| Message ID | 20240902115002.199331-3-schlameuss@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | selftests: kvm: s390: Add ucontrol memory selftests | expand |
On Mon, 2 Sep 2024 13:50:01 +0200 Christoph Schlameuss <schlameuss@linux.ibm.com> wrote: > Add a test case manipulating s390 storage keys from within the ucontrol > VM. > > Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com> > --- > .../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)); this should be true, since KSS will be triggered > + 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
On Thu Sep 12, 2024 at 10:15 AM CEST, Claudio Imbrenda wrote: > On Mon, 2 Sep 2024 13:50:01 +0200 > Christoph Schlameuss <schlameuss@linux.ibm.com> wrote: > > > Add a test case manipulating s390 storage keys from within the ucontrol > > VM. > > > > Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com> > > --- > > .../selftests/kvm/s390x/ucontrol_test.c | 89 ++++++++++++++++++- > > 1 file changed, 88 insertions(+), 1 deletion(-) [...] > > +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)); > > this should be true, since KSS will be triggered > Good find. Yes, as this is the assertion does actually fail here. Will fix that in the next version. > > + 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); [...]
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
Add a test case manipulating s390 storage keys from within the ucontrol VM. Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com> --- .../selftests/kvm/s390x/ucontrol_test.c | 89 ++++++++++++++++++- 1 file changed, 88 insertions(+), 1 deletion(-)