[PATCH 3/5] xen/arm: only map the init text section RW in free_init_memory

[Luca Fancellu <luca.fancellu@xxxxxxx>]

From: Penny Zheng <Penny.Zheng@xxxxxxx>

In free_init_memory, we do not need to map the whole init section RW,
as only init text section is mapped RO in boot time.

Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
---
This is this one: 
https://patchwork.kernel.org/project/xen-devel/patch/20230626033443.2943270-19-Penny.Zheng@xxxxxxx/
---
 xen/arch/arm/mmu/setup.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/mmu/setup.c b/xen/arch/arm/mmu/setup.c
index 9664e85ee6c0..1b1d302c8788 100644
--- a/xen/arch/arm/mmu/setup.c
+++ b/xen/arch/arm/mmu/setup.c
@@ -7,6 +7,7 @@
 
 #include <xen/init.h>
 #include <xen/libfdt/libfdt.h>
+#include <xen/pfn.h>
 #include <xen/sections.h>
 #include <xen/sizes.h>
 #include <xen/vmap.h>
@@ -309,16 +310,17 @@ void *__init arch_vmap_virt_end(void)
 void free_init_memory(void)
 {
     paddr_t pa = virt_to_maddr(__init_begin);
+    unsigned long inittext_end = round_pgup((unsigned long)_einittext);
     unsigned long len = __init_end - __init_begin;
     uint32_t insn;
     unsigned int i, nr = len / sizeof(insn);
     uint32_t *p;
     int rc;
 
-    rc = modify_xen_mappings((unsigned long)__init_begin,
-                             (unsigned long)__init_end, PAGE_HYPERVISOR_RW);
+    rc = modify_xen_mappings((unsigned long)__init_begin, inittext_end,
+                             PAGE_HYPERVISOR_RW);
     if ( rc )
-        panic("Unable to map RW the init section (rc = %d)\n", rc);
+        panic("Unable to map RW the init text section (rc = %d)\n", rc);
 
     /*
      * From now on, init will not be used for execution anymore,
-- 
2.34.1