From: Peng Fan <van.freenix@gmail.com>
Date: Thu, 12 May 2016 11:48:47 +0000 (+0800)
Subject: xen/arm: mm: remove unnecessary tlb flush in setup_pagetables
X-Git-Tag: 4.8.0-rc1~727
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=ee1f5620599396b7660988f7944fe2867c49abba;p=xen.git

xen/arm: mm: remove unnecessary tlb flush in setup_pagetables

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@gmail.com>
Reviewed-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
---

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 0aa8092bab..9d01ce2a42 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;