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pcie: Fast PCIe root ports for new machines 

Change the default speed and width for new machine types to the
fastest and widest currently supported.  This should be compatible to
the PCIe 4.0 spec.  Pre-QEMU-4.0 machine types remain at 2.5GT/s, x1
width.

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Alex Williamson 2018-12-12 12:40:09 -07:00 committed by Michael S. Tsirkin
parent d26e543891
commit a09d2038cc
2 changed files with 11 additions and 3 deletions
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4
hw/pci-bridge/gen_pcie_root_port.c
View File

@ -125,9 +125,9 @@ static Property gen_rp_props[] = {
DEFINE_PROP_SIZE("pref64-reserve", GenPCIERootPort,
res_reserve.mem_pref_64, -1),
DEFINE_PROP_PCIE_LINK_SPEED("x-speed", PCIESlot,
speed, PCIE_LINK_SPEED_2_5),
speed, PCIE_LINK_SPEED_16),
DEFINE_PROP_PCIE_LINK_WIDTH("x-width", PCIESlot,
width, PCIE_LINK_WIDTH_1),
width, PCIE_LINK_WIDTH_32),
DEFINE_PROP_END_OF_LIST()
};

10
include/hw/compat.h
View File

@ -2,7 +2,15 @@
#define HW_COMPAT_H
#define HW_COMPAT_3_1 \
/* empty */
{\
.driver = "pcie-root-port",\
.property = "x-speed",\
.value = "2_5",\
},{\
.driver = "pcie-root-port",\
.property = "x-width",\
.value = "1",\
},
#define HW_COMPAT_3_0 \
/* empty */