From b7133c10a3fd3b66b8d6a657a55855ab78f0a75b Mon Sep 17 00:00:00 2001 From: Penny Zheng Date: Thu, 8 Sep 2022 21:55:10 +0800 Subject: [PATCH] xen/arm: set up shared memory foreign mapping for borrower domain This commit sets up shared memory foreign mapping for borrower domain. If owner domain is the default dom_io, all shared domain are treated as borrower domain. Signed-off-by: Penny Zheng Reviewed-by: Stefano Stabellini --- xen/arch/arm/domain_build.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 417a0e82ba..dfcda604b3 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -992,6 +992,15 @@ static int __init process_shm(struct domain *d, if ( ret ) return ret; } + + if ( owner_dom_io || (strcmp(role_str, "borrower") == 0) ) + { + /* Set up P2M foreign mapping for borrower domain. */ + ret = map_regions_p2mt(d, _gfn(PFN_UP(gbase)), PFN_DOWN(psize), + _mfn(PFN_UP(pbase)), p2m_map_foreign_rw); + if ( ret ) + return ret; + } } return 0; -- 2.39.5