From patchwork Sat Dec 21 08:32:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 11306851 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6624814E3 for ; Sat, 21 Dec 2019 08:32:26 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 23F4C21655 for ; Sat, 21 Dec 2019 08:32:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="X/CC3zVj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 23F4C21655 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CBEEA8E01DA; Sat, 21 Dec 2019 03:32:24 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id C21818E019D; Sat, 21 Dec 2019 03:32:24 -0500 (EST) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AC1EC8E01DA; Sat, 21 Dec 2019 03:32:24 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0154.hostedemail.com [216.40.44.154]) by kanga.kvack.org (Postfix) with ESMTP id 933D68E019D for ; Sat, 21 Dec 2019 03:32:24 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 42B568249980 for ; Sat, 21 Dec 2019 08:32:24 +0000 (UTC) X-FDA: 76288481808.30.rings95_14ea7cc1e3b56 X-Spam-Summary: 2,0,0,e8e10763891896c8,d41d8cd98f00b204,christophe.leroy@c-s.fr,:benh@kernel.crashing.org:paulus@samba.org:mpe@ellerman.id.au:dja@axtens.net:linux-kernel@vger.kernel.org:linuxppc-dev@lists.ozlabs.org:,RULES_HIT:41:69:355:379:969:973:981:988:989:1260:1261:1345:1437:1535:1542:1711:1730:1747:1777:1792:2393:2559:2562:2899:3138:3139:3140:3141:3142:3354:3865:3866:3867:3868:3870:3871:3872:4250:4605:5007:6117:6119:6261:6653:7875:7903:8634:8957:10004:11026:11232:11473:11658:11914:12043:12048:12291:12296:12297:12679:12683:12895:13161:13229:13972:14096:14181:14394:14721:14877:21080:21220:21451:21627:21740:30054,0,RBL:93.17.236.30:@c-s.fr:.lbl8.mailshell.net-62.2.5.100 64.100.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: rings95_14ea7cc1e3b56 X-Filterd-Recvd-Size: 5298 Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Sat, 21 Dec 2019 08:32:23 +0000 (UTC) Received: from localhost (mailhub1-ext [192.168.12.233]) by localhost (Postfix) with ESMTP id 47fzPd2RhCz9v1Kt; Sat, 21 Dec 2019 09:32:21 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=X/CC3zVj; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id 9CZTJWpIb3oz; Sat, 21 Dec 2019 09:32:21 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 47fzPd0n8yz9v1Ks; Sat, 21 Dec 2019 09:32:21 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1576917141; bh=E9RKebUP1SppGa2SP1hXCPrAmxC2lQWVebR4woXcBx4=; h=From:Subject:To:Cc:Date:From; b=X/CC3zVji3J7DK/g7Rrz/AyTo0Y5CoJMc25c7ql5rHqSRlTGaSqbTh4XA6EWt4SON g8dx7mQjw0IIqrUJTPNqMqOKZEn1YAyfja8qRjAHISFddOuN4hWvU9bO+610hzQw4x lGCJEXigJhDEI6ZgPMcq/MuxAcrBh5X+DBf1P/2c= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 02CFC8B77C; Sat, 21 Dec 2019 09:32:22 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id jxdAh1n2NAhk; Sat, 21 Dec 2019 09:32:21 +0100 (CET) Received: from localhost.localdomain (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id ACFFE8B752; Sat, 21 Dec 2019 09:32:21 +0100 (CET) Received: by localhost.localdomain (Postfix, from userid 0) id 4B883637B6; Sat, 21 Dec 2019 08:32:21 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [PATCH v5 00/17] Enable CONFIG_VMAP_STACK on PPC32 To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , dja@axtens.net Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Date: Sat, 21 Dec 2019 08:32:21 +0000 (UTC) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The purpose of this serie is to enable CONFIG_VMAP_STACK on PPC32. rfc v1: initial support on 8xx rfc v2: added stack overflow detection. v3: - Stack overflow detection works, tested with LKDTM STACK_EXHAUST test - Support for book3s32 added v4: - Fixed build failure with CONFIG_KVM (patch 14) - Fixed boot failure with pmac32_defconfig+VMAP_STACK+KVM (new patch 15) - Fixed crash with altivec and fpu (patch 16) v5: - Reduced ifdefs around tophys/tovirt by using macros (patch 5) - Reorganised stack overflow handling, making it independent of the existing one which could go away in another series (patch 7) - Added vmapped stacks for interrupts (new patch 8) Christophe Leroy (17): powerpc/32: replace MTMSRD() by mtmsr powerpc/32: Add EXCEPTION_PROLOG_0 in head_32.h powerpc/32: save DEAR/DAR before calling handle_page_fault powerpc/32: move MSR_PR test into EXCEPTION_PROLOG_0 powerpc/32: add a macro to get and/or save DAR and DSISR on stack. powerpc/32: prepare for CONFIG_VMAP_STACK powerpc: align stack to 2 * THREAD_SIZE with VMAP_STACK powerpc/32: Add early stack overflow detection with VMAP stack. powerpc/32: Use vmapped stacks for interrupts powerpc/8xx: Use alternative scratch registers in DTLB miss handler powerpc/8xx: drop exception entries for non-existing exceptions powerpc/8xx: move DataStoreTLBMiss perf handler powerpc/8xx: split breakpoint exception powerpc/8xx: Enable CONFIG_VMAP_STACK powerpc/32s: reorganise DSI handler. powerpc/32s: avoid crossing page boundary while changing SRR0/1. powerpc/32s: Enable CONFIG_VMAP_STACK arch/powerpc/include/asm/processor.h | 6 ++ arch/powerpc/include/asm/thread_info.h | 18 ++++ arch/powerpc/kernel/asm-offsets.c | 6 ++ arch/powerpc/kernel/entry_32.S | 29 +++--- arch/powerpc/kernel/fpu.S | 3 + arch/powerpc/kernel/head_32.S | 61 ++++++----- arch/powerpc/kernel/head_32.h | 178 +++++++++++++++++++++++++++---- arch/powerpc/kernel/head_40x.S | 2 + arch/powerpc/kernel/head_8xx.S | 184 +++++++++++++++------------------ arch/powerpc/kernel/head_booke.h | 2 + arch/powerpc/kernel/head_fsl_booke.S | 1 + arch/powerpc/kernel/irq.c | 22 ++++ arch/powerpc/kernel/setup.h | 2 +- arch/powerpc/kernel/setup_32.c | 17 ++- arch/powerpc/kernel/setup_64.c | 2 +- arch/powerpc/kernel/traps.c | 9 ++ arch/powerpc/kernel/vector.S | 3 + arch/powerpc/kernel/vmlinux.lds.S | 2 +- arch/powerpc/mm/book3s32/hash_low.S | 46 ++++++--- arch/powerpc/mm/book3s32/mmu.c | 9 +- arch/powerpc/perf/8xx-pmu.c | 12 ++- arch/powerpc/platforms/Kconfig.cputype | 3 + 22 files changed, 435 insertions(+), 182 deletions(-)