On Mon, Nov 25, 2019 at 10:30:17AM +0000, Alexandru Elisei wrote: > kvmtool uses the Linux-only dt property 'linux,pci-probe-only' to prevent > it from trying to reprogram the BARs. Let's make the BARs writable so we > can get rid of this band-aid. For the sake of precision, PCI BARs are *always* writable and are indeed written in eg Linux kernel enumeration code regardless of what DT firmware property is present - in order to size them. This series - which is very welcome - allows something different, namely it allows changing the BARs value from a default address space configuration aka reassigning BARs in Linux kernel speak. Thanks, Lorenzo > Let's also extend the legacy PCI emulation, which came out in 1992, so we > can properly emulate the PCI Express version 1.1 protocol, which is > relatively newer, being published in 2005. > > With these two changes, we are very close to running EDK2 as the firmware > for the virtual machine; the only thing that is missing is flash emulation > for storing firmware variables. > > Summary of the patches: > * Patches 1-12 are fixes or enhancements needed to support reprogramable > BARs. > * Patches 13-15 add support for reprogramable BARs and remove the dt > property. > * Patch 16 adds support for PCIE 1.1. > > Based on the series at [1]. > > [1] https://lists.cs.columbia.edu/pipermail/kvmarm/2019-March/034964.html > > Alexandru Elisei (8): > Makefile: Use correct objcopy binary when cross-compiling for x86_64 > Remove pci-shmem device > Check that a PCI device's memory size is power of two > arm: pci.c: Advertise only PCI bus 0 in the DT > virtio/pci: Ignore MMIO and I/O accesses when they are disabled > Use independent read/write locks for ioport and mmio > virtio/pci: Add support for BAR configuration > Add PCI Express 1.1 support > > Julien Thierry (7): > ioport: pci: Move port allocations to PCI devices > pci: Fix ioport allocation size > arm/pci: Fix PCI IO region > arm/pci: Do not use first PCI IO space bytes for devices > virtio/pci: Make memory and IO BARs independent > vfio: Add support for BAR configuration > arm/fdt: Remove 'linux,pci-probe-only' property > > Sami Mujawar (1): > pci: Fix BAR resource sizing arbitration > > Makefile | 4 +- > arm/fdt.c | 1 - > arm/include/arm-common/kvm-arch.h | 2 +- > arm/include/arm-common/pci.h | 1 + > arm/kvm.c | 3 + > arm/pci.c | 28 ++- > builtin-run.c | 5 - > hw/pci-shmem.c | 400 ------------------------------ > hw/vesa.c | 21 +- > include/kvm/ioport.h | 4 - > include/kvm/pci-shmem.h | 32 --- > include/kvm/pci.h | 61 ++++- > include/kvm/util.h | 2 + > include/kvm/vesa.h | 6 +- > include/kvm/virtio-pci.h | 1 + > ioport.c | 36 +-- > mmio.c | 26 +- > pci.c | 64 ++++- > powerpc/include/kvm/kvm-arch.h | 2 +- > vfio/core.c | 6 +- > vfio/pci.c | 97 +++++++- > virtio/pci.c | 355 ++++++++++++++++++++------ > x86/include/kvm/kvm-arch.h | 2 +- > 23 files changed, 562 insertions(+), 597 deletions(-) > delete mode 100644 hw/pci-shmem.c > delete mode 100644 include/kvm/pci-shmem.h > > -- > 2.20.1 >
