From: Guenter Roeck <linux@roeck-us.net>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
dja@axtens.net, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org
Subject: Re: [PATCH v5 17/17] powerpc/32s: Enable CONFIG_VMAP_STACK
Date: Thu, 6 Feb 2020 12:31:46 -0800 [thread overview]
Message-ID: <20200206203146.GA23248@roeck-us.net> (raw)
In-Reply-To: <2e2509a242fd5f3e23df4a06530c18060c4d321e.1576916812.git.christophe.leroy@c-s.fr>
On Sat, Dec 21, 2019 at 08:32:38AM +0000, Christophe Leroy wrote:
> A few changes to retrieve DAR and DSISR from struct regs
> instead of retrieving them directly, as they may have
> changed due to a TLB miss.
>
> Also modifies hash_page() and friends to work with virtual
> data addresses instead of physical ones. Same on load_up_fpu()
> and load_up_altivec().
>
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
This patch results in qemu boot failures (mac99 with pmac32_defconfig).
Images fail silently; there is no console output. Reverting the patch
fixes the problem. Bisect log is attached below.
Assuming this was tested on real hardware, am I correct to assume that qemu
for ppc32 (more specifically, qemu's mac99 and g3beige machines) no longer
works with the upstream kernel ?
Thanks,
Guenter
---
# bad: [33b40134e5cfbbccad7f3040d1919889537a3df7] Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
# good: [d4e9056daedca3891414fe3c91de3449a5dad0f2] initramfs: do not show compression mode choice if INITRAMFS_SOURCE is empty
git bisect start '33b40134e5cf' 'd4e9056daedc'
# good: [9717c1cea16e3eae81ca226f4c3670bb799b61ad] Merge tag 'drm-next-2020-02-04' of git://anongit.freedesktop.org/drm/drm
git bisect good 9717c1cea16e3eae81ca226f4c3670bb799b61ad
# bad: [4c25df5640ae6e4491ee2c50d3f70c1559ef037d] Merge branch 'topic/user-access-begin' into next
git bisect bad 4c25df5640ae6e4491ee2c50d3f70c1559ef037d
# good: [846a17a53aeeee426cbc1252f517a6660eab1427] powerpc/powernv: Use common code for the symbol_map export
git bisect good 846a17a53aeeee426cbc1252f517a6660eab1427
# good: [afe1ec5ab83029baf0f8368a255dc6b998bde576] powerpc/8xx: Split breakpoint exception
git bisect good afe1ec5ab83029baf0f8368a255dc6b998bde576
# bad: [43e76cd368fbb67e767da5363ffeaa3989993c8c] powerpc: Do not consider weak unresolved symbol relocations as bad
git bisect bad 43e76cd368fbb67e767da5363ffeaa3989993c8c
# bad: [af1725d2493dcad4eeb7e63141678181fcd8a2ff] powerpc/kconfig: Move CONFIG_PPC32 into Kconfig.cputype
git bisect bad af1725d2493dcad4eeb7e63141678181fcd8a2ff
# good: [94dd54c51a410b9ffa6356c3ed2ab0317f998ded] powerpc/32s: Avoid crossing page boundary while changing SRR0/1.
git bisect good 94dd54c51a410b9ffa6356c3ed2ab0317f998ded
# bad: [0f9aee0cb9da7db7d96f63cfa2dc5e4f1bffeb87] powerpc/mm: Don't log user reads to 0xffffffff
git bisect bad 0f9aee0cb9da7db7d96f63cfa2dc5e4f1bffeb87
# bad: [cd08f109e26231b279bcc0388428afcac6408ec6] powerpc/32s: Enable CONFIG_VMAP_STACK
git bisect bad cd08f109e26231b279bcc0388428afcac6408ec6
# first bad commit: [cd08f109e26231b279bcc0388428afcac6408ec6] powerpc/32s: Enable CONFIG_VMAP_STACK
next prev parent reply other threads:[~2020-02-06 20:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-21 8:32 [PATCH v5 00/17] Enable CONFIG_VMAP_STACK on PPC32 Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 01/17] powerpc/32: replace MTMSRD() by mtmsr Christophe Leroy
2020-01-29 5:17 ` Michael Ellerman
2019-12-21 8:32 ` [PATCH v5 02/17] powerpc/32: Add EXCEPTION_PROLOG_0 in head_32.h Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 03/17] powerpc/32: save DEAR/DAR before calling handle_page_fault Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 04/17] powerpc/32: move MSR_PR test into EXCEPTION_PROLOG_0 Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 05/17] powerpc/32: add a macro to get and/or save DAR and DSISR on stack Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 06/17] powerpc/32: prepare for CONFIG_VMAP_STACK Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 07/17] powerpc: align stack to 2 * THREAD_SIZE with VMAP_STACK Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 08/17] powerpc/32: Add early stack overflow detection with VMAP stack Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 09/17] powerpc/32: Use vmapped stacks for interrupts Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 10/17] powerpc/8xx: Use alternative scratch registers in DTLB miss handler Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 11/17] powerpc/8xx: drop exception entries for non-existing exceptions Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 12/17] powerpc/8xx: move DataStoreTLBMiss perf handler Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 13/17] powerpc/8xx: split breakpoint exception Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 14/17] powerpc/8xx: Enable CONFIG_VMAP_STACK Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 15/17] powerpc/32s: reorganise DSI handler Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 16/17] powerpc/32s: avoid crossing page boundary while changing SRR0/1 Christophe Leroy
2019-12-21 8:32 ` [PATCH v5 17/17] powerpc/32s: Enable CONFIG_VMAP_STACK Christophe Leroy
2020-01-18 12:46 ` Michael Ellerman
2020-02-06 20:31 ` Guenter Roeck [this message]
2020-02-07 6:13 ` Christophe Leroy
2020-02-07 8:28 ` Christophe Leroy
2020-02-07 13:08 ` Guenter Roeck
2020-02-07 13:29 ` Christophe Leroy
2020-02-07 13:44 ` Guenter Roeck
2020-02-07 17:16 ` Christophe Leroy
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