diff mbox series

[v3,18/52] xen/arm: only map the init text section RW in free_init_memory

Message ID 20230626033443.2943270-19-Penny.Zheng@arm.com (mailing list archive)
State New, archived
Headers show
Series xen/arm: Add Armv8-R64 MPU support to Xen - Part#1 | expand

Commit Message

Penny Zheng June 26, 2023, 3:34 a.m. UTC 
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: Penny Zheng <penny.zheng@arm.com>
Signed-off-by: Wei Chen <wei.chen@arm.com>
---
v3:
- new commit
---
 xen/arch/arm/mm.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 4b174f4d08..97642f35d3 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -145,16 +145,17 @@  int modify_xen_mappings(unsigned long s, unsigned long e, unsigned int flags)
 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,