diff options
author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-04-10 16:17:03 -0700 |
---|---|---|
committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-15 12:08:44 -0400 |
commit | 8fb38f05ca9ffcca895d545a68a02f9a312c30d5 (patch) | |
tree | 1878da4081f7f52dd9dfe947fcbf98697cb64229 /tools/testing/selftests | |
parent | 8a0639fe9201ed7af73dd40fc4b6f9a4f7b16a42 (diff) |
KVM: selftests: Add "delete" testcase to set_memory_region_test
Add a testcase for deleting memslots while the guest is running.
Like the "move" testcase, this is x86_64-only as it relies on MMIO
happening when a non-existent memslot is encountered.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200410231707.7128-7-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests')
-rw-r--r-- | tools/testing/selftests/kvm/x86_64/set_memory_region_test.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c b/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c index 629dd8579b73..b556024af683 100644 --- a/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c +++ b/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c @@ -29,6 +29,9 @@ static const uint64_t MMIO_VAL = 0xbeefull; +extern const uint64_t final_rip_start; +extern const uint64_t final_rip_end; + static sem_t vcpu_ready; static inline uint64_t guest_spin_on_val(uint64_t spin_val) @@ -203,6 +206,89 @@ static void test_move_memory_region(void) kvm_vm_free(vm); } +static void guest_code_delete_memory_region(void) +{ + uint64_t val; + + GUEST_SYNC(0); + + /* Spin until the memory region is deleted. */ + val = guest_spin_on_val(0); + GUEST_ASSERT_1(val == MMIO_VAL, val); + + /* Spin until the memory region is recreated. */ + val = guest_spin_on_val(MMIO_VAL); + GUEST_ASSERT_1(val == 0, val); + + /* Spin until the memory region is deleted. */ + val = guest_spin_on_val(0); + GUEST_ASSERT_1(val == MMIO_VAL, val); + + asm("1:\n\t" + ".pushsection .rodata\n\t" + ".global final_rip_start\n\t" + "final_rip_start: .quad 1b\n\t" + ".popsection"); + + /* Spin indefinitely (until the code memslot is deleted). */ + guest_spin_on_val(MMIO_VAL); + + asm("1:\n\t" + ".pushsection .rodata\n\t" + ".global final_rip_end\n\t" + "final_rip_end: .quad 1b\n\t" + ".popsection"); + + GUEST_ASSERT_1(0, 0); +} + +static void test_delete_memory_region(void) +{ + pthread_t vcpu_thread; + struct kvm_regs regs; + struct kvm_run *run; + struct kvm_vm *vm; + + vm = spawn_vm(&vcpu_thread, guest_code_delete_memory_region); + + /* Delete the memory region, the guest should not die. */ + vm_mem_region_delete(vm, MEM_REGION_SLOT); + wait_for_vcpu(); + + /* Recreate the memory region. The guest should see "0". */ + vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS_THP, + MEM_REGION_GPA, MEM_REGION_SLOT, + MEM_REGION_SIZE / getpagesize(), 0); + wait_for_vcpu(); + + /* Delete the region again so that there's only one memslot left. */ + vm_mem_region_delete(vm, MEM_REGION_SLOT); + wait_for_vcpu(); + + /* + * Delete the primary memslot. This should cause an emulation error or + * shutdown due to the page tables getting nuked. + */ + vm_mem_region_delete(vm, 0); + + pthread_join(vcpu_thread, NULL); + + run = vcpu_state(vm, VCPU_ID); + + TEST_ASSERT(run->exit_reason == KVM_EXIT_SHUTDOWN || + run->exit_reason == KVM_EXIT_INTERNAL_ERROR, + "Unexpected exit reason = %d", run->exit_reason); + + vcpu_regs_get(vm, VCPU_ID, ®s); + + TEST_ASSERT(regs.rip >= final_rip_start && + regs.rip < final_rip_end, + "Bad rip, expected 0x%lx - 0x%lx, got 0x%llx\n", + final_rip_start, final_rip_end, regs.rip); + + kvm_vm_free(vm); +} + int main(int argc, char *argv[]) { int i, loops; @@ -215,8 +301,13 @@ int main(int argc, char *argv[]) else loops = 10; + pr_info("Testing MOVE of in-use region, %d loops\n", loops); for (i = 0; i < loops; i++) test_move_memory_region(); + pr_info("Testing DELETE of in-use region, %d loops\n", loops); + for (i = 0; i < loops; i++) + test_delete_memory_region(); + return 0; } |