From: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
To: qemu-ppc@nongnu.org, alex.bennee@linaro.org,
david@gibson.dropbear.id.au, rth@twiddle.net
Cc: qemu-devel@nongnu.org, nikunj@linux.vnet.ibm.com,
benh@kernel.crashing.org
Subject: [Qemu-devel] [PATCH RFC 0/4] Enable MTTCG on PowerPC
Date: Fri, 2 Sep 2016 12:02:52 +0530 [thread overview]
Message-ID: <1472797976-24210-1-git-send-email-nikunj@linux.vnet.ibm.com> (raw)
The series is a first attempt at enabling Multi-Threaded TCG on PowerPC.
Changes that were needed to enable PowerPC are pretty simple;
Patch 01: Take a iothread lock during hcall, as hcall can generate io requests
02: For TCG, we were harcoding smt as 1, this gets rid of the limitation
03: Use atomic_cmpxchg in store conditional
04: With more threads, flush the entry from each cpu.
This can be optimized further.
The patches are based on the Alex Bennee's base enabling patches for
MTTCG[1] and Emilios's cmpxchg atomics. The consolidated tree of the
above patches is here:
https://github.com/stsquad/qemu/tree/mttcg/base-patches-v4-with-cmpxchg-atomics-v2
Apart from the above, PPC patches are based out of ppc-for-2.8 and
load/store consolidation patches [2]
Series with all dependent patches available here:
https://github.com/nikunjad/qemu/tree/ppc_mttcg_v1
Testing:
========
-smp 4,cores=1,threads=4 -accel tcg,thread=multi
TODO
====
Implement msgsndp instructions(door-bell), newer kernels enable it
depending on the PVR. I have been using following workaround to boot.
https://github.com/nikunjad/qemu/commit/2c10052c5f93418a6b920e6ba3ce1813fcf50bc4
[1] https://www.mail-archive.com/qemu-devel@nongnu.org/msg391966.html
[2] https://lists.gnu.org/archive/html/qemu-ppc/2016-08/msg00265.html
Nikunj A Dadhania (4):
spapr-hcall: take iothread lock during handler call
target-ppc: with MTTCG report more threads
target-ppc: use atomic_cmpxchg for ld/st reservation
target-ppc: flush tlb from all the cpu
cputlb.c | 15 +++++++++++++++
hw/ppc/spapr_hcall.c | 11 +++++++++--
include/exec/exec-all.h | 2 ++
target-ppc/kvm.c | 2 +-
target-ppc/kvm_ppc.h | 2 +-
target-ppc/mmu-hash64.c | 2 +-
target-ppc/translate.c | 24 +++++++++++++++++++++---
7 files changed, 50 insertions(+), 8 deletions(-)
--
2.7.4
next reply other threads:[~2016-09-02 6:33 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-02 6:32 Nikunj A Dadhania [this message]
2016-09-02 6:32 ` [Qemu-devel] [PATCH RFC 1/4] spapr-hcall: take iothread lock during handler call Nikunj A Dadhania
2016-09-02 8:53 ` Greg Kurz
2016-09-02 9:28 ` Nikunj A Dadhania
2016-09-02 9:57 ` Greg Kurz
2016-09-03 16:31 ` Nikunj A Dadhania
2016-09-02 10:06 ` Thomas Huth
2016-09-03 16:33 ` Nikunj A Dadhania
2016-09-02 6:32 ` [Qemu-devel] [PATCH RFC 2/4] target-ppc: with MTTCG report more threads Nikunj A Dadhania
2016-09-02 9:28 ` Greg Kurz
2016-09-02 9:34 ` Nikunj A Dadhania
2016-09-02 10:45 ` Greg Kurz
2016-09-03 16:34 ` Nikunj A Dadhania
2016-09-07 3:51 ` David Gibson
2016-09-07 4:41 ` Nikunj A Dadhania
2016-09-02 6:32 ` [Qemu-devel] [PATCH RFC 3/4] target-ppc: use atomic_cmpxchg for ld/st reservation Nikunj A Dadhania
2016-09-07 4:02 ` David Gibson
2016-09-07 4:47 ` Nikunj A Dadhania
2016-09-07 5:24 ` Benjamin Herrenschmidt
2016-09-07 8:42 ` Nikunj A Dadhania
2016-09-07 5:34 ` David Gibson
2016-09-07 7:13 ` Alex Bennée
2016-09-12 1:19 ` David Gibson
2016-09-12 8:39 ` Alex Bennée
2016-09-12 9:15 ` Benjamin Herrenschmidt
2016-09-02 6:32 ` [Qemu-devel] [PATCH RFC 4/4] target-ppc: flush tlb from all the cpu Nikunj A Dadhania
2016-09-02 7:22 ` Benjamin Herrenschmidt
2016-09-02 7:34 ` Nikunj A Dadhania
2016-09-04 17:00 ` Alex Bennée
2016-09-04 22:17 ` Benjamin Herrenschmidt
2016-09-05 0:10 ` Benjamin Herrenschmidt
2016-09-06 1:55 ` Nikunj A Dadhania
2016-09-06 3:05 ` Benjamin Herrenschmidt
2016-09-06 4:53 ` Nikunj A Dadhania
2016-09-06 5:30 ` Benjamin Herrenschmidt
2016-09-06 6:57 ` Nikunj A Dadhania
2016-09-02 6:43 ` [Qemu-devel] [PATCH RFC 0/4] Enable MTTCG on PowerPC Cédric Le Goater
2016-09-02 6:46 ` Nikunj A Dadhania
2016-09-02 7:57 ` Thomas Huth
2016-09-02 11:44 ` Cédric Le Goater
2016-09-02 7:19 ` Benjamin Herrenschmidt
2016-09-02 7:39 ` Nikunj A Dadhania
2016-09-02 12:13 ` Benjamin Herrenschmidt
2016-09-07 4:08 ` David Gibson
2016-09-07 4:48 ` Nikunj A Dadhania
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