* [PATCH 0/1] selftests: kvm: Overlapped memory regions test @ 2020-04-15 20:45 Wainer dos Santos Moschetta 2020-04-15 20:45 ` [PATCH 1/1] selftests: kvm: Add overlapped " Wainer dos Santos Moschetta 0 siblings, 1 reply; 4+ messages in thread From: Wainer dos Santos Moschetta @ 2020-04-15 20:45 UTC (permalink / raw) To: pbonzini, kvm Cc: drjones, sean.j.christopherson, linux-kernel, linux-kselftest, krish.sadhukhan This introduces a test case to check memory slots with overlapped regions on the guest address cannot be added. The cases checked are described in the block comment upon test_overlap_memory_regions() (see the patch 01). I didn't see the need to calcute the addresses on compile/run-time, so I just left them hard-coded (remember: aligned 1M to work on s390x). It works on x86_64, aarch64, and s390x. The patch is based on queue branch. Ah, I did some cosmetic changes on test_add_max_memory_regions() too. If it is not OK to be in a single patch...let me know. Wainer dos Santos Moschetta (1): selftests: kvm: Add overlapped memory regions test .../selftests/kvm/set_memory_region_test.c | 75 ++++++++++++++++++- 1 file changed, 74 insertions(+), 1 deletion(-) -- 2.17.2 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 1/1] selftests: kvm: Add overlapped memory regions test 2020-04-15 20:45 [PATCH 0/1] selftests: kvm: Overlapped memory regions test Wainer dos Santos Moschetta @ 2020-04-15 20:45 ` Wainer dos Santos Moschetta 2020-04-15 23:57 ` Krish Sadhukhan 0 siblings, 1 reply; 4+ messages in thread From: Wainer dos Santos Moschetta @ 2020-04-15 20:45 UTC (permalink / raw) To: pbonzini, kvm Cc: drjones, sean.j.christopherson, linux-kernel, linux-kselftest, krish.sadhukhan Add the test_overlap_memory_regions() test case in set_memory_region_test. This should check that overlapping memory regions on the guest physical address cannot be added. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> --- .../selftests/kvm/set_memory_region_test.c | 75 ++++++++++++++++++- 1 file changed, 74 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c index 260e638826dc..74a987002273 100644 --- a/tools/testing/selftests/kvm/set_memory_region_test.c +++ b/tools/testing/selftests/kvm/set_memory_region_test.c @@ -331,6 +331,8 @@ static void test_add_max_memory_regions(void) uint64_t mem_reg_npages; void *mem; + pr_info("Testing KVM_CAP_NR_MEMSLOTS memory regions can be added\n"); + max_mem_slots = kvm_check_cap(KVM_CAP_NR_MEMSLOTS); TEST_ASSERT(max_mem_slots > 0, "KVM_CAP_NR_MEMSLOTS should be greater than 0"); @@ -338,7 +340,8 @@ static void test_add_max_memory_regions(void) vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); - mem_reg_npages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, MEM_REGION_SIZE); + mem_reg_npages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, + MEM_REGION_SIZE); /* Check it can be added memory slots up to the maximum allowed */ pr_info("Adding slots 0..%i, each memory region with %dK size\n", @@ -365,6 +368,75 @@ static void test_add_max_memory_regions(void) kvm_vm_free(vm); } +/* + * Test it cannot add memory slots with overlapped regions. + * + * The following cases are covered: + * + * 0x100000 0x300000 + * 0x0 0x200000 0x400000 + * slot0 | |---2MB--| (SUCCESS) + * slot1 |---2MB--| (FAIL) + * slot2 |---2MB--| (SUCCESS) + * slot3 |---2MB--| (FAIL) + * slot4 |---2MB--| (FAIL) + * slot5 |---2MB--| (SUCCESS) + */ +void test_overlap_memory_regions(void) +{ + int i; + int ret; + int vm_fd; + struct kvm_userspace_memory_region kvm_region; + struct kvm_vm *vm; + struct slot_t { + uint64_t guest_addr; + int exp_ret; /* Expected ioctl return value */ + }; + struct slot_t slots[] = {{0x200000, 0}, {0x100000, -1}, {0x000000, 0}, + {0x200000, -1}, {0x300000, -1}, {0x400000, 0} + }; + uint64_t mem_reg_npages; + void *mem; + + pr_info("Testing KVM_SET_USER_MEMORY_REGION with overlapped memory regions\n"); + + vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); + vm_fd = vm_get_fd(vm); + + pr_info("Working with memory region of %iMB\n", MEM_REGION_SIZE >> 20); + mem_reg_npages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, + MEM_REGION_SIZE); + + mem = mmap(NULL, MEM_REGION_SIZE, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + TEST_ASSERT(mem != MAP_FAILED, "Failed to mmap() host"); + + kvm_region.flags = 0; + kvm_region.memory_size = MEM_REGION_SIZE; + kvm_region.userspace_addr = (uint64_t) mem; + + for (i = 0; i < sizeof(slots)/sizeof(struct slot_t); i++) { + pr_info("Add slot %i, guest address 0x%06lx, expect rc=%i\n", + i, slots[i].guest_addr, slots[i].exp_ret); + if (slots[i].exp_ret == 0) { + vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, + slots[i].guest_addr, i, + mem_reg_npages, 0); + } else { + kvm_region.slot = i; + kvm_region.guest_phys_addr = slots[i].guest_addr; + ret = ioctl(vm_fd, KVM_SET_USER_MEMORY_REGION, + &kvm_region); + TEST_ASSERT(ret == -1 && errno == EEXIST, + "Adding overlapped memory region should fail with EEXIT"); + } + } + + munmap(mem, MEM_REGION_SIZE); + kvm_vm_free(vm); +} + int main(int argc, char *argv[]) { #ifdef __x86_64__ @@ -383,6 +455,7 @@ int main(int argc, char *argv[]) #endif test_add_max_memory_regions(); + test_overlap_memory_regions(); #ifdef __x86_64__ if (argc > 1) -- 2.17.2 ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 1/1] selftests: kvm: Add overlapped memory regions test 2020-04-15 20:45 ` [PATCH 1/1] selftests: kvm: Add overlapped " Wainer dos Santos Moschetta @ 2020-04-15 23:57 ` Krish Sadhukhan 2020-04-16 13:53 ` Paolo Bonzini 0 siblings, 1 reply; 4+ messages in thread From: Krish Sadhukhan @ 2020-04-15 23:57 UTC (permalink / raw) To: Wainer dos Santos Moschetta, pbonzini, kvm Cc: drjones, sean.j.christopherson, linux-kernel, linux-kselftest On 4/15/20 1:45 PM, Wainer dos Santos Moschetta wrote: > Add the test_overlap_memory_regions() test case in > set_memory_region_test. This should check that overlapping > memory regions on the guest physical address cannot be added. I think the commit header and the body need some improvement. For example, Header: Test that overlapping guest memory regions can not be added Body: Enhance the existing tests in set_memory_region_test.c so that it tests overlapping guest memory regions. The new test verifies that adding overlapping guest memory regions fails. > > Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> > --- > .../selftests/kvm/set_memory_region_test.c | 75 ++++++++++++++++++- > 1 file changed, 74 insertions(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c > index 260e638826dc..74a987002273 100644 > --- a/tools/testing/selftests/kvm/set_memory_region_test.c > +++ b/tools/testing/selftests/kvm/set_memory_region_test.c > @@ -331,6 +331,8 @@ static void test_add_max_memory_regions(void) > uint64_t mem_reg_npages; > void *mem; > > + pr_info("Testing KVM_CAP_NR_MEMSLOTS memory regions can be added\n"); > + > max_mem_slots = kvm_check_cap(KVM_CAP_NR_MEMSLOTS); > TEST_ASSERT(max_mem_slots > 0, > "KVM_CAP_NR_MEMSLOTS should be greater than 0"); > @@ -338,7 +340,8 @@ static void test_add_max_memory_regions(void) > > vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); > > - mem_reg_npages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, MEM_REGION_SIZE); > + mem_reg_npages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, > + MEM_REGION_SIZE); > > /* Check it can be added memory slots up to the maximum allowed */ > pr_info("Adding slots 0..%i, each memory region with %dK size\n", > @@ -365,6 +368,75 @@ static void test_add_max_memory_regions(void) > kvm_vm_free(vm); > } > > +/* > + * Test it cannot add memory slots with overlapped regions. "Test that we can not add memory slots with overlapping regions." > + * > + * The following cases are covered: > + * > + * 0x100000 0x300000 > + * 0x0 0x200000 0x400000 > + * slot0 | |---2MB--| (SUCCESS) > + * slot1 |---2MB--| (FAIL) > + * slot2 |---2MB--| (SUCCESS) > + * slot3 |---2MB--| (FAIL) > + * slot4 |---2MB--| (FAIL) > + * slot5 |---2MB--| (SUCCESS) > + */ > +void test_overlap_memory_regions(void) > +{ > + int i; > + int ret; > + int vm_fd; > + struct kvm_userspace_memory_region kvm_region; > + struct kvm_vm *vm; > + struct slot_t { > + uint64_t guest_addr; > + int exp_ret; /* Expected ioctl return value */ > + }; > + struct slot_t slots[] = {{0x200000, 0}, {0x100000, -1}, {0x000000, 0}, > + {0x200000, -1}, {0x300000, -1}, {0x400000, 0} > + }; > + uint64_t mem_reg_npages; > + void *mem; > + > + pr_info("Testing KVM_SET_USER_MEMORY_REGION with overlapped memory regions\n"); > + > + vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR); > + vm_fd = vm_get_fd(vm); > + > + pr_info("Working with memory region of %iMB\n", MEM_REGION_SIZE >> 20); > + mem_reg_npages = vm_calc_num_guest_pages(VM_MODE_DEFAULT, > + MEM_REGION_SIZE); > + > + mem = mmap(NULL, MEM_REGION_SIZE, PROT_READ | PROT_WRITE, > + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); > + TEST_ASSERT(mem != MAP_FAILED, "Failed to mmap() host"); I think a better message would be: "mmap() failure in host". > + > + kvm_region.flags = 0; > + kvm_region.memory_size = MEM_REGION_SIZE; > + kvm_region.userspace_addr = (uint64_t) mem; > + > + for (i = 0; i < sizeof(slots)/sizeof(struct slot_t); i++) { > + pr_info("Add slot %i, guest address 0x%06lx, expect rc=%i\n", > + i, slots[i].guest_addr, slots[i].exp_ret); > + if (slots[i].exp_ret == 0) { > + vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, > + slots[i].guest_addr, i, > + mem_reg_npages, 0); > + } else { > + kvm_region.slot = i; > + kvm_region.guest_phys_addr = slots[i].guest_addr; > + ret = ioctl(vm_fd, KVM_SET_USER_MEMORY_REGION, > + &kvm_region); > + TEST_ASSERT(ret == -1 && errno == EEXIST, > + "Adding overlapped memory region should fail with EEXIT"); > + } > + } > + > + munmap(mem, MEM_REGION_SIZE); > + kvm_vm_free(vm); > +} > + > int main(int argc, char *argv[]) > { > #ifdef __x86_64__ > @@ -383,6 +455,7 @@ int main(int argc, char *argv[]) > #endif > > test_add_max_memory_regions(); > + test_overlap_memory_regions(); > > #ifdef __x86_64__ > if (argc > 1) Other than the comments above, Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com> ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 1/1] selftests: kvm: Add overlapped memory regions test 2020-04-15 23:57 ` Krish Sadhukhan @ 2020-04-16 13:53 ` Paolo Bonzini 0 siblings, 0 replies; 4+ messages in thread From: Paolo Bonzini @ 2020-04-16 13:53 UTC (permalink / raw) To: Krish Sadhukhan, Wainer dos Santos Moschetta, kvm Cc: drjones, sean.j.christopherson, linux-kernel, linux-kselftest On 16/04/20 01:57, Krish Sadhukhan wrote: > >> Add the test_overlap_memory_regions() test case in >> set_memory_region_test. This should check that overlapping >> memory regions on the guest physical address cannot be added. > > > I think the commit header and the body need some improvement. For example, > > Header: Test that overlapping guest memory regions can not be added > > Body: Enhance the existing tests in set_memory_region_test.c so > that it tests overlapping guest > > memory regions. The new test verifies that adding > overlapping guest memory regions fails. I like Wainer's header and your body. :) Paolo ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-04-16 13:53 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-04-15 20:45 [PATCH 0/1] selftests: kvm: Overlapped memory regions test Wainer dos Santos Moschetta 2020-04-15 20:45 ` [PATCH 1/1] selftests: kvm: Add overlapped " Wainer dos Santos Moschetta 2020-04-15 23:57 ` Krish Sadhukhan 2020-04-16 13:53 ` Paolo Bonzini
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