From 2ef44d5d7f7553b7c0a7bf3d93da27e1a1a0180a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vin=C3=ADcius=20Ferr=C3=A3o?=
 <2031761+viniciusferrao@users.noreply.github.com>
Date: Thu, 20 Aug 2026 16:42:19 -0300
Subject: [PATCH] feat(xCAT-server): install and netboot EL10 riscv64 nodes

EL riscv64 media lay out the installer kernel and initrd under
images/pxeboot exactly like x86 and aarch64 media, but anaconda.pm only
looked there for those two families and geninitrd.pm refused riscv64
outright ("unknow arch"). Treat riscv64 like x86/aarch64 in both
places and recognise riscv64 kernels when a driver disk updates the
installer kernel. There is no riscv64 SUSE media, so geninitrd keeps the
unsupported-architecture error for sles/suse rather than reading the x86
SUSE layout.

Diskless images get a riscv64 default network driver list (virtio,
Intel, Realtek, Broadcom and Mellanox) and take the resolver libraries
from lib64, which is where riscv64 EL puts them.
---
 xCAT-server/lib/xcat/plugins/anaconda.pm            | 4 ++--
 xCAT-server/lib/xcat/plugins/geninitrd.pm           | 4 +++-
 xCAT-server/share/xcat/netboot/imgutils/imgutils.pm | 1 +
 xCAT-server/share/xcat/netboot/rh/genimage          | 2 +-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/xCAT-server/lib/xcat/plugins/anaconda.pm b/xCAT-server/lib/xcat/plugins/anaconda.pm
index 9107f26ed..334f17108 100644
--- a/xCAT-server/lib/xcat/plugins/anaconda.pm
+++ b/xCAT-server/lib/xcat/plugins/anaconda.pm
@@ -1342,7 +1342,7 @@ sub mkinstall
 
         if (
             (
-                ( $arch =~ /x86/ or $arch =~ /aarch64/ ) and
+                ( $arch =~ /x86/ or $arch =~ /aarch64/ or $arch =~ /riscv64/ ) and
                 (
                     -r "$pkgdir/images/pxeboot/vmlinuz"
                     and $kernpath = "$pkgdir/images/pxeboot/vmlinuz"
@@ -2798,7 +2798,7 @@ sub insert_dd {
                 # and copy it to the /tftpboot
                 my @new_kernels = <$dd_dir/rpm/boot/vmlinuz*>;
                 foreach my $new_kernel (@new_kernels) {
-                    if (-r $new_kernel && $new_kernel =~ /\/vmlinuz-(.*(x86_64|ppc64|el\d+|ppc64le|aarch64))$/) {
+                    if (-r $new_kernel && $new_kernel =~ /\/vmlinuz-(.*(x86_64|ppc64|el\d+|ppc64le|aarch64|riscv64))$/) {
                         $new_kernel_ver = $1;
                         $cmd            = "/bin/mv -f $new_kernel $kernelpath";
                         xCAT::Utils->runcmd($cmd, -1);
diff --git a/xCAT-server/lib/xcat/plugins/geninitrd.pm b/xCAT-server/lib/xcat/plugins/geninitrd.pm
index 157280ee7..47b07e883 100644
--- a/xCAT-server/lib/xcat/plugins/geninitrd.pm
+++ b/xCAT-server/lib/xcat/plugins/geninitrd.pm
@@ -189,7 +189,9 @@ sub geninitrd {
     unless (-d $tftppath) {
         mkpath $tftppath;
     }
-    if ($arch =~ /x86/) {
+    # riscv64 installation media exist for the EL family only; leave any other
+    # distribution to the "unknow arch" error below instead of reading it as x86
+    if ($arch =~ /x86/ or ($arch =~ /riscv64/ and $osvers !~ /sles|suse/)) {
         if ($osvers =~ /(^ol[0-9].*)|(centos.*)|(alma.*)|(rocky.*)|(rh.*)|(fedora.*)|(SL.*)/) {
             $kernelpath = "$tftppath/vmlinuz";
             copy("$pkgdir/images/pxeboot/vmlinuz", $kernelpath);
diff --git a/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm b/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm
index ea01a75ff..a5881c984 100644
--- a/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm
+++ b/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm
@@ -256,6 +256,7 @@ sub default_net_drivers {
             x86    => [qw(tg3 bnx2 bnx2x e1000 e1000e igb mlx_en mlx5_core virtio_net be2net)],
             x86_64 => [qw(tg3 bnx2 bnx2x e1000 e1000e igb mlx_en mlx5_core virtio_net be2net)],
             aarch64 => [qw(tg3 bnx2 bnx2x e1000e igb mlx_en mlx5_core virtio_net)],
+            riscv64 => [qw(e1000 e1000e igb ixgbe r8169 tg3 bnx2x mlx5_core virtio_net)],
             ppc64   => [qw(e1000 e1000e igb ibmveth ehea)],
             s390x   => [qw(qdio ccwgroup)],
         },
diff --git a/xCAT-server/share/xcat/netboot/rh/genimage b/xCAT-server/share/xcat/netboot/rh/genimage
index 20424cd82..3dc1c392d 100755
--- a/xCAT-server/share/xcat/netboot/rh/genimage
+++ b/xCAT-server/share/xcat/netboot/rh/genimage
@@ -1924,7 +1924,7 @@ EOMS
         }
     }
 
-    if ($arch =~ /x86_64/ or $arch =~ /aarch64/) {
+    if ($arch =~ /x86_64/ or $arch =~ /aarch64/ or $arch =~ /riscv64/) {
         push @filestoadd, "lib64/libnss_dns.so.2";
         push @filestoadd, "lib64/libresolv.so.2";
     } else {