Re: [PATCH v8 08/11] tests/qtest: Fix tests when no KVM or TCG are present

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Mar 09, 2023 at 05:14:31PM -0300, Fabiano Rosas wrote:
> It is possible to have a build with both TCG and KVM disabled due to
> Xen requiring the i386 and x86_64 binaries to be present in an aarch64
> host.
> 
> If we build with --disable-tcg on the aarch64 host, we will end-up
> with a QEMU binary (x86) that does not support TCG nor KVM.
> 
> Fix tests that crash or hang in the above scenario. Do not include any
> test cases if TCG and KVM are missing.
> 
> Make sure that calls to qtest_has_accel are placed after g_test_init
> in similar fashion to commit ae4b01b349 ("tests: Ensure TAP version is
> printed before other messages") to avoid TAP parsing errors.
> 
> Signed-off-by: Fabiano Rosas <farosas@suse.de>
> Reviewed-by: Juan Quintela <quintela@redhat.com>

I don't like it that it's a pass not a skip.

Also, if we are not testing acpi should we not
skip building acpi?

Also, a misconfigured qemu would previously be caught,
now it will seem to pass tests.
How about a special make check target that will just test
xen things?



> ---
> This currently affects Arm, but will also affect x86 after the xenpvh
> series gets merged. This patch fixes both scenarios.
> ---
>  tests/qtest/bios-tables-test.c | 10 ++++++++--
>  tests/qtest/boot-serial-test.c | 10 ++++++++++
>  tests/qtest/migration-test.c   |  9 ++++++++-
>  tests/qtest/pxe-test.c         |  7 ++++++-
>  tests/qtest/vmgenid-test.c     |  8 ++++++--
>  5 files changed, 38 insertions(+), 6 deletions(-)
> 
> diff --git a/tests/qtest/bios-tables-test.c b/tests/qtest/bios-tables-test.c
> index d29a4e47af..5cbad2f29f 100644
> --- a/tests/qtest/bios-tables-test.c
> +++ b/tests/qtest/bios-tables-test.c
> @@ -2109,8 +2109,7 @@ static void test_acpi_virt_oem_fields(void)
>  int main(int argc, char *argv[])
>  {
>      const char *arch = qtest_get_arch();
> -    const bool has_kvm = qtest_has_accel("kvm");
> -    const bool has_tcg = qtest_has_accel("tcg");
> +    bool has_kvm, has_tcg;
>      char *v_env = getenv("V");
>      int ret;
>  
> @@ -2120,6 +2119,13 @@ int main(int argc, char *argv[])
>  
>      g_test_init(&argc, &argv, NULL);
>  
> +    has_kvm = qtest_has_accel("kvm");
> +    has_tcg = qtest_has_accel("tcg");
> +
> +    if (!has_tcg && !has_kvm) {
> +        return 0;
> +    }
> +
>      if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
>          ret = boot_sector_init(disk);
>          if (ret) {
> diff --git a/tests/qtest/boot-serial-test.c b/tests/qtest/boot-serial-test.c
> index 3aef3a97a9..406b4421cc 100644
> --- a/tests/qtest/boot-serial-test.c
> +++ b/tests/qtest/boot-serial-test.c
> @@ -17,6 +17,9 @@
>  #include "libqtest.h"
>  #include "libqos/libqos-spapr.h"
>  
> +static bool has_tcg;
> +static bool has_kvm;
> +
>  static const uint8_t bios_avr[] = {
>      0x88, 0xe0,             /* ldi r24, 0x08   */
>      0x80, 0x93, 0xc1, 0x00, /* sts 0x00C1, r24 ; Enable tx */
> @@ -287,6 +290,13 @@ int main(int argc, char *argv[])
>  
>      g_test_init(&argc, &argv, NULL);
>  
> +    has_tcg = qtest_has_accel("tcg");
> +    has_kvm = qtest_has_accel("kvm");
> +
> +    if (!has_tcg && !has_kvm) {
> +        return 0;
> +    }
> +
>      for (i = 0; tests[i].arch != NULL; i++) {
>          if (g_str_equal(arch, tests[i].arch) &&
>              qtest_has_machine(tests[i].machine)) {
> diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
> index d4ab3934ed..7eedee7b2d 100644
> --- a/tests/qtest/migration-test.c
> +++ b/tests/qtest/migration-test.c
> @@ -2459,7 +2459,7 @@ static bool kvm_dirty_ring_supported(void)
>  
>  int main(int argc, char **argv)
>  {
> -    const bool has_kvm = qtest_has_accel("kvm");
> +    bool has_kvm, has_tcg;
>      const bool has_uffd = ufd_version_check();
>      const char *arch = qtest_get_arch();
>      g_autoptr(GError) err = NULL;
> @@ -2467,6 +2467,13 @@ int main(int argc, char **argv)
>  
>      g_test_init(&argc, &argv, NULL);
>  
> +    has_kvm = qtest_has_accel("kvm");
> +    has_tcg = qtest_has_accel("tcg");
> +
> +    if (!has_tcg && !has_kvm) {
> +        return 0;
> +    }
> +
>      /*
>       * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
>       * is touchy due to race conditions on dirty bits (especially on PPC for
> diff --git a/tests/qtest/pxe-test.c b/tests/qtest/pxe-test.c
> index 62b6eef464..935b661dac 100644
> --- a/tests/qtest/pxe-test.c
> +++ b/tests/qtest/pxe-test.c
> @@ -131,11 +131,16 @@ int main(int argc, char *argv[])
>      int ret;
>      const char *arch = qtest_get_arch();
>  
> +    g_test_init(&argc, &argv, NULL);
> +
> +    if (!qtest_has_accel("tcg") && !qtest_has_accel("kvm")) {
> +        return 0;
> +    }
> +
>      ret = boot_sector_init(disk);
>      if(ret)
>          return ret;
>  
> -    g_test_init(&argc, &argv, NULL);
>  
>      if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
>          test_batch(x86_tests, false);
> diff --git a/tests/qtest/vmgenid-test.c b/tests/qtest/vmgenid-test.c
> index efba76e716..9eb6371ae8 100644
> --- a/tests/qtest/vmgenid-test.c
> +++ b/tests/qtest/vmgenid-test.c
> @@ -165,13 +165,17 @@ int main(int argc, char **argv)
>  {
>      int ret;
>  
> +    g_test_init(&argc, &argv, NULL);
> +
> +    if (!qtest_has_accel("tcg") && !qtest_has_accel("kvm")) {
> +        return 0;
> +    }
> +
>      ret = boot_sector_init(disk);
>      if (ret) {
>          return ret;
>      }
>  
> -    g_test_init(&argc, &argv, NULL);
> -
>      qtest_add_func("/vmgenid/vmgenid/set-guid",
>                     vmgenid_set_guid_test);
>      qtest_add_func("/vmgenid/vmgenid/set-guid-auto",
> -- 
> 2.35.3