From 2b10808539d7ace3d9b1226a71a68e2431ef2176 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Tue, 3 Apr 2018 15:05:45 +1000 Subject: Add host_memory_backend_pagesize() helper 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 Reviewed-by: Greg Kurz Acked-by: Paolo Bonzini --- backends/hostmem.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'backends') diff --git a/backends/hostmem.c b/backends/hostmem.c index f61093654e..6a0c474222 100644 --- a/backends/hostmem.c +++ b/backends/hostmem.c @@ -18,6 +18,7 @@ #include "qapi/visitor.h" #include "qemu/config-file.h" #include "qom/object_interfaces.h" +#include "qemu/mmap-alloc.h" #ifdef CONFIG_NUMA #include @@ -262,6 +263,23 @@ bool host_memory_backend_is_mapped(HostMemoryBackend *backend) return backend->is_mapped; } +#ifdef __linux__ +size_t host_memory_backend_pagesize(HostMemoryBackend *memdev) +{ + Object *obj = OBJECT(memdev); + char *path = object_property_get_str(obj, "mem-path", NULL); + size_t pagesize = qemu_mempath_getpagesize(path); + + g_free(path); + return pagesize; +} +#else +size_t host_memory_backend_pagesize(HostMemoryBackend *memdev) +{ + return getpagesize(); +} +#endif + static void host_memory_backend_memory_complete(UserCreatable *uc, Error **errp) { -- cgit v1.2.1