[Qemu-devel] [PATCH] de-register mem region for MMIO.

[Glauber Costa <glommer@redhat.com>]

Besides unassigned memory, we also don't care about MMIO.
So if we're giving an MMIO area that is already registered,
wipe it out.

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
 kvm-all.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c
index 4379071..6d50609 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -317,7 +317,8 @@ void kvm_set_phys_mem(target_phys_addr_t start_addr,
 
     mem = kvm_lookup_slot(s, start_addr);
     if (mem) {
-        if (flags == IO_MEM_UNASSIGNED) {
+        if ((flags == IO_MEM_UNASSIGNED) || (flags >= TLB_MMIO)) {
+            dprintf("deleting memory %llx with flags %d\n", mem->guest_phys_addr, mem->flags);
             mem->memory_size = 0;
             mem->guest_phys_addr = start_addr;
             mem->userspace_addr = 0;
-- 
1.5.6.5