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=-8.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 095B8C3A59F for ; Mon, 26 Aug 2019 17:14:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D1D0620850 for ; Mon, 26 Aug 2019 17:14:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732879AbfHZROu (ORCPT ); Mon, 26 Aug 2019 13:14:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33618 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731490AbfHZROu (ORCPT ); Mon, 26 Aug 2019 13:14:50 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 43D93C02832B; Mon, 26 Aug 2019 17:14:49 +0000 (UTC) Received: from thuth.remote.csb (ovpn-116-153.ams2.redhat.com [10.36.116.153]) by smtp.corp.redhat.com (Postfix) with ESMTP id F14D2600C8; Mon, 26 Aug 2019 17:14:45 +0000 (UTC) Subject: Re: [kvm-unit-tests PATCH v3 2/5] s390x: Diag288 test To: Janosch Frank , kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, david@redhat.com References: <20190826163502.1298-1-frankja@linux.ibm.com> <20190826163502.1298-3-frankja@linux.ibm.com> From: Thomas Huth Openpgp: preference=signencrypt Autocrypt: addr=thuth@redhat.com; prefer-encrypt=mutual; keydata= mQINBFH7eUwBEACzyOXKU+5Pcs6wNpKzrlJwzRl3VGZt95VCdb+FgoU9g11m7FWcOafrVRwU yYkTm9+7zBUc0sW5AuPGR/dp3pSLX/yFWsA/UB4nJsHqgDvDU7BImSeiTrnpMOTXb7Arw2a2 4CflIyFqjCpfDM4MuTmzTjXq4Uov1giGE9X6viNo1pxyEpd7PanlKNnf4PqEQp06X4IgUacW tSGj6Gcns1bCuHV8OPWLkf4hkRnu8hdL6i60Yxz4E6TqlrpxsfYwLXgEeswPHOA6Mn4Cso9O 0lewVYfFfsmokfAVMKWzOl1Sr0KGI5T9CpmRfAiSHpthhHWnECcJFwl72NTi6kUcUzG4se81 O6n9d/kTj7pzTmBdfwuOZ0YUSqcqs0W+l1NcASSYZQaDoD3/SLk+nqVeCBB4OnYOGhgmIHNW 0CwMRO/GK+20alxzk//V9GmIM2ACElbfF8+Uug3pqiHkVnKqM7W9/S1NH2qmxB6zMiJUHlTH gnVeZX0dgH27mzstcF786uPcdEqS0KJuxh2kk5IvUSL3Qn3ZgmgdxBMyCPciD/1cb7/Ahazr 3ThHQXSHXkH/aDXdfLsKVuwDzHLVSkdSnZdt5HHh75/NFHxwaTlydgfHmFFwodK8y/TjyiGZ zg2Kje38xnz8zKn9iesFBCcONXS7txENTzX0z80WKBhK+XSFJwARAQABtB5UaG9tYXMgSHV0 aCA8dGh1dGhAcmVkaGF0LmNvbT6JAjgEEwECACIFAlVgX6oCGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAAoJEC7Z13T+cC21EbIP/ii9cvT2HHGbFRl8HqGT6+7Wkb+XLMqJBMAIGiQK QIP3xk1HPTsLfVG0ao4hy/oYkGNOP8+ubLnZen6Yq3zAFiMhQ44lvgigDYJo3Ve59gfe99KX EbtB+X95ODARkq0McR6OAsPNJ7gpEUzfkQUUJTXRDQXfG/FX303Gvk+YU0spm2tsIKPl6AmV 1CegDljzjycyfJbk418MQmMu2T82kjrkEofUO2a24ed3VGC0/Uz//XCR2ZTo+vBoBUQl41BD eFFtoCSrzo3yPFS+w5fkH9NT8ChdpSlbNS32NhYQhJtr9zjWyFRf0Zk+T/1P7ECn6gTEkp5k ofFIA4MFBc/fXbaDRtBmPB0N9pqTFApIUI4vuFPPO0JDrII9dLwZ6lO9EKiwuVlvr1wwzsgq zJTPBU3qHaUO4d/8G+gD7AL/6T4zi8Jo/GmjBsnYaTzbm94lf0CjXjsOX3seMhaE6WAZOQQG tZHAO1kAPWpaxne+wtgMKthyPLNwelLf+xzGvrIKvLX6QuLoWMnWldu22z2ICVnLQChlR9d6 WW8QFEpo/FK7omuS8KvvopFcOOdlbFMM8Y/8vBgVMSsK6fsYUhruny/PahprPbYGiNIhKqz7 UvgyZVl4pBFjTaz/SbimTk210vIlkDyy1WuS8Zsn0htv4+jQPgo9rqFE4mipJjy/iboDuQIN BFH7eUwBEAC2nzfUeeI8dv0C4qrfCPze6NkryUflEut9WwHhfXCLjtvCjnoGqFelH/PE9NF4 4VPSCdvD1SSmFVzu6T9qWdcwMSaC+e7G/z0/AhBfqTeosAF5XvKQlAb9ZPkdDr7YN0a1XDfa +NgA+JZB4ROyBZFFAwNHT+HCnyzy0v9Sh3BgJJwfpXHH2l3LfncvV8rgFv0bvdr70U+On2XH 5bApOyW1WpIG5KPJlDdzcQTyptOJ1dnEHfwnABEfzI3dNf63rlxsGouX/NFRRRNqkdClQR3K gCwciaXfZ7ir7fF0u1N2UuLsWA8Ei1JrNypk+MRxhbvdQC4tyZCZ8mVDk+QOK6pyK2f4rMf/ WmqxNTtAVmNuZIwnJdjRMMSs4W4w6N/bRvpqtykSqx7VXcgqtv6eqoDZrNuhGbekQA0sAnCJ VPArerAZGArm63o39me/bRUQeQVSxEBmg66yshF9HkcUPGVeC4B0TPwz+HFcVhheo6hoJjLq knFOPLRj+0h+ZL+D0GenyqD3CyuyeTT5dGcNU9qT74bdSr20k/CklvI7S9yoQje8BeQAHtdV cvO8XCLrpGuw9SgOS7OP5oI26a0548M4KldAY+kqX6XVphEw3/6U1KTf7WxW5zYLTtadjISB X9xsRWSU+Yqs3C7oN5TIPSoj9tXMoxZkCIHWvnqGwZ7JhwARAQABiQIfBBgBAgAJBQJR+3lM AhsMAAoJEC7Z13T+cC21hPAQAIsBL9MdGpdEpvXs9CYrBkd6tS9mbaSWj6XBDfA1AEdQkBOn ZH1Qt7HJesk+qNSnLv6+jP4VwqK5AFMrKJ6IjE7jqgzGxtcZnvSjeDGPF1h2CKZQPpTw890k fy18AvgFHkVk2Oylyexw3aOBsXg6ukN44vIFqPoc+YSU0+0QIdYJp/XFsgWxnFIMYwDpxSHS 5fdDxUjsk3UBHZx+IhFjs2siVZi5wnHIqM7eK9abr2cK2weInTBwXwqVWjsXZ4tq5+jQrwDK cvxIcwXdUTLGxc4/Z/VRH1PZSvfQxdxMGmNTGaXVNfdFZjm4fz0mz+OUi6AHC4CZpwnsliGV ODqwX8Y1zic9viSTbKS01ZNp175POyWViUk9qisPZB7ypfSIVSEULrL347qY/hm9ahhqmn17 Ng255syASv3ehvX7iwWDfzXbA0/TVaqwa1YIkec+/8miicV0zMP9siRcYQkyTqSzaTFBBmqD oiT+z+/E59qj/EKfyce3sbC9XLjXv3mHMrq1tKX4G7IJGnS989E/fg6crv6NHae9Ckm7+lSs IQu4bBP2GxiRQ+NV3iV/KU3ebMRzqIC//DCOxzQNFNJAKldPe/bKZMCxEqtVoRkuJtNdp/5a yXFZ6TfE1hGKrDBYAm4vrnZ4CXFSBDllL59cFFOJCkn4Xboj/aVxxJxF30bn Organization: Red Hat Message-ID: <4855e0bd-2808-ff44-482e-ecc96c7e69ed@redhat.com> Date: Mon, 26 Aug 2019 19:14:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190826163502.1298-3-frankja@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Mon, 26 Aug 2019 17:14:49 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 26/08/2019 18.34, Janosch Frank wrote: > A small test for the watchdog via diag288. > > Minimum timer value is 15 (seconds) and the only supported action with > QEMU is restart. > > Signed-off-by: Janosch Frank > Reviewed-by: Thomas Huth > --- > lib/s390x/asm/arch_def.h | 1 + > s390x/Makefile | 1 + > s390x/diag288.c | 130 +++++++++++++++++++++++++++++++++++++++ > s390x/unittests.cfg | 4 ++ > 4 files changed, 136 insertions(+) > create mode 100644 s390x/diag288.c > > diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h > index d2cd727..4bbb428 100644 > --- a/lib/s390x/asm/arch_def.h > +++ b/lib/s390x/asm/arch_def.h > @@ -15,6 +15,7 @@ struct psw { > uint64_t addr; > }; > > +#define PSW_MASK_EXT 0x0100000000000000UL > #define PSW_MASK_DAT 0x0400000000000000UL > #define PSW_MASK_PSTATE 0x0001000000000000UL > > diff --git a/s390x/Makefile b/s390x/Makefile > index 574a9a2..3453373 100644 > --- a/s390x/Makefile > +++ b/s390x/Makefile > @@ -12,6 +12,7 @@ tests += $(TEST_DIR)/vector.elf > tests += $(TEST_DIR)/gs.elf > tests += $(TEST_DIR)/iep.elf > tests += $(TEST_DIR)/cpumodel.elf > +tests += $(TEST_DIR)/diag288.elf > tests_binary = $(patsubst %.elf,%.bin,$(tests)) > > all: directories test_cases test_cases_binary > diff --git a/s390x/diag288.c b/s390x/diag288.c > new file mode 100644 > index 0000000..a784338 > --- /dev/null > +++ b/s390x/diag288.c > @@ -0,0 +1,130 @@ > +/* > + * Timer Event DIAG288 test > + * > + * Copyright (c) 2019 IBM Corp > + * > + * Authors: > + * Janosch Frank > + * > + * This code is free software; you can redistribute it and/or modify it > + * under the terms of the GNU Library General Public License version 2. > + */ > + > +#include > +#include > +#include > + > +struct lowcore *lc = (struct lowcore *)0x0; > + > +#define CODE_INIT 0 > +#define CODE_CHANGE 1 > +#define CODE_CANCEL 2 > + > +#define ACTION_RESTART 0 > + > +static inline void diag288(unsigned long code, unsigned long time, > + unsigned long action) > +{ > + register unsigned long fc asm("0") = code; > + register unsigned long tm asm("1") = time; > + register unsigned long ac asm("2") = action; > + > + asm volatile("diag %0,%2,0x288" > + : : "d" (fc), "d" (tm), "d" (ac)); > +} > + > +static void test_specs(void) > +{ > + report_prefix_push("specification"); > + > + report_prefix_push("uneven"); > + expect_pgm_int(); > + asm volatile("diag 1,2,0x288"); > + check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); > + report_prefix_pop(); > + > + report_prefix_push("unsupported action"); > + expect_pgm_int(); > + diag288(CODE_INIT, 15, 42); > + check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); > + report_prefix_pop(); > + > + report_prefix_push("unsupported function"); > + expect_pgm_int(); > + diag288(42, 15, ACTION_RESTART); > + check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); > + report_prefix_pop(); > + > + report_prefix_push("no init"); > + expect_pgm_int(); > + diag288(CODE_CANCEL, 15, ACTION_RESTART); > + check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); > + report_prefix_pop(); > + > + report_prefix_push("min timer"); > + expect_pgm_int(); > + diag288(CODE_INIT, 14, ACTION_RESTART); > + check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); > + report_prefix_pop(); > + > + report_prefix_pop(); > +} > + > +static void test_priv(void) > +{ > + report_prefix_push("privileged"); > + expect_pgm_int(); > + enter_pstate(); > + diag288(CODE_INIT, 15, ACTION_RESTART); > + check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION); > + report_prefix_pop(); > +} > + > +static inline void get_tod_clock_ext(char *clk) > +{ > + typedef struct { char _[16]; } addrtype; > + > + asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc"); > +} > + > +static inline unsigned long long get_tod_clock(void) Change the return type to uint64_t, too? > +{ > + char clk[16]; > + > + get_tod_clock_ext(clk); > + return *((uint64_t *)&clk[1]); > +} While this code seems to compile fine with recent versions of GCC, the older version 4.8 complains here: s390x/diag288.c: In function ‘get_tod_clock’: s390x/diag288.c:95:2: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing] return *((uint64_t *)&clk[1]); ^ Looking at the whole code again, I think it would be best to simply use "stck" here instead of "stcke", what do you think? Thomas