[PATCH v4 04/17] iommu/hyperv: don't setup IRQ remapping when running as root
From: Wei Liu <wei.liu@kernel.org>
Date: 2021-01-06 20:35:38
Also in:
linux-iommu, lkml
Subsystem:
iommu subsystem, the rest · Maintainers:
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 1d21a0b5f724..b7db6024e65c 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"
@@ -122,7 +123,7 @@ static int __init hyperv_prepare_irq_remapping(void) if (!hypervisor_is_type(X86_HYPER_MS_HYPERV) || x86_init.hyper.msi_ext_dest_id() || - !x2apic_supported()) + !x2apic_supported() || hv_root_partition) return -ENODEV; fn = irq_domain_alloc_named_id_fwnode("HYPERV-IR", 0);
--
2.20.1