From patchwork Mon Sep 2 11:50:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Schlameuss X-Patchwork-Id: 825118 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4F8461D6DB4; Mon, 2 Sep 2024 11:50:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725277830; cv=none; b=gQXtnlh3uHfAKDy/5NLgHZflt0c4npYGC9FdQwxyS201A7fPqCg0G2lMRCDtlDawSe+vzHbkudKD4a7Sd/7SCQO4EQ1pdGbKAvSFbtG2/2C/d7szP6cWTJF1Tf0H9TXdboV3qQ1IBDmXMO0Bx/xqYlAg3ngYI5l4He0O1e2Gtxw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725277830; c=relaxed/simple; bh=Qhtm88/b51qYjOxx1JPR9cs7VGhlD4Q0tMDiADdJUbw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ioD8nY8Sn0uaiToTQstya5NH4p6fji+3RHzyeiXBnBOhcxuXBhBCOXBBxkWOIRcTBKlQNT6BWaiL0y0od8ERg0+5XVwGzejMZ2wSq09PzDf2CSDWpMVIp3dOr3YuumDVaeOEXhfFDh+Kmf7CltDXqSLYxHfRAmBTPwi2143C6ac= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=Kf680px2; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="Kf680px2" Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4823kx1a031390; Mon, 2 Sep 2024 11:50:21 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from :to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=pp1; bh=PyrrxqTVD0dXU Gs/5QvMO8mG7lvbLuDHHlULhaDZ/S0=; b=Kf680px2Y/RgvHMW/SY/J3CuTAHDQ a8ZG9OqOA80H72Tmtc+PLSVZHGuiUWMKMMM4wafar0Wp0ri2Hln3IPC3pdZkBaAQ z57g0LB7pfLzuMC+6Tn0TaTYV7VTuBVcEo8Wl/5vVK1wm7wGp6My48ixXRTfzLmQ cE8IFlOUmAuPIRtjbdiPwE6WFTDl/HfF9GHxRyF7qkwH52dYPcepMObYkbVqCc79 qtEHTvCW4iKeqLZsqgW6jIvqbqaQ7DTC10dvf0h1wLNesxHo9Su8yVHV9ma9sLXq Cas730goUfvLEqz2cqqut/5rD5eF6k9v8LQs6MzbPigYwJV5Vjr54vclw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 41btuwrq8q-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 02 Sep 2024 11:50:21 +0000 (GMT) Received: from m0353729.ppops.net (m0353729.ppops.net [127.0.0.1]) by pps.reinject (8.18.0.8/8.18.0.8) with ESMTP id 482BoLLc026257; Mon, 2 Sep 2024 11:50:21 GMT Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 41btuwrq8d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 02 Sep 2024 11:50:20 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 4828OWf7001015; Mon, 2 Sep 2024 11:50:19 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 41cf0mnvjq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 02 Sep 2024 11:50:19 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 482BoFfD55378380 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 2 Sep 2024 11:50:15 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A3C8E20043; Mon, 2 Sep 2024 11:50:15 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 20FD62004B; Mon, 2 Sep 2024 11:50:15 +0000 (GMT) Received: from darkmoore.ibmuc.com (unknown [9.171.60.16]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 2 Sep 2024 11:50:15 +0000 (GMT) From: Christoph Schlameuss To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, linux-kselftest@vger.kernel.org, Paolo Bonzini , Shuah Khan , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , David Hildenbrand , Nina Schoetterl-Glausch , schlameuss@linux.ibm.com Subject: [PATCH v2 2/3] selftests: kvm: s390: Add uc_skey VM test case Date: Mon, 2 Sep 2024 13:50:01 +0200 Message-ID: <20240902115002.199331-3-schlameuss@linux.ibm.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240902115002.199331-1-schlameuss@linux.ibm.com> References: <20240902115002.199331-1-schlameuss@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: frtBq4cbH3jymq8GV6YJyeQJZJ2xr8KA X-Proofpoint-ORIG-GUID: dKKAHwyXL20-xrdUJv7M3jprcY9rqJxx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-09-02_02,2024-09-02_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 phishscore=0 malwarescore=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 mlxlogscore=857 mlxscore=0 priorityscore=1501 adultscore=0 spamscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2409020094 Add a test case manipulating s390 storage keys from within the ucontrol VM. Signed-off-by: Christoph Schlameuss --- .../selftests/kvm/s390x/ucontrol_test.c | 89 ++++++++++++++++++- 1 file changed, 88 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c b/tools/testing/selftests/kvm/s390x/ucontrol_test.c index 04a0d55af617..331a4109b953 100644 --- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c +++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c @@ -79,6 +79,33 @@ asm("test_mem_asm:\n" " j 0b\n" ); +/* Test program manipulating storage keys */ +extern char test_skey_asm[]; +asm("test_skey_asm:\n" + "xgr %r0, %r0\n" + + "0:\n" + " ahi %r0,1\n" + " st %r1,0(%r5,%r6)\n" + + " iske %r1,%r6\n" + " ahi %r0,1\n" + " diag 0,0,0x44\n" + + " sske %r1,%r6\n" + " xgr %r1,%r1\n" + " iske %r1,%r6\n" + " ahi %r0,1\n" + " diag 0,0,0x44\n" + + " rrbe %r1,%r6\n" + " iske %r1,%r6\n" + " ahi %r0,1\n" + " diag 0,0,0x44\n" + + " j 0b\n" +); + FIXTURE(uc_kvm) { struct kvm_s390_sie_block *sie_block; @@ -275,8 +302,9 @@ static void uc_handle_exit_ucontrol(FIXTURE_DATA(uc_kvm) * self) } /* verify SIEIC exit - * * reset stop requests + * * handle expected interception codes * * fail on codes not expected in the test cases + * Returns if interception is handled / execution can be continued */ static bool uc_handle_sieic(FIXTURE_DATA(uc_kvm) * self) { @@ -293,6 +321,10 @@ static bool uc_handle_sieic(FIXTURE_DATA(uc_kvm) * self) /* end execution in caller on intercepted instruction */ pr_info("sie instruction interception\n"); return false; + case ICPT_KSS: + /* disable KSS and continue; KVM would init the skeys here */ + sie_block->cpuflags &= ~CPUSTAT_KSS; + return true; case ICPT_OPEREXC: /* operation exception */ TEST_FAIL("sie exception on %.4x%.8x", sie_block->ipa, sie_block->ipb); @@ -449,4 +481,59 @@ TEST_F(uc_kvm, uc_gprs) ASSERT_EQ(1, sync_regs->gprs[0]); } +TEST_F(uc_kvm, uc_skey) +{ + u64 test_vaddr = VM_MEM_SIZE - (SZ_1M / 2); + struct kvm_sync_regs *sync_regs = &self->run->s.regs; + struct kvm_run *run = self->run; + u8 skeyvalue = 0x34; + + /* copy test_skey_asm to code_hva / code_gpa */ + TH_LOG("copy code %p to vm mapped memory %p / %p", + &test_skey_asm, (void *)self->code_hva, (void *)self->code_gpa); + memcpy((void *)self->code_hva, &test_skey_asm, PAGE_SIZE); + + /* set register content for test_skey_asm to access not mapped memory */ + sync_regs->gprs[1] = skeyvalue; + sync_regs->gprs[5] = self->base_gpa; + sync_regs->gprs[6] = test_vaddr; + run->kvm_dirty_regs |= KVM_SYNC_GPRS; + + /* DAT disabled + 64 bit mode */ + run->psw_mask = 0x0000000180000000ULL; + run->psw_addr = self->code_gpa; + + ASSERT_EQ(0, uc_run_once(self)); + ASSERT_EQ(false, uc_handle_exit(self)); + ASSERT_EQ(1, sync_regs->gprs[0]); + + /* ISKE */ + ASSERT_EQ(0, uc_run_once(self)); + ASSERT_EQ(false, uc_handle_exit(self)); + ASSERT_EQ(2, sync_regs->gprs[0]); + /* assert initial skey (ACC = 0, R & C = 1) */ + ASSERT_EQ(0x06, sync_regs->gprs[1]); + uc_assert_diag44(self); + + /* SSKE */ + sync_regs->gprs[1] = skeyvalue; + run->kvm_dirty_regs |= KVM_SYNC_GPRS; + ASSERT_EQ(0, uc_run_once(self)); + ASSERT_EQ(false, uc_handle_exit(self)); + ASSERT_EQ(3, sync_regs->gprs[0]); + ASSERT_EQ(skeyvalue, sync_regs->gprs[1]); + uc_assert_diag44(self); + + /* RRBE */ + sync_regs->gprs[1] = skeyvalue; + run->kvm_dirty_regs |= KVM_SYNC_GPRS; + ASSERT_EQ(0, uc_run_once(self)); + ASSERT_EQ(false, uc_handle_exit(self)); + ASSERT_EQ(4, sync_regs->gprs[0]); + /* assert R reset but rest of skey unchanged*/ + ASSERT_EQ(skeyvalue & 0xfa, sync_regs->gprs[1]); + ASSERT_EQ(0x00, sync_regs->gprs[1] & 0x04); + uc_assert_diag44(self); +} + TEST_HARNESS_MAIN