[xen staging] dom0less: Create llc_color_str field in boot_domain

[patchbot@xxxxxxx]

commit a314a821f03ae466fa3c6fb5776be6249078bfe5
Author:     Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
AuthorDate: Tue Jul 22 13:59:46 2025 +0200
Commit:     Stefano Stabellini <stefano.stabellini@xxxxxxx>
CommitDate: Wed Jul 23 13:36:05 2025 -0700

    dom0less: Create llc_color_str field in boot_domain
    
    Later patches move the bindings to a separate function and expect the
    outputs to land in fields of a boot_domain. Adjust llc_color_str to
    live inside boot_domain so it can be parsed later on.
    
    Not a functional change.
    
    Signed-off-by: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/common/device-tree/dom0less-build.c | 12 ++++++++----
 xen/include/xen/bootfdt.h               |  5 +++++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/xen/common/device-tree/dom0less-build.c 
b/xen/common/device-tree/dom0less-build.c
index cee666786e..e1d723c796 100644
--- a/xen/common/device-tree/dom0less-build.c
+++ b/xen/common/device-tree/dom0less-build.c
@@ -834,7 +834,6 @@ void __init create_domUs(void)
     BUG_ON(chosen == NULL);
     dt_for_each_child_node(chosen, node)
     {
-        const char *llc_colors_str = NULL;
         struct kernel_info ki = KERNEL_INFO_INIT;
         struct xen_domctl_createdomain *d_cfg = &ki.bd.create_cfg;
         unsigned int *flags = &ki.bd.create_flags;
@@ -955,9 +954,11 @@ void __init create_domUs(void)
             d_cfg->max_maptrack_frames = val;
         }
 
-        dt_property_read_string(node, "llc-colors", &llc_colors_str);
-        if ( !llc_coloring_enabled && llc_colors_str )
+#ifdef CONFIG_HAS_LLC_COLORING
+        dt_property_read_string(node, "llc-colors", &ki.bd.llc_colors_str);
+        if ( !llc_coloring_enabled && ki.bd.llc_colors_str )
             panic("'llc-colors' found, but LLC coloring is disabled\n");
+#endif
 
         arch_create_domUs(node, d_cfg, *flags);
 
@@ -972,10 +973,13 @@ void __init create_domUs(void)
             panic("Error creating domain %s (rc = %ld)\n",
                   dt_node_name(node), PTR_ERR(ki.bd.d));
 
+#ifdef CONFIG_HAS_LLC_COLORING
         if ( llc_coloring_enabled &&
-             (rc = domain_set_llc_colors_from_str(ki.bd.d, llc_colors_str)) )
+             (rc = domain_set_llc_colors_from_str(ki.bd.d,
+                                                  ki.bd.llc_colors_str)) )
             panic("Error initializing LLC coloring for domain %s (rc = %d)\n",
                   dt_node_name(node), rc);
+#endif /* CONFIG_HAS_LLC_COLORING */
 
         ki.bd.d->is_console = true;
         dt_device_set_used_by(node, ki.bd.d->domain_id);
diff --git a/xen/include/xen/bootfdt.h b/xen/include/xen/bootfdt.h
index f107099263..0e82ccea2f 100644
--- a/xen/include/xen/bootfdt.h
+++ b/xen/include/xen/bootfdt.h
@@ -125,6 +125,11 @@ struct boot_domain {
     /* Input arguments to create_domain() */
     struct xen_domctl_createdomain create_cfg;
     unsigned int create_flags;
+
+#ifdef CONFIG_HAS_LLC_COLORING
+    /* LLC color selection string */
+    const char *llc_colors_str;
+#endif
 };
 
 #define BOOTMOD_MAX_CMDLINE 1024
--
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