From 76ee79654a99ba56edfdd03ffa165dbcf9ab4e95 Mon Sep 17 00:00:00 2001
From: Ciro Santilli <ciro.santilli@gmail.com>
Date: Thu, 24 May 2018 13:59:57 +0100
Subject: [PATCH] pci: document info qtree to get pci device info

---
 README.adoc | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/README.adoc b/README.adoc
index 1949a11..c09cb86 100644
--- a/README.adoc
+++ b/README.adoc
@@ -3909,6 +3909,37 @@ In our case for example, we see:
 
 which we identify as being `edu` and `pci_min` respectively by the magic numbers: `1234:11e?`
 
+Alternatively, we can also do use the QEMU monitor:
+
+....
+echo 'info qtree' | ./qemumonitor
+....
+
+which gives:
+
+....
+      dev: lkmc_pci_min, id ""
+        addr = 07.0
+        romfile = ""
+        rombar = 1 (0x1)
+        multifunction = false
+        command_serr_enable = true
+        x-pcie-lnksta-dllla = true
+        x-pcie-extcap-init = true
+        class Class 00ff, addr 00:07.0, pci id 1234:11e9 (sub 1af4:1100)
+        bar 0: mem at 0xfeb54000 [0xfeb54007]
+      dev: edu, id ""
+        addr = 06.0
+        romfile = ""
+        rombar = 1 (0x1)
+        multifunction = false
+        command_serr_enable = true
+        x-pcie-lnksta-dllla = true
+        x-pcie-extcap-init = true
+        class Class 00ff, addr 00:06.0, pci id 1234:11e8 (sub 1af4:1100)
+        bar 0: mem at 0xfea00000 [0xfeafffff]
+....
+
 Read the configuration registers as binary:
 
 ....