[Xen-devel] [PATCH V3 1/2] xen/arm: mm: remove unnecessary tlb flush in setup_pagetables

[Peng Fan <van.freenix@xxxxxxxxx>]

CPU0 is using the boot pages table before relocating xen and
xen_second is not part of them. So, no need to flush the TLB
when filling xen_second.

Signed-off-by: Peng Fan <van.freenix@xxxxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
Reviewed-by: Julien Grall <julien.grall@xxxxxxx>
---
V3:
 Add Julien's review tag.

V2:
 Following Julien's comments:
   split the V1 patch into two patches. This patch only remove tlb flush.
   refine commit log

 xen/arch/arm/mm.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 94ea054..addd699 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -447,7 +447,6 @@ void __init setup_pagetables(unsigned long 
boot_phys_offset, paddr_t xen_paddr)
     dest_va = BOOT_RELOC_VIRT_START;
     pte = mfn_to_xen_entry(xen_paddr >> PAGE_SHIFT, WRITEALLOC);
     write_pte(xen_second + second_table_offset(dest_va), pte);
-    flush_xen_data_tlb_range_va_local(dest_va, SECOND_SIZE);
 
     /* Calculate virt-to-phys offset for the new location */
     phys_offset = xen_paddr - (unsigned long) _start;
-- 
2.6.2


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