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Re: [Qemu-devel] [PATCH 4/9] coroutine: add host specific coroutine back
From: |
Richard Henderson |
Subject: |
Re: [Qemu-devel] [PATCH 4/9] coroutine: add host specific coroutine backend for 64-bit ARM |
Date: |
Sun, 5 May 2019 10:00:50 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |
On 5/4/19 5:05 AM, Paolo Bonzini wrote:
> The speedup is similar to x86, 120 ns vs 180 ns on an APM Mustang.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
> configure | 2 +-
> scripts/qemugdb/coroutine_asm.py | 6 ++++-
> util/Makefile.objs | 2 ++
> util/coroutine-asm.c | 45 ++++++++++++++++++++++++++++++++
> 4 files changed, 53 insertions(+), 2 deletions(-)
Reviewed-by: Richard Henderson <address@hidden>
> + "ldr x30, [x1, %[SCRATCH]]\n" /* load destination PC */ \
> + "ldr x1, [x1, %[SP]]\n" /* load destination SP */ \
> + "mov sp, x1\n" \
> + "br x30\n" \
> + "2: \n" \
For future reference, "bti j" (aka hint #36) goes here,
for the aarch64 branch target identification extension.
r~
- [Qemu-devel] [PATCH 0/9] Assembly coroutine backend and x86 CET support, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 1/9] qemugdb: allow adding support for other coroutine backends, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 2/9] qemugdb: allow adding support for other architectures, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 3/9] coroutine: add host specific coroutine backend for 64-bit x86, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 4/9] coroutine: add host specific coroutine backend for 64-bit ARM, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 5/9] coroutine: add host specific coroutine backend for 64-bit s390, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 6/9] configure: add control-flow protection support, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 8/9] tcg/i386: add support for IBT, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 7/9] tcg: add tcg_out_start, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 9/9] linux-user: add IBT support to x86 safe-syscall.S, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 10/9] coroutine-asm: add x86 CET shadow stack support, Paolo Bonzini, 2019/05/04
- Re: [Qemu-devel] [PATCH 0/9] Assembly coroutine backend and x86 CET support, Alex Bennée, 2019/05/05