[v4] tests/functional/aarch64: add tests for FEAT_RME

This boot an OP-TEE environment, and launch a nested guest VM inside it
using the Realms feature. We do it for virt and sbsa-ref platforms.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>

-----

v2:
- move test to its own file
- add sbsa test
- check output of `cca-workload-attestation report`

v3:
- build and run test with cca-v4 images
- factorize nested guest test between both tests
- remove accel tcg option as it is the default when running tests
Note: It's a long test and there is a work in progress to understand why
debug build is so slow (x12 vs optimized).

v4:
- use pauth-impdef=on to speed up build time execution (x2.5 faster)
- increase timeout value

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
 tests/functional/meson.build                 |   4 +
 tests/functional/test_aarch64_rme_sbsaref.py |  70 +++++++++++++
 tests/functional/test_aarch64_rme_virt.py    | 100 +++++++++++++++++++
 3 files changed, 174 insertions(+)
 create mode 100755 tests/functional/test_aarch64_rme_sbsaref.py
 create mode 100755 tests/functional/test_aarch64_rme_virt.py

Pierrick Bouvier <pierrick.bouvier@linaro.org> writes:

> This boot an OP-TEE environment, and launch a nested guest VM inside it
> using the Realms feature. We do it for virt and sbsa-ref platforms.
>
> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>

Queued to testing/next, thanks.

On 12/4/24 01:38, Alex Bennée wrote:
> Pierrick Bouvier <pierrick.bouvier@linaro.org> writes:
> 
>> This boot an OP-TEE environment, and launch a nested guest VM inside it
>> using the Realms feature. We do it for virt and sbsa-ref platforms.
>>
>> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
> 
> Queued to testing/next, thanks.
> 

Thanks Alex.

FYI, this test triggers a ubsan issue, that I fixed in [1].

As Peter did good efforts to cleanup ubsan issues we had (none left from 
what I tried), it would be unfortunate to reintroduce one at the same 
time we merge the current patch.

[1] 
https://lore.kernel.org/qemu-devel/20241204195111.2921141-1-pierrick.bouvier@linaro.org/T/#u

On Tue, Dec 03, 2024 at 01:36:29PM -0800, Pierrick Bouvier wrote:
> This boot an OP-TEE environment, and launch a nested guest VM inside it
> using the Realms feature. We do it for virt and sbsa-ref platforms.
> 
> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
> 
> -----
> 
> v2:
> - move test to its own file
> - add sbsa test
> - check output of `cca-workload-attestation report`
> 
> v3:
> - build and run test with cca-v4 images
> - factorize nested guest test between both tests
> - remove accel tcg option as it is the default when running tests
> Note: It's a long test and there is a work in progress to understand why
> debug build is so slow (x12 vs optimized).
> 
> v4:
> - use pauth-impdef=on to speed up build time execution (x2.5 faster)
> - increase timeout value
> 
> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
> ---
>  tests/functional/meson.build                 |   4 +
>  tests/functional/test_aarch64_rme_sbsaref.py |  70 +++++++++++++
>  tests/functional/test_aarch64_rme_virt.py    | 100 +++++++++++++++++++
>  3 files changed, 174 insertions(+)
>  create mode 100755 tests/functional/test_aarch64_rme_sbsaref.py
>  create mode 100755 tests/functional/test_aarch64_rme_virt.py
> 
> diff --git a/tests/functional/meson.build b/tests/functional/meson.build
> index 5c048cfac6d..60ae7bbd3d6 100644
> --- a/tests/functional/meson.build
> +++ b/tests/functional/meson.build
> @@ -13,6 +13,8 @@ endif
>  test_timeouts = {
>    'aarch64_aspeed' : 600,
>    'aarch64_raspi4' : 480,
> +  'aarch64_rme_virt' : 1200,
> +  'aarch64_rme_sbsaref' : 1200,

These 20 minute timeouts seem rather excessive.

On my test machines _virt runs in 45 seconds, and _sbsaref
runs in 2m20. The latter is slow, but not dramatically
different from our other slow tests. It doesn't feel like
it justifies a 20 minute timeout ?

>    'aarch64_sbsaref_alpine' : 720,
>    'aarch64_sbsaref_freebsd' : 720,
>    'aarch64_tuxrun' : 240,
> @@ -52,6 +54,8 @@ tests_aarch64_system_thorough = [
>    'aarch64_aspeed',
>    'aarch64_raspi3',
>    'aarch64_raspi4',
> +  'aarch64_rme_virt',
> +  'aarch64_rme_sbsaref',
>    'aarch64_sbsaref',
>    'aarch64_sbsaref_alpine',
>    'aarch64_sbsaref_freebsd',
> diff --git a/tests/functional/test_aarch64_rme_sbsaref.py b/tests/functional/test_aarch64_rme_sbsaref.py
> new file mode 100755
> index 00000000000..c136b5ce178
> --- /dev/null
> +++ b/tests/functional/test_aarch64_rme_sbsaref.py
> @@ -0,0 +1,70 @@
> +#!/usr/bin/env python3
> +#
> +# Functional test that boots a Realms environment on sbsa-ref machine and a
> +# nested guest VM using it.
> +#
> +# Copyright (c) 2024 Linaro Ltd.
> +#
> +# Author: Pierrick Bouvier <pierrick.bouvier@linaro.org>
> +#
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +
> +import time
> +import os
> +import logging
> +
> +from qemu_test import QemuSystemTest, Asset
> +from qemu_test import exec_command, wait_for_console_pattern
> +from qemu_test import exec_command_and_wait_for_pattern
> +from qemu_test.utils import archive_extract
> +from test_aarch64_rme_virt import test_realms_guest
> +
> +class Aarch64RMESbsaRefMachine(QemuSystemTest):
> +
> +    # Stack is built with OP-TEE build environment from those instructions:
> +    # https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/
> +    # https://github.com/pbo-linaro/qemu-rme-stack
> +    ASSET_RME_STACK_SBSA = Asset(
> +        ('https://fileserver.linaro.org/s/KJyeBxL82mz2r7F/'
> +         'download/rme-stack-op-tee-4.2.0-cca-v4-sbsa.tar.gz'),
> +         'dd9ab28ec869bdf3b5376116cb3689103b43433fd5c4bca0f4a8d8b3c104999e')
> +
> +    # This tests the FEAT_RME cpu implementation, by booting a VM supporting it,
> +    # and launching a nested VM using it.
> +    def test_aarch64_rme_sbsaref(self):
> +        stack_path_tar_gz = self.ASSET_RME_STACK_SBSA.fetch()
> +        archive_extract(stack_path_tar_gz, self.workdir)
> +
> +        self.set_machine('sbsa-ref')
> +        self.vm.set_console()
> +        self.require_accelerator('tcg')
> +
> +        rme_stack = os.path.join(self.workdir,
> +                                 'rme-stack-op-tee-4.2.0-cca-v4-sbsa')
> +        pflash0 = os.path.join(rme_stack, 'images', 'SBSA_FLASH0.fd')
> +        pflash1 = os.path.join(rme_stack, 'images', 'SBSA_FLASH1.fd')
> +        virtual = os.path.join(rme_stack, 'images', 'disks', 'virtual')
> +        drive = os.path.join(rme_stack, 'out-br', 'images', 'rootfs.ext4')
> +
> +        self.vm.add_args('-cpu', 'max,x-rme=on,pauth-impdef=on')
> +        self.vm.add_args('-m', '2G')
> +        self.vm.add_args('-M', 'sbsa-ref')
> +        self.vm.add_args('-drive', f'file={pflash0},format=raw,if=pflash')
> +        self.vm.add_args('-drive', f'file={pflash1},format=raw,if=pflash')
> +        self.vm.add_args('-drive', f'file=fat:rw:{virtual},format=raw')
> +        self.vm.add_args('-drive', f'format=raw,if=none,file={drive},id=hd0')
> +        self.vm.add_args('-device', 'virtio-blk-pci,drive=hd0')
> +        self.vm.add_args('-device', 'virtio-9p-pci,fsdev=shr0,mount_tag=shr0')
> +        self.vm.add_args('-fsdev', f'local,security_model=none,path={rme_stack},id=shr0')
> +        self.vm.add_args('-device', 'virtio-net-pci,netdev=net0')
> +        self.vm.add_args('-netdev', 'user,id=net0')
> +
> +        self.vm.launch()
> +        # Wait for host VM boot to complete.
> +        wait_for_console_pattern(self, 'Welcome to Buildroot')
> +        exec_command_and_wait_for_pattern(self, 'root', '#')
> +
> +        test_realms_guest(self)
> +
> +if __name__ == '__main__':
> +    QemuSystemTest.main()
> diff --git a/tests/functional/test_aarch64_rme_virt.py b/tests/functional/test_aarch64_rme_virt.py
> new file mode 100755
> index 00000000000..39e4e4adb5f
> --- /dev/null
> +++ b/tests/functional/test_aarch64_rme_virt.py
> @@ -0,0 +1,100 @@
> +#!/usr/bin/env python3
> +#
> +# Functional test that boots a Realms environment on virt machine and a nested
> +# guest VM using it.
> +#
> +# Copyright (c) 2024 Linaro Ltd.
> +#
> +# Author: Pierrick Bouvier <pierrick.bouvier@linaro.org>
> +#
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +
> +import time
> +import os
> +import logging
> +
> +from qemu_test import QemuSystemTest, Asset
> +from qemu_test import exec_command, wait_for_console_pattern
> +from qemu_test import exec_command_and_wait_for_pattern
> +from qemu_test.utils import archive_extract
> +
> +def test_realms_guest(test_rme_instance):
> +
> +    # Boot the (nested) guest VM
> +    exec_command(test_rme_instance,
> +                 'qemu-system-aarch64 -M virt,gic-version=3 '
> +                 '-cpu host -enable-kvm -m 512M '
> +                 '-M confidential-guest-support=rme0 '
> +                 '-object rme-guest,id=rme0 '
> +                 '-device virtio-net-pci,netdev=net0,romfile= '
> +                 '-netdev user,id=net0 '
> +                 '-kernel /mnt/out/bin/Image '
> +                 '-initrd /mnt/out-br/images/rootfs.cpio '
> +                 '-serial stdio')
> +    # Detect Realm activation during (nested) guest boot.
> +    wait_for_console_pattern(test_rme_instance,
> +                             'SMC_RMI_REALM_ACTIVATE')
> +    # Wait for (nested) guest boot to complete.
> +    wait_for_console_pattern(test_rme_instance,
> +                             'Welcome to Buildroot')
> +    exec_command_and_wait_for_pattern(test_rme_instance, 'root', '#')
> +    # query (nested) guest cca report
> +    exec_command(test_rme_instance, 'cca-workload-attestation report')
> +    wait_for_console_pattern(test_rme_instance,
> +                             '"cca-platform-hash-algo-id": "sha-256"')
> +    wait_for_console_pattern(test_rme_instance,
> +                             '"cca-realm-hash-algo-id": "sha-512"')
> +    wait_for_console_pattern(test_rme_instance,
> +                             '"cca-realm-public-key-hash-algo-id": "sha-256"')
> +
> +class Aarch64RMEVirtMachine(QemuSystemTest):
> +
> +    # Stack is built with OP-TEE build environment from those instructions:
> +    # https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/
> +    # https://github.com/pbo-linaro/qemu-rme-stack
> +    ASSET_RME_STACK_VIRT = Asset(
> +        ('https://fileserver.linaro.org/s/iaRsNDJp2CXHMSJ/'
> +         'download/rme-stack-op-tee-4.2.0-cca-v4-qemu_v8.tar.gz'),
> +         '1851adc232b094384d8b879b9a2cfff07ef3d6205032b85e9b3a4a9ae6b0b7ad')
> +
> +    # This tests the FEAT_RME cpu implementation, by booting a VM supporting it,
> +    # and launching a nested VM using it.
> +    def test_aarch64_rme_virt(self):
> +        stack_path_tar_gz = self.ASSET_RME_STACK_VIRT.fetch()
> +        archive_extract(stack_path_tar_gz, self.workdir)
> +
> +        self.set_machine('virt')
> +        self.vm.set_console()
> +        self.require_accelerator('tcg')
> +
> +        rme_stack = os.path.join(self.workdir,
> +                                 'rme-stack-op-tee-4.2.0-cca-v4-qemu_v8')
> +        kernel = os.path.join(rme_stack, 'out', 'bin', 'Image')
> +        bios = os.path.join(rme_stack, 'out', 'bin', 'flash.bin')
> +        drive = os.path.join(rme_stack, 'out-br', 'images', 'rootfs.ext4')
> +
> +        self.vm.add_args('-cpu', 'max,x-rme=on,pauth-impdef=on')
> +        self.vm.add_args('-m', '2G')
> +        self.vm.add_args('-M', 'virt,acpi=off,'
> +                         'virtualization=on,'
> +                         'secure=on,'
> +                         'gic-version=3')
> +        self.vm.add_args('-bios', bios)
> +        self.vm.add_args('-kernel', kernel)
> +        self.vm.add_args('-drive', f'format=raw,if=none,file={drive},id=hd0')
> +        self.vm.add_args('-device', 'virtio-blk-pci,drive=hd0')
> +        self.vm.add_args('-device', 'virtio-9p-device,fsdev=shr0,mount_tag=shr0')
> +        self.vm.add_args('-fsdev', f'local,security_model=none,path={rme_stack},id=shr0')
> +        self.vm.add_args('-device', 'virtio-net-pci,netdev=net0')
> +        self.vm.add_args('-netdev', 'user,id=net0')
> +        self.vm.add_args('-append', 'root=/dev/vda')
> +
> +        self.vm.launch()
> +        # Wait for host VM boot to complete.
> +        wait_for_console_pattern(self, 'Welcome to Buildroot')
> +        exec_command_and_wait_for_pattern(self, 'root', '#')
> +
> +        test_realms_guest(self)
> +
> +if __name__ == '__main__':
> +    QemuSystemTest.main()
> -- 
> 2.39.5
> 
> 

With regards,
Daniel

On 12/5/24 02:28, Daniel P. Berrangé wrote:
> On Tue, Dec 03, 2024 at 01:36:29PM -0800, Pierrick Bouvier wrote:
>> This boot an OP-TEE environment, and launch a nested guest VM inside it
>> using the Realms feature. We do it for virt and sbsa-ref platforms.
>>
>> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
>>
>> -----
>>
>> v2:
>> - move test to its own file
>> - add sbsa test
>> - check output of `cca-workload-attestation report`
>>
>> v3:
>> - build and run test with cca-v4 images
>> - factorize nested guest test between both tests
>> - remove accel tcg option as it is the default when running tests
>> Note: It's a long test and there is a work in progress to understand why
>> debug build is so slow (x12 vs optimized).
>>
>> v4:
>> - use pauth-impdef=on to speed up build time execution (x2.5 faster)
>> - increase timeout value
>>
>> Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
>> ---
>>   tests/functional/meson.build                 |   4 +
>>   tests/functional/test_aarch64_rme_sbsaref.py |  70 +++++++++++++
>>   tests/functional/test_aarch64_rme_virt.py    | 100 +++++++++++++++++++
>>   3 files changed, 174 insertions(+)
>>   create mode 100755 tests/functional/test_aarch64_rme_sbsaref.py
>>   create mode 100755 tests/functional/test_aarch64_rme_virt.py
>>
>> diff --git a/tests/functional/meson.build b/tests/functional/meson.build
>> index 5c048cfac6d..60ae7bbd3d6 100644
>> --- a/tests/functional/meson.build
>> +++ b/tests/functional/meson.build
>> @@ -13,6 +13,8 @@ endif
>>   test_timeouts = {
>>     'aarch64_aspeed' : 600,
>>     'aarch64_raspi4' : 480,
>> +  'aarch64_rme_virt' : 1200,
>> +  'aarch64_rme_sbsaref' : 1200,
> 
> These 20 minute timeouts seem rather excessive.
> 
> On my test machines _virt runs in 45 seconds, and _sbsaref
> runs in 2m20. The latter is slow, but not dramatically
> different from our other slow tests. It doesn't feel like
> it justifies a 20 minute timeout ?
> 

You can try again with a debug build, and you'll observe that 20 minutes 
is not so conservative (I hit 8 to 10 min on my machine easily, so 
taking the double considering the x2/x3 "CI slowness" factor is not so 
crazy).
The v2 and v3 versions of the patch contain more details.

>>     'aarch64_sbsaref_alpine' : 720,
>>     'aarch64_sbsaref_freebsd' : 720,
>>     'aarch64_tuxrun' : 240,
>> @@ -52,6 +54,8 @@ tests_aarch64_system_thorough = [
>>     'aarch64_aspeed',
>>     'aarch64_raspi3',
>>     'aarch64_raspi4',
>> +  'aarch64_rme_virt',
>> +  'aarch64_rme_sbsaref',
>>     'aarch64_sbsaref',
>>     'aarch64_sbsaref_alpine',
>>     'aarch64_sbsaref_freebsd',
>> diff --git a/tests/functional/test_aarch64_rme_sbsaref.py b/tests/functional/test_aarch64_rme_sbsaref.py
>> new file mode 100755
>> index 00000000000..c136b5ce178
>> --- /dev/null
>> +++ b/tests/functional/test_aarch64_rme_sbsaref.py
>> @@ -0,0 +1,70 @@
>> +#!/usr/bin/env python3
>> +#
>> +# Functional test that boots a Realms environment on sbsa-ref machine and a
>> +# nested guest VM using it.
>> +#
>> +# Copyright (c) 2024 Linaro Ltd.
>> +#
>> +# Author: Pierrick Bouvier <pierrick.bouvier@linaro.org>
>> +#
>> +# SPDX-License-Identifier: GPL-2.0-or-later
>> +
>> +import time
>> +import os
>> +import logging
>> +
>> +from qemu_test import QemuSystemTest, Asset
>> +from qemu_test import exec_command, wait_for_console_pattern
>> +from qemu_test import exec_command_and_wait_for_pattern
>> +from qemu_test.utils import archive_extract
>> +from test_aarch64_rme_virt import test_realms_guest
>> +
>> +class Aarch64RMESbsaRefMachine(QemuSystemTest):
>> +
>> +    # Stack is built with OP-TEE build environment from those instructions:
>> +    # https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/
>> +    # https://github.com/pbo-linaro/qemu-rme-stack
>> +    ASSET_RME_STACK_SBSA = Asset(
>> +        ('https://fileserver.linaro.org/s/KJyeBxL82mz2r7F/'
>> +         'download/rme-stack-op-tee-4.2.0-cca-v4-sbsa.tar.gz'),
>> +         'dd9ab28ec869bdf3b5376116cb3689103b43433fd5c4bca0f4a8d8b3c104999e')
>> +
>> +    # This tests the FEAT_RME cpu implementation, by booting a VM supporting it,
>> +    # and launching a nested VM using it.
>> +    def test_aarch64_rme_sbsaref(self):
>> +        stack_path_tar_gz = self.ASSET_RME_STACK_SBSA.fetch()
>> +        archive_extract(stack_path_tar_gz, self.workdir)
>> +
>> +        self.set_machine('sbsa-ref')
>> +        self.vm.set_console()
>> +        self.require_accelerator('tcg')
>> +
>> +        rme_stack = os.path.join(self.workdir,
>> +                                 'rme-stack-op-tee-4.2.0-cca-v4-sbsa')
>> +        pflash0 = os.path.join(rme_stack, 'images', 'SBSA_FLASH0.fd')
>> +        pflash1 = os.path.join(rme_stack, 'images', 'SBSA_FLASH1.fd')
>> +        virtual = os.path.join(rme_stack, 'images', 'disks', 'virtual')
>> +        drive = os.path.join(rme_stack, 'out-br', 'images', 'rootfs.ext4')
>> +
>> +        self.vm.add_args('-cpu', 'max,x-rme=on,pauth-impdef=on')
>> +        self.vm.add_args('-m', '2G')
>> +        self.vm.add_args('-M', 'sbsa-ref')
>> +        self.vm.add_args('-drive', f'file={pflash0},format=raw,if=pflash')
>> +        self.vm.add_args('-drive', f'file={pflash1},format=raw,if=pflash')
>> +        self.vm.add_args('-drive', f'file=fat:rw:{virtual},format=raw')
>> +        self.vm.add_args('-drive', f'format=raw,if=none,file={drive},id=hd0')
>> +        self.vm.add_args('-device', 'virtio-blk-pci,drive=hd0')
>> +        self.vm.add_args('-device', 'virtio-9p-pci,fsdev=shr0,mount_tag=shr0')
>> +        self.vm.add_args('-fsdev', f'local,security_model=none,path={rme_stack},id=shr0')
>> +        self.vm.add_args('-device', 'virtio-net-pci,netdev=net0')
>> +        self.vm.add_args('-netdev', 'user,id=net0')
>> +
>> +        self.vm.launch()
>> +        # Wait for host VM boot to complete.
>> +        wait_for_console_pattern(self, 'Welcome to Buildroot')
>> +        exec_command_and_wait_for_pattern(self, 'root', '#')
>> +
>> +        test_realms_guest(self)
>> +
>> +if __name__ == '__main__':
>> +    QemuSystemTest.main()
>> diff --git a/tests/functional/test_aarch64_rme_virt.py b/tests/functional/test_aarch64_rme_virt.py
>> new file mode 100755
>> index 00000000000..39e4e4adb5f
>> --- /dev/null
>> +++ b/tests/functional/test_aarch64_rme_virt.py
>> @@ -0,0 +1,100 @@
>> +#!/usr/bin/env python3
>> +#
>> +# Functional test that boots a Realms environment on virt machine and a nested
>> +# guest VM using it.
>> +#
>> +# Copyright (c) 2024 Linaro Ltd.
>> +#
>> +# Author: Pierrick Bouvier <pierrick.bouvier@linaro.org>
>> +#
>> +# SPDX-License-Identifier: GPL-2.0-or-later
>> +
>> +import time
>> +import os
>> +import logging
>> +
>> +from qemu_test import QemuSystemTest, Asset
>> +from qemu_test import exec_command, wait_for_console_pattern
>> +from qemu_test import exec_command_and_wait_for_pattern
>> +from qemu_test.utils import archive_extract
>> +
>> +def test_realms_guest(test_rme_instance):
>> +
>> +    # Boot the (nested) guest VM
>> +    exec_command(test_rme_instance,
>> +                 'qemu-system-aarch64 -M virt,gic-version=3 '
>> +                 '-cpu host -enable-kvm -m 512M '
>> +                 '-M confidential-guest-support=rme0 '
>> +                 '-object rme-guest,id=rme0 '
>> +                 '-device virtio-net-pci,netdev=net0,romfile= '
>> +                 '-netdev user,id=net0 '
>> +                 '-kernel /mnt/out/bin/Image '
>> +                 '-initrd /mnt/out-br/images/rootfs.cpio '
>> +                 '-serial stdio')
>> +    # Detect Realm activation during (nested) guest boot.
>> +    wait_for_console_pattern(test_rme_instance,
>> +                             'SMC_RMI_REALM_ACTIVATE')
>> +    # Wait for (nested) guest boot to complete.
>> +    wait_for_console_pattern(test_rme_instance,
>> +                             'Welcome to Buildroot')
>> +    exec_command_and_wait_for_pattern(test_rme_instance, 'root', '#')
>> +    # query (nested) guest cca report
>> +    exec_command(test_rme_instance, 'cca-workload-attestation report')
>> +    wait_for_console_pattern(test_rme_instance,
>> +                             '"cca-platform-hash-algo-id": "sha-256"')
>> +    wait_for_console_pattern(test_rme_instance,
>> +                             '"cca-realm-hash-algo-id": "sha-512"')
>> +    wait_for_console_pattern(test_rme_instance,
>> +                             '"cca-realm-public-key-hash-algo-id": "sha-256"')
>> +
>> +class Aarch64RMEVirtMachine(QemuSystemTest):
>> +
>> +    # Stack is built with OP-TEE build environment from those instructions:
>> +    # https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/
>> +    # https://github.com/pbo-linaro/qemu-rme-stack
>> +    ASSET_RME_STACK_VIRT = Asset(
>> +        ('https://fileserver.linaro.org/s/iaRsNDJp2CXHMSJ/'
>> +         'download/rme-stack-op-tee-4.2.0-cca-v4-qemu_v8.tar.gz'),
>> +         '1851adc232b094384d8b879b9a2cfff07ef3d6205032b85e9b3a4a9ae6b0b7ad')
>> +
>> +    # This tests the FEAT_RME cpu implementation, by booting a VM supporting it,
>> +    # and launching a nested VM using it.
>> +    def test_aarch64_rme_virt(self):
>> +        stack_path_tar_gz = self.ASSET_RME_STACK_VIRT.fetch()
>> +        archive_extract(stack_path_tar_gz, self.workdir)
>> +
>> +        self.set_machine('virt')
>> +        self.vm.set_console()
>> +        self.require_accelerator('tcg')
>> +
>> +        rme_stack = os.path.join(self.workdir,
>> +                                 'rme-stack-op-tee-4.2.0-cca-v4-qemu_v8')
>> +        kernel = os.path.join(rme_stack, 'out', 'bin', 'Image')
>> +        bios = os.path.join(rme_stack, 'out', 'bin', 'flash.bin')
>> +        drive = os.path.join(rme_stack, 'out-br', 'images', 'rootfs.ext4')
>> +
>> +        self.vm.add_args('-cpu', 'max,x-rme=on,pauth-impdef=on')
>> +        self.vm.add_args('-m', '2G')
>> +        self.vm.add_args('-M', 'virt,acpi=off,'
>> +                         'virtualization=on,'
>> +                         'secure=on,'
>> +                         'gic-version=3')
>> +        self.vm.add_args('-bios', bios)
>> +        self.vm.add_args('-kernel', kernel)
>> +        self.vm.add_args('-drive', f'format=raw,if=none,file={drive},id=hd0')
>> +        self.vm.add_args('-device', 'virtio-blk-pci,drive=hd0')
>> +        self.vm.add_args('-device', 'virtio-9p-device,fsdev=shr0,mount_tag=shr0')
>> +        self.vm.add_args('-fsdev', f'local,security_model=none,path={rme_stack},id=shr0')
>> +        self.vm.add_args('-device', 'virtio-net-pci,netdev=net0')
>> +        self.vm.add_args('-netdev', 'user,id=net0')
>> +        self.vm.add_args('-append', 'root=/dev/vda')
>> +
>> +        self.vm.launch()
>> +        # Wait for host VM boot to complete.
>> +        wait_for_console_pattern(self, 'Welcome to Buildroot')
>> +        exec_command_and_wait_for_pattern(self, 'root', '#')
>> +
>> +        test_realms_guest(self)
>> +
>> +if __name__ == '__main__':
>> +    QemuSystemTest.main()
>> -- 
>> 2.39.5
>>
>>
> 
> With regards,
> Daniel