[PATCH 7/9] add debuging facilities to memory registration at libkvm

[Glauber Costa <glommer@redhat.com>]

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
 libkvm/libkvm.c |   16 +++++++++++++---
 1 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/libkvm/libkvm.c b/libkvm/libkvm.c
index 5df201e..8764982 100644
--- a/libkvm/libkvm.c
+++ b/libkvm/libkvm.c
@@ -52,6 +52,8 @@
 #include "kvm-s390.h"
 #endif
 
+//#define DEBUG_MEMREG
+
 int kvm_abi = EXPECTED_KVM_API_VERSION;
 int kvm_page_size;
 
@@ -186,7 +188,7 @@ int kvm_register_mmio_slot(kvm_context_t kvm, uint64_t phys_addr, unsigned int s
                goto out;
 
 #ifdef DEBUG_MEMREG
-	printf("Registering mmio region %llx (%lx)\n", phys_addr, size);
+	fprintf(stderr, "Registering mmio region %llx (%lx)\n", phys_addr, size);
 #endif
        mmio_slots[slot].phys_addr = phys_addr;
        mmio_slots[slot].len = size;
@@ -509,6 +511,11 @@ int kvm_register_phys_mem(kvm_context_t kvm,
 	int r;
 
 	memory.slot = get_free_slot(kvm);
+#ifdef DEBUG_MEMREG
+	fprintf(stderr, "%s, memory: gpa: %llx, size: %llx, uaddr: %llx, slot: %x, flags: %lx\n",
+		__func__, memory.guest_phys_addr, memory.memory_size,
+		memory.userspace_addr, memory.slot, memory.flags);
+#endif
 	r = ioctl(kvm->vm_fd, KVM_SET_USER_MEMORY_REGION, &memory);
 	if (r == -1) {
 		fprintf(stderr, "create_userspace_phys_mem: %s\n", strerror(errno));
@@ -567,7 +574,7 @@ void kvm_unregister_memory_area(kvm_context_t kvm, uint64_t phys_addr, unsigned
 
        if (slot != -1) {
 #ifdef DEBUG_MEMREG
-               printf("Unregistering memory region %llx (%lx)\n", phys_addr, size);
+		fprintf(stderr, "Unregistering memory region %llx (%lx)\n", phys_addr, size);
 #endif
                kvm_destroy_phys_mem(kvm, phys_addr, size);
                return;
@@ -576,7 +583,7 @@ void kvm_unregister_memory_area(kvm_context_t kvm, uint64_t phys_addr, unsigned
        slot = get_container_mmio_slot(kvm, phys_addr, size);
        if (slot != -1) {
 #ifdef DEBUG_MEMREG
-               printf("Unregistering mmio region %llx (%lx)\n", phys_addr, size);
+		fprintf(stderr, "Unregistering mmio region %llx (%lx)\n", phys_addr, size);
 #endif
                kvm_unregister_coalesced_mmio(kvm, phys_addr, size);
                mmio_slots[slot].len = 0;
@@ -1072,6 +1079,9 @@ int kvm_unregister_coalesced_mmio(kvm_context_t kvm, uint64_t addr, uint32_t siz
 			perror("kvm_unregister_coalesced_mmio_zone");
 			return -errno;
 		}
+#ifdef DEBUG_MEMREG
+		fprintf(stderr, "Unregistered coalesced mmio region for %llx (%lx)\n", addr, size);
+#endif
 		return 0;
 	}
 #endif
-- 
1.5.5.1