[Xen-devel] [PATCH 34/34] RFC x86: introduce directio virt cap

[Wei Liu <wei.liu2@xxxxxxxxxx>]

hvm_directio is set when iommu is enabled, but in fact iommu is not
tied to HVM. In order to not break existing tools, expose a new flag
directio for (iommu_enabled && !hvm_enabled).

RFC This doesn't build at the moment. Do we care about that flag being
inaccurate?

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/arch/x86/sysctl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index e704ed7..a8d64c5 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -92,8 +92,10 @@ void arch_do_physinfo(struct xen_sysctl_physinfo *pi)
            min(sizeof(pi->hw_cap), sizeof(boot_cpu_data.x86_capability)));
     if ( hvm_enabled )
         pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm;
-    if ( iommu_enabled )
+    if ( hvm_enabled && iommu_enabled )
         pi->capabilities |= XEN_SYSCTL_PHYSCAP_hvm_directio;
+    else if ( iommu_enabled )
+        pi->capabilities |= XEN_SYSCTL_PHYSCAP_directio;
 }
 
 long arch_do_sysctl(
-- 
git-series 0.9.1

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel