From patchwork Tue Jun 14 18:56:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Borntraeger X-Patchwork-Id: 9176671 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 23ED960868 for ; Tue, 14 Jun 2016 19:00:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 08B1F200F5 for ; Tue, 14 Jun 2016 19:00:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F160C282F9; Tue, 14 Jun 2016 19:00:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0CDF8265F9 for ; Tue, 14 Jun 2016 19:00:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753046AbcFNTAK (ORCPT ); Tue, 14 Jun 2016 15:00:10 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:53427 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932111AbcFNS5M (ORCPT ); Tue, 14 Jun 2016 14:57:12 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u5EIsT2e007842 for ; Tue, 14 Jun 2016 14:57:11 -0400 Received: from e06smtp17.uk.ibm.com (e06smtp17.uk.ibm.com [195.75.94.113]) by mx0a-001b2d01.pphosted.com with ESMTP id 23je2kdefh-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 14 Jun 2016 14:57:11 -0400 Received: from localhost by e06smtp17.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 14 Jun 2016 19:57:07 +0100 X-IBM-Helo: d06dlp01.portsmouth.uk.ibm.com X-IBM-MailFrom: borntraeger@de.ibm.com X-IBM-RcptTo: kvm@vger.kernel.org;linux-s390@vger.kernel.org Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by d06dlp01.portsmouth.uk.ibm.com (Postfix) with ESMTP id 9E36217D805A; Tue, 14 Jun 2016 19:58:19 +0100 (BST) Received: from d06av11.portsmouth.uk.ibm.com (d06av11.portsmouth.uk.ibm.com [9.149.37.252]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u5EIv6Tg63307886; Tue, 14 Jun 2016 18:57:06 GMT Received: from d06av11.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av11.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u5EIv5tT016973; Tue, 14 Jun 2016 12:57:06 -0600 Received: from tuxmaker.boeblingen.de.ibm.com (tuxmaker.boeblingen.de.ibm.com [9.152.85.9]) by d06av11.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u5EIv5Ki016959 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 14 Jun 2016 12:57:05 -0600 Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 25651) id 35B5F20F50F; Tue, 14 Jun 2016 20:57:05 +0200 (CEST) From: Christian Borntraeger To: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= Cc: KVM , Cornelia Huck , linux-s390 , Christian Borntraeger , Janosch Frank Subject: [GIT PULL 04/52] KVM: s390: Add operation exception interception handler Date: Tue, 14 Jun 2016 20:56:41 +0200 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1465930649-181383-1-git-send-email-borntraeger@de.ibm.com> References: <1465930649-181383-1-git-send-email-borntraeger@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16061418-0004-0000-0000-00000332663A X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16061418-0005-0000-0000-00001A61905E Message-Id: <1465930649-181383-5-git-send-email-borntraeger@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-06-14_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1606140206 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Janosch Frank This commit introduces code that handles operation exception interceptions. With this handler we can emulate instructions by using illegal opcodes. Signed-off-by: Janosch Frank Reviewed-by: David Hildenbrand Signed-off-by: Christian Borntraeger --- arch/s390/include/asm/kvm_host.h | 1 + arch/s390/kvm/intercept.c | 11 +++++++++++ arch/s390/kvm/kvm-s390.c | 1 + arch/s390/kvm/trace.h | 21 +++++++++++++++++++++ 4 files changed, 34 insertions(+) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 37b9017..093ea14 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -255,6 +255,7 @@ struct kvm_vcpu_stat { u32 instruction_stctg; u32 exit_program_interruption; u32 exit_instr_and_program; + u32 exit_operation_exception; u32 deliver_external_call; u32 deliver_emergency_signal; u32 deliver_service_signal; diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 2e6b54e..09c13db 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -349,6 +349,15 @@ static int handle_partial_execution(struct kvm_vcpu *vcpu) return -EOPNOTSUPP; } +static int handle_operexc(struct kvm_vcpu *vcpu) +{ + vcpu->stat.exit_operation_exception++; + trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa, + vcpu->arch.sie_block->ipb); + + return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); +} + int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) { if (kvm_is_ucontrol(vcpu->kvm)) @@ -370,6 +379,8 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) return handle_validity(vcpu); case 0x28: return handle_stop(vcpu); + case 0x2c: + return handle_operexc(vcpu); case 0x38: return handle_partial_execution(vcpu); default: diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 6d8ec3a..f0addec 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -63,6 +63,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "exit_instruction", VCPU_STAT(exit_instruction) }, { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, + { "exit_operation_exception", VCPU_STAT(exit_operation_exception) }, { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, diff --git a/arch/s390/kvm/trace.h b/arch/s390/kvm/trace.h index 916834d..90d26a6 100644 --- a/arch/s390/kvm/trace.h +++ b/arch/s390/kvm/trace.h @@ -412,6 +412,27 @@ TRACE_EVENT(kvm_s390_handle_stsi, __entry->addr) ); +TRACE_EVENT(kvm_s390_handle_operexc, + TP_PROTO(VCPU_PROTO_COMMON, __u16 ipa, __u32 ipb), + TP_ARGS(VCPU_ARGS_COMMON, ipa, ipb), + + TP_STRUCT__entry( + VCPU_FIELD_COMMON + __field(__u64, instruction) + ), + + TP_fast_assign( + VCPU_ASSIGN_COMMON + __entry->instruction = ((__u64)ipa << 48) | + ((__u64)ipb << 16); + ), + + VCPU_TP_PRINTK("operation exception on instruction %016llx (%s)", + __entry->instruction, + __print_symbolic(icpt_insn_decoder(__entry->instruction), + icpt_insn_codes)) + ); + #endif /* _TRACE_KVM_H */ /* This part must be outside protection */