Re: [Qemu-devel] [RFC 00/10] MTTCG: Slow-path for atomic insns

[alvise rigo]

I might have broken something while rebasing on top of
enable-mttcg-for-armv7-v1.
I will sort this problem out.

Thank you,
alvise

On Fri, Jun 10, 2016 at 5:21 PM, Alex Bennée <address@hidden> wrote:
>
> Alvise Rigo <address@hidden> writes:
>
>> Hi,
>>
>> This series ports the latest iteration of the LL/SC work on top of the
>> latest MTTCG reference branch posted recently by Alex.
>>
>> These patches apply on top of the following series:
>>
>> - [RFC v1 00/12] Enable MTTCG for 32 bit arm on x86
>>   https://github.com/stsquad/qemu/tree/mttcg/enable-mttcg-for-armv7-v1
>> - [RFC v8 00/14] Slow-path for atomic instruction translation
>>   https://git.virtualopensystems.com/dev/qemu-mt/tree/\
>>   slowpath-for-atomic-v8-no-mttcg - only minor changes have been necessary
>> - Few recent patches from Emilio regarding the spinlock implementation
>>
>> Overall, these patches allow the LL/SC infrastructure to work in 
>> multi-threaded
>> mode (patches 01-02-04) and make TLB flushes to other VCPUs safe.
>>
>> Patch 03 introduces a new API to submit a work item to a VCPU and wait for 
>> its
>> completion. This API is used to query TLB flushes that result from the
>> emulation of some ARM instructions. Patches 07, 08 and 09 modify the current
>> tlb_flush_* functions to use the new API.  Patch 10 fixes a rare hang that I
>> was experiencing with this branch.
>>
>> The whole work can be fetched from the following repository:
>> address@hidden:dev/qemu-mt.git
>> at the branch "slowpath-for-atomic-v8-mttcg".
>
> Hmm this branch has build failures for linux-user and other
> architectures. Is this the latest one?
>
>>
>> Alvise Rigo (10):
>>   exec: Introduce tcg_exclusive_{lock,unlock}()
>>   softmmu_llsc_template.h: Move to multi-threading
>>   cpus: Introduce async_wait_run_on_cpu()
>>   cputlb: Introduce tlb_flush_other()
>>   target-arm: End TB after ldrex instruction
>>   cputlb: Add tlb_tables_flush_bitmap()
>>   cputlb: Query tlb_flush_by_mmuidx
>>   cputlb: Query tlb_flush_page_by_mmuidx
>>   cputlb: Query tlb_flush_page_all
>>   cpus: Do not sleep if some work item is pending
>>
>>  cpus.c                     |  48 ++++++++++-
>>  cputlb.c                   | 202 
>> ++++++++++++++++++++++++++++++++++-----------
>>  exec.c                     |  18 ++++
>>  include/exec/exec-all.h    |  13 +--
>>  include/qom/cpu.h          |  36 ++++++++
>>  softmmu_llsc_template.h    |  13 ++-
>>  softmmu_template.h         |   6 ++
>>  target-arm/helper.c        |  79 +++++++++---------
>>  target-arm/op_helper.c     |   6 ++
>>  target-arm/translate-a64.c |   2 +
>>  target-arm/translate.c     |   2 +
>>  11 files changed, 327 insertions(+), 98 deletions(-)
>
>
> --
> Alex Bennée