Re: [PATCH qemu v17 5/5] qtest/cxl: Add aarch64 virt test for CXL

[Itaru Kitayama <itaru.kitayama@linux.dev>]

On Thu, Jul 03, 2025 at 11:41:10AM +0100, Jonathan Cameron wrote:
> Add a single complex case for aarch64 virt machine.
> 
> Given existing much more comprehensive tests for x86 cover the common
> functionality, a single test should be enough to verify that the aarch64
> part continues to work.
> 
> Tested-by: Itaru Kitayama <itaru.kitayama@fujitsu.com>
> Reviewed-by: Eric Auger <eric.auger@redhat.com>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> 
> ---
> v17: Tag and small fix for patch description (Eric).
> ---
>  tests/qtest/cxl-test.c  | 58 ++++++++++++++++++++++++++++++++---------
>  tests/qtest/meson.build |  1 +
>  2 files changed, 46 insertions(+), 13 deletions(-)
> 
> diff --git a/tests/qtest/cxl-test.c b/tests/qtest/cxl-test.c
> index a600331843..8fb7e58d4f 100644
> --- a/tests/qtest/cxl-test.c
> +++ b/tests/qtest/cxl-test.c
> @@ -19,6 +19,12 @@
>      "-device pxb-cxl,id=cxl.1,bus=pcie.0,bus_nr=53 " \
>      "-M cxl-fmw.0.targets.0=cxl.0,cxl-fmw.0.targets.1=cxl.1,cxl-fmw.0.size=4G "
>  
> +#define QEMU_VIRT_2PXB_CMD \
> +    "-machine virt,cxl=on -cpu max " \
> +    "-device pxb-cxl,id=cxl.0,bus=pcie.0,bus_nr=52 " \
> +    "-device pxb-cxl,id=cxl.1,bus=pcie.0,bus_nr=53 " \
> +    "-M cxl-fmw.0.targets.0=cxl.0,cxl-fmw.0.targets.1=cxl.1,cxl-fmw.0.size=4G "
> +
>  #define QEMU_RP \
>      "-device cxl-rp,id=rp0,bus=cxl.0,chassis=0,slot=0 "
>  
> @@ -197,25 +203,51 @@ static void cxl_2pxb_4rp_4t3d(void)
>      qtest_end();
>      rmdir(tmpfs);
>  }
> +
> +static void cxl_virt_2pxb_4rp_4t3d(void)
> +{
> +    g_autoptr(GString) cmdline = g_string_new(NULL);
> +    g_autofree const char *tmpfs = NULL;
> +
> +    tmpfs = g_dir_make_tmp("cxl-test-XXXXXX", NULL);
> +
> +    g_string_printf(cmdline, QEMU_VIRT_2PXB_CMD QEMU_4RP QEMU_4T3D,
> +                    tmpfs, tmpfs, tmpfs, tmpfs, tmpfs, tmpfs,
> +                    tmpfs, tmpfs);
> +
> +    qtest_start(cmdline->str);
> +    qtest_end();
> +    rmdir(tmpfs);
> +}
>  #endif /* CONFIG_POSIX */
>  
>  int main(int argc, char **argv)
>  {
> -    g_test_init(&argc, &argv, NULL);
> +    const char *arch = qtest_get_arch();
>  
> -    qtest_add_func("/pci/cxl/basic_hostbridge", cxl_basic_hb);
> -    qtest_add_func("/pci/cxl/basic_pxb", cxl_basic_pxb);
> -    qtest_add_func("/pci/cxl/pxb_with_window", cxl_pxb_with_window);
> -    qtest_add_func("/pci/cxl/pxb_x2_with_window", cxl_2pxb_with_window);
> -    qtest_add_func("/pci/cxl/rp", cxl_root_port);
> -    qtest_add_func("/pci/cxl/rp_x2", cxl_2root_port);
> +    g_test_init(&argc, &argv, NULL);
> +    if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
> +        qtest_add_func("/pci/cxl/basic_hostbridge", cxl_basic_hb);
> +        qtest_add_func("/pci/cxl/basic_pxb", cxl_basic_pxb);
> +        qtest_add_func("/pci/cxl/pxb_with_window", cxl_pxb_with_window);
> +        qtest_add_func("/pci/cxl/pxb_x2_with_window", cxl_2pxb_with_window);
> +        qtest_add_func("/pci/cxl/rp", cxl_root_port);
> +        qtest_add_func("/pci/cxl/rp_x2", cxl_2root_port);
>  #ifdef CONFIG_POSIX
> -    qtest_add_func("/pci/cxl/type3_device", cxl_t3d_deprecated);
> -    qtest_add_func("/pci/cxl/type3_device_pmem", cxl_t3d_persistent);
> -    qtest_add_func("/pci/cxl/type3_device_vmem", cxl_t3d_volatile);
> -    qtest_add_func("/pci/cxl/type3_device_vmem_lsa", cxl_t3d_volatile_lsa);
> -    qtest_add_func("/pci/cxl/rp_x2_type3_x2", cxl_1pxb_2rp_2t3d);
> -    qtest_add_func("/pci/cxl/pxb_x2_root_port_x4_type3_x4", cxl_2pxb_4rp_4t3d);
> +        qtest_add_func("/pci/cxl/type3_device", cxl_t3d_deprecated);
> +        qtest_add_func("/pci/cxl/type3_device_pmem", cxl_t3d_persistent);
> +        qtest_add_func("/pci/cxl/type3_device_vmem", cxl_t3d_volatile);
> +        qtest_add_func("/pci/cxl/type3_device_vmem_lsa", cxl_t3d_volatile_lsa);
> +        qtest_add_func("/pci/cxl/rp_x2_type3_x2", cxl_1pxb_2rp_2t3d);
> +        qtest_add_func("/pci/cxl/pxb_x2_root_port_x4_type3_x4",
> +                       cxl_2pxb_4rp_4t3d);
>  #endif
> +    } else if (strcmp(arch, "aarch64") == 0) {
> +#ifdef CONFIG_POSIX
> +        qtest_add_func("/pci/cxl/virt/pxb_x2_root_port_x4_type3_x4",
> +                       cxl_virt_2pxb_4rp_4t3d);
> +#endif
> +    }
> +
>      return g_test_run();
>  }
> diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
> index 8ad849054f..42e927b32a 100644
> --- a/tests/qtest/meson.build
> +++ b/tests/qtest/meson.build
> @@ -261,6 +261,7 @@ qtests_aarch64 = \
>     config_all_devices.has_key('CONFIG_TPM_TIS_I2C') ? ['tpm-tis-i2c-test'] : []) + \
>    (config_all_devices.has_key('CONFIG_ASPEED_SOC') ? qtests_aspeed64 : []) + \
>    (config_all_devices.has_key('CONFIG_NPCM8XX') ? qtests_npcm8xx : []) + \
> +  qtests_cxl +                                                                                  \
>    ['arm-cpu-features',
>     'numa-test',
>     'boot-serial-test',
> -- 

I checked out jic23/cxl-2025-07-03 branch and built fine for all the
architectures, and did `meson test qtest-aarch64/cxl-test` returned OK.

Again, for the latest v17

Tested-by: Itaru Kitayama <itaru.kitayama@fujitsu.com>

Thanks,
Itaru.

> 2.48.1
>