From patchwork Wed Aug 7 15:45:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Schlameuss X-Patchwork-Id: 817539 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 C19BB137776; Wed, 7 Aug 2024 15:45:53 +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=1723045555; cv=none; b=mEw6HbN6HmXQ7mpGdBsDLSUm8cHfKNII0xh1DHlR8xrrKaVD8M274R7seXm37joSlZpk1kaeL7q/+U1CC0OlwpExLDeg1SheQSKPOJhQKqWEBPo/LtE12Uc32qJZs8F0rd+r+a500S5mM8lDJP8iYUTmpXp5f3yZBAa8WW8E4+4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723045555; c=relaxed/simple; bh=T1kF1uOirxCjQ2XAXC6x4v8xlxpjMc75fizthynwObY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ArKhcFDc9Ffohg7rau/1snPzPYLRPAbO1vtcPfRjaZah1XbHC2qhIR/ntOY+aL9PQcj0k9phe5mOxLscRhrwSxHP9aha2piyzzcofc0kVVnJv8Tv77rREfgk+IwXbGsz5QP3rjFvd3U+k5QWsP58WBZm7hsdn6CqMQnIKzaqDGc= 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=fR15bwJ1; 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="fR15bwJ1" Received: from pps.filterd (m0353728.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4772PBPa014927; Wed, 7 Aug 2024 15:45:45 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=p3xnx03PMlEYj wtSEbfgqyrIOdWLHprQ9BZuK16I3PQ=; b=fR15bwJ1flR2/SA/YGmQsBCAI6tjf 7dd/Q2WLfV07dsyIUqG+eswHr4IDhGRJwYBFcz/nilx3it+jmmr8UJRNwdmVcznK VP+UB9uDOieMJHtajpgWPw1/L9/rxRJbgvds8Cf5x26Ra7JHy3HsZklzJdrmRO9J 5mqEZWXHrfhq0M4Xg9HiwZJdRhvAQ2GAC9zthKXjdIaz4glefi4Kfwc1raPjcxS/ Wiy/rEGNI81ClcnK2GGXp94OcZDX+MhrNqiiuipAjgI05a+z7nMN3o2EOAfv2hQi uUJnsfyOtFVCxX9HyaWpUCFLVW6HIXU1HEZcb8gd8JECAzEBd9ndRupQg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 40unmk2xym-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Aug 2024 15:45:45 +0000 (GMT) Received: from m0353728.ppops.net (m0353728.ppops.net [127.0.0.1]) by pps.reinject (8.18.0.8/8.18.0.8) with ESMTP id 477Fjidw015141; Wed, 7 Aug 2024 15:45:44 GMT Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 40unmk2xye-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Aug 2024 15:45:44 +0000 (GMT) Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 477FJDfd024101; Wed, 7 Aug 2024 15:45:43 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 40syvphqmq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Aug 2024 15:45:43 +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 477FjbGU54788580 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 7 Aug 2024 15:45:39 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AB5E920065; Wed, 7 Aug 2024 15:45:37 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 62B5F20067; Wed, 7 Aug 2024 15:45:37 +0000 (GMT) Received: from darkmoore.boeblingen.de.ibm.com (unknown [9.155.210.150]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 7 Aug 2024 15:45:37 +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 v5 07/10] selftests: kvm: s390: Add uc_map_unmap VM test case Date: Wed, 7 Aug 2024 17:45:09 +0200 Message-ID: <20240807154512.316936-8-schlameuss@linux.ibm.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240807154512.316936-1-schlameuss@linux.ibm.com> References: <20240807154512.316936-1-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-ORIG-GUID: 7xS9gIfKhOVkpanvl1uJiBNrz3RFBd9Q X-Proofpoint-GUID: kydlbp2cLEKEd80lh7koAkP6hFAl7U0P 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=2024-08-07_11,2024-08-07_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=999 impostorscore=0 spamscore=0 mlxscore=0 adultscore=0 clxscore=1015 phishscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408070107 Add a test case verifying basic running and interaction of ucontrol VMs. Fill the segment and page tables for allocated memory and map memory on first access. * uc_map_unmap Store and load data to mapped and unmapped memory and use pic segment translation handling to map memory on access. Signed-off-by: Christoph Schlameuss --- .../selftests/kvm/s390x/ucontrol_test.c | 167 +++++++++++++++++- 1 file changed, 166 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c b/tools/testing/selftests/kvm/s390x/ucontrol_test.c index 030c59010fe1..8b978064e753 100644 --- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c +++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c @@ -16,7 +16,12 @@ #include #include +#define PGM_SEGMENT_TRANSLATION 0x10 + #define VM_MEM_SIZE (4 * SZ_1M) +#define VM_MEM_EXT_SIZE (2 * SZ_1M) +#define VM_MEM_MAX_M ((VM_MEM_SIZE + VM_MEM_EXT_SIZE) / SZ_1M) +#define VM_MEM_TABLE_SIZE (4 * PAGE_SIZE) /* so directly declare capget to check caps without libcap */ int capget(cap_user_header_t header, cap_user_data_t data); @@ -58,6 +63,23 @@ asm("test_gprs_asm:\n" " j 0b\n" ); +/* Test program manipulating memory */ +extern char test_mem_asm[]; +asm("test_mem_asm:\n" + "xgr %r0, %r0\n" + + "0:\n" + " ahi %r0,1\n" + " st %r1,0(%r5,%r6)\n" + + " xgr %r1, %r1\n" + " l %r1,0(%r5,%r6)\n" + " ahi %r0,1\n" + " diag 0,0,0x44\n" + + " j 0b\n" +); + FIXTURE(uc_kvm) { struct kvm_s390_sie_block *sie_block; @@ -67,6 +89,7 @@ FIXTURE(uc_kvm) uintptr_t base_hva; uintptr_t code_hva; int kvm_run_size; + vm_paddr_t pgd; void *vm_mem; int vcpu_fd; int kvm_fd; @@ -116,7 +139,7 @@ FIXTURE_SETUP(uc_kvm) self->base_gpa = 0; self->code_gpa = self->base_gpa + (3 * SZ_1M); - self->vm_mem = aligned_alloc(SZ_1M, VM_MEM_SIZE); + self->vm_mem = aligned_alloc(SZ_1M, VM_MEM_MAX_M * SZ_1M); ASSERT_NE(NULL, self->vm_mem) TH_LOG("malloc failed %u", errno); self->base_hva = (uintptr_t)self->vm_mem; self->code_hva = self->base_hva - self->base_gpa + self->code_gpa; @@ -222,6 +245,80 @@ TEST(uc_cap_hpage) close(kvm_fd); } +/* calculate host virtual addr from guest physical addr */ +static void *gpa2hva(FIXTURE_DATA(uc_kvm) * self, u64 gpa) +{ + return (void *)(self->base_hva - self->base_gpa + gpa); +} + +/* initialize segment and page tables for uc_kvm tests */ +static void init_st_pt(FIXTURE_DATA(uc_kvm) * self) +{ + struct kvm_sync_regs *sync_regs = &self->run->s.regs; + u64 first_pt_addr, ste, s_addr, pte; + struct kvm_run *run = self->run; + void *se_addr; + int si, pi; + u64 *phd; + + /* set PASCE addr */ + self->pgd = self->base_gpa + SZ_1M; + phd = gpa2hva(self, self->pgd); + memset(phd, 0xff, VM_MEM_TABLE_SIZE); + + first_pt_addr = self->pgd + (VM_MEM_TABLE_SIZE * VM_MEM_MAX_M); + /* for each segment in the VM */ + for (si = 0; si < VM_MEM_MAX_M; si++) { + /* build segment table entry (ste) */ + ste = (first_pt_addr + (VM_MEM_TABLE_SIZE * si)) & ~0x7fful; + /* store ste in st */ + phd[si] = ste; + + se_addr = gpa2hva(self, phd[si]); + s_addr = self->base_gpa + (si * SZ_1M); + memset(se_addr, 0xff, VM_MEM_TABLE_SIZE); + /* for each page in the segment (VM) */ + for (pi = 0; pi < (SZ_1M / PAGE_SIZE); pi++) { + /* build page table entry (pte) */ + pte = (s_addr + (pi * PAGE_SIZE)) & ~0xffful; + /* store pte in pt */ + ((u64 *)se_addr)[pi] = pte; + } + } + pr_debug("segment table entry %p (0x%lx) --> %p\n", + phd, phd[0], gpa2hva(self, (phd[0] & ~0x7fful))); + print_hex_bytes("st", (u64)phd, 64); + print_hex_bytes("pt", (u64)gpa2hva(self, phd[0]), 128); + + /* PASCE TT=00 for segment table */ + sync_regs->crs[1] = self->pgd | 0x3; + run->kvm_dirty_regs |= KVM_SYNC_CRS; +} + +static void uc_handle_exit_ucontrol(FIXTURE_DATA(uc_kvm) * self) +{ + struct kvm_run *run = self->run; + + TEST_ASSERT_EQ(KVM_EXIT_S390_UCONTROL, run->exit_reason); + switch (run->s390_ucontrol.pgm_code) { + case PGM_SEGMENT_TRANSLATION: + pr_info("ucontrol pic segment translation 0x%llx\n", + run->s390_ucontrol.trans_exc_code); + /* map / make additional memory available */ + struct kvm_s390_ucas_mapping map2 = { + .user_addr = (u64)gpa2hva(self, run->s390_ucontrol.trans_exc_code), + .vcpu_addr = run->s390_ucontrol.trans_exc_code, + .length = VM_MEM_EXT_SIZE, + }; + pr_info("ucas map %p %p 0x%llx\n", + (void *)map2.user_addr, (void *)map2.vcpu_addr, map2.length); + TEST_ASSERT_EQ(0, ioctl(self->vcpu_fd, KVM_S390_UCAS_MAP, &map2)); + break; + default: + TEST_FAIL("UNEXPECTED PGM CODE %d", run->s390_ucontrol.pgm_code); + } +} + /* verify SIEIC exit * * reset stop requests * * fail on codes not expected in the test cases @@ -256,6 +353,12 @@ static bool uc_handle_exit(FIXTURE_DATA(uc_kvm) * self) struct kvm_run *run = self->run; switch (run->exit_reason) { + case KVM_EXIT_S390_UCONTROL: + /** check program interruption code + * handle page fault --> ucas map + */ + uc_handle_exit_ucontrol(self); + break; case KVM_EXIT_S390_SIEIC: return uc_handle_sieic(self); default: @@ -287,6 +390,68 @@ static void uc_assert_diag44(FIXTURE_DATA(uc_kvm) * self) TEST_ASSERT_EQ(0x440000, sie_block->ipb); } +TEST_F(uc_kvm, uc_map_unmap) +{ + struct kvm_sync_regs *sync_regs = &self->run->s.regs; + struct kvm_run *run = self->run; + int rc; + + init_st_pt(self); + + /* copy test_mem_asm to code_hva / code_gpa */ + TH_LOG("copy code %p to vm mapped memory %p / %p", + &test_mem_asm, (void *)self->code_hva, (void *)self->code_gpa); + memcpy((void *)self->code_hva, &test_mem_asm, PAGE_SIZE); + + /* DAT enabled + 64 bit mode */ + run->psw_mask = 0x0400000180000000ULL; + run->psw_addr = self->code_gpa; + + /* set register content for test_mem_asm to access not mapped memory*/ + sync_regs->gprs[1] = 0x55; + sync_regs->gprs[5] = self->base_gpa; + sync_regs->gprs[6] = VM_MEM_SIZE; + run->kvm_dirty_regs |= KVM_SYNC_GPRS; + + /* run and expect to fail witch ucontrol pic segment translation */ + ASSERT_EQ(0, uc_run_once(self)); + ASSERT_EQ(1, sync_regs->gprs[0]); + ASSERT_EQ(KVM_EXIT_S390_UCONTROL, run->exit_reason); + + ASSERT_EQ(PGM_SEGMENT_TRANSLATION, run->s390_ucontrol.pgm_code); + ASSERT_EQ(self->base_gpa + VM_MEM_SIZE, run->s390_ucontrol.trans_exc_code); + /* map / make additional memory available */ + struct kvm_s390_ucas_mapping map2 = { + .user_addr = (u64)gpa2hva(self, self->base_gpa + VM_MEM_SIZE), + .vcpu_addr = self->base_gpa + VM_MEM_SIZE, + .length = VM_MEM_EXT_SIZE, + }; + TH_LOG("ucas map %p %p 0x%llx", + (void *)map2.user_addr, (void *)map2.vcpu_addr, map2.length); + rc = ioctl(self->vcpu_fd, KVM_S390_UCAS_MAP, &map2); + ASSERT_EQ(0, rc) + TH_LOG("ucas map result %d not expected, %s", rc, strerror(errno)); + ASSERT_EQ(0, uc_run_once(self)); + ASSERT_EQ(false, uc_handle_exit(self)); + uc_assert_diag44(self); + + /* assert registers and memory are in expected state */ + ASSERT_EQ(2, sync_regs->gprs[0]); + ASSERT_EQ(0x55, sync_regs->gprs[1]); + ASSERT_EQ(0x55, *(u32 *)gpa2hva(self, self->base_gpa + VM_MEM_SIZE)); + + /* unmap and run loop again */ + TH_LOG("ucas unmap %p %p 0x%llx", + (void *)map2.user_addr, (void *)map2.vcpu_addr, map2.length); + rc = ioctl(self->vcpu_fd, KVM_S390_UCAS_UNMAP, &map2); + ASSERT_EQ(0, rc) + TH_LOG("ucas map result %d not expected, %s", rc, strerror(errno)); + ASSERT_EQ(0, uc_run_once(self)); + ASSERT_EQ(3, sync_regs->gprs[0]); + ASSERT_EQ(KVM_EXIT_S390_UCONTROL, run->exit_reason); + ASSERT_EQ(true, uc_handle_exit(self)); +} + TEST_F(uc_kvm, uc_gprs) { struct kvm_sync_regs *sync_regs = &self->run->s.regs;