fw-cfg: support writeable blobs
Useful to send guest data back to QEMU.
Changes from Laszlo Ersek <lersek@redhat.com>:
- rebase the patch from Michael Tsirkin's original postings at [1] and [2]
to the following patches:
- loader: Allow a custom AddressSpace when loading ROMs
- loader: Add AddressSpace loading support to uImages
- loader: fix handling of custom address spaces when adding ROM blobs
- reject such writes immediately that would exceed the end of the array,
rather than performing a partial write before setting the error bit: see
the (len != dma.length) condition
- document the write interface
[1] http://lists.nongnu.org/archive/html/qemu-devel/2016-02/msg04968.html
[2] http://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg02735.html
Cc: "Gabriel L. Somlo" <somlo@cmu.edu>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Michael Walle <michael@walle.cc>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Shannon Zhao <zhaoshenglong@huawei.com>
Cc: qemu-arm@nongnu.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Acked-by: Gabriel Somlo <somlo@cmu.edu>
Tested-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
diff --git a/include/hw/loader.h b/include/hw/loader.h
index 0c864cf..0dbd8d6 100644
--- a/include/hw/loader.h
+++ b/include/hw/loader.h
@@ -180,7 +180,8 @@
size_t max_len, hwaddr addr,
const char *fw_file_name,
FWCfgReadCallback fw_callback,
- void *callback_opaque, AddressSpace *as);
+ void *callback_opaque, AddressSpace *as,
+ bool read_only);
int rom_add_elf_program(const char *name, void *data, size_t datasize,
size_t romsize, hwaddr addr, AddressSpace *as);
int rom_check_and_register_reset(void);
@@ -194,7 +195,7 @@
#define rom_add_file_fixed(_f, _a, _i) \
rom_add_file(_f, NULL, _a, _i, false, NULL, NULL)
#define rom_add_blob_fixed(_f, _b, _l, _a) \
- rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, NULL)
+ rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, NULL, true)
#define rom_add_file_mr(_f, _mr, _i) \
rom_add_file(_f, NULL, 0, _i, false, _mr, NULL)
#define rom_add_file_as(_f, _as, _i) \
@@ -202,7 +203,7 @@
#define rom_add_file_fixed_as(_f, _a, _i, _as) \
rom_add_file(_f, NULL, _a, _i, false, NULL, _as)
#define rom_add_blob_fixed_as(_f, _b, _l, _a, _as) \
- rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, _as)
+ rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, _as, true)
#define PC_ROM_MIN_VGA 0xc0000
#define PC_ROM_MIN_OPTION 0xc8000
