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Re: [Xen-devel] [PATCH v6 20/29] xen/x86: allow disabling the emulated IOMMU



On 9/4/2015 7:08 AM, Roger Pau Monne wrote:
Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
Cc: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx>
---
Changes since v4:
  - Add Andrew Cooper Acked-by.
---
  xen/drivers/passthrough/amd/iommu_guest.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/drivers/passthrough/amd/iommu_guest.c 
b/xen/drivers/passthrough/amd/iommu_guest.c
index e74f469..b4e75ac 100644
--- a/xen/drivers/passthrough/amd/iommu_guest.c
+++ b/xen/drivers/passthrough/amd/iommu_guest.c
@@ -887,7 +887,8 @@ int guest_iommu_init(struct domain* d)
      struct guest_iommu *iommu;
      struct hvm_iommu *hd  = domain_hvm_iommu(d);
- if ( !is_hvm_domain(d) || !iommu_enabled || !iommuv2_enabled )
+    if ( !is_hvm_domain(d) || !iommu_enabled || !iommuv2_enabled ||
+         !has_viommu(d) )
          return 0;
iommu = xzalloc(struct guest_iommu);


Acked-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx>

Thanks,
-Aravind.

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