Add sysctls to display the total and free amount of hard-wired mem for VMs

   # sysctl hw.vmm
   hw.vmm.mem_free: 2145386496
   hw.vmm.mem_total: 2145386496

Submitted by:	Takeshi HASEGAWA hasegaw at gmail com

2 files changed, 26 insertions, 0 deletions

diff --git a/lib/libvmmapi/vmmapi.c b/lib/libvmmapi/vmmapi.c
index 5882bd2..d7e6143 100644
--- a/lib/libvmmapi/vmmapi.c
+++ b/lib/libvmmapi/vmmapi.c
@@ -117,6 +117,30 @@ vm_destroy(struct vmctx *vm)
 	free(vm);
 }
 
+size_t
+vmm_get_mem_total(void)
+{
+	size_t mem_total = 0;
+	size_t oldlen = sizeof(mem_total);
+	int error;
+	error = sysctlbyname("hw.vmm.mem_total", &mem_total, &oldlen, NULL, 0);
+	if (error)
+		return -1;
+	return mem_total;
+}
+
+size_t
+vmm_get_mem_free(void)
+{
+	size_t mem_free = 0;
+	size_t oldlen = sizeof(mem_free);
+	int error;
+	error = sysctlbyname("hw.vmm.mem_free", &mem_free, &oldlen, NULL, 0);
+	if (error)
+		return -1;
+	return mem_free;
+}
+
 int
 vm_get_memory_seg(struct vmctx *ctx, vm_paddr_t gpa,
 		  vm_paddr_t *ret_hpa, size_t *ret_len)
diff --git a/lib/libvmmapi/vmmapi.h b/lib/libvmmapi/vmmapi.h
index de3d4b7..516bbc3 100644
--- a/lib/libvmmapi/vmmapi.h
+++ b/lib/libvmmapi/vmmapi.h
@@ -34,6 +34,8 @@ struct vmctx;
 int	vm_create(const char *name);
 struct vmctx *vm_open(const char *name);
 void	vm_destroy(struct vmctx *ctx);
+size_t	vmm_get_mem_total(void);
+size_t	vmm_get_mem_free(void);
 int	vm_get_memory_seg(struct vmctx *ctx, vm_paddr_t gpa,
 			  vm_paddr_t *ret_hpa, size_t *ret_len);
 /*