On 08/01/2026 04.30, Zhao Liu wrote:
From: Philippe Mathieu-Daudé <philmd@linaro.org>
Now all calls of x86 machines to fw_cfg_init_io_dma() pass DMA arguments, so the FWCfgState (FWCfgIoState) created by x86 machines enables DMA by default.
Although other callers of fw_cfg_init_io_dma() besides x86 also pass DMA arguments to create DMA-enabled FwCfgIoState, the "dma_enabled" property of FwCfgIoState cannot yet be removed, because Sun4u and Sun4v still create DMA-disabled FwCfgIoState (bypass fw_cfg_init_io_dma()) in sun4uv_init() (hw/sparc64/sun4u.c).
Maybe reusing fw_cfg_init_io_dma() for them would be a better choice, or adding fw_cfg_init_io_nodma(). However, before that, first simplify the handling of FwCfgState in x86.
Considering that FwCfgIoState in x86 enables DMA by default, remove the handling for DMA-disabled cases and replace DMA checks with assertions to ensure that the default DMA-enabled setting is not broken.
Then 'linuxboot.bin' isn't used anymore, and it will be removed in the next commit.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Zhao Liu <zhao1.liu@intel.com> Acked-by: Igor Mammedov <imammedo@redhat.com> --- Changes since v4: * Keep "dma_enabled" property in fw_cfg_io_properties[]. * Replace DMA checks with assertions for x86 machines. --- hw/i386/fw_cfg.c | 16 ++++++++-------- hw/i386/x86-common.c | 6 ++---- 2 files changed, 10 insertions(+), 12 deletions(-)
Reviewed-by: Thomas Huth <thuth@redhat.com>