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Date: Fri, 17 Feb 2017 14:21:32 -0800 From: lex000luthor <lex000luthor@...il.com> To: linux-kernel@...r.kernel.org Subject: Userspace mmap to PCI is failing Hello, I am trying to mmap a PCI device, but it fails with EINVAL. <snip> ... fd = open("/dev/mem", O_RDWR | O_SYNC); ... rv = mmap64(0, size, PROT_READ, MAP_SHARED, fd, pci_addr); ... <snip> The pci_addr is the address obtained from lspci output which is a 64 bit address. The pci_addr has a value of 0x121ffb000000, is that weird? Kernel is 3.4.10 64 bit and User space is 32 bit. regards, Lex
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