On Sun, Mar 12, 2023 at 08:01:54PM +0800, Huang Rui wrote: > The xen grant table will be initialied before parsing the PCI resources, > so xen_alloc_unpopulated_pages() ends up using a range from the PCI > window because Linux hasn't parsed the PCI information yet. > > So modify the initialization order to make sure the real PCI resources > are parsed before. Has this been tested on a domU to make sure the late grant table init doesn't interfere with PV devices getting setup? > Signed-off-by: Huang Rui <ray.huang@xxxxxxx> > --- > arch/x86/xen/grant-table.c | 2 +- > drivers/xen/grant-table.c | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c > index 1e681bf62561..64a04d1e70f5 100644 > --- a/arch/x86/xen/grant-table.c > +++ b/arch/x86/xen/grant-table.c > @@ -165,5 +165,5 @@ static int __init xen_pvh_gnttab_setup(void) > } > /* Call it _before_ __gnttab_init as we need to initialize the > * xen_auto_xlat_grant_frames first. */ > -core_initcall(xen_pvh_gnttab_setup); > +fs_initcall_sync(); > #endif > diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c > index e1ec725c2819..6382112f3473 100644 > --- a/drivers/xen/grant-table.c > +++ b/drivers/xen/grant-table.c > @@ -1680,4 +1680,4 @@ static int __gnttab_init(void) > } > /* Starts after core_initcall so that xen_pvh_gnttab_setup can be called > * beforehand to initialize xen_auto_xlat_grant_frames. */ Comment need to be updated, but I was thinking whether it won't be best to simply call xen_pvh_gnttab_setup() from __gnttab_init() itself when running as a PVH guest? Thanks, Roger.
