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authorMarcel Apfelbaum <marcel@redhat.com>2017-12-13 16:37:37 +0200
committerMarcel Apfelbaum <marcel@redhat.com>2018-02-19 13:03:24 +0200
commit06329ccecfa022494fdba288b3ab5bcb8dff4159 (patch)
tree6ac05bd91e27d422a5e7d4e1804d626f17216e8e /memory.c
parente5ecc287a7bd24a1364e23e263cb60cfc8d21eb5 (diff)
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mem: add share parameter to memory-backend-ram
Currently only file backed memory backend can be created with a "share" flag in order to allow sharing guest RAM with other processes in the host. Add the "share" flag also to RAM Memory Backend in order to allow remapping parts of the guest RAM to different host virtual addresses. This is needed by the RDMA devices in order to remap non-contiguous QEMU virtual addresses to a contiguous virtual address range. Moved the "share" flag to the Host Memory base class, modified phys_mem_alloc to include the new parameter and a new interface memory_region_init_ram_shared_nomigrate. There are no functional changes if the new flag is not used. Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Diffstat (limited to 'memory.c')
-rw-r--r--memory.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/memory.c b/memory.c
index c7f6588..6515131 100644
--- a/memory.c
+++ b/memory.c
@@ -1539,11 +1539,21 @@ void memory_region_init_ram_nomigrate(MemoryRegion *mr,
uint64_t size,
Error **errp)
{
+ memory_region_init_ram_shared_nomigrate(mr, owner, name, size, false, errp);
+}
+
+void memory_region_init_ram_shared_nomigrate(MemoryRegion *mr,
+ Object *owner,
+ const char *name,
+ uint64_t size,
+ bool share,
+ Error **errp)
+{
memory_region_init(mr, owner, name, size);
mr->ram = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
- mr->ram_block = qemu_ram_alloc(size, mr, errp);
+ mr->ram_block = qemu_ram_alloc(size, share, mr, errp);
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
}
@@ -1654,7 +1664,7 @@ void memory_region_init_rom_nomigrate(MemoryRegion *mr,
mr->readonly = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
- mr->ram_block = qemu_ram_alloc(size, mr, errp);
+ mr->ram_block = qemu_ram_alloc(size, false, mr, errp);
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
}
@@ -1673,7 +1683,7 @@ void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
mr->terminates = true;
mr->rom_device = true;
mr->destructor = memory_region_destructor_ram;
- mr->ram_block = qemu_ram_alloc(size, mr, errp);
+ mr->ram_block = qemu_ram_alloc(size, false, mr, errp);
}
void memory_region_init_iommu(void *_iommu_mr,