[Minios-devel] [UNIKRAFT PATCH v4 0/7] Support float point on arm64 kvm plat

[Jia He <justin.he@xxxxxxx>]

This series is to enable the float point support on arm64 kvm plat.

The key point is the patch 3 and 4

Tested on a ThundX2 qemu "-M virt" guest machine.
qemu command line:/usr/local/bin/qemu-system-aarch64  \
-machine virt,gic-version=2 -m 1024 -cpu max -no-acpi -smp 1 \
-display none  -nographic -nodefaults -serial stdio \
-kernel build/helloworld_kvm-arm64

I created a app with 2 threads, and then print their local double/float
variables. Looks fine to me.

Changes:
v4: address most of the comments from Sharan
 - change the fp_save/restore_store as per freebsd way
 - refine the help msg in patch 1
 - add r-b for patch 5,6,7
 - s/CONFIG_FLOAT_POINT/CONFIG_FPSIMD/g
v3: rebase to latest staging branch
v2: remove RFC tag.
 - utilize 'isr' variant feature introduced by Simon, this addresses the
mgeneral-regs-only issue in v1.
 - refactor the save/restore codes due to license issue.

Jia He (7):
  plat: build: Add a config option to enable fp on arm64
  build: Link libgcc at the end of the link options list
  plat/kvm: arm64: Enable the fp/simd at the starting point
  plat/arm: Support fp/simd save/restore during context switch
  arch/arm64: Don't pass -mgeneral-regs-only when CONFIG_FLOAT_POINT is
    y
  arch/arm64: Fix -mfpu=none when not supporting fpsimd
  build: Add 'isr' variant for arm64 kvm plat source files called within
    irq context

 arch/arm/arm64/Makefile.uk          |  7 ++-
 plat/Config.uk                      |  7 +++
 plat/common/arm/fp_arm64.c          | 82 +++++++++++++++++++++++++++++
 plat/common/arm/thread_start64.S    |  1 +
 plat/common/include/arm/arm64/cpu.h | 46 +++++++++++++++-
 plat/kvm/Linker.uk                  |  2 +
 plat/kvm/Makefile.uk                | 11 ++--
 plat/kvm/arm/entry64.S              |  8 +++
 8 files changed, 155 insertions(+), 9 deletions(-)
 create mode 100644 plat/common/arm/fp_arm64.c

-- 
2.17.1


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