From: Breno Leitao <leitao@debian.org>
To: linuxppc-dev@lists.ozlabs.org
Cc: mikey@neuling.org, paulus@ozlabs.org, gromero@linux.vnet.ibm.com,
mpe@ellerman.id.au, ldufour@linux.vnet.ibm.com,
Breno Leitao <leitao@debian.org>
Subject: [RFC PATCH 03/11] powerpc/tm: Recheckpoint when exiting from kernel
Date: Wed, 12 Sep 2018 16:40:11 -0300 [thread overview]
Message-ID: <1536781219-13938-4-git-send-email-leitao@debian.org> (raw)
In-Reply-To: <1536781219-13938-1-git-send-email-leitao@debian.org>
This is the only place we are going to recheckpoint now. Now the task
needs to have TIF_RESTORE_TM flag set, which will get into
restore_tm_state() and execute the recheckpoint if MSR shows that the
transaction was active.
Every time a task is required to recheckpoint, or just have the TM SPRs
restore, the TIF_RESTORE_TM flag should be set and the task MSR should
properly be in a transactional state, which will be checked by
restore_tm_state().
Signed-off-by: Breno Leitao <leitao@debian.org>
---
arch/powerpc/kernel/process.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 913c5725cdb2..f22f82ce174c 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1069,6 +1069,10 @@ void restore_tm_state(struct pt_regs *regs)
if (!MSR_TM_ACTIVE(regs->msr))
return;
+ tm_enable();
+ /* The only place we recheckpoint */
+ tm_recheckpoint(¤t->thread);
+
msr_diff = current->thread.ckpt_regs.msr & ~regs->msr;
msr_diff &= MSR_FP | MSR_VEC | MSR_VSX;
--
2.19.0
next prev parent reply other threads:[~2018-09-12 19:40 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 19:40 [RFC PATCH 00/11] New TM Model Breno Leitao
2018-09-12 19:40 ` [RFC PATCH 01/11] powerpc/tm: Reclaim transaction on kernel entry Breno Leitao
2018-09-18 1:31 ` Michael Neuling
2018-09-27 20:28 ` Breno Leitao
2018-09-27 20:28 ` Breno Leitao
2018-09-12 19:40 ` [RFC PATCH 02/11] powerpc/tm: Reclaim on unavailable exception Breno Leitao
2018-09-12 19:40 ` Breno Leitao [this message]
2018-09-12 19:40 ` [RFC PATCH 04/11] powerpc/tm: Always set TIF_RESTORE_TM on reclaim Breno Leitao
2018-09-12 19:40 ` [RFC PATCH 05/11] powerpc/tm: Function that updates the failure code Breno Leitao
2018-09-17 5:29 ` Michael Neuling
2018-09-18 1:29 ` Michael Neuling
2018-09-27 20:58 ` Breno Leitao
2018-09-28 5:27 ` Michael Neuling
2018-09-18 3:27 ` Michael Neuling
2018-09-12 19:40 ` [RFC PATCH 06/11] powerpc/tm: Refactor the __switch_to_tm code Breno Leitao
2018-09-18 4:04 ` Michael Neuling
2018-09-27 20:48 ` Breno Leitao
2018-09-12 19:40 ` [RFC PATCH 07/11] powerpc/tm: Do not recheckpoint at sigreturn Breno Leitao
2018-09-18 5:32 ` Michael Neuling
2018-09-12 19:40 ` [RFC PATCH 08/11] powerpc/tm: Do not reclaim on ptrace Breno Leitao
2018-09-18 5:36 ` Michael Neuling
2018-09-27 21:03 ` Breno Leitao
2018-09-28 5:36 ` Michael Neuling
2018-09-30 23:51 ` Breno Leitao
2018-10-01 0:34 ` Michael Neuling
2018-09-12 19:40 ` [RFC PATCH 09/11] powerpc/tm: Do not restore default DSCR Breno Leitao
2018-09-18 5:41 ` Michael Neuling
2018-09-27 20:51 ` Breno Leitao
2018-09-28 5:03 ` Michael Neuling
2018-09-12 19:40 ` [RFC PATCH 10/11] powerpc/tm: Set failure summary Breno Leitao
2018-09-18 5:50 ` Michael Neuling
2018-09-27 20:52 ` Breno Leitao
2018-09-28 5:17 ` Michael Neuling
2018-09-12 19:40 ` [RFC PATCH 11/11] selftests/powerpc: Adapt the test Breno Leitao
2018-09-18 6:36 ` Michael Neuling
2018-09-27 20:57 ` Breno Leitao
2018-09-28 5:25 ` Michael Neuling
2018-10-01 17:50 ` Breno Leitao
2018-09-17 5:25 ` [RFC PATCH 00/11] New TM Model Michael Neuling
2018-09-27 20:13 ` Breno Leitao
2018-09-27 20:13 ` Breno Leitao
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