[Qemu-devel] [PATCH for-4.1] target/i386: sev: Do not unpin ram device memory region

[Alex Williamson]

The commit referenced below skipped pinning ram device memory when
ram blocks are added, we need to do the same when they're removed.

Cc: Brijesh Singh <brijesh.si...@amd.com>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Fixes: cedc0ad539af ("target/i386: sev: Do not pin the ram device memory 
region")
Signed-off-by: Alex Williamson <alex.william...@redhat.com>
---
 target/i386/sev.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/target/i386/sev.c b/target/i386/sev.c
index 6dbdc3cdf10f..5ba1384ea1f6 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -161,6 +161,17 @@ sev_ram_block_removed(RAMBlockNotifier *n, void *host, 
size_t size)
 {
     int r;
     struct kvm_enc_region range;
+    ram_addr_t offset;
+    MemoryRegion *mr;
+
+    /*
+     * The RAM device presents a memory region that should be treated
+     * as IO region and should not have been pinned.
+     */
+    mr = memory_region_from_host(host, &offset);
+    if (mr && memory_region_is_ram_device(mr)) {
+        return;
+    }
 
     range.addr = (__u64)(unsigned long)host;
     range.size = size;