From: Wei Liu <wei.liu@kernel.org>
To: Linux on Hyper-V List <linux-hyperv@vger.kernel.org>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Joerg Roedel <jroedel@suse.de>,
Stephen Hemminger <sthemmin@microsoft.com>,
Will Deacon <will@kernel.org>,
Haiyang Zhang <haiyangz@microsoft.com>,
Linux Kernel List <linux-kernel@vger.kernel.org>,
Michael Kelley <mikelley@microsoft.com>,
"open list:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
Nuno Das Neves <nunodasneves@linux.microsoft.com>,
Sunil Muthuswamy <sunilmut@microsoft.com>,
virtualization@lists.linux-foundation.org,
Vineeth Pillai <viremana@linux.microsoft.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>
Subject: [PATCH v4 04/17] iommu/hyperv: don't setup IRQ remapping when running as root
Date: Wed, 6 Jan 2021 20:33:37 +0000 [thread overview]
Message-ID: <20210106203350.14568-5-wei.liu@kernel.org> (raw)
In-Reply-To: <20210106203350.14568-1-wei.liu@kernel.org>
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 <jroedel@suse.de>
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
_______________________________________________
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https://lists.linuxfoundation.org/mailman/listinfo/iommu
parent reply other threads:[~2021-01-06 20:34 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20210106203350.14568-1-wei.liu@kernel.org>]
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