[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 1/5] x86/shim: map and unmap page tables in replace_va_mapping
From: Wei Liu <wei.liu2@xxxxxxxxxx> Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx> Reviewed-by: Hongyan Xia <hongyxia@xxxxxxxxxx> --- xen/arch/x86/pv/shim.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/xen/arch/x86/pv/shim.c b/xen/arch/x86/pv/shim.c index ed2ece8a8a..1229d5ffb3 100644 --- a/xen/arch/x86/pv/shim.c +++ b/xen/arch/x86/pv/shim.c @@ -169,15 +169,19 @@ static void __init replace_va_mapping(struct domain *d, l4_pgentry_t *l4start, unsigned long va, mfn_t mfn) { l4_pgentry_t *pl4e = l4start + l4_table_offset(va); - l3_pgentry_t *pl3e = l4e_to_l3e(*pl4e) + l3_table_offset(va); - l2_pgentry_t *pl2e = l3e_to_l2e(*pl3e) + l2_table_offset(va); - l1_pgentry_t *pl1e = l2e_to_l1e(*pl2e) + l1_table_offset(va); + l3_pgentry_t *pl3e = map_l3t_from_l4e(*pl4e) + l3_table_offset(va); + l2_pgentry_t *pl2e = map_l2t_from_l3e(*pl3e) + l2_table_offset(va); + l1_pgentry_t *pl1e = map_l1t_from_l2e(*pl2e) + l1_table_offset(va); struct page_info *page = mfn_to_page(l1e_get_mfn(*pl1e)); put_page_and_type(page); *pl1e = l1e_from_mfn(mfn, (!is_pv_32bit_domain(d) ? L1_PROT : COMPAT_L1_PROT)); + + UNMAP_DOMAIN_PAGE(pl1e); + UNMAP_DOMAIN_PAGE(pl2e); + UNMAP_DOMAIN_PAGE(pl3e); } static void evtchn_reserve(struct domain *d, unsigned int port) -- 2.24.1.AMZN _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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