[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v5 10/12] stubs: add qemu_ram_block_from_host() and qemu_ram_get_
From: |
Stefan Hajnoczi |
Subject: |
[PATCH v5 10/12] stubs: add qemu_ram_block_from_host() and qemu_ram_get_fd() |
Date: |
Tue, 27 Sep 2022 15:34:29 -0400 |
The blkio block driver will need to look up the file descriptor for a
given pointer. This is possible in softmmu builds where the RAMBlock API
is available for querying guest RAM.
Add stubs so tools like qemu-img that link the block layer still build
successfully. In this case there is no guest RAM but that is fine.
Bounce buffers and their file descriptors will be allocated with
libblkio's blkio_alloc_mem_region() so we won't rely on QEMU's
qemu_ram_get_fd() in that case.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
stubs/physmem.c | 13 +++++++++++++
stubs/meson.build | 1 +
2 files changed, 14 insertions(+)
create mode 100644 stubs/physmem.c
diff --git a/stubs/physmem.c b/stubs/physmem.c
new file mode 100644
index 0000000000..1fc5f2df29
--- /dev/null
+++ b/stubs/physmem.c
@@ -0,0 +1,13 @@
+#include "qemu/osdep.h"
+#include "exec/cpu-common.h"
+
+RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
+ ram_addr_t *offset)
+{
+ return NULL;
+}
+
+int qemu_ram_get_fd(RAMBlock *rb)
+{
+ return -1;
+}
diff --git a/stubs/meson.build b/stubs/meson.build
index d8f3fd5c44..4314161f5f 100644
--- a/stubs/meson.build
+++ b/stubs/meson.build
@@ -29,6 +29,7 @@ stub_ss.add(files('migr-blocker.c'))
stub_ss.add(files('module-opts.c'))
stub_ss.add(files('monitor.c'))
stub_ss.add(files('monitor-core.c'))
+stub_ss.add(files('physmem.c'))
stub_ss.add(files('qemu-timer-notify-cb.c'))
stub_ss.add(files('qmp_memory_device.c'))
stub_ss.add(files('qmp-command-available.c'))
--
2.37.3
- [PATCH v5 02/12] blkio: add libblkio block driver, (continued)
- [PATCH v5 02/12] blkio: add libblkio block driver, Stefan Hajnoczi, 2022/09/27
- [PATCH v5 03/12] numa: call ->ram_block_removed() in ram_block_notifer_remove(), Stefan Hajnoczi, 2022/09/27
- [PATCH v5 05/12] block: use BdrvRequestFlags type for supported flag fields, Stefan Hajnoczi, 2022/09/27
- [PATCH v5 04/12] block: pass size to bdrv_unregister_buf(), Stefan Hajnoczi, 2022/09/27
- [PATCH v5 06/12] block: add BDRV_REQ_REGISTERED_BUF request flag, Stefan Hajnoczi, 2022/09/27
- [PATCH v5 07/12] block: return errors from bdrv_register_buf(), Stefan Hajnoczi, 2022/09/27
- [PATCH v5 08/12] block: add BlockRAMRegistrar, Stefan Hajnoczi, 2022/09/27
- [PATCH v5 09/12] exec/cpu-common: add qemu_ram_get_fd(), Stefan Hajnoczi, 2022/09/27
- [PATCH v5 10/12] stubs: add qemu_ram_block_from_host() and qemu_ram_get_fd(),
Stefan Hajnoczi <=
- [PATCH v5 11/12] blkio: implement BDRV_REQ_REGISTERED_BUF optimization, Stefan Hajnoczi, 2022/09/27
- [PATCH v5 12/12] virtio-blk: use BDRV_REQ_REGISTERED_BUF optimization hint, Stefan Hajnoczi, 2022/09/27