From 71fc56e415bf356df42f073fca2590761dfaa1ff Mon Sep 17 00:00:00 2001
From: Artemis Tosini <me@artem.ist>
Date: Tue, 29 Sep 2020 23:12:47 +0000
Subject: [PATCH] Add cursed patch for spike

---
 externals/patches/increase_max_topo.patch | 13 +++++++++++++
 system/spike/boot-config.nix              |  4 ++++
 2 files changed, 17 insertions(+)
 create mode 100644 externals/patches/increase_max_topo.patch

diff --git a/externals/patches/increase_max_topo.patch b/externals/patches/increase_max_topo.patch
new file mode 100644
index 0000000..f0617bb
--- /dev/null
+++ b/externals/patches/increase_max_topo.patch
@@ -0,0 +1,13 @@
+diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
+index 3dbb42c637c1..8d45c90cee8a 100644
+--- a/include/linux/usb/hcd.h
++++ b/include/linux/usb/hcd.h
+@@ -26,7 +26,7 @@
+ #include <linux/interrupt.h>
+ #include <linux/idr.h>
+ 
+-#define MAX_TOPO_LEVEL		6
++#define MAX_TOPO_LEVEL		1022
+ 
+ /* This file contains declarations of usbcore internals that are mostly
+  * used or exposed by Host Controller Drivers.
diff --git a/system/spike/boot-config.nix b/system/spike/boot-config.nix
index 08c4c2e..67225fa 100644
--- a/system/spike/boot-config.nix
+++ b/system/spike/boot-config.nix
@@ -3,6 +3,10 @@
 {
   boot = {
     kernelPackages = pkgs.linuxPackages_latest;
+    kernelPatches = [ {
+      name = "increase_max_topo";
+      patch = ../../externals/patches/increase_max_topo.patch;
+    } ];
     kernel.sysctl."vm.swappiness" = 5;
     cleanTmpDir = true;