[mini-os master] e820: fix e820_get_reserved_pfns() to reserve page aligned area

[patchbot@xxxxxxx]

commit 3da8a249fac4933dab44593eedab99b582342fe1
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Mon Jul 14 16:00:43 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Jul 14 16:00:43 2025 +0200

    e820: fix e820_get_reserved_pfns() to reserve page aligned area
    
    e820_get_reserved_pfns() needs to make sure to reserve only page
    aligned memory areas.
    
    Fixes: a7d27a7332ba ("mini-os: add memory map service functions")
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 e820.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/e820.c b/e820.c
index 49b1687..16622e2 100644
--- a/e820.c
+++ b/e820.c
@@ -362,7 +362,7 @@ unsigned long e820_get_reserved_pfns(int pages)
     unsigned long last = 0, needed = (long)pages << PAGE_SHIFT;
 
     for ( i = 0; i < e820_entries && e820_map[i].addr < last + needed; i++ )
-        last = e820_map[i].addr + e820_map[i].size;
+        last = round_pgup(e820_map[i].addr + e820_map[i].size);
 
     if ( i == 0 || e820_map[i - 1].type != E820_RESERVED )
         e820_insert_entry_at(i, last, needed, E820_RESERVED);
--
generated by git-patchbot for /home/xen/git/mini-os.git#master