linux-dev/tools/testing/selftests/kvm/s390x, branch linus/master

KVM: s390: selftest: Test suppression indication on key prot exception

2022-05-20T14:38:42Z

Check that suppression is not indicated on injection of a key checked protection exception caused by a memop after it already modified guest memory, as that violates the definition of suppression. Signed-off-by: Janis Schoetterl-Glausch Reviewed-by: Christian Borntraeger Link: https://lore.kernel.org/r/20220512131019.2594948-3-scgl@linux.ibm.com Signed-off-by: Christian Borntraeger Signed-off-by: Janosch Frank

KVM: s390: selftests: Add error memop tests

2022-03-14T15:12:27Z

Test that errors occur if key protection disallows access, including tests for storage and fetch protection override. Perform tests for both logical vcpu and absolute vm ioctls. Also extend the existing tests to the vm ioctl. Signed-off-by: Janis Schoetterl-Glausch Link: https://lore.kernel.org/r/20220308125841.3271721-6-scgl@linux.ibm.com Signed-off-by: Christian Borntraeger

KVM: s390: selftests: Add more copy memop tests

2022-03-14T15:12:27Z

Do not just test the actual copy, but also that success is indicated when using the check only flag. Add copy test with storage key checking enabled, including tests for storage and fetch protection override. These test cover both logical vcpu ioctls as well as absolute vm ioctls. Signed-off-by: Janis Schoetterl-Glausch Link: https://lore.kernel.org/r/20220308125841.3271721-5-scgl@linux.ibm.com Signed-off-by: Christian Borntraeger

KVM: s390: selftests: Add named stages for memop test

2022-03-14T15:12:27Z

The stages synchronize guest and host execution. This helps the reader and constraits the execution of the test -- if the observed staging differs from the expected the test fails. Signed-off-by: Janis Schoetterl-Glausch Link: https://lore.kernel.org/r/20220308125841.3271721-4-scgl@linux.ibm.com Signed-off-by: Christian Borntraeger

KVM: s390: selftests: Add macro as abstraction for MEM_OP

2022-03-14T15:12:27Z

In order to achieve good test coverage we need to be able to invoke the MEM_OP ioctl with all possible parametrizations. However, for a given test, we want to be concise and not specify a long list of default values for parameters not relevant for the test, so the readers attention is not needlessly diverted. Add a macro that enables this and convert the existing test to use it. The macro emulates named arguments and hides some of the ioctl's redundancy, e.g. sets the key flag if an access key is specified. Signed-off-by: Janis Schoetterl-Glausch Link: https://lore.kernel.org/r/20220308125841.3271721-3-scgl@linux.ibm.com Signed-off-by: Christian Borntraeger

KVM: s390: selftests: Split memop tests

2022-03-14T15:12:27Z

Split success case/copy test from error test, making them independent. This means they do not share state and are easier to understand. Also, new test can be added in the same manner without affecting the old ones. In order to make that simpler, introduce functionality for the setup of commonly used variables. Signed-off-by: Janis Schoetterl-Glausch Link: https://lore.kernel.org/r/20220308125841.3271721-2-scgl@linux.ibm.com Signed-off-by: Christian Borntraeger

selftests: kvm: Check whether SIDA memop fails for normal guests

2022-02-15T15:38:12Z

Commit 2c212e1baedc ("KVM: s390: Return error on SIDA memop on normal guest") fixed the behavior of the SIDA memops for normal guests. It would be nice to have a way to test whether the current kernel has the fix applied or not. Thus add a check to the KVM selftests for these two memops. Signed-off-by: Thomas Huth Reviewed-by: Janis Schoetterl-Glausch Reviewed-by: Claudio Imbrenda Reviewed-by: Shuah Khan Link: https://lore.kernel.org/r/20220215074824.188440-1-thuth@redhat.com Signed-off-by: Christian Borntraeger

KVM: s390: selftests: Test TEST PROTECTION emulation

2022-02-14T15:12:57Z

Test the emulation of TEST PROTECTION in the presence of storage keys. Emulation only occurs under certain conditions, one of which is the host page being protected. Trigger this by protecting the test pages via mprotect. Signed-off-by: Janis Schoetterl-Glausch Reviewed-by: Janosch Frank Link: https://lore.kernel.org/r/20220211182215.2730017-5-scgl@linux.ibm.com Signed-off-by: Christian Borntraeger

KVM: selftests: sync_regs test for diag318

2020-12-10T12:36:05Z

The DIAGNOSE 0x0318 instruction, unique to s390x, is a privileged call that must be intercepted via SIE, handled in userspace, and the information set by the instruction is communicated back to KVM. To test the instruction interception, an ad-hoc handler is defined which simply has a VM execute the instruction and then userspace will extract the necessary info. The handler is defined such that the instruction invocation occurs only once. It is up to the caller to determine how the info returned by this handler should be used. The diag318 info is communicated from userspace to KVM via a sync_regs call. This is tested during a sync_regs test, where the diag318 info is requested via the handler, then the info is stored in the appropriate register in KVM via a sync registers call. If KVM does not support diag318, then the tests will print a message stating that diag318 was skipped, and the asserts will simply test against a value of 0. Signed-off-by: Collin Walling Link: https://lore.kernel.org/r/20201207154125.10322-1-walling@linux.ibm.com Acked-by: Janosch Frank Acked-by: Cornelia Huck Reviewed-by: Christian Borntraeger Signed-off-by: Christian Borntraeger

selftests: KVM: s390: check for registers to NOT change on reset

2020-03-16T16:59:09Z

Normal reset and initial CPU reset do not clear all registers. Add a test that those registers are NOT changed. Signed-off-by: Christian Borntraeger Signed-off-by: Paolo Bonzini