On Tue, 14 May 2019, Julien Grall wrote: > The page-table walker is configured to use the same shareability and > cacheability as the access performed when updating the page-tables. This > means cleaning the cache for CPU0 domheap is unnecessary. > > Furthermore, CPU0 page-tables are part of Xen binary and will already be > zeroed before been used. So it is pointless to zero the domheap again. > > Signed-off-by: Julien Grall <julien.gr...@arm.com> > Reviewed-by: Andrii Anisov <andrii_ani...@epam.com>
Reviewed-by: Stefano Stabellini <sstabell...@kernel.org> > --- > Changes in v2: > - Tweak a bit the commit message > - Add Andrii's reviewed-by > --- > xen/arch/arm/mm.c | 5 ----- > 1 file changed, 5 deletions(-) > > diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c > index e090afb976..cda2847d00 100644 > --- a/xen/arch/arm/mm.c > +++ b/xen/arch/arm/mm.c > @@ -724,11 +724,6 @@ void __init setup_pagetables(unsigned long > boot_phys_offset) > #ifdef CONFIG_ARM_32 > per_cpu(xen_pgtable, 0) = cpu0_pgtable; > per_cpu(xen_dommap, 0) = cpu0_dommap; > - > - /* Make sure it is clear */ > - memset(this_cpu(xen_dommap), 0, DOMHEAP_SECOND_PAGES*PAGE_SIZE); > - clean_dcache_va_range(this_cpu(xen_dommap), > - DOMHEAP_SECOND_PAGES*PAGE_SIZE); > #endif > } > > -- > 2.11.0 > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
