From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-api@vger.kernel.org, musl@lists.openwall.com,
libc-dev@lists.llvm.org, linuxppc-dev@lists.ozlabs.org,
Nicholas Piggin <npiggin@gmail.com>
Subject: [musl] Re: [PATCH 2/2] powerpc/64s: system call support for scv/rfscv instructions
Date: Thu, 23 Jul 2020 18:48:14 +0200 [thread overview]
Message-ID: <20200723184814.Horde.pk5BO9iFqyGX5D4TW5wqmg1@messagerie.si.c-s.fr> (raw)
In-Reply-To: <871rl2ralk.fsf@mpe.ellerman.id.au>
Michael Ellerman <mpe@ellerman.id.au> a écrit :
> Nicholas Piggin <npiggin@gmail.com> writes:
>> diff --git a/arch/powerpc/include/asm/ppc-opcode.h
>> b/arch/powerpc/include/asm/ppc-opcode.h
>> index 2a39c716c343..b2bdc4de1292 100644
>> --- a/arch/powerpc/include/asm/ppc-opcode.h
>> +++ b/arch/powerpc/include/asm/ppc-opcode.h
>> @@ -257,6 +257,7 @@
>> #define PPC_INST_MFVSRD 0x7c000066
>> #define PPC_INST_MTVSRD 0x7c000166
>> #define PPC_INST_SC 0x44000002
>> +#define PPC_INST_SCV 0x44000001
> ...
>> @@ -411,6 +412,7 @@
> ...
>> +#define __PPC_LEV(l) (((l) & 0x7f) << 5)
>
> These conflicted and didn't seem to be used so I dropped them.
>
>> diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
>> index 5abe98216dc2..161bfccbc309 100644
>> --- a/arch/powerpc/lib/sstep.c
>> +++ b/arch/powerpc/lib/sstep.c
>> @@ -3378,6 +3382,16 @@ int emulate_step(struct pt_regs *regs,
>> struct ppc_inst instr)
>> regs->msr = MSR_KERNEL;
>> return 1;
>>
>> + case SYSCALL_VECTORED_0: /* scv 0 */
>> + regs->gpr[9] = regs->gpr[13];
>> + regs->gpr[10] = MSR_KERNEL;
>> + regs->gpr[11] = regs->nip + 4;
>> + regs->gpr[12] = regs->msr & MSR_MASK;
>> + regs->gpr[13] = (unsigned long) get_paca();
>> + regs->nip = (unsigned long) &system_call_vectored_emulate;
>> + regs->msr = MSR_KERNEL;
>> + return 1;
>> +
>
> This broke the ppc64e build:
>
> ld: arch/powerpc/lib/sstep.o:(.toc+0x0): undefined reference to
> `system_call_vectored_emulate'
> make[1]: *** [/home/michael/linux/Makefile:1139: vmlinux] Error 1
>
> I wrapped it in #ifdef CONFIG_PPC64_BOOK3S.
You mean CONFIG_PPC_BOOK3S_64 ?
Christophe
>
> cheers
next prev parent reply other threads:[~2020-07-23 16:47 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-11 8:12 [musl] Linux powerpc new system call instruction and ABI Nicholas Piggin
2020-06-11 8:12 ` [musl] [PATCH 1/2] powerpc/64s/exception: treat NIA below __end_interrupts as soft-masked Nicholas Piggin
2020-07-24 13:25 ` [musl] " Michael Ellerman
2020-06-11 8:12 ` [musl] [PATCH 2/2] powerpc/64s: system call support for scv/rfscv instructions Nicholas Piggin
2020-07-23 6:47 ` [musl] " Michael Ellerman
2020-07-23 16:48 ` Christophe Leroy [this message]
2020-07-24 10:45 ` Michael Ellerman
2020-06-11 21:02 ` [musl] Re: Linux powerpc new system call instruction and ABI Segher Boessenkool
2020-06-14 9:26 ` Nicholas Piggin
2021-05-18 23:13 ` Dmitry V. Levin
2021-05-19 2:50 ` Nicholas Piggin
2021-05-19 5:01 ` Nicholas Piggin
2021-05-21 19:40 ` Matheus Castanho
2021-05-21 19:52 ` Florian Weimer
2021-05-21 20:00 ` Matheus Castanho
2021-05-21 20:52 ` Dmitry V. Levin
2021-05-24 12:11 ` Matheus Castanho
2021-05-24 20:33 ` Matheus Castanho
2021-05-19 10:24 ` Dmitry V. Levin
2021-05-19 10:59 ` Nicholas Piggin
2021-05-19 12:39 ` Tulio Magno Quites Machado Filho
2021-05-19 13:26 ` Dmitry V. Levin
2021-05-19 22:51 ` Nicholas Piggin
2021-05-19 23:27 ` Dmitry V. Levin
2021-05-20 2:40 ` Nicholas Piggin
2021-05-20 3:06 ` Dmitry V. Levin
2021-05-20 5:12 ` Nicholas Piggin
2021-05-19 7:33 ` Joakim Tjernlund
2021-05-19 7:55 ` Nicholas Piggin
2021-05-19 8:08 ` Joakim Tjernlund
2021-05-19 8:42 ` Nicholas Piggin
2021-05-19 11:12 ` Nicholas Piggin
2021-05-19 14:38 ` Segher Boessenkool
2021-05-19 15:06 ` Joakim Tjernlund
2021-05-19 15:22 ` Segher Boessenkool
2021-05-19 15:36 ` Rich Felker
2021-05-19 18:09 ` Joakim Tjernlund
2021-05-19 23:48 ` Rich Felker
2021-05-20 1:06 ` Dmitry V. Levin
2021-05-20 2:45 ` Nicholas Piggin
2021-05-20 2:59 ` Dmitry V. Levin
2021-05-20 7:20 ` Nicholas Piggin
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