Some CPU like x86 processor has two address spaces. One for memory and one for IO. And different instructions to access them. And the PCI 3.0 spec al ...

In linux-5.15.68 source tree, I tried to search for the definition of function 'pci_write_config_dword' and this was calling 'pci_bus_write_config_dwo ...

I am trying to implement a minimal hypervisor on ARMv8A (Cortext A53 on QEMU Version 6.2.0).I have written a minimal hypervisor code in EL2 and the Li ...

I'm trying to reading PCI CSR (Configuration Space Register) on my system via open,mmap /dev/mem. I met some problems when using 8 byte length readin ...

I have a student task to read PCI info via 0xCF8 and 0xCFC ports using outl(), inl() functions. It assumes I use Linux x86, but can I do such things o ...

This is the PCI CONFIG_ADDRESS register from http://pds5.egloos.com/pds/200709/07/88/pci21.pdf : It shows the register number as bits [7-2]. This t ...

I have couple of doubts regarding PCIe device configuration, Generally a PCIe device is uniquely identify with BDF (BUS DEVICE FUNCTION), As per my un ...

I've been programming a Linux kernel module for several years for a PCIe device. One of the main feature is to transfer data from the PCIe card to the ...

pci is an io device because we can use I/O instructions to read and write its registers to I/O ports(0xCF8~0xCFC), it connected to the system bus. pci ...

I was creating some drivers and I found my self stuck in the IRQ Pins, my kernel uses IOAPIC and I don't know how this interrupt mechanism (IRQ Pins) ...

We scanned our website for vulnerabilities and received the message shown below. We used Clover Security to scan the Azure Web App site. We have alrea ...

Why can't openstack's virtual machine unbind/detach PCI devices such as GPU? After I created a virtual machine in openstack using flavor with GPU dev ...

Operating System: RHEL Centos 7.9 Latest Operation: Sending 500MB chunks 21 times from one System to another connected via Mellanox Cables. (Ethernet ...

I came across the LWN article "Manual driver binding and unbinding", where it explains how to use the sysfs interface to dynamically bind and unbind d ...

Are PS/2 devices like old-style mice and keyboard are port mapped I/O devices? Are there any PCI or USB devices which can be functioning as port mappe ...

How to identify the device by pci capability id? this is my code: I try to access 34h and check if the capability id exists on the first loop If it e ...

I emulate big endian linux by qemu-system-aarch64 with '-device virtio-net-pci' running at a little endian, and get the following error when i run dpd ...

Here's the scenario: I've got 2 subnets. 1 is PCI DSS Compliant and the other one is not. Can I extract data to process on Kafka from the PCI complian ...

I'm trying to write assembly to access pci configuration space. what I'm trying to do is basically what this article does. https://sites.google.com/ ...

Lots of Linux book said that "everything is a file", they also said that "you can treat I/O device as a spcial file/device file." For HDA device, ...