Re: [PATCH 09/10] KVM: selftests: Make set_memory_region_test common to all architectures

[Wainer dos Santos Moschetta <wainersm@redhat.com>]

Hi Sean,

On 4/10/20 8:17 PM, Sean Christopherson wrote:
> Make set_memory_region_test available on all architectures by wrapping
> the bits that are x86-specific in ifdefs.  All architectures can do
> no-harm testing of running with zero memslots, and a future testcase
> to create the maximum number of memslots will also be architecture
> agnostic.

I got this series successfully compiled in aarch64 and s390x. However 
the zero memslot test fails on both arches on vcpu_run().

The machines I borrowed got RHEL-8.1.0 installed (kernel 4.18.0-147). 
Perhaps I am using a too old kernel? Anyway, trying to get at least an 
aarch64 box with newer kernel to double check.

The error on aarch64:

Testing KVM_RUN with zero added memory regions
==== Test Assertion Failure ====
   lib/kvm_util.c:1179: ret == 0
   pid=83625 tid=83625 - Exec format error
      1    0x000000000040114f: test_zero_memory_regions at 
set_memory_region_test.c:313
      2     (inlined by) main at set_memory_region_test.c:383
      3    0x0000ffff92e70d63: ?? ??:0
      4    0x0000000000401367: _start at :?
   KVM_RUN IOCTL failed, rc: -1 errno: 8

And on s390x:

Testing KVM_RUN with zero added memory regions
==== Test Assertion Failure ====
   lib/kvm_util.c:1179: ret == 0
   pid=41263 tid=-1 - Invalid argument
      1    0x00000000010029b5: vcpu_run at kvm_util.c:1178
      2    0x0000000001001563: test_zero_memory_regions at 
set_memory_region_test.c:313
      3     (inlined by) main at set_memory_region_test.c:383
      4    0x000003ffb80a3611: ?? ??:0
      5    0x00000000010017bd: .annobin_init.c.hot at crt1.o:?
      6    0xffffffffffffffff: ?? ??:0
   KVM_RUN IOCTL failed, rc: -1 errno: 14

Thanks,

Wainer

>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> ---
>   tools/testing/selftests/kvm/.gitignore              |  2 +-
>   tools/testing/selftests/kvm/Makefile                |  4 +++-
>   .../kvm/{x86_64 => }/set_memory_region_test.c       | 13 ++++++++++++-
>   3 files changed, 16 insertions(+), 3 deletions(-)
>   rename tools/testing/selftests/kvm/{x86_64 => }/set_memory_region_test.c (97%)
>
> diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore
> index 16877c3daabf..5947cc119abc 100644
> --- a/tools/testing/selftests/kvm/.gitignore
> +++ b/tools/testing/selftests/kvm/.gitignore
> @@ -6,7 +6,6 @@
>   /x86_64/hyperv_cpuid
>   /x86_64/mmio_warning_test
>   /x86_64/platform_info_test
> -/x86_64/set_memory_region_test
>   /x86_64/set_sregs_test
>   /x86_64/smm_test
>   /x86_64/state_test
> @@ -21,4 +20,5 @@
>   /demand_paging_test
>   /dirty_log_test
>   /kvm_create_max_vcpus
> +/set_memory_region_test
>   /steal_time
> diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
> index 712a2ddd2a27..7af62030c12f 100644
> --- a/tools/testing/selftests/kvm/Makefile
> +++ b/tools/testing/selftests/kvm/Makefile
> @@ -17,7 +17,6 @@ TEST_GEN_PROGS_x86_64 += x86_64/evmcs_test
>   TEST_GEN_PROGS_x86_64 += x86_64/hyperv_cpuid
>   TEST_GEN_PROGS_x86_64 += x86_64/mmio_warning_test
>   TEST_GEN_PROGS_x86_64 += x86_64/platform_info_test
> -TEST_GEN_PROGS_x86_64 += x86_64/set_memory_region_test
>   TEST_GEN_PROGS_x86_64 += x86_64/set_sregs_test
>   TEST_GEN_PROGS_x86_64 += x86_64/smm_test
>   TEST_GEN_PROGS_x86_64 += x86_64/state_test
> @@ -32,12 +31,14 @@ TEST_GEN_PROGS_x86_64 += clear_dirty_log_test
>   TEST_GEN_PROGS_x86_64 += demand_paging_test
>   TEST_GEN_PROGS_x86_64 += dirty_log_test
>   TEST_GEN_PROGS_x86_64 += kvm_create_max_vcpus
> +TEST_GEN_PROGS_x86_64 += set_memory_region_test
>   TEST_GEN_PROGS_x86_64 += steal_time
>   
>   TEST_GEN_PROGS_aarch64 += clear_dirty_log_test
>   TEST_GEN_PROGS_aarch64 += demand_paging_test
>   TEST_GEN_PROGS_aarch64 += dirty_log_test
>   TEST_GEN_PROGS_aarch64 += kvm_create_max_vcpus
> +TEST_GEN_PROGS_aarch64 += set_memory_region_test
>   TEST_GEN_PROGS_aarch64 += steal_time
>   
>   TEST_GEN_PROGS_s390x = s390x/memop
> @@ -46,6 +47,7 @@ TEST_GEN_PROGS_s390x += s390x/sync_regs_test
>   TEST_GEN_PROGS_s390x += demand_paging_test
>   TEST_GEN_PROGS_s390x += dirty_log_test
>   TEST_GEN_PROGS_s390x += kvm_create_max_vcpus
> +TEST_GEN_PROGS_s390x += set_memory_region_test
>   
>   TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M))
>   LIBKVM += $(LIBKVM_$(UNAME_M))
> diff --git a/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
> similarity index 97%
> rename from tools/testing/selftests/kvm/x86_64/set_memory_region_test.c
> rename to tools/testing/selftests/kvm/set_memory_region_test.c
> index c274ce6b4ba2..0f36941ebb96 100644
> --- a/tools/testing/selftests/kvm/x86_64/set_memory_region_test.c
> +++ b/tools/testing/selftests/kvm/set_memory_region_test.c
> @@ -18,6 +18,7 @@
>   
>   #define VCPU_ID 0
>   
> +#ifdef __x86_64__
>   /*
>    * Somewhat arbitrary location and slot, intended to not overlap anything.  The
>    * location and size are specifically 2mb sized/aligned so that the initial
> @@ -288,6 +289,7 @@ static void test_delete_memory_region(void)
>   
>   	kvm_vm_free(vm);
>   }
> +#endif /* __x86_64__ */
>   
>   static void test_zero_memory_regions(void)
>   {
> @@ -299,13 +301,18 @@ static void test_zero_memory_regions(void)
>   	vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
>   	vm_vcpu_add(vm, VCPU_ID);
>   
> +#ifdef __x86_64__
>   	TEST_ASSERT(!ioctl(vm_get_fd(vm), KVM_SET_NR_MMU_PAGES, 64),
>   		    "KVM_SET_NR_MMU_PAGES failed, errno = %d\n", errno);
> -
> +#endif
>   	vcpu_run(vm, VCPU_ID);
>   
>   	run = vcpu_state(vm, VCPU_ID);
> +#ifdef __x86_64__
>   	TEST_ASSERT(run->exit_reason == KVM_EXIT_INTERNAL_ERROR,
> +#else
> +	TEST_ASSERT(run->exit_reason != KVM_EXIT_UNKNOWN,
> +#endif
>   		    "Unexpected exit_reason = %u\n", run->exit_reason);
>   
>   	kvm_vm_free(vm);
> @@ -313,13 +320,16 @@ static void test_zero_memory_regions(void)
>   
>   int main(int argc, char *argv[])
>   {
> +#ifdef __x86_64__
>   	int i, loops;
> +#endif
>   
>   	/* Tell stdout not to buffer its content */
>   	setbuf(stdout, NULL);
>   
>   	test_zero_memory_regions();
>   
> +#ifdef __x86_64__
>   	if (argc > 1)
>   		loops = atoi(argv[1]);
>   	else
> @@ -332,6 +342,7 @@ int main(int argc, char *argv[])
>   	pr_info("Testing DELETE of in-use region, %d loops\n", loops);
>   	for (i = 0; i < loops; i++)
>   		test_delete_memory_region();
> +#endif
>   
>   	return 0;
>   }