From: Nicholas Piggin <npiggin@gmail.com>
To: Christophe Leroy <christophe.leroy@csgroup.eu>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v3 03/19] powerpc: bad_page_fault, do_break get registers from regs
Date: Sat, 26 Dec 2020 20:58:00 +1000 [thread overview]
Message-ID: <1608980023.nlrgl4pzi1.astroid@bobo.none> (raw)
In-Reply-To: <1608970380.delquel806.astroid@bobo.none>
Excerpts from Nicholas Piggin's message of December 26, 2020 6:19 pm:
> Excerpts from Christophe Leroy's message of December 23, 2020 12:42 am:
>>
>>
>> Le 28/11/2020 à 15:40, Nicholas Piggin a écrit :
>>> Similar to the previous patch this makes interrupt handler function
>>> types more regular so they can be wrapped with the next patch.
>>>
>>> bad_page_fault and do_break are not performance critical.
>>
>> I partly took your changes into one of my series, in different order though.
>>
>> Please have a look at https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=221656 patches
>> 4 to 7
>
> Thanks, I had a look. Seems like the result is basically the same as my
> series, so that's good if you like the end result now :)
>
>> I think some of the changes are missing in your series, especially the changes in entry_32.S from
>> patch 7.
>
> Okay I could take them in. In your patch 7/15, why do you leave this
> load of DSISR?
>
> diff --git a/arch/powerpc/kernel/head_book3s_32.S b/arch/powerpc/kernel/head_book3s_32.S
> index 15e6003fd3b8..0133a02d1d47 100644
> --- a/arch/powerpc/kernel/head_book3s_32.S
> +++ b/arch/powerpc/kernel/head_book3s_32.S
> @@ -369,9 +369,9 @@ BEGIN_MMU_FTR_SECTION
> END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE)
> #endif
> #endif /* CONFIG_VMAP_STACK */
> -1: mr r4,r12
> andis. r5,r9,DSISR_SRR1_MATCH_32S@h /* Filter relevant SRR1 bits */
> - stw r4, _DAR(r11)
> + stw r12, _DAR(r11)
> + stw r5, _DSISR(r11)
> EXC_XFER_LITE(0x400, handle_page_fault)
>
> /* External interrupt */
> @@ -693,7 +693,6 @@ handle_page_fault_tramp_1:
> #ifdef CONFIG_VMAP_STACK
> EXCEPTION_PROLOG_2 handle_dar_dsisr=1
> #endif
> - lwz r4, _DAR(r11)
> lwz r5, _DSISR(r11)
> ^^^^^^^^^^^^^^^^^^^^^^
> /* fall through */
> handle_page_fault_tramp_2:
>
> ?
Ah never mind, this needs to come back after your DABR match move
patch, which you have earlier in the series. I confused myself.
I'll rebase my series on your patch 4 rather than have it squashed
in with other do_break stuff.
Thanks,
Nick
next prev parent reply other threads:[~2020-12-26 10:59 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-28 14:40 [PATCH v3 00/19] powerpc: interrupt wrappers Nicholas Piggin
2020-11-28 14:40 ` [PATCH v3 01/19] powerpc/64s: move the last of the page fault handling logic to C Nicholas Piggin
2020-11-30 7:35 ` Aneesh Kumar K.V
2020-11-28 14:40 ` [PATCH v3 02/19] powerpc: remove arguments from fault handler functions Nicholas Piggin
2020-11-30 7:35 ` Aneesh Kumar K.V
2020-11-28 14:40 ` [PATCH v3 03/19] powerpc: bad_page_fault, do_break get registers from regs Nicholas Piggin
2020-11-30 7:36 ` Aneesh Kumar K.V
2020-12-22 14:42 ` Christophe Leroy
2020-12-26 8:19 ` Nicholas Piggin
2020-12-26 10:58 ` Nicholas Piggin [this message]
2020-11-28 14:40 ` [PATCH v3 04/19] powerpc/perf: move perf irq/nmi handling details into traps.c Nicholas Piggin
2020-12-16 7:17 ` Athira Rajeev
2020-11-28 14:41 ` [PATCH v3 05/19] powerpc: interrupt handler wrapper functions Nicholas Piggin
2020-11-30 7:37 ` Aneesh Kumar K.V
2020-12-04 8:31 ` Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 06/19] powerpc: add interrupt wrapper entry / exit stub functions Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 07/19] powerpc: add interrupt_cond_local_irq_enable helper Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 08/19] powerpc/64: context tracking remove _TIF_NOHZ Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 09/19] powerpc/64: context tracking move to interrupt wrappers Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 10/19] powerpc/64: add context tracking to asynchronous interrupts Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 11/19] powerpc: handle irq_enter/irq_exit in interrupt handler wrappers Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 12/19] powerpc/64s: move context tracking exit to interrupt exit path Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 13/19] powerpc/64s: reconcile interrupts in C Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 14/19] powerpc/64: move account_stolen_time into its own function Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 15/19] powerpc/64: entry cpu time accounting in C Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 16/19] powerpc: move NMI entry/exit code into wrapper Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 17/19] powerpc/64s: move NMI soft-mask handling to C Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 18/19] powerpc/64s: runlatch interrupt handling in C Nicholas Piggin
2020-11-28 14:41 ` [PATCH v3 19/19] powerpc/64s: power4 nap fixup " Nicholas Piggin
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