[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 2/4] xen/arm: p2m: Store the page for each mapping
The page will be use later for reference counting. So we need a quick access to the page associated to the mapping. Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx> --- xen/arch/arm/p2m.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index f910cab..f28ae3f 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -942,6 +942,7 @@ static int apply_p2m_changes(struct domain *d, int rc, ret; struct p2m_domain *p2m = &d->arch.p2m; lpae_t *mappings[4] = { NULL, NULL, NULL, NULL }; + struct page_info *pages[4] = { NULL, NULL, NULL, NULL }; paddr_t addr, orig_maddr = maddr; unsigned int level = 0; unsigned int cur_root_table = ~0; @@ -964,7 +965,10 @@ static int apply_p2m_changes(struct domain *d, /* Static mapping. P2M_ROOT_PAGES > 1 are handled below */ if ( P2M_ROOT_PAGES == 1 ) + { mappings[P2M_ROOT_LEVEL] = __map_domain_page(p2m->root); + pages[P2M_ROOT_LEVEL] = p2m->root; + } addr = start_gpaddr; while ( addr < end_gpaddr ) @@ -1047,6 +1051,7 @@ static int apply_p2m_changes(struct domain *d, unmap_domain_page(mappings[P2M_ROOT_LEVEL]); mappings[P2M_ROOT_LEVEL] = __map_domain_page(p2m->root + root_table); + pages[P2M_ROOT_LEVEL] = p2m->root + root_table; cur_root_table = root_table; /* Any mapping further down is now invalid */ for ( i = P2M_ROOT_LEVEL; i < 4; i++ ) @@ -1079,6 +1084,7 @@ static int apply_p2m_changes(struct domain *d, if ( mappings[level+1] ) unmap_domain_page(mappings[level+1]); mappings[level+1] = map_domain_page(_mfn(entry->p2m.base)); + pages[level+1] = mfn_to_page(entry->p2m.base); cur_offset[level] = offset; /* Any mapping further down is now invalid */ for ( i = level+1; i < 4; i++ ) -- 2.1.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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