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| author | Ilya Maximets <i.maximets@samsung.com> | 2019-03-11 16:58:47 +0300 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2019-03-11 17:16:56 -0300 |
| commit | 4a66c7a9996bb1bb1191170b172daa54e226d7ff (patch) | |
| tree | ffc86e58bff453e6cd3bc64621426c7baf7580a5 /backends | |
| parent | f6a0d06ba72a0c493e1e05872caf2f3781af316d (diff) | |
| download | qemu-4a66c7a9996bb1bb1191170b172daa54e226d7ff.zip qemu-4a66c7a9996bb1bb1191170b172daa54e226d7ff.tar.gz qemu-4a66c7a9996bb1bb1191170b172daa54e226d7ff.tar.bz2 | |
hostmem-memfd: disable for systems without sealing support
If seals are not supported, memfd_create() will fail.
Furthermore, there is no way to disable it in this case because
'.seal' property is not registered.
This issue leads to vhost-user-test failures on RHEL 7.2:
qemu-system-x86_64: -object memory-backend-memfd,id=mem,size=2M,: \
failed to create memfd: Invalid argument
and actually breaks the feature on such systems.
Let's restrict memfd backend to systems with sealing support.
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Message-Id: <20190311135850.6537-2-i.maximets@samsung.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/hostmem-memfd.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c index 98c9bf3..46b15b9 100644 --- a/backends/hostmem-memfd.c +++ b/backends/hostmem-memfd.c @@ -154,15 +154,13 @@ memfd_backend_class_init(ObjectClass *oc, void *data) "Huge pages size (ex: 2M, 1G)", &error_abort); } - if (qemu_memfd_check(MFD_ALLOW_SEALING)) { - object_class_property_add_bool(oc, "seal", - memfd_backend_get_seal, - memfd_backend_set_seal, - &error_abort); - object_class_property_set_description(oc, "seal", - "Seal growing & shrinking", - &error_abort); - } + object_class_property_add_bool(oc, "seal", + memfd_backend_get_seal, + memfd_backend_set_seal, + &error_abort); + object_class_property_set_description(oc, "seal", + "Seal growing & shrinking", + &error_abort); } static const TypeInfo memfd_backend_info = { @@ -175,7 +173,7 @@ static const TypeInfo memfd_backend_info = { static void register_types(void) { - if (qemu_memfd_check(0)) { + if (qemu_memfd_check(MFD_ALLOW_SEALING)) { type_register_static(&memfd_backend_info); } } |