* when we actually open and map them. Iterate over the file
* descriptors instead, and use qemu_fd_getpagesize().
*/
-static int find_max_supported_pagesize(Object *obj, void *opaque)
+static int find_min_backend_pagesize(Object *obj, void *opaque)
{
long *hpsize_min = opaque;
return 0;
}
-long qemu_getrampagesize(void)
+static int find_max_backend_pagesize(Object *obj, void *opaque)
+{
+ long *hpsize_max = opaque;
+
+ if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
+ HostMemoryBackend *backend = MEMORY_BACKEND(obj);
+ long hpsize = host_memory_backend_pagesize(backend);
+
+ if (host_memory_backend_is_mapped(backend) && (hpsize > *hpsize_max)) {
+ *hpsize_max = hpsize;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * TODO: We assume right now that all mapped host memory backends are
+ * used as RAM, however some might be used for different purposes.
+ */
+long qemu_minrampagesize(void)
{
long hpsize = LONG_MAX;
long mainrampagesize;
*/
memdev_root = object_resolve_path("/objects", NULL);
if (memdev_root) {
- object_child_foreach(memdev_root, find_max_supported_pagesize, &hpsize);
+ object_child_foreach(memdev_root, find_min_backend_pagesize, &hpsize);
}
if (hpsize == LONG_MAX) {
/* No additional memory regions found ==> Report main RAM page size */
return hpsize;
}
+
+long qemu_maxrampagesize(void)
+{
+ long pagesize = qemu_mempath_getpagesize(mem_path);
+ Object *memdev_root = object_resolve_path("/objects", NULL);
+
+ if (memdev_root) {
+ object_child_foreach(memdev_root, find_max_backend_pagesize,
+ &pagesize);
+ }
+ return pagesize;
+}
#else
-long qemu_getrampagesize(void)
+long qemu_minrampagesize(void)
+{
+ return getpagesize();
+}
+long qemu_maxrampagesize(void)
{
return getpagesize();
}
warn_report("Many guests require at least 64kiB hpt-max-page-size");
}
- spapr_check_pagesize(spapr, qemu_getrampagesize(), errp);
+ spapr_check_pagesize(spapr, qemu_minrampagesize(), errp);
}
static bool spapr_pagesize_cb(void *opaque, uint32_t seg_pshift,
uint8_t mps;
if (kvmppc_hpt_needs_host_contiguous_pages()) {
- mps = ctz64(qemu_getrampagesize());
+ mps = ctz64(qemu_minrampagesize());
} else {
mps = 34; /* allow everything up to 16GiB, i.e. everything */
}
* Configure the maximum page size. As no memory devices were created
* yet, this is the page size of initial memory only.
*/
- s390_set_max_pagesize(qemu_getrampagesize(), &local_err);
+ s390_set_max_pagesize(qemu_maxrampagesize(), &local_err);
if (local_err) {
error_report_err(local_err);
exit(EXIT_FAILURE);
uint64_t pagesize = memory_region_iommu_get_min_page_size(iommu_mr);
unsigned entries, bits_total, bits_per_level, max_levels;
struct vfio_iommu_spapr_tce_create create = { .argsz = sizeof(create) };
- long rampagesize = qemu_getrampagesize();
+ long rampagesize = qemu_minrampagesize();
/*
* The host might not support the guest supported IOMMU page size,
/* Find the largest hardware supported page size that's less than
* or equal to the (logical) backing page size of guest RAM */
kvm_get_smmu_info(&info, &error_fatal);
- rampagesize = qemu_getrampagesize();
+ rampagesize = qemu_minrampagesize();
best_page_shift = 0;
for (i = 0; i < KVM_PPC_PAGE_SIZES_MAX_SZ; i++) {