From patchwork Mon Jun 15 09:31:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604453 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 690CF618 for ; Mon, 15 Jun 2020 09:32:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 575CC206B7 for ; Mon, 15 Jun 2020 09:32:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729402AbgFOJcU (ORCPT ); Mon, 15 Jun 2020 05:32:20 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:45266 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729352AbgFOJcS (ORCPT ); Mon, 15 Jun 2020 05:32:18 -0400 Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05F9BogK014198; Mon, 15 Jun 2020 05:32:17 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 31p5eu9mn0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Jun 2020 05:32:14 -0400 Received: from m0127361.ppops.net (m0127361.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 05F8RA6l061226; Mon, 15 Jun 2020 05:32:12 -0400 Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 31p5eu9mju-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Jun 2020 05:32:12 -0400 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 05F9Lae9012944; Mon, 15 Jun 2020 09:32:06 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma04ams.nl.ibm.com with ESMTP id 31mpe7u8w5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Jun 2020 09:32:05 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 05F9W3GT3211662 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 15 Jun 2020 09:32:03 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7B08152075; Mon, 15 Jun 2020 09:32:03 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.1.141]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 1FF3152073; Mon, 15 Jun 2020 09:32:03 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 01/12] s390x: Use PSW bits definitions in cstart Date: Mon, 15 Jun 2020 11:31:50 +0200 Message-Id: <1592213521-19390-2-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 cotscore=-2147483648 adultscore=0 mlxlogscore=999 mlxscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1015 malwarescore=0 suspectscore=1 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch defines the PSW bits EA/BA used to initialize the PSW masks for exceptions. Since some PSW mask definitions exist already in arch_def.h we add these definitions there. We move all PSW definitions together and protect assembler code against C syntax. Signed-off-by: Pierre Morel Reviewed-by: Janosch Frank Reviewed-by: Thomas Huth --- lib/s390x/asm/arch_def.h | 15 +++++++++++---- s390x/cstart64.S | 15 ++++++++------- 2 files changed, 19 insertions(+), 11 deletions(-) diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h index 1b3bb0c..b5d7aca 100644 --- a/lib/s390x/asm/arch_def.h +++ b/lib/s390x/asm/arch_def.h @@ -10,15 +10,21 @@ #ifndef _ASM_S390X_ARCH_DEF_H_ #define _ASM_S390X_ARCH_DEF_H_ +#define PSW_MASK_EXT 0x0100000000000000UL +#define PSW_MASK_DAT 0x0400000000000000UL +#define PSW_MASK_SHORT_PSW 0x0008000000000000UL +#define PSW_MASK_PSTATE 0x0001000000000000UL +#define PSW_MASK_BA 0x0000000080000000UL +#define PSW_MASK_EA 0x0000000100000000UL + +#define PSW_MASK_ON_EXCEPTION (PSW_MASK_EA | PSW_MASK_BA) + +#ifndef __ASSEMBLER__ struct psw { uint64_t mask; uint64_t addr; }; -#define PSW_MASK_EXT 0x0100000000000000UL -#define PSW_MASK_DAT 0x0400000000000000UL -#define PSW_MASK_PSTATE 0x0001000000000000UL - #define CR0_EXTM_SCLP 0x0000000000000200UL #define CR0_EXTM_EXTC 0x0000000000002000UL #define CR0_EXTM_EMGC 0x0000000000004000UL @@ -297,4 +303,5 @@ static inline uint32_t get_prefix(void) return current_prefix; } +#endif /* __ASSEMBLER */ #endif diff --git a/s390x/cstart64.S b/s390x/cstart64.S index e084f13..d386f35 100644 --- a/s390x/cstart64.S +++ b/s390x/cstart64.S @@ -12,6 +12,7 @@ */ #include #include +#include .section .init @@ -198,19 +199,19 @@ svc_int: .align 8 reset_psw: - .quad 0x0008000180000000 + .quad PSW_MASK_ON_EXCEPTION | PSW_MASK_SHORT_PSW initial_psw: - .quad 0x0000000180000000, clear_bss_start + .quad PSW_MASK_ON_EXCEPTION, clear_bss_start pgm_int_psw: - .quad 0x0000000180000000, pgm_int + .quad PSW_MASK_ON_EXCEPTION, pgm_int ext_int_psw: - .quad 0x0000000180000000, ext_int + .quad PSW_MASK_ON_EXCEPTION, ext_int mcck_int_psw: - .quad 0x0000000180000000, mcck_int + .quad PSW_MASK_ON_EXCEPTION, mcck_int io_int_psw: - .quad 0x0000000180000000, io_int + .quad PSW_MASK_ON_EXCEPTION, io_int svc_int_psw: - .quad 0x0000000180000000, svc_int + .quad PSW_MASK_ON_EXCEPTION, svc_int initial_cr0: /* enable AFP-register control, so FP regs (+BFP instr) can be used */ .quad 0x0000000000040000 From patchwork Mon Jun 15 09:31:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604461 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 4E88190 for ; Mon, 15 Jun 2020 09:32:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40D2920707 for ; Mon, 15 Jun 2020 09:32:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729301AbgFOJce (ORCPT ); Mon, 15 Jun 2020 05:32:34 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:45326 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729034AbgFOJcO (ORCPT ); Mon, 15 Jun 2020 05:32:14 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05F86CFY167960; Mon, 15 Jun 2020 05:32:13 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 31mut8uxnr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); 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Mon, 15 Jun 2020 09:32:04 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EB39752052; Mon, 15 Jun 2020 09:32:03 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.1.141]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 8AA3952079; Mon, 15 Jun 2020 09:32:03 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 02/12] s390x: Move control register bit definitions and add AFP to them Date: Mon, 15 Jun 2020 11:31:51 +0200 Message-Id: <1592213521-19390-3-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 cotscore=-2147483648 lowpriorityscore=0 malwarescore=0 bulkscore=0 adultscore=0 spamscore=0 mlxlogscore=999 phishscore=0 clxscore=1015 suspectscore=1 priorityscore=1501 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org While adding the definition for the AFP-Register control bit, move all existing definitions for CR0 out of the C zone to the assmbler zone to keep the definitions concerning CR0 together. Signed-off-by: Pierre Morel Reviewed-by: David Hildenbrand Reviewed-by: Janosch Frank Reviewed-by: Cornelia Huck Acked-by: Thomas Huth --- lib/s390x/asm/arch_def.h | 11 ++++++----- s390x/cstart64.S | 2 +- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h index b5d7aca..fa71653 100644 --- a/lib/s390x/asm/arch_def.h +++ b/lib/s390x/asm/arch_def.h @@ -19,17 +19,18 @@ #define PSW_MASK_ON_EXCEPTION (PSW_MASK_EA | PSW_MASK_BA) +#define CR0_EXTM_SCLP 0x0000000000000200UL +#define CR0_EXTM_EXTC 0x0000000000002000UL +#define CR0_EXTM_EMGC 0x0000000000004000UL +#define CR0_EXTM_MASK 0x0000000000006200UL +#define CR0_AFP_REG_CRTL 0x0000000000040000UL + #ifndef __ASSEMBLER__ struct psw { uint64_t mask; uint64_t addr; }; -#define CR0_EXTM_SCLP 0x0000000000000200UL -#define CR0_EXTM_EXTC 0x0000000000002000UL -#define CR0_EXTM_EMGC 0x0000000000004000UL -#define CR0_EXTM_MASK 0x0000000000006200UL - struct lowcore { uint8_t pad_0x0000[0x0080 - 0x0000]; /* 0x0000 */ uint32_t ext_int_param; /* 0x0080 */ diff --git a/s390x/cstart64.S b/s390x/cstart64.S index d386f35..e7327ea 100644 --- a/s390x/cstart64.S +++ b/s390x/cstart64.S @@ -214,4 +214,4 @@ svc_int_psw: .quad PSW_MASK_ON_EXCEPTION, svc_int initial_cr0: /* enable AFP-register control, so FP regs (+BFP instr) can be used */ - .quad 0x0000000000040000 + .quad CR0_AFP_REG_CRTL From patchwork Mon Jun 15 09:31:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604463 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 77A40618 for ; Mon, 15 Jun 2020 09:33:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 68B05206B7 for ; Mon, 15 Jun 2020 09:33:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729139AbgFOJdh (ORCPT ); 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Mon, 15 Jun 2020 09:32:03 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 03/12] s390x: saving regs for interrupts Date: Mon, 15 Jun 2020 11:31:52 +0200 Message-Id: <1592213521-19390-4-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 mlxlogscore=999 priorityscore=1501 impostorscore=0 clxscore=1015 cotscore=-2147483648 mlxscore=0 lowpriorityscore=0 phishscore=0 suspectscore=1 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150078 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org If we use multiple source of interrupts, for example, using SCLP console to print information while using I/O interrupts, we need to have a re-entrant register saving interruption handling. Instead of saving at a static memory address, let's save the base registers, the floating point registers and the floating point control register on the stack in case of I/O interrupts Note that we keep the static register saving to recover from the RESET tests. Signed-off-by: Pierre Morel Acked-by: Janosch Frank Acked-by: Thomas Huth Acked-by: Cornelia Huck --- s390x/cstart64.S | 41 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-) diff --git a/s390x/cstart64.S b/s390x/cstart64.S index e7327ea..7ca9496 100644 --- a/s390x/cstart64.S +++ b/s390x/cstart64.S @@ -119,6 +119,43 @@ memsetxc: lmg %r0, %r15, GEN_LC_SW_INT_GRS .endm +/* Save registers on the stack (r15), so we can have stacked interrupts. */ + .macro SAVE_REGS_STACK + /* Allocate a stack frame for 15 general registers */ + slgfi %r15, 15 * 8 + /* Store registers r0 to r14 on the stack */ + stmg %r0, %r14, 0(%r15) + /* Allocate a stack frame for 16 floating point registers */ + /* The size of a FP register is the size of an double word */ + slgfi %r15, 16 * 8 + /* Save fp register on stack: offset to SP is multiple of reg number */ + .irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + std \i, \i * 8(%r15) + .endr + /* Save fpc, but keep stack aligned on 64bits */ + slgfi %r15, 8 + efpc %r0 + stg %r0, 0(%r15) + .endm + +/* Restore the register in reverse order */ + .macro RESTORE_REGS_STACK + /* Restore fpc */ + lfpc 0(%r15) + algfi %r15, 8 + /* Restore fp register from stack: SP still where it was left */ + /* and offset to SP is a multiple of reg number */ + .irp i, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + ld \i, \i * 8(%r15) + .endr + /* Now that we're done, rewind the stack pointer by 16 double word */ + algfi %r15, 16 * 8 + /* Load the registers from stack */ + lmg %r0, %r14, 0(%r15) + /* Rewind the stack by 15 double word */ + algfi %r15, 15 * 8 + .endm + .section .text /* * load_reset calling convention: @@ -186,9 +223,9 @@ mcck_int: lpswe GEN_LC_MCCK_OLD_PSW io_int: - SAVE_REGS + SAVE_REGS_STACK brasl %r14, handle_io_int - RESTORE_REGS + RESTORE_REGS_STACK lpswe GEN_LC_IO_OLD_PSW svc_int: From patchwork Mon Jun 15 09:31:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604445 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 47708618 for ; Mon, 15 Jun 2020 09:32:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38561206D7 for ; Mon, 15 Jun 2020 09:32:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729337AbgFOJcQ (ORCPT ); Mon, 15 Jun 2020 05:32:16 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:6072 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729155AbgFOJcM (ORCPT ); Mon, 15 Jun 2020 05:32:12 -0400 Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05F9I3xw126464; Mon, 15 Jun 2020 05:32:11 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 31n45cd609-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); 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Mon, 15 Jun 2020 09:32:05 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B99D95206D; Mon, 15 Jun 2020 09:32:04 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.1.141]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 5D5775204E; Mon, 15 Jun 2020 09:32:04 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 04/12] s390x: interrupt registration Date: Mon, 15 Jun 2020 11:31:53 +0200 Message-Id: <1592213521-19390-5-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=1 phishscore=0 adultscore=0 mlxlogscore=777 priorityscore=1501 bulkscore=0 malwarescore=0 spamscore=0 impostorscore=0 clxscore=1015 cotscore=-2147483648 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Let's make it possible to add and remove a custom io interrupt handler, that can be used instead of the normal one. Signed-off-by: Pierre Morel Reviewed-by: Thomas Huth Reviewed-by: David Hildenbrand Reviewed-by: Janosch Frank Acked-by: Cornelia Huck --- lib/s390x/interrupt.c | 23 ++++++++++++++++++++++- lib/s390x/interrupt.h | 8 ++++++++ 2 files changed, 30 insertions(+), 1 deletion(-) create mode 100644 lib/s390x/interrupt.h diff --git a/lib/s390x/interrupt.c b/lib/s390x/interrupt.c index 3a40cac..243b9c2 100644 --- a/lib/s390x/interrupt.c +++ b/lib/s390x/interrupt.c @@ -10,9 +10,9 @@ * under the terms of the GNU Library General Public License version 2. */ #include -#include #include #include +#include static bool pgm_int_expected; static bool ext_int_expected; @@ -144,12 +144,33 @@ void handle_mcck_int(void) stap(), lc->mcck_old_psw.addr); } +static void (*io_int_func)(void); + void handle_io_int(void) { + if (io_int_func) + return io_int_func(); + report_abort("Unexpected io interrupt: on cpu %d at %#lx", stap(), lc->io_old_psw.addr); } +int register_io_int_func(void (*f)(void)) +{ + if (io_int_func) + return -1; + io_int_func = f; + return 0; +} + +int unregister_io_int_func(void (*f)(void)) +{ + if (io_int_func != f) + return -1; + io_int_func = NULL; + return 0; +} + void handle_svc_int(void) { report_abort("Unexpected supervisor call interrupt: on cpu %d at %#lx", diff --git a/lib/s390x/interrupt.h b/lib/s390x/interrupt.h new file mode 100644 index 0000000..1973d26 --- /dev/null +++ b/lib/s390x/interrupt.h @@ -0,0 +1,8 @@ +#ifndef INTERRUPT_H +#define INTERRUPT_H +#include + +int register_io_int_func(void (*f)(void)); +int unregister_io_int_func(void (*f)(void)); + +#endif /* INTERRUPT_H */ From patchwork Mon Jun 15 09:31:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604447 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 1CD7F618 for ; Mon, 15 Jun 2020 09:32:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0DAA620707 for ; 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Mon, 15 Jun 2020 09:32:04 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 05/12] s390x: export the clock get_clock_ms() utility Date: Mon, 15 Jun 2020 11:31:54 +0200 Message-Id: <1592213521-19390-6-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 cotscore=-2147483648 priorityscore=1501 clxscore=1015 phishscore=0 lowpriorityscore=0 suspectscore=1 mlxlogscore=999 malwarescore=0 impostorscore=0 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org To serve multiple times, the function get_clock_ms() is moved from intercept.c test to the new file asm/time.h. Signed-off-by: Pierre Morel Reviewed-by: David Hildenbrand Reviewed-by: Thomas Huth Reviewed-by: Janosch Frank Reviewed-by: Cornelia Huck --- lib/s390x/asm/time.h | 26 ++++++++++++++++++++++++++ s390x/intercept.c | 11 +---------- 2 files changed, 27 insertions(+), 10 deletions(-) create mode 100644 lib/s390x/asm/time.h diff --git a/lib/s390x/asm/time.h b/lib/s390x/asm/time.h new file mode 100644 index 0000000..1791380 --- /dev/null +++ b/lib/s390x/asm/time.h @@ -0,0 +1,26 @@ +/* + * Clock utilities for s390 + * + * Authors: + * Thomas Huth + * + * Copied from the s390/intercept test by: + * Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + */ +#ifndef ASM_S390X_TIME_H +#define ASM_S390X_TIME_H + +static inline uint64_t get_clock_ms(void) +{ + uint64_t clk; + + asm volatile(" stck %0 " : : "Q"(clk) : "memory"); + + /* Bit 51 is incrememented each microsecond */ + return (clk >> (63 - 51)) / 1000; +} + +#endif diff --git a/s390x/intercept.c b/s390x/intercept.c index 5f46b82..2e38257 100644 --- a/s390x/intercept.c +++ b/s390x/intercept.c @@ -14,6 +14,7 @@ #include #include #include +#include static uint8_t pagebuf[PAGE_SIZE * 2] __attribute__((aligned(PAGE_SIZE * 2))); @@ -153,16 +154,6 @@ static void test_testblock(void) check_pgm_int_code(PGM_INT_CODE_ADDRESSING); } -static uint64_t get_clock_ms(void) -{ - uint64_t clk; - - asm volatile(" stck %0 " : : "Q"(clk) : "memory"); - - /* Bit 51 is incrememented each microsecond */ - return (clk >> (63 - 51)) / 1000; -} - struct { const char *name; void (*func)(void); From patchwork Mon Jun 15 09:31:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604441 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 3E3E290 for ; Mon, 15 Jun 2020 09:32:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F8D720707 for ; 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Mon, 15 Jun 2020 09:32:05 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 06/12] s390x: clock and delays caluculations Date: Mon, 15 Jun 2020 11:31:55 +0200 Message-Id: <1592213521-19390-7-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 cotscore=-2147483648 bulkscore=0 mlxscore=0 suspectscore=1 adultscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 spamscore=0 mlxlogscore=936 lowpriorityscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The hardware gives us a good definition of the microsecond, let's keep this information and let the routine accessing the hardware keep all the information and return microseconds. Calculate delays in microseconds and take care about wrapping around zero. Define values with macros and use inlines to keep the milliseconds interface. Signed-off-by: Pierre Morel Reviewed-by: Thomas Huth Acked-by: Cornelia Huck Reviewed-by: Janosch Frank --- lib/s390x/asm/time.h | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/lib/s390x/asm/time.h b/lib/s390x/asm/time.h index 1791380..7f1d891 100644 --- a/lib/s390x/asm/time.h +++ b/lib/s390x/asm/time.h @@ -13,14 +13,39 @@ #ifndef ASM_S390X_TIME_H #define ASM_S390X_TIME_H -static inline uint64_t get_clock_ms(void) +#define STCK_SHIFT_US (63 - 51) +#define STCK_MAX ((1UL << 52) - 1) + +static inline uint64_t get_clock_us(void) { uint64_t clk; asm volatile(" stck %0 " : : "Q"(clk) : "memory"); /* Bit 51 is incrememented each microsecond */ - return (clk >> (63 - 51)) / 1000; + return clk >> STCK_SHIFT_US; +} + +static inline void udelay(unsigned long us) +{ + unsigned long startclk = get_clock_us(); + unsigned long c; + + do { + c = get_clock_us(); + if (c < startclk) + c += STCK_MAX; + } while (c < startclk + us); +} + +static inline void mdelay(unsigned long ms) +{ + udelay(ms * 1000); +} + +static inline uint64_t get_clock_ms(void) +{ + return get_clock_us() / 1000; } #endif From patchwork Mon Jun 15 09:31:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604443 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 9F2DF90 for ; Mon, 15 Jun 2020 09:32:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8E82320707 for ; Mon, 15 Jun 2020 09:32:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729328AbgFOJcO (ORCPT ); Mon, 15 Jun 2020 05:32:14 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:11050 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728895AbgFOJcL (ORCPT ); Mon, 15 Jun 2020 05:32:11 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05F86k6w007909; 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Mon, 15 Jun 2020 09:32:08 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 05F9W6f064225658 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 15 Jun 2020 09:32:06 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E50695204E; Mon, 15 Jun 2020 09:32:05 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.1.141]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 912D952054; Mon, 15 Jun 2020 09:32:05 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 07/12] s390x: define function to wait for interrupt Date: Mon, 15 Jun 2020 11:31:56 +0200 Message-Id: <1592213521-19390-8-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=659 malwarescore=0 bulkscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 mlxscore=0 spamscore=0 suspectscore=1 cotscore=-2147483648 adultscore=0 impostorscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Allow the program to wait for an interrupt. The interrupt handler is in charge to remove the WAIT bit when it finished handling the interrupt. Signed-off-by: Pierre Morel Reviewed-by: Janosch Frank Reviewed-by: Cornelia Huck Reviewed-by: Thomas Huth --- lib/s390x/asm/arch_def.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h index fa71653..ff2ee20 100644 --- a/lib/s390x/asm/arch_def.h +++ b/lib/s390x/asm/arch_def.h @@ -10,9 +10,11 @@ #ifndef _ASM_S390X_ARCH_DEF_H_ #define _ASM_S390X_ARCH_DEF_H_ +#define PSW_MASK_IO 0x0200000000000000UL #define PSW_MASK_EXT 0x0100000000000000UL #define PSW_MASK_DAT 0x0400000000000000UL #define PSW_MASK_SHORT_PSW 0x0008000000000000UL +#define PSW_MASK_WAIT 0x0002000000000000UL #define PSW_MASK_PSTATE 0x0001000000000000UL #define PSW_MASK_BA 0x0000000080000000UL #define PSW_MASK_EA 0x0000000100000000UL @@ -253,6 +255,18 @@ static inline void load_psw_mask(uint64_t mask) : "+r" (tmp) : "a" (&psw) : "memory", "cc" ); } +static inline void wait_for_interrupt(uint64_t irq_mask) +{ + uint64_t psw_mask = extract_psw_mask(); + + load_psw_mask(psw_mask | irq_mask | PSW_MASK_WAIT); + /* + * After being woken and having processed the interrupt, let's restore + * the PSW mask. + */ + load_psw_mask(psw_mask); +} + static inline void enter_pstate(void) { uint64_t mask; From patchwork Mon Jun 15 09:31:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604449 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 30D5C90 for ; Mon, 15 Jun 2020 09:32:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2293220707 for ; Mon, 15 Jun 2020 09:32:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729362AbgFOJcS (ORCPT ); Mon, 15 Jun 2020 05:32:18 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:29432 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729148AbgFOJcM (ORCPT ); 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Mon, 15 Jun 2020 09:32:08 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 05F9W6a053805440 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 15 Jun 2020 09:32:06 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4DAD55204E; Mon, 15 Jun 2020 09:32:06 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.1.141]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id ECF6952065; Mon, 15 Jun 2020 09:32:05 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 08/12] s390x: retrieve decimal and hexadecimal kernel parameters Date: Mon, 15 Jun 2020 11:31:57 +0200 Message-Id: <1592213521-19390-9-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 suspectscore=1 malwarescore=0 cotscore=-2147483648 clxscore=1015 adultscore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 mlxscore=0 impostorscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org We often need to retrieve hexadecimal kernel parameters. Let's implement a shared utility to do it. Signed-off-by: Pierre Morel Reviewed-by: Thomas Huth Acked-by: Cornelia Huck --- lib/s390x/kernel-args.c | 60 +++++++++++++++++++++++++++++++++++++++++ lib/s390x/kernel-args.h | 18 +++++++++++++ s390x/Makefile | 1 + 3 files changed, 79 insertions(+) create mode 100644 lib/s390x/kernel-args.c create mode 100644 lib/s390x/kernel-args.h diff --git a/lib/s390x/kernel-args.c b/lib/s390x/kernel-args.c new file mode 100644 index 0000000..2d3b2c2 --- /dev/null +++ b/lib/s390x/kernel-args.c @@ -0,0 +1,60 @@ +/* + * Retrieving kernel arguments + * + * Copyright (c) 2020 IBM Corp + * + * Authors: + * Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + */ + +#include +#include +#include +#include + +static const char *hex_digit = "0123456789abcdef"; + +static unsigned long htol(char *s) +{ + unsigned long v = 0, shift = 0, value = 0; + int i, digit, len = strlen(s); + + for (shift = 0, i = len - 1; i >= 0; i--, shift += 4) { + digit = s[i] | 0x20; /* Set lowercase */ + if (!strchr(hex_digit, digit)) + return 0; /* this is not a digit ! */ + + if (digit <= '9') + v = digit - '0'; + else + v = digit - 'a' + 10; + value += (v << shift); + } + + return value; +} + +int kernel_arg(int argc, char *argv[], const char *str, unsigned long *val) +{ + int i, ret; + char *p, *q; + + for (i = 0; i < argc; i++) { + ret = strncmp(argv[i], str, strlen(str)); + if (ret) + continue; + p = strchr(argv[i], '='); + if (!p) + return -1; + q = strchr(p, 'x'); + if (!q) + *val = atol(p + 1); + else + *val = htol(q + 1); + return 0; + } + return -2; +} diff --git a/lib/s390x/kernel-args.h b/lib/s390x/kernel-args.h new file mode 100644 index 0000000..a88e34e --- /dev/null +++ b/lib/s390x/kernel-args.h @@ -0,0 +1,18 @@ +/* + * Kernel argument + * + * Copyright (c) 2020 IBM Corp + * + * Authors: + * Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + */ + +#ifndef KERNEL_ARGS_H +#define KERNEL_ARGS_H + +int kernel_arg(int argc, char *argv[], const char *str, unsigned long *val); + +#endif diff --git a/s390x/Makefile b/s390x/Makefile index ddb4b48..47a94cc 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -51,6 +51,7 @@ cflatobjs += lib/s390x/sclp-console.o cflatobjs += lib/s390x/interrupt.o cflatobjs += lib/s390x/mmu.o cflatobjs += lib/s390x/smp.o +cflatobjs += lib/s390x/kernel-args.o OBJDIRS += lib/s390x From patchwork Mon Jun 15 09:31:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604457 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 A20DD618 for ; Mon, 15 Jun 2020 09:32:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8755D20707 for ; Mon, 15 Jun 2020 09:32:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729330AbgFOJcf (ORCPT ); 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Mon, 15 Jun 2020 09:32:06 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 09/12] s390x: Library resources for CSS tests Date: Mon, 15 Jun 2020 11:31:58 +0200 Message-Id: <1592213521-19390-10-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 cotscore=-2147483648 priorityscore=1501 clxscore=1015 phishscore=0 lowpriorityscore=0 suspectscore=1 mlxlogscore=999 malwarescore=0 impostorscore=0 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Provide some definitions and library routines that can be used by tests targeting the channel subsystem. Signed-off-by: Pierre Morel Acked-by: Thomas Huth Reviewed-by: Cornelia Huck Acked-by: Janosch Frank --- lib/s390x/css.h | 256 +++++++++++++++++++++++++++++++++++++++++++ lib/s390x/css_dump.c | 153 ++++++++++++++++++++++++++ s390x/Makefile | 1 + 3 files changed, 410 insertions(+) create mode 100644 lib/s390x/css.h create mode 100644 lib/s390x/css_dump.c diff --git a/lib/s390x/css.h b/lib/s390x/css.h new file mode 100644 index 0000000..0ddceb1 --- /dev/null +++ b/lib/s390x/css.h @@ -0,0 +1,256 @@ +/* + * CSS definitions + * + * Copyright IBM, Corp. 2020 + * Author: Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + */ + +#ifndef CSS_H +#define CSS_H + +/* subchannel ID bit 16 must always be one */ +#define SCHID_ONE 0x00010000 + +#define CCW_F_CD 0x80 +#define CCW_F_CC 0x40 +#define CCW_F_SLI 0x20 +#define CCW_F_SKP 0x10 +#define CCW_F_PCI 0x08 +#define CCW_F_IDA 0x04 +#define CCW_F_S 0x02 +#define CCW_F_MIDA 0x01 + +#define CCW_C_NOP 0x03 +#define CCW_C_TIC 0x08 + +struct ccw1 { + uint8_t code; + uint8_t flags; + uint16_t count; + uint32_t data_address; +} __attribute__ ((aligned(8))); + +#define ORB_CTRL_KEY 0xf0000000 +#define ORB_CTRL_SPND 0x08000000 +#define ORB_CTRL_STR 0x04000000 +#define ORB_CTRL_MOD 0x02000000 +#define ORB_CTRL_SYNC 0x01000000 +#define ORB_CTRL_FMT 0x00800000 +#define ORB_CTRL_PFCH 0x00400000 +#define ORB_CTRL_ISIC 0x00200000 +#define ORB_CTRL_ALCC 0x00100000 +#define ORB_CTRL_SSIC 0x00080000 +#define ORB_CTRL_CPTC 0x00040000 +#define ORB_CTRL_C64 0x00020000 +#define ORB_CTRL_I2K 0x00010000 +#define ORB_CTRL_LPM 0x0000ff00 +#define ORB_CTRL_ILS 0x00000080 +#define ORB_CTRL_MIDAW 0x00000040 +#define ORB_CTRL_ORBX 0x00000001 + +#define ORB_LPM_DFLT 0x00008000 + +struct orb { + uint32_t intparm; + uint32_t ctrl; + uint32_t cpa; + uint32_t prio; + uint32_t reserved[4]; +} __attribute__ ((aligned(4))); + +struct scsw { + uint32_t ctrl; + uint32_t ccw_addr; + uint8_t dev_stat; + uint8_t sch_stat; + uint16_t count; +}; + +struct pmcw { + uint32_t intparm; +#define PMCW_DNV 0x0001 +#define PMCW_ENABLE 0x0080 + uint16_t flags; + uint16_t devnum; + uint8_t lpm; + uint8_t pnom; + uint8_t lpum; + uint8_t pim; + uint16_t mbi; + uint8_t pom; + uint8_t pam; + uint8_t chpid[8]; + uint32_t flags2; +}; +#define PMCW_CHANNEL_TYPE(pmcw) (pmcw->flags2 >> 21) + +struct schib { + struct pmcw pmcw; + struct scsw scsw; + uint8_t md[12]; +} __attribute__ ((aligned(4))); + +struct irb { + struct scsw scsw; + uint32_t esw[5]; + uint32_t ecw[8]; + uint32_t emw[8]; +} __attribute__ ((aligned(4))); + +/* CSS low level access functions */ + +static inline int ssch(unsigned long schid, struct orb *addr) +{ + register long long reg1 asm("1") = schid; + int cc; + + asm volatile( + " ssch 0(%2)\n" + " ipm %0\n" + " srl %0,28\n" + : "=d" (cc) + : "d" (reg1), "a" (addr), "m" (*addr) + : "cc", "memory"); + return cc; +} + +static inline int stsch(unsigned long schid, struct schib *addr) +{ + register unsigned long reg1 asm ("1") = schid; + int cc; + + asm volatile( + " stsch 0(%3)\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc), "=m" (*addr) + : "d" (reg1), "a" (addr) + : "cc"); + return cc; +} + +static inline int msch(unsigned long schid, struct schib *addr) +{ + register unsigned long reg1 asm ("1") = schid; + int cc; + + asm volatile( + " msch 0(%3)\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc) + : "d" (reg1), "m" (*addr), "a" (addr) + : "cc"); + return cc; +} + +static inline int tsch(unsigned long schid, struct irb *addr) +{ + register unsigned long reg1 asm ("1") = schid; + int cc; + + asm volatile( + " tsch 0(%3)\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc), "=m" (*addr) + : "d" (reg1), "a" (addr) + : "cc"); + return cc; +} + +static inline int hsch(unsigned long schid) +{ + register unsigned long reg1 asm("1") = schid; + int cc; + + asm volatile( + " hsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc) + : "d" (reg1) + : "cc"); + return cc; +} + +static inline int xsch(unsigned long schid) +{ + register unsigned long reg1 asm("1") = schid; + int cc; + + asm volatile( + " xsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc) + : "d" (reg1) + : "cc"); + return cc; +} + +static inline int csch(unsigned long schid) +{ + register unsigned long reg1 asm("1") = schid; + int cc; + + asm volatile( + " csch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc) + : "d" (reg1) + : "cc"); + return cc; +} + +static inline int rsch(unsigned long schid) +{ + register unsigned long reg1 asm("1") = schid; + int cc; + + asm volatile( + " rsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc) + : "d" (reg1) + : "cc"); + return cc; +} + +static inline int rchp(unsigned long chpid) +{ + register unsigned long reg1 asm("1") = chpid; + int cc; + + asm volatile( + " rchp\n" + " ipm %0\n" + " srl %0,28" + : "=d" (cc) + : "d" (reg1) + : "cc"); + return cc; +} + +/* Debug functions */ +char *dump_pmcw_flags(uint16_t f); +char *dump_scsw_flags(uint32_t f); + +void dump_scsw(struct scsw *scsw); +void dump_irb(struct irb *irbp); +void dump_schib(struct schib *sch); +struct ccw1 *dump_ccw(struct ccw1 *cp); +void dump_irb(struct irb *irbp); +void dump_pmcw(struct pmcw *p); +void dump_orb(struct orb *op); + +int css_enumerate(void); +#define MAX_ENABLE_RETRIES 5 +int css_enable(int schid); + +#endif diff --git a/lib/s390x/css_dump.c b/lib/s390x/css_dump.c new file mode 100644 index 0000000..0c2b64e --- /dev/null +++ b/lib/s390x/css_dump.c @@ -0,0 +1,153 @@ +/* + * Channel subsystem structures dumping + * + * Copyright (c) 2020 IBM Corp. + * + * Authors: + * Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + * + * Description: + * Provides the dumping functions for various structures used by subchannels: + * - ORB : Operation request block, describes the I/O operation and points to + * a CCW chain + * - CCW : Channel Command Word, describes the command, data and flow control + * - IRB : Interuption response Block, describes the result of an operation; + * holds a SCSW and model-dependent data. + * - SCHIB: SubCHannel Information Block composed of: + * - SCSW: SubChannel Status Word, status of the channel. + * - PMCW: Path Management Control Word + * You need the QEMU ccw-pong device in QEMU to answer the I/O transfers. + */ + +#include +#include +#include +#include + +#include + +/* + * Try to have a more human representation of the SCSW flags: + * each letter in the two strings represents the first + * letter of the associated bit in the flag fields. + */ +static const char *scsw_str = "kkkkslccfpixuzen"; +static const char *scsw_str2 = "1SHCrshcsdsAIPSs"; +static char scsw_line[64] = {}; + +char *dump_scsw_flags(uint32_t f) +{ + int i; + + for (i = 0; i < 16; i++) { + if ((f << i) & 0x80000000) + scsw_line[i] = scsw_str[i]; + else + scsw_line[i] = '_'; + } + scsw_line[i] = ' '; + for (; i < 32; i++) { + if ((f << i) & 0x80000000) + scsw_line[i + 1] = scsw_str2[i - 16]; + else + scsw_line[i + 1] = '_'; + } + return scsw_line; +} + +/* + * Try to have a more human representation of the PMCW flags + * each letter in the string represents the first + * letter of the associated bit in the flag fields. + */ +static const char *pmcw_str = "11iii111ellmmdtv"; +static char pcmw_line[32] = {}; +char *dump_pmcw_flags(uint16_t f) +{ + int i; + + for (i = 0; i < 16; i++) { + if ((f << i) & 0x8000) + pcmw_line[i] = pmcw_str[i]; + else + pcmw_line[i] = '_'; + } + return pcmw_line; +} + +void dump_scsw(struct scsw *s) +{ + dump_scsw_flags(s->ctrl); + printf("scsw->flags: %s\n", scsw_line); + printf("scsw->addr : %08x\n", s->ccw_addr); + printf("scsw->devs : %02x\n", s->dev_stat); + printf("scsw->schs : %02x\n", s->sch_stat); + printf("scsw->count: %04x\n", s->count); +} + +void dump_irb(struct irb *irbp) +{ + int i; + uint32_t *p = (uint32_t *)irbp; + + dump_scsw(&irbp->scsw); + for (i = 0; i < sizeof(*irbp)/sizeof(*p); i++, p++) + printf("irb[%02x] : %08x\n", i, *p); +} + +void dump_pmcw(struct pmcw *p) +{ + int i; + + printf("pmcw->intparm : %08x\n", p->intparm); + printf("pmcw->flags : %04x\n", p->flags); + dump_pmcw_flags(p->flags); + printf("pmcw->devnum : %04x\n", p->devnum); + printf("pmcw->lpm : %02x\n", p->lpm); + printf("pmcw->pnom : %02x\n", p->pnom); + printf("pmcw->lpum : %02x\n", p->lpum); + printf("pmcw->pim : %02x\n", p->pim); + printf("pmcw->mbi : %04x\n", p->mbi); + printf("pmcw->pom : %02x\n", p->pom); + printf("pmcw->pam : %02x\n", p->pam); + printf("pmcw->mbi : %04x\n", p->mbi); + for (i = 0; i < 8; i++) + printf("pmcw->chpid[%d]: %02x\n", i, p->chpid[i]); + printf("pmcw->flags2 : %08x\n", p->flags2); +} + +void dump_schib(struct schib *sch) +{ + struct pmcw *p = &sch->pmcw; + struct scsw *s = &sch->scsw; + + printf("--SCHIB--\n"); + dump_pmcw(p); + dump_scsw(s); +} + +struct ccw1 *dump_ccw(struct ccw1 *cp) +{ + printf("CCW: code: %02x flags: %02x count: %04x data: %08x\n", cp->code, + cp->flags, cp->count, cp->data_address); + + if (cp->code == CCW_C_TIC) + return (struct ccw1 *)(long)cp->data_address; + + return (cp->flags & CCW_F_CC) ? cp + 1 : NULL; +} + +void dump_orb(struct orb *op) +{ + struct ccw1 *cp; + + printf("ORB: intparm : %08x\n", op->intparm); + printf("ORB: ctrl : %08x\n", op->ctrl); + printf("ORB: prio : %08x\n", op->prio); + cp = (struct ccw1 *)(long) (op->cpa); + while (cp) + cp = dump_ccw(cp); +} diff --git a/s390x/Makefile b/s390x/Makefile index 47a94cc..3cb97da 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -52,6 +52,7 @@ cflatobjs += lib/s390x/interrupt.o cflatobjs += lib/s390x/mmu.o cflatobjs += lib/s390x/smp.o cflatobjs += lib/s390x/kernel-args.o +cflatobjs += lib/s390x/css_dump.o OBJDIRS += lib/s390x From patchwork Mon Jun 15 09:31:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604455 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 C407D90 for ; Mon, 15 Jun 2020 09:32:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B473D206D7 for ; Mon, 15 Jun 2020 09:32:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729505AbgFOJcW (ORCPT ); Mon, 15 Jun 2020 05:32:22 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:63748 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729380AbgFOJcU (ORCPT ); Mon, 15 Jun 2020 05:32:20 -0400 Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05F9Tamv060038; Mon, 15 Jun 2020 05:32:19 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 31p5eu9mpu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); 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Mon, 15 Jun 2020 09:30:50 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 17DCE5204E; Mon, 15 Jun 2020 09:32:07 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.1.141]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id B492552054; Mon, 15 Jun 2020 09:32:06 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 10/12] s390x: css: stsch, enumeration test Date: Mon, 15 Jun 2020 11:31:59 +0200 Message-Id: <1592213521-19390-11-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 cotscore=-2147483648 adultscore=0 mlxlogscore=999 mlxscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1015 malwarescore=0 suspectscore=1 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org First step for testing the channel subsystem is to enumerate the css and retrieve the css devices. This tests the success of STSCH I/O instruction, we do not test the reaction of the VM for an instruction with wrong parameters. Signed-off-by: Pierre Morel Acked-by: Thomas Huth Reviewed-by: Cornelia Huck --- lib/s390x/css_lib.c | 70 +++++++++++++++++++++++++++++++++++++++++++++ s390x/Makefile | 2 ++ s390x/css.c | 55 +++++++++++++++++++++++++++++++++++ s390x/unittests.cfg | 4 +++ 4 files changed, 131 insertions(+) create mode 100644 lib/s390x/css_lib.c create mode 100644 s390x/css.c diff --git a/lib/s390x/css_lib.c b/lib/s390x/css_lib.c new file mode 100644 index 0000000..b0a0294 --- /dev/null +++ b/lib/s390x/css_lib.c @@ -0,0 +1,70 @@ +/* + * Channel Subsystem tests library + * + * Copyright (c) 2020 IBM Corp + * + * Authors: + * Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + */ +#include +#include +#include +#include +#include +#include + +#include + +static struct schib schib; + +/* + * css_enumerate: + * On success return the first subchannel ID found. + * On error return an invalid subchannel ID containing cc + */ +int css_enumerate(void) +{ + struct pmcw *pmcw = &schib.pmcw; + int scn_found = 0; + int dev_found = 0; + int schid = 0; + int cc; + int scn; + + for (scn = 0; scn < 0xffff; scn++) { + cc = stsch(scn | SCHID_ONE, &schib); + switch (cc) { + case 0: /* 0 means SCHIB stored */ + break; + case 3: /* 3 means no more channels */ + goto out; + default: /* 1 or 2 should never happened for STSCH */ + report_abort("Unexpected error %d on subchannel %08x", + cc, scn | SCHID_ONE); + return cc; + } + + /* We currently only support type 0, a.k.a. I/O channels */ + if (PMCW_CHANNEL_TYPE(pmcw) != 0) + continue; + + /* We ignore I/O channels without valid devices */ + scn_found++; + if (!(pmcw->flags & PMCW_DNV)) + continue; + + /* We keep track of the first device as our test device */ + if (!schid) + schid = scn | SCHID_ONE; + report_info("Found subchannel %08x", scn | SCHID_ONE); + dev_found++; + } + +out: + report_info("Tested subchannels: %d, I/O subchannels: %d, I/O devices: %d", + scn, scn_found, dev_found); + return schid; +} diff --git a/s390x/Makefile b/s390x/Makefile index 3cb97da..afd2c9b 100644 --- a/s390x/Makefile +++ b/s390x/Makefile @@ -17,6 +17,7 @@ tests += $(TEST_DIR)/stsi.elf tests += $(TEST_DIR)/skrf.elf tests += $(TEST_DIR)/smp.elf tests += $(TEST_DIR)/sclp.elf +tests += $(TEST_DIR)/css.elf tests_binary = $(patsubst %.elf,%.bin,$(tests)) all: directories test_cases test_cases_binary @@ -53,6 +54,7 @@ cflatobjs += lib/s390x/mmu.o cflatobjs += lib/s390x/smp.o cflatobjs += lib/s390x/kernel-args.o cflatobjs += lib/s390x/css_dump.o +cflatobjs += lib/s390x/css_lib.o OBJDIRS += lib/s390x diff --git a/s390x/css.c b/s390x/css.c new file mode 100644 index 0000000..230adf5 --- /dev/null +++ b/s390x/css.c @@ -0,0 +1,55 @@ +/* + * Channel Subsystem tests + * + * Copyright (c) 2020 IBM Corp + * + * Authors: + * Pierre Morel + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2. + */ + +#include +#include +#include +#include +#include +#include + +#include + +static int test_device_sid; + +static void test_enumerate(void) +{ + test_device_sid = css_enumerate(); + if (test_device_sid & SCHID_ONE) { + report(1, "First device schid: 0x%08x", test_device_sid); + return; + } + report(0, "No I/O device found"); +} + +static struct { + const char *name; + void (*func)(void); +} tests[] = { + { "enumerate (stsch)", test_enumerate }, + { NULL, NULL } +}; + +int main(int argc, char *argv[]) +{ + int i; + + report_prefix_push("Channel Subsystem"); + for (i = 0; tests[i].name; i++) { + report_prefix_push(tests[i].name); + tests[i].func(); + report_prefix_pop(); + } + report_prefix_pop(); + + return report_summary(); +} diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg index b307329..0f156af 100644 --- a/s390x/unittests.cfg +++ b/s390x/unittests.cfg @@ -84,3 +84,7 @@ extra_params = -m 1G [sclp-3g] file = sclp.elf extra_params = -m 3G + +[css] +file = css.elf +extra_params = -device virtio-net-ccw From patchwork Mon Jun 15 09:32:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604459 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 B587B618 for ; Mon, 15 Jun 2020 09:32:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A803F206D7 for ; Mon, 15 Jun 2020 09:32:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729381AbgFOJch (ORCPT ); Mon, 15 Jun 2020 05:32:37 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:1508 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729284AbgFOJcN (ORCPT ); Mon, 15 Jun 2020 05:32:13 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 05F83gHc050172; Mon, 15 Jun 2020 05:32:12 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 31n301qwj0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); 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Mon, 15 Jun 2020 09:30:50 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 730D952054; Mon, 15 Jun 2020 09:32:07 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.1.141]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 1EE1A5204F; Mon, 15 Jun 2020 09:32:07 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 11/12] s390x: css: msch, enable test Date: Mon, 15 Jun 2020 11:32:00 +0200 Message-Id: <1592213521-19390-12-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 cotscore=-2147483648 bulkscore=0 mlxscore=0 suspectscore=1 adultscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 spamscore=0 mlxlogscore=999 lowpriorityscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org A second step when testing the channel subsystem is to prepare a channel for use. This includes: - Get the current subchannel Information Block (SCHIB) using STSCH - Update it in memory to set the ENABLE bit - Tell the CSS that the SCHIB has been modified using MSCH - Get the SCHIB from the CSS again to verify that the subchannel is enabled. - If the command succeeds but subchannel is not enabled retry a predefined retries count. - If the command fails, report the failure and do not retry, even if cc indicates a busy/status pending as we do not expect this. This tests the MSCH instruction to enable a channel succesfuly. This some retries are done and in case of error, and if the retries count is exceeded, a report is made. Signed-off-by: Pierre Morel Acked-by: Thomas Huth Reviewed-by: Cornelia Huck --- lib/s390x/css_lib.c | 60 +++++++++++++++++++++++++++++++++++++++++++++ s390x/css.c | 15 ++++++++++++ 2 files changed, 75 insertions(+) diff --git a/lib/s390x/css_lib.c b/lib/s390x/css_lib.c index b0a0294..06a76db 100644 --- a/lib/s390x/css_lib.c +++ b/lib/s390x/css_lib.c @@ -15,6 +15,7 @@ #include #include #include +#include #include @@ -68,3 +69,62 @@ out: scn, scn_found, dev_found); return schid; } + +int css_enable(int schid) +{ + struct pmcw *pmcw = &schib.pmcw; + int retry_count = 0; + int cc; + + /* Read the SCHIB for this subchannel */ + cc = stsch(schid, &schib); + if (cc) { + report_info("stsch failed with cc=%d", cc); + return cc; + } + + if (pmcw->flags & PMCW_ENABLE) { + report_info("stsch: sch %08x already enabled", schid); + return 0; + } + +retry: + /* Update the SCHIB to enable the channel */ + pmcw->flags |= PMCW_ENABLE; + + /* Tell the CSS we want to modify the subchannel */ + cc = msch(schid, &schib); + if (cc) { + /* + * If the subchannel is status pending or + * if a function is in progress, + * we consider both cases as errors. + */ + report_info("msch failed with cc=%d", cc); + return cc; + } + + /* + * Read the SCHIB again to verify the enablement + */ + cc = stsch(schid, &schib); + if (cc) { + report_info("stsch failed with cc=%d", cc); + return cc; + } + + if (pmcw->flags & PMCW_ENABLE) { + report_info("Subchannel %08x enabled after %d retries", + schid, retry_count); + return 0; + } + + if (retry_count++ < MAX_ENABLE_RETRIES) { + mdelay(10); /* the hardware was not ready, give it some time */ + goto retry; + } + + report_info("msch: enabling sch %08x failed after %d retries. pmcw flags: %x", + schid, retry_count, pmcw->flags); + return -1; +} diff --git a/s390x/css.c b/s390x/css.c index 230adf5..6948d73 100644 --- a/s390x/css.c +++ b/s390x/css.c @@ -31,11 +31,26 @@ static void test_enumerate(void) report(0, "No I/O device found"); } +static void test_enable(void) +{ + int cc; + + if (!test_device_sid) { + report_skip("No device"); + return; + } + + cc = css_enable(test_device_sid); + + report(cc == 0, "Enable subchannel %08x", test_device_sid); +} + static struct { const char *name; void (*func)(void); } tests[] = { { "enumerate (stsch)", test_enumerate }, + { "enable (msch)", test_enable }, { NULL, NULL } }; From patchwork Mon Jun 15 09:32:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 11604451 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 5E049618 for ; Mon, 15 Jun 2020 09:32:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A6E920707 for ; Mon, 15 Jun 2020 09:32:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729372AbgFOJcT (ORCPT ); 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Mon, 15 Jun 2020 09:32:07 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v9 12/12] s390x: css: ssch/tsch with sense and interrupt Date: Mon, 15 Jun 2020 11:32:01 +0200 Message-Id: <1592213521-19390-13-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> References: <1592213521-19390-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-15_01:2020-06-15,2020-06-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 clxscore=1015 cotscore=-2147483648 mlxscore=0 mlxlogscore=999 impostorscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 suspectscore=1 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006150066 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org After a channel is enabled we start a SENSE_ID command using the SSCH instruction to recognize the control unit and device. This tests the success of SSCH, the I/O interruption and the TSCH instructions. The SENSE_ID command response is tested to report 0xff inside its reserved field and to report the same control unit type as the cu_type kernel argument. Without the cu_type kernel argument, the test expects a device with a default control unit type of 0x3832, a.k.a virtio-net-ccw. Signed-off-by: Pierre Morel --- lib/s390x/css.h | 20 +++++++ lib/s390x/css_lib.c | 46 +++++++++++++++ s390x/css.c | 140 +++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 205 insertions(+), 1 deletion(-) diff --git a/lib/s390x/css.h b/lib/s390x/css.h index 0ddceb1..3091d63 100644 --- a/lib/s390x/css.h +++ b/lib/s390x/css.h @@ -100,6 +100,19 @@ struct irb { uint32_t emw[8]; } __attribute__ ((aligned(4))); +#define CCW_CMD_SENSE_ID 0xe4 +#define CSS_SENSEID_COMMON_LEN 8 +struct senseid { + /* common part */ + uint8_t reserved; /* always 0x'FF' */ + uint16_t cu_type; /* control unit type */ + uint8_t cu_model; /* control unit model */ + uint16_t dev_type; /* device type */ + uint8_t dev_model; /* device model */ + uint8_t unused; /* padding byte */ + uint8_t padding[256 - 10]; /* Extra padding for CCW */ +} __attribute__ ((aligned(4))) __attribute__ ((packed)); + /* CSS low level access functions */ static inline int ssch(unsigned long schid, struct orb *addr) @@ -253,4 +266,11 @@ int css_enumerate(void); #define MAX_ENABLE_RETRIES 5 int css_enable(int schid); + +/* Library functions */ +int start_ccw1_chain(unsigned int sid, struct ccw1 *ccw); +int start_subchannel(unsigned int sid, int code, void *data, int count, + unsigned char flags); +int sch_read_len(int sid); + #endif diff --git a/lib/s390x/css_lib.c b/lib/s390x/css_lib.c index 06a76db..c3d93d3 100644 --- a/lib/s390x/css_lib.c +++ b/lib/s390x/css_lib.c @@ -128,3 +128,49 @@ retry: schid, retry_count, pmcw->flags); return -1; } + +int start_ccw1_chain(unsigned int sid, struct ccw1 *ccw) +{ + struct orb orb = { + .intparm = sid, + .ctrl = ORB_CTRL_ISIC|ORB_CTRL_FMT|ORB_LPM_DFLT, + .cpa = (unsigned int) (unsigned long)ccw, + }; + + return ssch(sid, &orb); +} + +/* + * In the next revisions we will implement the possibility to handle + * CCW chains doing this we will need to work with ccw1 pointers. + * For now we only need a unique CCW. + */ +static struct ccw1 unique_ccw; + +int start_subchannel(unsigned int sid, int code, void *data, int count, + unsigned char flags) +{ + int cc; + struct ccw1 *ccw = &unique_ccw; + + report_prefix_push("start_subchannel"); + /* Build the CCW chain with a single CCW */ + ccw->code = code; + ccw->flags = flags; /* No flags need to be set */ + ccw->count = count; + ccw->data_address = (int)(unsigned long)data; + + cc = start_ccw1_chain(sid, ccw); + if (cc) { + report(0, "start_ccw_chain failed ret=%d", cc); + report_prefix_pop(); + return cc; + } + report_prefix_pop(); + return 0; +} + +int sch_read_len(int sid) +{ + return unique_ccw.count; +} diff --git a/s390x/css.c b/s390x/css.c index 6948d73..6b618a1 100644 --- a/s390x/css.c +++ b/s390x/css.c @@ -16,10 +16,18 @@ #include #include #include +#include #include +#define DEFAULT_CU_TYPE 0x3832 +static unsigned long cu_type = DEFAULT_CU_TYPE; + +struct lowcore *lowcore = (void *)0x0; + static int test_device_sid; +static struct irb irb; +static struct senseid senseid; static void test_enumerate(void) { @@ -45,20 +53,150 @@ static void test_enable(void) report(cc == 0, "Enable subchannel %08x", test_device_sid); } +static void enable_io_isc(void) +{ + /* Let's enable all ISCs for I/O interrupt */ + lctlg(6, 0x00000000ff000000); +} + +static void irq_io(void) +{ + int ret = 0; + char *flags; + int sid; + + report_prefix_push("Interrupt"); + /* Lowlevel set the SID as interrupt parameter. */ + if (lowcore->io_int_param != test_device_sid) { + report(0, + "Bad io_int_param: %x expected %x", + lowcore->io_int_param, test_device_sid); + goto pop; + } + report_prefix_pop(); + + report_prefix_push("tsch"); + sid = lowcore->subsys_id_word; + ret = tsch(sid, &irb); + switch (ret) { + case 1: + dump_irb(&irb); + flags = dump_scsw_flags(irb.scsw.ctrl); + report(0, + "I/O interrupt, CC 1 but tsch reporting sch %08x as not status pending: %s", + sid, flags); + break; + case 2: + report(0, "tsch returns unexpected CC 2"); + break; + case 3: + report(0, "tsch reporting sch %08x as not operational", sid); + break; + case 0: + /* Stay humble on success */ + break; + } +pop: + report_prefix_pop(); + lowcore->io_old_psw.mask &= ~PSW_MASK_WAIT; +} + +/* + * test_sense + * Pre-requisits: + * - We need the test device as the first recognized + * device by the enumeration. + */ +static void test_sense(void) +{ + int ret; + + if (!test_device_sid) { + report_skip("No device"); + return; + } + + ret = css_enable(test_device_sid); + if (ret) { + report(0, + "Could not enable the subchannel: %08x", + test_device_sid); + return; + } + + ret = register_io_int_func(irq_io); + if (ret) { + report(0, "Could not register IRQ handler"); + goto unreg_cb; + } + + lowcore->io_int_param = 0; + + memset(&senseid, 0, sizeof(senseid)); + ret = start_subchannel(test_device_sid, CCW_CMD_SENSE_ID, + &senseid, sizeof(senseid), CCW_F_SLI); + if (ret) { + report(0, "ssch failed for SENSE ID on sch %08x with cc %d", + test_device_sid, ret); + goto unreg_cb; + } + + wait_for_interrupt(PSW_MASK_IO); + + ret = sch_read_len(test_device_sid); + if (ret < CSS_SENSEID_COMMON_LEN) { + report(0, + "ssch succeeded for SENSE ID but report a too short length: %d", + ret); + goto unreg_cb; + } + + if (senseid.reserved != 0xff) { + report(0, + "ssch succeeded for SENSE ID but reports garbage: %x", + senseid.reserved); + goto unreg_cb; + } + + if (lowcore->io_int_param != test_device_sid) + goto unreg_cb; + + report_info("senseid length read: %d", ret); + report_info("reserved %02x cu_type %04x cu_model %02x dev_type %04x dev_model %02x", + senseid.reserved, senseid.cu_type, senseid.cu_model, + senseid.dev_type, senseid.dev_model); + + report(senseid.cu_type == cu_type, "cu_type: expect 0x%04x got 0x%04x", + (uint16_t) cu_type, senseid.cu_type); + +unreg_cb: + unregister_io_int_func(irq_io); +} + static struct { const char *name; void (*func)(void); } tests[] = { { "enumerate (stsch)", test_enumerate }, { "enable (msch)", test_enable }, + { "sense (ssch/tsch)", test_sense }, { NULL, NULL } }; +static unsigned long value; + int main(int argc, char *argv[]) { - int i; + int i, ret; + + ret = kernel_arg(argc, argv, "cu_type=", &value); + if (!ret) + cu_type = (uint16_t)value; + else + report_info("Using cu_type default value: 0x%04lx", cu_type); report_prefix_push("Channel Subsystem"); + enable_io_isc(); for (i = 0; tests[i].name; i++) { report_prefix_push(tests[i].name); tests[i].func();