From patchwork Mon May 1 12:38:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 13227588 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 01E68C77B73 for ; Mon, 1 May 2023 15:16:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2WZdrX8RYmKsaXo8VJ5Wrxh10ANldC7phqkpjcmCZug=; b=yPlog+kT+9yHkY me5EneBGfKyRMaM/Mz5Y/v2XcHvJvk+lwBfhNTMg/SlDE6aAdSBJwJKz0EAigMtVeoQuDO/EnWVBS Zo6PnxLupPOWuNRwWUj6FYB5Q5TXWhJntwSPmn90GrilGhAmeTl2Nv46Uh6l1zA5i3l3V/zNf4tbf 2banEDWFywj4sIgeZlx2zqHs+qCm/z3KGjtOSNwOjqOfmc2QhIEtV7oMpU78sLfuNBO6MTYouiBpu k4l8IMekCEW/OFXNobchDgB2svxXwojLArmnMyiiil6lwJah3YmbmAK7rDezGal4OeC2TiOZjdhbG WvS0fDBU9fxta8LXr4WA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1ptSo8-00Fzub-2H; Mon, 01 May 2023 12:39:08 +0000 Received: from mail-ed1-x52c.google.com ([2a00:1450:4864:20::52c]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1ptSo4-00Fznm-0J for linux-riscv@lists.infradead.org; Mon, 01 May 2023 12:39:06 +0000 Received: by mail-ed1-x52c.google.com with SMTP id 4fb4d7f45d1cf-50bc070c557so3012556a12.0 for ; Mon, 01 May 2023 05:39:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1682944740; x=1685536740; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=ecmOgKj4rHuYIab/sfV0jN5x+nFDKq6SG67BJPIt7F0=; b=mKg+bkq0NR+B9AinP7+ox3WRRdl5CMkW6hn7AD82Fgqa+7fbUMNiNltYuZCdWKFzGc unhr5yMOsZL/or9r8PjKGOGnbVzP8zPkt+LRSVK8mg5G/t33oA9o1PY698FnKY8PYIET /LDgi+GpCXZLnhOflN7j/omuXZmCcamYmO4lk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682944740; x=1685536740; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ecmOgKj4rHuYIab/sfV0jN5x+nFDKq6SG67BJPIt7F0=; b=janRIcYRJsVGE1/roJ/qnsxmBQZU2t2dfuu89vzfbmZOyDLMyXCl6W4B4XzBd1i172 CummuEfEVyL1CV5Rp7u2s9tRg0dLzRujh94pxUpCCTxJcz99i1AwPr8CDzDSpzkmwuCr s0i8l/PjtzB88ZZ+qyq1FOptv1pauuZAvX7nAisi0a5B0Ln41cLOHI3Q9AJs7mIZ1Tm7 l5YqT0oCF5p7idZ2kd0mK10dcmWM7lk5d1opo+z3NL93qctfUpjP9wnaIgtTshHwh5In ylutiFHj+G4jTM0VOT2nrZndNUE5kR3/a5fl1osqKsXpxN1hGUl8IKEFYMvqTU6CHNBY 9LAg== X-Gm-Message-State: AC+VfDwrHzen9ZrkT17tqed8MLQq63qqFmN0IfzQHD0p2fD810zn6Krx Rg7faylp8/MZfCVkrhY0u0R7lg== X-Google-Smtp-Source: ACHHUZ61A+LRi+71XC3zKgGuQNso9mPlM0T8FY/poP6QaGXzZI8sTUhNY6Hk0v49L4lTBvUZBRM9uA== X-Received: by 2002:aa7:dc0f:0:b0:506:c2b2:72fc with SMTP id b15-20020aa7dc0f000000b00506c2b272fcmr4483898edu.7.1682944740515; Mon, 01 May 2023 05:39:00 -0700 (PDT) Received: from alco.roam.corp.google.com ([2620:0:1059:10:c573:159e:712e:688b]) by smtp.gmail.com with ESMTPSA id c8-20020aa7c988000000b0050bcbb5708asm146772edt.35.2023.05.01.05.38.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 May 2023 05:39:00 -0700 (PDT) From: Ricardo Ribalda Date: Mon, 01 May 2023 14:38:21 +0200 Subject: [PATCH v6 3/4] powerpc/purgatory: Remove profile optimization flags MIME-Version: 1.0 Message-Id: <20230321-kexec_clang16-v6-3-a2255e81ab45@chromium.org> References: <20230321-kexec_clang16-v6-0-a2255e81ab45@chromium.org> In-Reply-To: <20230321-kexec_clang16-v6-0-a2255e81ab45@chromium.org> To: Eric Biederman , Philipp Rudo , Dave Young , Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Nathan Chancellor , Tom Rix , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: Baoquan He , Philipp Rudo , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Ross Zwisler , Steven Rostedt , Simon Horman , Nick Desaulniers , llvm@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, Ricardo Ribalda , stable@vger.kernel.org X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1087; i=ribalda@chromium.org; h=from:subject:message-id; bh=5RExnAah9i9M9ThRE28+66klWLL9LdvzLPE8nTUxjoc=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBkT7La8ioS0FTBvHSBrwIzNc4yErEKxBXHSQt+x JiCAoPrehyJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCZE+y2gAKCRDRN9E+zzrE iPSPD/9e9vGoy1sdkIvKVHZQw4XGt6HvaPue9LcoY39HNyZE8mZATbQBYoSI3SkVObACWx/jlGW hny9wRcxVSR2gX6ndlP3hfzmhcAG5m4snPNfr1/kVb1t204udn4JAMSu6uB0tOAaEJf0cly/tPX MgzKHTBxQ934jsr55N3AFr9IVNmsahHF4f3aSWjNkqG17UbtDgv8cTwplGTAcFmuEaR2z1RjZkA F/yFwnqe+z3MZ88H8P+DkXvYeZmVqaAlsGnmPR7qa/hdj36aRty/zFgPnKfHUSJeGyp2fH2NnXz Cd1SzviJIuk0zXGetJ0TVMwvd06uiL48vL15JIziDBIUBrXgwgsjgWjbJX9UyVQgnQxw2mlzHtT Z7CLSbHlZeWWNhhMRi8OdxxXy970/+OBiTXjIC3RdYBoC1cs9ICI2TwUw+oOGh+NTL0sqsgyWmN qXAI32vfKKHiJSW146dpoerqe2/aEC2FUfzHHni/4c6Xc897c8ScvQ1KbXuolWzL1VEjHrXofQx UTbe/svZ2wrRRbzYDaPi17SrFGFPMeTLs/8NtUxrR/huyW2SHpZatS4Q5VxStlZ8eC+qZ/c8S1X VmC7nztI9HXeDK9dTlsMYGuPnA7hQ52n2CrQPyQ+zyQMCydIlCzoTIuFwmucPvw8iUBDg/Qb8sn WvYecPgPSx57Nlw== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230501_053904_138735_439D6A4F X-CRM114-Status: GOOD ( 10.19 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org If PGO is enabled, the purgatory ends up with multiple .text sections. This is not supported by kexec and crashes the system. Cc: stable@vger.kernel.org Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory") Signed-off-by: Ricardo Ribalda --- arch/powerpc/purgatory/Makefile | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/powerpc/purgatory/Makefile b/arch/powerpc/purgatory/Makefile index 6f5e2727963c..5efb164330b2 100644 --- a/arch/powerpc/purgatory/Makefile +++ b/arch/powerpc/purgatory/Makefile @@ -5,6 +5,11 @@ KCSAN_SANITIZE := n targets += trampoline_$(BITS).o purgatory.ro +# When profile optimization is enabled, llvm emits two different overlapping +# text sections, which is not supported by kexec. Remove profile optimization +# flags. +KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS)) + LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined $(obj)/purgatory.ro: $(obj)/trampoline_$(BITS).o FORCE