kernel/linux.git/drivers/cdx/Kconfig, branch v6.19.11

cdx: don't select CONFIG_GENERIC_MSI_IRQ

2025-08-27T18:14:12+00:00

x86 does not use CONFIG_GENERIC_MSI_IRQ, and trying to enable it anyway results in a build failure: In file included from include/linux/ssb/ssb.h:10, from drivers/ssb/pcihost_wrapper.c:18: include/linux/gpio/driver.h:41:33: error: field 'msiinfo' has incomplete type 41 | msi_alloc_info_t msiinfo; | ^~~~~~~ In file included from include/linux/kvm_host.h:19, from arch/x86/events/intel/core.c:17: include/linux/msi.h:528:33: error: field 'alloc_info' has incomplete type 528 | msi_alloc_info_t alloc_info; Change the driver to actually build without this symbol and remove the incorrect 'select' statements. Fixes: e8b18c11731d ("cdx: Fix missing GENERIC_MSI_IRQ on compile test") Reviewed-by: Robin Murphy Reviewed-by: Nikhil Agarwal Signed-off-by: Arnd Bergmann Signed-off-by: Nipun Gupta Link: https://lore.kernel.org/r/20250826043852.2206008-1-nipun.gupta@amd.com Signed-off-by: Alex Williamson

cdx: Fix missing GENERIC_MSI_IRQ on compile test

2025-07-16T12:17:31+00:00

CDX_BUS driver uses msi_setup_device_data() which is selected by GENERIC_MSI_IRQ, thus compile testing without the latter failed: /usr/bin/ld: drivers/cdx/cdx.o: in function `cdx_probe': build/drivers/cdx/cdx.c:314: undefined reference to `msi_setup_device_data' Reported-by: Randy Dunlap Closes: https://lore.kernel.org/all/b2c54a12-480c-448a-8b90-333cb03d9c14@infradead.org/ Fixes: 7f81907b7e3f ("cdx: Enable compile testing") Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250716064903.52397-2-krzysztof.kozlowski@linaro.org Signed-off-by: Greg Kroah-Hartman

cdx: Enable compile testing

2025-07-01T10:18:07+00:00

There is no code limited to ARM64 or OF/Devicetree in the CDX bus driver, so CDX_BUS can be compile tested on all platforms. CDX_CONTROLLER on the other hand selects REMOTEPROC which depends on HAS_DMA, so add that dependency for compile testing. Signed-off-by: Krzysztof Kozlowski Acked-by: Nikhil Agarwal Link: https://lore.kernel.org/r/20250502-cdx-clean-v3-1-6aaa5b369fc5@linaro.org Signed-off-by: Greg Kroah-Hartman

cdx: add MCDI protocol interface for firmware interaction

2023-03-29T10:26:32+00:00

The MCDI (Management CPU Driver Interface) is used as a protocol to communicate with the RPU firmware. It has pre-defined set of messages for different message exchanges between APU and RPU. Signed-off-by: Puneet Gupta Signed-off-by: Nipun Gupta Signed-off-by: Tarak Reddy Reviewed-by: Pieter Jansen van Vuuren Tested-by: Nikhil Agarwal Link: https://lore.kernel.org/r/20230313132636.31850-5-nipun.gupta@amd.com Signed-off-by: Greg Kroah-Hartman

cdx: add the cdx bus driver

2023-03-29T10:26:32+00:00

Introduce AMD CDX bus, which provides a mechanism for scanning and probing CDX devices. These devices are memory mapped on system bus for Application Processors(APUs). CDX devices can be changed dynamically in the Fabric and CDX bus interacts with CDX controller to rescan the bus and rediscover the devices. Signed-off-by: Nipun Gupta Reviewed-by: Pieter Jansen van Vuuren Tested-by: Nikhil Agarwal Link: https://lore.kernel.org/r/20230313132636.31850-2-nipun.gupta@amd.com Signed-off-by: Greg Kroah-Hartman