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authorMarc-André Lureau <marcandre.lureau@redhat.com>2018-09-06 20:14:15 +0400
committerPaolo Bonzini <pbonzini@redhat.com>2018-10-02 18:47:55 +0200
commit3829640049cf516d229620e5919b0ab66fd6ac86 (patch)
treeef5eb722c0fe8fd4ece5bf28bf0065374f98cdde /backends/hostmem-memfd.c
parent7184de64a1cf23a72191484b9a6995c3bfc9fb0b (diff)
hostmem-memfd: add checks before adding hostmem-memfd & properties
Run some memfd-related checks before registering hostmem-memfd & various properties. This will help libvirt to figure out what the host is supposed to be capable of. qemu_memfd_check() is changed to a less optimized version, since it is used with various flags, it no longer caches the result. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180906161415.8543-1-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'backends/hostmem-memfd.c')
-rw-r--r--backends/hostmem-memfd.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c
index 1e20fe0ba8..3800bd07b6 100644
--- a/backends/hostmem-memfd.c
+++ b/backends/hostmem-memfd.c
@@ -140,18 +140,22 @@ memfd_backend_class_init(ObjectClass *oc, void *data)
bc->alloc = memfd_backend_memory_alloc;
- object_class_property_add_bool(oc, "hugetlb",
- memfd_backend_get_hugetlb,
- memfd_backend_set_hugetlb,
- &error_abort);
- object_class_property_add(oc, "hugetlbsize", "int",
- memfd_backend_get_hugetlbsize,
- memfd_backend_set_hugetlbsize,
- NULL, NULL, &error_abort);
- object_class_property_add_bool(oc, "seal",
- memfd_backend_get_seal,
- memfd_backend_set_seal,
- &error_abort);
+ if (qemu_memfd_check(MFD_HUGETLB)) {
+ object_class_property_add_bool(oc, "hugetlb",
+ memfd_backend_get_hugetlb,
+ memfd_backend_set_hugetlb,
+ &error_abort);
+ object_class_property_add(oc, "hugetlbsize", "int",
+ memfd_backend_get_hugetlbsize,
+ memfd_backend_set_hugetlbsize,
+ NULL, NULL, &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);
+ }
}
static const TypeInfo memfd_backend_info = {
@@ -164,7 +168,9 @@ static const TypeInfo memfd_backend_info = {
static void register_types(void)
{
- type_register_static(&memfd_backend_info);
+ if (qemu_memfd_check(0)) {
+ type_register_static(&memfd_backend_info);
+ }
}
type_init(register_types);