Re: [PATCH RFC v1 04/18] iommu/hyperv: don't setup IRQ remapping when running as root

[Joerg Roedel]

On Mon, Sep 14, 2020 at 11:27:48AM +, Wei Liu wrote:
> The IOMMU code needs more work. We're sure for now the IRQ remapping
> hooks are not applicable when Linux is the root.
> 
> Signed-off-by: Wei Liu 
> ---
>  drivers/iommu/hyperv-iommu.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Acked-by: Joerg Roedel 

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[PATCH RFC v1 04/18] iommu/hyperv: don't setup IRQ remapping when running as root

[Wei Liu]

The IOMMU code needs more work. We're sure for now the IRQ remapping
hooks are not applicable when Linux is the root.

Signed-off-by: Wei Liu 
---
 drivers/iommu/hyperv-iommu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index 8919c1c70b68..4da684ab292c 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -20,6 +20,7 @@
 #include 
 #include 
 #include 
+#include 
 
 #include "irq_remapping.h"
 
@@ -143,7 +144,7 @@ static int __init hyperv_prepare_irq_remapping(void)
int i;
 
if (!hypervisor_is_type(X86_HYPER_MS_HYPERV) ||
-   !x2apic_supported())
+   !x2apic_supported() || hv_root_partition)
return -ENODEV;
 
fn = irq_domain_alloc_named_id_fwnode("HYPERV-IR", 0);
-- 
2.20.1

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