The current position of the check_hwdom_reqs is wrong, as there's a
is_iommu_enabled at the top of the function that will prevent getting
to the check on systems without an IOMMU, because the hardware domain
won't have the XEN_DOMCTL_CDF_iommu flag set.
Move the position of the check so it's done before the
is_iommu_enabled one, and thus attempts to create a translated
hardware domain without an IOMMU can be detected.
Fixes: f89f555827a ('remove late (on-demand) construction of IOMMU page tables')
Signed-off-by: Roger Pau Monné
---
xen/drivers/passthrough/iommu.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index cab7a068aa..dac1b58fa5 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -172,6 +172,9 @@ int iommu_domain_init(struct domain *d, unsigned int opts)
struct domain_iommu *hd = dom_iommu(d);
int ret = 0;
+if ( is_hardware_domain(d) )
+check_hwdom_reqs(d); /* may modify iommu_hwdom_strict */
+
if ( !is_iommu_enabled(d) )
return 0;
@@ -188,9 +191,6 @@ int iommu_domain_init(struct domain *d, unsigned int opts)
if ( ret || is_system_domain(d) )
return ret;
-if ( is_hardware_domain(d) )
-check_hwdom_reqs(d); /* may modify iommu_hwdom_strict */
-
/*
* Use shared page tables for HAP and IOMMU if the global option
* is enabled (from which we can infer the h/w is capable) and
--
2.25.0
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