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 <penny.zh...@arm.com> Reviewed-by: Stefano Stabellini <sstabell...@kernel.org> --- v4 changes: - no change --- v3 change: - use map_regions_p2mt instead --- v2 change: - remove guest_physmap_add_shm, since for borrower domain, we only do P2M foreign memory mapping now. --- 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 3a20247836..fcdd87468d 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -957,6 +957,15 @@ 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; -- 2.25.1