nvidiabluefield: Added mlxbf-bootctl kernel module in dracut generation and automated loading.

Author: Okoyl

dracut/30ignition/module-setup.sh

@@ -123,5 +123,10 @@ installkernel() {
         instmods -c zcrypt_cex4
         instmods -c pkey_cca
      fi
+
+     # required by nvidiabluefield platform to read ignition file through bootfifo sysfs interface
+     if [[ ${DRACUT_ARCH:-$(uname -m)} == aarch64 ]]; then
+        instmods -c mlxbf-bootctl
+     fi
 }
 

internal/providers/nvidiabluefield/nvidiabluefield.go

@@ -20,8 +20,10 @@ package nvidiabluefield
 import (
 	"bytes"
 	"os"
+	"os/exec"
 
 	"github.com/coreos/ignition/v2/config/v3_6_experimental/types"
+	"github.com/coreos/ignition/v2/internal/distro"
 	"github.com/coreos/ignition/v2/internal/platform"
 	"github.com/coreos/ignition/v2/internal/providers/util"
 	"github.com/coreos/ignition/v2/internal/resource"
@@ -43,6 +45,11 @@ func init() {
 }
 
 func fetchConfig(f *resource.Fetcher) (cfg types.Config, rpt report.Report, err error) {
+	// load mlxbf-bootctl module
+	if _, err = f.Logger.LogCmd(exec.Command(distro.ModprobeCmd(), "mlxbf-bootctl"), "loading mlxbf-booctl kernel module"); err != nil {
+		return
+	}
+
 	for _, bootfifoPath := range bootfifoPaths {
 		f.Logger.Debug("Attempting to read bootfifo at %s", bootfifoPath)
 		raw, err := os.ReadFile(bootfifoPath)