Mark Brown (2):
  arm64: asmlinkage: Enable use of BTI_C macro in SYM_CODE
  arm64: smccc: Support SMCCC v1.3 SVE register saving hint

 arch/arm64/include/asm/linkage.h |  4 ++++
 arch/arm64/kernel/smccc-call.S   | 39 ++++++++++++++++++++++++++++++++
 drivers/firmware/smccc/smccc.c   |  4 ++++
 include/linux/arm-smccc.h        | 22 ++++++++++++++++--
 4 files changed, 67 insertions(+), 2 deletions(-)


base-commit: d07f6ca923ea0927a1024dfccafc5b53b61cfecc
-- 
2.20.1