[Xen-changelog] [xen master] xen/arm32: mm: Avoid cleaning the cache for secondary CPUs page-tables

[patchbot@xxxxxxx]

commit 9bd8d268d8b586ad6948feb42f709df39271d7c4
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Sun Apr 21 19:53:12 2019 +0100
Commit:     Julien Grall <julien.grall@xxxxxxx>
CommitDate: Thu Jun 13 13:07:58 2019 +0100

    xen/arm32: mm: Avoid cleaning the cache for secondary CPUs page-tables
    
    The page-table walker is configured by TCR_EL2 to use the same
    shareability and cacheability as the access performed when updating the
    page-tables. This means cleaning the cache for secondary CPUs runtime
    page-tables is unnecessary.
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Reviewed-by: Andrii Anisov <andrii_anisov@xxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/mm.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 8751d763fb..7ed8400993 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -738,9 +738,6 @@ int init_secondary_pagetables(int cpu)
         write_pte(&first[first_table_offset(DOMHEAP_VIRT_START+i*FIRST_SIZE)], 
pte);
     }
 
-    clean_dcache_va_range(first, PAGE_SIZE);
-    clean_dcache_va_range(domheap, DOMHEAP_SECOND_PAGES*PAGE_SIZE);
-
     per_cpu(xen_pgtable, cpu) = first;
     per_cpu(xen_dommap, cpu) = domheap;
 
--
generated by git-patchbot for /home/xen/git/xen.git#master

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