This patch series extends the recently added 8-byte PCI load/store support to the x86 architecture. Refer patch series adding above support: https://lore.kernel.org/all/20240522150651.1999584-1-gbayer@xxxxxxxxxxxxx/ The 8-byte implementations are enclosed inside #ifdef checks of the macros "ioread64" and "iowrite64". These macros don't get defined if CONFIG_GENERIC_IOMAP is defined. CONFIG_GENERIC_IOMAP gets defined for x86 and hence the macros are undefined. Due to this the 8-byte support was not enabled for x86 architecture. To resolve this, include the header file io-64-nonatomic-lo-hi.h that maps the ioread64 and iowrite64 macros to a generic implementation in lib/iomap.c. This was the intention of defining CONFIG_GENERIC_IOMAP. Tested using a pass-through PCI device bound to vfio-pci driver and doing BAR reads and writes that trigger calls to vfio_pci_core_do_io_rw() that does the 8-byte reads and writes. Patch history: v3: Do not add the check for CONFIG_64BIT and only remove the checks for ioread64 and iowrite64. v2: Based on Jason's feedback moved #include io-64-nonatomic-lo-hi.h to vfio_pci_rdwr.c and replaced #ifdef checks of iowrite64 and ioread64 macros with checks for CONFIG_64BIT. https://lore.kernel.org/all/20240522232125.548643-1-ramesh.thomas@xxxxxxxxx/ https://lore.kernel.org/all/20240524140013.GM69273@xxxxxxxx/ https://lore.kernel.org/all/bfb273b2-fc5e-4a8b-a40d-56996fc9e0af@xxxxxxxxx/ Ramesh Thomas (2): vfio/pci: Enable iowrite64 and ioread64 for vfio pci vfio/pci: Remove #ifdef iowrite64 and #ifdef ioread64 drivers/vfio/pci/vfio_pci_rdwr.c | 13 +------------ 1 file changed, 1 insertion(+), 12 deletions(-) -- 2.34.1
