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| author | David Gibson <david@gibson.dropbear.id.au> | 2018-04-03 15:05:45 +1000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2018-04-27 18:05:22 +1000 |
| commit | 2b10808539d7ace3d9b1226a71a68e2431ef2176 (patch) | |
| tree | 07bc8d753d710a7217bdd6ec69b59b89f417dab7 /backends | |
| parent | 0de6e2a3ca2e1215a2d62d8d796589d27eca91d0 (diff) | |
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 <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/hostmem.c | 18 |
1 files changed, 18 insertions, 0 deletions
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 <numaif.h> @@ -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) { |