[Qemu-devel] [RHEL-8.1 virt 1/2] memory: Fix the memory region type assignment order

[Gary R Hook <ghook@redhat.com>]

BZ: 1667249
Branch: rhel-8.1.0
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1667249
Upstream Status: 4.0.0-rc1
Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=20980582
Conflicts: None

commit 2ddb89b00f947f785c9ca6742f28f954e3b75e62
Author: Singh, Brijesh <brijesh.singh@amd.com>
Date:   Mon Feb 4 22:23:39 2019 +0000

    memory: Fix the memory region type assignment order

    Currently, a callback registered through the RAMBlock notifier
    is not able to get the memory region type (i.e callback is not
    able to use memory_region_is_ram_device function). This is
    because mr->ram assignment happens _after_ the memory is allocated
    whereas the callback is executed during allocation.

    Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1667249
    Suggested-by: Alex Williamson <alex.williamson@redhat.com>
    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
    Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
    Message-Id: <20190204222322.26766-2-brijesh.singh@amd.com>
    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Cc: Paolo Bonzini <pbonzini@redhat.com> 
Cc: qemu-devel@nongnu.org 
---
 memory.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/memory.c b/memory.c
index 4974f972d5..04ff5e9108 100644
--- a/memory.c
+++ b/memory.c
@@ -1631,10 +1631,17 @@ void memory_region_init_ram_device_ptr(MemoryRegion *mr,
                                        uint64_t size,
                                        void *ptr)
 {
-    memory_region_init_ram_ptr(mr, owner, name, size, ptr);
+    memory_region_init(mr, owner, name, size);
+    mr->ram = true;
+    mr->terminates = true;
     mr->ram_device = true;
     mr->ops = &ram_device_mem_ops;
     mr->opaque = mr;
+    mr->destructor = memory_region_destructor_ram;
+    mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
+    /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL.  */
+    assert(ptr != NULL);
+    mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
 }
 
 void memory_region_init_alias(MemoryRegion *mr,
-- 
2.18.1