Re: [PATCH v14 09/15] PCI: endpoint: pci-epf-test: Add doorbell test support

base: 00f3246adeeacbda0bd0b303604e46eb59c32e6e patch link: https://lore.kernel.org/r/20250207-ep-msi-v14-9-9671b136f2b8%40nxp.com patch subject: [PATCH v14 09/15] PCI: endpoint: pci-epf-test: Add doorbell test support config: i386-buildonly-randconfig-003-20250208 (https://download.01.org

[PATCH v14 09/15] PCI: endpoint: pci-epf-test: Add doorbell test support

Add three registers: doorbell_bar, doorbell_addr, and doorbell_data. Use pci_epf_alloc_doorbell() to allocate a doorbell address space. Enable the Root Complex (RC) side driver to trigger pci-epc-test's doorbell callback handler by writing doorbell_data to the mapped doorbell_bar's address space.