From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [PATCH v3 14/16] powerpc/32: implement fast entry for syscalls on BOOKE
Date: Thu, 23 May 2019 10:10:45 +0200 [thread overview]
Message-ID: <58f0e70f-ed9d-965e-e8d2-cc5d13a4c9eb@c-s.fr> (raw)
In-Reply-To: <98bf5745-88ae-7f17-fcb9-7d06ba5b9e49@c-s.fr>
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.
Christophe
>
> This SYSCALL_ENTRY macro is a slimmed version of NORMAL_EXCEPTION_PROLOG()
>
> In NORMAL_EXCEPTION_PROLOG(), we have:
> DO_KVM BOOKE_INTERRUPT_##intno SPRN_SRR1;
>
> The _SPRN_SRR1 comes from there
>
>
> Then in /arch/powerpc/include/asm/kvm_booke_hv_asm.h:
>
> .macro DO_KVM intno srr1
> #ifdef CONFIG_KVM_BOOKE_HV
> BEGIN_FTR_SECTION
> mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
> bf 3, 1975f
> b kvmppc_handler_\intno\()_\srr1
> 1975:
> END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
> #endif
> .endm
>
>
> Christophe
next prev parent reply other threads:[~2019-05-23 8:10 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 [this message]
2019-05-28 5:37 ` Michael Ellerman
2019-05-28 17:03 ` Christophe Leroy
2019-06-03 9:16 ` Christophe Leroy
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
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