arm-trusted-firmware/docs/design
Olivier Deprez 0fe7b9f2bc feat: pass SMCCCv1.3 SVE hint bit to dispatchers
SMCCCv1.3 introduces the SVE hint bit added to the SMC FID (bit 16)
denoting that the world issuing an SMC doesn't expect the callee to
preserve the SVE state (FFR, predicates, Zn vector bits greater than
127). Update the generic SMC handler to copy the SVE hint bit state
to SMC flags and mask out the bit by default for the services called
by the standard dispatcher. It is permitted by the SMCCC standard to
ignore the bit as long as the SVE state is preserved. In any case a
callee must preserve the NEON state (FPCR/FPSR, Vn 128b vectors)
whichever the SVE hint bit state.

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I2b163ed83dc311b8f81f96b23c942829ae9fa1b5
2022-11-08 09:28:36 +01:00
..
alt-boot-flows.rst doc: Split the User Guide into multiple files 2019-11-27 10:45:54 +00:00
auth-framework.rst Cleanup the code for TBBR CoT descriptors 2020-05-19 05:05:19 +01:00
cpu-specific-build-macros.rst fix(cpus): workaround for Cortex-A710 erratum 2291219 2022-10-27 13:46:52 +01:00
firmware-design.rst feat: pass SMCCCv1.3 SVE hint bit to dispatchers 2022-11-08 09:28:36 +01:00
index.rst doc: Split the User Guide into multiple files 2019-11-27 10:45:54 +00:00
interrupt-framework-design.rst Fix broken links to various sections across docs 2020-08-03 09:55:04 -05:00
psci-pd-tree.rst doc: Set correct syntax highlighting style 2019-05-22 11:28:17 +01:00
reset-design.rst docs(bl31): aarch64: RESET_TO_BL31_WITH_PARAMS 2022-04-29 22:54:34 +02:00
trusted-board-boot-build.rst docs(security): update info on use of OpenSSL 3.0 2022-07-15 18:09:18 -04:00
trusted-board-boot.rst fix: remove "experimental" tag for stable features 2021-10-22 10:49:20 +01:00