From: Arnd Bergmann <arnd@arndb.de> To: Linus Walleij <linus.walleij@linaro.org> Cc: "Russell King (Oracle)" <linux@armlinux.org.uk>, Catalin Marinas <catalin.marinas@arm.com>, Krzysztof Halasa <khalasa@piap.pl>, Neil Armstrong <narmstrong@baylibre.com>, Peter Zijlstra <peterz@infradead.org>, Andy Lutomirski <luto@kernel.org>, "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@kernel.org>, Dave Hansen <dave.hansen@intel.com>, LKML <linux-kernel@vger.kernel.org>, Linux Memory Management List <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>, Mathieu Desnoyers <mathieu.desnoyers@efficios.com>, Nicholas Piggin <npiggin@gmail.com>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Will Deacon <will@kernel.org>, Daniel Golle <daniel@makrotopia.org> Subject: Re: [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE Date: Fri, 18 Jun 2021 15:36:49 +0200 [thread overview] Message-ID: <CAK8P3a2P=AzY09OVvHQreLGKjQkN9Z=GM4OrO77zWhh7dF1bMw@mail.gmail.com> (raw) In-Reply-To: <CACRpkdYHoC66K7W6mUMqKfAJkcKeopBnAq8Rq+tLSdLo61jtAQ@mail.gmail.com> On Fri, Jun 18, 2021 at 2:54 PM Linus Walleij <linus.walleij@linaro.org> wrote: > On Wed, Jun 16, 2021 at 6:27 PM Russell King (Oracle) <linux@armlinux.org.uk> wrote: > > So it seems to come down to a question about CNS3xxx and OXNAS. If > > these aren't being used, maybe we can drop ARM11MPCore support and > > the associated platforms? > > > > Linus, Krzysztof, Neil, any input? > > I don't especially need to keep the ARM11MPCore machine alive, > it is just a testchip after all. The Oxnas is another story, that has wide > deployment and was contributed recently (2016) and has excellent > support in OpenWrt so I wouldn't really want to axe that. Agreed, as long as oxnas and/or cns3xxx are around, we should just keep the realview 11mpcore support, but if both of the commercial platforms are gone, then the realview can be retired as far as I'm concerned. Regarding oxnas, I see that OpenWRT has a number of essential device drivers (sata, pcie, usb and reset) that look like they could just be merged upstream, but that effort appears to have stalled: no device support was added to the dts files since the original 2016 merge. While the support in OpenWRT may be excellent, the platform support in the mainline kernel is limited to ethernet, nand, uart and gpio. Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de> To: Linus Walleij <linus.walleij@linaro.org> Cc: "Russell King (Oracle)" <linux@armlinux.org.uk>, Catalin Marinas <catalin.marinas@arm.com>, Krzysztof Halasa <khalasa@piap.pl>, Neil Armstrong <narmstrong@baylibre.com>, Peter Zijlstra <peterz@infradead.org>, Andy Lutomirski <luto@kernel.org>, "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@kernel.org>, Dave Hansen <dave.hansen@intel.com>, LKML <linux-kernel@vger.kernel.org>, Linux Memory Management List <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>, Mathieu Desnoyers <mathieu.desnoyers@efficios.com>, Nicholas Piggin <npiggin@gmail.com>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Will Deacon <will@kernel.org>, Daniel Golle <daniel@makrotopia.org> Subject: Re: [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE Date: Fri, 18 Jun 2021 15:36:49 +0200 [thread overview] Message-ID: <CAK8P3a2P=AzY09OVvHQreLGKjQkN9Z=GM4OrO77zWhh7dF1bMw@mail.gmail.com> (raw) In-Reply-To: <CACRpkdYHoC66K7W6mUMqKfAJkcKeopBnAq8Rq+tLSdLo61jtAQ@mail.gmail.com> On Fri, Jun 18, 2021 at 2:54 PM Linus Walleij <linus.walleij@linaro.org> wrote: > On Wed, Jun 16, 2021 at 6:27 PM Russell King (Oracle) <linux@armlinux.org.uk> wrote: > > So it seems to come down to a question about CNS3xxx and OXNAS. If > > these aren't being used, maybe we can drop ARM11MPCore support and > > the associated platforms? > > > > Linus, Krzysztof, Neil, any input? > > I don't especially need to keep the ARM11MPCore machine alive, > it is just a testchip after all. The Oxnas is another story, that has wide > deployment and was contributed recently (2016) and has excellent > support in OpenWrt so I wouldn't really want to axe that. Agreed, as long as oxnas and/or cns3xxx are around, we should just keep the realview 11mpcore support, but if both of the commercial platforms are gone, then the realview can be retired as far as I'm concerned. Regarding oxnas, I see that OpenWRT has a number of essential device drivers (sata, pcie, usb and reset) that look like they could just be merged upstream, but that effort appears to have stalled: no device support was added to the dts files since the original 2016 merge. While the support in OpenWRT may be excellent, the platform support in the mainline kernel is limited to ethernet, nand, uart and gpio. Arnd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-06-18 13:39 UTC|newest] Thread overview: 165+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-16 3:21 [PATCH 0/8] membarrier cleanups Andy Lutomirski 2021-06-16 3:21 ` [PATCH 1/8] membarrier: Document why membarrier() works Andy Lutomirski 2021-06-16 4:00 ` Nicholas Piggin 2021-06-16 7:30 ` Peter Zijlstra 2021-06-17 23:45 ` Andy Lutomirski 2021-06-16 3:21 ` [PATCH 2/8] x86/mm: Handle unlazying membarrier core sync in the arch code Andy Lutomirski 2021-06-16 4:25 ` Nicholas Piggin 2021-06-16 18:31 ` Andy Lutomirski 2021-06-16 17:49 ` Mathieu Desnoyers 2021-06-16 17:49 ` Mathieu Desnoyers 2021-06-16 18:31 ` Andy Lutomirski 2021-06-16 3:21 ` [PATCH 3/8] membarrier: Remove membarrier_arch_switch_mm() prototype in core code Andy Lutomirski 2021-06-16 4:26 ` Nicholas Piggin 2021-06-16 17:52 ` Mathieu Desnoyers 2021-06-16 17:52 ` Mathieu Desnoyers 2021-06-16 3:21 ` [PATCH 4/8] membarrier: Make the post-switch-mm barrier explicit Andy Lutomirski 2021-06-16 4:19 ` Nicholas Piggin 2021-06-16 7:35 ` Peter Zijlstra 2021-06-16 18:41 ` Andy Lutomirski 2021-06-17 1:37 ` Nicholas Piggin 2021-06-17 2:57 ` Andy Lutomirski 2021-06-17 5:32 ` Andy Lutomirski 2021-06-17 6:51 ` Nicholas Piggin 2021-06-17 23:49 ` Andy Lutomirski 2021-06-19 2:53 ` Nicholas Piggin 2021-06-19 3:20 ` Andy Lutomirski 2021-06-19 4:27 ` Nicholas Piggin 2021-06-17 9:08 ` [RFC][PATCH] sched: Use lightweight hazard pointers to grab lazy mms Peter Zijlstra 2021-06-17 9:10 ` Peter Zijlstra 2021-06-17 10:00 ` Nicholas Piggin 2021-06-17 9:13 ` Peter Zijlstra 2021-06-17 14:06 ` Andy Lutomirski 2021-06-17 9:28 ` Peter Zijlstra 2021-06-17 14:03 ` Andy Lutomirski 2021-06-17 14:10 ` Andy Lutomirski 2021-06-17 15:45 ` Peter Zijlstra 2021-06-18 3:29 ` Paul E. McKenney 2021-06-18 5:04 ` Andy Lutomirski 2021-06-17 15:02 ` [PATCH 4/8] membarrier: Make the post-switch-mm barrier explicit Paul E. McKenney 2021-06-18 0:06 ` Andy Lutomirski 2021-06-18 3:35 ` Paul E. McKenney 2021-06-17 8:45 ` Peter Zijlstra 2021-06-16 3:21 ` [PATCH 5/8] membarrier, kthread: Use _ONCE accessors for task->mm Andy Lutomirski 2021-06-16 4:28 ` Nicholas Piggin 2021-06-16 18:08 ` Mathieu Desnoyers 2021-06-16 18:08 ` Mathieu Desnoyers 2021-06-16 18:45 ` Andy Lutomirski 2021-06-16 3:21 ` [PATCH 6/8] powerpc/membarrier: Remove special barrier on mm switch Andy Lutomirski 2021-06-16 3:21 ` Andy Lutomirski 2021-06-16 4:36 ` Nicholas Piggin 2021-06-16 4:36 ` Nicholas Piggin 2021-06-16 3:21 ` [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE Andy Lutomirski 2021-06-16 3:21 ` Andy Lutomirski 2021-06-16 9:28 ` Russell King (Oracle) 2021-06-16 9:28 ` Russell King (Oracle) 2021-06-16 10:16 ` Peter Zijlstra 2021-06-16 10:16 ` Peter Zijlstra 2021-06-16 10:20 ` Peter Zijlstra 2021-06-16 10:20 ` Peter Zijlstra 2021-06-16 10:34 ` Russell King (Oracle) 2021-06-16 10:34 ` Russell King (Oracle) 2021-06-16 11:10 ` Peter Zijlstra 2021-06-16 11:10 ` Peter Zijlstra 2021-06-16 13:22 ` Russell King (Oracle) 2021-06-16 13:22 ` Russell King (Oracle) 2021-06-16 15:04 ` Catalin Marinas 2021-06-16 15:04 ` Catalin Marinas 2021-06-16 15:23 ` Russell King (Oracle) 2021-06-16 15:23 ` Russell King (Oracle) 2021-06-16 15:45 ` Catalin Marinas 2021-06-16 15:45 ` Catalin Marinas 2021-06-16 16:00 ` Catalin Marinas 2021-06-16 16:00 ` Catalin Marinas 2021-06-16 16:27 ` Russell King (Oracle) 2021-06-16 16:27 ` Russell King (Oracle) 2021-06-17 8:55 ` Krzysztof Hałasa 2021-06-17 8:55 ` Krzysztof Hałasa 2021-06-17 8:55 ` Krzysztof Hałasa 2021-06-18 12:54 ` Linus Walleij 2021-06-18 12:54 ` Linus Walleij 2021-06-18 12:54 ` Linus Walleij 2021-06-18 13:19 ` Russell King (Oracle) 2021-06-18 13:19 ` Russell King (Oracle) 2021-06-18 13:36 ` Arnd Bergmann [this message] 2021-06-18 13:36 ` Arnd Bergmann 2021-06-18 13:36 ` Arnd Bergmann 2021-06-17 10:40 ` Mark Rutland 2021-06-17 10:40 ` Mark Rutland 2021-06-17 11:23 ` Russell King (Oracle) 2021-06-17 11:23 ` Russell King (Oracle) 2021-06-17 11:33 ` Mark Rutland 2021-06-17 11:33 ` Mark Rutland 2021-06-17 13:41 ` Andy Lutomirski 2021-06-17 13:41 ` Andy Lutomirski 2021-06-17 13:51 ` Mark Rutland 2021-06-17 13:51 ` Mark Rutland 2021-06-17 14:00 ` Andy Lutomirski 2021-06-17 14:00 ` Andy Lutomirski 2021-06-17 14:20 ` Mark Rutland 2021-06-17 14:20 ` Mark Rutland 2021-06-17 15:01 ` Peter Zijlstra 2021-06-17 15:01 ` Peter Zijlstra 2021-06-17 15:13 ` Peter Zijlstra 2021-06-17 15:13 ` Peter Zijlstra 2021-06-17 14:16 ` Mathieu Desnoyers 2021-06-17 14:16 ` Mathieu Desnoyers 2021-06-17 14:05 ` Peter Zijlstra 2021-06-17 14:05 ` Peter Zijlstra 2021-06-18 0:07 ` Andy Lutomirski 2021-06-18 0:07 ` Andy Lutomirski 2021-06-16 3:21 ` [PATCH 8/8] membarrier: Rewrite sync_core_before_usermode() and improve documentation Andy Lutomirski 2021-06-16 3:21 ` Andy Lutomirski 2021-06-16 3:21 ` Andy Lutomirski 2021-06-16 4:45 ` Nicholas Piggin 2021-06-16 4:45 ` Nicholas Piggin 2021-06-16 4:45 ` Nicholas Piggin 2021-06-16 18:52 ` Andy Lutomirski 2021-06-16 18:52 ` Andy Lutomirski 2021-06-16 18:52 ` Andy Lutomirski 2021-06-16 23:48 ` Andy Lutomirski 2021-06-16 23:48 ` Andy Lutomirski 2021-06-16 23:48 ` Andy Lutomirski 2021-06-18 15:27 ` Christophe Leroy 2021-06-18 15:27 ` Christophe Leroy 2021-06-18 15:27 ` Christophe Leroy 2021-06-16 10:20 ` Will Deacon 2021-06-16 10:20 ` Will Deacon 2021-06-16 10:20 ` Will Deacon 2021-06-16 23:58 ` Andy Lutomirski 2021-06-16 23:58 ` Andy Lutomirski 2021-06-16 23:58 ` Andy Lutomirski 2021-06-17 14:47 ` Mathieu Desnoyers 2021-06-17 14:47 ` Mathieu Desnoyers 2021-06-17 14:47 ` Mathieu Desnoyers 2021-06-17 14:47 ` Mathieu Desnoyers 2021-06-18 0:12 ` Andy Lutomirski 2021-06-18 0:12 ` Andy Lutomirski 2021-06-18 0:12 ` Andy Lutomirski 2021-06-18 16:31 ` Mathieu Desnoyers 2021-06-18 16:31 ` Mathieu Desnoyers 2021-06-18 16:31 ` Mathieu Desnoyers 2021-06-18 16:31 ` Mathieu Desnoyers 2021-06-18 19:58 ` Andy Lutomirski 2021-06-18 19:58 ` Andy Lutomirski 2021-06-18 19:58 ` Andy Lutomirski 2021-06-18 20:09 ` Mathieu Desnoyers 2021-06-18 20:09 ` Mathieu Desnoyers 2021-06-18 20:09 ` Mathieu Desnoyers 2021-06-18 20:09 ` Mathieu Desnoyers 2021-06-19 6:02 ` Nicholas Piggin 2021-06-19 6:02 ` Nicholas Piggin 2021-06-19 6:02 ` Nicholas Piggin 2021-06-19 15:50 ` Andy Lutomirski 2021-06-19 15:50 ` Andy Lutomirski 2021-06-19 15:50 ` Andy Lutomirski 2021-06-20 2:10 ` Nicholas Piggin 2021-06-20 2:10 ` Nicholas Piggin 2021-06-20 2:10 ` Nicholas Piggin 2021-06-17 15:16 ` Mathieu Desnoyers 2021-06-17 15:16 ` Mathieu Desnoyers 2021-06-17 15:16 ` Mathieu Desnoyers 2021-06-17 15:16 ` Mathieu Desnoyers 2021-06-18 0:13 ` Andy Lutomirski 2021-06-18 0:13 ` Andy Lutomirski 2021-06-18 0:13 ` Andy Lutomirski
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