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Subject[PATCH RFC v1 04/18] iommu/hyperv: don't setup IRQ remapping when running as root
Date
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 <wei.liu@kernel.org>
---
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 <asm/io_apic.h>
#include <asm/irq_remapping.h>
#include <asm/hypervisor.h>
+#include <asm/mshyperv.h>

#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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