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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 EF04CC04AB5 for ; Thu, 6 Jun 2019 09:32:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CC64520684 for ; Thu, 6 Jun 2019 09:32:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727875AbfFFJcF (ORCPT ); Thu, 6 Jun 2019 05:32:05 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:43578 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727509AbfFFJcE (ORCPT ); Thu, 6 Jun 2019 05:32:04 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9D070341; Thu, 6 Jun 2019 02:32:04 -0700 (PDT) Received: from e112298-lin.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7EB983F690; Thu, 6 Jun 2019 02:32:02 -0700 (PDT) From: Julien Thierry To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, rostedt@goodmis.org, marc.zyngier@arm.com, yuzenghui@huawei.com, wanghaibin.wang@huawei.com, james.morse@arm.com, will.deacon@arm.com, catalin.marinas@arm.com, mark.rutland@arm.com, liwei391@huawei.com, Julien Thierry Subject: [PATCH v3 0/8] arm64: IRQ priority masking and Pseudo-NMI fixes Date: Thu, 6 Jun 2019 10:31:49 +0100 Message-Id: <1559813517-41540-1-git-send-email-julien.thierry@arm.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Version one[1] of this series attempted to fix the issue reported by Zenghui[2] when using the function_graph tracer with IRQ priority masking. Since then, I realized that priority masking and the use of Pseudo-NMIs was more broken than I thought. * Patch 1-2 are just some cleanup * Patch 3 fixes a potential issue with not clobbering condition flags in irqflags operations * Patch 4 fixes an issue where calling C code in Pseudo-NMI before entering NMI enter could lead to potential races * Patch 5 fixes the function_graph issue when using priority masking * Patch 6 introduces some debug to hopefully avoid breaking things in the future * Patch 7 is a rebased version of the patch sent by Wei Li[3] fixing an error that can happen during on some platform using the priority masking feature * Patch 8 re-enables the Pseudo-NMI selection Changes since V2 [4]: - Rebase on v5.2-rc3 - clobber conditions flags for asm that needs it as pointed out by Marc Z. and Robin M. - Fix the naming of the new PMR bit value - Introduce some helper for the debug conditions - use WARN_ONCE for debug that might be very noisy - Reenable pseudo NMI. Changes since V1 [1]: - Fix possible race condition between NMI and trace irqflags - Simplify the representation of PSR.I in the PMR value - Include Wei Li's fix - Rebase on v5.1-rc7 [1] https://marc.info/?l=linux-arm-kernel&m=155542458004480&w=2 [2] https://www.spinics.net/lists/arm-kernel/msg716956.html [3] https://www.spinics.net/lists/arm-kernel/msg722171.html [4] https://lkml.org/lkml/2019/4/29/643 Cheers, Julien --> Julien Thierry (7): arm64: Do not enable IRQs for ct_user_exit arm64: irqflags: Pass flags as readonly operand to restore instruction arm64: irqflags: Add condition flags to inline asm clobber list arm64: Fix interrupt tracing in the presence of NMIs arm64: Fix incorrect irqflag restore for priority masking arm64: irqflags: Introduce explicit debugging for IRQ priorities arm64: Allow selecting Pseudo-NMI again Wei Li (1): arm64: fix kernel stack overflow in kdump capture kernel arch/arm64/Kconfig | 12 +++++- arch/arm64/include/asm/arch_gicv3.h | 4 +- arch/arm64/include/asm/cpufeature.h | 6 +++ arch/arm64/include/asm/daifflags.h | 75 +++++++++++++++++++++------------ arch/arm64/include/asm/irqflags.h | 79 +++++++++++++++++----------------- arch/arm64/include/asm/kvm_host.h | 7 ++-- arch/arm64/include/asm/ptrace.h | 10 ++++- arch/arm64/kernel/entry.S | 84 +++++++++++++++++++++++++++++-------- arch/arm64/kernel/irq.c | 26 ++++++++++++ arch/arm64/kernel/process.c | 2 +- arch/arm64/kernel/smp.c | 6 +-- arch/arm64/kvm/hyp/switch.c | 2 +- drivers/irqchip/irq-gic-v3.c | 6 +++ kernel/irq/irqdesc.c | 8 +++- 14 files changed, 227 insertions(+), 100 deletions(-) -- 1.9.1