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2018-08-22kvm: selftest: pass in extra memory when create vmPeter Xu7-8/+23
This information can be used to decide the size of the default memory slot, which will need to cover the extra pages with page tables. Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-22kvm: selftest: include the tools headersPeter Xu3-3/+3
Let the kvm selftest include the tools headers, then we can start to use things there like bitmap operations. Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-22kvm: selftest: unify the guest port macrosPeter Xu6-95/+78
Most of the tests are using the same way to do guest to host sync but the code is mostly duplicated. Generalize the guest port macros into the common header file and use it in different tests. Meanwhile provide "struct guest_args" and a helper "guest_args_read()" to hide the register details when playing with these port operations on RDI and RSI. Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-06KVM: selftests: add tests for shadow VMCS save/restorePaolo Bonzini3-5/+74
This includes setting up the shadow VMCS and the secondary execution controls in lib/vmx.c. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-06kvm: selftests: add test for nested state save/restorePaolo Bonzini3-1/+132
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-06kvm: selftests: add basic test for state save and restorePaolo Bonzini8-22/+311
The test calls KVM_RUN repeatedly, and creates an entirely new VM with the old memory and vCPU state on every exit to userspace. The kvm_util API is expanded with two functions that manage the lifetime of a kvm_vm struct: the first closes the file descriptors and leaves the memory allocated, and the second opens the file descriptors and reuses the memory from the previous incarnation of the kvm_vm struct. For now the test is very basic, as it does not test for example XSAVE or vCPU events. However, it will test nested virtualization state starting with the next patch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-06kvm: selftests: ensure vcpu file is releasedPaolo Bonzini1-1/+9
The selftests were not munmap-ing the kvm_run area from the vcpu file descriptor. The result was that kvm_vcpu_release was not called and a reference was left in the parent "struct kvm". Ultimately this was visible in the upcoming state save/restore test as an error when KVM attempted to create a duplicate debugfs entry. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-06kvm: selftests: actually use all of lib/vmx.cPaolo Bonzini3-89/+72
The allocation of the VMXON and VMCS is currently done twice, in lib/vmx.c and in vmx_tsc_adjust_test.c. Reorganize the code to provide a cleaner and easier to use API to the tests. lib/vmx.c now does the complete setup of the VMX data structures, but does not create the VM or set CPUID. This has to be done by the caller. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-06kvm: selftests: create a GDT and TSSPaolo Bonzini5-47/+79
The GDT and the TSS base were left to zero, and this has interesting effects when the TSS descriptor is later read to set up a VMCS's TR_BASE. Basically it worked by chance, and this patch fixes it by setting up all the protected mode data structures properly. Because the GDT and TSS addresses are virtual, the page tables now always exist at the time of vcpu setup. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-08-06kvm: selftests: add cr4_cpuid_sync_testWei Huang3-0/+131
KVM is supposed to update some guest VM's CPUID bits (e.g. OSXSAVE) when CR4 is changed. A bug was found in KVM recently and it was fixed by Commit c4d2188206ba ("KVM: x86: Update cpuid properly when CR4.OSXAVE or CR4.PKE is changed"). This patch adds a test to verify the synchronization between guest VM's CR4 and CPUID bits. Signed-off-by: Wei Huang <wei@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-05-30selftests: kvm: return Kselftest Skip code for skipped testsShuah Khan (Samsung OSG)2-2/+9
When kvm test is skipped because of unmet dependencies and/or unsupported configuration, it exits with error which is treated as a fail by the Kselftest framework. This leads to false negative result even when the test could not be run. Change it to return kselftest skip code when a test gets skipped to clearly report that the test could not be run. Change it to use ksft_exit_skip() when the test is skipped. In addition, refine test_assert() message to include strerror() string and add explicit check for EACCES to cleary identify when test doesn't run when access is denied to resources required e.g: open /dev/kvm failed, rc: -1 errno: 13 Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-30selftests: kvm: update .gitignore with missing fileAnders Roxell1-0/+1
Fixes: d5edb7f8e7ab ("kvm: selftests: add vmx_tsc_adjust_test") Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-30selftests: kvm: add .gitignore for generated filesAnders Roxell1-0/+2
Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-11KVM: selftests: exit with 0 status code when tests cannot be runPaolo Bonzini5-20/+43
Right now, skipped tests are returning a failure exit code if /dev/kvm does not exists. Consistently return a zero status code so that various scripts over the interwebs do not complain. Also return a zero status code if the KVM_CAP_SYNC_REGS capability is not present, and hardcode in the test the register kinds that are covered (rather than just using whatever value of KVM_SYNC_X86_VALID_FIELDS is provided by the kernel headers). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-16kvm: selftests: add vmx_tsc_adjust_testPaolo Bonzini6-13/+991
The test checks the behavior of setting MSR_IA32_TSC in a nested guest, and the TSC_OFFSET VMCS field in general. It also introduces the testing infrastructure for Intel nested virtualization. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-12kvm: selftests: add -std=gnu99 cflagsPeng Hao1-1/+1
lib/kvm_util.c: In function ‘kvm_memcmp_hva_gva’: lib/kvm_util.c:332:2: error: ‘for’ loop initial declarations are only allowed in C99 mode So add -std=gnu99 to CFLAGS Signed-off-by: Peng Hao <peng.hao2@zte.com.cn> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-10kvm: selftests: fix spelling mistake: "divisable" and "divisible"Colin Ian King2-3/+3
Trivial fix to spelling mistakes in comment and message text Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-04kvm: selftests: add sync_regs_testPaolo Bonzini6-1/+595
This includes the infrastructure to map the test into the guest and run code from the test program inside a VM. Signed-off-by: Ken Hofsass <hofsass@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-04kvm: selftests: add API testing infrastructurePaolo Bonzini11-0/+5812
Testsuite contributed by Google and cleaned up by myself for inclusion in Linux. Signed-off-by: Ken Hofsass <hofsass@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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