From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH v2 1/3] ARM: catch pending imprecise abort on unmask Date: Thu, 15 Oct 2015 08:39:15 -0700 Message-ID: <20151015153915.GO10113@atomide.com> References: <1444905142-21500-1-git-send-email-l.stach@pengutronix.de> <1444905142-21500-2-git-send-email-l.stach@pengutronix.de> <20151015153246.GH32536@n2100.arm.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20151015153246.GH32536@n2100.arm.linux.org.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Russell King - ARM Linux Cc: Hauke Mehrtens , linux-omap@vger.kernel.org, patchwork-lst@pengutronix.de, linux-arm-kernel@lists.infradead.org, Lucas Stach List-Id: linux-omap@vger.kernel.org * Russell King - ARM Linux [151015 08:37]: > On Thu, Oct 15, 2015 at 12:32:20PM +0200, Lucas Stach wrote: > > Install a non-faulting handler just before unmasking imprecise aborts > > and switch back to the regular one after unmasking is done. > > > > This catches any pending imprecise abort that the firmware/bootloader > > may have left behind that would normally crash the kernel at that point. > > As there are apparently a lot of bootlaoders out there that do such a > > thing it makes sense to handle it in the common startup code. > > > > Signed-off-by: Lucas Stach > > Much better. Please feel free to add it to the patch system, thanks. > > I think, given that the original seems to be breaking platforms, this > patch needs to go into -rc kernels, right? Hmm do we still see a trace where the issue happened though with this one? What I though wes something pending from the bootloader, turned out to be a bogus SRAM init code that I was able to easily fix with the trace. Regards, Tony From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Thu, 15 Oct 2015 08:39:15 -0700 Subject: [PATCH v2 1/3] ARM: catch pending imprecise abort on unmask In-Reply-To: <20151015153246.GH32536@n2100.arm.linux.org.uk> References: <1444905142-21500-1-git-send-email-l.stach@pengutronix.de> <1444905142-21500-2-git-send-email-l.stach@pengutronix.de> <20151015153246.GH32536@n2100.arm.linux.org.uk> Message-ID: <20151015153915.GO10113@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Russell King - ARM Linux [151015 08:37]: > On Thu, Oct 15, 2015 at 12:32:20PM +0200, Lucas Stach wrote: > > Install a non-faulting handler just before unmasking imprecise aborts > > and switch back to the regular one after unmasking is done. > > > > This catches any pending imprecise abort that the firmware/bootloader > > may have left behind that would normally crash the kernel at that point. > > As there are apparently a lot of bootlaoders out there that do such a > > thing it makes sense to handle it in the common startup code. > > > > Signed-off-by: Lucas Stach > > Much better. Please feel free to add it to the patch system, thanks. > > I think, given that the original seems to be breaking platforms, this > patch needs to go into -rc kernels, right? Hmm do we still see a trace where the issue happened though with this one? What I though wes something pending from the bootloader, turned out to be a bogus SRAM init code that I was able to easily fix with the trace. Regards, Tony