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Add host_memory_backend_pagesize() helper

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There are a couple places (one generic, one target specific) where we need
to get the host page size associated with a particular memory backend.  I
have some upcoming code which will add another place which wants this.  So,
for convenience, add a helper function to calculate this.

host_memory_backend_pagesize() returns the host pagesize for a given
HostMemoryBackend object.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Gibson 2018-04-03 15:05:45 +10:00
parent 0de6e2a3ca
commit 2b10808539
4 changed files with 23 additions and 8 deletions
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6
target/ppc/kvm.c
View file

@ -496,11 +496,7 @@ static void kvm_fixup_page_sizes(PowerPCCPU *cpu)
bool kvmppc_is_mem_backend_page_size_ok(const char *obj_path)
{
Object *mem_obj = object_resolve_path(obj_path, NULL);
char *mempath = object_property_get_str(mem_obj, "mem-path", NULL);
long pagesize;
pagesize = qemu_mempath_getpagesize(mempath);
g_free(mempath);
long pagesize = host_memory_backend_pagesize(MEMORY_BACKEND(mem_obj));
return pagesize >= max_cpu_page_size;
}