[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 4/4] xen: expose that grant table mappings update the IOMMU
Add a new XENFEAT_hvm_gntmap_supports_iommu that is used to check whether the hypervisor properly updates the IOMMU on auto-translated guests when doing a grant table map/unmap operation. Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx> Cc: Keir Fraser <keir@xxxxxxx> Cc: Jan Beulich <jbeulich@xxxxxxxx> --- xen/common/kernel.c | 2 ++ xen/include/public/features.h | 6 ++++++ 2 files changed, 8 insertions(+), 0 deletions(-) diff --git a/xen/common/kernel.c b/xen/common/kernel.c index b371f8f..7589dc1 100644 --- a/xen/common/kernel.c +++ b/xen/common/kernel.c @@ -316,11 +316,13 @@ DO(xen_version)(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg) case guest_type_pvh: fi.submap |= (1U << XENFEAT_hvm_safe_pvclock) | (1U << XENFEAT_supervisor_mode_kernel) | + (1U << XENFEAT_hvm_gntmap_supports_iommu) | (1U << XENFEAT_hvm_callback_vector); break; case guest_type_hvm: fi.submap |= (1U << XENFEAT_hvm_safe_pvclock) | (1U << XENFEAT_hvm_callback_vector) | + (1U << XENFEAT_hvm_gntmap_supports_iommu) | (1U << XENFEAT_hvm_pirqs); break; } diff --git a/xen/include/public/features.h b/xen/include/public/features.h index a149aa6..eaa0187 100644 --- a/xen/include/public/features.h +++ b/xen/include/public/features.h @@ -94,6 +94,12 @@ /* operation as Dom0 is supported */ #define XENFEAT_dom0 11 +/* + * If set, GNTTABOP_map_grant_ref sets the proper IOMMU mappings so the + * resulting mapped page can be used for IO with hardware devices. + */ +#define XENFEAT_hvm_gntmap_supports_iommu 12 + #define XENFEAT_NR_SUBMAPS 1 #endif /* __XEN_PUBLIC_FEATURES_H__ */ -- 1.7.7.5 (Apple Git-26) _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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