| Message ID | 1391794991-5919-8-git-send-email-julien.grall@linaro.org |
|---|---|
| State | Accepted |
| Commit | 9b51591c330672765d866a5ed4ed8e40c75bb1cf |
| Headers | show |
On Fri, 2014-02-07 at 17:43 +0000, Julien Grall wrote: > Currently iommu_init_dom0 is browsing the page list and call map_page callback > on each page. > > On both AMD and VTD drivers, the function will directly return if the page > table is shared with the processor. So Xen can safely avoid to run through > the page list. > > Signed-off-by: Julien Grall <julien.grall@linaro.org> > Cc: Xiantao Zhang <xiantao.zhang@intel.com> > Cc: Jan Beulich <jbeulich@suse.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> > --- > xen/drivers/passthrough/iommu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c > index 26a5d91..0a26956 100644 > --- a/xen/drivers/passthrough/iommu.c > +++ b/xen/drivers/passthrough/iommu.c > @@ -157,7 +157,7 @@ void __init iommu_dom0_init(struct domain *d) > > register_keyhandler('o', &iommu_p2m_table); > d->need_iommu = !!iommu_dom0_strict; > - if ( need_iommu(d) ) > + if ( need_iommu(d) && !iommu_use_hap_pt(d) ) > { > struct page_info *page; > unsigned int i = 0;
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c index 26a5d91..0a26956 100644 --- a/xen/drivers/passthrough/iommu.c +++ b/xen/drivers/passthrough/iommu.c @@ -157,7 +157,7 @@ void __init iommu_dom0_init(struct domain *d) register_keyhandler('o', &iommu_p2m_table); d->need_iommu = !!iommu_dom0_strict; - if ( need_iommu(d) ) + if ( need_iommu(d) && !iommu_use_hap_pt(d) ) { struct page_info *page; unsigned int i = 0;
Currently iommu_init_dom0 is browsing the page list and call map_page callback on each page. On both AMD and VTD drivers, the function will directly return if the page table is shared with the processor. So Xen can safely avoid to run through the page list. Signed-off-by: Julien Grall <julien.grall@linaro.org> Cc: Xiantao Zhang <xiantao.zhang@intel.com> Cc: Jan Beulich <jbeulich@suse.com> --- xen/drivers/passthrough/iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)