Re: [Qemu-devel] [PATCH qemu v7 3/4] vfio-pci: Allow mmap of MSIX BAR

2018-02-12 Thread David Gibson
On Fri, Feb 09, 2018 at 06:55:02PM +1100, Alexey Kardashevskiy wrote: > At the moment we unconditionally avoid mapping MSIX data of a BAR and > emulate MSIX table in QEMU. However it is 1) not always necessary as > a platform may prodive a paravirt interface for MSIX configuration; > 2) can affect

[Qemu-devel] [PATCH qemu v7 3/4] vfio-pci: Allow mmap of MSIX BAR

2018-02-08 Thread Alexey Kardashevskiy
At the moment we unconditionally avoid mapping MSIX data of a BAR and emulate MSIX table in QEMU. However it is 1) not always necessary as a platform may prodive a paravirt interface for MSIX configuration; 2) can affect the speed of MMIO access by emulating them in QEMU when frequently accessed re