Re: [RFC PATCH v12 qemu 2/2] qtest/cxl: Add aarch64 virt test for CXL

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

Jonathan,

> On Feb 4, 2025, at 2:30, Jonathan Cameron <Jonathan.Cameron@huawei.com> 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 continue to work.
> 
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
> tests/qtest/cxl-test.c  | 59 ++++++++++++++++++++++++++++++++---------
> tests/qtest/meson.build |  1 +
> 2 files changed, 47 insertions(+), 13 deletions(-)
> 
> diff --git a/tests/qtest/cxl-test.c b/tests/qtest/cxl-test.c
> index a600331843..c7189d6222 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 +203,52 @@ 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);
> +    char template[] = "/tmp/cxl-test-XXXXXX";
> +    const char *tmpfs;
> +
> +    tmpfs = mkdtemp(template);
> +
> +    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 e60e92fe9d..f5e7fb060e 100644
> --- a/tests/qtest/meson.build
> +++ b/tests/qtest/meson.build
> @@ -257,6 +257,7 @@ qtests_aarch64 = \
>   (config_all_accel.has_key('CONFIG_TCG') and                                            \
>    config_all_devices.has_key('CONFIG_TPM_TIS_I2C') ? ['tpm-tis-i2c-test'] : []) + \
>   (config_all_devices.has_key('CONFIG_ASPEED_SOC') ? qtests_aspeed64 : []) + \
> +  qtests_cxl +                                                                                  \
>   ['arm-cpu-features',
>    'numa-test',
>    'boot-serial-test',
> -- 
> 2.43.0
> 

In Ubuntu 22.04 LTS, cxl-test applied on top of today’s QEMU upstream master branch cxl-test fails:

$ ./tests/qtest/cxl-test
# random seed: R02S2a8b02df7b32b79d086ce22f7f8ebeab
1..1
# Start of aarch64 tests
# Start of pci tests
# Start of cxl tests
# Start of virt tests
# starting QEMU: exec qemu-system-aarch64 -qtest unix:/tmp/qtest-568421.sock -qtest-log /dev/null -chardev socket,path=/tmp/qtest-568421.qmp,id=char0 -mon chardev=char0,mode=control -display none -audio none -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 -device cxl-rp,id=rp0,bus=cxl.0,chassis=0,slot=0 -device cxl-rp,id=rp1,bus=cxl.0,chassis=0,slot=1 -device cxl-rp,id=rp2,bus=cxl.1,chassis=0,slot=2 -device cxl-rp,id=rp3,bus=cxl.1,chassis=0,slot=3 -object memory-backend-file,id=cxl-mem0,mem-path=/tmp/cxl-test-WdBn4X,size=256M -object memory-backend-file,id=lsa0,mem-path=/tmp/cxl-test-WdBn4X,size=256M -device cxl-type3,bus=rp0,persistent-memdev=cxl-mem0,lsa=lsa0,id=pmem0 -object memory-backend-file,id=cxl-mem1,mem-path=/tmp/cxl-test-WdBn4X,size=256M -object memory-backend-file,id=lsa1,mem-path=/tmp/cxl-test-WdBn4X,size=256M -device cxl-type3,bus=rp1,persistent-memdev=cxl-mem1,lsa=lsa1,id=pmem1 -object memory-backend-file,id=cxl-mem2,mem-path=/tmp/cxl-test-WdBn4X,size=256M -object memory-backend-file,id=lsa2,mem-path=/tmp/cxl-test-WdBn4X,size=256M -device cxl-type3,bus=rp2,persistent-memdev=cxl-mem2,lsa=lsa2,id=pmem2 -object memory-backend-file,id=cxl-mem3,mem-path=/tmp/cxl-test-WdBn4X,size=256M -object memory-backend-file,id=lsa3,mem-path=/tmp/cxl-test-WdBn4X,size=256M -device cxl-type3,bus=rp3,persistent-memdev=cxl-mem3,lsa=lsa3,id=pmem3  -accel qtest
qemu-system-aarch64: -audio: invalid option
socket_accept failed: Resource temporarily unavailable
**
ERROR:../tests/qtest/libqtest.c:550:qtest_connect: assertion failed: (s->fd >= 0 && s->qmp_fd >= 0)
Bail out! ERROR:../tests/qtest/libqtest.c:550:qtest_connect: assertion failed: (s->fd >= 0 && s->qmp_fd >= 0)
../tests/qtest/libqtest.c:199: kill_qemu() tried to terminate QEMU process but encountered exit status 1 (expected 0)
Aborted (core dumped)

Do I need set env vars when execute this test?

Itaru.