aiberia

diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
index f3c7b9d328..438b0a7bc0 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -228,11 +228,11 @@ pcie_cap_v1_fill(PCIDevice *dev, uint8_t port, uint8_t type, uint8_t version)
     pci_set_long(exp_cap + PCI_EXP_LNKCAP,
                  (port << PCI_EXP_LNKCAP_PN_SHIFT) |
                  PCI_EXP_LNKCAP_ASPMS_0S |
-                 PCI_EXP_LNK_MLW_16 |
+                 PCI_EXP_LNK_MLW_8 |

aiberia

Bench 1, Q35 Unpatched, root port: 1B36:000C
Lspci: x8/1.0, Nvidia: x1

  3DMark Time Spy:
    4009 4503
    3996 4549
    3999 4564

Bench 2, Q35 Unmodified patch [x16], root port: 1B36:000C     
Lspci: x8/3.0, Nvidia: Unknown bus      

aiberia

import evdev
import sys

device = evdev.InputDevice(sys.argv[1])
print(device)

for event in device.read_loop():
    print(evdev.categorize(event))

aiberia

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 44c4ae1abd00..27840129e4b0 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3433,6 +3433,14 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0034, quirk_no_bus_reset);
  */
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset);
 
+/*
+ * Radeon RX Vega and Navi devices break on bus reset. Oi...

aiberia

GTAV @ 4K Res, original looking glass:

[I]               dxgi.c:684  | dxgi_capture                   | tex: 1 frame: 00000377 ups:  38.2 acquireTime:   0.6561 mapTime:  17.8065 totalTime:  18.4696
[I]               dxgi.c:684  | dxgi_capture                   | tex: 2 frame: 00000378 ups:  39.3 acquireTime:   0.0859 mapTime:  28.6140 totalTime:  28.7084
[I]               dxgi.c:684  | dxgi_capture                   | tex: 0 frame: 00000379 ups:  38.1 acquireTime:   0.1219 mapTime:  19.2188 totalTime:  19.3442
[I]               dxgi.c:684  | dxgi_capture                   | tex: 1 frame: 00000380 ups:  37.8 acquireTime:   0.1054 mapTime:  16.0650 totalTime:  16.1750
[I]               dxgi.c:684  | dxgi_capture                   | tex: 2 frame: 00000381 ups:  38.9 acquireTime:   0.3961 mapTime:  15.8534 totalTime:  16.2540
[I]               dxgi.c:684  | dxgi_capture                   | tex: 0 frame: 00000382 ups:  39.6 acquireTime:   0.7999 mapTime:  29.0496 totalTime:  29.8536
[I]               dxgi.c:684