[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH v2 7/9] xen/arm: set up shared memory foreign mapping for borrower domain
On Fri, 6 May 2022, Penny Zheng wrote: > 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.zheng@xxxxxxx> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx> > --- > 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 | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c > index 089b9e99fc..8d299a3616 100644 > --- a/xen/arch/arm/domain_build.c > +++ b/xen/arch/arm/domain_build.c > @@ -965,6 +965,16 @@ 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 = guest_physmap_add_pages(d, _gfn(PFN_UP(gbase)), > + _mfn(PFN_UP(pbase)), > PFN_DOWN(psize), > + p2m_map_foreign_rw); > + if ( ret ) > + return ret; > + } > } > > return 0; > -- > 2.25.1 >
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