Without mmu notifiers usage of hugepages to back guest memory can cause memory corruption.
Signed-off-by: Marcelo Tosatti <[email protected]> diff --git a/qemu/vl.c b/qemu/vl.c index d0660ab..49cf066 100644 --- a/qemu/vl.c +++ b/qemu/vl.c @@ -4664,6 +4664,11 @@ void *alloc_mem_area(size_t memory, unsigned long *len, const char *path) void *area; int fd; + if (!kvm_has_sync_mmu()) { + fprintf(stderr, "host lacks mmu notifiers, disabling --mem-path\n"); + return NULL; + } + if (asprintf(&filename, "%s/kvm.XXXXXX", path) == -1) return NULL; -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
