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fw_cfg: add write callback

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Reintroduce the write callback that was removed when write support was
removed in commit 023e314856.

Contrary to the previous callback implementation, the write_cb
callback is called whenever a write happened, so handlers must be
ready to handle partial write as necessary.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2017-09-11 18:59:23 +02:00 • committed by Michael S. Tsirkin
parent 06592d7e28
commit 5f9252f7cc
6 changed files with 18 additions and 9 deletions
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2
hw/i386/acpi-build.c
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@ -2911,7 +2911,7 @@ void acpi_setup(void)
build_state->rsdp = g_memdup(tables.rsdp->data, rsdp_size);
fw_cfg_add_file_callback(pcms->fw_cfg, ACPI_BUILD_RSDP_FILE,
acpi_build_update, build_state,
acpi_build_update, NULL, build_state,
build_state->rsdp, rsdp_size, true);
build_state->rsdp_mr = NULL;
} else {