[PATCH v3 04/17] iommu/hyperv: don't setup IRQ remapping when running as root
From: Wei Liu <wei.liu@kernel.org>
Date: 2020-11-24 17:08:15
Also in:
linux-iommu, lkml
Subsystem:
hyper-v/azure core and drivers, iommu subsystem, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Joerg Roedel, Will Deacon, Linus Torvalds
The IOMMU code needs more work. We're sure for now the IRQ remapping hooks are not applicable when Linux is the root partition. Signed-off-by: Wei Liu <wei.liu@kernel.org> Acked-by: Joerg Roedel <redacted> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- 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 e09e2d734c57..8d3ce3add57d 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