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=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 678A6C43460 for ; Thu, 1 Apr 2021 18:13:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 42A5560241 for ; Thu, 1 Apr 2021 18:13:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237461AbhDASNx (ORCPT ); Thu, 1 Apr 2021 14:13:53 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:32769 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236957AbhDAR4I (ORCPT ); Thu, 1 Apr 2021 13:56:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1617299768; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=CqTbGA2nnEQCoezWyE1Fpgf0IZLhERcQWs6PZNwBkg4=; b=jFiEEP1ySKt+P33XvxoDDxTYKWJSCcrP6KcaK1ncFumMvSJSIyDlhkiDVVQ+YJJCh0b6B3 oW/crAi4Jc+xaGNTetGQrHI8f65REIM8SsY9AC5DQlEzKNenm8Y+DD4sjJrCOkJio4y0pa DDAXlb8AGKCzQbZfOc2xwboeHxiSUaA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-450-PwIa3jVQOJCoHvlqWy6ukQ-1; Thu, 01 Apr 2021 09:55:06 -0400 X-MC-Unique: PwIa3jVQOJCoHvlqWy6ukQ-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A55FC107B789; Thu, 1 Apr 2021 13:55:02 +0000 (UTC) Received: from localhost.localdomain (unknown [10.35.206.58]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8D0E15D6B1; Thu, 1 Apr 2021 13:54:52 +0000 (UTC) From: Maxim Levitsky To: kvm@vger.kernel.org Cc: x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), Ingo Molnar , Andrew Morton , Thomas Gleixner , Sean Christopherson , Marc Zyngier , Catalin Marinas , linux-kernel@vger.kernel.org (open list), Julien Thierry , Stefano Garzarella , Borislav Petkov , Suzuki K Poulose , Jonathan Corbet , Jessica Yu , "H. Peter Anvin" , Jan Kiszka , Will Deacon , kvmarm@lists.cs.columbia.edu (open list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)), Paolo Bonzini , Vitaly Kuznetsov , Vasily Gorbik , Joerg Roedel , Claudio Imbrenda , Jim Mattson , Cornelia Huck , David Hildenbrand , Maxim Levitsky , Wanpeng Li , Janosch Frank , Christian Borntraeger , linux-s390@vger.kernel.org (open list:S390), Heiko Carstens , Kieran Bingham , linux-doc@vger.kernel.org (open list:DOCUMENTATION), linux-arm-kernel@lists.infradead.org (moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)), James Morse Subject: [PATCH v2 0/9] KVM: my debug patch queue Date: Thu, 1 Apr 2021 16:54:42 +0300 Message-Id: <20210401135451.1004564-1-mlevitsk@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi!=0D =0D I would like to publish two debug features which were needed for other stuf= f=0D I work on.=0D =0D One is the reworked lx-symbols script which now actually works on at least= =0D gdb 9.1 (gdb 9.2 was reported to fail to load the debug symbols from the ke= rnel=0D for some reason, not related to this patch) and upstream qemu.=0D =0D The other feature is the ability to trap all guest exceptions (on SVM for n= ow)=0D and see them in kvmtrace prior to potential merge to double/triple fault.=0D =0D This can be very useful and I already had to manually patch KVM a few=0D times for this.=0D I will, once time permits, implement this feature on Intel as well.=0D =0D V2:=0D =0D * Some more refactoring and workarounds for lx-symbols script=0D =0D * added KVM_GUESTDBG_BLOCKEVENTS flag to enable 'block interrupts on=0D single step' together with KVM_CAP_SET_GUEST_DEBUG2 capability=0D to indicate which guest debug flags are supported.=0D =0D This is a replacement for unconditional block of interrupts on single=0D step that was done in previous version of this patch set.=0D Patches to qemu to use that feature will be sent soon.=0D =0D * Reworked the the 'intercept all exceptions for debug' feature according= =0D to the review feedback:=0D =0D - renamed the parameter that enables the feature and=0D moved it to common kvm module.=0D (only SVM part is currently implemented though)=0D =0D - disable the feature for SEV guests as was suggested during the review= =0D - made the vmexit table const again, as was suggested in the review as w= ell.=0D =0D Best regards,=0D Maxim Levitsky=0D =0D Maxim Levitsky (9):=0D scripts/gdb: rework lx-symbols gdb script=0D KVM: introduce KVM_CAP_SET_GUEST_DEBUG2=0D KVM: x86: implement KVM_CAP_SET_GUEST_DEBUG2=0D KVM: aarch64: implement KVM_CAP_SET_GUEST_DEBUG2=0D KVM: s390x: implement KVM_CAP_SET_GUEST_DEBUG2=0D KVM: x86: implement KVM_GUESTDBG_BLOCKEVENTS=0D KVM: SVM: split svm_handle_invalid_exit=0D KVM: x86: add force_intercept_exceptions_mask=0D KVM: SVM: implement force_intercept_exceptions_mask=0D =0D Documentation/virt/kvm/api.rst | 4 +=0D arch/arm64/include/asm/kvm_host.h | 4 +=0D arch/arm64/kvm/arm.c | 2 +=0D arch/arm64/kvm/guest.c | 5 -=0D arch/s390/include/asm/kvm_host.h | 4 +=0D arch/s390/kvm/kvm-s390.c | 3 +=0D arch/x86/include/asm/kvm_host.h | 12 ++=0D arch/x86/include/uapi/asm/kvm.h | 1 +=0D arch/x86/kvm/svm/svm.c | 87 +++++++++++--=0D arch/x86/kvm/svm/svm.h | 6 +-=0D arch/x86/kvm/x86.c | 14 ++-=0D arch/x86/kvm/x86.h | 2 +=0D include/uapi/linux/kvm.h | 1 +=0D kernel/module.c | 8 +-=0D scripts/gdb/linux/symbols.py | 203 ++++++++++++++++++++----------=0D 15 files changed, 272 insertions(+), 84 deletions(-)=0D =0D -- =0D 2.26.2=0D =0D