linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>,
	linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	Paul Mackerras <paulus@ozlabs.org>
Subject: Re: [PATCH v3 14/16] powerpc/32: implement fast entry for syscalls on BOOKE
Date: Mon, 3 Jun 2019 09:16:21 +0000	[thread overview]
Message-ID: <c4ff97c8-f601-0e62-9408-08bbef409636@c-s.fr> (raw)
In-Reply-To: <20190528190341.Horde.nTXOule-IO2ReXFiNIqNbg8@messagerie.si.c-s.fr>



On 05/28/2019 05:03 PM, Christophe Leroy wrote:
> Michael Ellerman <mpe@ellerman.id.au> a écrit :
> 
>> Christophe Leroy <christophe.leroy@c-s.fr> writes:
>>> Le 23/05/2019 à 09:00, Christophe Leroy a écrit :
>>>
>>> [...]
>>>
>>>>> arch/powerpc/kernel/head_fsl_booke.o: In function `SystemCall':
>>>>> arch/powerpc/kernel/head_fsl_booke.S:416: undefined reference to
>>>>> `kvmppc_handler_BOOKE_INTERRUPT_SYSCALL_SPRN_SRR1'
>>>>> Makefile:1052: recipe for target 'vmlinux' failed
>>>>>
>>>>>> +.macro SYSCALL_ENTRY trapno intno
>>>>>> +    mfspr    r10, SPRN_SPRG_THREAD
>>>>>> +#ifdef CONFIG_KVM_BOOKE_HV
>>>>>> +BEGIN_FTR_SECTION
>>>>>> +    mtspr    SPRN_SPRG_WSCRATCH0, r10
>>>>>> +    stw    r11, THREAD_NORMSAVE(0)(r10)
>>>>>> +    stw    r13, THREAD_NORMSAVE(2)(r10)
>>>>>> +    mfcr    r13            /* save CR in r13 for now       */
>>>>>> +    mfspr    r11, SPRN_SRR1
>>>>>> +    mtocrf    0x80, r11    /* check MSR[GS] without clobbering 
>>>>>> reg */
>>>>>> +    bf    3, 1975f
>>>>>> +    b    kvmppc_handler_BOOKE_INTERRUPT_\intno\()_SPRN_SRR1
>>>>>
>>>>> It seems to me that the "_SPRN_SRR1" on the end of this line
>>>>> isn't meant to be there...  However, it still fails to link with that
>>>>> removed.
>>>
>>> It looks like I missed the macro expansion.
>>>
>>> The called function should be kvmppc_handler_8_0x01B
>>>
>>> Seems like kisskb doesn't build any config like this.
>>
>> I thought we did, ie:
>>
>> http://kisskb.ellerman.id.au/kisskb/buildresult/13817941/
> 
> That's a ppc64 config it seems. The problem was on booke32.
> 
> Christophe
> 
>>
>> But clearly something is missing to trigger the bug.

I was able to trigger the bug with mpc85xx_defconfig + 
CONFIG_VIRTUALIZATION + CONFIG_PPC_E500MC

The bug pops up when CONFIG_KVM_BOOKE_HV is set.

Christophe

>>
>> cheers
> 
> 

  reply	other threads:[~2019-06-03  9:16 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-30 12:38 [PATCH v3 00/16] powerpc/32: Implement fast syscall entry Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 01/16] powerpc/32: Refactor EXCEPTION entry macros for head_8xx.S and head_32.S Christophe Leroy
2019-05-03  6:59   ` Michael Ellerman
2019-04-30 12:38 ` [PATCH v3 02/16] powerpc/32: move LOAD_MSR_KERNEL() into head_32.h and use it Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 03/16] powerpc/32: make the 6xx/8xx EXC_XFER_TEMPLATE() similar to the 40x/booke one Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 04/16] powerpc/40x: Don't use SPRN_SPRG_SCRATCH2 in EXCEPTION_PROLOG Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 05/16] powerpc/40x: add exception frame marker Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 06/16] powerpc/40x: Split and rename NORMAL_EXCEPTION_PROLOG Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 07/16] powerpc/40x: Refactor exception entry macros by using head_32.h Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 08/16] powerpc/fsl_booke: ensure SPEFloatingPointException() reenables interrupts Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 09/16] powerpc/32: enter syscall with MSR_EE inconditionaly set Christophe Leroy
2019-04-30 12:38 ` [PATCH v3 10/16] powerpc/32: Enter exceptions with MSR_EE unset Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 11/16] powerpc/32: get rid of COPY_EE in exception entry Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 12/16] powerpc: Fix 32-bit handling of MSR_EE on exceptions Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 13/16] powerpc/32: implement fast entry for syscalls on non BOOKE Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 14/16] powerpc/32: implement fast entry for syscalls on BOOKE Christophe Leroy
2019-05-23  6:14   ` Paul Mackerras
2019-05-23  7:00     ` Christophe Leroy
2019-05-23  8:10       ` Christophe Leroy
2019-05-28  5:37         ` Michael Ellerman
2019-05-28 17:03           ` Christophe Leroy
2019-06-03  9:16             ` Christophe Leroy [this message]
2019-06-04 16:59     ` Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 15/16] powerpc/32: don't do syscall stuff in transfer_to_handler Christophe Leroy
2019-04-30 12:39 ` [PATCH v3 16/16] powerpc/32: Don't add dummy frames when calling trace_hardirqs_on/off Christophe Leroy

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=c4ff97c8-f601-0e62-9408-08bbef409636@c-s.fr \
    --to=christophe.leroy@c-s.fr \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mpe@ellerman.id.au \
    --cc=npiggin@gmail.com \
    --cc=paulus@ozlabs.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).