From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD003C433FE for ; Thu, 29 Sep 2022 11:09:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235007AbiI2LJo (ORCPT ); Thu, 29 Sep 2022 07:09:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234420AbiI2LJn (ORCPT ); Thu, 29 Sep 2022 07:09:43 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 47CDB111C for ; Thu, 29 Sep 2022 04:09:38 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B8CF615BF; Thu, 29 Sep 2022 04:09:44 -0700 (PDT) Received: from FVFF77S0Q05N (unknown [10.57.81.100]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9E60D3F73B; Thu, 29 Sep 2022 04:09:36 -0700 (PDT) Date: Thu, 29 Sep 2022 12:09:33 +0100 From: Mark Rutland To: Jon Hunter Cc: linux-arm-kernel@lists.infradead.org, ardb@kernel.org, catalin.marinas@arm.com, james.morse@arm.com, joey.gouly@arm.com, maz@kernel.org, will@kernel.org, "linux-tegra@vger.kernel.org" Subject: Re: [PATCH v2 6/8] arm64: alternatives: have callbacks take a cap Message-ID: References: <20220912162210.3626215-1-mark.rutland@arm.com> <20220912162210.3626215-7-mark.rutland@arm.com> <3cecc3a5-30b0-f0bd-c3de-9e09bd21909b@nvidia.com> <9317eb32-4dc3-c865-a1ac-320a14ebea56@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <9317eb32-4dc3-c865-a1ac-320a14ebea56@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org On Thu, Sep 29, 2022 at 12:01:24PM +0100, Jon Hunter wrote: > > On 29/09/2022 11:47, Mark Rutland wrote: > > On Thu, Sep 29, 2022 at 10:53:56AM +0100, Jon Hunter wrote: > > > > > > On 27/09/2022 10:31, Jon Hunter wrote: > > > > > > ... > > > > > > > > diff --git a/arch/arm64/include/asm/alternative-macros.h > > > > > b/arch/arm64/include/asm/alternative-macros.h > > > > > index 7e157ab6cd505..189c31be163ce 100644 > > > > > --- a/arch/arm64/include/asm/alternative-macros.h > > > > > +++ b/arch/arm64/include/asm/alternative-macros.h > > > > > @@ -2,10 +2,16 @@ > > > > >   #ifndef __ASM_ALTERNATIVE_MACROS_H > > > > >   #define __ASM_ALTERNATIVE_MACROS_H > > > > > +#include > > > > > + > > > > >   #include > > > > >   #include > > > > > -#define ARM64_CB_PATCH ARM64_NCAPS > > > > > +#define ARM64_CB_BIT    (UL(1) << 15) > > > > > + > > > > > +#if ARM64_NCAPS >= ARM64_CB_BIT > > > > > +#error "cpucaps have overflown ARM64_CB_BIT" > > > > > +#endif > > > > > > > > > > > > Some of our builders are failing and bisect is pointing to this commit. > > > > Looks like they don't like the above and I see the following errors ... > > > > > > > >   CC      arch/arm64/kvm/hyp/vhe/debug-sr.o > > > > /tmp/ccY3kbki.s: Assembler messages: > > > > /tmp/ccY3kbki.s:1600: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1600: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1600: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1600: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1600: Error: junk at end of line, first unrecognized > > > > character is `L' > > > > /tmp/ccY3kbki.s:1723: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1723: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1723: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1723: Error: found 'L', expected: ')' > > > > /tmp/ccY3kbki.s:1723: Error: junk at end of line, first unrecognized > > > > character is `L' > > > > scripts/Makefile.build:249: recipe for target > > > > 'arch/arm64/kvm/hyp/vhe/debug-sr.o' failed > > > > > > > > Seems that it does not like the 'UL' macro for some reason. Any thoughts? > > > > > > > > > FYI, this issue is seen with GCC6 but GCC7 and beyond appear to work fine. > > > > Hmm... IIRC there was an issue with some older binutils here not liking the UL > > suffix, but I thought we'd moved beyond those versions now; can you tell me > > exactly which binutils version you're using? > > > > I currently can't run the kernel.org crosstool GCC 5.5.0 release on my machine > > since something's going wrong looking for an older version of libisl.so than my > > system provides; I'll see if I can get that going and test locally. > > > > I suspect we can bodge around this with something like the diff below. > > > > Thanks, > > Mark. > > > > ---->8---- > > diff --git a/arch/arm64/include/asm/alternative-macros.h b/arch/arm64/include/asm/alternative-macros.h > > index 966767debaa3..4dd23bdbfb9e 100644 > > --- a/arch/arm64/include/asm/alternative-macros.h > > +++ b/arch/arm64/include/asm/alternative-macros.h > > @@ -2,12 +2,14 @@ > > #ifndef __ASM_ALTERNATIVE_MACROS_H > > #define __ASM_ALTERNATIVE_MACROS_H > > +#include > > #include > > #include > > #include > > -#define ARM64_CB_BIT (UL(1) << 15) > > +#define ARM64_CB_SHIFT 15 > > +#define ARM64_CB_BIT BIT(ARM64_CB_SHIFT) > > #if ARM64_NCAPS >= ARM64_CB_BIT > > #error "cpucaps have overflown ARM64_CB_BIT" > > @@ -80,7 +82,7 @@ > > __ALTERNATIVE_CFG(oldinstr, newinstr, feature, IS_ENABLED(cfg)) > > #define ALTERNATIVE_CB(oldinstr, feature, cb) \ > > - __ALTERNATIVE_CFG_CB(oldinstr, ARM64_CB_BIT | (feature), 1, cb) > > + __ALTERNATIVE_CFG_CB(oldinstr, (1 << ARM64_CB_SHIFT) | (feature), 1, cb) > > #else > > #include > > @@ -150,7 +152,7 @@ > > .macro alternative_cb cap, cb > > .set .Lasm_alt_mode, 0 > > .pushsection .altinstructions, "a" > > - altinstruction_entry 661f, \cb, ARM64_CB_BIT | \cap, 662f-661f, 0 > > + altinstruction_entry 661f, \cb, (1 << ARM64_CB_SHIFT) | \cap, 662f-661f, 0 > > .popsection > > 661: > > .endm > > > Yes that fixes it. > > Tested-by: Jon Hunter Great! Could you please let me know which version of binutils, so that we can add something regarding that in a comment and in the commit message? The output of ${CROSS_COMPILE}as --version would suffice. With that, I can clean this up and send as a proper patch. Thanks, Mark. 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(Postfix) with ESMTPSA id 9E60D3F73B; Thu, 29 Sep 2022 04:09:36 -0700 (PDT) Date: Thu, 29 Sep 2022 12:09:33 +0100 From: Mark Rutland To: Jon Hunter Cc: linux-arm-kernel@lists.infradead.org, ardb@kernel.org, catalin.marinas@arm.com, james.morse@arm.com, joey.gouly@arm.com, maz@kernel.org, will@kernel.org, "linux-tegra@vger.kernel.org" Subject: Re: [PATCH v2 6/8] arm64: alternatives: have callbacks take a cap Message-ID: References: <20220912162210.3626215-1-mark.rutland@arm.com> <20220912162210.3626215-7-mark.rutland@arm.com> <3cecc3a5-30b0-f0bd-c3de-9e09bd21909b@nvidia.com> <9317eb32-4dc3-c865-a1ac-320a14ebea56@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <9317eb32-4dc3-c865-a1ac-320a14ebea56@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220929_040939_922102_E80FF5AC X-CRM114-Status: GOOD ( 29.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list 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