[xen staging] x86/boot: move l<N>_bootmap

[patchbot@xxxxxxx]

commit afbb876f1fe6f45ca5c3c425925d3d15101c7382
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Jun 26 14:59:05 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Jun 26 14:59:05 2025 +0200

    x86/boot: move l<N>_bootmap
    
    Having them in the general .init.data section is somewhat wasteful, due
    to involved padding. Move them into .init.data.page_aligned, and place
    that right after .init.bss.stack_aligned.
    
    Overall .init.data* shrinks by slightly over 2 pages in the build I'm
    looking at.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/boot/x86_64.S | 2 +-
 xen/arch/x86/xen.lds.S     | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/boot/x86_64.S b/xen/arch/x86/boot/x86_64.S
index 08ae97e261..95a6b6cf63 100644
--- a/xen/arch/x86/boot/x86_64.S
+++ b/xen/arch/x86/boot/x86_64.S
@@ -193,7 +193,7 @@ END(idle_pg_table)
 GLOBAL(__page_tables_end)
 
 /* Init pagetables. Enough page directories to map into 4GB. */
-        .section .init.data, "aw", @progbits
+        .section .init.data.page_aligned, "aw", @progbits
 
 DATA_LOCAL(l1_bootmap, PAGE_SIZE)
         .fill L1_PAGETABLE_ENTRIES, 8, 0
diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S
index bf956b6c5f..636c7768aa 100644
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -221,6 +221,7 @@ SECTIONS
   DECL_SECTION(.init.data) {
 #endif
        *(.init.bss.stack_aligned)
+       *(.init.data.page_aligned)
 
        . = ALIGN(POINTER_ALIGN);
        __initdata_cf_clobber_start = .;
--
generated by git-patchbot for /home/xen/git/xen.git#staging