* [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number [not found] <1440698215-8355-1-git-send-email-mathieu.desnoyers@efficios.com> @ 2015-08-27 17:56 ` Mathieu Desnoyers 2015-08-31 6:54 ` Michael Ellerman 0 siblings, 1 reply; 4+ messages in thread From: Mathieu Desnoyers @ 2015-08-27 17:56 UTC (permalink / raw) To: Andrew Morton, linux-api Cc: linux-kernel, Mathieu Desnoyers, Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman, linuxppc-dev Allow it to be used from SPU, since it should not have unwanted side-effects. [ Untested on this architecture. To try it out: fetch linux-next/akpm, apply this patch, build/run a membarrier-enabled kernel, and do make kselftest. ] Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: linux-api@vger.kernel.org CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Paul Mackerras <paulus@samba.org> CC: Michael Ellerman <mpe@ellerman.id.au> CC: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/include/asm/systbl.h | 1 + arch/powerpc/include/asm/unistd.h | 2 +- arch/powerpc/include/uapi/asm/unistd.h | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h index 4d65499..126d0c4 100644 --- a/arch/powerpc/include/asm/systbl.h +++ b/arch/powerpc/include/asm/systbl.h @@ -369,3 +369,4 @@ SYSCALL_SPU(bpf) COMPAT_SYS(execveat) PPC64ONLY(switch_endian) SYSCALL_SPU(userfaultfd) +SYSCALL_SPU(membarrier) diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index 4a055b6..13411be 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -12,7 +12,7 @@ #include <uapi/asm/unistd.h> -#define __NR_syscalls 365 +#define __NR_syscalls 366 #define __NR__exit __NR_exit #define NR_syscalls __NR_syscalls diff --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h index 6ad58d4..6337738 100644 --- a/arch/powerpc/include/uapi/asm/unistd.h +++ b/arch/powerpc/include/uapi/asm/unistd.h @@ -387,5 +387,6 @@ #define __NR_execveat 362 #define __NR_switch_endian 363 #define __NR_userfaultfd 364 +#define __NR_membarrier 365 #endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */ -- 1.9.1 ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number 2015-08-27 17:56 ` [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number Mathieu Desnoyers @ 2015-08-31 6:54 ` Michael Ellerman 2015-08-31 15:32 ` Mathieu Desnoyers 0 siblings, 1 reply; 4+ messages in thread From: Michael Ellerman @ 2015-08-31 6:54 UTC (permalink / raw) To: Mathieu Desnoyers Cc: Andrew Morton, linux-api, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev On Thu, 2015-08-27 at 13:56 -0400, Mathieu Desnoyers wrote: > Allow it to be used from SPU, since it should not have unwanted > side-effects. > > [ Untested on this architecture. To try it out: fetch linux-next/akpm, > apply this patch, build/run a membarrier-enabled kernel, and do make > kselftest. ] > > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> > CC: Andrew Morton <akpm@linux-foundation.org> > CC: linux-api@vger.kernel.org > CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> > CC: Paul Mackerras <paulus@samba.org> > CC: Michael Ellerman <mpe@ellerman.id.au> > CC: linuxppc-dev@lists.ozlabs.org Thanks. I get: $ ./membarrier_test membarrier MEMBARRIER_CMD_QUERY syscall available. membarrier: MEMBARRIER_CMD_SHARED success. membarrier: tests done! Which looks good. Assuming the membarrier support hits 4.3, I'll take this via my tree for 4.3 also. cheers ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number 2015-08-31 6:54 ` Michael Ellerman @ 2015-08-31 15:32 ` Mathieu Desnoyers 2015-09-01 1:00 ` Michael Ellerman 0 siblings, 1 reply; 4+ messages in thread From: Mathieu Desnoyers @ 2015-08-31 15:32 UTC (permalink / raw) To: Michael Ellerman Cc: Andrew Morton, linux-api, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev ----- On Aug 31, 2015, at 2:54 AM, Michael Ellerman mpe@ellerman.id.au wrote: > On Thu, 2015-08-27 at 13:56 -0400, Mathieu Desnoyers wrote: >> Allow it to be used from SPU, since it should not have unwanted >> side-effects. >> >> [ Untested on this architecture. To try it out: fetch linux-next/akpm, >> apply this patch, build/run a membarrier-enabled kernel, and do make >> kselftest. ] >> >> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> >> CC: Andrew Morton <akpm@linux-foundation.org> >> CC: linux-api@vger.kernel.org >> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> >> CC: Paul Mackerras <paulus@samba.org> >> CC: Michael Ellerman <mpe@ellerman.id.au> >> CC: linuxppc-dev@lists.ozlabs.org > > Thanks. > > I get: > > $ ./membarrier_test > membarrier MEMBARRIER_CMD_QUERY syscall available. > membarrier: MEMBARRIER_CMD_SHARED success. > membarrier: tests done! > > Which looks good. > > Assuming the membarrier support hits 4.3, I'll take this via my tree for 4.3 > also. Great! I'll take care of your comments about self-tests, Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number 2015-08-31 15:32 ` Mathieu Desnoyers @ 2015-09-01 1:00 ` Michael Ellerman 0 siblings, 0 replies; 4+ messages in thread From: Michael Ellerman @ 2015-09-01 1:00 UTC (permalink / raw) To: Mathieu Desnoyers Cc: Andrew Morton, linux-api, linux-kernel, Benjamin Herrenschmidt, Paul Mackerras, linuxppc-dev On Mon, 2015-08-31 at 15:32 +0000, Mathieu Desnoyers wrote: > ----- On Aug 31, 2015, at 2:54 AM, Michael Ellerman mpe@ellerman.id.au wrote: > > > On Thu, 2015-08-27 at 13:56 -0400, Mathieu Desnoyers wrote: > >> Allow it to be used from SPU, since it should not have unwanted > >> side-effects. > > $ ./membarrier_test > > membarrier MEMBARRIER_CMD_QUERY syscall available. > > membarrier: MEMBARRIER_CMD_SHARED success. > > membarrier: tests done! > > > > Which looks good. > > > > Assuming the membarrier support hits 4.3, I'll take this via my tree for 4.3 > > also. > > Great! I'll take care of your comments about self-tests, Thanks. None of them are critical so we can always fix them later. cheers ^ permalink raw reply [flat|nested] 4+ messages in thread
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2015-08-27 17:56 ` [RFC PATCH 1/9] powerpc: allocate sys_membarrier system call number Mathieu Desnoyers
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2015-09-01 1:00 ` Michael Ellerman
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