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Thu, 15 Aug 2024 15:45:33 +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 2/3] selftests: kvm: s390: Add uc_skey VM test case Date: Thu, 15 Aug 2024 17:45:28 +0200 Message-ID: <20240815154529.628087-3-schlameuss@linux.ibm.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240815154529.628087-1-schlameuss@linux.ibm.com> References: <20240815154529.628087-1-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: 0oEvUGWNLoIY2-32YwGyFsP1nhsho6qt X-Proofpoint-ORIG-GUID: -iIE4ZwptEimLZtd7XS18RpGHpM4Nw8s 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=2024-08-15_08,2024-08-15_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=914 phishscore=0 spamscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 adultscore=0 bulkscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408150113 Add a test case manipulating s390 storage keys from within the ucontrol VM. Signed-off-by: Christoph Schlameuss --- .../selftests/kvm/s390x/ucontrol_test.c | 76 +++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c b/tools/testing/selftests/kvm/s390x/ucontrol_test.c index 41306bb52f29..5f8815a80544 100644 --- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c +++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c @@ -79,6 +79,32 @@ 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" + " 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; @@ -345,6 +371,56 @@ static void uc_assert_diag44(FIXTURE_DATA(uc_kvm) * self) TEST_ASSERT_EQ(0x440000, sie_block->ipb); } +TEST_F(uc_kvm, uc_skey) +{ + u64 test_vaddr = self->base_gpa + 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; + + self->sie_block->ictl |= ICTL_OPEREXC | ICTL_PINT; + self->sie_block->cpuflags &= ~CPUSTAT_KSS; + /* 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(2, sync_regs->gprs[0]); + /* assert initial skey (ACC = 0, R & C = 1) */ + ASSERT_EQ(0x06, sync_regs->gprs[1]); + uc_assert_diag44(self); + + 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); + + 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_F(uc_kvm, uc_map_unmap) { struct kvm_sync_regs *sync_regs = &self->run->s.regs;