From: Wei Liu <wei.liu@kernel.org>
To: Linux on Hyper-V List <linux-hyperv@vger.kernel.org>
Cc: Wei Liu <wei.liu@kernel.org>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
virtualization@lists.linux-foundation.org,
Linux Kernel List <linux-kernel@vger.kernel.org>,
Nuno Das Neves <nudasnev@microsoft.com>,
"open list:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
Sunil Muthuswamy <sunilmut@microsoft.com>,
Michael Kelley <mikelley@microsoft.com>,
Vineeth Pillai <viremana@linux.microsoft.com>
Subject: [PATCH RFC v1 04/18] iommu/hyperv: don't setup IRQ remapping when running as root
Date: Mon, 14 Sep 2020 11:27:48 +0000 [thread overview]
Message-ID: <20200914112802.80611-5-wei.liu@kernel.org> (raw)
In-Reply-To: <20200914112802.80611-1-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.
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
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next parent reply other threads:[~2020-09-14 11:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200914112802.80611-1-wei.liu@kernel.org>
2020-09-14 11:27 ` Wei Liu [this message]
2020-09-18 9:12 ` [PATCH RFC v1 04/18] iommu/hyperv: don't setup IRQ remapping when running as root Joerg Roedel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200914112802.80611-5-wei.liu@kernel.org \
--to=wei.liu@kernel.org \
--cc=haiyangz@microsoft.com \
--cc=iommu@lists.linux-foundation.org \
--cc=kys@microsoft.com \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mikelley@microsoft.com \
--cc=nudasnev@microsoft.com \
--cc=sthemmin@microsoft.com \
--cc=sunilmut@microsoft.com \
--cc=viremana@linux.microsoft.com \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).