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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A41FC43381 for ; Tue, 9 Mar 2021 12:10:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B95F265259 for ; Tue, 9 Mar 2021 12:10:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231152AbhCIMJp (ORCPT ); Tue, 9 Mar 2021 07:09:45 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:9186 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230122AbhCIMJc (ORCPT ); Tue, 9 Mar 2021 07:09:32 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4DvvC90QLGz9tyjH; Tue, 9 Mar 2021 13:09:25 +0100 (CET) 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 nn4CD7l4vK_b; Tue, 9 Mar 2021 13:09:24 +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 4DvvC86b9tz9tyjF; Tue, 9 Mar 2021 13:09:24 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 44CA78B7FC; Tue, 9 Mar 2021 13:09:26 +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 jt62WIiaF8Pb; Tue, 9 Mar 2021 13:09:26 +0100 (CET) Received: from po16121vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id CFE788B800; Tue, 9 Mar 2021 13:09:25 +0100 (CET) Received: by po16121vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 8FD0E67555; Tue, 9 Mar 2021 12:09:25 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [PATCH v2 00/43] powerpc/32: Switch to interrupt entry/exit in C To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , npiggin@gmail.com Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Tue, 9 Mar 2021 12:09:25 +0000 (UTC) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series aims at porting interrupt entry/exit in C on PPC32, using the work already merged for PPC64. First two patches are a fix and an optimisation of unrecoverable_exception() function. Six following patches do minimal changes in 40x in order to be able to enable MMU earlier in exception entry. Second part of the series prepares and switches interrupt exit in C. Third part moves more and more things in C, ending with KUAP management. v2 is tested on 8xx and 83xx and qemu, and compile tested via kisskb. Changes in v2: - Two first patches are new. - Mainly build fixes, nothing much new. Christophe Leroy (43): powerpc/traps: unrecoverable_exception() is not an interrupt handler powerpc/traps: Declare unrecoverable_exception() as __noreturn powerpc/40x: Don't use SPRN_SPRG_SCRATCH0/1 in TLB miss handlers powerpc/40x: Change CRITICAL_EXCEPTION_PROLOG macro to a gas macro powerpc/40x: Save SRR0/SRR1 and r10/r11 earlier in critical exception powerpc/40x: Reorder a few instructions in critical exception prolog powerpc/40x: Prepare for enabling MMU in critical exception prolog powerpc/40x: Prepare normal exception handler for enabling MMU early powerpc/32: Reconcile interrupts in C powerpc/32: Entry cpu time accounting in C powerpc/32: Handle bookE debugging in C in exception entry powerpc/32: Use fast instruction to set MSR RI in exception prolog on 8xx powerpc/32: Remove ksp_limit powerpc/32: Always enable data translation in exception prolog powerpc/32: Tag DAR in EXCEPTION_PROLOG_2 for the 8xx powerpc/32: Enable instruction translation at the same time as data translation powerpc/32: Statically initialise first emergency context powerpc/32: Add vmap_stack_overflow label inside the macro powerpc/32: Use START_EXCEPTION() as much as possible powerpc/32: Move exception prolog code into .text once MMU is back on powerpc/32: Provide a name to exception prolog continuation in virtual mode powerpc/32: Refactor booke critical registers saving powerpc/32: Perform normal function call in exception entry powerpc/32: Always save non volatile registers on exception entry powerpc/32: Replace ASM exception exit by C exception exit from ppc64 powerpc/32: Set regs parameter in r3 in transfer_to_handler powerpc/32: Call bad_page_fault() from do_page_fault() powerpc/64e: Call bad_page_fault() from do_page_fault() powerpc/32: Save trap number on stack in exception prolog powerpc/32: Add a prepare_transfer_to_handler macro for exception prologs powerpc/32: Only restore non volatile registers when required powerpc/32: Dismantle EXC_XFER_STD/LITE/TEMPLATE powerpc/32: Remove the xfer parameter in EXCEPTION() macro powerpc/32: Refactor saving of volatile registers in exception prologs powerpc/32: Save remaining registers in exception prolog powerpc/32: Set current->thread.regs in C interrupt entry powerpc/32: Return directly from power_save_ppc32_restore() powerpc/32: Only use prepare_transfer_to_handler function on book3s/32 and e500 powerpc/32s: Move KUEP locking/unlocking in C powerpc/64s: Make kuap_check_amr() and kuap_get_and_check_amr() generic powerpc/32s: Create C version of kuap save/restore/check helpers powerpc/8xx: Create C version of kuap save/restore/check helpers powerpc/32: Manage KUAP in C arch/powerpc/include/asm/book3s/32/kup.h | 126 +-- arch/powerpc/include/asm/book3s/64/kup.h | 24 +- arch/powerpc/include/asm/interrupt.h | 19 +- arch/powerpc/include/asm/kup.h | 27 +- arch/powerpc/include/asm/nohash/32/kup-8xx.h | 56 +- arch/powerpc/include/asm/ppc_asm.h | 10 - arch/powerpc/include/asm/processor.h | 6 +- arch/powerpc/include/asm/ptrace.h | 6 +- arch/powerpc/kernel/asm-offsets.c | 4 - arch/powerpc/kernel/entry_32.S | 835 ++++--------------- arch/powerpc/kernel/exceptions-64e.S | 8 +- arch/powerpc/kernel/fpu.S | 2 - arch/powerpc/kernel/head_32.h | 195 ++--- arch/powerpc/kernel/head_40x.S | 271 +++--- arch/powerpc/kernel/head_44x.S | 10 +- arch/powerpc/kernel/head_8xx.S | 151 ++-- arch/powerpc/kernel/head_book3s_32.S | 233 +++--- arch/powerpc/kernel/head_booke.h | 188 +++-- arch/powerpc/kernel/head_fsl_booke.S | 64 +- arch/powerpc/kernel/idle_6xx.S | 14 +- arch/powerpc/kernel/idle_e500.S | 14 +- arch/powerpc/kernel/interrupt.c | 40 +- arch/powerpc/kernel/irq.c | 2 +- arch/powerpc/kernel/misc_32.S | 14 - arch/powerpc/kernel/process.c | 6 +- arch/powerpc/kernel/setup_32.c | 2 +- arch/powerpc/kernel/traps.c | 15 +- arch/powerpc/kernel/vector.S | 2 - arch/powerpc/lib/sstep.c | 9 - arch/powerpc/mm/book3s32/Makefile | 1 + arch/powerpc/mm/book3s32/hash_low.S | 14 - arch/powerpc/mm/book3s32/kuep.c | 38 + arch/powerpc/mm/fault.c | 17 +- 33 files changed, 885 insertions(+), 1538 deletions(-) create mode 100644 arch/powerpc/mm/book3s32/kuep.c -- 2.25.0