iotests: Fix test 200 on s390x without virtio-pci

[mirror_qemu.git] / docs / pcie.txt

diff --git a/docs/pcie.txt b/docs/pcie.txt
index 8d3694970eacd7a7b97bd3ae2d8ba58e2b5b3576..89e35020752de10ffd946f712e7181c81f5f0c93 100644 (file)
--- a/docs/pcie.txt
+++ b/docs/pcie.txt
@@ -3,8 +3,13 @@ PCI EXPRESS GUIDELINES
 
 1. Introduction
 ================
-The doc proposes best practices on how to use PCI Express/PCI device
-in PCI Express based machines and explains the reasoning behind them.
+The doc proposes best practices on how to use PCI Express (PCIe) / PCI
+devices in PCI Express based machines and explains the reasoning behind
+them.
+
+Note that the PCIe features are available only when using the 'q35'
+machine type on x86 architecture and the 'virt' machine type on AArch64.
+Other machine types do not use PCIe at this time.
 
 The following presentations accompany this document:
  (1) Q35 overview.