| Message ID | 20220506072502.2177828-8-Penny.Zheng@arm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | static shared memory on dom0less system | expand |
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@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > --- > 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 >
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;
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@arm.com> --- 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(+)