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From: "Cédric Le Goater" <clg@kaod.org>
To: Christophe Leroy <christophe.leroy@csgroup.eu>,
	"qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Cc: Thomas Huth <thuth@redhat.com>,
	Daniel Henrique Barboza <danielhb413@gmail.com>,
	Greg Kurz <groug@kaod.org>,
	David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH 00/15] ppc/ppc405: decade cleanup
Date: Mon, 20 Dec 2021 09:33:32 +0100	[thread overview]
Message-ID: <c2eeced6-9cfa-2ea6-88be-a4dfb3d7aca2@kaod.org> (raw)
In-Reply-To: <b3345770-21e2-39f2-8fe2-e9963886e680@csgroup.eu>

> 
> Don't know if this is the reason of our problems but I think there is
> something to investigate around timer interrupts:
> 
> 
> / # cat /proc/interrupts
>              CPU0
>    16:         68       UIC   1 Level     serial
> LOC:          0   Local timer interrupts for timer event device
> LOC:          0   Local timer interrupts for others
> SPU:          0   Spurious interrupts
> PMI:          0   Performance monitoring interrupts
> MCE:          0   Machine check exceptions
> 
> Any idea what the problem can be ? How does QEMU generates timer
> interrupts ?

I did some archeology and fixed the 405 timer (PIT). Please see commits in :

   https://github.com/legoater/qemu/commits/ppc405

but we are still getting segfaults. At some point /init tries to load from
fffffe04 which is obviously wrong.

Add -d int,mmu to have more info from QEMU internals.

I have gathered some info on this page :

   https://github.com/legoater/qemu/wiki/ref405ep

Thanks,

C.


  parent reply	other threads:[~2021-12-20 17:43 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-06 10:36 [PATCH 00/15] ppc/ppc405: decade cleanup Cédric Le Goater
2021-12-06 10:36 ` [PATCH 01/15] ppc/ppc405: Change kernel load address Cédric Le Goater
2021-12-06 10:36 ` [PATCH 02/15] ppc: Mark the 'taihu' machine as deprecated Cédric Le Goater
2021-12-23  6:55   ` Philippe Mathieu-Daudé
2021-12-06 10:37 ` [PATCH 03/15] ppc: Add trace-events for DCR accesses Cédric Le Goater
2021-12-06 13:17   ` Philippe Mathieu-Daudé
2021-12-06 10:37 ` [PATCH 04/15] ppc/ppc405: Convert printfs to trace-events Cédric Le Goater
2021-12-06 10:37 ` [PATCH 05/15] ppc/ppc405: Drop flag parameter in ppc405_set_bootinfo() Cédric Le Goater
2021-12-06 13:18   ` Philippe Mathieu-Daudé
2021-12-06 10:37 ` [PATCH 06/15] ppc/ppc405: Change ppc405ep_init() return value Cédric Le Goater
2021-12-06 10:37 ` [PATCH 07/15] ppc/ppc405: Add some address space definitions Cédric Le Goater
2021-12-06 13:20   ` Philippe Mathieu-Daudé
2021-12-06 15:05   ` BALATON Zoltan
2021-12-07  6:46     ` Cédric Le Goater
2021-12-06 10:37 ` [PATCH 08/15] ppc/ppc405: Remove flash support Cédric Le Goater
2021-12-06 10:37 ` [PATCH 09/15] ppc/ppc405: Rework FW load Cédric Le Goater
2021-12-06 10:37 ` [PATCH 10/15] ppc/ppc405: Introduce ppc405_set_default_bootinfo() Cédric Le Goater
2021-12-06 10:37 ` [PATCH 11/15] ppc/ppc405: Fix boot from kernel Cédric Le Goater
2021-12-06 15:16   ` BALATON Zoltan
2021-12-07  6:52     ` Cédric Le Goater
2021-12-06 10:37 ` [PATCH 12/15] ppc/ppc405: Change default PLL values at reset Cédric Le Goater
2021-12-06 10:37 ` [PATCH 13/15] ppc/ppc405: Fix bi_pci_enetaddr2 field in U-Boot board information Cédric Le Goater
2021-12-06 13:25   ` Philippe Mathieu-Daudé
2021-12-06 10:37 ` [PATCH 14/15] ppc/ppc405: Add update of bi_procfreq field Cédric Le Goater
2021-12-06 10:37 ` [PATCH 15/15] ppc/ppc405: Update U-Boot board information for hotfoot Cédric Le Goater
2021-12-06 13:27   ` Philippe Mathieu-Daudé
2021-12-06 13:37     ` Cédric Le Goater
2021-12-06 13:40       ` Thomas Huth
2021-12-06 15:20         ` Cédric Le Goater
2021-12-15 16:49 ` [PATCH 00/15] ppc/ppc405: decade cleanup Cédric Le Goater
2021-12-17 16:36   ` Christophe Leroy
2021-12-17 17:18     ` Cédric Le Goater
2021-12-18  9:33       ` Cédric Le Goater
2021-12-20  8:33     ` Cédric Le Goater [this message]
2021-12-20 18:07       ` Philippe Mathieu-Daudé
2021-12-20 18:18         ` Cédric Le Goater

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