From e6db435973160591fe7348876a5567c729495175 Mon Sep 17 00:00:00 2001
From: Jonathan Ringer <jonringer117@gmail.com>
Date: Thu, 29 Oct 2020 01:15:05 -0700
Subject: [PATCH] linux: add flavor metadata

---
 pkgs/os-specific/linux/kernel/generic.nix     | 9 ++++++++-
 pkgs/os-specific/linux/kernel/linux-libre.nix | 1 +
 pkgs/os-specific/linux/kernel/linux-zen.nix   | 1 +
 pkgs/top-level/all-packages.nix               | 5 +++++
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/kernel/generic.nix b/pkgs/os-specific/linux/kernel/generic.nix
index cab11cc87ae..dd3050a93ee 100644
--- a/pkgs/os-specific/linux/kernel/generic.nix
+++ b/pkgs/os-specific/linux/kernel/generic.nix
@@ -45,6 +45,11 @@
                        stdenv.hostPlatform != stdenv.buildPlatform
 , extraMeta ? {}
 
+, isXen      ? features.xen_dom0 or false
+, isZen      ? false
+, isLibre    ? false
+, isHardened ? false
+
 # easy overrides to stdenv.hostPlatform.platform members
 , autoModules ? stdenv.hostPlatform.platform.kernelAutoModules
 , preferBuiltin ? stdenv.hostPlatform.platform.kernelPreferBuiltin or false
@@ -175,7 +180,9 @@ let
 
   passthru = {
     features = kernelFeatures;
-    inherit commonStructuredConfig;
+    inherit commonStructuredConfig isXen isZen isHardened isLibre;
+    kernelOlder = lib.versionOlder version;
+    kernelAtLeast = lib.versionAtLeast version;
     passthru = kernel.passthru // (removeAttrs passthru [ "passthru" ]);
   };
 
diff --git a/pkgs/os-specific/linux/kernel/linux-libre.nix b/pkgs/os-specific/linux/kernel/linux-libre.nix
index 7a831e61ae4..1e8514e9c2c 100644
--- a/pkgs/os-specific/linux/kernel/linux-libre.nix
+++ b/pkgs/os-specific/linux/kernel/linux-libre.nix
@@ -17,6 +17,7 @@ let
 in linux.override {
   argsOverride = {
     modDirVersion = "${linux.modDirVersion}-gnu";
+    isLibre = true;
 
     src = stdenv.mkDerivation {
       name = "${linux.name}-libre-src";
diff --git a/pkgs/os-specific/linux/kernel/linux-zen.nix b/pkgs/os-specific/linux/kernel/linux-zen.nix
index 947aa7c19ab..f4b0f3870f2 100644
--- a/pkgs/os-specific/linux/kernel/linux-zen.nix
+++ b/pkgs/os-specific/linux/kernel/linux-zen.nix
@@ -7,6 +7,7 @@ in
 buildLinux (args // {
   modDirVersion = "${version}-zen1";
   inherit version;
+  isZen = true;
 
   src = fetchFromGitHub {
     owner = "zen-kernel";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 319d24d2e25..d017efe6dfb 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18014,6 +18014,10 @@ in
     inherit kernel;
     inherit (kernel) stdenv; # in particular, use the same compiler by default
 
+    # to help determine module compatibility
+    inherit (kernel) isXen isZen isHardened isLibre;
+    inherit (kernel) kernelOlder kernelAtLeast;
+
     # Obsolete aliases (these packages do not depend on the kernel).
     inherit (pkgs) odp-dpdk pktgen; # added 2018-05
 
@@ -18277,6 +18281,7 @@ in
         kernelPatches.hardened.${kernel.meta.branch}
       ];
       modDirVersionArg = kernel.modDirVersion + "-hardened";
+      isHardened = true;
   });
 
   linuxPackages_hardened = recurseIntoAttrs (hardenedLinuxPackagesFor pkgs.linux { });